|
Abstract
|
Article Information:
Adaptive Constant Modulus Blind Equalization with Variable Step-Size Control by Error Power
Ying Xiao and Yuhua Dong
Corresponding Author: Ying Xiao
Submitted: March 19, 2012
Accepted: April 06, 2012
Published: October 15, 2012 |
Abstract:
|
A variable step-size control by error power was proposed to improve the performance of adaptive
constant modulus blind equalization algorithm based on the analysis of the cost function. In the Constant
Modulus Algorithm (CMA), large step-size can achieve faster convergence rate, but the steady-state residual
error is big, on the contrary, small step-size can achieve higher convergence precision, but the convergence rate
is slow. A triangle inequality can be set up according to the cost function of CMA and the power of error and
signal can be estimated by exponential decay window, then the attenuation function can be obtained to control
the step-size change. Meanwhile, the threshold is set to reset the step-size to ensure the tracking performance
when the channel has burst interference. Computer simulation results prove the effectiveness of the proposed
algorithm.
Key words: Blind equalization , burst interference , constant modulus algorithm, error power, variable step-size, ,
|
|
Abstract
|
PDF
|
HTML |
|
Cite this Reference:
Ying Xiao and Yuhua Dong, . Adaptive Constant Modulus Blind Equalization with Variable Step-Size Control by Error Power. Research Journal of Applied Sciences, Engineering and Technology, (20): 4122-4125.
|
|
|
|
 |
ISSN (Online): 2040-7467
ISSN (Print): 2040-7459 |
 |
| Information |
|
|
|
|
| Sales & Services |
|
|
|
|
