Rician信道下基于双门限的能量检测性能分析

针对认知无线电频谱检测中无线传输环境的复杂性,选用Rician信道模拟信号传输过程中的多径衰落,使用双门限能量检测算法减少噪声不确定性的影响。提出一种Rician信道下基于双门限的能量检测算法,推导了检测概率公式,并定义了误检概率来量化系统检测误差的大小。仿真分析了Rician信道下信噪比和因子K的变化对能量检测性能的影响,并通过仿真表明双门限算法较传统单门限算法,能够有效降低系统进行能量检测的误检概率。

Performance Analysis of Energy Detection Based on Double Threshold over Rician Channel

In view of the complexity of wireless transmission environment of spectrum detection in cognitive radio,this paper uses Rician channel to simulate multipath fading in the transmission process,and uses double-threshold energy detection algorithm to reduce the effect of noise uncertainty.In this paper,a scheme of double-threshold energy detection based on Rician channel is proposed,the formula of detection probability is derived,and the error detection probability is defined to quantize system＇s error detection.The energy detection performance over SNR and Kin Rician channel is analyzed through matlab simulation.The simulation results show that the error detection probability can be effectively reduced by using double-threshold energy detection algorithm.