Abstract
A generalized sideiobe-cancelling structure is employed in which a non-adaptive beamformer operates in parallel with an adaptive beamformer. The effects of orthogonal and nonorthogonal complement constraint matrices are analyzed under the application of steering direction constraint. An unconstrained Varaible Step Size LMS (VSS-LMS) power minimization algorithm is employed to adapt the delay line weights. The application of non-orthogonal complement constraint matrix is violation of Frost's procedure, but this enhances interference and sidelobe cancellation action at the cost of high misadjustment in weight adjustment. But misadjustment is reduced using VSS-LMS algorithm, which has been implemented with significant changes, making it to work in Fixed Step Size LMS (FSS-LMS) as well as in VSS-LMS mode.Simulation results are presented to support the analysis and to compare the performance of modified algorithm with FSS-LMS algorithm. The GSC beamformer shows better performance with non-orthogonal complement constraint matrix and it is easy to implement because of lesser complexity due to modifications in adaptive algorithm.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
