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MIMO-OFDM System with Insufficient Cyclic Prefix  

Lim Jong-Bu (Pohang University of Science and Technology)
Choi Chan-Ho (Pohang University of Science and Technology)
Im Gi-Hong (Pohang University of Science and Technology)
Kim Ki-Ho (Samsung Advanced Institute of Technology)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.43, no.3, 2006 , pp. 10-17 More about this Journal
Abstract
For orthogonal frequency division multiplexing (OFDM), cyclic prefix (CP) should be longer than the length of channel impulse response, resulting in a loss of bandwidth efficiency. In this letter, the CP reconstruction (CPR) technique is first applied to a multi-input multi-output (MIMO)-OFDM system with insufficient CP. The intercarrier interference (ICI) from multiple transmit antennas is so large for MIMO system that it can not be sufficiently suppressed with the conventional CPR procedure used in single-input single-output (SISO) system. A new minimum mean-square error (MMSE) equalization and ordering process is proposed for MIMO system to suppress the ICI during the CPR procedure. By applying the proposed CPR algerian to MIMO-OFDM system, we can obtain both the benefits of multiplexing gai and spectral efficiency gain.
Keywords
ICI (intercarrier interference);
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