便携式DAB发射系统的实现

文中设计了DAB发射系统的硬件电路,其中包括FPGA芯片用于实现ODFM调制和外设接口模块,并利用可嵌入到此FPGA芯片的NiosⅡ软核处理器来实现数据控制。数字上变频芯片AD9957和数字可控增益放大芯片AD8369组成的功能电路以及USB芯片FT245用于实现DAB基带信号的上变频、信号放大及与计算机间的数据传输。该套DAB发射系统电路板尺寸为100 mm×160 mm,适用于便携式的DAB发射,经过测试具有较高的可靠性。

Implementation of Portable DAB Transmitter System

This paper designed hardware circuit of DAB transmitter system,FPGA chip was used to implement OFDM and interface modules,and NiosⅡsoft-core processors which was embedded into FPGA was used to achieve data control.Function circuit of AD9957,AD8369 and FT245 was used to implement digital upconverter of DAB baseband signal,DAB signal amplification and communication with computer.The DAB transmitter circuit board size was only 100 mm×160 mm,and it was portable for DAB transmitter.The tests show that this circuit transmit DAB signal with high reliability.