摘要
为了克服现有通信技术中在低信噪比情况下计算复杂度高、误码性能差的缺陷,提出了一种改进型的OFDM通信系统,在Simulink仿真平台中设计了完整的通信系统模型,模拟了多径瑞利衰落信道与加性高斯白噪声信道的OFDM通信完整过程,实验结果表明,改进型的OFDM通信系统对信噪比要求不高,降低了OFDM通信系统中所存在的高峰均比问题,能有效地消除信号多径传播所造成符号干扰并且误码率较低。
In order to overcome the existing communication technology under the condition of low SNR in high computational complexity error performance of defects, an improved OFDM communications system is proposed and a complete communication system model in Simulink is designed, to simulate the multipath Rayleigh fading channel with additive white gaussian noise channel of OFDM communication complete process, the results show that the improved OFDM communication systems on signal-to-noise ratio is not high,reducing the OFDM communication system in the high PAR problem, effectively eliminating the signal interference caused by multipath propagation symbol and Lower error rate.
出处
《商洛学院学报》
2014年第6期28-32,51,共6页
Journal of Shangluo University
基金
商洛学院科研基金项目(14SKY001)
关键词
正交频分复用
移动通信
多径效应
SIMULINK
orthogonal frequency division multiplexing
mobile communication
multipath effect
Simulink
