Patent · US Active

Noise cancellation system

US9806825B2 · kind B2 · utility

0Cited by

3References

20Claims

0Family size

Assignee

Futurewei Technologies, Inc. · US

Inventors

Ping-Hung Yin · Taipei, TW
Robert Grant Irvine · Greensboro, US
Seong-Mo Yim · Oak Ridge, US
Yusong Chi · Shanghai, CN
Chengfang Liao · Shanghai, CN
Feng Wang · 红钢城街道, CN
Eric Sung · New Taipei, TW

Key dates

Filing date	Apr 18, 2016
Grant date	Oct 31, 2017
Priority date	—
Expiry date	Apr 18, 2036

Classification

Technology area (CPC H)Electricity
CPC primaryH04B1/38
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

Abstract

A noise cancellation system comprises an I-channel mixer configured to receive a radio frequency signal from an antenna and an intermediate frequency signal from a local oscillator, a Q-channel mixer configured to receive the radio frequency signal from the antenna and a phase-shifted intermediate frequency signal from the local oscillator, a first noise cancellation apparatus connected with the I-channel mixer, wherein an I-channel differential mode second-order intermodulation component and an I-channel common mode second-order intermodulation component cancel each other in the first noise cancellation apparatus and a second noise cancellation apparatus connected with the Q-channel mixer, wherein a Q-channel differential mode second-order intermodulation component and a Q-channel common mode second-order intermodulation component cancel each other in the second noise cancellation apparatus.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.