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Noise Plus Interference Power Estimation in Adaptive OFDM Systems
 

Summary: Noise Plus Interference Power Estimation in
Adaptive OFDM Systems
Tevfik Y¨ucek and H¨useyin Arslan
Department of Electrical Engineering, University of South Florida
4202 E. Fowler Avenue, ENB-118, Tampa, FL, 33620
yucek@eng.usf.edu and arslan@eng.usf.edu
Abstract-- Noise variance and signal-to-noise ratio (SNR) are
important parameters for adaptive orthogonal frequency division
multiplexing (OFDM) systems since they serve as a standard
measure of signal quality. Conventional algorithms assume that
the noise statistics remain constant over the OFDM frequency
band, and thereby average the instantaneous noise samples to
get a single estimate. In reality, noise is often made up of
white Gaussian noise along with correlated colored noise that
affects the OFDM spectrum unevenly. This paper proposes an
adaptive windowing technique to estimate the noise power that
takes into account the variation of the noise statistics across
the OFDM sub-carrier index as well as across OFDM symbols.
The proposed method provides many local estimates, allowing
tracking of the variation of the noise statistics in frequency

  

Source: Arslan, Hüseyin - Department of Electrical Engineering, University of South Florida

 

Collections: Engineering