Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/62187
Title: Fast null-steering algorithm for broadband power inversion array
Authors: Ko, C.C. 
Issue Date: Oct-1990
Source: Ko, C.C. (1990-10). Fast null-steering algorithm for broadband power inversion array. IEE proceedings. Part F. Communications, radar and signal processing 137 (5) : 377-383. ScholarBank@NUS Repository.
Abstract: A fast algorithm for broadband power inversion adaptive arrays is investigated. Essentially, in this algorithm, each broadband jammer is individually tracked by steering a broadband null formed from the use of a set of tapped delay line filters in a Davies beamformer. To steer a particular broadband null to its optimal position, the algorithm first swaps the associated set of null-controlling filters into the last stage of the beam former, and then employs the LMS algorithm with a simple time-invariant decorrelation preprocessor to adjust the filter parameters to minimise the output power for a number of iterations. Performing this procedure for each null in turn results in continuous tracking of all the broadband jammers in a cyclical manner. Although the algorithm requires implementation of the broadband tapped delay-line Davies beamformer, only one tapped delay-line filter is being adaptively updated at any instant. Thus, when the number of elements is small, the overall implementation complexity of the proposed algorithm is comparable to that of using the LMS algorithm directly. However, since each broadband null is independently steered, the proposed algorithm has a much faster convergence behaviour, particularly under situations of severe jamming.
Source Title: IEE proceedings. Part F. Communications, radar and signal processing
URI: http://scholarbank.nus.edu.sg/handle/10635/62187
ISSN: 01437070
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

Page view(s)

27
checked on Dec 8, 2017

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.