Sequential doppler focusing
AssigneeWoven Planet North America, Inc.
InventorsMohammad Emadi, Jamaledin Izadian
Life of this patent
Estimating the term…
Abstract
In one embodiment, a method includes configuring a radar transceiver to transmit a first number of radar pulses at a first pulse repetition frequency (PRF); and determining a first value corresponding to a first object based on a first radar data received in response to the first number of radar pulses. The first object is identified based on the first value being higher than a predetermined threshold value. The method also includes configuring the radar transceiver to transmit a second number of radar pulses at a second PRF that is higher than the first PRF; determining a second value of the first object based on a second radar data received in response to the second number of radar pulses; and associating the second value with information of the first object.
Claims19
A method comprising, by a computing system:
- transmitting, using a radar transceiver, a first number of radar pulses at a first pulse repetition frequency (PRF);
- determining a first value identifying a first object from a first radar data received in response to the first number of radar pulses, wherein the first value being higher than a predetermined threshold value indicates a presence of the first object, wherein determining the first value includes performing a first fast Fourier transform (FFT) on the first radar data to obtain a low-resolution shift value of the first object;
- transmitting a second number of radar pulses at a second PRF that corresponds to a first Doppler frequency shift associated with the first object;
- determining a second value about the first object in response to the second number of radar pulses by performing a second fast Fourier transform (FFT) on a second radar data associated with the second number of radar pulses to obtain a high-resolution shift value of the first object, wherein the first FFT and the second FFT are executed sequentially with different fast Fourier transforms;
- and
- outputting at least a velocity of the first object according to the second value.
One or more computer-readable non-transitory storage media embodying software that is operable when executed to cause one or more processors to perform operations comprising:
- transmitting, using a radar transceiver, a first number of radar pulses at a first pulse repetition frequency (PRF);
- determining a first value identifying a first object from a first radar data received in response to the first number of radar pulses, wherein the first value being higher than a predetermined threshold value indicates a presence of the first object, wherein determining the first value includes performing a first fast Fourier transform (FFT) on the first radar data to obtain a low-resolution shift value of the first object;
- transmitting a second number of radar pulses at a second PRF that corresponds to a first Doppler frequency shift associated with the first object;
- determining a second value about the first object in response to the second number of radar pulses by performing a second fast Fourier transform (FFT) on a second radar data associated with the second number of radar pulses to obtain a high-resolution shift value of the first object, wherein the first FFT and the second FFT are executed sequentially with different fast Fourier transforms;
- and
- outputting at least a velocity of the first object according to the second value.
A computing system comprising:
- one or more processors;
- and
- one or more computer-readable non-transitory storage media coupled to one or more of the processors, the one or more computer-readable non-transitory storage media comprising instructions operable when executed by one or more of the processors to cause the computing system to perform operations comprising:
- transmitting, using a radar transceiver, a first number of radar pulses at a first pulse repetition frequency (PRF);
- determining a first value identifying a first object from a first radar data received in response to the first number of radar pulses, wherein the first value being higher than a predetermined threshold value indicates a presence of the first object, wherein determining the first value includes performing a first fast Fourier transform (FFT) on the first radar data to obtain a low-resolution shift value of the first object;
- transmitting a second number of radar pulses at a second PRF that corresponds to a first Doppler frequency shift associated with the first object;
- determining a second value about the first object in response to the second number of radar pulses by performing a second fast Fourier transform (FFT) on a second radar data associated with the second number of radar pulses to obtain a high-resolution shift value of the first object, wherein the first FFT and the second FFT are executed sequentially with different fast Fourier transforms;
- and
- outputting at least a velocity of the first object according to the second value.
Dependencies are inferred from the claim text.