摘要
提出了将Turbo码运用于多级调制的码设计和多步译码方法。根据信息理论,将每级Turbo码设计出不同码率,使低层码具有较高的纠错能力,而高层码具有较高的传输信息能力,从而提高系统传输率。对Turbo码多级调制的误码性能进行了分析,得出误码率计算公式,并对Turbo码调制方案进行了仿真,证明了结论的正确性。
In this paper, the recently proposed Turbo-codes are applied to multilevel modulation, then to multistage decoding. Base on the information theory, the method of designing rates and interleaving lengths of Turbo-codes is proposed. Let the lower levels codes have higher correct error capacities, and the higher levels codes have higher transmission capacities, the transmission rate of the system is improved. The performance of Turbo multilevel codes is analyzed, and its formula of error rate is obtained. Simulation results show the validity of the design scheme and the formula.
出处
《电子科技大学学报》
EI
CAS
CSCD
北大核心
2000年第6期591-594,共4页
Journal of University of Electronic Science and Technology of China
基金
电子部预研基金
关键词
多级码
多步译码
码重分布
TURBO码
multilevel code
multistage decode
weight distribution
Turbo code
