收稿日期: 2014-11-27
修回日期: 2015-05-13
网络出版日期: 2015-11-15
基金资助
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)
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)
甘彤 , 王晓岚 , 马冠一 . 双线性极化天线的CAPS信号合成捕获算法[J]. 中国科学院大学学报, 2015 , 32(6) : 803 -806 . DOI: 10.7523/j.issn.2095-6134.2015.06.012
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.
[1] Ai G X, Shi H L, Wu H T, et al. A positioning system based on communication satellites and the Chinese area positioning system (CAPS)[J]. Chinese Journal of Astronomy and Astrophsis, 2008,38(6):611-635.
[2] Ai G X, Shi H L, Wu H T, et al. The principle of the positioning system based on communication satellites[J]. Chinese Journal of Astronomy and Astrophsis,2008,38(12):1 615-1 633.
[3] Li L. Antenna and radio wave propagation[M]. Beijing:Science press, 2009(in Chinese).
[4] Wang D P, Chen H H, He M. Research on polarization matching and polarization tracking about satcom on move received antenna system[J]. Modern Electronic Technique, 2009,32(12):103-105.
[5] Theodore S Rappaport. Wireless communications:principles and practice[M]. Prentice Hall PTR Prentice-Hall, Inc. Upper Saddle River, NJ07458,2002.
[6] Tse D, Viswanath P. Fundamentals of wireless communication[M]. Cambridge:Cambridge University Press,2005.
[7] Ma L. The benefits of inclined-orbit operations for geostationary orbit communication satellites[J]. Artificial Satellites, 2011,46:1-7.
[8] Li B H, Dempster A G. CAPS:China's regional navigation satellite system[J]. Inside GNSS, 2010,5:59-63.
[9] Wang M, Ma L H, Ai G X, et al. Study of ranging using dual orthogonal linear polarized antenna in chinese area positioning system[C]//China Satellite Navigation Conference(CSNC) 2012 Proceeding, Lecture Notes in Electricao Engineering 161,2012:457-466.
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