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Iterative Phase Synchronization For Noncoherent Coded Modulation Systems


Iterative Phase Synchronization For Noncoherent Coded Modulation Systems
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Iterative Phase Synchronization For Noncoherent Coded Modulation Systems


Iterative Phase Synchronization For Noncoherent Coded Modulation Systems
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Author : 詹智翔
language : en
Publisher:
Release Date : 2008

Iterative Phase Synchronization For Noncoherent Coded Modulation Systems written by 詹智翔 and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.




Advanced Synchronization Techniques For Continuous Phase Modulation


Advanced Synchronization Techniques For Continuous Phase Modulation
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Author : Qing Zhao
language : en
Publisher:
Release Date : 2006

Advanced Synchronization Techniques For Continuous Phase Modulation written by Qing Zhao and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Iterative methods (Mathematics) categories.


The objective of this research work is to develop reliable and power-efficient synchronization algorithms for continuous phase modulation (CPM). CPM is a bandwidth and power efficient signaling scheme suitable for wireless and mobile communications. Binary CPM schemes have been widely used in many commercial and military systems. CPM with multilevel symbol inputs, i.e., M-ary CPM, can achieve a higher data rate than binary CPM. However, the use of M-ary CPM has been limited due to receiver complexity and synchronization problems. In the last decade, serially concatenated CPM (SCCPM) has drawn more attention since this turbo-like coded scheme can achieve near Shannon-limit performance by performing iterative demodulation/decoding. Note that SCCPM typically operates at a low signal-to-noise ratio, which makes reliable and power-efficient synchronization more challenging. In this thesis, we propose a novel timing and phase recovery technique for CPM. Compared to existing maximum-likelihood estimators, the proposed data-aided synchronizer can achieve a better acquisition performance when a preamble is short or channel model errors are present. We also propose a novel adaptive soft-input soft-output (A-SISO) module for iterative detection with parameter uncertainty. In contrast to the existing A-SISO algorithms using linear prediction, the parameter estimation in the proposed structure is performed in a more general least-squares sense. Based on this scheme, a family of fixed-interval A-SISO algorithms are utilized to implement blind iterative phase synchronization for SCCPM. Moreover, the convergence characteristics of iterative phase synchronization and detection are analyzed by means of density evolution. Particularly, an oscillatory convergence behavior is observed when cycle slips occur during phase tracking. In order to reduce performance degradation due to this convergence fluctuation, design issues, including delay depth of the proposed algorithms, iteration-stopping criteria and interleaver size, are also discussed. Finally, for completeness of the study on phase synchronization, we investigate the error probability performance of noncoherently detected full-response CPM, which does not require channel (or phase) estimation.



Non Coherent Iterative Demodulation And Decoding Of Serially Concatenated Continuous Phase Modulation


Non Coherent Iterative Demodulation And Decoding Of Serially Concatenated Continuous Phase Modulation
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Author : Yaron Gottfried
language : en
Publisher:
Release Date : 2002

Non Coherent Iterative Demodulation And Decoding Of Serially Concatenated Continuous Phase Modulation written by Yaron Gottfried and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Decoders (Electronics) categories.




Phase Synchronization In Partial Response Coded Modulation


Phase Synchronization In Partial Response Coded Modulation
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Author : Alejandro Navarrete Torres
language : en
Publisher:
Release Date : 1995

Phase Synchronization In Partial Response Coded Modulation written by Alejandro Navarrete Torres and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with categories.




Synchronization Of Coded Modulation Systems At Low Snr


Synchronization Of Coded Modulation Systems At Low Snr
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Author : Lijun Lu
language : en
Publisher:
Release Date : 1997

Synchronization Of Coded Modulation Systems At Low Snr written by Lijun Lu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with categories.




Coded Modulation Systems


Coded Modulation Systems
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Author : John B. Anderson
language : en
Publisher: Springer Science & Business Media
Release Date : 2006-04-11

Coded Modulation Systems written by John B. Anderson and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006-04-11 with Technology & Engineering categories.


Coded Modulation Systems is an introduction to the subject of coded modulation in digital communication. It is designed for classroom use and for anyone wanting to learn the ideas behind this modern kind of coding. Coded modulation is signal encoding that takes into account the nature of the channel over which it is used. Traditional error correcting codes work with bits and add redundant bits in order to correct transmission errors. In coded modulation, continuous time signals and their phases and amplitudes play the major role. The coding can be seen as a patterning of these quantities. The object is still to correct errors, but more fundamentally, it is to conserve signal energy and bandwidth at a given error performance. The book divides coded modulation into three major parts. Trellis coded modulation (TCM) schemes encode the points of QAM constellations; lattice coding and set-partition techniques play major roles here. Continuous-phase modulation (CPM) codes encode the signal phase, and create constant envelope RF signals. The partial-response signaling (PRS) field includes intersymbol interference problems, signals generated by real convolution, and signals created by lowpass filtering. In addition to these topics, the book covers coding techniques of several kinds for fading channels, spread spectrum and repeat-request systems. The history of the subject is fully traced back to the formative work of Shannon in 1949. Full explanation of the basics and complete homework problems make the book ideal for self-study or classroom use.



Noncoherent Coded Modulation


Noncoherent Coded Modulation
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Author : Lutz Lampe
language : en
Publisher:
Release Date : 2002-01

Noncoherent Coded Modulation written by Lutz Lampe and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002-01 with categories.




An Iterative Information Reduced Quadriphase Shift Keyed Carrier Synchronization Scheme Using Decision Feedback For Low Signal To Noise Ratio Applications


An Iterative Information Reduced Quadriphase Shift Keyed Carrier Synchronization Scheme Using Decision Feedback For Low Signal To Noise Ratio Applications
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Author : National Aeronautics and Space Administration (NASA)
language : en
Publisher: Createspace Independent Publishing Platform
Release Date : 2018-06-24

An Iterative Information Reduced Quadriphase Shift Keyed Carrier Synchronization Scheme Using Decision Feedback For Low Signal To Noise Ratio Applications written by National Aeronautics and Space Administration (NASA) and has been published by Createspace Independent Publishing Platform this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-06-24 with categories.


In a previous publication [1], an iterative closed-loop carrier synchronization scheme for binary phase-shift keyed (BPSK) modulation was proposed that was based on feeding back data decisions to the input of the loop, the purpose being to remove the modulation prior to carrier synchronization as opposed to the more conventional decision-feedback schemes that incorporate such feedback inside the loop. The idea there was that, with sufficient independence between the received data and the decisions on it that are fed back (as would occur in an error-correction coding environment with sufficient decoding delay), a pure tone in the presence of noise would ultimately be produced (after sufficient iteration and low enough error probability) and thus could be tracked without any squaring loss. This article demonstrates that, with some modification, the same idea of iterative information reduction through decision feedback can be applied to quadrature phase-shift keyed (QPSK) modulation, something that was mentioned in the previous publication but never pursued. Simon, M. and Tkacenko, A. Jet Propulsion Laboratory IPN-PR-42-164



Ldpc Coded Modulations


Ldpc Coded Modulations
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Author : Michele Franceschini
language : en
Publisher: Springer Science & Business Media
Release Date : 2009-04-09

Ldpc Coded Modulations written by Michele Franceschini and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009-04-09 with Technology & Engineering categories.


This book focuses on the analysis and design of low-density parity-check (LDPC) coded modulations, which are becoming part of several current and future communication systems, such as high-throughput terrestrial and satellite wireless networks. In this book, a two-sided perspective on the design of LDPC coded systems is proposed, encompassing both code/modulation optimization (transmitter side) and detection algorithm design (receiver side). After introducing key concepts on error control coding, in particular LDPC coding, and detection techniques, the book presents several relevant applications. More precisely, by using advanced performance evaluation techniques, such as extrinsic information transfer charts, the optimization of coded modulation schemes are considered for (i) memoryless channels, (ii) dispersive and partial response channels, and (iii) concatenated systems including differential encoding. This book is designed to be used by graduate students working in the field of communication theory, with particular emphasis on LDPC coded communication schemes, and industry experts working on related fields.



Noncoherent Coded Modulation


Noncoherent Coded Modulation
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Author : Dan Raphaeli
language : en
Publisher:
Release Date : 1994

Noncoherent Coded Modulation written by Dan Raphaeli and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Electronic dissertations categories.