Single-hop connection methods, which establish direct mobile to mobile communication links in the existing domestic mobile satellite communications system, are investigated. The difficulty for the single-hop connection stems from the PDC frame format, in which traffic and control channels reside in one frame. Two single-hop connection methods, based on a non-regenerative transponder satellite and a regenerative transponder satellite, are derived and evaluated in accordance with the required functionality on mobile terminal, base station and satellite. In each of the two methods, the satellite transponder has to involve such circuit as narrow-band filter bank, channel switch and beam switch. A regenerative transponder satellite has to have MODEM and frame decompose/compose circuits, additionally. Those circuits can be build by applying digital signal processing technology with relatively small circuit under a given satellite life time and space environment.
|ジャーナル||NTT R and D|
|出版ステータス||Published - 2002 1 1|
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