Capacity-Achieving CPM Schemes

The pragmatic approach to coded continuous-phase modulation (CPM) is proposed as a capacity-achieving low-complexity alternative to the serially concatenated CPM (SC-CPM) coding scheme. In this paper, we first perform a selection of the best spectrally efficient CPM modulations to be embedded into S...

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Bibliographic Details
Published in:IEEE transactions on information theory 2010-04, Vol.56 (4), p.1521-1541
Main Authors: Perotti, A., Tarable, A., Benedetto, S., Montorsi, G.
Format: Article
Language:English
Subjects:
Applied sciences
Baseband
Codes
Coding, codes
Concatenated codes
Continuous-phase modulation (CPM)
Convolutional codes
Data transmission
Decoding
Demodulation
Demodulators
Design engineering
Design optimization
Exact sciences and technology
Flexibility
Information processing
Information theory
Information, signal and communications theory
Iterative decoding
Modulation
Modulation coding
Modulation, demodulation
Optimization
Phase modulation
pragmatic coded modulation
Radio frequency
Receivers & amplifiers
Robustness
serial concatenation
Signal and communications theory
Spectra
spectral efficiency
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Transmission and modulation (techniques and equipments)
Waveforms
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Summary:The pragmatic approach to coded continuous-phase modulation (CPM) is proposed as a capacity-achieving low-complexity alternative to the serially concatenated CPM (SC-CPM) coding scheme. In this paper, we first perform a selection of the best spectrally efficient CPM modulations to be embedded into SC-CPM schemes. Then, we consider the pragmatic capacity (a.k.a. BICM capacity) of CPM modulations and optimize it through a careful design of the mapping between input bits and CPM waveforms. The so obtained schemes are cascaded with an outer serially concatenated convolutional code to form a pragmatic coded-modulation system. The resulting schemes exhibit performance very close to the CPM capacity without requiring iterations between the outer decoder and the CPM demodulator. As a result, the receiver exhibits reduced complexity and increased flexibility due to the separation of the demodulation and decoding functions.
ISSN:0018-9448
1557-9654
DOI:10.1109/TIT.2010.2040861