Digitally modulated radar transmitter modules, systems and methods
AssigneeNXP USA, Inc.
InventorsGustavo Guarin Aristizabal, Ralf Reuter, Maik Brett
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Abstract
A digitally modulated radar, DMR, transmitter module is disclosed comprising: a sequence generator, configured to generate a repeating digital sequence signal based on a relatively low-frequency clock signal; a mixer configured to combine the digital sequence signal with at least one phase-delayed copy of the digital sequence signal, to provide a combined signal; and a modulator configured to modulate a relatively high-frequency carrier signal, in dependence on the combined signal, to provide a modulated signal. Corresponding systems and methods are also disclosed.
Claims20
A digitally modulated radar (DMR) transmitter module comprising:
- a sequence generator, configured to generate a repeating digital sequence signal based on a clock signal;
- a mixer configured to combine the repeating digital sequence signal with at least one phase-delayed copy of the repeating digital sequence signal, to provide a combined signal, where the phase-delayed copy of the repeating digital sequence signal has an auto-correlation with the repeating digital sequence signal;
- and
- a modulator configured to modulate a relatively high-frequency carrier signal, in dependence on the combined signal, to provide a modulated signal.
A method of generating a digitally modulated radar signal, the method comprising:
- generating a digital sequence signal from a repeating digital sequence and a clock signal;
- generating at least one phase-delayed copy of the digital sequence signal;
- combining the digital sequence signal, in a mixer, with at least one phase-delayed copy of the digital sequence signal, to provide a combined signal, where the phase-delayed copy of the digital sequence signal has an auto-correlation with the digital sequence signal;
- and
- modulating a relatively high-frequency carrier signal, in dependence on the combined signal, to provide the digitally modulated radar signal.
A digitally modulated radar (DMR) system comprising:
- a transmitter module comprising:
- a sequence generator, configured to generate a digital sequence signal based on a clock signal;
- a mixer configured to combine the digital sequence signal with at least one phase-delayed copy of the digital sequence signal to provide a combined signal, where the phase-delayed copy of the digital sequence signal has an auto-correlation with the digital sequence signal;
- and
- a modulator configured to modulate a relatively high-frequency carrier signal, in dependence on the combined signal, to provide a modulated signal;
- and
- a receiver module comprising:
- a down converter configured to down-convert a received signal to a baseline frequency;
- an analog-to-digital converter (ADC) configured to digitise portions of the down-converted received signal;
- and
- a cross-correlator configured to cross-correlate the portions of the down-converted received signal with the digital sequence signal.
Dependencies are inferred from the claim text.