摘要
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 Markov digital channel model (GE model) is used for the channel model in digital mobile communication. The statistical characterization of burst error for this model is analyzed. The performance of the speech signal output under the condition of channel different average bit error rates p and the channel outputby the use different interleaving factors s with speech coding methods--the CCITTstandard PCM with the bit rate of 64kb/s and ADPCM with the rate of 32kb/s, are calculated. For a comparison, the output performance of the Bernoulli model (BR model) with the statiatic independent error characterization under the condition of the above mentioned speech coding, is studied. The two channel model have similar SNR performance in their output speech signals with the above speech coding method under coditions of lower channel average bit error rates.
出处
《北京理工大学学报》
EI
CAS
CSCD
1992年第3期43-48,共6页
Transactions of Beijing Institute of Technology
基金
国家自然科学基金
关键词
信道模型
语音编码
数字移动通信
channel model
voice coding / digital mobile communication
error correcting coding
