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1.东南大学信息科学与工程学院,移动通信全国重点实验室,江苏南京 211189
2.紫金山实验室,江苏南京 211111
3.金陵科技学院网络与通信工程学院,江苏南京 211169
4.上海第二工业大学计算机与信息工程学院,上海 201209
Received:30 December 2024,
Accepted:05 September 2025,
Published:25 September 2025
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姜明, 刘祎萌, 徐悦, 等. 面向超大规模多天线传输的时空乘积编码技术[J]. 电子学报, 2025, 53(09): 3233-3244.
JIANG Ming, LIU Yi-meng, XU Yue, et al. Spatiotemporal Product Coding Technique Combined with Massive MIMO Transmission[J]. Acta Electronica Sinica, 2025, 53(09): 3233-3244.
姜明, 刘祎萌, 徐悦, 等. 面向超大规模多天线传输的时空乘积编码技术[J]. 电子学报, 2025, 53(09): 3233-3244. DOI:10.12263/DZXB.20241180
JIANG Ming, LIU Yi-meng, XU Yue, et al. Spatiotemporal Product Coding Technique Combined with Massive MIMO Transmission[J]. Acta Electronica Sinica, 2025, 53(09): 3233-3244. DOI:10.12263/DZXB.20241180
由于充分挖掘了超大规模多天线系统的空间维度资源,时空二维编码可以有效解决极低时延约束下短块长编码传输性能严重劣化的问题,但目前该编码方案与等效大块长近香农限编码性能仍有较大差距.针对现有时空二维编码采用的交织串行级联结构在实际编译码中遇到的性能劣化等问题,本文提出一种适用于高效迭代译码的新型时空二维并行级联编码(时空乘积码).该编码方案在并行级联的乘积编码之后再进行特定的时域/空域映射,提高了编码交织深度并适用于高并行的迭代译码,从而提高了整体编译码的效率和可靠性.此外,本文所提编码方案充分利用了多天线在空间维度的优势,通过配置乘积码的不同分量码和不同的时域/空域映射方式,进一步提升传输性能并降低处理时延.论文具体引入单奇偶校验码作为空间维度的乘积级联分量码构造时空乘积码,仿真研究了时域/空域映射、分量码码长码率和调制方式对时空乘积码译码性能的影响,并详细分析了相应的传输和译码时延.仿真结果表明,本文所提时空乘积码方案相比于现有时空二维编码方案在误帧率为10
-3
下能实现0.4~2.3 dB的性能增益,同时所提方案更适合并行迭代译码和极低时延传输.
Due to fully exploiting the spatial dimension resources of the massive multi-antenna system
spatiotemporal two-dimensional coding can effectively solve the problem of severe transmission performance degradation of short block-length coding under the very low delay constraints
but there is still a large gap between the performance of this coding scheme and that of the equivalent large-block-length near-Shannon-limited coding currently. Aiming at the issues of performance degradation encountered in the practical coding process of the interleaved serial cascade structure adopted by the existing spatiotemporal two-dimensional coding
this paper proposes a new spatiotemporal two-dimensional parallel concatenated code coding (spatiotemporal product code) suitable for efficient iterative decoding. The coding scheme
which performs a specific time/space domain mapping after the product coding in parallel cascades
improves the coding interleaving depth and is suitable for highly parallel and iterative decoding
which improves the efficiency and reliability of the overall compilation code. In addition
the coding scheme proposed in this paper makes full use of the advantages of multiple antennas in the spatial dimension
and further improves the transmission performance and reduces the processing
delay by configuring the different component codes of the product code and different time/space domain mappings. The paper specifically introduces the single parity-check code as a product cascade component code in the spatial dimension to construct the spatiotemporal product code
simulates and investigates the impacts of time/space domain mapping
component code length and code rate and modulation on the decoding performance of spatiotemporal product codes
and analyzes the corresponding transmission and decoding delays in detail. Simulation results show that the spatiotemporal product code scheme proposed in this paper can achieve a performance gain of 0.4~2.3 dB at a block error rate of 10
-3
compared with the existing spatiotemporal two-dimensional coding scheme
the proposed scheme is also more suitable for parallel iterative decoding and ultra-low latency transmission.
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