Towards 100 Gbps wireless communication: Energy efficiency of ARQ, FEC, and RF-frontends

The paper introduces recent results of 100 Gbps wireless transceiver design. Furthermore, energy for retransmissions and forward error correction is compared. The presented model estimates energy boundaries, when the fragment selective retransmissions are more energy efficient than forward error correction (FEC). In the targeted system, the FEC is relatively expensive and the FEC mode with the highest throughput is not optimal in terms of consumed energy per bit. Moreover, we compare energy efficiency of our data link layer processor to the energy required to transmit a single bit on the physical layer. In most cases, gain obtained by forward error correction consumes more energy than the gain obtained by power amplifiers in the terahertz band.