摘要
采用聂孟-皮尔逊准则,以发现概率为性能指标,对基于FFT非相干累加的GPS信号捕获算法的性能进行了详细的理论推导,给出了该种方法的理论性能上界,提出了一种用于快速捕获的高效自适应算法,并通过系统仿真对理论结果进行了验证.对实际情况中概率分布的合理近似使理论分析过程得以简化,并使判决门限可根据噪声方差及累加次数进行自适应调整的算法可以直接应用于实时GPS接收机的设计.
An efficient adaptive algorithm for a non-coherent fast acquisition of the Global Positioning System （GPS） signals is presented. The theoretical performance derivation is performed by reasonable approximation of the probability density function of the detection variables. The proposed algorithm shows a good performance in terms of the detection probability as confirmed by simulations. The efficiency of the algorithm makes it a good candidate for practical implementation in real time GPS receivers.
出处
《电子器件》
CAS
2007年第3期1024-1027,共4页
Chinese Journal of Electron Devices
基金
国家自然科学基金项目资助(60425413)
