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1 May 2009 Near-field sensing using subspace techniques
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Abstract
Three techniques are studied for sensor array based pupil-plane imaging of point sources in the near field. Pupil plane imaging is a potential alternative in the absence of well-developed focal plane array technology. The techniques are sum and delay focusing, minimum variance distortionless response (MVDR) focusing and subspace focusing. While the first has been widely proposed for usage, it is demonstrated here that the other two provide better resolution. Between the MVDR and the subspace approaches, the latter potentially provides better performance in noise.
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Raghuveer Rao and Sohail Dianat "Near-field sensing using subspace techniques", Proc. SPIE 7349, Wireless Sensing and Processing IV, 73490A (1 May 2009); https://doi.org/10.1117/12.819788
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