Under the same transmitting power

the ultrasonic flow measurment system with coded excitation and pulse compression

has higher signal to noise ratio（SNR） and resolution compared to the single pulse excitation system.To study the effect of some parameters such as code type and code width on its measurement performances

an ultrasonic flow measurement system with coded excitation is designed on FPGA configuration.Due to its flexible structure

binary phase-modulated signals with various codes or different band widths as well as the linear frequency modulated signals with different time-bandwidth products can both be generated.The system provides an experimental platform for further investigations on ultrasonic flow measurements with coded excitation.