US Patent:
20200395966, Dec 17, 2020
Inventors:
- Sunnyvale CA, US
Alfred Riddle - Sunnyvale CA, US
Ernie Landi - Sunnyvale CA, US
Dai Sieh - Sunnyvale CA, US
Jung-Il Choi - Sunnyvale CA, US
Mayank Jain - Sunnyvale CA, US
International Classification:
H04B 1/10
H04L 5/14
H04B 1/40
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.