The optimum bandwidth of chirp signals in ultrasonic applications
作者： M. Pollakowski , H. Ermert , L.von Bernus , T. Schmeidl
DOI: 10.1016/0041-624X(93)90049-6
关键词: Band-pass filter 、 Pulse compression 、 Bandwidth (signal processing) 、 Ultrasonic sensor 、 Transfer function 、 Physics 、 Transducer 、 Chirp 、 Acoustics 、 Broadband
摘要: Abstract A new formula for the pulse-compression ratio achievable with linear FM pulses (chirp signals) in ultrasonic applications is derived. The calculations take into account frequently omitted effects of transfer function an transducer. For a squared-cosine type transducer spectrum, optimum chirp signal bandwidth 1.14 times 6 dB 2.24 lower than case ideal broadband Measurements show close agreement presented theory.
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