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文件名称：软件 定义 无线电
文件大小：792KB
文件格式：PDF
更新时间：2016-01-02 06:41:29
软件 定义 无线电
In the past, radio systems were designed
to communicate using one or two waveforms.
As a result, two groups of people
with different types of traditional radio
were not able to communicate due to
incompatibility problems. For example,
the communication equipment of the
United States’ military branches could
not “talk” to each other. This problem
could be costly in times of war (e.g. the
Air Force could not communicate with
the Army) and during peace (e.g. police
could not communicate with fire fighters).
The need
to communicate
with people
using different
types of equipment can only be solved
using software programmable radios
because of its flexible architecture.