Title :
Effects of channel estimation error in MC-CDMA/TDD systems
Author :
Jeong, Dong Geun ; Kim, Myoung Jin
Author_Institution :
Dept. of Electron. Eng., Hankuk Univ. of Foreign Studies, Yongin-si, South Korea
Abstract :
The multicarrier CDMA systems with time division duplex mode (MC-CDMA/TDD systems) can exploit the reciprocity between the uplink and downlink channels. The signal may be pre-equalized at the base station transmitter, based on the channel estimation during the previous reception time slot. This may lead to a reduction in complexity of the portable unit. However, since the channel is time varying in mobile communications environments, the estimate of the channel introduces error and this causes performance degradation. We analyze the channel estimation error and the BER performance of the MC-CDMA/TDD system with pre-equalization when the channel is time varying due to the mobile´s motion
Keywords :
code division multiple access; equalisers; error statistics; land mobile radio; multiuser channels; parameter estimation; radio links; radio transmitters; time-varying channels; BER performance; MC-CDMA/TDD systems; base station transmitter; channel estimation error; complexity reduction; downlink channel; mobile motion; multicarrier CDMA systems; performance degradation; portable unit; pre-equalization; reception time slot; time division duplex mode; time varying channel; uplink channel; Base stations; Bit error rate; Channel estimation; Degradation; Downlink; Mobile communication; Multiaccess communication; Multicarrier code division multiple access; Performance analysis; Transmitters;
Conference_Titel :
Vehicular Technology Conference Proceedings, 2000. VTC 2000-Spring Tokyo. 2000 IEEE 51st
Conference_Location :
Tokyo
Print_ISBN :
0-7803-5718-3
DOI :
10.1109/VETECS.2000.851577
