DocumentCode :
763895
Title :
An Orthogonally Multiplexed QAM System Using the Discrete Fourier Transform
Author :
Hirosaki, Botaro
Author_Institution :
Nippon Electric Company, Japan
Volume :
29
Issue :
7
fYear :
1981
fDate :
7/1/1981 12:00:00 AM
Firstpage :
982
Lastpage :
989
Abstract :
An orthogonally multiplexed QAM (O-QAM) system is a multichannel system with a baud rate spacing between adjacent carrier frequencies; this property is desirable to digitally implement the system using the discrete Fourier transformation (DFT). This paper provides a novel digital signal processing method based on an 
/2-point DFT processing in the O-QAM system. A complexity comparison between a digital O-QAM system and a digital singlechannel QAM system shows that the digital O-QAM system using the new method is more economical than the digitally implemented conventional single-channel data transmission system.
/2-point DFT processing in the O-QAM system. A complexity comparison between a digital O-QAM system and a digital singlechannel QAM system shows that the digital O-QAM system using the new method is more economical than the digitally implemented conventional single-channel data transmission system.Keywords :
APK communication; DFT; Discrete Fourier transforms (DFT´s); Frequency-division multiplexing (FDM); Baseband; Data communication; Demodulation; Digital signal processing; Discrete Fourier transforms; Filters; Frequency division multiplexing; Modems; Quadrature amplitude modulation; Signal processing;
fLanguage :
English
Journal_Title :
Communications, IEEE Transactions on
Publisher :
ieee
ISSN :
0090-6778
Type :
jour
DOI :
10.1109/TCOM.1981.1095093
Filename :
1095093
Link To Document :
