Hardware

High Speed Channel Coding Architectures for the Uncoordinated or Channel

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Executive Summary

Though it promises high bandwidths, the optical medium is not popular in local area networks. This is because current optical networks do not offer the ease of use and setup that an uncoordinated multiple access network such as Ethernet offers. By careful design and implementation of high speed channel coding architectures, the authors show that it is possible for optical networks to exhibit these desirable properties while maintaining high optical transmission rates. This paper presents an Interleaver-Division Multiple Access (IDMA) architecture implemented with a rate 1/20, 64-state Viterbi decoder and a word-based interleaver. These structures allowed one to achieve optical data rates of 2Gbps in FPGA implementation and 5.4Gbps for 0.18um ASIC implementation. The techniques presented can be adapted for other similar architectures.

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