电讯技术2025，Vol.65Issue(11)：1903-1911,9.DOI:10.20079/j.issn.1001-893x.240429001
基于同步多普勒频率假设的低复杂度GNSS信号捕获方法
A Low-computation GNSS Acquisition Method Based on Synthesized Doppler Frequency Hypotheses
吴亿 1吴超 1钱飞杰 1林秀苇1
作者信息
- 1. 杭州电子科技大学 通信工程学院,杭州 310018
- 折叠
摘要
Abstract
To reduce the computations of parameters estimation in high-dynamic and long integration global navigation satellite system(GNSS)signal detection applications,the authors propose a low-computation GNSS acquisition method(LGAM)suitable for high-dynamic environment.The goal of LGAM is to apply the synthetic Doppler frequency hypothesis testing(SDHT)method to the acquisition of high dynamic GNSS signals with Doppler rate and bit flipping.Firstly,sparse Doppler frequency(SDF)process is implemented by coarse Doppler estimation,and post-correlation signal model is derived based on SDF structure.Then,in order to improve the detection efficiency of Doppler and Doppler rate,double-FFT based detection is proposed based on the post-correlation signal model for parameters estimation.The results demonstrate that in high dynamic environments,when the signal-to-noise ratio(SNR)is higher than-43 dB,the computational complexity based on FFT method is 15 times that of LGAM1 and 780 times that of LGAM2.关键词
GNSS/高动态环境/压缩捕获/频率参数估计Key words
GNSS/high-dynamic environment/compressed acquisition/frequency parameters estimation分类
信息技术与安全科学引用本文复制引用
吴亿,吴超,钱飞杰,林秀苇..基于同步多普勒频率假设的低复杂度GNSS信号捕获方法[J].电讯技术,2025,65(11):1903-1911,9.
