This paper has identified the main research and development programs in HAPS and their applications across the world.The spectrum and licensing issues are presented according to the latest ITU recommendations.To make ...This paper has identified the main research and development programs in HAPS and their applications across the world.The spectrum and licensing issues are presented according to the latest ITU recommendations.To make HAPS play a vital role in the integrated telecommunication and broadcast network in the future,some proposals are given.展开更多
This paper proposes a novel micro/macro beam coverage scheme used in High Altitude Platform System (HAPS) Code Division Multiple Access (CDMA) systems. A relief of traffic burden in hot spot areas is achieved by embed...This paper proposes a novel micro/macro beam coverage scheme used in High Altitude Platform System (HAPS) Code Division Multiple Access (CDMA) systems. A relief of traffic burden in hot spot areas is achieved by embedding micro-beams into the macro-beams at the hot spot locations, together with appropriate power ratio control and user ratio control. The simulation results show that the hot spot problem can be relieved efficiently with the presented configuration, and a higher and more stable system capacity is expectable despite the variation of user distribution.展开更多
文摘This paper has identified the main research and development programs in HAPS and their applications across the world.The spectrum and licensing issues are presented according to the latest ITU recommendations.To make HAPS play a vital role in the integrated telecommunication and broadcast network in the future,some proposals are given.
文摘This paper proposes a novel micro/macro beam coverage scheme used in High Altitude Platform System (HAPS) Code Division Multiple Access (CDMA) systems. A relief of traffic burden in hot spot areas is achieved by embedding micro-beams into the macro-beams at the hot spot locations, together with appropriate power ratio control and user ratio control. The simulation results show that the hot spot problem can be relieved efficiently with the presented configuration, and a higher and more stable system capacity is expectable despite the variation of user distribution.
