Modified Blind Equalization Algorithm for Underwater Acoustic Channel
Dacheng Liu · Audio Engineering · 2013
For the multipath underwater acoustic channel producing serious inter symbol interference problem,an improved constant modulus blind equalization algorithm is proposed. The algorithm combines the variable step size theory and momentum algorithm to accelerate the convergence rate,and uses the real part and imaginary part of cost function calculating respectively to correct the phase rotation caused by the underwater acoustic channel. The simulation result shows that, the algorithm is able to recover the phase rotation caused by the underwater acoustic channel and has faster convergence rate and lower residual inter symbol interference.