【摘要】 在分析伪错线性外推算法置信度的基础上 ,结合短波 FH/DQPSK系统 FFT的解调技术 ,提出了一种适用于短波瑞利衰落信道 BER估计的自适应线性外推算法 ,并进行了数值模拟 ,其结果表明 :该算法能够准确地反映信道的实际比特误码特性 ,其绝对误差 Δmax=0 .0 1 8,且该算法监测范围较伪错线性外推算法监测的范围更宽 ,基本上能覆盖该信道的实际比特误码范围 ( 1 0 -1～ 1 0 -4 )。最后提供了该算法可行的硬件实现方案。更多还原

【Abstract】 Based on the analyses of confidence level about the liner’s pseudo-error extrapolation algorithm,and combined with FFT demodulation technology in SW FH/DQPSK system, it proposed a method to estimated BER using adaptive linear extrapolation algorithm in Rayleigh Fading channel. By numerical simulation, the result show that using this method to the real-time frequency monitor can reflect the real BER characteristic of Rayleigh Fading channel exactly.and its absolutes error Δ max=0.018 .The range of monitor was wider than liner’s pseudo-error extrapolation algorithm. It could overwrite the actual BER range of this channel(10 -1~10 -4). At last a kind of realizable hardware schematic for this algorithm is presented.更多还原