非白高斯噪声中基于导频的匹配滤波频谱检测  

Matched filtering spectrum detection based on pilot in non-white Gaussian noise

作　　者：包亚萍[1] 居清[1] 

机构地区：[1]南京工业大学信息与工程学院,江苏南京211816

出　　处：《电子技术应用》2011年第2期106-109,共4页Application of Electronic Technique

摘　　要：为了在低信噪比的情况下,能够用很少的采样样本得到很高的检测概率,考虑到现实生活中噪声和信号在传输过程中的衰落,所以在非白高斯信道中采用线性模型对信号进行估计,在此基础上对导频运用匹配滤波检测,讨论了决定检测概率的重要因素——偏移系数的最大值的选取。仿真结果表明,选取非白高斯噪声信道是必要的;偏移系数选取最优值将会得到很好的检测性能;对导频进行检测可以减少采样数。The sample can be fewer with a high detection probability when the SNR is low. And taking into account the noise in real life and signal transmission in the decline, firstly,signal is estimated in non-white Gaussian channel with line model; sec- ondly, matched filtering spectrum detection based on pilot. On this basis, an important factor is discussed in the decision probabili- ty of detection - the maximum offset coefficient selection. Computer sinmlation results show that select the non-white Gaussian noise channel is necessary, offset coefficient select the maximum detection performance will be good, and the number of samples can be reduced by detecting on pilot.

关 键 词：认知无线电 频谱检测 非白高斯噪声 匹配滤波检测 线性模型 偏移系数 

分 类 号：TN92[电子电信—通信与信息系统]