Abstract
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 language | English |
|---|---|
| Article number | 4786478 |
| Pages (from-to) | 45-50 |
| Number of pages | 6 |
| Journal | IEEE Transactions on Wireless Communications |
| Volume | 8 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2009 Jan 1 |
All Science Journal Classification (ASJC) codes
- Computer Science Applications
- Electrical and Electronic Engineering
- Applied Mathematics
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Kim, S., Yu, H., Lee, J., & Hong, D. (2009). Low bias frequency domain SNR estimator using DCT in mobile fading channels. IEEE Transactions on Wireless Communications, 8(1), 45-50. [4786478]. https://doi.org/10.1109/T-WC.2009.071386