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Coded OFDM Waveforms for MIMO Radars
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DOI：10.1109/TVT.2021.3073268.png)
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Abstract
En 中文
Emerging digital radar concepts such as orthogonal frequency-division multiplexing (OFDM) allow flexible signal generation. This opens up new opportunities in waveform design in a multiple-input multiple-output (MIMO) system such as introducing coding for signal multiplexing. In this article, coded MIMO OFDM waveforms are proposed and investigated that allow continuous and simultaneous wideband transmission for all transmitters of a multiple transmit and receive antenna array for spatial radar environment perception. Challenges for coded MIMO OFDM radar operation are derived, and three coded MIMO strategies are introduced and analyzed. Their potential is validated and compared to the standard subcarrier interleaving OFDM approach using simulations and measurements of an experimental 4 x 4 MIMO OFDM radar at 77GHz.
Keywords:
OFDM
MIMO
radar
coding
CDM
FDM
TDM
STC
interleaving
auto-correlation
cross-correlation
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