Data communication system with automatic frequency sweep in FM broadcast subchannel and continuous phase frequency-shift keying

调频广播副信道自动扫频连续相位频移键控数据通信系统

  • Inventors: QINGXU XIONG
  • Assignees: 熊庆旭
  • Publication Date: January 12, 2000
  • Publication Number: CN-1241073-A

Abstract

A continuous phase-frequency shift keying (CPFSK) data communication system features that the wireless communication of data is realized in subcarrier channel of frequency-modulated broadcast. In theimplementation, CPFSK digital modulation mode, switch sampling technique and coherent demodulation by means of pilot signal of frequency-modulated broadcast are used to realize the automatic frequency sweep in full frequency range (88-108 MHz) of frequency-modulated broadcast and locking the receiving frequency.
调频广播副载波信道自动扫频连续相位频移键控(CPFSK)数据通信系统,属于调频广播与无线数据通信技术领域。该发明实现了在调频广播副载波信道中数据的无线通信。在实现过程中,该发明采用了连续相位频移键控数字调制方式,采用了开关取样技术,以及借助调频广播导频信号进行相干解调。该发明可以实现调频广播全频段88—108MHz范围内自动扫频并锁定接收频率。系统实现框图如摘要附图所示。

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    WO-2011137658-A1November 10, 2011Zhou YunweiMode de modulation de fréquence complexe fm/variation linéaire de fréquence et son procédé de mise en œuvre