Title :
Space-Time-Frequency Coded MIMO-OFDM System: Achieving Full-Diversity Invariant to Channel Variations
Author_Institution :
Dept. of Electr. & Comput. Eng., McGill Univ., Montreal, Que.
Abstract :
Most of the existing MIMO and MIMO-OFDM code designs are able to achieve full diversity over a special channel scenario (quasi-static/fast fading in time or frequency), but need to be re-designed over any other. In this paper, full rate and full diversity space-time-frequency (STF) codes with linear decoding complexity are proposed. Besides, the proposed codes can also exploit the maximum achievable diversity when wireless channels become frequency and/or time non-selective fading because of the changing of the surrounding scatterers distribution and/or the stationarity of the mobile, without altering the code structures. Simulation results for two transmit antennas over the COST-207 6-ray Typical Urban (TU) channel model are presented to support the code designs
Keywords :
MIMO communication; OFDM modulation; decoding; diversity reception; fading channels; mobile radio; modulation coding; space-time codes; transmitting antennas; COST-207 6-ray Typical Urban channel model; full diversity; linear decoding complexity; multiple input multiple output system; orthogonal frequency division multiplexing; space-time-frequency coded MIMO-OFDM system; time nonselective fading; transmit antennas; wireless channels; Chaotic communication; Demodulation; Fading; Frequency diversity; Land mobile radio; Maximum likelihood decoding; Mobile communication; OFDM; Receiving antennas; Transmitting antennas;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2006 IEEE 17th International Symposium on
Conference_Location :
Helsinki
Print_ISBN :
1-4244-0329-4
Electronic_ISBN :
1-4244-0330-8
DOI :
10.1109/PIMRC.2006.253937
