Title :
On the Optimality of Frequency-Domain Equalization in DFT-Spread MIMO-OFDM Systems
Author :
Jaeckel, Stephan ; Jungnickel, Volker
Author_Institution :
Heinrich-Hertz-Inst., Berlin
fDate :
March 31 2008-April 3 2008
Abstract :
In this paper, we compare linear receivers for DFT-spread MIMO-OFDM Systems. It is proven mathematically and illustrated by numerical simulations that the advanced DFT RAKE receiver with linear multiuser detection is equivalent to the popular frequency-domain equalization (FDE) with IDFT despreading. This result holds also for multi-antenna systems. As a consequence, broadband wireless transmission chains with high diversity can be implemented with low complexity at the receiving end. The benefit of using the minimum mean-square error (MMSE) criterion in the FDE is also illustrated.
Keywords :
MIMO communication; OFDM modulation; communication complexity; discrete Fourier transforms; equalisers; frequency-domain analysis; least mean squares methods; multiuser detection; radio receivers; DFT RAKE receiver; DFT-spread MIMO-OFDM system; broadband wireless transmission chain; communication complexity; frequency-domain equalization; linear multiuser detection; minimum mean-square error criterion; multiantenna system; Communications Society; Crosstalk; Discrete Fourier transforms; Fading; Maximum likelihood estimation; Multicarrier code division multiple access; Multipath channels; Multiuser detection; OFDM; RAKE receivers;
Conference_Titel :
Wireless Communications and Networking Conference, 2008. WCNC 2008. IEEE
Conference_Location :
Las Vegas, NV
Print_ISBN :
978-1-4244-1997-5
DOI :
10.1109/WCNC.2008.211
