Paper Info
Title
Describing the optimum pilot symbol interval via curve fitting methods in OFDM system
Abstract
Increasing demand on higher data rates, makes multi carrier systems popular. Orthogonal frequency division multiplexing (OFDM), a form of multicarrier modulation, has been widely applied in wireless communication systems for major advantages. In order to obtain channel state information, and overcome multipath fading channel estimation must be performed in these systems. The channel estimation quality significantly depends on the pilot pattern. In this study, the relationship between the optimum pilot symbol interval that yields the minimum channel estimation mean squared error and coherence bandwidth, coherence time at 0,9 correlation is investigated in OFDM systems for different time and frequency selective channels. Different curve fitting methods are applied to data and performances are compared in terms of normalized root mean squared errors (NRMSE). Considering both simplicity and NRMSE; the optimum pilot symbol interval is calculated by cubic polynomial in frequency direction, and by quadratic polynomial in time direction.
Year
DOI
Venue
2014
10.1109/SIU.2014.6830315
Signal Processing and Communications Applications Conference
Keywords
Field
DocType
OFDM modulation,channel estimation,curve fitting,fading channels,mean square error methods,multipath channels,NRMSE,OFDM systems,channel estimation mean squared error,channel state information,curve fitting,frequency selective channels,multicarrier modulation,multicarrier systems,multipath fading channel estimation,normalized root mean squared errors,optimum pilot symbol interval,orthogonal frequency division multiplexing,quadratic polynomial,wireless communication systems,NRMSE,OFDM,channel estimation,curve fitting methods,the optimum pilot density
Multipath propagation,Curve fitting,Computer science,Coherence bandwidth,Mean squared error,Artificial intelligence,Channel state information,Pattern recognition,Algorithm,Communication channel,Statistics,Orthogonal frequency-division multiplexing,Coherence time
Conference
ISSN
Citations 
PageRank 
2165-0608
0
0.34
References 
Authors
4
3
Name
Order
Citations
PageRank
Begum Korunur Engiz142.61
Çetin Kurnaz263.70
Hatice Sezgin341.59