【摘要】 PN码的快速捕获是设计直接序列扩频接收机的关键技术之一。对于无限长的输入序列,采用了基于分段相关的快速捕获算法。分段相关采用重叠保留法,用FFT实现每块的相关运算。在Matlab环境下验证了本算法可以在低信噪比及高动态环境下实现PN码的快速捕获。更多还原

【Abstract】 A key technology in the design of direct-sequence spread-spectrum(DSSS) receivers is the fast acquisition pseudo-noise(PN) code.For the input signal is indefinite duration,a fast acquisition algorithm based on the block correlation is proposed in this paper.The block correlation procedure used in this paper is overlap-save method.The correlation of each block was implemented using the FFT.The Simulation result shows the algorithm is able to capture PN code fast in the presence of high dynamic under the conditions of low SNR.更多还原