NDLI: Electronic Predistortion by Polar Coordinate Transformation Using the CORDIC Algorithm

Content Provider	IEEE Xplore Digital Library
Author	Sugihara, T. Goto, K. Konishi, Y. Mizuochi, T.
Copyright Year	1983
Abstract	In this paper, we propose a polar coordinate transformation in real time using the COordinate Rotation DIgital Computer (CORDIC) algorithm in order to realize an electronic predistorting transmitter with a practical circuit implementation. The proposal enables a dual-drive Mach-Zehnder modulator (DDMZM) to use vector in-phase/quadrature-phase (I/Q) modulation to generate predistorted complex electronic fields. The basic theory of coordinate transformation and the CORDIC algorithm are explained in detail. The expected dispersion compensation performance for 40-Gb/s differential quadrature phase-shift keying (DQPSK) is evaluated by numerical simulations. The required number of iterations of the CORDIC algorithm and its impact on signal quality are also clarified. Simulation shows that only seven iterations are required to achieve signal quality sufficient for predistortion transmission. A practical size of 6.9-M gates is estimated to be sufficient for the large scale integration (LSI) implementation for 40-Gb/s DQPSK systems.
Sponsorship	IEEE Lasers and Electro-Optics Society Optical Society of America
Starting Page	3607
Ending Page	3613
Page Count	7
File Size	721487
File Format	PDF
ISSN	07338724
Volume Number	27
Issue Number	16
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-08-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Predistortion Optical modulation Optical transmitters Optical signal processing Optical fiber communication Optical filters Optical receivers Optical interferometry Signal processing algorithms Optical fiber dispersion signal processing optical modulation optical transmitters
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics

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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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