Particle filter based automatic frequency control scheme by combining the two-step structure  

作　　者：CHEN Peng LI Ju-hu NIU Kai WU Wei-ling 

机构地区：[1]Key Laboratory of Universal Wireless Communications(Minislry of Education),Beijing University of Posts and Telecommunications,Beijing 100876,China

出　　处：《The Journal of China Universities of Posts and Telecommunications》2012年第2期9-14,共6页中国邮电高校学报（英文版）

基　　金：supported by the National Basic Research Program of China (2009CB320401);the National Science and Technology Major Project of China (2012ZX03004005-002);the New Generation Broadband Wireless Mobile Communication Network of Major Special Projects (2010ZX03003-001);the Fundamental Research Funds for the Central Universities (2010PTB-03-04 G470220)

摘　　要：In this paper a new automatic frequency control （AFC） scheme was proposed, which could be used for the receiver of low earth orbit （LEO） satellite communication system in continuous transmitting scenario. By employing the time varying characteristic of particle filter technique, the new scheme combined the preamble based estimating step and data based estimating step to provide initial probability density recursively. Theoretical analysis proved that the proposed AFC scheme could provide better performance than the two-step scheme. The same conclusion was achieved by computer simulations with the criteria of root-mean square （RMS） frequency estimating performance and bit error rate performance.In this paper a new automatic frequency control （AFC） scheme was proposed, which could be used for the receiver of low earth orbit （LEO） satellite communication system in continuous transmitting scenario. By employing the time varying characteristic of particle filter technique, the new scheme combined the preamble based estimating step and data based estimating step to provide initial probability density recursively. Theoretical analysis proved that the proposed AFC scheme could provide better performance than the two-step scheme. The same conclusion was achieved by computer simulations with the criteria of root-mean square （RMS） frequency estimating performance and bit error rate performance.

关 键 词：satellite communication Doppler effect automatic frequency control particle filter 

分 类 号：TN850.4[电子电信—信息与通信工程] V249.32[航空宇航科学与技术—飞行器设计]