Regulations should be set for cognitive systems and for the prote...
Regulations should be set for cognitive systems and for the protection of other services, the Asia-Pacific Broadcasting Union (APBU) said in preliminary views for the 2012 World Radiocommunication Conference. The union wants to define software-defined radios and cognitive radio…
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systems, including modulation methods, power levels and their ability to sense existing transmitters, it said in a submission to ITU-R. “The technical protection criteria for existing applications in the existing services must be developed band by band,” it said. Protecting cognitive radio systems from existing applications may be difficult because of the inability to detect them, APBU said. While the systems may operate in a fixed broadcasting satellite uplink band without a claim of protection, the systems aren’t feasible for operation in downlinks because of the power flux density in the bands, it said. The devices may also be a candidate for a free to air return link for interactive broadcasting applications, especially below 1 GHz, the union said.