摘要
多输入多输出正交频分复用系统(MIMO-OFDM)结合MIMO系统和OFDM系统,既有高速大容量信号传输特性,又具有较好的抗多径信道衰落的能力。该文在介绍MIMO-OFDM系统模型及信号特性的基础上,引入最小均方最小均方误差(MMSE)算法进行信号检测,并在算法的应用中对算法实现MIMO-OFDM信号检测的原理以及信道衰落对信号的失真影响进行分析。最后在三种典型的信道环境下对迫零(ZF)算法、MMSE算法的误码率性能进行仿真对比,仿真结果显示,MMSE算法具有较好的抗噪声和抗多径信道衰落能力,可作为MIMO-OFDM信号检测的优选方案。
The multiple-input multiple-output orthogonal frequency division multiplexing system(MIMO-OFDM) combines the MIMO system and the OFDM system, which not only has the characteristics of high-speed and large-capacity signal transmission, but also has a good ability to resist multipath channel fading. In this paper, on the basis of introducing the MIMO-OFDM system model and signal characteristics, the minimum mean square minimum mean square error(MMSE) algorithm is introduced for signal detection, and the principle of MIMO-OFDM signal detection and channel fading are discussed in the application of the algorithm. Analyze the effect of distortion on the signal. Finally, the bit error rate performance of the zero-forcing(ZF) algorithm and the MMSE algorithm are simulated and compared in three typical channel environments. The simulation results show that the MMSE algorithm has better anti-noise and anti-multipath channel fading capabilities, and can be used as a The preferred solution for MIMO-OFDM signal detection.
作者
朱岩
余治民
Zhu Yan;Yu Zhi-min(China Airborne Missile Academy,Henan Luoyang 471009;The First PLA's Military Representative Office in Luoyang Area,Henan Luoyang 471009)
出处
《电子质量》
2022年第4期5-10,共6页
Electronics Quality
