Interference sources include CSMA/CA radios, non-CSMA/CA co-channel interference radios, radios on adjacent channels, antenna sidelobe spill-over etc. when adjacent channel power from another transmitter “spills” into the working channelĪ radio link that works today may degrade at ANY time in the future due to co-location of interfering radios.when a “non-sharing” device purposely ignores regulatory requirements (usually by implementing a non-legal air-access protocol) and illegally operates in a “sharing channel” or.the channel must be shared and devices automatically back-off to allow sharing,. FREEBAND FREQUENCIES TO AVOID FREEIn the license-free bands, there are no guarantees that a channel will be free from interference. Shared use enforces channel-sharing access mechanisms and makes consideration of C/I (Carrier-to-Interference) important. Shared use of frequency channels is an overriding consideration because it affects the amount and variation of latency and link capacity. So, what are the pitfalls of transferring deterministic services (voice, video or mission-critical data) using license-exempt frequency bands? When the T/R spacing is too small, technical requirements for the duplexer are demanding. Small T/R spacing means that duplexer cost and complexity are overriding and limiting considerations. If the ISM Band technology is FDD, the equipment designers can choose the T/R spacing. Furthermore, regulations mandate Safety and EMC requirements for the radio terminal assemblies.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |