Conf. on Info. Sciences and Systems, Princeton, NJ, March 2000
Decision Device Optimization for Soft Decision Feedback Equalization
J. Balakrishnan , H. Viswanathan and C.R. Johnson, Jr.
Abstract
This paper considers the use of soft decisions to mitigate error
propagation in a decision feedback equalizer (DFE). The decision
device for the soft decision feedback equalizer is optimized by
minimizing the mean-squared error (MSE) cost function defined at the
input of the decision device. Furthermore, a bit error rate (BER)
optimized soft decision device is derived for a BPSK modulation
scheme. Simulation results comparing the performance of the MSE/BER
optimized soft DFE and the conventional DFE are presented.
