Performance improvement in an OFDM system with MBH combinational pulse shape

  • Authors:

  • Rajiv Saxena;Hem Dutt Joshi

  • Affiliations:

  • Department of Electronics and Communication Engineering, Jaypee University of Engineering and Technology, Raghogarh, Guna - 473226, India;Department of Electronics and Communication Engineering, Jaypee University of Engineering and Technology, Raghogarh, Guna - 473226, India

  • Venue:
  • Digital Signal Processing
  • Year:
  • 2013

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Abstract

In this paper, the Modified Bartlett-Hanning (MBH) window family is used in an OFDM system to reduce the effect of frequency offset on both the parameters i.e., the inter-carrier interference (ICI) and bit error rate (BER). The performance metric of suggested OFDM model with several Nyquist pulse shapes, including rectangular, Bartlett, raised cosine (RC) and better than raised cosine (BTRC) pulse shapes are also evaluated. These pulse shapes are found as members of the MBH pulse shape family, exactly or equivalently. It is observed that the ICI, BER and signal to interference ratio (SIR) of the OFDM system with different MBH pulse shapes are better than BTRC, RC, Bartlett and rectangular pulse shapes. The MBH pulse shape family, where different pulses can be generated by taking numerous values of the pulse shape parameter '@b', is providing a consistent advantage over the BTRC pulse shape in terms of ICI and BER in the acceptable range of carrier frequency offset along with better spectral efficiency due to their improved side-lobe levels. The other pulse shapes e.g. second order continuous window (SOCW), phase modified sinc pulse (PMSP) and Frank@?s window are also compared with proposed pulse shapes and found that the MBH family pulse shapes are equally comparable in terms of performance metric used.