Device and method for determining a DC component

Patent metadata

Field	Value
Publication number	US-10763977-B2
Application number	US-201615556677-A
Country	US
Kind code	B2
Filing date	Mar 9, 2016
Priority date	Mar 9, 2015
Publication date	Sep 1, 2020
Grant date	Sep 1, 2020

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.

First claim

The invention claimed is:

1. 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.

2. The device as claimed in claim 1 , wherein
said circuitry is configured to determine the DC component in the filtered baseband signal by selecting exactly three samples of the complex baseband signal and determining the intersection of exactly two perpendicular bisectors of exactly two straight lines.

3. The device as claimed in claim 2 , wherein
said circuitry is configured to determine the DC component in the complex baseband signal by

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Assignees

• Sony Corp

Inventors

• Noethlings Rolf
• Mihota Norihito

Classifications

• H04B2001/305

  using DC offset compensation techniques · CPC title

• H04B17/104 Primary

  of other parameters, e.g. DC offset, delay or propagation times · CPC title

• H04L25/061

  providing hard decisions only; arrangements for tracking or suppressing unwanted low frequency components, e.g. removal of DC offset (removal of DC offset in coupling arrangements H04L25/029, H04L25/0296) · CPC title

• H03D3/008

  Compensating DC offsets · CPC title

• G01S7/4861

  Circuits for detection, sampling, integration or read-out · CPC title