Systems and methods for configurable hybrid self-interference cancellation

US11128329B2 · kind B2 · utility

Assignee

• Kumu Networks, Inc. · US

Inventors

• Wilhelm Steffen Hahn · Schonach, DE
• Alfred Riddle · Sunnyvale, US
• Ernie Landi · Sunnyvale, US
• Dai Sieh · Palo Alto, US
• Jung-Il Choi · Sunnyvale, US
• Mayank Jain · Sunnyvale, US

Key dates

• Filing date: Aug 28, 2020
• Grant date: Sep 21, 2021
• Expiry date: Aug 28, 2040

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L5/14
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A system for self-interference cancellation includes a frequency downconverter that decomposes a sampled RF transmit signal into an in-phase transmit signal and a quadrature transmit signal; a first analog vector modulator that scales the transmit signals to generate first scaled transmit signals; a second analog vector modulator that scales delayed transmit signals to generate second scaled transmit signals; a frequency upconverter that recomposes the scaled transmit signals into an RF self-interference cancellation signal; and a receive coupler that that combines the RF self-interference cancellation signal with a RF receive signal to reduce self-interference.