Title :
Performance bounds on the constant modulus error surface
Author :
Ogunfunmi, Tokunbo ; Jamali, Hamadi
Author_Institution :
Dept. of Electr. Eng., Santa Clara Univ., CA
Abstract :
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
Keywords :
adaptive filters; blind equalisers; boundary-value problems; channel estimation; optimisation; constant modulus error surface; lower bounds; performance bound; stationary points; upper bounds; weight vector; Adaptive algorithm; Adaptive filters; Amplitude modulation; Convergence; Distortion measurement; Equations; Error correction; Iterative algorithms; Least squares approximation; Tellurium;
Conference_Titel :
Circuits and Systems, 2006. ISCAS 2006. Proceedings. 2006 IEEE International Symposium on
Conference_Location :
Island of Kos
Print_ISBN :
0-7803-9389-9
DOI :
10.1109/ISCAS.2006.1693375
