Title :
Two-Dimension Adaptive Spectral Efficiency for SC-FDMA Systems
Author :
Wu, Ye ; Lei, Ming ; Du, Jun
Author_Institution :
Dept. of Wireless Commun., NEC Corp., China
Abstract :
We propose a two-dimension adaptive spectral efficiency scheme for a new-designed single-carrier frequency division multiple access (SC-FDMA) system by flexible reference signal (RS) and data multiplexing for each user. Based on Doppler spread, each user first determines the number of SC-FDMA symbols that bear RS in a time slot, and each of such SC-FDMA symbols, based on bandwidth allocation, then serves to estimate a shortened time-domain channel impulse response (CIR) as well as bear data. The proposed design significantly outperforms the channel estimation (CE) case of Third Generation Partnership Project (3GPP) Long Term Evolution (LTE) uplink in terms of spectral efficiency at a high Doppler spread.
Keywords :
frequency division multiple access; multiplexing; Doppler spread; SC-FDMA systems; Third Generation Partnership Project; bandwidth allocation; bear data; channel estimation; data multiplexing; long term evolution uplink; reference signal; single-carrier frequency division multiple access system; time-domain channel impulse response; two-dimension adaptive spectral efficiency scheme; Channel estimation; Discrete Fourier transforms; Doppler effect; Frequency division multiaccess; Frequency domain analysis; Multiplexing; Receivers;
Conference_Titel :
Vehicular Technology Conference Fall (VTC 2010-Fall), 2010 IEEE 72nd
Conference_Location :
Ottawa, ON
Print_ISBN :
978-1-4244-3573-9
Electronic_ISBN :
1090-3038
DOI :
10.1109/VETECF.2010.5594595
