A fractionally spaced DFE with exponential step-size LMS algorithm

Type :

Term papers

Pages :

4 pages

Format :

.pdf

Published date :

10/08/2009

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Summary :

 
 

Table of Contents A fractionally spaced DFE with exponential step-size LMS algorithm Table of Contents

 
  1. Abstract
  2. Introduction
  3. Overview of AN FS-ADFE
  4. Adaptation of algorithm
    1. Adaptation techniques in equalizers
    2. Adaptation algorithm n the proposed FS-ADFE
  5. x/4 -DQPSK modem
  6. Implementational issues
    1. Equalizer implementation
  7. Results and discussions
  8. Conclusions
  9. References

Abstract

In a multi path environment within time disruptive channels, modulation bandwidth greater than the coherence bandwidth of the radio channel introduces inter symbol interference (ISI) resulting into high bit error rate (BER) [1]. The performance of communication links under such hostile conditions could be improved by employing an adaptive equalizer at the front end of the demodulator [2]. Adaptive decision feedback equalizer (Adfe) is one such equalizer which operates with the principle that once the value of the current symbol is determined, the ISI contribution of that symbol to future symbols can be estimated and removed. The mean square error of an Adfe is always smaller than that of an adaptive linear transversal equalizer unless the channel is ideal [3].

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About the author :

pencil image Vijay P. Director of Shri HDG MBA College
Level :General public Study : Management School/University : Saurashtra University

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