Title :
Throughput-delay analysis of a multi-channel packet CDMA scheme in a fading environment
Author :
Xu, Weiping ; Chockalingam, A. ; Milstein, Laurence B.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., San Diego, La Jolla, CA, USA
Abstract :
In this paper, we analyze the throughput and delay performance of a multichannel wireless access protocol using CDMA in the presence of Rayleigh fading. M equal-capacity traffic channels, each of which is assigned a unique orthogonal spreading code, are shared by N mobile users (N⩾M) on the uplink (mobile-to-base station link). Transmission attempts on the uplink are made based on the busy/idle status of the M receivers, which is broadcast by the base station, every slot, on the downlink (base station-to-mobile link). An i.i.d. fading channel model is used to describe the packet success/failure process. Analytical expressions for the average per channel throughput and delay are derived. Simulation results are shown to verify the analysis
Keywords :
Rayleigh channels; access protocols; channel coding; code division multiple access; delays; fading; land mobile radio; packet radio networks; spread spectrum communication; Rayleigh fading; base station; base station-to-mobile link; broadcast; busy status; delay performance; downlink; equal-capacity traffic channels; fading environment; i.i.d. fading channel; idle status; independent identically distributed channel; mobile-to-base station link; multi-channel packet CDMA scheme; multichannel wireless access protocol; orthogonal spreading code; packet failure; packet success; receivers; throughput-delay analysis; uplink; Access protocols; Base stations; Broadcasting; Delay; Downlink; Fading; Multiaccess communication; Performance analysis; Rayleigh channels; Throughput;
Conference_Titel :
Universal Personal Communications Record, 1997. Conference Record., 1997 IEEE 6th International Conference on
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-3777-8
DOI :
10.1109/ICUPC.1997.625534
