Title :
A partial-DFT-based OFDM system resistant to channel nulls
Author :
Liang, Jie ; Tran, Trac D.
Author_Institution :
Dept. of Electron. & Comput. Eng., Johns Hopkins Univ., Baltimore, MD, USA
Abstract :
In this paper, we present a partial DFT-based modified OFDM system that is resistant to channel nulls when both the transmitter and the receiver know the channel state information. We show the relationship between the method and filter bank precoding system as well as linearly precoded OFDM. Two optimal zero-forcing solutions are developed. The solutions inherit the fast implementation of OFDM and the superior performance of linear precoding system.
Keywords :
AWGN channels; OFDM modulation; channel bank filters; discrete Fourier transforms; discrete time filters; least mean squares methods; linear codes; channel nulls; channel state information; discrete Fourier transform; filter banks; linear precoding system; optimal zero-forcing solutions; orthogonal frequency division multiplexing; partial-DFT-based OFDM; receivers; transmitters; Casting; Channel state information; DSL; Delta modulation; Equations; Filter bank; Modems; Null value; OFDM; Transmitters;
Conference_Titel :
Signals, Systems and Computers, 2002. Conference Record of the Thirty-Sixth Asilomar Conference on
Conference_Location :
Pacific Grove, CA, USA
Print_ISBN :
0-7803-7576-9
DOI :
10.1109/ACSSC.2002.1197289
