Circuits and methods for detecting interferers

US10122396B2 · kind B2 · utility

Assignee

• The Trustees of Columbia University in the City of New York · US

Inventors

• Peter R. Kinget · Summit, US
• John W. Wright · Los Altos, US
• Rabia Tugce Yazicigil · New York, US

Key dates

• Filing date: Sep 14, 2015
• Grant date: Nov 6, 2018
• Expiry date: Sep 14, 2035

Classification

• Technology area (CPC H): Electricity
• CPC primary: H03F2200/451
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

Mechanisms for interferer detection can detect interferers by detecting elevated signal amplitudes in one or more of a plurality of bins (or bands) in a frequency range between a maximum frequency (fMAX) and a minimum frequency (fMIN). To perform rapid interferer detection, the mechanisms downconvert an input signal x(t) with a local oscillator (LO) to a complex baseband signal xI(t)+jxQ(t). xI(t) and xQ(t) are then multiplied by m unique pseudorandom noise (PN) sequences (e.g., Gold sequences) gm(t) to produce m branch signals for I and m branch signals for Q. The branch signals are then low pass filtered, converted from analog to digital form, and pairwise combined by a pairwise complex combiner. Finally, a support recovery function is used to identify interferers.