scholarly journals Variable-step-size LMS adaptive filter for digital chromatic dispersion compensation in PDM-QPSK coherent transmission system

2009 ◽  
Author(s):  
Tianhua Xu ◽  
Gunnar Jacobsen ◽  
Sergei Popov ◽  
Jie Li ◽  
Ke Wang ◽  
...  
Keyword(s):  
Adaptive Filter ◽  
Dispersion Compensation ◽  
Chromatic Dispersion ◽  
Transmission System ◽  
Variable Step Size ◽  
Step Size ◽  
Variable Step ◽  
Coherent Transmission

Variable step-size sign subband adaptive filter with subband filter selection

2018 ◽  
Vol 152 ◽  
pp. 141-147 ◽  
Author(s):  
Jaegeol Cho ◽  
Hyun Jae Baek ◽  
Bum Yong Park ◽  
JaeWook Shin
Keyword(s):  
Adaptive Filter ◽  
Variable Step Size ◽  
Step Size ◽  
Variable Step ◽  
Subband Adaptive Filter ◽  
Filter Selection

Variable Step Size LMS Algorithm Based on Two Cooperative Adaptive Filters

2011 ◽  
Vol 268-270 ◽  
pp. 1168-1172
Author(s):  
Qing Feng Wang ◽  
Chuan Lin
Keyword(s):  
Adaptive Filter ◽  
Adaptive Filters ◽  
Lms Algorithm ◽  
Variable Step Size ◽  
Step Size ◽  
Output Noise ◽  
Variable Step ◽  
Tracking Ability ◽  
New Algorithms ◽  
Current Stage

A new variable step size LMS algorithm (CoLMS algorithm) based on two cooperative adaptive filters was proposed. In the CoLMS algorithm, the step size of each component filter was adjusted according to the comparison result of the two component filters’ performance at current stage. And the output of the better component adaptive filter was chosen as that of the overall adaptive filter. The CoLMS algorithm is not sensitive to the magnitude of the output noise and has a good tracking ability in the stationary or slowly changed environment. In order to further improve the tracking ability of CoLMS in abruptly changed environment, a modified CoLMS algorithm is also presented. The efficiency of the new algorithms is verified by the simulation results in system identification under the noises of different magnitudes.

A transform domain LMS adaptive filter with variable step-size

2002 ◽  
Vol 9 (2) ◽  
pp. 51-53 ◽  
Author(s):  
R.C. Bilcu ◽  
P. Kuosmanen ◽  
K. Egiazarian
Keyword(s):  
Adaptive Filter ◽  
Variable Step Size ◽  
Transform Domain ◽  
Step Size ◽  
Variable Step
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