Digital signal processing (3rd ed.): principles, algorithms, and applications
Digital signal processing (3rd ed.): principles, algorithms, and applications
Multi-carrier spread-spectrum
CDMA for Wireless Personal Communications
CDMA for Wireless Personal Communications
Microwave Mobile Communications
Microwave Mobile Communications
On Schemes for Multriate Support in DS-CDMA Systems
Wireless Personal Communications: An International Journal
Decorrelating Detectors for a Dual Rate Synchronous DS/CDMA System
Wireless Personal Communications: An International Journal
Probability and Random Processes For EE's (3rd Edition)
Probability and Random Processes For EE's (3rd Edition)
IEEE Communications Magazine
An overview of air interface multiple access for IMT-2000/UMTS
IEEE Communications Magazine
UMTS, the mobile multimedia vision for IMT 2000: a focus on standardization
IEEE Communications Magazine
Partial sampling MMSE interference suppression in asynchronous multicarrier CDMA system
IEEE Journal on Selected Areas in Communications
EURASIP Journal on Applied Signal Processing
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In order to accommodate different types of traffic in future wirelesscommunications, it is necessary to consider a system, which can operatesatisfactorily at multiple transmission rates. Due to its capability to copewith the hostile frequency selective fading, that limits transmission rate,and its suitability to handle multi-rate data, multi-carrier CDMA (MC-CDMA)has recently drawn considerable attention as a suitable candidate forsupporting multimedia services in wireless communications. Multi-rate accessschemes where users are able to transmit at different data rates on MC-CDMAsystems are presented in this paper. Four multi-rate access schemes: uncodedfixed spreading length (UFSL), coded fixed spreading length (CFSL), multi-codefixed spreading length (MFSL) and variable spreading length (VSL) schemes areproposed. With these schemes, different traffic such as voice, video and highrate data can be transmitted seamlessly through one MC-CDMA infrastructure.A chip-level minimum mean square error combining (MMSEC) technique is employedfor joint energy combining and interference cancellation purpose. Theperformance of these schemes with MMSEC is compared by both theoreticalderivations and simulation results under frequency selective Rayleigh fadingchannels.