摘 要本文主要是基于天线块交织的 MIMO-OFDM 系统峰值功率优化方法的讨论。以正交频分复用为代表的多载波通信技术可以有效地对抗移动通信信道的诸多不利因素。OFDM 技术与 MIMO 技术相结合可以满足人们对宽带业务的要求，提高数据传输速率，增加频谱利用率。目前 OFDM 技术广泛应用于非对称数字用户环路（ADSL）、高清楚度电视（HDTV）信号传输、数字视频广播（DVB）、无线局域网（WLAN）等领域，MIMO-OFDM 技术也已广泛应用于 4G 中，极大推动无线移动通信技术的进展。MIMO-OFDM 系统同样存在 PAPR 过高的问题，会使信号波形产生畸变，以致降低整个系统的传输性能和可靠性。对于 MIMO-OFDM 系统，多天线是主要特点，尝试将块交织与多天线特点相结合来改善系统的峰值功率问题。在讨论此优化方法时，首先先建立原始和优化后的 MIMO-OFDM 系统框图，然后对其每个模块进行 MATLAB 仿真，不断重复实验，从而得到两种情况下 PAPR 统计值。为了准确评估 PAPR 性能，可以借助互补累积分布函数 CCDF。通过仿真图像，我们能很直观清楚看到多天线块交织方法可以很好地改善 MIMO-OFDM 系统的PAPR 性能。关键词：多输入多输出正交频分复用；多天线块交织；正交频分复用；峰值功率比ABSTRACTIn this paper, a peak power optimization method based on the antenna block interleaving in MIMO-OFDM system is introduced. As one of multicarrier communication techniques, orthogonal Frequency Division Multiplexing can effectively resist many unfavorable factors in mobile communication channel. The combination of OFDM and MIMO can meet people's demands for broadband services, higher data rates and increased spectral efficiency. OFDM technology is currently widely used in Asymmetric Digital Subscriber Line (ADSL), high definition television (HDTV) signal transmission, digital video broadcasting (DVB), wireless local area network (WLAN) and so on. MIMO-OFDM technology has been widely used in 4G, and greatly promoted the development of wireless mobile communication technology. In MIMO-OFDM system, the problem of high PAPR also exists, which ...
