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抱歉,版主,刚才才看到本书已经在本版有过,
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 This book is about telecommunications: the basic concepts, the design of subsystems
 and the practical realization of the electronic circuits that make up
 telecommunication systems. The aim of this book is to fill a gap that exists in the
 teaching of telecommunications and electronic circuit design to electrical engineering
 students. Frequently, courses on electronic circuits are taught to students without
 a clear indication of where these circuits may be used. Later in their career, students
 may take a course in communication theory where the usual approach is to treat
 subjects such as modulation, frequency changing and detection as mathematical
 concepts and to represent them in terms of ‘‘black boxes’’. Thus the connection
 between the function ‘‘black boxes’’ and the design of an electronic circuit that will
 perform the function is glossed over or is completely missing.
 
 [ 本帖最后由 dzjian 于 2008-10-6 23:57 编辑 ]
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