US 2025/0052861 A1Published application

Doppler division multiplexing (ddm) multiple-input multiple-output (mimo) radar system and decoding method

AssigneeNXP B.V.

InventorsFilip Alexandru Rosu, Adriana Brigalda, Daniel Silion

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Abstract

A radar system may include transmitter modules configured to transmit multiple transmit signals in accordance with a Doppler Domain Multiplexing (DDM) scheme, receiver modules configured to receive reflections from the plurality of transmit signals reflected off an object and to generate corresponding digital signals, and a signal processor configured to generate a range-Doppler antenna cube representing the digital signals, and, for each of range bin of the cube, to generate a decoded range-Doppler bit map (RDBM) from the range-Doppler antenna cube by generating decoded RDBM rows by extracting a range bin matrix, performing a Discrete Fourier Transform on range bin matrix to generate an output matrix, determining peak locations in the output matrix, comparing associated peak locations across transmit channels of the output matrix to identify location-matched peaks associated with the Doppler bin, and generating a decoded RDBM row based on the location-matched peaks.

Claims20

Dependent claims

A radar system comprising:

a plurality of transmitter modules configured to transmit a plurality of transmit signals in accordance with a Doppler Domain Multiplexing (DDM) scheme;
a plurality of receiver modules configured to receive reflections of the plurality of transmit signals reflected by at least one object and to generate digital signals based on the received reflections;
a signal processor configured to:
generate a range-Doppler antenna cube representing the digital signals, the range-Doppler antenna cube including at least a plurality of range bins and a plurality of Doppler bins;
for each range bin of the plurality of range bins of the range-Doppler antenna cube:
extract a range bin matrix from the range-Doppler antenna cube;
perform a Discrete Fourier transform (DFT) of each range-Doppler cell of the range bin matrix in a channel dimension to generate an output matrix;
determine peak locations in the output matrix;
compare, for each Doppler bin, associated peak locations across all transmit channels represented in the output matrix to identify location-matched peaks associated with the Doppler bin;
and
generate a decoded RDBM row based on the location-matched peaks;
and
generate a decoded RDBM based on the decoded RDBM rows.

10 more elements

A method comprising:

generating, by a signal processor of a radar system, a range-Doppler antenna cube representing digital signals corresponding to signals reflected by an object, the range-Doppler antenna cube including at least a plurality of range bins and a plurality of Doppler bins;
and
generating, by the signal processor, a decoded range-Doppler bit map (RDBM) by, for each range bin of the plurality of range bins of the range-Doppler antenna cube:
extracting a range bin matrix from the range-Doppler antenna cube;
performing a Discrete Fourier transform of each range-Doppler cell of the range-Doppler antenna cube to generate an output matrix;
determining peak locations in each Doppler bin of the output matrix;
comparing, for each of the Doppler bins of the output matrix, associated peak locations across all transmit channels represented in the output matrix to identify location-matched peaks associated with the Doppler bin;
generating a decoded RDBM row based on the location-matched peaks in each Doppler bin;
and
combining the decoded RDBM rows to generate the decoded RDBM.

7 more elements

Dependencies are inferred from the claim text.