Title :
What is the price paid for superimposed training in OFDM?
Author :
Chen, Ning ; Zhou, G. Tong
Author_Institution :
Georgia Inst. of Technol., Atlanta, GA, USA
Abstract :
Orthogonal frequency division multiplexing (OFDM) transmission with superimposed training is considered in this paper. The superimposed training scheme is promoted for its high bandwidth efficiency, low computational complexity, and possibly improved power amplifier (PA) efficiency. Channel equalization is also straightforward thanks to the OFDM structure. By analyzing the peak-to-average power ratio (PAR) of the superimposed OFDM signal and utilizing a peak power constraint, we demonstrate that it is possible to lose a little in the information signal power, but gain a lot in the power that is devoted to channel sounding.
Keywords :
OFDM modulation; bandwidth allocation; channel estimation; data communication; digital radio; equalisers; mobile radio; power control; OFDM transmission; PAR; bandwidth efficiency; channel equalization; channel sounding; computational complexity; improved power amplifier efficiency; orthogonal frequency division multiplexing; peak power constraint; peak-to-average power ratio; superimposed training; Bandwidth; Channel estimation; Computational complexity; Convolution; Fading; Filters; OFDM; Peak to average power ratio; Power engineering and energy; Power engineering computing;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2004. Proceedings. (ICASSP '04). IEEE International Conference on
Print_ISBN :
0-7803-8484-9
DOI :
10.1109/ICASSP.2004.1326853
