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US 11,994,609 B2Granted
Method and apparatus for coded radar signals
AssigneeBdcm A2 LLC
InventorsShoaib Shafi, Maha Achour
Life of this patent
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Abstract
Examples disclosed herein relate to a system of object detection, the system including a continuous modulation signal unit to generate a continuous modulation signal, a code generation unit to sample, quantize and encode the continuous modulation signal to generate an encoded signal, a transmit antenna to transmit the encoded signal, and a receive antenna to receive a reflection of the encoded signal and separate the reflection of the encoded signal from other signals.
Claims13
A method for signal generation, comprising:
- generating a continuous waveform signal;
- encoding the continuous waveform signal as a first signal, wherein the encoding comprises applying a Kasami coding to generate the first signal separable from noise and interfering signals based on the Kasami coding in the first signal, wherein the encoding further comprises generating, via a code control module, a pulse code modulation-type signal in the first signal that enables an identification of a detected object, and wherein the encoding further comprises generating, via a modulation control module, a quantization of the first signal in a form that enables a derivation of a range and velocity of the detected object;
- transmitting the first signal from a first transmitter through multiple transmissions in a beam-steering scheme, wherein each transmission of the multiple transmissions is coded differently from other transmissions of the multiple transmissions;
- receiving a plurality of signals from a plurality of sources;
- isolating a reflection of the first signal from the plurality of signals;
- determining a range and a velocity of an object detected by the reflection of the first signal;
- comparing received signals to a power threshold to identify direct reflection signals and low power signals;
- and
- comparing low power signals to a reduced power threshold to separate the low power signals from noise signals.
6 more elements
A method for object detection, comprising:
- allocating a code to a radar sensing unit in a vehicle;
- encoding a continuous modulation signal with the code, thereby generating a coded signal, wherein the encoding comprises generating, via a code control module, a pulse code modulation-type signal in the coded signal that enables an identification of a detected object, and wherein the encoding further comprises generating, via a modulation control module, a quantization of the coded signal in a form that enables a derivation of a range and velocity of the detected object;
- transmitting the coded signal in multiple transmissions during a beam- steering operation of the radar sensing unit, wherein each transmission of the multiple transmissions is coded differently from other transmissions of the multiple transmissions;
- receiving a plurality of reflections from a plurality of sources;
- filtering the plurality of reflections to isolate the coded signal, wherein the coded signal is encoded with Kasami coding and separable from noise and interfering signals based on the Kasami coding in the coded signal;
- detecting an interference signature;
- comparing received signals to a power threshold to identify direct reflection signals and low power signals;
- and
- comparing low power signals to a reduced power threshold to separate the low power signals from noise signals.
6 more elements
Dependencies are inferred from the claim text.