"A novel equalizer structure capable of correcting channel distortion for two-dimensional
modulations with coherent demodulation was presented. Based on the fact that the phase of the in-phase
and quadrature sinusoids in the receiver must be synchronized to the phase shift introduced by the
communication channel, a structure using a pair of real-valued equalizers, one for the in-phase and the
other for the quadrature channels, was developed in this paper. Conventional approaches in this regard
use structures with complex-valued arithmetic and thus call for a much higher computational complexity.
Due to the fact that only real-valued arithmetic is needed for the new structure, a saving of 50%
multiplications, compared to its complex-valued counterpart, is thus achieved even with a better symbol
error rate performance. A more-with-less approach is thus obtained by using the new approach.
Computer simulation results justified the assertions made in this paper."
International Journal of Electronics, Communication & Instrumentation Engineering Research and Development