Title :
Design of a GPS receiver for the linear frequency modulation interference suppression
Author :
Youguo, Hou ; Wei, Guo ; Xinshan, Li
Author_Institution :
Nat. Key Lab. of Commun., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
The linear frequency modulation (LFM) interference is different from the normal wideband and narrowband interferences. They have clear time-frequency signatures that are distinct from the GPS C/A spread spectrum code. The GPS signals are very weak and easily interfered. It is difficult to mitigate the LFM interferences in the GPS signals only in the time or frequency domain. In this paper, a new time-frequency tool based on the fractional Fourier transform (FRFT) is proposed to cancel the LFM interference which has clear time-frequency signatures. Finally, the simulation results show that this method is valid.
Keywords :
Fourier transforms; Global Positioning System; frequency modulation; interference suppression; linear codes; modulation coding; radio receivers; spread spectrum communication; time-frequency analysis; FRFT; GPS C/A spread spectrum code; GPS receiver design; LFM interference mitigation; fractional Fourier transform; frequency-domain analysis; linear frequency modulation interference suppression; narrowband interference; normal wideband interference; time-domain analysis; time-frequency signature tool; Chirp modulation; Fourier transforms; Frequency domain analysis; Global Positioning System; Interference cancellation; Interference suppression; Narrowband; Spread spectrum communication; Time frequency analysis; Wideband;
Conference_Titel :
Communications, Circuits and Systems, 2009. ICCCAS 2009. International Conference on
Conference_Location :
Milpitas, CA
Print_ISBN :
978-1-4244-4886-9
Electronic_ISBN :
978-1-4244-4888-3
DOI :
10.1109/ICCCAS.2009.5250504
