A New High-Sensitivity Acquisition Method of Software GPS Receiver Based on Ingenious Differentially Coherent Integration
A New High-Sensitivity Acquisition Method of Software GPS Receiver Based on Ingenious Differentially Coherent Integration
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作者：
Tang Bin
针对典型的高灵敏度捕获方法采用非相干积累获得高捕获性能，非相干积累会产生平方损耗的问题，提出了一种基于巧妙差分相干积累的软件GPS接收机高灵敏度捕获方法。推导了巧妙差分相干积累和非相干积累检测量的统计分布。推导了新算法的虚警概率和检测概率的计算方法，实验结果表明，新算法比非相干积累算法具有更好的性能，可以在400 ms内捕获-192dBW以下的信号。
The typical high-sensitivity acquisition gets high performance by non-coherent integration,but non-coherent integration will produce square loss.According to the practical application background,a new and high-sensitivity acquisition method of software GPS receiver is proposed based on ingenious differentially coherent integration.The theory of signal acquisition in a GPS receiver is introduced. Statistic distribution of detection quantity of ingenious differentially coherent integration and non-coherent integration are deduced. The compute methods of probability of false alarm and probability of detection in the new algorithm are deduced.Experimental results show that the new algorithm has better performance than non-coherent integration,and can acquire signals below-192dBW in 400ms.