NDLI: Design of low-complexity scheme for maintaining distortion-free multi-carrier communications

Content Provider	IET Digital Library
Author	Jones, Keith John
Abstract	This study describes a scheme which enables one to improve the quality of one's own wireless communications, over a given frequency (or frequencies), when in the presence of inter-modulation distortion (IMD). The IMD is generated by one's own power amplifier (PA), when operating over an adjacent band of frequencies, and arises as a result of the non-linear nature of the PA when engaged in the transmission of modulated multi-carrier signals. The distortion appears in the form of inter-modulation products (IMPs), these occurring at multiple frequencies which may potentially coincide with one's communication frequency. The scheme enables one to predict the frequency locations and strengths of the IMPs and, when coincident with the communication frequency, to clear the IMPs from that frequency regardless of the levels of distortion present. The speed at which the IMPs are identified and cleared from the communication frequency – attributable to the efficient exploitation of polynomial arithmetic/algebraic techniques and a fast Fourier transform routine – offers the promise of maintaining reliable communications without having to interrupt the operation of one's own electronic equipment. The low complexity also offers the possibility of an attractive hardware solution with a low size, weight and power requirement.
Starting Page	495
Ending Page	506
Page Count	12
ISSN	17519675
Volume Number	8
e-ISSN	17519683
Issue Number	Issue 5, Jul (2014)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-spr/8/5
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-spr.2013.0057
Journal	IET Signal Processing
Publisher Date	2013-12-02
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Communication Frequency Distortion-free Multicarrier Communication Maintenance Electronic Equipment Fast Fourier Transform Frequency Locations Frequency Modulation IMD Integral Transforms Intermodulation Distortion Intermodulation Product Low-complexity Scheme Modulation And Coding Method Multicarrier Signal Modulation Polynomial Arithmetic-algebraic Technique Power Amplifler Power Requirement Radio Link And Equipment Radio Network Signal Processing Signal Processing And Detection Size Requirement Weight Requirement Wireless Communication
Content Type	Text
Resource Type	Article
Subject	Signal Processing Electrical and Electronic Engineering

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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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