NDLI: Effect of Phase Mismatch on Image Rejection in Weaver Architecture

Content Provider	IEEE Xplore Digital Library
Author	SeongJae Cho Hwang Soo Lee
Copyright Year	2001
Abstract	In a radio frequency receiver, image signals degrade the sensitivity of the receiver for receiving desired signals. This letter analyzes the effect of phase mismatch on image rejection in the Weaver architecture, which has been proposed to reject image signals. Weaver architecture requires the phase difference between the I signal and Q signal of the first and second local oscillators (LOs) to be 90deg. However, the realization of accurate 90deg phase shifters is very difficult. It is found here that an accurate 90deg phase shifter is not essential in Weaver architecture. Instead, by making the phase mismatch between the I and Q signals of the first LO be equal to that of the second LO, image rejection can be performed, being insensitive to the phase mismatch. The reason for this is mathematically analyzed and simulation results are presented
Sponsorship	IEEE Microwave Theory and Techniques Society
Starting Page	70
Ending Page	72
Page Count	3
File Size	285993
File Format	PDF
ISSN	15311309
Volume Number	17
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Phase shifters Image analysis Radio frequency Receivers RF signals Computer architecture Signal analysis Local oscillators Radio transceivers Degradation Weaver architecture Image rejection phase mismatch
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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