Pseudohexadecimal near maximum likelihood detector

This paper introduces two newly developed near-maximum likelihood detectors, named pseudohexadecimal and modified pseudohexadecimal near-maximum likelihood detectors. These two detectors are tested against a pseudoquaternary near-maximum likelihood detector using data transmission at 9.6 kb/s over a telephone channel. Simulation results demonstrate that the performance of the pseudohexadecimal detector is better than the performance of the modified pseudohexadecimal detector, and the latter is better than the pseudoquaternary detector.