DTMB中NR码软解码的实现

Design of Soft-in-soft-out Decoder of NR Code in DTMB National Standard System

提出了一种有效的软输入软输出NR解码方法,可应用于地面数字电视广播传输标准(DTMB)中。其算法基于软输入的最大似然概率译码,使用最大相关码字和次最大相关码字产生输出软信息。经仿真验证,引入此方案的NR解码后,P8码率LDPC解码性能提高了约3.6dB。

A soft-in-soft-out NR decoding method is designed for Digital Terrestrial Multimedia Broadcasting （DTMB） National Standard System in this paper. The proposed method is based on the soft-in maximum likelihood decoding method, and the output is generated by the most correlative codeword and the second most correlative codeword. The simulation results show that the performance of P8 LDPC decoder increase around 3.6 dB.