短波跳频FH/QDPSK系统信道自适应监测的研究(Ⅰ)

Adaptive Monitoring Real-Time Channel's Bit-Error-Rate in Short-Wave for FH/QDPSK System (Ⅰ)

基于短波跳频FH/QDPSK系统的FFT解调 ,利用FFT解调的结果 ,提出了在瑞利衰落信道中对信道的比特误码率BER进行实时自适应监测方法 ,该方法利用伪错外推较好地解决了在较短的监测时间获取较精确的监测结果。模拟结果表明 :采用伪错的线性外推算法 ,其估值的最大绝对误差不超过 0 89,最大相对误差不超过35 7%。

Based on the implements of FFT (Fast Fourier Transform) demodulator in FH/QDPSK system, making use of the data of FFT, this paper proposed a method of real-time adaptively measuring the Rayleigh fading channel's bit-error-rate (BER). This method was the pseudo error rate extrapolation algorithm, it could have a better measure results in a short measure period. The simulation result show that the linear extrapolation algorithm can raise the maximum absolute deviation of evaluation of HF channel's BER to 0 89, the maximum relative deviation of its to 35 7%.\;