摘要
多输入多输出(MIMO)通信系统相比其他的通信系统具有更高的频谱效率,在不增加发射功率以及信号带宽的情况下,MIMO技术可以有效地提高系统信道容量及其性能。利用均匀角能量分布以及相关矩阵,分析了相关信道下的MIMO系统信道容量,得出了系统信道容量的通用公式,并利用MATLAB进行仿真。仿真结果表明,相关性的增加意味着信噪比的减小,圆形接收天线阵列半径与角度扩展是决定MIMO系统信道容量的主要因素。
Multiple-input multiple output（MIMO） communication architecture,as compared with conventional techniques,has even higher spectral efficiency,and MIMO technique could greatly improve channel capacity and performance of the system without any increase of transmitting power and bandwidth.By uniform angular distribution and the correlation matrix,the MIMO channel capacity in correlated channel is investigated.Numerical simulation is performed with MATLAB,thus to verify the proposed formula.Simulation result indicates that,for this model, the increase of correlation means the reduction of signal-to-noise ratio（SNR）,and the circular receive antenna array radius or angle spread is the dominating factor for channel capacity.
出处
《通信技术》
2011年第3期132-135,共4页
Communications Technology
基金
江苏省高校自然科学基金--超宽带信道模型及其信道编码研究(NO.08KJB510009)
