数据采集与处理2012，Vol.27Issue(1)：38-44,7.
不同相干积分方法对GPS弱信号捕获的影响
Effect of Different Noncoherent Integration Alternatives on Weak GPS Signal Acquisition
张文 1饶谷音 1韩松来 1袁保伦1
作者信息
- 1. 国防科学技术大学光电科学与工程学院,长沙,410073
- 折叠
摘要
Abstract
Unaided acquisition of weak GPS signals requires both long coherent integration time and a great amount of noncoherent integration operations. The unknown navigation data bits and bit edges should also be considered. From the point of noncoherent integration of unaided weak GPS signal acquisition method, a new alternative is proposed. Besides the new one, four different noncoherent integration alternatives are introduced. They use different approaches to compute the noncoherent integration at each step to reduce calculation and save memory space. Under the same coherent integration time, the same noncoherent integration operation number and the same navigation data bit edge number, with different carrier-to-noise ratio, Monte Carlo method is applied to verify the probability of detection and the results of the four alternatives are compared.关键词
GPS/信号捕获/弱信号/非相干积分/捕获概率Key words
GPS/ signal acquisition/ weak signal/ noncoherent integration/ probability of detection分类
天文与地球科学引用本文复制引用
张文,饶谷音,韩松来,袁保伦..不同相干积分方法对GPS弱信号捕获的影响[J].数据采集与处理,2012,27(1):38-44,7.
