Abstract—In this paper, a new PRN code optimal design based on unequal-length code modulation is proposed. The better performance of code acquisition in weak signals will be achieved by using this method, because the cross-correlations between different signals have been sliding, thus suppressing multiple access interference effectively. Theoretical analysis and simulation show that this design has predictive power for compressing multi-access interference. Meanwhile, it does not need extra acquisition effort, thus it is convenient, feasible and effective

Index Terms—GNSS, acquisition performance, weak signal environment, PN code

Cite:Zhang Xiang-li, Hu Xiu-lin, and Tang Zu-ping, "Unequal Code-Length Code Structure for Better Acquisition Performance in Weak Signal Environment," Journal of Communications, vol. 8, no. 3, pp. 184-191, 2013. Doi: 10.12720/jcm.8.3.184-191