WCDMA for UMTS: Radio Access for Third Generation Mobile Communications
WCDMA for UMTS: Radio Access for Third Generation Mobile Communications
UCAN: a unified cellular and ad-hoc network architecture
Proceedings of the 9th annual international conference on Mobile computing and networking
TDD-CDMA for the 4th generation of wireless communications
IEEE Wireless Communications
Comparison of time slot allocation strategies for CDMA/TDD systems
IEEE Journal on Selected Areas in Communications
Integrated cellular and ad hoc relaying systems: iCAR
IEEE Journal on Selected Areas in Communications
Dynamic load balancing and sharing performance of integrated wireless networks
IEEE Journal on Selected Areas in Communications
Congestion-based routing strategies in multihop TDD-CDMA networks
IEEE Journal on Selected Areas in Communications
Integrated Radio Resource Allocation for Multihop Cellular Networks With Fixed Relay Stations
IEEE Journal on Selected Areas in Communications
Outage analysis in presence of correlated interferers in a cognitive radio CDMA network
International Journal of Communication Networks and Distributed Systems
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Multihop TDD-CDMA cellular system becomes a promising candidate for fourth generation (4G) cellular systems because it provides wider coverage and higher throughput. In this paper, we analyze the uplink system capacity of a multihop TDD-CDMA cellular system. We first analyze a one-hop TDD-CDMA cellular system with different base station's (BS's) direct coverage area. We find that the system capacity can be improved if a BS only covers a center small area of the cell. Besides, the high downlink transmission power of the surrounding BSs can degrade the capacity severely. Thus, we propose a multihop TDD-CDMA cellular system to overcome the high downlink inter-cell interference. In our system, a cell area is divided into two regions: inner-region and outer-region. The mobile users in the inner- and outer- region of the cell communicate with BS and relay station (RS), respectively. Based on this model, the uplink system capacity in both regions with the assumption that the inter-cell and intra-cell interference follow the Gaussian distribution is obtained. A comparison equation to provide a fair comparison with conventional one-hop TDD-CDMA cellular system is presented. From the results, we conclude that multihop TDD-CDMA cellular system can improve capacity significantly.