Nonlinear Predistortion for OFDM SDMA Systems

Author

Habendorf, Rene ; Fettweis, Gerhard

Author_Institution

Vodafone Chair Mobile Commun. Syst., Technische Univ. Dresden

fYear

2006

fDate

2-5 July 2006

Firstpage

1

Lastpage

5

Abstract

This paper investigates nonlinear predistortion techniques for the downlink of OFDM systems from a transmitter equipped with multiple antennas to non-cooperative single antenna mobile stations. Although the performance of nonlinear predistortion schemes like Tomlinson Harashima precoding (THP) strongly depends on the ordering of the precoded symbols, current THP approaches apply data independent sorting algorithms. A tree search algorithm is proposed which combines matrix decomposition and the feedback structure of the precoder to compute a data dependent precoding order

Keywords

OFDM modulation; antenna arrays; matrix decomposition; mobile antennas; mobile radio; precoding; search problems; space division multiple access; trees (mathematics); OFDM SDMA systems; Tomlinson Harashima precoding; data independent sorting algorithms; feedback structure; matrix decomposition; multiple antennas; noncooperative single antenna mobile stations; nonlinear predistortion; tree search algorithm; Downlink; Feedback; Matrix decomposition; Mobile antennas; Multiaccess communication; OFDM; Predistortion; Sorting; Transmitters; Transmitting antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing Advances in Wireless Communications, 2006. SPAWC '06. IEEE 7th Workshop on

Conference_Location

Cannes

Print_ISBN

0-7803-9710-X

Electronic_ISBN

0-7803-9711-8

Type

conf

DOI

10.1109/SPAWC.2006.346386

Filename

4153874