摘要
研究了短波OFDM调制下多天线分集合并接收技术。针对短波信道存在多径干扰、深衰落、多普勒频移等特点,采用ITU-R建议的中纬度恶劣信道条件下的短波信道参数,应用短波Watterson信道模型,运用最大比值合并的多天线分集合并算法,进行了短波OFDM系统下误码率性能仿真。仿真结果表明:设计的算法,在不加大发射功率的情况下,有效地降低了OFDM系统的误码率,减轻了信道衰落的影响,提高了通信的可靠性。
The multi-antenna diversity reception technology in HF OFDM is investigated.Considering the characters of HF channel,such as multipath,deep fading,Doppler frequency shift,the error-rate performance of the multi-antenna diversity algorithm based on maximal ratio in HF OFDM system is simulated.This Watterson model-based simulation makes use of HF channel parameters proposed by ITU-R for bad channel conditions.Simulation results show that this algorithm could effectively reduce the bit error rate of OFDM system,and improve the communication reliability.
出处
《通信技术》
2011年第10期7-9,共3页
Communications Technology
