Title :
Uplink performance of MC-CDMA/TDD systems with pre-compensation
Author :
Zheng, Kan ; Huang, Lin ; Wang, Wenbo ; Zhang, Ping
Author_Institution :
Sch. of Telecommun. Eng., Beijing Univ. of Posts & Telecommun., China
Abstract :
The paper presents a novel power-limited pre-compensation method in MC-CDMA/TDD systems, which can avoid pilot insertion on the uplink and increase the spectral/power efficiency. To keep the transmission power constant, only the phase of the signal is predistorted before transmission at the mobile station´s transmitter while the amplitude estimation and compensation of the received signal are performed at the base station´s receiver on the uplink. The performance degradation due to the time varying channel is also included in our analysis. Simulation results show good performance with the proposed pre-compensation method and our conclusion is given finally.
Keywords :
code division multiple access; compensation; mobile radio; parameter estimation; radio receivers; radio transmitters; time division multiplexing; time-varying channels; MC-CDMA/TDD system uplink; amplitude estimation; base station receiver; mobile station transmitter; phase predistortion; pilot insertion; power efficiency; power-limited pre-compensation method; signal compensation; spectral efficiency; time varying channel; Amplitude estimation; Channel estimation; Degradation; Downlink; Multicarrier code division multiple access; OFDM modulation; Performance analysis; Power engineering and energy; Power system modeling; Transmitters;
Conference_Titel :
Vehicular Technology Conference, 2004. VTC 2004-Spring. 2004 IEEE 59th
Print_ISBN :
0-7803-8255-2
DOI :
10.1109/VETECS.2004.1390479
