Serially concatenated extended CPM scheme based on TDRSS

Su, Linbo; Wang, Ningyan; Zhang, Yani; Xia, Guijin; Xue, Yali; Lv, Jiaoke

doi:10.1088/1742-6596/1486/6/062003

Cited by 1 publication

(1 citation statement)

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“…To further enhance the power and bandwidth efficiencies, coded CPM with symbol mapping using iterative decoding was presented. Considering the excellent properties of CPM and the serially concatenated principles [10,11], some particularly attractive solutions have become the focus of research, such as the convolutional [12,13], turbo [14][15][16], and low-density parity-check (LDPC) coded CPM [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Optimized Design for NB-LDPC-Coded High-Order CPM: Power and Iterative Efficiencies

Xue

Wang

Sun³

et al. 2020

Symmetry

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In this paper, a non-binary low-density parity-check (NB-LDPC) coded high-order continuous phase modulation (CPM) system is designed and optimized to improve power and iterative efficiencies. Firstly, the minimum squared normalized Euclidean distance and the 99% double-sided power bandwidth are introduced to design a competitive CPM, improving its power efficiency under a given code rate and spectral efficiency. Secondly, a three-step method based on extrinsic information transfer (EXIT) and entropy theory is used to design NB-LDPC codes, which reduces the convergence threshold approximately 0.42 and 0.58 dB compared with the candidate schemes. Thirdly, an extrinsic information operation is proposed to address the positive feedback issue in iterative detection and decoding and the value of bit error rate (BER) can approximately be reduced by 5×10−3. Finally, iteration optimization employing the EXIT chart and mutual information between demodulation and decoding is performed to achieve a suitable tradeoff for the communication reliability and iterative decoding delay. Simulation results show that the resulting scheme provides an approximately 3.95 dB coding gain compared to the uncoded CPM and achieves approximately 0.5 and 0.7 dB advantages compared with the candidate schemes. The resulting NB-LDPC-coded high-order CPM for a given code rate and spectral efficiency converges earlier into a turbo cliff region compared with other competitors and significantly improves power and iterative efficiencies.

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