基于相位编码技术的超大功率超声收发系统研究  

Research of ultrasound emission and receiving system based in phase coding technology

作　　者：邓勇[1] 

机构地区：[1]华南理工大学机械与汽车工程学院,广东广州510641

出　　处：《电子设计工程》2015年第11期122-124,共3页Electronic Design Engineering

摘　　要：针对Golay互补序列相位编码信号在超声收发系统中的应用,给出了一种实现的方法,将Golay二相编码经过合理的调制通过超声换能器激发,对于回波信号采用正交解调技术还原相位编码信号,再通过匹配滤波压缩脉冲,得到高信噪比的成像信号。并用软件得到仿真的结果,结果表明,对于对系统帧率要求较低以及不存在检测对象位移的工业大功率超声系统,是一种理想的编码方式,超声收发系统当中Golay相位编码信号可得到较高的信噪比,普通单次发射相位编码信号的2倍。Aiming at the application of Golay complementary sequences phase encoding signal inultrasonic transceiver system, a method is also presented in the Golay binary code,through the appropriate modulation by ultrasonic transducer excitation, the echo signalby orthogonal demodulation technique for reducing phase coded signal, and then through the compressed pulse matched filter, get the imaging signal and high signal-to-noise ratio. Software is used to obtain the results of the simulation, results show that, forthe system frame rate requirements of industrial high power ultrasonic system is relatively low and does not exist the detection object displacement, is an ideal way of coding,ultrasonic transceiver system Golay phase coded signals can get a higher signal-to-noise ratio, two times the normal single shot phase encoded signals.

关 键 词：相位编码 脉冲压缩 GOLAY码 匹配滤波 

分 类 号：TN99[电子电信—信号与信息处理]