Journal of Systems Engineering and Electronics ›› 2011, Vol. 33 ›› Issue (2): 366-369.doi: 10.3969/j.issn.1001-506X.2011.02.27
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ZHANG Min-hu, REN Zhang, HUA Chun-hong
Online:
Published:
Abstract:
Based on the influence analysis of weak GPS signals on acquisition under high dynamic environment, a fast acquisition algorithm is developed. The involvement of the inertial navigation system is applied to estimate the GPS carrier Doppler frequency so as to decrease the range of frequency uncertainty. By improving the acquisition method of coherent and non-coherent integration based on fast Fourier transform (FFT), it overcomes the energy diffusion caused by the data bit sync and Doppler rate. In addition, the acquisition time is reduced and its sensitivity is enhanced. Simulation results illustrate that the proposed algorithm is valid to 24 dB-Hz carrier tonoise (CNR) GPS signal acquisition within 300 ms.
CLC Number:
V 249
ZHANG Min-hu, REN Zhang, HUA Chun-hong. Fast acquisition of high-dynamic and weak GPS signals aided by inertial information[J]. Journal of Systems Engineering and Electronics, 2011, 33(2): 366-369.
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URL: https://www.sys-ele.com/EN/10.3969/j.issn.1001-506X.2011.02.27
https://www.sys-ele.com/EN/Y2011/V33/I2/366