摘要
研究了MIMO-OFDM系统在频率选择性衰落信道下的系统模型,推导了使用等功率分配时的信道容量,得出了各态历经容量的一个紧密下界。分析了天线数目、接收信噪比及选择性衰落分集对信道容量的影响。通过仿真表明,MIMO-OFDM系统信道容量主要由天线数目和平均接收信噪比决定,随着天线数目或信噪比的增加而增大。
This paper deals with the MIMO-OFDM system model over frequency-selective fading channels. The channel capacity is derived based on the average power allocation policy, and a lower bound of the ergodic capacity is introduced. Then the influence of various parameters （numbers of antennas, average received SNR and selective-fading diversity） on ergodic capacity is analyzed. The simulation results indicate that the channel capacity of MIMO-OFDM system grows with the numbers of antennas and average received SNR, which are key parameters in determining the capacity.
出处
《通信技术》
2008年第4期22-24,27,共4页
Communications Technology
基金
国家自然科学基金资助项目(60572156)
