基于全IP核和参数化的大带宽线性调频信号源设计

Design of Wide Bandwidth LFM Signal Source based on Full IP Core and Parameterization

针对DDS产生线性调频信号时的灵活性差和最高频率上限低的问题,基于全IP核和参数化的大带宽线性调频信号源,在设计时采用基于单斜率字输入的并行DDS结构。该结构在对DDS相位增量和相位偏置进行参数提取的基础上,采用了加法器、乘法器、累加器、直接数字频率合成器和多路选择器的全IP核模块化设计方法。最后,在对该结构进行板级仿真的基础上,对频带为0.75 GHz到1.15 GHz的线性调频信号产生进行了实现。

Aiming at the poor flexibility and low maximum-frequency limit during the production of LFM signals by DDs, and based on full IP core and parameterized large bandwidth LFM signal source, the parallel DDS architecture based on single slope word input is adopted in the design. With the extraction of DDS phase increment and phase offset parameters, adder, multiplier, accumulator, direct digital frequency synthesizer and multiplexer IP kernel module are employed in design of the structure, Finally, based on board level simulation of the structure, the generation of LFM signal with frequency band of 0.75 GHz to 1.15 GHz is realized.