NDLI: A high-speed OQPSK module with direct modulation mode in RF

Content Provider	IEEE Xplore Digital Library
Author	Zhao Hui Sun Hui-xian Xie Chun-jian Hao Wei
Copyright Year	2004
Description	Author affiliation: Center for Space Sci. & Appl. Res., Graduate Sch. of Chinese Acad. of Sci., Beijing, China (Zhao Hui; Sun Hui-xian; Xie Chun-jian; Hao Wei)
Abstract	The work presents an efficient satellite OQPSK (offset QPSK) module of direct modulation in RF. The module's modulation rate can reach 150 Mbps in L band, or 600 Mbps in X band. Compared to the conventional QPSK, the main difference of OQPSK is that its Q-channel digits lag behind the I-channel digits by one half symbol. Thus, OQPSK avoids the 180/spl deg/ phase transitions and therefore has the better power spectrum. The direct modulation in RF is also superior to the conventional IF modulation in terms of structure and reliability. The paper also introduces a time-series analysis method, signal integrity simulation and some design fundamentals for high-speed printed circuit boards involved in the module.
Starting Page	304
Ending Page	307
File Size	565102
Page Count	4
File Format	PDF
ISBN	0780385624
DOI	10.1109/ICCEA.2004.1459352
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-11-01
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Radio frequency Satellites Transmission lines Time series analysis Tires Sun Signal design Quadrature phase shift keying Clocks Propagation delay
Content Type	Text
Resource Type	Article

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