MIMO-OFDM中OSIC检测算法的研究与仿真

摘要

MIMO是一种用于无线通信的天线技术,利用多天线来抑制信道衰落,在不增加带宽和天线发射功率的情况下,成倍提高无线通信系统的信道容量,降低误码率.正交频分复用(OFDM)技术能够有效对抗多径传播引起的频率选择性衰落.MIMO和OFDM相结合,充分发挥了二者优势,是下一代宽带无线通信的核心技术,其接收机检测技术的优劣和复杂度将直接影响通信系统的质量和应用前景.因此,首先分析MIMO系统的原理和构造,其次介绍OFDM系统模型,最后研究MIMO系统中的OSIC信号检测算法,并对其性能进行研究与仿真.%MIMO, as an antenna technology for wireless communication, uses multiple antennas to suppress channel fading, and without increasing the bandwidth and antenna transmit power, exponentially increase channel capacity of the wireless communication system and reduce the error rate. OFDM (Orthogonal Frequency Division Multiplexing) technology could effectively resist frequency selective fading due to multipath propagation. The combination of MIMO and OFDM could give full play to the advantages of these two technologies, and would become the core technique of next-generation broadband wireless communication. And the merits and complexities of its receiver detection technology would directly affect the quality and application of communication system. This paper firstly analyzes the principle and structure of MIMO system, then describes the OFDM system model, and finally expounds the OSIC signal detection algorithm in MIMO system, and discusses its performance and simulation.