An Improved Preamble-based SNR Estimation Algorithm for OFDM Systems


M. Zivkovic, R. Mathar,


        A crucial parameter required for adaptive transmission in orthogonal frequency division multiplexing (OFDM)
systems is the signal-to-noise ratio (SNR). In this paper, certain modifications to previously proposed preamble-based SNR estimator for wireless OFDM systems are suggested in order to improve estimation performance. Proposed modifications, related to DFT interpolation, are based on the adaptive selection of
significant channel impulse response (CIR) paths utilizing the average noise power estimate obtained in frequency domain. The modified estimator shows performance improvement of average
SNR estimation in low SNR regime and considerably outperforms original algorithm for SNR per subcarrier estimation.

BibTEX Reference Entry 

	author = {Milan Zivkovic and Rudolf Mathar},
	title = "An Improved Preamble-based SNR Estimation Algorithm for {OFDM}  Systems",
	pages = "172-176",
	booktitle = "21st International Symposium on  Personal, Indoor and Mobile Radio Communications ({IEEE} PIMRC)",
	address = {Istanbul, Turkey},
	month = Sep,
	year = 2010,
	hsb = hsb999910015920,


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