Reserrch And Realization Of Underwater Acoustic Transceiver Based On STM32

The gradual scarcity of land resources has led humans to shift their attention and focus to the oceans rich in resources.As a tool for human exploration of marine resources,underwater sound-transmitting and translating equipment is also attracting more and more attention.The commonly used underwater acoustic communication equipment costs relatively high,and it is a waste of resources to carry out simple information transmission in shallow seas at close range.Under this background,This paper designs a low-cost,low-power underwater acoustic transceiver based on the STM32 hardware platform.The specific work is as follows:Firstly,according to the idea of software radio,the overall structure of the underwater acoustic transceiver is designed,its working principle and hardware components are explained,and software design is completed.Since the available frequency band of the underwater acoustic channel is relatively narrow,in order to make full use of the frequency band,a 16-QAM modulation and demodulation method is selected.Then,the key technologies of the underwater acoustic transceiver are studied in depth,mainly including the phase-locked loop technology of the carrier recovery module and the Gardner algorithm of the timing synchronization module.The theoretical derivation analysis method is used to illustrate the working process of the core algorithm.Secondly,the overall simulation of the hydroacoustic transceiver on the MATLAB platform is performed,the key technologies used are verified,and the simulation results are used to analyze the applicability of the algorithm.At the same time,the tap coefficients of the filter of the transceiver are completed by using the toolbox of MATLAB,and the filtering results of the filter are compared with the filtering results of the MATLAB function.Finally,based on the existing experimental conditions,the hardware experiment platform was set up,and the peripherals were clocked and pinned.Then the software simulation program was transplanted to the development board with STM32 as the core,and the STM32 was connected with the ultrasonic ranging module for joint testing to forfurther verify the applicability of the key algorithm on the hardware platform.And use serial assistant and oscilloscope to complete the test and result analysis.