Home // ICDS 2013, The Seventh International Conference on Digital Society // View article

Low Complexity Estimation of Frequency Offset for OFDM Systems

Authors:
Jaewoo Lee
Youngpo Lee
Jeongyoon Shim
Youngseok Lee
Seokho Yoon

Keywords: OFDM; frequency offset estimation; threshold; coherence phase bandwidth; low complexity

Abstract:
A frequency offset caused by the Doppler shift or the mismatch of the oscillators destroys orthogonality between the subcarriers in the orthogonal frequency division multiplexing (OFDM) signals. This paper proposes a frequency offset estimation scheme with low complexity for OFDM systems. Specifically, we use the coherence phase bandwidth to overcome the effect of timing offset and employ a threshold to estimate the frequency offset with low complexity. In addition, we also propose a timing offset estimation scheme as a next stage of the frequency offset estimation. Numerical results demonstrate that the proposed scheme can estimate frequency offset with lower computational complexity and does not require additional memory while maintaining the same level of estimation performance in terms of error variance.

Pages: 37 to 41

Copyright: Copyright (c) IARIA, 2013

Publication date: February 24, 2013

Published in: conference

ISSN: 2308-3956

ISBN: 978-1-61208-249-3

Location: Nice, France

Dates: from February 24, 2013 to March 1, 2013