A High-Efficiency Carrier Estimator for OFDM Communications

Liu H., TÜRELİ M. S. U.

IEEE COMMUNICATIONS LETTERS, vol.2, no.4, pp.104-106, 1998 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 2 Issue: 4
  • Publication Date: 1998
  • Doi Number: 10.1109/4234.664219
  • Journal Name: IEEE COMMUNICATIONS LETTERS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.104-106
  • Yıldız Technical University Affiliated: No

Abstract

While multipath induced phase rotations can be dealt with differential encoding in orthogonal frequency division multiplexing (OFDM) communications, the loss of orthogonality due to the carrier offset must be compensated before discrete Fourier transform (DFT)-based demodulation can be performed. In this letter, we present a high-performance/low-complexity blind carrier offset estimation algorithm by exploiting intrinsic structure information of OFDM signals. The algorithm offers the accuracy of a super resolution subspace method, viz. MUSIC, without involving computationally intensive subspace decompositions.