Low bias frequency domain SNR estimator using DCT in mobile fading channels

Sungtae Kim, Hyunkyu Yu, Jemin Lee, Daesik Hong

Research output: Contribution to journalArticle

9 Citations (Scopus)


The authors analyze the cause of bias in a fast Fourier transform (FFT)-based frequency domain signal-to-noise ratio (SNR) estimator by deriving the upper bound of the bias. The analysis is then used to propose a new frequency domain estimator using discrete cosine transform (DCT), which has lower bias. In addition, a criterion is proposed for use when maximum Doppler frequency information is available; it is based on the derived upper bound and can be used to improve the mean squared error (MSE) performance of the proposed DCT-based estimator. Simulation results show that the proposed estimator reduces the MSE remarkably by diminishing the bias.

Original languageEnglish
Article number4786478
Pages (from-to)45-50
Number of pages6
JournalIEEE Transactions on Wireless Communications
Issue number1
Publication statusPublished - 2009 Jan 1

All Science Journal Classification (ASJC) codes

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

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