1 Joint Channel Estimation and Prediction for OFDM Systems Ian C. Wong and Brian L. Evans {iwong,bevans}@ece.utexas.edu Embedded Signal Processing Laboratory Wireless Networking and Communications Group The University of Texas at Austin IEEE Global Telecommunications Conference Nov. 30, 2005
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Joint Channel Estimation and Prediction for OFDM Systems
Joint Channel Estimation and Prediction for OFDM Systems. Ian C. Wong and Brian L. Evans {iwong,bevans}@ece.utexas.edu Embedded Signal Processing Laboratory Wireless Networking and Communications Group The University of Texas at Austin IEEE Global Telecommunications Conference Nov. 30, 2005. - PowerPoint PPT Presentation
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Joint Channel Estimation and Prediction for OFDM Systems
Ian C. Wong and Brian L. Evans{iwong,bevans}@ece.utexas.edu
Embedded Signal Processing LaboratoryWireless Networking and Communications Group
The University of Texas at AustinIEEE Global Telecommunications Conference
Nov. 30, 2005
2
Adaptive Orthogonal Frequency Division Multiplexing (OFDM)
Adjust transmission based on channel information Maximize data rates and/or improve link quality
Problems Feedback delay - significant performance loss Volume of feedback - power and bandwidth overhead
InternetBack haul
Base Station
Time-varying Wideband Channel
Mobile
Feedback channel information
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Prediction of Wireless Channels Use current and previous channel estimates to