Showing papers on "Channel allocation schemes published in 1984"

Intermodulation Interference-Minimum Frequency Assignment for Satellite SCPC Systems

Abstract: This paper addresses frequency assignment for singlelevel and multilevel SCPC systems. In order to obtain the optimum channel allocation, where the influence of intermodulation noise on carriers is minimized, a practical and effective method is proposed. The quasi-optimum, solutions obtained with the proposed method are presented for single-level SCPC systems, showing their advantage in intermodulation noise reduction. Concerning frequency assignment for multilevel SCPC systems, two strategies to realize the-quasi-optimum channel allocation are compared with regard to the improvement in carrier-to-intermodulation noise power ratio. The performance of the obtained channel allocation indicates the effectiveness of the proposed optimization method.

Traffic characterization and classification of users of land mobile communications channels

Abstract: An analysis of traffic parameters for different types of users of land mobile radio (LMR) communications channels is presented. Based on audio monitoring of voice traffic, this analysis provides valuable information concerning efficiency of channel utilization by users; such information corroborates results already obtained through RF carrier monitoring. In addition, a user classification strategy, based on their message characteristics, is proposed and different procedures are suggested for estimating user message length when only base station information is available. Finally, the effects of grouping two users on the same channel are discussed from both channel allocation and grade of service points of view.

Traffic Characterization And Classification Of Users Of Land Mobile Communications Channels.

Abstract: An analysis of traffic parameters for different types of users of land mobile radio (LMR) communications channels is presented. Based on audio monitoring of voice traffic, this analysis provides valuable information concerning efficiency of channel utilization by users; such information corroborates results already obtained through RF carrier monitoring. In addition, a user classification strategy, based on their message characteristics, is proposed and different procedures are suggested for estimating user message length when only base station information is available. Finally, the effects of grouping two users on the same channel are discussed from both channel allocation and grade of service points of view.