Multi-mode radar to resolve spatial ambiguities

Abstract

In an imaging radar, an example involves the use of multiple sets of transmit antennas included in transceiver circuitry for transmitting in multiple modes. The transmission can involve at least one transmit antenna in each of at least two of the multiple sets transmitting continuous wave energy concurrently (simultaneously) in one or more of multiple different modes. The transceiver circuitry can include multiple receive antennas that can be receiving reflections of the continuous wave energy possibly from various targets. Signals from the multiple receive antennas can be routed to signal processing circuitry. The signal processing circuitry can respond to the received reflections of the continuous wave energy by evaluating differences in phase antenna gain and / or bits due to the transmit antenna locations associated with the received reflections. This signal processing evaluation can mitigate or resolve at least one spatial ambiguity in at least one direction of arrival dimension associated with the received reflections.

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