Minimum Variance Distortionless Response Beamformer with Enhanced Nulling Level Control via Dynamic Mutated Artificial Immune System

In smart antenna applications, the adaptive beamforming technique is used to cancel interfering signals (placing nulls) and produce or steer a strong beam toward the target signal according to the calculated weight vectors. Minimum variance distortionless response (MVDR) beamforming is capable of de...

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Bibliographic Details
Published in:TheScientificWorld 2014-01, Vol.2014 (2014), p.1-9
Main Authors: Darzi, Soodabeh, Sankar, K. Prajindra, Paw, Johnny Koh Siaw, Salem, S. Balasem, Kiong, Tiong Sieh
Format: Article
Language:English
Subjects:
Algorithms
Antennas (Electronics)
Arrays
Artificial Intelligence
Beamforming
Equipment and supplies
Immune system
Immune System - physiology
Mathematical functions
Mathematical models
Mean square errors
Methods
Models, Theoretical
Optimization techniques
Radio communications
Signal processing
Signal Transduction
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Summary:In smart antenna applications, the adaptive beamforming technique is used to cancel interfering signals (placing nulls) and produce or steer a strong beam toward the target signal according to the calculated weight vectors. Minimum variance distortionless response (MVDR) beamforming is capable of determining the weight vectors for beam steering; however, its nulling level on the interference sources remains unsatisfactory. Beamforming can be considered as an optimization problem, such that optimal weight vector should be obtained through computation. Hence, in this paper, a new dynamic mutated artificial immune system (DM-AIS) is proposed to enhance MVDR beamforming for controlling the null steering of interference and increase the signal to interference noise ratio (SINR) for wanted signals.
ISSN:2356-6140
1537-744X
1537-744X
DOI:10.1155/2014/164053