Soft capacity analysis of TDMA systems with slow-frequency hopping and multiple-beam smart antennas

Smart antenna is considered as one of the most effective means for enhancing wireless system capacity. When fractional loading is accompanied with slow-frequency hopping (SFH), soft capacity can be realized in time-division multiple access (TDMA) wireless networks. Then, the interference reduction d...

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Bibliographic Details
Published in:IEEE transactions on vehicular technology 2002-07, Vol.51 (4), p.636-647
Main Authors: Ahmed, M.H., Mahmoud, S.A.
Format: Article
Language:English
Subjects:
Analytical models
Antennas
Applied sciences
Call admission control
Communication systems
Computational modeling
Computer simulation
Control algorithms
Exact sciences and technology
Gain
GSM
Interference
Mathematical analysis
Multiple access
Performance analysis
Power control
Signal quality
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Time division multiple access
Transmission and modulation (techniques and equipments)
Transmitting antennas
Wireless networks
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Summary:Smart antenna is considered as one of the most effective means for enhancing wireless system capacity. When fractional loading is accompanied with slow-frequency hopping (SFH), soft capacity can be realized in time-division multiple access (TDMA) wireless networks. Then, the interference reduction due to smart antennas, power control, and discontinuous transmission can be directly translated into capacity gain. This paper addresses the capacity gain due to multiple-beam (MB) smart antennas in TDMA wireless systems with soft capacity. The system capacity is determined analytically and by simulation. MB smart antennas with practical antenna pattern are used in this study. Perfect power control and discontinuous transmission are assumed in the simulation and the theoretical analysis. A novel call admission control algorithm is proposed to enhance the system capacity without degrading the signal quality. The TDMA system is assumed to be global system for mobile communications (GSM)-like, however, the analysis can be extended and applied to other TDMA systems.
ISSN:0018-9545
1939-9359
DOI:10.1109/TVT.2002.1015317