Interference Suppression with Total Least Square (TLS) Algorithm and Constant Modulus Algorithm (CMA) | ||||
The International Conference on Electrical Engineering | ||||
Article 185, Volume 6, 6th International Conference on Electrical Engineering ICEENG 2008, May 2008, Page 1-12 PDF (247.59 K) | ||||
Document Type: Original Article | ||||
DOI: 10.21608/iceeng.2008.34638 | ||||
View on SCiNiTO | ||||
Authors | ||||
K. A . El-Barbary1; K. H. Moustafa1; H. A. Hassan1; M. S. Alshol2 | ||||
1Egyptian Armed Forces. | ||||
2Libyan Armed Forces. | ||||
Abstract | ||||
Abstract: This paper proposes a beamforming scheme for suppressing interferences with a linear uniform antenna array interference cancellation is performed in two successive step steps, first estimation Direction Of Arrival’s DOA of incident signals using high resolution spatial spectral estimation techniques. In this paper we concerned with the Multiple Signal Classification MUSIC techniques and it is modified version, Spatial Smooth MUSIC for DOA estimation in both case of uncorrelated and correlated incident signal to the array. The second step is to adjust the linear array weight vector to insert nulls in the direction of interference signals. A proposal for adaptive algorithms to adjust weight vector based on Least Square (LS) algorithm is presented, the LS algorithm could reduces the array pattern in the direction of interference signals, spatially when their Interference to Noise Ratio (INR) is high. However interference source with low INR is difficult to be reduced using LS algorithm, therefore another proposal for interference cancellation based on Total Least Square (TLS) algorithm is proposed. Both the LS and TLS algorithms require reference signal which reduce system throughput anther proposal for adaptive algorithms to adjust weight vector based on Constant Modulus Algorithm (CMA) algorithm, the CMA algorithm could reduces the array pattern in the direction of interference signals without using reference signal. The behaviours of the proposed algorithms are presented in graphs along with comments and discussions. | ||||
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