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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 traditional space-time detection and convolutional code concatenated decoding scheme will space-time detection of the output information only as a priori information encoding, which led to the channel decoding process can not make full use of information. By mapping the a priori information output from the space-time detection into the corresponding encoded channel information, the channel decoder can make full use of all the information output during space-time detection in the decoding process, thereby improving the decoding performance. The analysis and simulation results show that compared with the traditional scheme, the proposed decoding scheme effectively reduces the bit error rate and greatly improves the performance.