Title :
Hardware Architecture of Improved Tomlinson-Harashima Precoding for Downlink MC-CDMA
Author :
Lin, Kuang-Hao ; Lin, Hsin-Lei ; Chang, Robert C. ; Wu, Ching-Fen
Author_Institution :
Dept. of Electr. Eng., Nat. Chung Hsing Univ., Taichung
Abstract :
In this paper, Tomlinson-Harashima precoding (THP) algorithm for the downlink of MC-CDMA system, in which multiple-access interference and possible complexity in the mobile terminal are major burdens, is investigated. A new THP based on the minimum mean-square error (MMSE) criterion is derived. It has the better performance than the zero forcing (ZF) THP. The authors proposed the hardware architecture of MMSE THP at the transmitter and analyzed the required word length. The pipeline and parallel processes are employed to efficiently save time of executing procedure
Keywords :
OFDM modulation; channel coding; code division multiple access; least mean squares methods; MC-CDMA; Tomlinson-Harashima precoding; minimum mean-square error; multiple-access interference; orthogonal frequency division multiplexing; zero forcing; Downlink; Feedback; Hardware; Multiaccess communication; Multicarrier code division multiple access; Multiple access interference; Multiuser detection; Nonlinear filters; OFDM; Transmitters; MC-CDMA; MMSE; OFDM; THP; ZF; precoding;
Conference_Titel :
Circuits and Systems, 2006. APCCAS 2006. IEEE Asia Pacific Conference on
Conference_Location :
Singapore
Print_ISBN :
1-4244-0387-1
DOI :
10.1109/APCCAS.2006.342357
