Open AccessDesign studies for ASIC implementations of 28 GS/s optical QPSK- and 16-QAM-OFDM transceivers
Author(s) -
Rachid Bouziane,
Peter Milder,
Robert Koutsoyannis,
Y. Benlachtar,
James C. Hoe,
Markus Püschel,
Madeleine Glick,
Robert I. Killey
Publication year - 2011
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.020857
Subject(s) - transceiver , phase shift keying , orthogonal frequency division multiplexing , electronic engineering , quadrature amplitude modulation , digital signal processing , computer science , qam , multiplexing , application specific integrated circuit , clipping (morphology) , cmos , bit error rate , computer hardware , telecommunications , engineering , channel (broadcasting) , linguistics , philosophy
We designed at the register-transfer-level digital signal processing (DSP) circuits for 21.8 Gb/s and 43.7 Gb/s QPSK- and 16-QAM-encoded optical orthogonal frequency division multiplexing (OFDM) transceivers, and carried out synthesis and simulations assessing performance, power consumption and chip area. The aim of the study is to determine the suitability of OFDM technology for low-cost optical interconnects. Power calculations based on synthesis for a 65 nm standard-cell library showed that the DSP components of the transceiver (FFTs, equalisation, (de)mapping and clipping/scaling circuits) consume 18.2 mW/Gb/s and 12.8 mW/Gb/s in the case of QPSK and 16-QAM respectively.