Back to results
US 11,143,744 B2Granted
Method for attenuating leakage signal in FMCW radar and radar system therefor
AssigneeKorea Advanced Institute of Science and Technology
InventorsSeongOok Park, Junhyeong Park
Life of this patent
Estimating the term…
Abstract
A method for attenuating a leakage signal in an FMCW radar system and a radar system thereof are provided. The method includes concentrating a phase noise of the leakage signal on a stationary point and attenuating the phase noise based on the concentration of the phase noise on the stationary point.
Claims8
A method for attenuating a leakage signal in a radar system, the method comprising:
- transmitting at least one signal via a transmitter;
- receiving at least one reflection via a receiver;
- reducing the leakage signal between the transmitter and receiver, comprising:
- concentrating a phase noise of the leakage signal by limiting signal processing to a stationary point of a cosine function via a stationary point concentration (SPC) technique, the stationary point of the cosine function being a most insensitive point of the cosine function;
- and
- attenuating the phase noise based on the concentration of the phase noise of the stationary point of the cosine function, wherein the SPC technique comprises setting an intermediate frequency (IF) included in beat signals to a predetermined frequency and oversampling the beat signals to a predetermined oversampling frequency based on a Nyquist sampling theorem, wherein the oversampling the beat signals to a predetermined oversampling frequency based on a Nyquist sampling theorem comprises multiply a minimum available sampling frequency by the Nyquist sampling theorem by a positive rational number greater than one to sample the beat signals to the predetermined oversampling frequency, and
- wherein the concentrating the phase noise of the leakage signal further comprises multiplying the oversampled beat signals and a numerically controlled oscillator (NCO) signal to remove a beat frequency and phase of the leakage signal.
4 more elements
A radar system for attenuating a leakage signal, the system comprising:
- a transmitter to transmit at least one signal;
- a receiver to receive at least one refection and reduce the leakage signal between the transmitter and the receiver,
- wherein the receiver comprises means configured to:
- concentrate a phase noise of the leakage signal by limiting signal processing to a stationary point of a cosine function via a stationary point concentration (SPC) technique, the stationary point of the cosine function being a most insensitive point of the cosine function;
- and
- attenuate the phase noise based on the concentration of the phase noise of the stationary point of the cosine function, wherein the SPC technique comprises setting an intermediate frequency (IF) included in beat signals to a predetermined frequency and oversampling the beat signals to a predetermined oversampling frequency based on a Nyquist sampling theorem, and wherein the oversampling the beat signals to a predetermined oversampling frequency based on a Nyquist sampling theorem comprises multiply a minimum available sampling frequency by the Nyquist sampling theorem by a positive rational number greater than one to sample the beat signals to the predetermined oversampling frequency;
- and
- multiply the oversampled beat signals and a numerically controlled oscillator (NCO) signal to remove a beat frequency and phase of the leakage signal.
5 more elements
Dependencies are inferred from the claim text.