An Improved Method for the Convergence of Iterative Detection in Turbo-CPM System

Xue, Rui; Zhao, Dixian; Zhang, Jie

doi:10.1109/wicom.2009.5302993

Cited by 6 publications

(3 citation statements)

References 19 publications

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“…The turbo-CPM scheme is discussed in [10], where a constituent encoder with the generator polynomial (10,04,15) in octal representation is employed by turbo. Convolutional coded CPM (CC-CPM) schemes are studied in [23] and [34], where the generator polynomials of CC are (13,06,16) [23] and (11,06,16) [34], respectively.…”

Section: Simulation Resultsmentioning

confidence: 99%

“…(17), it results that the weighted parameter is the key factor that affects performance. Excellent performance has been obtained with values of α ∈ [0.6, 0.9] and β ∈ [0.001, 0.01] in similar coded CPM systems [10,12]. However, the specific α and β values in the system we investigate need to be determined using simulation experiments.…”

Section: Weighted Exchange Methods Of Extrinsic Informationmentioning

confidence: 99%

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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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Section: Simulation Resultsmentioning

confidence: 99%

Section: Weighted Exchange Methods Of Extrinsic Informationmentioning

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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“…The serially concatenated CPM schemes combined with convolutional codes [9], [10] or turbo codes [11] can improve power efficiency, and the convergence threshold is much higher than Shannon limit. To improve error performance and bandwidth efficiency, we introduce LDPC coded CPM scheme with iterative decoding and demodulation.…”

Section: Introductionmentioning

confidence: 99%

A Joint Coded Modulation Scheme and Its Iterative Receiving for Deep-Space Communications

Xue

Chen

2012

2012 8th International Conference on Wireless Communications, Networking and Mobile Computing

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Space exploration missions have become increasingly complicated and various, and the current deep-space communication schemes can't meet the demand of high-speed and real-time multimedia correspondence. Therefore, the design of a fast and efficient transmission scheme is one of the important ways to solve the conflict. With organic combination of LDPC codes, continuous phase modulation (CPM) and turbo iterative detection, a scheme of joint coded modulation based on turbo principle is presented. In this paper, the model of LDPC-CPM system is established firstly, then realization scheme of CPM is proposed, and the effect of main parameters on the performance of the system is studied finally, which can provide the reference basis for practical application. The research results show that the proposed scheme can not only improve power efficiency and BER performance in the background of extremely low SNR effectively, but also give consideration to validity of information transmission and improve the band efficiency, and partly solve the problem of failing to give attention to both high-speed transmission and reliable transmission. Meanwhile, the receiver whose implementation is achievable can reach a good compromise between performance and complexity.

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Adaptive Coded Modulation Based on Continuous Phase Modulation for Inter-Satellite Links of Global Navigation Satellite Systems

2018

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An Improved Method for the Convergence of Iterative Detection in Turbo-CPM System

Cited by 6 publications

References 19 publications

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

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

A Joint Coded Modulation Scheme and Its Iterative Receiving for Deep-Space Communications

Adaptive Coded Modulation Based on Continuous Phase Modulation for Inter-Satellite Links of Global Navigation Satellite Systems

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