The constant modulus (CM) error surface is multimodal in nature. This leads to possibility of convergence to undesired local minima. Recently, we characterized the various stationary points associated with the CM error surface. In this paper we make use of the stationary points to develop upper and lower bounds on the weight vector, ordering the minima and obtaining a bound on the excess weight error. The simulation results agree with the bounds derived.
['Tokunbo Ogunfunmi', 'Hamadi Jamali']
Performance bounds on the constant modulus error surface