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Báo cáo hóa học: " Estimation of Directions of Arrival by Matching Pursuit (EDAMP)"

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: Estimation of Directions of Arrival by Matching Pursuit (EDAMP) | EURASIP Journal on Wireless Communications and Networking 2005 2 197-205 2005 Hindawi Publishing Corporation Estimation of Directions of Arrival by Matching Pursuit EDAMP Gunes Z. Karabulut School of Information Technology and Engineering University of Ottawa ON Canada K1N 6N5 Email gkarabul@site.uottawa.ca Tolga Kurt School of Information Technology and Engineering University of Ottawa ON Canada K1N 6N5 Email tkurt@site.uottawa.ca Abbas Yongacogiu School of Information Technology and Engineering University of Ottawa ON Canada K1N 6N5 Email yongacog@site.uottawa.ca Received 30 April 2004 Revised 7 October 2004 We propose a novel system architecture that employs a matching pursuit-based basis selection algorithm for directions of arrival estimation. The proposed system does not require a priori knowledge of the number of angles to be resolved and uses very small number of snapshots for convergence. The performance of the algorithm is not affected by correlation in the input signals. The algorithm is compared with well-known directions of arrival estimation methods with different branch-SNR levels correlation levels and different angles of arrival separations. Keywords and phrases directions of arrival estimation adaptive antennas matching pursuit algorithm spatial resolution. 1. INTRODUCTION In recent years the impact of adaptive antennas and array processing to the system performance of wireless communication systems has gained intense attention. Adaptive or smart antennas consist of an antenna array combined with space and time processing. The processing of different antennas helps to improve system performance in terms of both capacity and quality in particular by decreasing cochannel interference. A detailed overview of adaptive antennas can be found in 1 2 . One of the most important problems for adaptive antenna systems in order to perform well is to have reliable reference inputs. These references include array element positions and characteristics directions