Title :
On increasing OFDM method frequency efficiency opportunity
Author_Institution :
Holon Acad. Technol. Inst., Israel
fDate :
6/1/2004 12:00:00 AM
Abstract :
OFDM-SFN or OFDM-MFN methods are used in DVB-T and DAB systems. In the case of MFN there are problems with frequency efficiency. This article presents a new multiplexing technique, which combines OFDM and CDMA features. It solves some problems of these methods. This new method solves some of the problems of OFDM-MFN and other wireless OFDMA systems, namely increasing frequency efficiency.
Keywords :
OFDM modulation; Walsh functions; cellular radio; code division multiple access; digital audio broadcasting; digital video broadcasting; CDMA features; DAB systems; DVB-T systems; MFN frequency efficiency; OFDM features; OFDM method frequency efficiency; OFDM-MFN methods; OFDM-SFN methods; Walsh functions; cellular system; multi frequency network; multiplexing technique; single frequency network; wireless OFDMA systems; Digital video broadcasting; Diversity methods; Doppler shift; Frequency division multiaccess; Helium; Multiaccess communication; OFDM; Reflection; Signal to noise ratio; Time division multiple access; CDMA; FBS; OFDM; OFDMA; cellular system; frequency efficiency; walsh functions;
Journal_Title :
Broadcasting, IEEE Transactions on
DOI :
10.1109/TBC.2004.828752
