The current mobile communication many kinds of standard coexist, different standard USES different working band, different modulation mode, cause between system for mobile users to each other, the roaming a constrained. While software radio is a promising technology to solve these problems.
Software radio is refers to develop a fully programmable hardware platform, all through the application of the software on the platform for the programming. In other words, the different systems stations and mobile terminal can build on the same hardware by based on different software realization. This technology will be able to ensure various mobile platform, various mobile communications equipment and seamless integration between greatly reduced the construction cost.
Can foresee, based on software radio mobile communication will has the following features:
(1) on the same hardware platform compatibility different system;
(2) with automatic roaming capabilities, can in an intelligent switching between different systems;
(3) can download utility software and upgrade themselves;
(4) support voice, data, video and fax and so on many kinds of business, and can according to business flow, channel quality, etc., automatic choose appropriate transmission channel;
(5) automatically selects the communication mode, adopting appropriate communications protocol and signal formats realizes the far-end communications.
Software radio in mobile communication, to change fundamentally the application of mobile communication network structure and realizing wired and wireless networks fusion and can accommodate various standards, protocols. Provide more open interface, eventually greatly increase network flexibility.
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