【摘要】 无线通信信道时变多径的传输特性严重影响了传输系统的性能,必须采取有效的措施来对抗信道衰落。分集接收技术成本低廉,性能优越,在无线通信技术中广泛使用,是对抗无线信道衰落最有效的技术之一。文中详细地叙述了分集接收合并的原理,给出了严密的数学公式,通过理论推导,研究了三种合并技术(最大合并比MRC、选择合并SC、等增益合并EGC)的误码率和合并增益,仿真并分析了其在瑞利衰落信道下的性能,为实际应用提供参考。更多还原

【Abstract】 Wireless communication channel characterizes by the features of time-varying and multi-path fading which have seriously affected performance of the transmission system,thus effective measures must be taken to counter the fading of the signal. The low-cost and high-performance diversity combing technique is one of the most effective traditional techniques for the wireless communication technology,which is widely used in the wireless communication technology. This paper detailed describes the diversity combining receiver principle,and gives out the strict mathematical formula. Through the theoretical derivation of three combination technique( MRC,SC and EGC) bit error rate( BER) and combined gain,the paper also presents the simulation and analysis of the performance in the Rayleigh fading channel.更多还原