Adaptive blind equalization has gained widespread use in
communication systems that operate without training signals.
In particular, the constant modulus algorithm (CMA) has
become a favorite of practitioners due to its LMS-like
complexity and desirable robustness properties. The desire
for further reduction in computational complexity has
motivated signed-error versions of CMA, which have been
found to lack the robustness properties of CMA. This paper
presents a simple modification of signed-error CMA, based on
the judicious use of dither, that results in an algorithm
with robustness properties closely resembling those of CMA.
We establish the fundamental transient and steady-state
properties of dithered signed-error CMA and compare them
with those of CMA
