一种弱相关非高斯信道下的伪码捕获方法  

Pseudonoise-code acquisition method in weakly dependent non-Gaussian impulsive channels

作　　者：沈锋[1] 孙枫[1] 薛冰[1] 

机构地区：[1]哈尔滨工程大学自动化学院,黑龙江哈尔滨150001

出　　处：《系统工程与电子技术》2009年第7期1568-1572,共5页Systems Engineering and Electronics

基　　金：国家自然科学基金资助课题(60704018)

摘　　要：针对弱相关非高斯噪声环境提出了一种伪码捕获方法,将伪码捕获等价为假设检验问题,将弱相关非高斯噪声建模为一阶滑动平均SαS噪声模型,利用局部最佳检测算法推导出弱相关非高斯噪声环境下的伪码捕获检测统计量,得到弱相关噪声模型下伪码二维捕获结构及其简化形式,进行了性能仿真并与传统的伪码捕获方法对比。仿真结果表明该捕获方法在相关非高斯噪声环境下检测性能有较大幅度的提高。The pseudonoise-code acquisition for direct-sequence spread-spectrum （DS/SS） systems in weak ly dependent non-Gaussian impulsive channels is considered. Modeling the acquisition problem as a hypothesis testing problem, a detector is derived for weakly dependent non Gaussian impulsive noises based on the locally optimum detection technique. Numerical results show that the proposed detector can offer an substantial per formance improvement over the conventional schemes in dependent non-Gaussian impulsive noise channels.

关 键 词：伪码捕获 局部最佳检测 弱相关噪声 非高斯信道 检测概率 

分 类 号：TN914.4[电子电信—通信与信息系统]