Title :
Performance of STF Coded OFDM with Transmit Eigenbeamforming in Correlated Fading Channels
Author :
Lin, Kevin H. ; Hussain, Zahir M.
Author_Institution :
Sch. of Electr. & Commun. Eng., RMIT Univ., Melbourne, Vic.
fDate :
Aug. 31 2006-Sept. 1 2006
Abstract :
A new transmit diversity configuration that combines transmit eigenbeamforming with space-time-frequency (STF) coding for orthogonal frequency division multiplex (OFDM) systems is investigated. Based on the signal angle-of-arrival (AoA) estimates, channel correlation matrix is constructed. It is shown that signal transmission of STF codes in the eigen-modes of this matrix gives an effective array weighting gain which improves system error performance without sacrificing any diversity and coding gain. For imperfect AoA estimation, error probability loss due to incorrect estimation is quantified and the required accuracy of AoA estimation for securing the performance gain is shown for different angular spreads
Keywords :
OFDM modulation; array signal processing; correlation methods; direction-of-arrival estimation; diversity reception; eigenvalues and eigenfunctions; error statistics; fading channels; matrix algebra; space-time codes; STF coded OFDM; angle-of-arrival estimation; channel correlation matrix; diversity transmission; eigenbeamforming; error probability loss; fading channel; orthogonal frequency division multiplex system; signal AoA; space-time-frequency; Australia; Diversity reception; Estimation error; Fading; Frequency division multiplexing; Frequency estimation; OFDM; Performance gain; Receiving antennas; Transmitters;
Conference_Titel :
Communications, 2006. APCC '06. Asia-Pacific Conference on
Conference_Location :
Busan
Print_ISBN :
1-4244-0573-4
Electronic_ISBN :
1-4244-0574-2
DOI :
10.1109/APCC.2006.255778
