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    • 4. 发明专利
    • Synchronous detection demodulator
    • JP4730219B2
    • 2011-07-20
    • JP2006163152
    • 2006-06-13
    • パナソニック株式会社
    • 直也 今橋堅士 山本正和 帆足潤寧 馬場
    • H04B1/7087H03D3/02H04B1/707H04B1/7073
    • PROBLEM TO BE SOLVED: To provide a synchronous detector/demodulator in which normal signal demodulation can be performed at all times by eliminating trouble in synchronization and AFC operation, and wireless communication can be carried out efficiently without sacrifice of communication quality. SOLUTION: The synchronous detector/demodulator comprises A/D converters 301, 302 for converting a received signal subjected to wireless demodulation into a digital baseband signal, a Barker demodulating section 303 for extracting the frequency and phase component by Barker demodulation processing, an arc tangent operating section 304 for detecting the phase of a digital baseband signal, a synchronous detection and AFC processing section 309 for extracting the frequency shift and phase error from the phase of a received signal depending on demodulation symbol data, a vector rotate processing section 305 for correcting the phase of the received signal being converted into a received signal following up the transmission frequency based on an extracted phase signal, an equalizer 306 for shaping the waveform of the received data subjected to phase correction, and a Barker demodulating section 307 for demodulating a spread signal. COPYRIGHT: (C)2008,JPO&INPIT