有色噪声背景下陆基导航接收机对信号的检测  

Signal Detection of the Onshore Radio Navigation Receiver in Colored Noise

作　　者：刘楠[1] 杨莘元[1] 

机构地区：[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001

出　　处：《计算机仿真》2007年第7期316-318,346,共4页Computer Simulation

摘　　要：针对我国典型海域干扰噪声的特点,提出了在有色噪声背景下直接序列扩频体制的无线电导航接收机对接收信号检测方法,即利用卡尔曼滤波技术对接收的信号进行建模从而得出自相关函数,根据单层神经网络对相关函数中的有色噪声协方差参数进行预测。同时,给出了系统的递推公式、预测自相关函数表达式、程序流程图和计算机仿真。计算机仿真结果表明,该方法不仅能够有效的逼近有色噪声,而且程序计算复杂度较低,从而提高了系统的稳定性。A method of signal detection is presented which introduces the direct sequence frequency spreading technique in colored noise. An observation autocorrelation based algorithm is suggested to estimate the variance pa- rameter of the measurement noise by using a single layer neural network. The recursion formulas, the autocorrelation predictive functional expression and the flow chart are given. The simulation results show that the method of signal detection is able to approximate the colored noise in low complexity and has good performance.

关 键 词：有色噪声 卡尔曼滤波 神经网络 自相关函数 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]