Wireless Networks

, Volume 20, Issue 6, pp 1387–1398 | Cite as

Fractionally spaced equalizer based on dynamically varying modulus algorithm for spectrally efficient channel compensation in SC-FDMA based systems

  • K. Vinoth BabuEmail author
  • G. Ramachandra Reddy
  • J. Arun Prakash


Orthogonal frequency division multiplexing (OFDM) based wireless communication systems are expected to satisfy the thirst for ever increasing demand on higher spectral efficiency. But, OFDM systems suffer from peak to average power ratio (PAPR) and inter carrier interference (ICI) problems. It is observed that when OFDM is used in the uplink, PAPR problem is more severe and the relative mobility of the user equipments with respect to the base station will cause Doppler spread which leads to ICI. One of the solutions to minimize PAPR and ICI is single carrier frequency division multiple access. But there is a tradeoff in spectral efficiency. The main objective of this paper is to evaluate the performance of fractionally spaced equalizer (FSE) for blind channel estimation based on higher order statistics and to identify any better alternative to improve its performance. Dynamically varying modulus algorithm (DVMA) based FSE is proposed in this paper which is a better alternative for supervised equalization. The simulation results prove that FSE blind equalizer based on DVMA outperform the conventional supervised and blind equalizers.


Constant modulus algorithm (CMA) Modified constant modulus algorithm (MCMA) DVMA FSE Symbol rate equalizer (SRE) 



Global system for mobile communication time division multiple access


Wideband code division multiple access


Long term evolution


Long term evolution-advanced


Worldwide interoperability for microwave access


Inter symbol interference




Cyclic prefix


Adaptive modulation and coding


Multi input and multi output


Quadrature amplitude modulation


Least square


Minimum mean square error


Recursive least square


Least mean square


Normalized least mean square


Symbol error rate


Carrier frequency offset


Additive white gaussian noise


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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • K. Vinoth Babu
    • 1
    Email author
  • G. Ramachandra Reddy
    • 1
  • J. Arun Prakash
    • 1
  1. 1.School of Electronics EngineeringVIT UniversityVelloreIndia

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