摘要
传统的空时检测和卷积码级联译码方案将空时检测输出的信息仅作为编码的先验信息,这导致了信道译码过程中信息不能充分利用。通过将空时检测输出的先验信息映射为对应编码的信道信息,这使得信道译码器在译码过程中能够充分利用空时检测输出的所有信息,从而提高了译码性能。分析和仿真结果表明,所提的译码方案同传统方案相比,有效地降低了误比特率,使性能得到了较大的提高。
The information output from space-time detection is only regarded as the priori information of the coded bits in the conventional concatenated system between space-time detection and convolutional codes,this leads to that the information could not be fully utilized in the process of decoding.The priori information output from space-time detection is mapped as the channel information of the coded bits in this paper,this causes that the channel decoder could utilize all the information output from the space-time detection,thus the decoding performance could be improved.The simulation result and the analysis indicate that the bit-error-rate of the proposed scheme in this paper is reduced greatly as compared with that of the conventional scheme,and this scheme achieves fair performance improvement.
出处
《通信技术》
2010年第7期74-76,79,共4页
Communications Technology
关键词
映射
级联
信道信息
空时检测
mapping
concatenation
channel information
space-time detection
