Title :
A convex semi-blind cost function for equalization in short burst communications
Author :
Au, Kelvin K. ; Hatzinakos, Dimitrios
Author_Institution :
Dept. of Electr. & Comput. Eng., Toronto Univ., Ont., Canada
Abstract :
In short burst wireless communications, a training sequence is incorporated in each burst for the receiver to adjust the equalizer coefficients. However, when the amount of training symbols is less than the spatial-temporal equalizer tap weights, conventional least-square techniques may not provide good MSE performance. Blind methods, on the other hand, may not achieve equalization in a short burst. A regularized semi-blind algorithm was proposed previously to overcome this problem but local minima exist in the algorithm. A convex cost with training symbols as the equalizer constraint is proposed in this paper to avoid cost-dependent local minima. Furthermore, comparison with the regularized semi-blind algorithm suggests that the proposed algorithm achieves a lower MSE performance in the case of nonconstant modulus signals such as 16-QAM signals
Keywords :
blind equalisers; cellular radio; mean square error methods; quadrature amplitude modulation; 16-QAM signals; MSE performance; blind equalization; convex cost function; nonconstant modulus signals; semi-blind cost function; short burst wireless communications; training sequence; training symbols; Additive white noise; Blind equalizers; Cost function; Delay; Finite impulse response filter; Gold; Information rates; Kelvin; Sensor arrays; Wireless communication;
Conference_Titel :
Statistical Signal and Array Processing, 2000. Proceedings of the Tenth IEEE Workshop on
Conference_Location :
Pocono Manor, PA
Print_ISBN :
0-7803-5988-7
DOI :
10.1109/SSAP.2000.870104