Title :
A modulation scheme for broadband wireless access in high capacity networks
Author :
Fong, B. ; Hong, G.Y. ; Fong, A.C.M.
Author_Institution :
Dept. of Electrotechnol., Auckland Univ. of Technol., New Zealand
fDate :
8/1/2002 12:00:00 AM
Abstract :
Wireless wideband communication systems provide high data transmission rates suitable for fast mobile Internet access. Factors such as bandwidth efficiencies and cell-to-cell interference are primarily determined by the modulation technique used for data transfer between the network base station and the subscribers´ mobile devices. In general, higher order modulation schemes such as 64-QAM offers a higher bandwidth efficiency at the expense of more complex receiver structure requirements and higher cell-to-cell interference that impacts frequency reuse while simple techniques such as QPSK offers better BER but lower data rate. This paper presents a modulation scheme for multicast distribution across an area of up to several kilometers providing services for portable network access devices such as PDAs and notebook computers. The system improves coverage under different weather conditions. Our study shows that 16-QAM offers the best compromise for high speed multimedia services.
Keywords :
Internet; broadband networks; cellular radio; data communication; error statistics; mobile computing; multicast communication; notebook computers; quadrature amplitude modulation; quadrature phase shift keying; radio access networks; radiofrequency interference; 16-QAM; 64-QAM; BER; PDA; QPSK; bandwidth efficiency; broadband wireless access; cell-to-cell interference; data transfer; fast mobile Internet access; frequency reuse; high capacity networks; high data transmission rates; high speed multimedia services; higher order modulation; mobile computing equipment; mobile devices; multicast distribution; network access devices; network base station; notebook computers; portable network access devices; weather conditions; wireless wideband communication systems; Bandwidth; Base stations; Data communication; Frequency; Interference; Internet; Personal digital assistants; Quadrature phase shift keying; Wideband; Wireless communication;
Journal_Title :
Consumer Electronics, IEEE Transactions on
DOI :
10.1109/TCE.2002.1037028