KMITL

Permanent URI for this communityhttps://dspace.kmitl.ac.th/handle/123456789/1

Browse

Settings

Author: search.filters.author.Charoenphol, A.

Search Results

Now showing 1 - 4 of 4
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Variable forgetting factor RLS adaptive equalizer for DS-CDMA system
    (2011-09-01)
    Charoenphol, A.
    ;
    Benjangkaprasert, C.
    In this paper, a variable forgetting factor RLS adaptive equalizer is proposed for direct sequence code division multiple access (DS-CDMA) communication system. We consider an adaptive Laguerre lattice equalizer which applies an optimal method based on the variable step-size least mean square (VSLMS) algorithm for adaptable forgetting factor RLS algorithm for improve performance of the receiver. © 2011 IEEE.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Unbiased plain gradient adaptive IIR notch filter for echo cancellation
    (2011-09-01)
    Dhanawan, S.
    ;
    Charoenphol, A.
    ;
    Benjangkaprasert, C.
    An adaptive echo canceller based on adaptive IIR notch filter with unbiased plain gradient algorithm is proposed, for the echo cancellation in telephone network. The unbiased plain gradient algorithm employs the bias removal techniques to remove the bias existing in the estimated parameter, resulting in obtaining good estimate of parameter for the echo canceller. Simulation results show that the proposed canceller outperforms the canceller with the classical LMS algorithm in terms of echo return loss enhancement (ERLE). © 2011 IEEE.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Adaptive forgetting factor RLS algorithm equalizer for DS-CDMA system based on adaptive Laguerre lattice filter
    (2011-08-12)
    Charoenphol, A.
    ;
    Inchan, T.
    ;
    Benjangkaprasert, C.
    A new RLS adaptive algorithm with variable forgetting factor for direct sequence code division multiple access (DS-CDMA) communication system is presented. Intersymbol interference (ISI) arises due to multipath propagation, which destroys the code orthogonality, gives rise to multiple access interference(MAI). Therefore, the objective of this paper is to minimize the effect of ISI with a long impulse response environment based on the proposed receiver. We consider an adaptive Laguerre lattice equalizer which applies an optimal method based on the variable step-size least mean square (VSLMS) algorithm for adaptable forgetting factor RLS algorithm to improve bit error rate (BER) performance of the receiver. © 2011 IEEE.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Adaptive equalization for DS-CDMA multi-user communication system based on adaptive Laguerre lattice filter
    (2010-12-01)
    Charoenphol, A.
    ;
    Lertwatechakul, M.
    ;
    Benjangkaprasert, C.
    This paper deals with an adaptive equalizer based on Laguerre lattice filter and the recursive least square (RLS) adaptive algorithm for direct sequence-code division multiple access (DS-CDMA) communication system. Intersymbol interference (ISI) arises due to multipath propagation, which destroys the code orthogonality, gives rise to multiple access interference(MAI). Therefore, the objective of this paper is to minimize the effect of ISI with a long impulse response environment based on the proposed receiver. Because of the stability of Laguerre structure is sharing the characteristic of finite impulse response (FIR) filter and infinite impulse response (IIR) filter and the low sensitively of lattice filter is an attractive characteristic. Therefore, we propose the adaptive equalization based on adaptive Laguerre lattice filter for improve the bit error rate (BER) performance of the receiver. Our simulation results show that the performance of the proposed receiver in terms of BER and the stability are better than the conventional Laguerre filter and FIR filter receivers. ©ICROS.