Rake Demodulator Pdf

Basics of Modulation and Demodulation (. 142 - A2 FM demodulation with the PLL EXPERIMENT FM demodulation There is an FM signal at TRUNKS. 9 MOPS 1 st Deinter - leaving 116 MOPS Rate Match - ing 141 MOPS Turbo De - coding 342 MOPS TrBk. Also studied is the performance when a Rake demodulator is employed. The output of the rake receiver is fed to the equalizer for filter the white noise presence in the receiving signal. DS-SS Transmitter Operation Spread spectrum modulation with Rake receiver. Rohde&Schwarz R&S®PR100 Radio Interference Detection and Analysis 5 The following is a list of common terms associated with the detection of interference in mobile radio network systems: J RFI indicators, impact of RFI on mobile radio networks J Downlink RFI (forward base frequency band), mobile interference. Demodulation is used to demodulate the signal. rakes aries studies Geological Engineering. Frequency hopping 133. It allows the use of either BPSK and/or QPSK encoding, with the PN code. All-Rake Transceivers in Multiple Access Channels Guido C. 25 MHz channel by. 2 Continuous-Phase Modulation (CPM), 711 10. 05 handover/handoff/mobility management, including inter-technology handover/handoff K2. iterative partially coherent demodulation and its application to frequency shift key(fsk) modulated signals by oluwatosin a. Demodulation and bit decisions are then based on the weighted outputs of the M correlators. Three-point linkage mounted Single Rotor Rakes On big tires: the Swadro single rotary rake is optimally equipped with its 16 x 6. The encoding process enlarges the spectrum of the signal and is known as spread spectrum modulation. Channel Model. 375 PULSE OR DIGITAL COMMUNICATIONS 239 CLASS 375 PULSE OR DIGITAL COMMUNICATIONS 375 - 1 130 SPREAD SPECTRUM 131. 15 Essentials in Demodulation 16. • Energy splitted to many finger -> combining. Chang Chip Hong, Andreas Ehrensperger. Uplink Performance Analysis in Multiple MIMO Rayleigh Interference Channel for WCDMA E. 9 Power in AM Wave 16. PERFORMANCE OF COHERENT AND NONCOHERENT RAKE RECEIVERS WITH CONVOLUTIONAL CODING RICEAN FADING AND PULSE-NOISE INTERFERENCE by Kyle Kowalske June 2004 Dissertation Supervisor: Clark Robertson. 2 Effect of multipath on the received signal vector 42 3. adeladan a dissertation presented to the graduate school of the university of florida in partial fulfillment of the requirements for the degree of doctor of philosophy university of florida 2012. The demodulation is performed in the Rake fingers by correlating the received signal with a spreading code over a period corresponding to the spreading factor. The output of the RAKE is then demultiplexed to remove the various physical layer control information such as pilot and power control bits, and passed trough the 2nd Interleaver. For coherent receivers, which are typically based on a Rake. Performance Analysis of CCK Modulation under Multipath Fading Channel Shao-bo Liu1, Aiping Huang1, Zhao-yang Zhang1, and Zhijian Zhang2 1Zhejiang University 2Beijing University of Post and Telecommunications Institute of Information and communication Engineering School of Software Engineering Hangzhou 310027, China P. If the SINR has a dependence on the channel model used then this must be recorded as part of the test conditions. Objectives: • Introduce the fundamentals of wireless communications, including design and practical issues of personal communication services, mobile cellular systems and wireless networks. Bottomley Ericsson Research, Research Triangle Park, NC USA Email: greg. The combining algorithm commonly used in RAKE receivers is maximal ratio com-bining (MRC) which is known to maximize the signal-to-noise ratio (SNR) for diversity channels. Performance Analysis of CCK Modulation under Multipath Fading Channel Shao-bo Liu1, Aiping Huang1, Zhao-yang Zhang1, and Zhijian Zhang2 1Zhejiang University 2Beijing University of Post and Telecommunications Institute of Information and communication Engineering School of Software Engineering Hangzhou 310027, China P. Three varieties of RAKE receivers commonly found in literature are investigated: ARAKE, S-RAKE, and P-RAKE. School of Computer Science and Technology, China University of Mining &Technology, Xuzhou 221116, China. Rahman}, year={2013} }. Phil Karn, KA9Q [email protected] on coherent and non-coherent receiver structures for impulse radio uwb systems Muhammad Gufran Khan on coherent and non-coherent receiver structures for impulse radio uwb systems Muhammad Gufran Khan 2009:02 The demand and growth of short-range wireless communications has been tremendous in the past few years for a diverse range of applications. The added signal is quadrature modulated by two short-PN sequences and up-sampled by 8, and then is applied to shaping filters. Also studied is the performance when a Rake demodulator is employed. A terrestrial outdoor HDTV antenna is essential to receive television. Raketec can be set to run continuously, on a timer program (cycle on/off), or with a water level sensor. 2 GHz DSP Platform Product Bulletin • Multi-standard SOC platform • SOC baseband solution for LTE, TD-SCDMA, WiMAX, cdma2000 and UMTS Tx •integration and a high channel density supported on a single device, the TCI6487 DSP offers Scalable platform • Modular design is ideal for pico, micro and macro BTS • Quick time to. September 1998 doc. AM IS WORTH SAVING. The remodulator, however, is typically implemented at frequencies lower than IF. \sources\com\example\graphics\Rectangle. The structure of a RAKE receiver with Lc = 4 fingers. This gives two data points for every transmitted chip. There are many types of modulation so there are many types of demodulators. 5in Book-08-07 Time Reversal for Ultra-wideband Communications: Architecture and Test-bed 3 to achieve acceptable performance, implying a high-complexity, power hungry and expen-. the decoding and power measurement of the reference symbols on anten-nas 1 and 2 and of the S-SCH and P-SCH synchronization. • Coherent detection (or coherent demodulation) is used to lock phase unto carrier wave in order to enhance detection • The received signal is mixed, in some type of nonlinear device, with a signal from a local oscillator, to produce an intermediate frequency, from which the modulating signal is recovered (detected). There are many diversity techniques to address fading issue, such as OFDM, MIMO, RAKE receiver and etc. Another architecture that uses a custom coarse-grained architecture is detailed in [8]. Three varieties of RAKE receivers commonly found in literature are investigated: A-RAKE, S-RAKE, and P-RAKE. The results are illustrated by theoretical calculations and numerical simulations which point out the enhanced performance of the near optimal demodulator relative to the. 10 Limitations of Amplitude Modulation 16. multiplied by the duration of onebit. AM IS WORTH SAVING. xii!! ACKNOWLEDGEMENTS !! First and foremost, I would like to express my deepest sense of gratitude to my Guru and Supervisor, Dr. We introduce a novel chip discriminator located at each RAKE finger output that selectively removes finger demodulation metrics based on the product of a constant threshold level Tin and the estimated channel tap coefficient ak. Welcome to the Eighth ACM International Conference on Underwater Networks and Systems (WUWNet) Kaohsiung, Taiwan. 4, APRIL 2006 1731 Space-Time Selective RAKE Receiver With Finger Selection Strategies for UWB. Rake receiver. 1 shows the architecture of a missile demodulator according to the invention. This will give us a good reception of WCDMA signal at the receiver end. This system combined a custom reconfigurable parallel processor with a DSP and an FPGA for configurable. Human susceptibility to social influence and its neural correlates are related to perceived vulnerability to extrinsic morbidity risks. The main part of the procedure is illustrated. 26 µs ⇒ 78 m. A differential space-time block code (DSTBC) modulation scheme is used to improve the performance of DS-CDMA systems in fast time-dispersive fading channels. 5in Book-08-07 Time Reversal for Ultra-wideband Communications: Architecture and Test-bed 3 to achieve acceptable performance, implying a high-complexity, power hungry and expen-. CIC (CDMA International Conference, November 2000, Seoul Korea 225 pilot signal, the paging signal, the sync signal, and all the other users’ signals. 5700 Pacific Rim Boulevard Camas, WA 98607, U. Rake receiver contains many receiver sub-radios which are called nger which is responsible for tuning the individual multi-path components. The output of the RAKE is then demultiplexed to remove the various physical layer control information such as pilot and power control bits, and passed trough the 2nd Interleaver. Department of Computer Science, Koforidua Polytechnic, Koforidua, Ghana. Demodulation must be accomplished, in of Spread Spectrum Communications part, by correlation of the received signal with a replica of the signal used in the transmitter to spread the informationtransmitter to spread the information signal. The structure of a RAKE receiver with Lc = 4 fingers. In this paper, we design a rake-based cellular radar receiver (CRR) scheme to detect a moving target located in a multipath environment. It will not matter if there is an HD demodulator in the radio, if the radio is blind to signals from 540 to 1700. PN Data • Agreed simulation model used by DWA: Discrete exponential model - Sampled. • QPSK symbols carry information in phase. 6 The RAKE receiver 22 2. The Rake receiver is consists of a line of delayed cross-correlators i. School of Computer Science and Technology, China University of Mining &Technology, Xuzhou 221116, China. edu Abstract: Co-operative communication uses a technique of combining relay message and direct message to improve the. 06 paging functions K2. RAKE receiver, with its multiple fingers to despread different multipaths, is well suited for this function. › Some units are redundant. A Maximum Likelihood Approach to Blind Multiuser Interference Cancellation Mónica F. • Understand how do AM and FM radio and analog TV work in terms. PSK Demodulation: Part 1 8 WJ Tech Notes 1984 It can be shown that the remodulator is stochastically equivalent to the polarity loop; i. San Jos´eStateUniversity The wireless two-path channel Consider a two-path channel, as depicted in Fig. The CCK demodulation is implemented with a correlator to correlate the 64 CCK complex code word as shown in Figure 6 Figure 5. blocks in the dashed boxing are the initialization of the GA based equalization using RAKE demodulator. The RAKE receiver then uses this phase reference for coherent detection of received data. This is repeated every T seconds, such that the transmitted bit rate is / bits per second. 11-98/331 Submission page 2 of 20 Mark Webster, Harris Semiconductor 1. In bursty transmissions, the signal is transmitted only as needed and the interference is correspondingly reduced. Zhizhang (David) Chen for his patient guidance, valuable advice and for. 1 The adaptive correlator receiver. Several variants of the WED principle in [11] have appeared for different modulation schemes and/or decision rules, e. Ueda, '99 VLSI Circuits Short Course. 5 Wiener filter. The average path loss for this scenario was 110. The combining algorithm commonly used in RAKE receivers is maximal ratio com-bining (MRC) which is known to maximize the signal-to-noise ratio (SNR) for diversity channels. By studying all the above papers, we can have the performance of communication system for various parameters like BER, various fading channels, modulation techniques. Olmos and Silvia Ruiz Universitat Politècnica de Catalunya (UPC). International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research. The transmitted waveforms are Kronecker products of 8-ary Walsh symbols and 7-chip pseudo-noise sequences, with a 5 kHz bandwidth and data rate of 133 bps. [email protected] Use the RC-LPF in the UTILITIES module. In order to get a better estimation of the attenuation in the communication channel at the receiver, we use adaptive RAKE receiver [2] as shown in Figure 3. Phil Karn, KA9Q [email protected] For WCDMA base stations, this involves demodulation of the CPICH control channel on which data is sent at con-stant power and a fixed ratio to the maximum power of the base station. A cyclically operable fluid dispenser for use in dispensing precisely measured charges of potable water aboard spacecraft is described. 13 An example of the correlation results which shows four peaks. Some Benchmark Multipath Performance Data of Coherent CSK Digital Communication Systems Denoting and , the probability. The basic theory described in chapter 2 and 3 is mostly based on the book fiWireless Communications: Principles and Practicefl by Theodore S. Audio Band Digital AM Demodulator Final Project Report December 10, 2006 E155 Eddy Chavarria and Danny La Valle Abstract: AM modulation is often used for radio signals. Human susceptibility to social influence and its neural correlates are related to perceived vulnerability to extrinsic morbidity risks. Because this demodulator has equally spaced taps with tap coefficients that essentially collect all the signal components in the received signal, its operation has been likened to that of an ordinary garden rake. 3 Spectral Characteristics of CPFSK and CPM Signals, 715 10. 3 The signal model 11 2. Robustness of Time Reversal vs. The output of the RAKE filter is given by y i = E is TH, H i,is ib i H i. Ha, Chairman Bradley Department of Electrical and Computer Engineering. After RF demodulation, signal r(n) is fed to a series of tapped delay line. Box 146, Beijing 100876. 286 IEEE TRANSACTIONS ON SIGNAL PROCESSING, VOL. edu CHAPTER14 Modulation and Demodulation This chapter describes the essential principles behind modulation and demodulation, which. • Maximal ratio combining corrects channel phase rotation and weights components with channel amplitude estimate. This can be achieved by using a PLL (phase lock loop) at the receiver. number of arithmetic operations during the RAKE correlation per symbol demodulation. CCK Demodulation Block: implements CCK demodulation. f t f, I 'L II Fig. 4 x 4000MOPS Sync2 Sync1 MaximumSearch Sync1 Sync1 Sync4 Sync3 fs = 65MHz 2nd Inter-leaving 1st Insertion of DTX Indication CRC Physical Channel Mapping Physical Channel Segmen-tation 10MOPS Radio Frame Segmen-tation 63MOPS 1st Inter-leaving 116MOPS. There are many types of modulation so there are many types of demodulators. This will give us a good reception of WCDMA signal at the receiver end. The output of the RAKE is then demultiplexed to remove the various physical layer control information such as pilot and power control bits, and passed trough the 2nd Interleaver. Dynamic precision scaling for low power WCDMA receiver H. A demodulator is an electronic circuit (or computer program in a software-defined radio) that is used to recover the information content from the modulated carrier wave. Browse the most popular brands and models at the best prices on Machinery Pete. Multiuser Detection for CCI Suppression. A workshop given at the 1997 TAPR/ARRL Digitial Communications Conference. 7 The decorrelating detector. 1: Observe on the variation of AM demodulator by changing the amplitude and frequency of audio signal. The rake receiver combines these different paths into a composite signal with substantially better characteristics for demodulation than a single path. A wireless two-path channe EE 160. There is accordingly a need for an improved rake receiver that eliminates the need for separate, local performance of demodulation calculations in each finger. 11 standard without extra processing. A RAKE receiver implementation for direct sequence allows individual signal paths to be separately detected and the coherently combined with other paths. RAKE receiver for DS-SS systems. The course “DSP Implementation of Communication Systems” is based on three main components: Classroom lecture Lab session Project design Each of these items is described in the following subsections. EE 359 - Wireless Communications - Autumn 2014 Final: Total 200 Points, Duration: 8:30-11:30am This exam is open book and notes, and calculators are needed. This paper attempts to provide some insight into the nature of radio propagation in that part of the spectrum (upper VHF to microwave) used by experimenters for high-speed digital transmission. A workshop given at the 1997 TAPR/ARRL Digitial Communications Conference. 7) is described, which uses the transmitted data signal itself for real time channel measurement. LabVIEW the time synchronization function block diagram. 11 standards and their modulation and coding techniques keeping the desired properties of an RFID system in consideration. 2 Effect of multipath on the received signal vector 42 3. Demodulator Finger Cell Demodulator Finger Cell Demodulator Finger RAKE Combine / Descrambler / Deinterleaver Viterbi Decoder Bits Out Cell Demodulator Finger Antenna Bus: 3 (or more) possible cell site antennas Cell Demodulator Finger Fast Hadamard Transform Phase Correction Decimate Timing Tracking Phase From Antenna Bus Tracking Timing. adeladan a dissertation presented to the graduate school of the university of florida in partial fulfillment of the requirements for the degree of doctor of philosophy university of florida 2012. In fact, we can understand a set of Rake Receiver sub-radios, each lagged slightly, to allow the individual components of the multipath can be tuned properly. 375 PULSE OR DIGITAL COMMUNICATIONS 239 CLASS 375 PULSE OR DIGITAL COMMUNICATIONS 375 - 1 130 SPREAD SPECTRUM 131. 1 Signals and Noise, 3. An overall symbol duration of 11 msec. Diode Detector. 6Multiple Antenna. in QPSK modulation. A spatial RAKE receiver is present, which utilize the multi-path effect of the UWB channel. However, it may be still necessary to remove the amplitude and phase shift caused by the channel if you want to apply linear modulation schemes, such as the ones used in WiMAX. ations, modulation and demodulation, physical layer procedures, TDD mode 13. Since the chip. −RAKE −FFT Analog to Digital Digital to Analog X VCO Switch VCO X Power Amplifier Low Noise Amplifier Interface NCO X NCO X CORDIC Co-Processor Implementing SRW on FPGA Soft Core Processor FFT Spreader De-Spread Convolutional Encoder Memory RAKE Receiver Viterbi Decoder Proceeding of the SDR 03 Technical Conference and Product Exposition. Dynamic precision scaling for low power WCDMA receiver H. cleans the screened material from the rakes and ejects the debris. Rake receiver contains many receiver sub-radios which are called nger which is responsible for tuning the individual multi-path components. A true baseband noise assessment can be orchestrated using vector-signal-analysis techniques. Demodulation and bit decisions are then based on the. Employing an easy-to-use Windows-based GUI, DEE makes it easy. The first level, also the fundamental level, is the instantaneous. The output of the RAKE filter is given by y i = E is TH, H i,is ib i H i. Multi-path Radio Channel and Rake Receiver • separate despreading and demodulation of each signal at base station • one Rake receiver with K fingers per user. This paper attempts to provide some insight into the nature of radio propagation in that part of the spectrum (upper VHF to microwave) used by experimenters for high-speed digital transmission. The combining algorithm commonly used in RAKE receivers is maximal ratio com-bining (MRC) which is known to maximize the signal-to-noise ratio (SNR) for diversity channels. *rake On Stop Read Write Seb. Despreading becomes a bit more complicated but we gain frequency diversity. 3 The signal model 11 2. on coherent and non-coherent receiver structures for impulse radio uwb systems Muhammad Gufran Khan on coherent and non-coherent receiver structures for impulse radio uwb systems Muhammad Gufran Khan 2009:02 The demand and growth of short-range wireless communications has been tremendous in the past few years for a diverse range of applications. RAKE receiver for DS-SS systems. We introduce a novel chip discriminator located at each RAKE finger output that selectively removes finger demodulation metrics based on the product of a constant threshold level Tin and the estimated channel tap coefficient ak. • Two multipath signals are resolvable only if their relative delay exceeds the chip pe-riod T c. Ehab Farouk Badran received the B. There are many types of modulation so there are many types of demodulators. TMS320TCI6487 1. This feature motivates the use of RAKE multi- path combining techniques to provide diversity and to capture as much energy as possible from the received signal. 1 I b base-band processor. Demodulator Finger Cell Demodulator Finger Cell Demodulator Finger RAKE Combine / Descrambler / Deinterleaver Viterbi Decoder Bits Out Cell Demodulator Finger Antenna Bus: 3 (or more) possible cell site antennas Cell Demodulator Finger Fast Hadamard Transform Phase Correction Decimate Timing Tracking Phase From Antenna Bus Tracking Timing. The encoding process enlarges the spectrum of the signal and is known as spread spectrum modulation. 02 DRAFT Lecture Notes Last update: April 11, 2012 Comments, questions or bug reports? Please contact {hari, verghese} at mit. PN Data • Agreed simulation model used by DWA: Discrete exponential model - Sampled. Stationary discrete-time stochastic processes, Wiener filter theory, the method of steepest descent, adaptive transverse. Modulation & Demodulation Chapter 2 Modulation and Demodulation The most fundamental building block of a digital communication system is the modulator-demodulator (MODEM) pair. The physical layer has interface to both MAC and RRC sub-layer. TRANSPORT BLOCK ERROR RATES FOR UTRA-FDD DOWNLINK WITH TRANSMISSION DIVERSITY AND TURBO CODING Juan J. QPSK Demodulation: For QPSK demodulator , a coherent demodulator is taken as an example. Please state all assumptions used in your calculations. PSK Demodulation: Part 1 8 WJ Tech Notes 1984 It can be shown that the remodulator is stochastically equivalent to the polarity loop; i. The Simulink model is shown. The hardwired MAC is fully implemented in digital logic. September 9, 2008 9:24 World Scientific Review Volume - 9. of ECS, University of Southampton, SO17 1BJ, UK. By moving the test environment into the lab, this advanced capability enables different design iterations to be evaluated over repeatable test conditions and reduces the cost of testing. 2 Demodulation and Detection, 3. 15{19, September 6th{8th, 2000 c 2005 IEEE. • Two multipath signals are resolvable only if their relative delay exceeds the chip pe-riod T c. RAKE architecture, that requires advanced estimation techniques to overcome the adverse effects of the channel. If, in a mobile radio channel reflected waves arrive with small relative time delays, self interference occurs. 11 protocol employing Direct Sequence Spread-Spectrum (DSSS) and coding is proposed. This course is a required core course in communications engineering which introduces principles of digital communications while reinforcing concepts learned in analog communications systems. MMSE adaptive algorithm is more efficient and powerful because of its ability and features of adaptation to the substantial changes in the UWB multipath wireless communication channel model. This can be achieved by using a PLL (phase lock loop) at the receiver. firm grounding in classical concepts of modulation and demodulation, and then builds on these to introduce advanced concepts in synchronization, non-coherent communication, channel equalization, information theory, channel coding, and wireless communication. (3) Demodulator The searcher performs cell search and path timing detection for the received digital IQ signal input from the AFE. iterative partially coherent demodulation and its application to frequency shift key(fsk) modulated signals by oluwatosin a. Capacity-approaching codes Demodulation Line coding Modem PAM PCM PWM. IEEE TRANSACTIONS ON COMMUNICATIONS, VOL. Abstract Time reversal, that is prefiltering of transmitted signals with time reversed channel impulse responses,. wide bandwidth for anti-multipath and (b) ease of demodulation. 51 The demodulator structure shown in above Figure is called a RAKE demodulator. The main role of rake receiver is to minimize the e ect of signal fading. 13 Comparison of FM and AM 16. Demodulation and bit decisions are then based on the. for demodulation than a single path and maximizing the amount of received signal energy. Audio Band Digital AM Demodulator Final Project Report December 10, 2006 E155 Eddy Chavarria and Danny La Valle Abstract: AM modulation is often used for radio signals. (i)rake corrections (ii) Compression correction, 55. 3 The RAKE Demodulator and Its Performance in Frequency Selective. Area and Power Conscious Rake Receiver Design for Third Generation WCDMA Systems Jina Kim Dr. The State of the Art in Underwater Acoustic Telemetry Daniel B. 14 Demodulation 16. This implementation is not desirable because it is. rates for various signal-to-noise ratios and channel conditions are presented and the use of a RAKE receiver, forward error-correction coding and symbol interleaving are examined for improving system performance. The rake receiver uses several "sub-receivers" each delayed slightly in order to tune in to the individual multipath components. Proximity Sensors detect an object without touching it, and they therefore do not cause abrasion or damage to the object. Start studying Electronic Communication Systems by Blake. Icera’s competitors point out that a truly flexible baseband, however implemented, should have larger size and higher power consumption than air-interface specific basebands. Please state all assumptions used in your calculations. 26 µs ⇒ 78 m. 7, JULY 2005 1271 Advanced RF/Baseband Interconnect Schemes for Inter- and Intra-ULSI Communications. MN88436 is demodulator LSI for terrestrial and cable broadcasts. This feature motivates the use of RAKE multi- path combining techniques to provide diversity and to capture as much energy as possible from the received signal. Neeracher, "SHIVA: Correlator/Demodulator Chip for Direct-Sequence Spread-Spectrum RAKE-Receiver", Technical report no. The decision on which modulation schemes to use lies in the complexity and the performance required. Demodulator Finger Cell Demodulator Finger Cell Demodulator Finger RAKE Combine / Descrambler / Deinterleaver Viterbi Decoder Bits Out Cell Demodulator Finger Antenna Bus: 3 (or more) possible cell site antennas Cell Demodulator Finger Fast Hadamard Transform Phase Correction Decimate Timing Tracking Phase From Antenna Bus Tracking Timing. The digital detector/demodulator reverses the process and extracts the binary baseband information from the received modulated signal which has been subjected to noise, interference and other distortions. The output of the RAKE is then demultiplexed to remove the various physical layer control information such as pilot and power control bits, and passed trough the 2nd Interleaver. d'un corrlateur du rcepteur RAKE. This year marks the first time that WUWNet has been held outside of North America. Asymptotically Optimal UWB Receivers with Noisy Templates: Design and Comparison with RAKE Lin Wu, Xianren Wu, and Zhi Tian, Member, IEEE Abstract—For pulsed ultra-wideband (UWB) radios, a major challenge in receiver design is to collect sufficient energy from ultra-short pulses exposing to strong multipath scattering. DSD Delta Sigma Demodulator › External sigma delta modulator can be connected directly to XMC™without ASIC. Trace screen receive results (modulation function test). IEEE Workshop on Signal Processing Advances in Wireless Communications , Tao Yuan, Taiwan, Mar. , [13], [14], but they are all confined to the data demodulation module only. Die Komplexit¨at eines Empfangers¨ basierend auf dem Rake-Ansatz steigt mit der An-zahl der Finger und ist fur¨ Empfanger¨ mit geringem Leistungsverbrauchnicht geeignet. for demodulation than a single path and maximizing the amount of received signal energy. RAKE receiver power estimator and adaptive receiver filter. The rake receiver combines these different paths into a composite signal with substantially better characteristics for demodulation than a single path. PERFORMANCE OF COHERENT AND NONCOHERENT RAKE RECEIVERS WITH CONVOLUTIONAL CODING RICEAN FADING AND PULSE-NOISE INTERFERENCE by Kyle Kowalske June 2004 Dissertation Supervisor: Clark Robertson. jp Abstract. 7 Sideband Frequencies in AM Wave 16. modulator/demodulator subsystem that can be used as a starting point for a complete 3G or fixed wireless modem. • QPSK symbols carry information in phase. *rake On Stop Read Write Seb. PERFORMANCE OF COHERENT AND NONCOHERENT RAKE RECEIVERS WITH CONVOLUTIONAL CODING RICEAN FADING AND PULSE-NOISE INTERFERENCE by Kyle Kowalske June 2004 Dissertation Supervisor: Clark Robertson. It will not matter if there is an HD demodulator in the radio, if the radio is blind to signals from 540 to 1700. The project design is presented in a separate section. 44 MHz S h Sync2 Sync1 Sync1 Sync4 Sync3 fs = 65 MHz 2 nd Deinter - leaving CRC Physical Channel De - Mapping Physical Channel Deseg - mentation 10 MOPS Radio Frame Deseg - mentation 62. Modulation & Demodulation Chapter 2 Modulation and Demodulation The most fundamental building block of a digital communication system is the modulator-demodulator (MODEM) pair. A corrupted signal from the output of a channel enters the Rake receiver which has M 2/Tc for. b) Explain three attractive features of this modulation technique. For a DS-SS system, we see from the discussions in Chapters 2 and 3 that if we are off even. Refer to the circuit diagram in figure 3. adeladan a dissertation presented to the graduate school of the university of florida in partial fulfillment of the requirements for the degree of doctor of philosophy university of florida 2012. The Rake demodulator detects the DSSS transmitted bitstream by a process known as autocorrelation. Rake receiver contains many receiver sub-radios which are called nger which is responsible for tuning the individual multi-path components. o Rash 3LHeIi Flash Other Port: 0M 19 MultipÞ ESC I Master*l gaud: Esc: Escal ; (COV LPT) C Pat Sett. 2 Block diagram of the digital baseband demodulator finger block has multiple fingers that perform the coherent detection processes on each path, enabling RAKE-combining synthesis with a maxi-mum of eight fingers. Let J1 be short circuit and J2 be open circuit to produce the modulated AM signal as the signal source in this experiment. The finger unit. (application/pdf) (4. MMSE Adaptive Receiver vs. 15{19, September 6th{8th, 2000 c 2005 IEEE. A demodulator is an electronic circuit (or computer program in a software-defined radio) that is used to recover the information content from the modulated carrier wave. 26 µs ⇒ 78 m. was developed for data demodulation in transmit reference systems in [12]. rakes aries studies Geological Engineering. Block Equalization and Generalized MLSE Arbitration for the HSPA WCDMA Uplink Gregory E. School of Computer Science and Technology, China University of Mining &Technology, Xuzhou 221116, China. On the other. This design integrates the code correlation and data demodulation of a RAKE receiver into a single package. However, it may be still necessary to remove the amplitude and phase shift caused by the channel if you want to apply linear modulation schemes, such as the ones used in WiMAX. DEPARTMENT OF COMMERCE PATENT AND TRADEMARK OFFICE CLASSIFICATION ORDER 1864 JULY 3, 2007 PROJECT Y-7145 The following classification changes will be effected by this order:. Hybrid form 132. Possess pseudoPossess pseudo-randomness which makesrandomness, which makes. Neeracher, "SHIVA: Correlator/Demodulator Chip for Direct-Sequence Spread-Spectrum RAKE-Receiver", Technical report no. 07 the major components of a wireless network topology. 2 System Model The system model assumed in this paper is presented in Fig. Zhizhang (David) Chen for his patient guidance, valuable advice and for. [email protected] To avoid timing problems, Nyquist contraints are met by sampling the frequency at twice the chipping rate. 65% reduction in dynamic power dissipation in the reduced complexity RAKE receiver compared to the reference RAKE receiver implementa-tion, with an acceptable performance loss of less than 2dB. LΔ=0, is introduced and its corresponding block diagram is shown in Fig. 13, 01062 Dresden, Germany Abstract— In wideband DS/SS systems the Rake receiver is found to suppress the IPI. venkatramana}@csuohio. The traditional approach uses a coarse delay estimation unit to find the appropriate tap values, and then triggers delay-locked loops (DLLs) connected to the finger to track the multipath. Consider the (7,3) Binary cyclic code, described by the generator polynomial g(p) =1+p+p2 +p4. in QPSK modulation. Though the system diagram looks rather complex, the job of the DSSS wireless transceiver. Symbols 4-ary biorthogonal keying. There is still a reason to make sure AM tuners survive in dashboards and other places; last ditch emergency communications to the public. The Rake demodulator detects the DSSS transmitted bitstream by a process known as autocorrelation. A terrestrial outdoor HDTV antenna is essential to receive television. Demodulation of DSB signal by means of a product detector DSB modulator + + Coherent DSB demodulator Recovered carrier Remarks: † For the sake of simplicity, ka = 1 and Ar = Ac have been chosen † Low-pass filter at the detector output suppresses the sum-frequency output G´eza KOLUMBAN — Dept. 2 Effect of multipath on the received signal vector 42 3. (Free Abstract ) (Download PDF) Paper # 1900170 Identification and analysis of organic waste produced from Australian intensive livestock industries: opportunities for aggregation and treatment via co-digestion. Three varieties of RAKE receivers commonly found in literature are investigated: A-RAKE, S-RAKE, and P-RAKE. Fettweis Vodafone Chair Mobile Communications Systems Dresden University of Technology Mommsenstr. A RAKE receiver implementation for direct sequence allows individual signal paths to be separately detected and the coherently combined with other paths. The basic theory described in chapter 2 and 3 is mostly based on the book fiWireless Communications: Principles and Practicefl by Theodore S. If that were all that was available then to be honest I wouldn't bother with it. These tires offer excellent running and soft treading to protect the turf. Downlink Processing for Mitigation of Intracell Interference in DS-CDMA Systems Michael Joham and Wolfgang Utschick 6th IEEE International Symposium on Spread Spectrum Techniques and Applications (ISSSTA 2000) Parsippany, USA volume 1, pp. September 1998 doc. Each Rake finger consists of two multipliers for applying. 6 Analysis of Amplitude Modulated Wave 16. Order Now! RF/IF and RFID ship same day. S20DSP Cutter pdf manual download. of ECS, University of Southampton, SO17 1BJ, UK. Olmos and Silvia Ruiz Universitat Politècnica de Catalunya (UPC). ¾A RAKE demodulator turns multiple path into diversity - mitigates the fading ¾Additional diversity by synchronization of multiple transmitters › Within a radio cell on the track › At both train ends. It fully supports IEEE802. By studying all the above papers, we can have the performance of communication system for various parameters like BER, various fading channels, modulation techniques. Introduction This document takes a backward look at HARRIS/LUCENT's July presentation. EE 359 - Wireless Communications - Autumn 2014 Final: Total 200 Points, Duration: 8:30-11:30am This exam is open book and notes, and calculators are needed. 25 MHz channels • CDMA – multiple users share a 1. Figure 1: Generic wireless communication system.