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ESTIMATION OF FREQUENCY SELECTIVITY FOR OFDM BASED NEW GENERATION WIRELESS COMMUNICATION SYSTEMS
 

Summary: ESTIMATION OF FREQUENCY SELECTIVITY FOR OFDM BASED NEW
GENERATION WIRELESS COMMUNICATION SYSTEMS
H¨useyin Arslan and Tevfik Y¨ucek
Electrical Engineering Department, University of South Florida
4202 E. Fowler Avenue, ENB-118, Tampa, FL, 33620
Abstract
In this paper, estimation of both global (long term) and local (in-
stantaneous) frequency selectivity and rms delay spread of wireless
communication channel are investigated. A practical algorithm for
averaged channel frequency correlation estimation, which is used for
measuring frequency selectivity, is given. Average rms delay spread
of the channel is calculated from the channel frequency correlation es-
timate. For measuring local frequency selectivity, channel frequency
response estimate is exploited. Time domain channel impulse re-
sponse is obtained by taking IFFT of the sampled channel frequency
response. Optimal sampling rate of the estimated channel response
is investigated. Performance of the estimates are obtained in noise
limited situations. The effect of noise variance and robustness of the
estimates against different channel power delay profiles is discussed
for global parameter estimation. For local parameter estimation, the

  

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

 

Collections: Engineering