Journal ArticleDOI
Channel coding with multilevel/phase signals
TLDR
A coding technique is described which improves error performance of synchronous data links without sacrificing data rate or requiring more bandwidth by channel coding with expanded sets of multilevel/phase signals in a manner which increases free Euclidean distance.Abstract:
A coding technique is described which improves error performance of synchronous data links without sacrificing data rate or requiring more bandwidth. This is achieved by channel coding with expanded sets of multilevel/phase signals in a manner which increases free Euclidean distance. Soft maximum--likelihood (ML) decoding using the Viterbi algorithm is assumed. Following a discussion of channel capacity, simple hand-designed trellis codes are presented for 8 phase-shift keying (PSK) and 16 quadrature amplitude-shift keying (QASK) modulation. These simple codes achieve coding gains in the order of 3-4 dB. It is then shown that the codes can be interpreted as binary convolutional codes with a mapping of coded bits into channel signals, which we call "mapping by set partitioning." Based on a new distance measure between binary code sequences which efficiently lower-bounds the Euclidean distance between the corresponding channel signal sequences, a search procedure for more powerful codes is developed. Codes with coding gains up to 6 dB are obtained for a variety of multilevel/phase modulation schemes. Simulation results are presented and an example of carrier-phase tracking is discussed.read more
Citations
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Journal ArticleDOI
Noncoherently detected trellis-coded partial response CPM on mobile radio channels
Lihbor Yiin,Gordon L. Stuber +1 more
TL;DR: A noncoherent receiver is proposed for partial response trellis-coded continuous phase modulation (TC-CPM) on interleaved flat Rician-fading channels and it is concluded that in terms of joint power-bandwidth complexity, 2RC is the best candidate for rate-1/2 TCM codes.
Proceedings ArticleDOI
Turbo coded trellis-based constructions for data embedding: channel coding with side information
TL;DR: A new turbo-coded trellis-based code construction that appears to be very promising: for the Gaussian CCSI problem at a transmission rate of 1 bit/channel use, this proposed approach comes within 2.72 dB of the information-theoretic capacity established by M. Costa.
Journal ArticleDOI
Unified MIMO-Multicarrier Designs: A Space–Time Shift Keying Approach
TL;DR: A survey and tutorial is provided on the subject of multiple-input-multiple-output (MIMO) multicarrier (MC) systems relying on the space-time shift keying (STSK) concept, followed by the design of STSK systems in the context of MC modulation-based transmissions over dispersive wireless channels.
Journal ArticleDOI
Probabilistic Shaping for Finite Blocklengths: Distribution Matching and Sphere Shaping.
TL;DR: In this article, a comparison of distribution matching (DM) and sphere shaping (SpSh) algorithms for short blocklength probabilistic amplitude shaping is presented, where the objective of shaping is reformulated as obtaining the most energy-efficient signal space for a given rate.
Journal ArticleDOI
Performance of trellis-coded modulation for equalized multipath fading ISI channels
TL;DR: An effective interleaver-dein terleaver is identified that allows joint DDFSE equalization and decoding to be used without the need for equalization before decoding.
References
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TL;DR: This chapter discusses Coding for Discrete Sources, Techniques for Coding and Decoding, and Source Coding with a Fidelity Criterion.
Journal ArticleDOI
The viterbi algorithm
TL;DR: This paper gives a tutorial exposition of the Viterbi algorithm and of how it is implemented and analyzed, and increasing use of the algorithm in a widening variety of areas is foreseen.
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I. M. Jacobs,J. M. Wozencraft +1 more
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Journal ArticleDOI
Convolutional codes I: Algebraic structure
TL;DR: Minimal encoders are shown to be immune to catastrophic error propagation and, in fact, to lead in a certain sense to the shortest decoded error sequences possible per error event.
Journal ArticleDOI
Coherent and Noncoherent Detection CPFSK
W. Osborne,M. Luntz +1 more
TL;DR: This work provides a complete analysis of the performance of CPFSK at high SNR as well as low SNR and thereby unifies and extends the results previously available.