An audiobeam loudspeaker system based on the fixed-point digital signal processor(DSP)TMS320VC5509A(VC5509A for short)is developed to emit audible sound with high directivity along a selected path.This system is compo...An audiobeam loudspeaker system based on the fixed-point digital signal processor(DSP)TMS320VC5509A(VC5509A for short)is developed to emit audible sound with high directivity along a selected path.This system is composed of preamplifier,anti-aliasing filter,ADC(analog to digital converter),VC5509A basic system,DAC(digital to analog converter),smoothing filter,ultrasonic power amplifier and ultrasonic transducer array.VC5509A is used to implement the key signal preprocessing algorithms,such as signal preprocessing,amplitude modulation,carrier signal generator,etc.The experiments show that this system has the advantages of high accuracy and good stability.展开更多
基金Science and Technology Development Plan of Shandong Province(No.2010GSF10809)
文摘An audiobeam loudspeaker system based on the fixed-point digital signal processor(DSP)TMS320VC5509A(VC5509A for short)is developed to emit audible sound with high directivity along a selected path.This system is composed of preamplifier,anti-aliasing filter,ADC(analog to digital converter),VC5509A basic system,DAC(digital to analog converter),smoothing filter,ultrasonic power amplifier and ultrasonic transducer array.VC5509A is used to implement the key signal preprocessing algorithms,such as signal preprocessing,amplitude modulation,carrier signal generator,etc.The experiments show that this system has the advantages of high accuracy and good stability.
