ABSTRACT
Orthogonal frequency division multiplexing provides strong robustness against inter carrier interference and also
it provides good performance in frequency selective channels by adaptation techniques to estimate channel
quality. An important parameter for calculating the channel performance is by signal to noise ratio (SNR) .I n this
paper, we propose a novel for SNR estimation using synchronization preambles for rician fading channels. The
preambles of periodic structure are used for efficient calculation for SNR estimation. The proposed estimator
performance is compared with previous estimators and the proposed estimator is robust against frequency
selectivity in the channel.
Keywords: - Inter Symbol Interference (ISI), Channel State Information (CSI), Cramer-Rao Bound (CRB), Fast Fourier
Transform (FFT), PS Estimator.