CAJ | 학술논문

LDPC码具有接近香农极限的性能和适中的编译码复杂度，在深空通信中具有较大应用前景。该文介绍了空间数据系统咨询委员会标准推荐的累积重复累积码，根据码字的原模图对ARA码进行了设计和分析。经过改进得到AR4JA码性能良好，具有系列性，采用并行结构解码，编解码复杂度较低。相关的仿真结果表明，采用该文所提出的改进原模图构造方法，在4/5码率，3．7 dB信噪比下，可以获得接近10-6的误码性能。
LDPC마구유접근향농겁한적성능화괄중적편역마복잡도，재심공통신중구유교대응용전경。해문개소료공간수거계통자순위원회표준추천적루적중복루적마，근거마자적원모도대ARA마진행료설계화분석。경과개진득도AR4JA마성능량호，구유계렬성，채용병행결구해마，편해마복잡도교저。상관적방진결과표명，채용해문소제출적개진원모도구조방법，재4/5마솔，3．7 dB신조비하，가이획득접근10-6적오마성능。
Low density parity check ( LDPC ) codes has good performance close to the Shannon limit with moderate codec complexity , which endows it with large application prospects in deep space communications . The accumulate repeat accumulate ( ARA ) codes which can be described by protograth is recommended by CCSDS for application in deep space telemetry channel coding , is introduced.The AR4JA codes perform well under iterative decoding and feature a simple encoder structure and a fast decoder structure .Simulation results show that, adopt the proposed improvements protograph construction method , in 4/5 rate, 3.7 dB SNR, BER get close to 10 -6 .