Phase Acquisition Method of Address Code Based on Logistic-Map and Neural Network 基于Logistic函数映射与神经网络的地址码相位捕捉检测方法
The design adopts fast acquisition algorithm method of FFT PN code based on coherent and incoherent integration according to the goal and constraint. 通过对这些算法的研究,在自己要设计的捕获模块的指标的约束下确定了要采用的捕获方法,即基于相干积分与非相干积分结合的FFT伪码快速捕获方法。
The result of Matlab simulation shows that the new acquisition method can tolerate larger frequency dynamic range and can rapidly finish code acquisition under lower SNR. Matlab系统仿真结果表明,新的捕获方法可以容忍校正更大的频率动态范围,在较低信噪比下快速完成码捕获功能。
The paper presents a spread spectrum signal acquisition speed sliding correlation method base on FPGA, to address the problem of capture long PN code under low SNR. 文中提出了一种基于FPGA的扩频信号快速滑动相关捕获方法,来解决低信噪比条件下长伪码序列的捕获问题。
A new code acquisition method based on phase difference correction of FFT is presented to solve the problem of long code acquisition time in high dynamic DSSS receivers having large frequency offset. 针对大频偏下高动态直扩接收机伪码捕获时间长的问题,提出了一种新的基于FFT相位精确估计频偏的改进方法。