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Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh học Journal of Biology đề tài: Research Article Self-Tuning Synthesis Filter against Mutual Coupling and Interferences for GNSS and Its Implementation on Embedded Board | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2010 Article ID 123625 13 pages doi 10.1155 2010 123625 Research Article Self-Tuning Synthesis Filter against Mutual Coupling and Interferences for GNSS and Its Implementation on Embedded Board Chung-Liang Chang Department of Biomechatronics Engineering National Pingtung University of Science and Technology Pingtung 91201 Taiwan Correspondence should be addressed to Chung-Liang Chang chungliang@mail.npust.edu.tw Received 10 January 2010 Revised 2 May 2010 Accepted 9 June 2010 Academic Editor George Tombras Copyright 2010 Chung-Liang Chang. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Traditional spatial-temporal adaptive signal processing techniques are often applied to conduct narrowband and wideband interferences. However its mitigation performance degrades greatly due to mutual coupling. To solve this problem this paper aims to utilize a spatial-temporal self-tuning synthesis filter capable of mutual coupling compensation and interference mitigation. The spatial filter and temporal filter are to compensate for the effect of mutual coupling and interference mitigation respectively. Self-tuning mechanism is to adopt least square LS and minimum variable distortionless response- MVDR- based method to adjust spatial and temporal weights of antenna array. The experiment platform is established by the embedded development board. Simulation and experiment results demonstrate that the proposed method can effectively compensate for mutual coupling mitigate the cochannel interference up to 30 dB and enhance the acquisition performance of receivers in global navigation satellite system GNSS . 1. Introduction Satellites of global positioning system GPS operate on the orbit 20200 kilometers high and the power of carrier for L1
