通信学报2012，Vol.33Issue(4)：183-190,8.
优化的PFA算法在GPS软件接收机中的应用
Optimized PFA algorithm in GPS software receiver
摘要
Abstract
According to the specific storage mode of GPS data, a novel algorithm using 2-bit to quantitate the GPS data and the local carrier signal was proposed, and the baseband-mixing operation was transformed into bit-wise calculation, then the result was set as the input data of PFA algorithm. Part of the twiddle factors were pre-stored as 16-bit complement integer, and the whole factors were generated by mapping strategy when used. So all the floating-point calculations were transformed into integer operations. Experimental results show that this method has improved the efficiency of the PFA algorithm significantly, and the acquisition time were reduced effectively.关键词
2bit量化/整数运算/旋转因子表/比特移位/PFAKey words
2bit quantization/ integer arithmetic/ twiddle factors table/ bit-shifting/ PFA分类
信息技术与安全科学引用本文复制引用
姚相振,崔绍龙,方金云..优化的PFA算法在GPS软件接收机中的应用[J].通信学报,2012,33(4):183-190,8.基金项目
国家高技术研究发展计划("863"计划)基金资助项目(2009AA12Z315) （"863"计划）
