Christiaan Hendrik Jozef Sierens

Subcarrier multiple access for passive optical networks and comparison to other multiple access techniques

Subcarrier multiple access (SCMA) is described. It is a flexible access technique for passive optical networks (PONs), both for fiber-to-the home and fiber-to-the curb architectures. The main advantages of SCMA are the independence of the channels, which yields flexibility with respect to modulation format and evolution scenario, and the absence of synchronization between the different subscribers. Some results of SCMA experiments are presented. The capability of broadband channels is discussed, taking into account the optical interference effect. A comparison is made with other access techniques.<<ETX>>

How to upgrade CATV networks to provide interactive ATM-based services

The paper reports on work carried out within the RACE project R2121-BISIA (broadband interactive services on integrated access). It first introduces a common ATM based platform for supporting emerging interactive audio-visual services on different access types. It then describes how it is applied to CATV networks and provides details on its architecture and the key technologies enabling the introduction of ATM in CATV networks. Finally the paper describes the BISIA field trial taking place in the fall of 1995.