Abstract
Classically, thermal noise has been the workhorse of satellite communications due to the long distances to be covered between the satellite and the user terminal (UT). Lately, LDPC (Low-Density Parity-Check) codes allow the noise threshold to be set very close to the Shannon limit for the memory-less satellite channel; thus, solving the noise problem that turbo codes were not able to solve. However, recently, the high target rates in next generation 5G wireless terrestrial system are pushing the required spectral efficiency in Satellite Communications; therefore, shifting the SatCom paradigm towards an interference limited one. This paper revisits the 5G scene and the role of next generation satellite communications, with a special focus on high throughput satellites (HTS) together with the future accompanying MIMO interference mitigation techniques.
Highlights
The major business and focus are: Fixed Satellite Services (FSS)-DTH (Direct To Home) for new High Definition (HD), Ultra HD, 3D TV
Because of its broadband nature and potential to lower the cost per bit, high throughput satellites (HTS) is a potential wild card to help in attaining many of the 5G network requirements
Another alternative is to increase the complexity of the user terminal, which will carry out multiuser decoding in order to eliminate interference
Summary
The major business and focus are: FSS-DTH (Direct To Home) for new High Definition (HD), Ultra HD, 3D TV Another important market is IP trunking to connect parts of the backbone, either for internet or for VoIP, at 310 Mbps. Cellular backhauling for connecting cellular radio towers to the core network are currently working at 2 Mbps and, corporate and public VSAT for connecting a site to the IT network of a private or public organization These applications are carried out through GEO satellites and, while C-band use keeps flat in forthcoming years, Ku and Ka band use increases. To satisfy the technology agnostic consumer, the system must deliver services comparable to fiber-to-the-home and 3rd generation HTS systems will go a step further and offer a few hundred Gbit/s. Because of its broadband nature and potential to lower the cost per bit, HTS is a potential wild card to help in attaining many of the 5G network requirements
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