Optimal training signals for MIMO OFDM channel estimation
- 22 February 2005
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- Vol. 1, 219-224
- https://doi.org/10.1109/glocom.2004.1377943
Abstract
This work presents general classes of optimal training signals for estimation of frequency-selective channels in MIMO OFDM systems. Basic properties of the discrete Fourier transform are used to derive the optimal training signals which minimize the channel estimation mean square error. Both single and multiple OFDM training symbols are considered. Several optimal pilot tone allocations among the transmit antennas are presented and classified as frequency division multiplexing, time division multiplexing, code division multiplexing in frequency-domain, code division multiplexing in time-domain, and combinations thereof. All existing optimal training signals in the literature are special cases of the presented optimal training signals and our designs can be applied to pilot-only schemes as well as pilot-data multiplexed schemes.Keywords
This publication has 12 references indexed in Scilit:
- Optimal training design for MIMO OFDM systems in mobile wireless channelsIEEE Transactions on Signal Processing, 2003
- Training-based channel estimation for multiple-antenna broadband transmissionsIEEE Transactions on Wireless Communications, 2003
- A new unified construction of perfect root-of-unity sequencesPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Optimal design and placement of pilot symbols for channel estimationIEEE Transactions on Signal Processing, 2002
- Optimal training and redundant precoding for block transmissions with application to wireless OFDMIEEE Transactions on Communications, 2002
- Optimal placement of training for frequency-selective block-fading channelsIEEE Transactions on Information Theory, 2002
- Simplified channel estimation for OFDM systems with multiple transmit antennasIEEE Transactions on Wireless Communications, 2002
- Optimal training sequences and pilot tones for OFDM systemsIEEE Communications Letters, 2001
- Optimal sequences for channel estimation using discrete Fourier transform techniquesIEEE Transactions on Communications, 1999
- Complex optimal sequences with constant magnitude for fast channel estimation initializationIEEE Transactions on Communications, 1998