摘要
同步的实现是直扩系统中一个关键问题,目前对PN码同步的研究主要集中在如何实现快速捕获的问题.以前主要采用串行捕获方法,这种方法实现简单,但捕获速度不能满足要求,而现在大规模集成电路的应用使并行捕获方法成为可能,捕获速度快,但系统的复杂度很高.基于此,本文提出一种混合捕获方法,可实现PN码捕获的时间性能与系统复杂度的折衷.最后通过MAX+Plus仿真和FPGA硬件平台测试,验证了方案的可行性.
The synchronization is one of the critical issues concerning the direct-sequence spread spectrum system. The technical efforts in current research for code synchronization are mainly focused on the implementation of quick acquisition. The conventional approaches regarding this respect are characterized in serial acquisition that is found to be simple for implementation, but cannot meet the real-time requirement set for the acquisition rate. The application of large-scale integrated circuit, on the other hand, makes the parallel acquisition possible. The parallel acquisition features quick acquisition rate but lacks the system simplicity. The paper proposes a combined acquisition method that functions as an optimal trade-off between acquisition rate and system complexity. The MAX＋Plus emulation and testing of FPGA hardware platform prove the feasibility of the proposed approach.
出处
《宁波大学学报（理工版）》
CAS
2006年第2期161-165,共5页
Journal of Ningbo University：Natural Science and Engineering Edition
基金
国家自然科学基金(60372026)
关键词
同步
混合捕获
直接序列扩频
PN码
FPGA
synchronization
mixed acquisition
PN
direct-sequence spread spectrum
FPGA
