Title

Modeling and Estimation of LCD Noise Modulation for Radio Frequency Interference

Abstract

A liquid crystal display baseband noise, whose spectrum is much lower than RF bands, is modulated with the carrier signal of cellular communication and interferes with an Rx receiver resulting in a desensitization problem. The modulation phenomenon is modeled with impedance parameters and a modulation coefficient. The coupled noise on the embedded cellular antenna is experimentally validated in both small- and large-frequency offset cases. In addition, to estimate the modulated noise coupling to the antenna earlier in the development process, a numerical simulation method considering the impedance of display drive IC is proposed successfully validated.

Department(s)

Electrical and Computer Engineering

Research Center/Lab(s)

Electromagnetic Compatibility (EMC) Laboratory

Comments

This work was supported in part by the National Science Foundation under Grant IIP-1440110.

Keywords and Phrases

Liquid Crystal Display (LCD); Mobile Phone; Modulation; Noise Coupling; Radio Frequency (RF) Interference

International Standard Serial Number (ISSN)

0018-9375

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2017 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

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