【作者】 周启令； 王瑛； 王铁流； 王腾； 张银亮；

【Author】 ZHOU Qiling;WANG Ying;WANG Tieliu;WANG Teng;ZHANG Yinliang;Department of Informatics,Beijing University of Technology;Shenyang Qijie Technology Co.,Ltd;

【机构】 北京工业大学信息学部； 沈阳奇杰科技有限公司；

【摘要】 针对水声功率发射机因换能器宽带匹配出现的幅频特性不均衡问题,采用预失真处理技术,利用STM32F4处理器的DAC直接合成4FSK编码信号,在信源上对不同频率信号的强度进行校正,再配合D类线性功率放大器的增益自适应调整,使不同频率的FSK编码信号满足宽带内各频点幅值均衡的要求,从而实现换能器宽带匹配的进一步优化。更多还原

【Abstract】 To solve the imbalance problem of the amplitude-frequency characteristics of the underwater acoustic power transmitter due to the broadband matching of the transducer,this paper proposes a method which is based on pre-distortion processing technology,directly synthesizes 4FSK coded signals using the DAC of the STM32F4 processor and corrects the strength of different frequency signals on the source.Together with the adaptive adjustment of the gain of the class D linear power amplifier,the FSK coded signals of different frequencies can meet the requirements of the amplitude equalization of each frequency point in the wideband,and further optimization of the wideband matching of the transducer is achieved.更多还原