DFT approach to broadband beam scanning without using steering delays

Scanning a broadband beam using an array of sensors is achieved by inserting steering delays in front of each sensor to compensate for the misalignment between the array geometry and the scanning direction. Use of steering delays may cause the loss of the performance of the system due to implementation errors. This paper studies the performance of an easily implementable and computationally very efficient method that does not require steering delays and compares its performance with the mean square error minimization method. The method obtains the weights of array system by solving narrowband constrained beam-forming problems at each frequency bin.