基于FFT解调的短波FH-DQPSK系统信道比特误码率的估计
Bit-error-rate\s estimation on FFT-based demodulator in short-wave FH-DQPSK system
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摘要: 该文基于FFT的短波FH-DQPSK系统解调技术,并根据瑞利衰落信道下短波跳频系统DQPSK信号的伪误码率估计,提出了一种采用自适应的线性外推方法来估算信道比特误码率,同时分析了该误码率估算方法的置信度。最后,通过数值模拟结果表明:采用该方法估算的系统监测性能明显优于无外推时的性能。Abstract: Based on a kind of short-wave FH-DQPSK system demodulating technology of FFT and according to PER estimation in the DQPSK system with Rayleigll fading channel,this paper proposes a method to estimate BER using adaptive linear extrapolation algorithm, and analyses the confidence level about this method.The numerical simulated results show that the performance of this method is superior to the estimating method without using extrapolation algorithm.
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