Title :
Performance analysis of rate adaptation in WCDMA communication systems
Author :
Zhao, Lian ; Mark, Jon W.
Author_Institution :
Dept. of Electr. & Comput. Eng., Ryerson Univ., Toronto, Ont., Canada
Abstract :
The variability of the wireless channel requires adaptive techniques for efficient, radio resource service The throughput gains for ideal rate adaptation over nonadaptation in a wideband CDMA communication system is analyzed. The result is obtained by using the derived probability density functions of service ratio. We further investigate how performance degrades with adaptation restrictions, which include adaptation interval, Doppler effect, delays associated with channel state information feedback, and finite number of spreading factors. Our results show that rate adaptation with restrictions does not always bring gains over nonadaptation.
Keywords :
Doppler effect; broadband networks; code division multiple access; radiocommunication; telecommunication channels; Doppler effect; adaptation restriction; adaptive technique; channel state information feedback; probability density function; radio resource service; rate adaptation WCDMA communication system; spreading factor; wideband CDMA; wireless channel; Channel state information; Degradation; Delay effects; Doppler effect; Multiaccess communication; Performance analysis; Probability density function; State feedback; Throughput; Wideband;
Conference_Titel :
Wireless Communications and Networking Conference, 2004. WCNC. 2004 IEEE
Print_ISBN :
0-7803-8344-3
DOI :
10.1109/WCNC.2004.1311647
