Architecture and implementation of fading compensation for dynamic spectrum access wireless communication systems

  • Authors:

  • Masahide Hatanaka;Toru Homemoto;Takao Onoye

  • Affiliations:

  • Department of Information Systems Engineering, Osaka University, Suita, Osaka, Japan;Department of Information Systems Engineering, Osaka University, Suita, Osaka, Japan;Department of Information Systems Engineering, Osaka University, Suita, Osaka, Japan

  • Venue:
  • VLSI Design
  • Year:
  • 2013

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Abstract

This paper proposes an efficient architecture and implementation of fading compensation dedicated to dynamic spectrum access (DSA) wireless communication. Since pilot subcarrier arrangements are adaptively determined in wireless communication systems with DSA, the proposed architecture employs piecewise linear interpolation to the channel response estimation for data subcarriers in order to increase the channel estimation accuracy. The fading compensation for an orthogonal frequency-division multiplexing (OFDM) symbol isperformedwithinthe time foroneOFDMsymbol tomake increase of latency smaller. Theproposedarchitecture guarantees real-time processing with 76MHz or higher clock frequency. The FPGA implementation of the proposed architecture occupies 1,577 slices and works up to 121MHz.