Title :
The effect of channel variations upon capacity
Author :
Medard, Muriel ; Gallager, Robert G.
Author_Institution :
MIT, Cambridge, MA, USA
fDate :
28 Apr-1 May 1996
Abstract :
The capacity of wireless systems depends critically on the variations of the channels. The effect of the channel variations is twofold: it creates fading and it precludes exact measurement of the channel. We study the second effect. We establish bounds for the loss in mutual information due to not knowing the channel at the receiver for the single and multiple user case. We relate the Doppler spread and the time spread to the loss in capacity due to the inability to measure exactly a changing channel
Keywords :
Doppler effect; channel capacity; radiocommunication; time-varying channels; Doppler spread; channel capacity; channel measurement; channel variations; fading; multiple user; mutual information loss; receiver channel; single user; time varying channel; wireless systems; Channel capacity; Fading; Frequency; Loss measurement; Multipath channels; Mutual information; Region 2; Sampling methods; Time measurement; Time-varying channels;
Conference_Titel :
Vehicular Technology Conference, 1996. Mobile Technology for the Human Race., IEEE 46th
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-3157-5
DOI :
10.1109/VETEC.1996.504064
