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:
Dec. 01, 2015
Filed:
Apr. 10, 2013
St-ericsson SA, Plan-les-Ouates, CH;
Fabrice Belveze, Claix, FR;
Robin Gerzaguet, Gieres, FR;
ST-ERICSSON SA, Plan-Les-Ouates, CH;
Abstract
A receiver () has an ln-phase path (l-path) () that delivers a digital l-path signal x(t) and a Quadrature path (Q-path) () that delivers a digital Q-path signal x(t). The receiver () includes a compensation stage () arranged to compensate for gain error g and phase error φ between the digital l-path signal x(t) and the digital Q-path signal x(t). The compensation stage () has a compensation coefficient generation stage (), a compensation coefficient application stage (), a gain control stage (), a relative gradient generation stage () and a step parameter generation stage (). Compensation coefficients W, W, W, Wapplied to the digital l-path signal x(t) and the digital Q-path signal x(t) are generated by iteratively updating them using a relative gradient of the compensated digital in-phase signal y(t) and a compensated digital quadrature signal y(t), and a step parameter μ, the magnitude of which is adjusted based on a rate of change of the compensation coefficients W, W, W, W.