一种改进的非相干序贯检测捕获方案

为实现伪码的快速捕获 ,提出了一种基于连续累加的非相干序贯检测判决逻辑 ,同时给出了一种估算连续积分 /累加序贯检测逻辑的采样数的概率分布密度和平均采样数上限 ASN(Average Sample Number)的算法。仿真结果表明 ,连续累加非相干序贯检逻辑达到了预期的虚警概率和检测概率 ,且性能优于传统序贯检测 ,证明了检测逻辑的正确性和可用性。此方案可以为扩频通信系统中如何解决伪码捕获这一问题提供新的思路和方法

An Acquisition Scheme with Modified Non-coherent Sequential Detection

In order to achieve fast PN (Psuedo Noise)code acquisition,a modified non coherent sequential detection decision logic based on continuous accumulation is proposed.Simultaneously,an algorithm is also provided,which can estimate both the probability density function(pdf)and the upper bonds of ASN.In addition,all kind of properties is more robust to others'.Anticipative probability of false alarm and detection,as well as faster PN code acquisition compared to conventional sequential detection can be achieved by employing this structure.The correctness and advantage of the scheme have also been verified by computer simulation.It can also provide a new way or approach for the spread spectrum communication system.