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Proceedings Paper

Implications of encoder/modulator/phased-array designs for future broadband LEO communications
Author(s): Chris A. Jensen; John D. Terry; Mark J. Vanderaar
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Paper Abstract

In this paper we summarize the effects of modulation and channel coding on the design of wide angle scan, broadband, phased array antennas. In the paper we perform several trade studies. First, we investigate the amplifier back-off requirement as a function of variability of modulation envelope. Specifically, we contrast constant and non-constant envelope modulations, as well as single and multiple carrier schemes. Additionally, we address the issues and concerns of using pulse shaping filters with the above modulation types. Second, we quantify the effects of beam steering on the quality of data recovery using selected modulation techniques. In particular, we show that the frequency response of the array introduces intersymbol interference for broadband signals and that the mode of operation for the beam steering controller may introduce additional burst or random errors. Finally, we show that the encoder/modulator design must be performed in conjunction with the phased array antenna design.

Paper Details

Date Published: 23 January 1998
PDF: 12 pages
Proc. SPIE 3232, Wireless Technologies and Systems: Millimeter-Wave and Optical, (23 January 1998); doi: 10.1117/12.301035
Show Author Affiliations
Chris A. Jensen, Raytheon TI Systems (United States)
John D. Terry, Raytheon TI Systems (United States)
Mark J. Vanderaar, NYMA, Inc. (United States)


Published in SPIE Proceedings Vol. 3232:
Wireless Technologies and Systems: Millimeter-Wave and Optical
Paul Christopher; Leland Langston; G. Stephen Mecherle, Editor(s)

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