高频电离层信道数据传输交错度分布

高频电离层信道反射信号的幅度衰落服从瑞利分布。本文利用深衰落持续期分布确定交错度分布。对于给定的码元传输速率和行纠错码，电路的工作交错度可有信号的中值电平和多普勒展宽（或信号的中值衰落率）确定。对于３００波特的传输速率和戈莱码纠错，理论和试验均表明电路的工作交错度约为８０。

Interleaving Degree Analysis of Data Transmission System on HF Ionospheric Channels

Envelope fading of reflecting signals on HF ionospheric channels is Rayleigh fading. In this paper, an interleaving degree distribution of interleaved cede is obtained from the distribution of deep fading duration. The operating interleaving degree can be determined by the medium level and Doppler spread(or medium fading rate) of signals. In the cafe of 300 bit/s transmission rate and Golay cede correcting, the operating interleaving degree is about 80 which is given by the theoretical and experimental results.