Receiver units and systems with mismatch filters for MIMO radar, and design methods therefor

US11460566B2 · kind B2 · utility

Assignee

• NXP USA, Inc. · US

Inventors

• Gustavo Adolfo Guarin Aristizabal · Munich, DE
• Ralf Reuter · Landshut, DE
• Maik Brett · Schweinhub, DE

Key dates

• Filing date: Dec 11, 2019
• Grant date: Oct 4, 2022
• Expiry date: Dec 14, 2040

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S7/2883
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A receiver unit is disclosed for use in a multiple-input-multiple output, MIMO, radar system having a plurality of transmitters each for transmitting one of a group of orthogonal digital-transmitter-signals on a carrier wave, the receiver unit configured and adapted to receive a raw-analog-signal on a carrier wave reflected from one or more target objects. The receiver unit comprises: a down-converter configured to extract the raw-analog-signal from the carrier wave; an analog-to-digital converter configured to derive a raw-digital-signal from the raw-analog-signal; a plurality of filter units, each filter unit associated with a different one of the digital-transmitter-signals, operable on the raw-digital-signal and configured to identify reflection-event sequences in the raw-digital-signal; and a time-frequency transform sub-unit; wherein each filter unit comprises a mismatch filter having predetermined filter coefficients and designed to reduce the magnitude of side-lobes associated with a reflection-event sequence in the raw-digital-signal. Associated systems and methods are also disclosed.