Beamforming of temporally broadband bandpass plane waves using 2D FIR trapezoidal filters
Beamforming of temporally broadband bandpass plane waves using 2d fir trapezoidal filters
AdvisorBruton, L. T.
Bruton, Leonard T.
AuthorGunaratne, Thushara Kanachana
Gunaratne, Thushara Kanachana
MetadataShow full item record
AbstractTwo new discrete-domain methods are proposed for the beamforming of two-dimensional temporally broadband bandpass plane waves using two-dimensional spatio-temporal finite impulse response filters with novel trapezoidal-shaped passbands. The first method employs a complex-coefficient two-dimensional finite impulse response filter structure having an asymmetric trapezoidal-shaped passband at baseband and achieves the minimum possible temporal sampling rate for a given temporal bandwidth. The second method employs a real-coefficient polyphase two-dimensional finite impulse response filter structure having a rectangularly-symmetric double-trapezoidal-shaped passband and requires 50% less computational complexity for the same temporal bandwidth. Experimental results have confirmed that both methods are equally capable of enhancing the desired two-dimensional temporally broadband bandpass plane waves according to their directions of arrival under severe co-channel interference and multipath fading.
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