Journal of University of Chinese Academy of Sciences >
An algorithm for CAPS signal acquisition and synthesis with dual-linear polarized antennas
Received date: 2014-11-27
Revised date: 2015-05-13
Online published: 2015-11-15
Supported by
Supported by the Key Research Programs of Chinese Academy of Sciences (KGFZD-125-14-005-2, KJCX2-EW-J01) and the Knowledge Innovation Program of Chinese Academy of Sciences (KGCX2-EW-407-1)
A polarization loss of 3 dB is caused by circular polarized antenna when receiving the linear polarized signal in China area positioning system (CAPS). This work proposes to use dual-linear polarized antenna to receive CAPS signal and accordingly develops a signal acquisition and synthesis algorithm. The algorithm first performs signal acquisition with the dual-linear polarization antenna channels. According to the acquisition results the algorithm then synchronizes the signals. After the synchronization, it sums the signals from the two channels using the maximal-SNR (signal-to-noise ratio) combination. The algorithm is verified by its application to an experimental receiver. By analyzing the CAPS data acquired by the experimental receiver, it is found that the SNR of the synthesized signal increases by about 1.5 dB over the one-channel signals.
GAN Tong , WANG Xiaolan , MA Guanyi . An algorithm for CAPS signal acquisition and synthesis with dual-linear polarized antennas[J]. Journal of University of Chinese Academy of Sciences, 2015 , 32(6) : 803 -806 . DOI: 10.7523/j.issn.2095-6134.2015.06.012
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