Design of a CC-MC-CDMA System for Gigabit DSL (GDSL)

With the introduction of VDSL2 and the implementation of Fibre-to-the-Curb (FTTC), the theoretical limit of Digital Subscriber Line (DSL) technology is pushed even further than currently known ADSL2+ technology. Current research is investigating the possibility of symmetric DSL at 1 Gbps (GDSL). This paper addresses the design, as well as a feasibility study, of a complete complementary multi-carrier code-division multiple access (CC-MC-CDMA) transceiver system. This fully functional modem combines the virtues of both orthogonal frequency division multiplexing (OFDM) and conventional code division multiple access (CDMA) to support many users simultaneously with higher spectral efficiencies than conventional CDMA systems and better noise tolerance than existing DSL solutions. We also determine the capacity of the CC-MC-CDMA system.