摘要
针对长序列伪码捕获的特点要求,对传统的序列估计伪码捕获方法进行改进,提出了差分序列估计伪码捕获算法和FFT频率校正技术相结合的方法作为长伪码的捕获方案,对其工作原理进行了分析和理论推导.仿真结果表明,在高斯白噪声的情况下,该方法在捕获长序列伪码时的性能与传统的序列估计法相比较,在较低信噪比的情况下有较大提高,并能适应10 kHz范围的多普勒频移环境.
Pseudo noise code acquisition algorithms are the core algorithms in spread-spectrum communication. The long PN code acquisition algorithms is the hot research point. We simply introduce their principle and advance a method which combines with differential sequential acquisition algorithm and FFT frequency adjustment algorithm. The simulation result indicates that the method is better than some traditional methods in the field of high dynamic environment and long pseudo noise code sequence in some way.
出处
《江南大学学报（自然科学版）》
CAS
2007年第2期212-215,共4页
Joural of Jiangnan University (Natural Science Edition)
关键词
码捕获
序列估计法
FFT校频
扩频通信
PN code acquisition
sequential acquisition algorithm
FFT frequency adjustment
spread-spectrum communication
