摘要
第三代短波自动链路建立系统(3G-ALE)的发送波形采用了多进制正交扩频和截尾卷积码技术。将比特软值提取值算法与环绕Viterbi算法(WAVA)相结合,将正交扩频解调的比特软值用于WAVA译码算法,从而改进了3G-ALE系统译码算法。仿真结果表明,新的译码算法与传统的硬判决算法相比性能有较大提高,在误帧率为10-2时性能在传统算法基础上提高了2.2dB。
Tail biting convolution code and orthogonal spread spectrum modulation have been applied in burst waveforms of the third automatic link establishment（3G-ALE） system.Dualmaximum algorithm is used in order to compute bit soft-output of orthogonal spread spectrum modulation and wrap-around Viterbi algorithm（WAVA） is adopted to decode tail biting CC.With the new method,the performance of the 3G-ALE system improved markedly.The new scheme performs better than the traditional by about 2.2dB at a frame error probability of 10-2.
出处
《煤炭技术》
CAS
北大核心
2010年第10期161-163,共3页
Coal Technology
