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	Direct GPS P-code acquisition method based on FFT
	Li Hong ; Lu Mingquan ; Feng Zhenming
	2010-05-06 ; 2010-05-06
关键词	Practical Theoretical or Mathematical/ codes data acquisition fast Fourier transforms frequency-domain analysis Global Positioning System jamming time-domain analysis/ direct GPS P-code acquisition method FFT antijamming antispoofing capabilities receivers block searches carrier frequency offsets search code phases cells resolution time domains frequency domains code phase slip problem detection probability carrier-to-noise density ratios predetection integration time coherent integrations analysis Global Positioning Systems/ B6250G Satellite communication systems B6330 Radionavigation and direction finding B6120B Codes B0230 Integral transforms
中文摘要	Recently, direct acquisition of GPS P-code has received considerable attention to enhance the anti-jamming and anti-spoofing capabilities of GPS receivers. This paper describes a P-code acquisition method that uses block searches with large-scale FFT to search code phases and carrier frequency offsets in parallel. To limit memory use, especially when implemented in hardware, only the largest correlation result with its position information was preserved after searching a block of resolution cells in both the time and frequency domains. A second search was used to solve the code phase slip problem induced by the code frequency offset. Simulation results demonstrate that the probability of detection is above 0.99 for carrier-to- noise density ratios in excess of 40 dB- Hz when the predetection integration time is 0.8 ms and 6 noncoherent integrations are used in the analysis.
语种	英语 ; 英语
出版者	Tsinghua University Press ; China
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/10611]
专题	清华大学
推荐引用方式 GB/T 7714	Li Hong,Lu Mingquan,Feng Zhenming. Direct GPS P-code acquisition method based on FFT[J],2010, 2010.
APA	Li Hong,Lu Mingquan,&Feng Zhenming.(2010).Direct GPS P-code acquisition method based on FFT..
MLA	Li Hong,et al."Direct GPS P-code acquisition method based on FFT".(2010).

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