一种基于APSK非均匀差错保护的非均衡编码方案  

Unequal Coding Scheme based on APSK Nonuniform Error Protection

作　　者：刘希文 许吉[1] 程晨 LIU Xi-wen;XU Ji;CHENG Chen(College of Electronic and Optical Engineering&College of Microelectronics,Nanjing University of Posts and Telecommunications,Nanjing Jiangsu 210046,China;Smart Interconnection Product Dept.,Sanechips Technology Co.,LTD.,Nanjing Jiangsu 210000,China)

机构地区：[1]南京邮电大学电子与光学工程学院微电子学院,江苏南京210046 [2]深圳市中兴微电子技术有限公司智能互联产品部,江苏南京210000

出　　处：《通信技术》2019年第2期269-274,共6页Communications Technology

基　　金：国家自然科学基金资助项目(No.11404170)~~

摘　　要：幅度与相位联合调制(Amplitude and Phase Shift Keying,APSK)对于映射到星座图上同一个符号点的不同比特具有不均等的差错保护,其中受保护程度较低的比特限制了编码调制系统的整体误码性能。为消除这一限制,提出了一种非均衡编码方案,即对不同保护程度的数据进行分组,通过比特交织的方式匹配不同纠错能力的低密度奇偶校验码(Low Density Parity Check Code,LDPC)进行编码。在64-APSK调制方式下进行计算机仿真,仿真结果表明:均衡编码方案相比传统编码调制方案具有0.3 dB以上的性能增益。APSK(Amplitude and Phase Shift Keying)has unequal error protection for different bits mapped to the same symbol point on the constellation.The less-protected bits limit the overall error performance of the coded modulation system.To eliminate this limitation,a non-equalization coding scheme is proposed,thus to group data with different protection levels,match and code LPDC(low-density parity check code)of different error correction capabilities by bit interleaving.The computer simulation done in the 64-APSK modulation mode indicates that the equalization coding scheme has a performance gain of 0.3 dB or more as compared with the traditional coding modulation scheme.

关 键 词：编码调制系统 幅度与相位联合调制 非均匀差错保护 非均衡编码 

分 类 号：TN911.3[电子电信—通信与信息系统]