摘要
本文针对传统的频率-码相位二维串行搜索捕获方法计算量大、且捕获时间长的缺点提出基于FFT的频域并行捕获PN码算法。该并行算法对频率搜索方法进行了改进,并提出了一种消除数据调制的方法。理论分析和仿真结果表明该方法能实现低信噪比、高动态性条件下PN码的快速捕获。
Conventional frequency-phase two dimensions serial acquisition method is analyzed,a new fast acquisition method based on FFT is presented to solve shortcomings of the conventional method.The parallel acquisition method improves frequency scan method and presents a method to remove data modulation。Theory analysis and simulation results have proven the method can realize fast acquisition of PN code under the low SNR and high dynamic conditions.
出处
《黑龙江科技信息》
2013年第17期134-135,197,共3页
Heilongjiang Science and Technology Information
关键词
扩频
并行捕获
FFT
卷积
二维搜索
Spectrum spread
Parallel acquisition
FFT
Convolution
Two-dimension search
