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

fYear

2008

Firstpage

4516

Lastpage

4520

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/ICC.2008.847

Filename

4533883