Title :
Impacts of amplifier nonlinearities on uplink performance in 3G LTE systems
Author :
Zheng, Kan ; Wei, Meiying ; Long, Hang ; Liu, Yang ; Wang, Wenbo
Author_Institution :
Wireless Signal Process. & Network Lab. Key Lab. of Universal Wireless Commun., Minist. of Educ., Beijing Univ. of Posts & Telecommun., Beijing, China
Abstract :
As good candidates for uplink multiple access scheme in broadband wireless communication systems, orthogonal frequency division multiplexing (OFDM) and single-carrier (SC) with frequency division multiple access (FDMA) have gained enough attention recently. However, the non-linearity of amplifier deteriorates the performances of these two schemes. On the assumption of non-linear amplifier applied, we compare the block error rate (BLER) and throughput performances between SC-FDMA and OFDM schemes in the framework of third generation (3G) long-term evolution (LTE) systems, where the adaptive modulation and coding (AMC) technique with slow power control is used. Our simulation results show that the impacts of non-linearity on two schemes are different and dependent on several factors including the power gain of the amplifier.
Keywords :
OFDM modulation; amplifiers; broadband networks; radio links; 3G LTE system; adaptive coding; adaptive modulation; amplifier nonlinearity; amplifier power gain; block error rate; broadband wireless communication system; frequency division multiple access; long-term evolution system; nonlinear amplifier; orthogonal frequency division multiplexing; power control; single-carrier; uplink multiple access scheme; Broadband amplifiers; Broadband communication; Error analysis; Frequency conversion; Frequency division multiaccess; OFDM; Power amplifiers; Power generation; Throughput; Wireless communication; AMC; HPA; OFDM; SC-FDMA;
Conference_Titel :
Communications and Networking in China, 2009. ChinaCOM 2009. Fourth International Conference on
Conference_Location :
Xian
Print_ISBN :
978-1-4244-4337-6
Electronic_ISBN :
978-1-4244-4337-6
DOI :
10.1109/CHINACOM.2009.5339757
