Broadband ADCP digital signal processing based on CIC filter banks  

基于CIC滤波器组的宽带ADCP数字回波处理（英文）

作　　者：YAN Yu CHEN Shi-li ZENG Zhou-mo 闫宇;陈世利;曾周末(天津大学精密测试技术与仪器国家重点实验室,天津300072)

机构地区：[1]State Key Laboratory of Precision Measuring Technology and Instruments,Tianjin University,Tianjin 300072,China

出　　处：《Journal of Measurement Science and Instrumentation》2019年第2期116-125,共10页测试科学与仪器（英文版）

摘　　要：The acoustic Doppler current profilers(ADCP)as a new type of flow measuring equipment,can measure the flow velocity of the channel section directly.ADCP has the advantages of short measuring time and wide measuring range.The traditional ADCP processing system uses analog method to realize demodulation and filtering,which will introduce extra errors.While digital processing system will greatly increase the computation and slow down the speed of data processing.To solve this problem,an efficient real-time broadband ADCP digital signal processing system is proposed based on the low computational cascade integrator comb(CIC)cascade and interpolated second-order polynomial(ISOP)filter banks.The digital in-phase and quadrature(IQ)demodulation,CIC filter banks,and complex autocorrelation operation steps are cascaded with a pipelined method in the system,which greatly improves the system operating speed while avoiding the high memory occupation of non-real-time systems.

关 键 词：acoustic Doppler current profilers(ADCP) in-phase and quadrature(IQ)demodulation cascade integrator comb(CIC) interpolated second-order polynomial(ISOP) autocorrelation operation 

分 类 号：TB565.4[交通运输工程—水声工程]