Pal, Piya and Vaidyanathan, P. P. (2009) Frequency invariant MVDR beamforming without filters and implementation using MIMO radar. In: Acoustics, Speech and Signal Processing, 2009. IEEE , pp. 2081-2084. ISBN 978-1-4244-2353-8 http://resolver.caltech.edu/CaltechAUTHORS:20100510-100846863
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Frequency invariant beamforming with sensor arrays is generally achieved using filters in the form of tapped delay-lines following each sensor. However it has been recently shown that with the help of the rectangular smart antenna array, it is possible to generate frequency invariant beampattern without using filters. In this paper, this frequency invariant beamforming technique is utilized to perform MVDR beamforming in the beamspace by designing frequency invariant beams spanning the desired range of azimuthal angles and optimally combining them. However, the performance of the frequency invariant beamformer depends on the number of sensors which could be large for a rectangular array of size M × N. Making use of the virtual array concept used in MIMO radar, a novel method of producing the same frequency invariant beam, using only M transmitting and N receiving antennas, is proposed and a design example is provided to demonstrate the idea.
|Item Type:||Book Section|
|Additional Information:||© 2009 IEEE. Issue Date: 19-24 April 2009; Date of Current Version: 26 May 2009. Work supported in parts by the ONR grant N00014-08-1-0709, and the California Institute of Technology.|
|Subject Keywords:||Beamspace; Frequency Invariance; MIMO Radar; MVDR; Virtual Array|
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|Official Citation:||Pal, P.; Vaidyanathan, P.P.; , "Frequency invariant MVDR beamforming without filters and implementation using MIMO radar," Acoustics, Speech and Signal Processing, 2009. ICASSP 2009. IEEE International Conference on , vol., no., pp.2081-2084, 19-24 April 2009 doi: 10.1109/ICASSP.2009.4960025 URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=4960025&isnumber=4959496|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Jason Perez|
|Deposited On:||02 Jun 2010 17:01|
|Last Modified:||26 Dec 2012 12:01|
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