摘要
瑞利衰落存在于通信系统中,对信号的传输有一定的影响。随着衰落对信号影响的改变,固定门限捕获算法的虚警概率也在改变。文章针对虚警概率的改变提出了一种基于自适应门限的相关捕获算法。门限的设计就是计算相关运算前的信号平均能量再乘上系数k作为门限,在噪声干扰不同的情况下使虚警概率恒定不变,即不受噪声的干扰。通过仿真验证了该方法的有效性。
Rayleigh fading exists in communication system, which has a certain effect on the transmission of signals. With the change of the fading effect on signal, the false-alarm probability of fixed threshold capture algorithm is also changing. Aiming at the change of false alarm probability, the paper presents a related capture algorithm based on adaptive threshold. Threshold designing is to make calculation of the average energy of the signal prior to operation and then multiply the coefficient k, keeping the false-alarm probability constant under the condition of different noise turbulence, i.e. make it away from the interference of noise. The effectiveness of the proposed method is validated by computer simulation.
出处
《通信电源技术》
2015年第6期165-166,170,共3页
Telecom Power Technology
关键词
瑞利衰落
能量
自适应门限
Rayleigh fading energy adaptive threshold
