Multi-hop relay is a significant topic in the wireless communication and it is provisioned in the 802.16j standards.At present,the major research on multi-hop relay is focused on the capacity,coverage,coordination,thr...Multi-hop relay is a significant topic in the wireless communication and it is provisioned in the 802.16j standards.At present,the major research on multi-hop relay is focused on the capacity,coverage,coordination,throughput,etc.But in this paper,a new concept about power-effective was discussed.Then,two power-effective coverage extension methods using two sectorized cellular approaches were introduced,i.e.,the widebeam three sector cell(WBTC) and the narrow-beam three sector cell(NBTC).Under such topologies,the consumption of power and optimal numbers of base stations(BSs) and relay stations(RSs) with respect to various user traffic densities were investigated.Finally,it is found that the performance of WBTC is better than NBTC.展开更多
Secmotron(sector beam deflection modulation tube)is a new kind of high efficientmicrowave tube which is developed on the basis of gyrocon,The principle of gyrocon has beenanalyzed and it manifests that to increase cir...Secmotron(sector beam deflection modulation tube)is a new kind of high efficientmicrowave tube which is developed on the basis of gyrocon,The principle of gyrocon has beenanalyzed and it manifests that to increase circuit efficiency is necessary for improving the proper-ties of gyrocon.One of the key points is to increase its perveance.An idea about sector beam isproposed to reduce the effect of space charge.Also the concept and construction of transforminga column beam to a thin sector beam are presented.The numerical calculation of some specificstructure demonstrates that the above idea is realizable.展开更多
文摘Multi-hop relay is a significant topic in the wireless communication and it is provisioned in the 802.16j standards.At present,the major research on multi-hop relay is focused on the capacity,coverage,coordination,throughput,etc.But in this paper,a new concept about power-effective was discussed.Then,two power-effective coverage extension methods using two sectorized cellular approaches were introduced,i.e.,the widebeam three sector cell(WBTC) and the narrow-beam three sector cell(NBTC).Under such topologies,the consumption of power and optimal numbers of base stations(BSs) and relay stations(RSs) with respect to various user traffic densities were investigated.Finally,it is found that the performance of WBTC is better than NBTC.
文摘Secmotron(sector beam deflection modulation tube)is a new kind of high efficientmicrowave tube which is developed on the basis of gyrocon,The principle of gyrocon has beenanalyzed and it manifests that to increase circuit efficiency is necessary for improving the proper-ties of gyrocon.One of the key points is to increase its perveance.An idea about sector beam isproposed to reduce the effect of space charge.Also the concept and construction of transforminga column beam to a thin sector beam are presented.The numerical calculation of some specificstructure demonstrates that the above idea is realizable.
