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23 January 1998 Implications of encoder/modulator/phased-array designs for future broadband LEO communications
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Proceedings Volume 3232, Wireless Technologies and Systems: Millimeter-Wave and Optical; (1998) https://doi.org/10.1117/12.301035
Event: Voice, Video, and Data Communications, 1997, Dallas, TX, United States
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.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Chris A. Jensen, John D. Terry, and Mark J. Vanderaar "Implications of encoder/modulator/phased-array designs for future broadband LEO communications", Proc. SPIE 3232, Wireless Technologies and Systems: Millimeter-Wave and Optical, (23 January 1998); https://doi.org/10.1117/12.301035
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