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低轨道卫星隐蔽通信快速捕获技术研究

Keywords: 低轨道卫星,隐蔽通信,直接序列扩频系统,超大多普勒频偏,快速捕获

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Abstract:

针对低轨道卫星隐蔽通信系统特有的接收机低信噪比、超大多普勒频偏及快速捕获要求等特点,提出一种时间频率二维准全并行多符号累积捕获实现算法,并对算法中关键参数进行优化设计.载荷样机测试结果表明,该算法在符号速率为1ksample/s,多普勒频偏为±50kHz,接收机信噪比Es/N0最小为3dB条件下,捕获时间优于100ms,漏检概率小于0.003,虚警概率小于3×10-6.

References

[1]  全庆一,廖建新,于玲,等.卫星移动通信[M].北京:北京邮电大学出版社,2000. Quan Qingyi, Liao Jianxin, Yu Ling, etal. Satellite mobile communications[M]. Beijing: Beijing University of Posts and Telecommunications Press,2000. (in Chinese)
[2]  Viterbi A J. CDMA: principles of spread spectrum communication[M]. New York: Addison-Wesley, 1995.
[3]  Irfan A, Naofal A, John E H. Doppler characterization for LEO satellites[J]. IEEE Trans on Commun, 1998,46(3):309 313.
[4]  Persson B, Dodds D. A segmented matched filter for CDMA code synchronization in systems with Doppler frequency offset //Proceedings of IEEE Globecom. San Antonio, Texas: , 2001:648-653.
[5]  罗云光,李江域,韩方景.基于FFT 实现短波扩频系统载波频差估计[J].电子信息战对技术,2008,3(2):22 25. Luo Yunguang, Li Jiangyu, Han Fangjing. Estimation of the carrier frequency difference of HF spread spectrum system based on FFT[J]. Electronic Information Warface Technology, 2008,3(2):22 25. (in Chinese)
[6]  Nezami M K. Synchronization in wireless communi-cation systems[M]. Boston, Artech: , 2003.

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