Spread-spectrum techniques for the provision of packet access on the reverse link of next-generation broadband multimedia satellite systems

This papermill examine the potential performances of soread-spectrum-based access techniques via the interaction channel of an Internet protocol (IP)-based multimedia satellite System. In,particular, a theoretical analysis of the spread-Aloha technique will be given for the case of forward error correction coded systems. Then, the performance of spread-Aloha access will be confirmed by simulation and compared With that of a conventional time-division. multiple-access (TDMA)-based combined free/demand assignment multiple-access system. It appears that spread-Aloha-based techniques, although achieving a lower maximum throughput than the, TDMA-based access scheme, may provide a better experience to the us,er due, to the lower transmission latency. Finally, the prospect of a spread-spectrum-based access scheme combining Aloha and reservation mechanisms will be briefly overviewed.