Device and method for determining a DC component
AssigneeSony Corporation
InventorsRolf Noethlings, Norihito Mihota
Life of this patent
Estimating the term…
Abstract
A device for determining a DC component in a zero-IF radio receiver comprises an input configured to receive a complex baseband signal; and an analyzer configured to analyze the complex baseband signal to determine a DC component in the complex baseband signal by selecting at least three samples of the complex baseband signal and determining the intersection of at least two perpendicular bisectors of at least two straight lines, each straight line running through a different pair of two of said selected samples, said intersection representing the DC component. Further, a corresponding method, a radar device and a radar method are disclosed.
Claims17
A device for determining a DC component in a zero-IF radio receiver, said device comprising:
- circuitry configured to
- receive a complex base band signal;
- analyze the complex baseband signal to determine a DC component in the complex baseband signal by selecting at least three samples of the complex baseband signal and determining the intersection of at least two perpendicular bisectors of at least two straight lines, each straight line running through a different pair of two of said selected samples, said intersection representing the DC component;
- and
- subtract the determined DC component from samples of the complex baseband signal to compensate the DC component and obtain a reconstructed baseband signal.
A method for determining a DC component in a zero-IF radio receiver, said method comprising:
- receiving a complex baseband signal;
- analyzing the complex baseband signal to determine a DC component in the complex baseband signal by selecting at least three samples of the complex baseband signal and determining the intersection of at least two perpendicular bisectors of at least two straight lines, each straight line running through a different pair of two of said selected samples, said intersection representing the DC component;
- and
- subtracting the determined DC component from samples of the complex baseband signal to compensate the DC component and obtain a reconstructed baseband signal.
A radar system for distance determination, said system comprising:
- a radar device configured to transmit a Tx radar signal to a scene and to receive a Rx radar signal from the scene due to reflection of the Tx radar signal from one or more objects;
- a down-converter configured to down-convert the Rx radar signal to a complex baseband signal;
- and
- circuitry configured to
- receive the complex baseband signal,
- analyze the complex baseband signal to determine a DC component in the complex baseband signal,
- subtract the determined DC component from samples of the complex baseband signal to compensate the DC component and to obtain a reconstructed baseband signal;
- and
- extract phase information from the reconstructed baseband signal representing distance information of the distance between the radar device and the one or more objects.
A radar method for distance determination, said method comprising:
- transmitting a Tx radar signal to a scene;
- receiving a Rx radar signal from the scene due to reflection of the Tx radar signal from one or more objects;
- down-converting the Rx radar signal to a complex baseband signal;
- receiving the complex baseband signal;
- analyzing the complex baseband signal to determine a DC component in the complex baseband signal;
- subtracting the determined DC component from the samples of the complex baseband signal to compensate the DC component and to obtain a reconstructed baseband signal;
- and
- extracting phase information from the reconstructed baseband signal representing distance information of the distance between the radar device and the one or more objects.
Dependencies are inferred from the claim text.