Title :
Pre-filtering techniques for MC-CDMA downlink transmissions
Author :
Sanguinetti, Luca ; Morelli, Michele ; Cosovic, Ivan
Author_Institution :
Dept. of Inf. Eng., Pisa Univ.
Abstract :
We consider the downlink of a multi-carrier code-division multiple-access (MC-CDMA) system operating in a time division duplexing (TDD) mode and propose a non-linear pre-filtering scheme based on Tomlinson-Harashima pre-coding. In designing the pre-filtering matrices we adopt a minimum mean square error (MMSE) approach under a constraint on the overall transmit power since multiple access interference and multipath distortions are pre-compensated at the base station, low-complex receivers can be employed at the mobile units. Compared to other existing solutions, the proposed scheme provides better error rate performance
Keywords :
code division multiple access; distortion; error statistics; filtering theory; least mean squares methods; mobile radio; nonlinear filters; radiofrequency interference; time division multiplexing; MC-CDMA; MMSE approach; TDD; Tomlinson-Harashima precoding; downlink transmissions; minimum mean square error approach; multicarrier code-division multiple-access system; multipath distortions; multiple access interference; nonlinear prefiltering scheme; time division duplexing; Downlink; Error analysis; MIMO; Mean square error methods; Multicarrier code division multiple access; Multiple access interference; Multiuser detection; Nonlinear distortion; Signal to noise ratio; Transmitters;
Conference_Titel :
Global Telecommunications Conference, 2005. GLOBECOM '05. IEEE
Conference_Location :
St. Louis, MO
Print_ISBN :
0-7803-9414-3
DOI :
10.1109/GLOCOM.2005.1578366
