摘要
为了对声目标信号参数的准确估计,本文设计的声目标信号采集系统是以STM32为控制逻辑单元,具有同步采样的ADS7864芯片为AD单元,以双片MAX9812级联为话筒放大电路,通过USB接口实时传输数据给上位机进行处理。系统在软件的控制下完成声信号的采集。通过实际测试,本系统具有高增益、高灵敏度、干扰小和完全同步采样等特点。用采集到的数据进行MUSIC计算,能正确估计声目标信号的波达方向(DOA)。
In order to accurately estimate the parameters of acoustic target signal, the sound of the target signal acquisition system designed in this paper based on the STM32 control logic unit, a the ADS7864 chip synchronous sampling AD unit, two-piece MAX9812 cascaded microphone amplifier circuit,USB interface, real-time transmission of data to the host computer for processing. The system under software control to complete the acquisition of the acoustic signal. Through testing, this system has the characteristics of high gain, high sensitivity, interference, and fully synchronized sampling. MUSIC, collected data can be correctly estimated direction of arrival （DOA） of the sound of the target signal.
出处
《软件》
2013年第2期17-21,共5页
Software
关键词
声信号采集
同步采样
STM32
波达方向(DOA)估计
MUSIC
acoustic signal acquisition
synchronous sampling
STM32 Programr
STMicroelectronics direction of arrival （DOA）estimation
MUSIC
