衰落信道上TAS/MRC的错误指数

doi:10.11959/j.issn.1000-0801.2016119

摘要/Abstract

摘要：

使用梅哲-G 函数，推导了Nakagami-m 衰落发射天线选择（TAS）/最大比合并（MRC）系统的随机编码错误指数（RCEE）、遍历容量、截止速率、删改指数的精确表达式。计算结果表明，Nakagami-m衰落TAS/MRC系统的错误指数与信道衰落参数、信道编码速率、收发天线数目、信道相干时间等因素有关。信道衰落系数越大、编码速率越大、收发天线数目越多，通信系统的RCEE越大，相应的译码错误概率越小，系统的通信可靠性越高。对于给定译码错误概率的MIMO无线通信系统，可以通过计算系统的RCEE来估计信道所需的编码长度、收发天线数目、信道相干时间和空间衰落相关时的编码需求。

关键词: Nakagami-m衰落信道, TAS/MRC技术, 随机编码错误指数, 遍历容量, 截止速率, 删改指数

Abstract:

Using Meijer-G function,exact expression for the random coding error exponent,ergodic capacity,cutoff rate,expurgated exponent of TAS/MRC Nakagami-m fading channel were derived.Numerical results show that the random coding error exponent is related to channel fading coefficient,coding rate,the number of transmitting and receiving antennas,and signal symbol period.With the coding rate,the number of the receiving and transmitting antennas and the average signal to noise ratio increasing,the RCEE of the system will become larger and the BER performance of the system will be better.For a given decoding error probability of a wireless communication system,necessary coding length,number of antennas,channel coherence time,and spatial fading correlation could be estimated by computing the random coding error exponent.

Key words: Nakagami-m fading channel, TAS/MRC technology, random coding error exponent, ergodic capacity, cutoff rate, expurgated exponent

李长水. 衰落信道上TAS/MRC的错误指数[J]. 电信科学, 2016, 32(5): 127-131.

Changshui LI. Error exponent for TAS/MRC fading channel[J]. Telecommunications Science, 2016, 32(5): 127-131.

图/表 4

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