Proceedings ArticleDOI
Serially Concatenated Continuous Phase Modulation with Extended BCH Codes
A.G.i. Amat,Charbel Abdel Nour,Catherine Douillard +2 more
- pp 1-5
TLDR
The proposed concatenated structure offers very low error floors (frame error rate below 10-6) and good performance in the waterfall region for all spectral efficiencies, and a significant improvement with respect to previous concatenation CPM schemes is shown.Abstract:
In this paper, serially concatenated continuous phase modulation (CPM) is considered. A concatenated structure consisting of a short extended BCH code as outer code is proposed, targeting a wide choice of spectral efficiencies, ranging from 0.75 to 2.25 bit/s/Hz. A two-step design procedure combining EXIT charts analysis and union bound techniques is used to optimize the association of the outer code and the CPM. An exhaustive study of several quaternary and octal CPM schemes is performed. The proposed concatenated structure offers very low error floors (frame error rate below 10-6) and good performance in the waterfall region for all spectral efficiencies. A significant improvement with respect to previous concatenated CPM schemes is shown. The envisaged application of the proposed scheme is the return link of broadband satellite communications.read more
Citations
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Journal ArticleDOI
Spectrally-efficient continuous phase modulations
TL;DR: The spectral efficiency of continuous phase modulations is investigated, and an effective bandwidth definition for a CPM signal, whose power spectral density has in principle an infinite support is adopted, based on the spacing between adjacent carriers in a frequency division multiplexed CPM system.
Journal ArticleDOI
Capacity-Achieving CPM Schemes
TL;DR: This paper first performs a selection of the best spectrally efficient CPM modulations to be embedded into SC-CPM schemes, then considers the pragmatic capacity (a.k.a. BICM capacity) of CPMmodulations and optimize it through a careful design of the mapping between input bits and CPM waveforms.
Proceedings ArticleDOI
Spectrally-efficient continuous phase modulations
TL;DR: The spectral efficiency of continuous phase modulations is investigated, and an effective bandwidth definition for a CPM signal, whose power spectral density has in principle an infinite support is adopted, based on the spacing between adjacent carriers in a frequency division multiplexed CPM system.
Jointly iterative decoding of low-density parity check codes (ldpc) coded continues phase modulation (cpm)
Nan Zhang,Xiao Gao,Yemao Xu +2 more
TL;DR: This paper investigates the performance of a Low-Density Parity Check codes-coded system transmitted over A WGN channels using octal partial response Continuous Phase Modulation and proposes a belief propagation (BP)-based iterative decoding algorithm at the receiver.
Journal ArticleDOI
Spread Spectrum Codes for Continuous-Phase Modulated Systems
TL;DR: A simple variant of repetition coding involving pseudorandom code words, based on direct-sequence spread spectrum methods, that preserves the spectral density of the encoded signal in order to maintain resistance to narrowband interference is discussed.
References
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Journal ArticleDOI
Convergence behavior of iteratively decoded parallel concatenated codes
TL;DR: A code search based on the EXIT chart technique has been performed yielding new recursive systematic convolutional constituent codes exhibiting turbo cliffs at lower signal-to-noise ratios than attainable by previously known constituent codes.
Journal ArticleDOI
Serial concatenation of interleaved codes: performance analysis, design and iterative decoding
TL;DR: In this article, the authors derived upper bounds to the average maximum likelihood bit error probability of serially concatenated block and convolutional codes with interleaver, and derived design guidelines for the outer and inner encoders that maximize the interleavers gain and the asymptotic slope of the error probability curves.
Journal ArticleDOI
Near-optimum decoding of product codes: block turbo codes
TL;DR: An iterative decoding algorithm for any product code built using linear block codes based on soft-input/soft-output decoders for decoding the component codes so that near-optimum performance is obtained at each iteration.
Journal ArticleDOI
Continuous Phase Modulation--Part I: Full Response Signaling
Tor Aulin,C.-E. Sundberg +1 more
TL;DR: Comparisons are made with minimum shift keying (MSK) and systems have been found which are significantly better in E_{b}/N_{0} for a large signal-to-noise ratio (SNR) without expanded bandwidth, and schemes with the same bit error probability as MSK but with considerably smaller bandwidth have also been found.
Journal ArticleDOI
A decomposition approach to CPM
TL;DR: In this article, it was shown that any continuous-phase-modulation (CPM) system can be decomposed into a continuous phase encoder and a memoryless modulator in such a way that the former is a linear (modulo some integer P) time-invariant sequential circuit and the latter is also time invariant.