具有同信道干扰的MIMO各态历经信道容量研究
首发时间:2007-11-01
摘要:本文考虑具有同信道干扰的MIMO各态历经信道容量问题。采用较为一般的Nakagami-m/Nakagami-m系统模型,由于数学处理上的困难,论文通过Monte Carlo仿真来分析MIMO系统的各态历经信道容量。仿真结果表明: (1)在总干扰功率一定时,干扰功率越均匀分布或者干扰天线数目越多各态历经信道容量将越少;(2)当总干扰噪声功率比趋近无穷时,各态历经信道容量将趋近常数,常数的取值与接收天线数与干扰天线总数取值有关;(3)衰落参数 的取值对信道容量的影响很小。此外,论文还通过Monte Carlo仿真观察信道容量在Nakagami-m和Rician两种信道模型下的近似程度。当 因子取值很小时,Nakagami-m和Rician两种信道模型下的近似程度很好;但当 因子取值很大时,二者的信道容量相差很大,则不存在近似关系。
关键词: 多入多出 Nakagami-m衰落信道 各态历经容量 同信道干扰
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MIMO Capacity with Co-Channel Interference and Noise
Abstract:This paper considers the MIMO ergodic capacity with co-channel interference. The channel we consider here is Nakagami-m flat fading channel with Nakagami-m co-channel interference, and we will analysis the result of the MIMO ergodic capacity by simulations because of the difficulty of the mathematical way. By simulation, we get: (1) given the fixed total interference power, the ergodic capacity decreases as the interference power is distributed equally, or the number of interference antennas increases. (2) with the increasing interference power, the ergodic capacity will asymptotically degenerate to a const, which depend on the amount of receive antennas and interference antennas.(3) The parameter m will be shown that it gives tiny effect on the ergodic capacity. At last, we will observes the extent of approximation between Nakagami-m fading and Rician fading channel, and we shall see that the Nakagami-m fading model and Rician fading model have a good approximate effect on ergodic capacity with a small K, but the difference between the two models grows larger as K increases, and the two models can not be equivalent with each other any more.
Keywords: Multiple-Input Multiple-output, Nakagami-m fading channel, ergodic capacity, co-channel interference
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No.1609315938611939****
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