Radar apparatus, system, and method

A radar device comprising:

• a plurality of Transmit (Tx) antennas;
• a plurality of Tx chains to transmit radar Tx signals via the plurality of Tx antennas;
• a plurality of Receive (Rx) antennas;
• a plurality of Rx chains to process radar Rx signals received via the plurality of Rx antennas, the radar Rx signals based on the radar Tx signals, wherein an Rx chain of the plurality of Rx chains comprises a multi-core Low Noise Amplifier (LNA) configured to provide an amplified Radio-Frequency (RF) signal at an output node based on an input RF signal at an input node, the multi-core LNA comprising a plurality of LNA cores connected in parallel between the input node and the output node, the plurality of LNA cores comprising:
• a first LNA core comprising a first LNA core input connected to the input node and a first LNA core output connected to the output node, the first LNA core biased by a first bias voltage;
• and
• a second LNA core comprising a second LNA core input connected to the input node and a second LNA core output connected to the output node, the second LNA core biased by a second bias voltage different from the first bias voltage, wherein at least one of the first bias voltage or the second bias voltage is based on a Baseband (BB) signal, the BB signal is based on the amplified RF signal, wherein the first bias voltage and the second bias voltage are configured such that a total Output Intercept Point of an n-th order (OIPn) of a plurality of Rx chain elements of the Rx chain, which comprises the multi-core LNA, a mixer, and BB circuitry, is greater than an OIPn of the plurality of Rx chain elements excluding the multi-core LNA;
• and
• a processor to generate radar information based on the radar Rx signals processed by the Rx chains.

A vehicle comprising:

• a system controller configured to control one or more vehicular systems of the vehicle based on radar information;
• and
• a radar device configured to provide the radar information to the system controller, the radar device comprising:
• a plurality of Transmit (Tx) antennas;
• a plurality of Tx chains to transmit radar Tx signals via the plurality of Tx antennas;
• a plurality of Receive (Rx) antennas;
• a plurality of Rx chains to process radar Rx signals received via the plurality of Rx antennas, the radar Rx signals based on the radar Tx signals, wherein an Rx chain of the plurality of Rx chains comprises a multi-core Low Noise Amplifier (LNA) configured to provide an amplified Radio-Frequency (RF) signal at an output node based on an input RF signal at an input node, the multi-core LNA comprising a plurality of LNA cores connected in parallel between the input node and the output node, the plurality of LNA cores comprising:
• a first LNA core comprising a first LNA core input connected to the input node and a first LNA core output connected to the output node, the first LNA core biased by a first bias voltage;
• and
• a second LNA core comprising a second LNA core input connected to the input node and a second LNA core output connected to the output node, the second LNA core biased by a second bias voltage different from the first bias voltage, wherein at least one of the first bias voltage or the second bias voltage is based on a Baseband (BB) signal, the BB signal is based on the amplified RF signal, wherein the first bias voltage and the second bias voltage are configured such that a total Output Intercept Point of an n-th order (OIPn) of a plurality of Rx chain elements of the Rx chain, which comprises the multi-core LNA, a mixer, and BB circuitry, is greater than an OIPn of the plurality of Rx chain elements excluding the multi-core LNA;
• and
• a processor to generate the radar information based on the radar Rx signals processed by the Rx chains.