The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 18, 2025
Filed:
Dec. 30, 2022
Signalchip Innovations Private Limited, Bangalore, IN;
Himamshu Gopalakrishna Khasnis, Bangalore, IN;
Navaneetha Krishnamurthy, Bangalore, IN;
SIGNALCHIP INNOVATIONS PRIVATE LIMITED, Bangalore, IN;
Abstract
A global navigation satellite system (GNSS) receiver for improving accuracy of a GNSS position estimation using a sigma-delta based fractional interpolation in a delay-locked loop is provided. The GNSS receiver includes a correlator, a code phase discriminator, a first loop filter, a code numerically controlled oscillator, and a sigma-delta modulator. The correlator correlates a GNSS C/A signal received from a satellite with a locally generated GNSS C/A code by multiplying the locally generated GNSS C/A code with incoming data samples. The code phase discriminator determines a delay between the locally generated GNSS C/A code and the GNSS C/A signal received from the satellite. The first loop filter averages the delay measured by the code phase discriminator. The code numerically controlled oscillator generates the local GNSS C/A code based on a unique CA code that corresponds to the satellite. The sigma-delta modulator imparts a fractional delay to the locally generated GNSS C/A code based on an output of the first loop filter.