Jin C Zhou

US Patent:

20170250677, Aug 31, 2017

Filed:

Oct 1, 2015

Appl. No.:

15/515823

Inventors:

Jin Zhou - New York NY, US
Harish Krishnaswamy - New York NY, US

International Classification:

H03H 19/00
H04L 25/03
H04B 1/38
H03H 11/04
H04B 17/336

Abstract:

Self-interference cancellers are provided. The self-interference cancellers can include multiple second-order, N-path G-C filters. Each filter can be configured to cancel self-interference on a channel of a desired bandwidth. Each filter can be independently controlled using a variable transmitter resistance, a variable receiver resistance, a variable baseband capacitance, a variable transconductance, and a variable time shift between local oscillators that control switches in the filter. By controlling these variables, magnitude, phase, slope of magnitude, and slope of phase of the cancellers frequency responses can be controlled for self-interference cancellation. A calibration process is also provided for configuring the canceller.