Tracking performance of multiple-input multiple-output radar for accelerating targets

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Authors
  1. Moo, P.W.
  2. Ding, Z.
Corporate Authors
Defence Research and Development Canada, Ottawa Research Centre, Ottawa ON (CAN)
Abstract
Multiple-input multiple-output (MIMO) radar utilizes orthogonal waveforms on each transmit element to achieve virtual aperture extension. Compared to a directed beam radar, MIMO radar has increased Doppler resolution due to longer integration times. However, the requirement for longer integration times can also cause target returns to be spread over multiple range-Doppler bins, which decreases probability of detection. This technical memorandum derives an analytical expression for probability of detection that explicitly accounts for range-Doppler migration. The effect of target velocity, target acceleration and integration time on range-Doppler migration is analysed. A framework for velocity and acceleration compensation and step sizes for full and partial compensation are proposed. Single-target track completeness and track accuracy are computed for four configurations: directed beam radar, MIMO radar with full compensation, MIMO radar with partial compensation, and uncompensated MIMO radar. Results indicate that compensation is required to prevent degraded probability of detection as target velocity and acceleration increase. Full compensation mitigates the effects of range-Doppler migration but requires additional computational complexity. The use of partial compensation reduces computational complexity requirements but has diminished tracking performance due to coasting over missed measurements.

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Keywords
MIMO Radar;phased array radar;radar tracking;accelerating targets
Report Number
DRDC-OTTAWA-TM-2012-167 — Technical Memorandum
Date of publication
01 Oct 2013
Number of Pages
40
DSTKIM No
CA042496
CANDIS No
803695
Format(s):
Electronic Document(PDF)

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