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.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
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)
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
pseudonoise-code acquisition
locally optimum detection
weakly dependent noise
non-Gaussian impulsive channel
detection probability
