Hybrid DS/SFH-TDD Cellular System with Adaptive Hopping Pattern Control

Kazunori AKABANE  Masao NAKAGAWA  

IEICE TRANSACTIONS on Communications   Vol.E79-B   No.9   pp.1256-1261
Publication Date: 1996/09/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Personal Communications)
Category: Modulation, Equalization and interference cancellation technologies
hybrid DS/SFH system,  TDD system,  power control,  adaptive hopping pattern control,  cellular system,  

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Hybrid direct sequence/slow frequency hopping-time division duplex (DS/SFH-TDD) multiple access system has some good features of each system. However it has a problem of hit between multiple users. If the designed frequency hopping patterns are inadequate, the quality of the multiple access system is degraded due to the frequent hit. In this paper, we propose an adaptive hopping pattern control system which is able to avoid the multiple access interference of hit. The proposed system decreases the influence of hit and increases the user capacity in the cell. And this adaptive hopping pattern control is applied to both single-cell and multi-cell systems. By computer simulation to evaluate the performance of this system, we found that this system is effective in increasing the multiple access capability.