期刊文献+
共找到5篇文章
< 1 >
每页显示 20 50 100
Interference and Spectral Efficiency Analysis in Two-hop Cellular Network with Fixed Relays in FDD Mode 被引量:1
1
作者 李平 戎蒙恬 +1 位作者 黄磊 喻丹 《Journal of Shanghai Jiaotong university(Science)》 EI 2006年第3期361-367,共7页
This paper presented a scheme of two-hop cellular network with fixed relay nodes (FRN). Based on this scheme, co-channel interference and signal interference ratio(SIR) received by base station(BS) and FRN were analyz... This paper presented a scheme of two-hop cellular network with fixed relay nodes (FRN). Based on this scheme, co-channel interference and signal interference ratio(SIR) received by base station(BS) and FRN were analyzed. Both the theoretical analysis and simulation results show that the SIR can be improved significantly when relays are employed in the network. The higher spectral efficiency can be obtained due to the improved two-hop link quality through the use of adaptive modulation and coding (AMC). The antenna height of FRN and the cell radius of BS and that of FRN influence SIR received by BS and FRN and the system spectral efficiency greatly. The proper antenna height of FRN and cell radius of BS and that of FRN were also given to get the highest spectral efficiency. 展开更多
关键词 fixed relay nodes (FRN) signal interference ratio (SIR) two-hop cellular network frequency division diplex(FDD)
下载PDF
Performance Analysis of Two Frequency Reuse Schemes in Fixed Relay Systems
2
作者 黄磊 戎蒙恬 《Journal of Shanghai Jiaotong university(Science)》 EI 2007年第2期216-222,共7页
An upsurge of interest in relay-augmented infrastructure-based networks has appeared in recent years.Radio resource management in such relay systems has great influence on the system performance.How to utilize the lim... An upsurge of interest in relay-augmented infrastructure-based networks has appeared in recent years.Radio resource management in such relay systems has great influence on the system performance.How to utilize the limited frequency resources efficiently in the system is a hot research topic.In this paper,performance of frequency reuse schemes has been studied in fixed relay systems.A novel scheme is achieved by modifying an existing one.Theoretical model is proposed for the performance analysis of two schemes.Both the theoretical analysis and simulation results show that the modified scheme outperforms the existing one not only in power consumption of mobile stations but also in cell carrier-to-interference ratio coverage. 展开更多
关键词 frequency reuse fixed relay system power consumption carrier-to-interference ratio
下载PDF
Uplink Power Saving Potential of Cellular System with Fixed Relays
3
作者 史宏逵 戎蒙恬 +1 位作者 刘涛 喻丹 《Journal of Shanghai Jiaotong university(Science)》 EI 2007年第2期223-228,233,共7页
This paper presented a scheme of relayed cellular mobile telecommunication network,which only employs fixed digital relays and not more than two-hop relay routes.Power saving potential of the network is deeply studied... This paper presented a scheme of relayed cellular mobile telecommunication network,which only employs fixed digital relays and not more than two-hop relay routes.Power saving potential of the network is deeply studied under the assumption of not occupying additional frequency bands(i.e.relays share the same frequency bands as used by the base stations).Theoretical analysis and simulation results have both shown that,with the same radio coverage requirement,the necessary effective transmission powers in such a relayed network have greatly decreased compared to conventional cellular network. 展开更多
关键词 digital relay fixed relay two-hop cellular system power saving
下载PDF
Reuse Partitioning-Based Frequency Assignment in Fixed Two-Hop Relay Cellular Network
4
作者 刘涛 戎蒙恬 史宏逵 《Transactions of Tianjin University》 EI CAS 2007年第3期220-225,共6页
In relay cellular network, relay links will consume extra frequency resources, which makes radio resource allocation become more complex and important. A new frequency allocation scheme is proposed to increase cell ca... In relay cellular network, relay links will consume extra frequency resources, which makes radio resource allocation become more complex and important. A new frequency allocation scheme is proposed to increase cell capacity and improve signal-to-interference ratio (SIR) of users located at cell edges. By dividing cell into different parts and configuring each of these parts with a unique reuse factor, this scheme improves spectral utilization efficiency and avoids inter-cell interference effectively. Optimal combinations of reuse factors and locations of relay nodes are also addressed and investigated. Computer simulation results show that, by employing the proposed scheme, maximum cell capacity gains of about 50%, 35% and 30% can be achieved in comparison with conventional cellular network scheme, traditional reuse partitioning scheme and reuse-adjacent-cell-frequencies scheme, respectively. Moreover, since in the proposed scheme resources are dynamically allocated among relay nodes, more benefits can be obtained in comparison with fixed resource allocation schemes under non-uniform traffic distribution. 展开更多
关键词 reuse partitioning fixed relay node relay cellular network radio resource allocation
下载PDF
REUSE-PARTITIONING-BASED FREQUENCY PLANNING FOR TWO-HOP CELLULAR NETWORKS WITH NLOS BS-RELAY LINKS
5
作者 李平 戎蒙恬 +2 位作者 薛义生 喻丹 刘涛 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 2007年第1期59-67,共9页
The frequency planning for a cellular system enhanced with two-hop fixed relay nodes (FRNs) is investigated. It is assumed that there is no performance-enhancing technique on the base station (BS)-FRN links. Under... The frequency planning for a cellular system enhanced with two-hop fixed relay nodes (FRNs) is investigated. It is assumed that there is no performance-enhancing technique on the base station (BS)-FRN links. Under the assumed condition, two frequency planning schemes are proposed by the principle of reuse partitioning (RP). The frequency planning schemes are compared with the channel-borrowing-based frequency planning scheme and the conventional frequency planning scheme without relaying. Theoretical analysis and simulation results show that the proposed schemes can improve the service quality for mobile terminals close to cell boundaries and provide better performance over the channel-borrowing-based frequency planning. Finally, to fully exploit the potentials of FRN enhanced cellular system, some performance enhancing techniques on BS-FRN links are indispensable. 展开更多
关键词 cellular system frequency planning fixed relay node
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部