Experimental verification of multiple-input multiple output (MIMO) beamforming capabilities using a time-division coherent MIMO radar

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Authors
  1. Sévigny, P.
  2. Moo, P.W.
  3. Laneve, T.
Corporate Authors
Defence Research and Development Canada, Ottawa Research Centre, Ottawa ON (CAN)
Abstract
Recently, there has been increasing interest from the research community in multiple input multiple output (MIMO) architectures for a variety of radar applications. We are interested in clarifying the angle estimation accuracy of coherent or co-located MIMO radar to gain an accurate understanding of its potential benefits. The theoretical two-way antenna radiation patterns are derived for three configurations of a linear array: a phased array configuration, a MIMO-1 configuration using orthogonal waveform transmission on all elements, and a MIMO-2 configuration using orthogonal waveform transmission on the two end elements. Field experimental results obtained with an 8-element X-band linear array time-division radar and trihedral targets are discussed. Phased array radar data obtained with a Mixed Experiments and Simulations Approach (MESA) are also discussed. It is found that the experimental mainbeam patterns match the theoretical patterns. MIMO-1 is shown to have the same two-way radiation pattern as that of a phased array radar configuration. Compared to MIMO-1 and phased array, MIMO-2 has enhanced angle estimation accuracy, lower gain and higher sidelobes, while only requiring two orthogonal waveforms on transmit.

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Keywords
multiple-input multiple output;MIMO;radar;phased array radar;antenna radiation pattern
Report Number
DRDC-RDDC-2015-R051 — Scientific Report
Date of publication
01 Apr 2015
Number of Pages
62
DSTKIM No
CA040429
CANDIS No
801405
Format(s):
Electronic Document(PDF)

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