Abstract
Baseband transmission system have an irreplaceable role in the digital transmission system, its scope of application to penetrate into the network communication satellite communications, monitoring control, mobile communications, digital television, digital telephone life, science and technology in all aspects with the development of technology, thus increasingly becoming a key technology in the digital communications transmission system. Moreover, many of the problems of the base band system must be considered in a band transmission system. On the basis of this, paper discussed on the key technologies of communication system - digital baseband transmission (including baseband system structure, the transmission of the way their system to optimize the bit error rate analysis), focuses on the digital baseband transmission based on Matlab characteristics, use Matlab to design and simulation baseband system, use Simulink blocks to build its BER analysis model, thus deepening the baseband transmission characteristics analysis.
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