Continuous phase modulation for broadband satellite communications: design and trade‐offs

Beidas, Bassel F.; Cioni, Stefano; Bie, Ulrik De; Ginesi, Alberto; Iyer-Seshadri, R.; Kim, P.; Lee, L. N.; Oh, Deock-Gil; Noerpel, A.R.; Papaleo, Marco; Vanelli‐Coralli, Alessandro

doi:10.1002/sat.1029

Cited by 5 publications

(5 citation statements)

References 20 publications

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“…Because of these interesting features, CPM has been considered over time for several stringent applications and adopted in many standards, recommendations, or proprietary solutions (to cite a few: GSM [3], telemetry [4], Bluetooth [5], optical communications [6], tactical communications, etc.). For satellite communications, CPM has been adopted for the DVB-RCS2 standard [7], deep space communications [8], automatic identification system [9], tactical communications [10], etc. More recently, the CPM was pointed as a candidate for the fifth generation (5G) machine-to-machine (M2M) communications [11] and was proposed for the navigation's inter-satellite links [12].…”

Section: Introductionmentioning

confidence: 99%

Spatially coupled turbo-coded continuous phase modulation: asymptotic analysis and optimization

Benaddi

Poulliat

2020

J Wireless Com Network

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For serially or parallel concatenated communication systems, spatial coupling techniques enable to improve the threshold of these systems under iterative decoding using belief propagation (BP). For the case of low-density parity-check (LDPC) codes, it has been shown that, under some asymptotic assumptions, spatially coupled ensembles have BP thresholds that approach the bitwise maximum a posteriori (MAP) threshold of the related uncoupled ensemble. This phenomenon is often referred to as threshold saturation, and it has sometimes very important consequences. For example, in the case of regular LDPC code ensembles, spatial coupling enables to achieve asymptotically the capacity for any class of binary memoryless symmetric channels. Since then, this threshold saturation has been conjectured or proved for several other types of concatenations. In this work, we consider a serially concatenated scheme which is the serial concatenation of a simple outer convolutional code and a continuous phase modulator (CPM) separated by an interleaver. Then, we propose a method to do the spatial coupling of several replicas of this serially concatenated scheme, aiming to improve the asymptotic convergence threshold. First, exploiting the specific structure of the proposed system, an original procedure is proposed in order to terminate the spatially coupled turbo-coded CPM scheme. In particular, the proposed procedure aims to ensure the continuity of the transmitted signal among spatially coupled replicas, enabling to keep one of the core characteristics and advantages of coded CPM schemes. Then, based on an asymptotic analysis, we show that the proposed scheme has very competitive thresholds when compared to carefully designed spatially coupled LDPC codes. Furthermore, it is shown how we can accelerate the convergence rate of the designed systems by optimizing the

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Section: Introductionmentioning

confidence: 99%

Spatially coupled turbo-coded continuous phase modulation: asymptotic analysis and optimization

Benaddi

Poulliat

2020

J Wireless Com Network

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“…Continuous phase modulation (CPM) is a general class of constant envelope modulation that achieves high spectral efficiency with low spectral sidelobes by requiring a smooth phase transition between adjacent symbols [1]. These characteristics make CPM an ideal choice, with applications in different stringent communication systems employing nonlinear power amplifiers, such as satellite communication [2,3], satellite mesh networks [4,5] and satellite navigation [6,7]. Rimoldi [8] presented a CPM modulator that can be decomposed into a cascade of a time-invariant convolutional encoder conversion from symbol probabilities to bit probabilities and its inversion in the process of transferring extrinsic information [13].…”

Section: Introductionmentioning

confidence: 99%

Dynamic iteration stopping algorithm for non-binary LDPC-coded high-order PRCPM in the Rayleigh fading channel

Xue

Sun

Wei

2016

J Wireless Com Network

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This paper mainly studies the association between non-binary low-density parity-check codes and high-order partial response continuous phase modulation, which prevents information loss in the mutual conversion of bit and symbol probabilities. Although the iterative detection and decoding technique applied in this system can obtain good performance/complexity tradeoff, the iterative process still encounters the problems of positive feedback and relatively large decoding delay, similar to other iterative coded modulation systems. The inhibitory effects of different extrinsic information exchange methods on positive feedback under different signal-to-noise ratio (SNR) conditions are investigated in this work to address this issue. Two dynamic iterative stopping algorithms, namely, cross entropy and hard decision aided combined with weighted extrinsic information exchange for cases with medium and high SNRs, are then proposed. Extrinsic information exchange between the demodulator and the decoder is conducted in the two algorithms through weighted processing. Iterative detection is subsequently performed based on two stopping criteria of dynamic iterative decoding. Theoretic analysis and simulation results for the Rayleigh fading channel show that the combination of weighted extrinsic information exchange and the two dynamic iterative stopping algorithms effectively resists positive feedback and improves the convergence of iterative detection and bit error rate performance. Such a combination also reduces the average iteration number to improve the real-time performance of iterative detection and decoding.

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“…Regarding the first topic, for the last three decades or so, the subject of CPM, which typically is single amplitude with constant envelope signals, has been investigated quite extensively in connection with the design of various transmitter/receiver (transceiver) structures (e.g., see and the references therein). Thanks to their compact spectrum properties, especially in the presence of non‐linear distortion, CPM signals have been used in various telecommunication standards . In satellite communications, for instance, in addition to linear modulation (LM) signals, various CPM signals have been adopted in the DVB‐RCS2 standard .…”

Section: Introductionmentioning

confidence: 99%

“…In particular and within the framework of the DVB-RCS2 standard, the following research topics will be investigated:(1) Continuous phase modulation (CPM) waveform design by considering single-carrier and multicarrier transmission as well as single-amplitude and multi-amplitude signals.(2) Frame timing and carrier frequency synchronization for multi-carrier transmission.Regarding the first topic, for the last three decades or so, the subject of CPM, which typically is single amplitude with constant envelope signals, has been investigated quite extensively in connection with the design of various transmitter/receiver (transceiver) structures (e.g., see [8] and the references therein). Thanks to their compact spectrum properties, especially in the presence of nonlinear distortion, CPM signals have been used in various telecommunication standards [9]. In satellite communications, for instance, in addition to linear modulation (LM) signals, various CPM signals have been adopted in the DVB-RCS2 standard [1].The lesson learnt from the DVB-RCS2 standardization procedure is that, in general, CPM and LM have comparable performance for low-to-medium SE [10].…”

mentioning

confidence: 99%

Performance improvement techniques for the DVB‐RCS2 return link air interface

Mathiopoulos

Candreva

Awoseyila

et al. 2015

Satell Commun Network

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Summary This paper presents performance improvement techniques for the second‐generation digital video broadcast return channel via satellite air interface, which can be used for supporting future demands for Tbit/s traffic requirements. In particular, we have investigated minimum‐shift keying (MSK) type of continuous phase modulation (CPM) waveforms by considering both single‐carrier and multi‐carrier transmission and single‐amplitude and multi‐amplitude signals, which improve the spectral efficiency. In addition, we consider frame timing and synchronization techniques, which make synchronization more accurate and robust. Our research has shown that the MSK single‐carrier frequency‐division multiple access (SC‐FDMA) outperforms the quadrature phase‐shift keying SC‐FDMA in terms of resilience to distortion with the performance gap increasing when the amplifier shows a milder distortion. The performance of a multi‐amplitude CPM scheme, based upon the superposition of two single‐amplitude MSK signals at the radio frequencies level, is also investigated. In comparison with other equivalent linear modulation schemes, performance evaluation results have been shown that the proposed multi‐amplitude CPM scheme significantly improves the spectral efficiency in the presence of adjacent channel interference. Finally, we have proposed a viable and efficient methodology, which enables reliable and accurate timing and frequency synchronization for the SC‐FDMA satellite return link. This involves a combination of global positioning system (GPS)‐based pre‐compensation of differential timing between user terminals, preamble detection in an integrated random access channel, and user channel frequency estimation based on repetitive symbols in the time domain. Copyright © 2015 John Wiley & Sons, Ltd.

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Continuous phase modulation for broadband satellite communications: design and trade‐offs

Cited by 5 publications

References 20 publications

Spatially coupled turbo-coded continuous phase modulation: asymptotic analysis and optimization

Spatially coupled turbo-coded continuous phase modulation: asymptotic analysis and optimization

Dynamic iteration stopping algorithm for non-binary LDPC-coded high-order PRCPM in the Rayleigh fading channel

Performance improvement techniques for the DVB‐RCS2 return link air interface

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