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Surface acoustic wave-matched filter and differential detector for demodulating spread spectrum signals
Surface acoustic wave-matched filter and differential detector for demodulating spread spectrum signals
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机译:表面声波匹配滤波器和差分检测器,用于解调扩频信号
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摘要
A surface acoustic wave-matched filter is disclosed which comprises: an input transducer provided on a piezoelectric substrate surface; a first output transducer, that is, a forward output transducer encoded in correspondence to a pseudo-noise code sequence for spectrum spreading and provided on the substrate surface; and a second output transducer, that is, a backward output transducer encoded in correspondence to the pseudo-noise sequence code and provided on the substrate surface at the succeeding to the forward output transducer by the length of the pseudo-noise code sequence as viewed from the input transducer. With the use of the surface acoustic wave-matched filter, it is possible to realize a differential detector for demodulating spread spectrum signals.
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