Real-time implementation for reduced-complexity LDPC decoder in satellite communication

Wang, Yongqing; Sun, Liping; Wu, Siliang

doi:10.1109/cc.2014.7019844

Cited by 2 publications

(3 citation statements)

References 21 publications

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“…The iterative message of the BP algorithm is generally expressed in the form of probability or LLR. The advantage of the LLR-BP algorithm over the probabilitybased BP algorithm lies in transforming many multiplication operations into additive operations, thus considerably relieving the implementation complexity of decoding while preserving the decoding performance [5,[18][19][20][21][22][23][24][25][26][27][28][29].…”

Section: Log-likelihood Ratio-belief Propagation (Llr-bp) Algorithmmentioning

confidence: 99%

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Research and Implementation of High-Efficiency and Low-Complexity LDPC Coding Algorithm

Liao,

Guo,

Luo

et al. 2023

Electronics

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In this work, we proposed a high-efficiency and low-complexity encoding algorithm and its corresponding implementation structure during the design and implementation process of an LDPC encoder and decoder. This proposal was derived from extensive research on and analysis of standard encoding algorithms and recursive iterative encoding algorithms, specifically targeting the problem of high computational complexity in encoding algorithms. Subsequently, we combined binary phase-shift keying modulation mode and additive white Gaussian noise channel transmission with the min-sum decoding algorithm to realize the (1536, 1024) LDPC codec. This codec was uniformly quantized with a (6, 2) configuration, executed eight iterations, and achieved a 2/3 code rate in the IEEE802.16e standard. At the bit error rate (BER) of 10−5, the codec’s BER obtained by the proposed coding algorithm was about 0.25 dB lower than the recursive-iterative coding algorithm and was about 1.25 dB lower than the standard coding algorithm, which confirms the correctness, effectiveness, and feasibility of the proposed algorithm.

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Section: Log-likelihood Ratio-belief Propagation (Llr-bp) Algorithmmentioning

confidence: 99%

“…The MSA algorithm, a simplified form of the LLR-BP algorithm, performs the following simplification during the check nodes update [22][23][24][25][26][27][28][29][30][31][32]:…”

Section: Min-sum Algorithm(msa)mentioning

confidence: 99%

Research and Implementation of High-Efficiency and Low-Complexity LDPC Coding Algorithm

Liao,

Guo,

Luo

et al. 2023

Electronics

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“…The non-binary codes outperformed the binary counterpart by more than 0.3 dB in AWGN channels, and this gain was increased to 1 dB for the short block length in CCSDS up-link standard. To reduce decoding complexity, a realtime implementation of LDPC decoder was proposed by using a lookup table in satellite communications [24]. The implementation results on Xilinx Field Programmable Gate Array (FPGA) chip illustrated that the simplified decoder can achieve at last 28.6% and 8% cost reduction in RAM and slices, respectively as compared to conventional structures.…”

Section: Introductionmentioning

confidence: 99%

The Design of Vertical RS-CRC and LDPC Code for Ship-Based Satellite Communications On-the-Move

et al. 2019

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This paper investigates the decoding performance of channel-coded ship-based satellite communications on-the-move (SSCOTM) between ships and satellites. In practical communications, ship antennas deviated from satellites by wind waves suffer rapid channel degradation with serious burst errors and even losing all the data. To address this issue, we first establish a mathematical model to study the influence of wind waves and derive the effective signal-to-noise ratio (SNR) in SSCOTM. Second, we propose a vertical Reed-Solomon (RS) with cyclic redundancy check (CRC) and low-density parity check (VRC-LDPC) code, where the RS code and LDPC code are treated as the inner code and outer code to correct both burst and random errors, respectively. Moreover, both the encoder and the decoder of the proposed VRC-LDPC can be carried out in parallel implementations. Finally, simulation results show that the proposed VRC-LDPC performs much better than the conventional codes of the Consultative Committee for Space Data Systems (CCSDS) standard. Thus, this paper provides an excellent alternative channel code for reliable error-correction systems of SSCOTM.

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Real-time implementation for reduced-complexity LDPC decoder in satellite communication

Cited by 2 publications

References 21 publications

Research and Implementation of High-Efficiency and Low-Complexity LDPC Coding Algorithm

Research and Implementation of High-Efficiency and Low-Complexity LDPC Coding Algorithm

The Design of Vertical RS-CRC and LDPC Code for Ship-Based Satellite Communications On-the-Move

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