Thomas G. Macdonald

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In large multiuser systems, such as communications satellites, the dynamic allocation of resources enables the system to simultaneously maximize usable throughput and provide acceptable communications quality to all users. In this paper the dynamic allocation problem for satellite communications is discussed. We present a multiple-rate time division(More)
Citation Dastangoo, S. et al. " Performance analysis of distributed time division multiple access protocols in mobile ad hoc environments. Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available.(More)
Mobile cellular CDMA networks for tactical applications require mobile base stations in order to provide communications on the moue. Because of the mobility of the base stations , power balancing among the transmitters at different base stations is more dificult than in commercial cellular CDMA systems. Handoff of mobiles among base stations is also more(More)
The processing that is often employed in receivers for qua-ternay direct-sequence spread-spectrum communications operates separately on the inphase and quadrature components of the spread-spectrum signal. Recent results on quaternary complex sequences, which are also referred to as four-phase sequences, provide a strong motivation to emplo~ processing(More)