tailieunhanh - Báo cáo hóa học: " Research Article Fast Signal Recovery in the Presence of Mutual Coupling Based on New 2-D Direct Data Domain Approach"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Fast Signal Recovery in the Presence of Mutual Coupling Based on New 2-D Direct Data Domain Approach | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2011 Article ID 607679 9 pages doi 2011 607679 Research Article Fast Signal Recovery in the Presence of Mutual Coupling Based on New 2-D Direct Data Domain Approach Ali Azarbar 1 G. R. Dadashzadeh 2 and H. R. Bakhshi2 1 Department of Computer and Information Technology Engineering Islamic Azad University Parand Branch Tehran 37613 96361 Iran 2 Faculty of Engineering Shahed University Tehran 33191 18651 Iran Correspondence should be addressed to Ali Azarbar aliazarbar@ Received 17 August 2010 Revised 9 December 2010 Accepted 18 January 2011 Academic Editor Richard Kozick Copyright 2011 Ali Azarbar et al. 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. The performance of adaptive algorithms including direct data domain least square can be significantly degraded in the presence of mutual coupling among array elements. In this paper a new adaptive algorithm was proposed for the fast recovery of the signal with one snapshot of receiving signals in the presence of mutual coupling based on the two-dimensional direct data domain least squares 2-D D3LS for uniform rectangular array URA . In this method inverse mutual coupling matrix was not computed. Thus the computation was reduced and the signal recovery was very fast. Taking mutual coupling into account a method was derived for estimation of the coupling coefficient which can accurately estimate the coupling coefficient without any auxiliary sensors. Numerical simulations show that recovery of the desired signal is accurate in the presence of mutual coupling. 1. Introduction Adaptive antenna arrays are strongly affected by the existence of mutual coupling MC effect between antenna elements thus if the effects of MC are ignored the system performance