Title :
A modified hybrid dual-mode blind equalization algorithm for high-order QAM signals
Author :
Li, Chisheng ; Xu, Shuliang ; Dong, Wenjuan ; Luo, Hanwan
Author_Institution :
Dept. of Electron. Eng., Shanghai Jiaotong Univ., Shanghai, China
Abstract :
This paper presents a modified hybrid dual-mode blind equalization algorithm for high-order QAM signals. In the blind startup mode, the algorithm adds a constellation matching error (CME) to the cost function of extended constant modulus algorithm (ECMA) to improve the ECMA´s performance. Then switch to Directed Decision (DD) algorithm as the tracking mode to improve the restraining precision. Computer simulation results show that the algorithm has the faster convergence rate, lower steady-state error and can compensate the phase offset automatically.
Keywords :
blind equalisers; quadrature amplitude modulation; blind startup mode; constellation matching error; cost function; directed decision algorithm; extended constant modulus algorithm; hybrid dual-mode blind equalization; phase offset; quadrature amplitude modulation; tracking mode; Bandwidth; Blind equalizers; Computer errors; Convergence; Cost function; Intersymbol interference; Quadrature amplitude modulation; Robust stability; Steady-state; Switches; Blind Equalization; CME; ECMA; Hybrid Dual-Mode; QAM;
Conference_Titel :
Wireless Communications & Signal Processing, 2009. WCSP 2009. International Conference on
Conference_Location :
Nanjing
Print_ISBN :
978-1-4244-4856-2
Electronic_ISBN :
978-1-4244-5668-0
DOI :
10.1109/WCSP.2009.5371562
