An Ultrasonic Pulse Compression System for Nondestructive Testing Using Complementary Series Phase Modulation : Acoustical Measurements and Instrumentation

An ultrasonic pulse compression system is presented, which employs complementary series phase modulated signals as transmit signals to obtain theoretically zero range sidelobes and high efficiency. In correlation based signal processing, echoes are correlated with reference signals that have the same wave forms as the echoes. The effectiveness of this signal processing over the conventional one using transmit signals as reference signals is verified by experiments.