Electrical code-division multiplexing for low-cost optical subscriber loops

In this paper a novel low-cost method for realization of the upstream channel in optical subscriber loops is investigated, based on synchronous code-division multiplexing (CDM) and block interleaving. To prove the performance of the proposed system concept the influence of different sequences and the combination with forward error correction (FEC) is examined. Moreover, the implementation of a multi-user receiver is suggested which combines block interleaver and matched filter.