Pilot based pre FFT signal to noise ratio estimation for OFDM systems in Rayleigh-fading channel

Khan, A.M. and Jeoti, V. and Azman Zakariya, M. (2015) Pilot based pre FFT signal to noise ratio estimation for OFDM systems in Rayleigh-fading channel. Lecture Notes in Electrical Engineering, 315. pp. 171-182.

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Abstract

In design of adaptive orthogonal frequency division multiplexing (OFDM) transmission, Signal-to-Noise Ratio (SNR) is well-known to be an informative performance measures. Channel impairments, specifically in wireless communication degrade the performance of accurate SNR measurement and said problem becomes more serious in low SNR regime. As a result it reduces the performance of adaptive transmission in OFDM systems. To alleviate this problem we develop a pilot based Pre FFT (time domain) Signal-to-Noise Ratio (SNR) estimator in the presence of frequency selective Rayleigh fading channel. A novel time domain SNR estimation technique is proposed that accurately measures the Signal-to-Noise Ratio in low SNR regime, where signal plus noise power is evaluated by using autocorrelation of received signal and signal power is indirectly estimated from pilot power using cross correlation. Simulation results show that proposed method has very less bias and very close to the actual SNR values. © Springer International Publishing Switzerland 2015.

Item Type: Article
Impact Factor: cited By 2
Uncontrolled Keywords: Fading channels; Fast Fourier transforms; Frequency estimation; Frequency selective fading; Orthogonal frequency division multiplexing; Rayleigh fading; Time domain analysis; Wireless telecommunication systems, Adaptive transmission; Channel impairment; Frequency selective Rayleigh fading channels; Performance measure; Rayleigh-fading channel; Signal to noise ratio estimation; Signaltonoise ratio (SNR); Wireless communications, Signal to noise ratio
Depositing User: Ms Sharifah Fahimah Saiyed Yeop
Date Deposited: 30 Aug 2021 07:06
Last Modified: 30 Aug 2021 07:06
URI: http://scholars.utp.edu.my/id/eprint/26307

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