Title :
Performance of predistortion techniques for uplink MC-CDMA systems with TDD and FDD modes
Author :
Nobilet, Stéphane ; Helard, Jean-François ; Jolivet, Nicolas ; Gillard, Raphaël
Author_Institution :
IETR/INSA, Rennes, France
Abstract :
This paper presents a method to avoid pilot subcarriers insertion for uplink MC-CDMA system channel estimation in order to increase both spectral efficiency and power efficiency. This method, based on the channel reciprocity property, consists in using the downlink channel estimation to predistort. the signal at the mobile station before transmission in order to counteract the uplink channel degradations. Simulation results in term of bit error rate for the two operating modes are given: time division duplex (TDD) and frequency division duplex (FDD). An analysis of a radio frequency (RF) duplexer for FDD mode is presented.
Keywords :
channel estimation; code division multiple access; error statistics; frequency division multiplexing; mobile radio; time division multiplexing; FDD modes; TDD modes; bit error rate; channel estimation; channel reciprocity property; downlink channel; frequency division duplex; mobile station; power efficiency; predistortion techniques; radio frequency duplexer; spectral efficiency; time division duplex; uplink MC-CDMA systems; uplink channel degradations; Channel estimation; Degradation; Downlink; Frequency conversion; Frequency estimation; Frequency response; Multiaccess communication; Multicarrier code division multiple access; Predistortion; Radio frequency;
Conference_Titel :
Wireless Personal Multimedia Communications, 2002. The 5th International Symposium on
Print_ISBN :
0-7803-7442-8
DOI :
10.1109/WPMC.2002.1088256
