The Comparative Study of Adaptive Channel Equalizer Based on Fixed and Variable Step - Size LMS Algorithm & its Variants for Non Stationery Wireless Channel
|International Journal of Engineering Trends and Technology (IJETT)||
|© 2013 by IJETT Journal|
|Year of Publication : 2013|
|Authors : Darshna Kundu , M.K.Jain|
Darshna Kundu , M.K.Jain."The Comparative Study of Adaptive Channel Equalizer Based on Fixed and Variable Step - Size LMS Algorithm & its Variants for Non Stationery Wireless Channel ". International Journal of Engineering Trends and Technology (IJETT). V4(6):2447-2452 Jun 2013. ISSN:2231-5381. www.ijettjournal.org. published by seventh sense research group.
the performance of modern communication system can be reduced by non ideal characteristic of the channel, which is known as inter - symbol interference (ISI).The equalization technique is an efficient method to overcome ISI and improve the characteristics of the system. Adaptive linear filter and various categories of training algorithms are used to imitate different equalizer models. . Here we have simulated a digital communication model having quadrature amplit ude modulation technique and additive white Gaussian noise channel implemented in MATLAB where Equalizer plays major role in this model. This paper presents the comparison of performance of linear & non linear adaptive channel equalizer trained by using gr adient decent algorithm LMS & its variants such as NLMS, FBLMS, and SRLMS with fixed & variable step size in terms of Bit Error Rate (BER). Inspite of much prior work on this subject we reveal surprising analytical results in terms of well known BER
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LMS, NLMS, FBLMS, BER Algorithm, Channel Equalization, DFE, VSSLMS