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以Gilbert-Elliot数字信道模型(GE模型)作为数字移动通信信道模型,分析了该模型的突发误差(Burst Error)统计特性.用PCM及ADPCM编码方法,研究了在信道各种不同平均比特误差率p条件下的语音信号输出性能,以及使用不同交错(Intereaving)因子s条件下信道输出特性.同时还研究了产生统计独立误差的Bernoulli(BR模型)信道在上述语音编码条件下的输出特性.得出在较低信道平均比特误差率的条件下,两种信道模型有接近相同的输出信噪比。
The Gilbert-Elliot digital channel model (GE model) is used as the digital mobile communication channel model, and the statistical characteristics of Burst Error of the model are analyzed. Using PCM and ADPCM coding methods, the different average bit errors Rate p, and output characteristics under different Intereaving factors s. The output characteristics of the Bernoulli (BR model) channel with statistical independent errors under the above speech coding are also studied. It is found that the two channel models have the same output signal-to-noise ratio under the conditions of lower average channel bit error rate.