Title :
EM-Based Receiver Design for Uplink MIMO-OFDMA Systems
Author :
Wang, Meng ; Goodwin, Graham C. ; Quevedo, Daniel E.
Author_Institution :
Sch. of Electr. Eng. & Comput. Sci., Univ. of Newcastle, Newcastle, NSW
Abstract :
In this paper we propose an iterative receiver for uplink MIMO-OFDMA systems based on the expectation maximization (EM) algorithm. Iterating between the E-step and the M-step, the EM-based receiver updates the channel estimates and, refines data detection by increasing the likelihood function. Practical implementation issues are also considered: space-time block-coding (STBC) is incorporated to improve system performance against fading; a reduced-complexity algorithm is proposed, which simplifies the computation whilst not compromising performance.
Keywords :
MIMO communication; channel estimation; computational complexity; expectation-maximisation algorithm; frequency division multiple access; radio links; radio receivers; space-time codes; EM-based receiver design; channel estimates; data detection; expectation maximization; likelihood function; reduced-complexity algorithm; space-time block-coding; uplink MIMO-OFDMA systems; Channel estimation; Communications Society; Fading; Iterative algorithms; MIMO; Maximum likelihood detection; Quality of service; Receivers; Transmitting antennas; Wireless networks;
Conference_Titel :
Communications, 2008. ICC '08. IEEE International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-2075-9
Electronic_ISBN :
978-1-4244-2075-9
DOI :
10.1109/ICC.2008.847
