Title :
A pre-equalization technique for uplink MC-CDMA systems using TDD and FDD modes
Author :
Nobilet, Stéphane ; Hélard, Jean-François
Author_Institution :
IETR/INSA, Rennes, France
Abstract :
This paper presents a method to avoid pilot subcarrier insertion for uplink MC-CDMA system channel estimation in order to increase both spectral efficiency and power efficiency. Based on the reciprocity property of the channel, the proposed technique consists in using the downlink channel estimation to pre-distort the signal at the mobile station before transmission in order to offset the degradations introduced by the uplink channel. Simulation results are given for time division duplex (TDD) mode and a first analysis is presented for frequency division duplex (FDD) mode.
Keywords :
3G mobile communication; OFDM modulation; cellular radio; channel estimation; code division multiple access; quality of service; time division multiplexing; FDD; OFDM modulation; QoS; TDD; channel estimation; data services; frequency division duplex mode; next generation cellular systems; orthogonal frequency division multiplex modulation; power efficiency; pre-equalization technique; quality of service; reciprocity property; spectral efficiency; time division duplex mode; uplink MC-CDMA; Channel estimation; Downlink; Fading; Frequency conversion; Frequency estimation; Frequency response; Modulation coding; Multiaccess communication; Multicarrier code division multiple access; OFDM;
Conference_Titel :
Vehicular Technology Conference, 2002. Proceedings. VTC 2002-Fall. 2002 IEEE 56th
Print_ISBN :
0-7803-7467-3
DOI :
10.1109/VETECF.2002.1040362
