任意波形发生器的研究与设计

在任意波形发生器设计中,DDS技术具有成本低、功耗小、分辨率高和切换时间快等优点,但波形形状任意可编辑性较差;软件无线电技术可产生任意复杂波形,但切换时间慢。采用DDS和软件无线电相结合的技术,正弦波、三角波、方波等普通信号的产生用DDS实现;复杂无规则波形信号的产生用软件无线电实现;最后任意波形发生器通过波形存储器、相位累加器、取样时钟发生器、地址发生器等硬件平台设计和软件波形算法设计来共同完成。

Design and research of arbitrary waveform generator

in the arbitrary waveform generator design, the technology of DDS has the advantages such as lower cost,lower power consumption , higher resolution and faster switching etc, but has disadvantage in arbitrary programmability of waveform. The technology of software radio can generate arbitrary complex waveform,but switching time is slow. make use of the technology of combining DDS with software radio, the normal waveforms such as sine wave, triangular wave and square wave are generated by DDS,and the complex abnormal waveform is generated by software radio. In the end, the arbitrary waveform generator is accomplished by the software waveform arithmetic design and hareware platform de-sign such as phase accumulator,sampling time generator and address generator.