论文信息 - Spread spectrum FDMA over high speed TDM transmission system for multimedia satellite communications

Spread spectrum FDMA over high speed TDM transmission system for multimedia satellite communications

It is desired to realize high speed portable wireless terminals that offer a rapid network access anytime and anywhere. Satellite communications have the potential to realize such terminals because of its wide coverage area. This paper proposes a superposed spread spectrum FDMA (SS-FDMA) signaling over a high speed TDM signal transmission scheme to realize A4 size portable user terminals. Feasibility studies of a multimedia satellite communication system employing the proposed scheme are also described. Under present satellite performance and interference conditions, it is clarified that the system can achieve the following performance: the SS-FDMA signal speed for the access link is about 9.6 kbit/s, the TDM signal speed for the supply link is about 8 Mbit/s and the capacity of simultaneous SS-FDMA signal transmitting terminals is about 256.

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