Различия
Здесь показаны различия между двумя версиями данной страницы.
| Предыдущая версия справа и слева Предыдущая версия Следующая версия | Предыдущая версия Следующая версия Следующая версия справа и слева | ||
|
remcom_extra [2020/01/29 09:57] potapoff |
remcom_extra [2020/11/27 10:37] potapoff |
||
|---|---|---|---|
| Строка 4: | Строка 4: | ||
| ---- | ---- | ||
| - | **Providing Narrowband IoT Coverage with Low Earth Orbit Satellites** | + | === Providing Narrowband IoT Coverage with Low Earth Orbit Satellites === |
| Kenneth M. O’Hara, Gregory J. Skidmore, MWJ 2019'12 | Kenneth M. O’Hara, Gregory J. Skidmore, MWJ 2019'12 | ||
| + | |||
| + | {{:remcom_extra:clip201127-103704.png?300}} | ||
| This article describes the modeling of a SATCOM link, specifically the use case of using a satellite overlay to extend service continuity to IoT devices in a poorly covered rural area. Non-terrestrial wireless networks (e.g., satellite constellations or high altitude platforms) have unique advantages—wide area service coverage and long-term reliability — which make them important components in the heterogeneous 5G global system of networks. Non-terrestrial networks (NTN) will likely play a critical role providing service to locations not covered by terrestrial 5G networks, such as rural and remote areas, moving platforms and disaster-stricken zones. One use case for NTNs is providing service continuity for machine-to-machine (M2M) or IoT devices as they move out of 5G terrestrial network coverage.1 This is particularly important for M2M/IoT devices which provide critical communications (e.g., applications in eHealth or vital asset tracking). | This article describes the modeling of a SATCOM link, specifically the use case of using a satellite overlay to extend service continuity to IoT devices in a poorly covered rural area. Non-terrestrial wireless networks (e.g., satellite constellations or high altitude platforms) have unique advantages—wide area service coverage and long-term reliability — which make them important components in the heterogeneous 5G global system of networks. Non-terrestrial networks (NTN) will likely play a critical role providing service to locations not covered by terrestrial 5G networks, such as rural and remote areas, moving platforms and disaster-stricken zones. One use case for NTNs is providing service continuity for machine-to-machine (M2M) or IoT devices as they move out of 5G terrestrial network coverage.1 This is particularly important for M2M/IoT devices which provide critical communications (e.g., applications in eHealth or vital asset tracking). | ||
| [[https://vk.com/doc528950839_535595097|Читать полностью]] | [[https://vk.com/doc528950839_535595097|Читать полностью]] | ||
| + | |||
| + | ---- | ||
| + | |||
| + | **FDTD Simulation: Optimizing an LTE Antenna's Matching Network** | ||
| + | |||
| + | A simple antenna for LTE band operation is added to the PC board of a smartphone in XFdtd and the matching circuit is tuned for operation in multiple frequency bands. The components in the matching network are chosen to maximize system efficiency. | ||
| + | Figure 1 shows the antenna being used, which is a simple strip fed off center. It can be thought of as two back-to-back inverted L antennas of different “top” lengths, though the operating modes are more complicated than that. Figure 2 shows system efficiency for this antenna when fed directly and demonstrates that matching is required to improve performance. | ||
| + | |||
| + | [[https://vk.com/doc528950839_535839179|Читать полностью]] | ||
| ---- | ---- | ||