Journal of Systems Engineering and Electronics ›› 2009, Vol. 20 ›› Issue (5): 948-953.
• ELECTRONICS TECHNOLOGY •
Xu Ying1, Wang Ju2 & Wu Siliang2
P code direct acquisition is an important technology in satellite navigation system. As the P code has a long period, it is hard to directly acquire. The traditional average method can process multiple code phases in a time to shorten the acquisition time. But with the increase of average phase error of the input signal and the local code, the correlation signal-to-noise ratio (SNR) loss increases. To reduce the SNR loss, an improved average method is introduced. A new sequence is generated with a summation of phase shifting sequences to decrease correlation peak loss. Simulation results show that compared with direct average method, the improved average method effectively increases correlation SNR.
Xu Ying, Wang Ju & Wu Siliang. Improved direct P code acquisition technique[J]. Journal of Systems Engineering and Electronics, 2009, 20(5): 948-953.
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