Title :
A New Multirate Multiple-Access Technique Based on the Combination of Space-Time Coding and Wavelet Modulation
Author :
El-Khamy, Said E. ; Ghaleb, I.A. ; Nashaat, Mohamed A.
Author_Institution :
Dept. of Electr. Eng., Alexandria Univ.
Abstract :
A new multirate multiple-access technique based on the combination of space-time coding and wavelet modulation is presented in this paper. The proposed technique makes use of the good properties of space-time coding (STC) technique with multiple transmitting and receiving antennas which has enhanced performance in fading channels. However, STC was originally proposed for single user systems. To generalize it to multi-user systems, we propose to combine STC with wavelet modulation to provide both orthogonality among different users as well as multi-rate transmission capability in a way similar to wavelet-packet division multiplexing (WPDM) systems. This technique provides a high multiple-access interference rejection performance. Simulation show its good performance in Rayleigh fading channels
Keywords :
Rayleigh channels; antenna arrays; interference suppression; modulation coding; multi-access systems; multiplexing; space-time codes; wavelet transforms; Rayleigh fading channel; STC technique; WPDM system; interference rejection performance; multiple receiving antennas; multiple transmitting antennas; multirate multiple-access technique; multiuser system; space-time coding; wavelet modulation; wavelet-packet division multiplexing; Base stations; Discrete wavelet transforms; Fading; Frequency diversity; Intserv networks; Modulation coding; Receiving antennas; Signal processing; Transmitting antennas; Wavelet packets;
Conference_Titel :
Radio Science Conference, 2006. NRSC 2006. Proceedings of the Twenty Third National
Conference_Location :
Menoufiya
Print_ISBN :
977-5031-84-2
Electronic_ISBN :
977-5031-84-2
DOI :
10.1109/NRSC.2006.386341
