Application of binary excitation spread spectrum signals for spectral compensation
作者： Linas Svilainis , Alberto Rodriguez-Martinez , Andrius Chaziachmetovas , Arturas Aleksandrovas
DOI: 10.1109/IDAACS.2017.8095257
关键词:
摘要: Ultrasonic probing usually uses pulse signals. Resolution of the ultrasonic imaging depends on bandwidth received signal. It is also important while measuring thin materials. Wide and flatness in ultrasound spectroscopy 1. Bandwidth signal mainly limited by transducer. Both SNR improvement can be accomplished using spread spectrum signals that have been compensated for spectral losses. Yet, such require arbitrary waveform generation digital-to-analog converter linear power amplifier. Equipment size, cost efficiency excitation are an issue case. Frequency modulation (both frequency nonlinear modulation) explore amplifier capabilities better, but still suffer size efficiency. Essential, derivation approximate procedure. Rectangular pulses relatively easy to generate offer small equipment low cost. Spread generated position width (APWP) sequences. Unfortunately, (chirp) large ripple. Direct APWP sequences a lengthy process. Novelty approach presented this paper modulated amplitude converted into bipolar sequence used further optimization improve
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