稀疏预变换极化码的MIMO传输研究  

MIMO Transmission of Sparsely Pre-transformed Polar Codes

作　　者：陈伯笙 吴泳澎 沈力 CHEN Bosheng;WU Yongpeng;SHEN Li(School of Electronic Information and Electrical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学电子信息与电气工程学院,上海200240

出　　处：《移动通信》2025年第2期31-35,共5页Mobile Communications

基　　金：国家自然科学基金“空分复用无线传输理论与关键技术”(62122052);国家自然科学基金“MIMO巨址无线通信理论与关键技术”(62071289);高等学校学科创新引智计划“智能视频科学与技术”(BP0719010)。

摘　　要：面对未来海量延迟敏感类业务的需求,SPP(Sparsely Pre-transformed Polar)码通过两类预变换降低了极化码在短码长和较小列表大小下SCL译码的错误率。为进一步提升传输效率,研究了SPP码在MIMO信道中的传输。通过归并预变换矩阵的行和列,可以在不损失性能的前提下降低编译码复杂度。同时,利用SPP码的SCL译码输出提取比特级的后验概率,使能SPP码的迭代检测与译码,能明显提升其纠错性能。仿真结果表明,在MIMO迭代系统中,码长为128的SPP码相比于5G极化码实现了约0.8 dB的增益。Meeting the demand of future massive delay-sensitive services,sparsely pre-transformed polar(SPP)codes have reduced the error rate of successive cancellation list(SCL)decoding of polar codes at short block length and small list size through two types of pre-transforms.To further enhance transmission efficiency,the transmission over multiple input multiple output(MIMO)channels for SPP codes is investigated.By merging the rows and columns of the pre-transform matrix,the complexity of encoding and decoding can be reduced without compromising performance.Moreover,by utilizing the SCL decoding outputs of SPP codes to extract the bit-wise posteriori probabilities,iterative detection and decoding of SPP codes are enabled,which significantly improves the error-correcting performance.Simulation results have shown that in MIMO iterative systems,the SPP code with a code length of 128 achieves a gain of about 0.8 dB compared to 5G polar codes.

关 键 词：极化码 预变换 MIMO信道 迭代检测与译码 

分 类 号：TN911.22[电子电信—通信与信息系统]