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2884 IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 7, NO. 8, AUGUST 2008 PAR-Constrained Training Signal Designs for MIMO OFDM Channel
 

Summary: 2884 IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 7, NO. 8, AUGUST 2008
PAR-Constrained Training Signal Designs for MIMO OFDM Channel
Estimation in the Presence of Frequency Offsets
Hlaing Minn, Senior Member, IEEE, Yinghui Li, Student Member, IEEE, and Naofal Al-Dhahir, Fellow, IEEE
Abstract--Training signals for OFDM channel estimation
should possess low PAR to avoid nonlinear distortions at the
transmit amplifier and at the same time they should be robust
against frequency offsets. In this letter, we show that the above
two requirements of the training signals are conflicting. We
propose two new training signal designs for MIMO OFDM
frequency-selective channel estimation. Our proposed training
signals achieve more robust channel estimation performance
against frequency offsets while satisfying the PAR constraints
compared to training signals designed to achieve a fixed low
PAR but without any consideration for robustness to frequency
offsets.
Index Terms--Channel estimation, frequency offsets, MIMO,
OFDM, PAR, pilot design, training signal design.
I. INTRODUCTION
TRAINING signal design for OFDM channel estimation

  

Source: Al-Dhahir, Naofal - Department of Electrical Engineering, University of Texas at Dallas

 

Collections: Engineering