The prediction of the time and the spatial profile for broadband land mobile services using UHF and SHF bands

The prediction of the time and the spatial profile for broadband land mobile services using UHF and SHF bands

Propagation Effects Relating to Terrestrial Land Mobile Service in the Vhf and Uhf Bands

The ITU Radiocommunication Assembly, considering a) that there is a need for information on aspects of propagation likely to affect terrestrial land mobile services, recommends 1 that the information contained in Annex 1 be taken into account in the design and planning of such services. 1 Introduction This Recommendation provides information on various aspects of propagation which are likely to...

سنجش اثرات سبزینگی گیاهی در تحولات فضایی شدت جزیره حرارتی سطح کلانشهر تهران با استفاده از تصاویر ماهواره‌ای LANDSAT8 و ASTER

The simplest definition of urbanization is that urbanization is the process of becoming urban. Urban climate is defined by specific climate conditions which differ from surrounding rural areas. Urban areas, for example, have higher temperatures than surrounding rural areas and weaker winds. Land Surface Temperature is an important phenomenon in global climate change. As the green house gases in...

Broadband and Low Profile Antenna for Uhf Band

The requirement of wideband and compact devices is ever increasing in most communication systems. In addition, recent increases in the transmission and reception of information have created a need for broadband and low profile antennas. This necessity is particularly challenging in designing Radio Frequency (RF) products that demand these features at low RF bands. There are numerous situations ...

LTE and DVB-T Coexistence: A Simulation Study in the UHF Frequency Band

The introduction of new mobile services, mainly UMTS (Universal Mobile Telecommunications System) and LTE (Long Term Evolution), in the digital dividend portion of the UHF spectrum (from 790 MHz to 862 MHz), resulting from the digital switchover process, makes necessary the assessment of how much the interference of these signals impacts on QoS of existing DVB-T services, in particular when ope...