Software radio technology
Software radio technology, by definition, is the use of modern software to manipulate and control traditional “pure hardware circuits”. The important value of software radio technology lies in the fact that traditional hardware radio communication equipment serves only as the basic platform for wireless communications, while many communications functions are performed by software, breaking the historical pattern of the realization of the equipment's communications function relying solely on hardware development. Software radio technology emerged as a third revolution in the field of communications following fixed to mobile communications and mapping communications to digital communications。
Ii. Features of software radios
(1) strong flexibility. Software radios can easily add new features by adding software modules. It can communicate with any other station and act as a radio frequency relay for other stations. The software module can be changed or updated by wireless loading. In order to reduce costs, the software modules may be selected on the basis of the strength and weakness of the required functionality. I'll..
(2) be more open. Software radios can be updated or expanded as the device and technology evolve, as a result of a standardized, modular structure. Software can also be upgraded as needed. Software radios are not only capable of communicating with the new system, but also compatible with the old system. As a result, both extended the life of old institutional radios and ensured a long life cycle for software radios themselves。
Iii. Current status of software radios in the country
In china, considerable emphasis has been placed on software radio technology, which has been given priority in research projects under the ninth five-year plan and the fifteenth plan. The “multi-band multi-purpose radio technology” set up during the ninth five-year plan has broken through some of the key technology for software radios and developed four-channel multi-wave prototypes; the third-generation mobile communication system programme, td-scdma, is designed using software radio technology。
Introduction
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