Design of Block-By-Block Transceivers with Successive Detection

Block-by-block transceivers are commonly used to simplify the task of transmitting data over dispersive channels. In this paper, we consider the design of the transmitter-receiver pair in a block-by-block system which employs successive detection and interference cancellation at the receiver. (Such receivers are sometimes called block-decision feedback equalizers). We derive lower bounds on the mean-square error (MSE) of the equalizer's output and the bit-error rate (BER) at moderate-to-high SNRs (in the absence of error propagation). These lower bounds guide us towards a closed form expression for a transceiver whose performance is close to these lower bounds. Simulation studies-indicate that our transceiver performs significantly better than standard transceivers and retains its performance advantages in the presence of error propagation.