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Digital fishery interphone private protocol control method using 4FSK (Frequency Shift Keying)

A 4FSK, walkie-talkie technology, applied in the direction of two-party line system stations, FM carrier systems, etc.

Inactive Publication Date: 2012-06-20
TIANJIN 712 COMM & BROADCASTING CO LTD
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Problems solved by technology

[0002] With the maturity of digital walkie-talkie technology, DMR, dPMR and other digital walkie-talkie technologies have been widely used, but there is a blank for short-band digital walkie-talkies in the market, and no manufacturers have developed digital walkie-talkies for this frequency band. In order to adapt to this trend, The analog fishery digital walkie-talkie, the signaling channel adopts MSK modulation for signaling interaction

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  • Digital fishery interphone private protocol control method using 4FSK (Frequency Shift Keying)
  • Digital fishery interphone private protocol control method using 4FSK (Frequency Shift Keying)

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Embodiment Construction

[0009] In order to understand the present invention more clearly, describe in detail in conjunction with accompanying drawing and embodiment:

[0010] Such as figure 1 As shown, using the control method of the digital fishery walkie-talkie proprietary protocol of 4FSK, the hardware of the digital fishery walkie-talkie applying the method mainly includes a receiving channel module, a 4FSK demodulation module, a 4FSK modulation module, a transmitting call signaling processing module, and a receiving call Signaling processing module, transmitting channel module and ARM processor; pre-installed software program in ARM processor, software program includes: receiving channel module software, 4FSK demodulation module software, receiving call signaling processing module software, transmitting channel module software , 4FSK modulation module software block, transmitting call signaling processing module software; receiving channel module, 4FSK demodulation module, 4FSK modulating...

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Abstract

The invention relates to a digital fishery interphone private protocol control method using 4FSK (Frequency Shift Keying). In the method, a 4FSK modulation mode is adopted for carrying out calling signaling transmission on a digital fishery interphone, and the 4FSK modulation mode is used for digital calling signaling sending and digital calling signaling receiving. The method comprises the following steps: step 1, after a receiving channel receives a calling signal, demodulation, frame header removal and the like are carried out by a 4FSK demodulation module, error correcting codes are used for error correction and detection, and the signal is reduced into digital fishery calling control signaling; and step 2, when an emission channel is to emit calling signals, modulation, frame header addition and mismatch correction are carried out by the 4FSK modulation module, and then the signals are modulated into 4FSK signals to be sent. The method has the advantage that a digital interphone used for a short-wave band is added, so that a user can select different digital technology forms according to different use conditions, environments and needs.

Description

technical field [0001] The invention relates to the field of fishery wireless communication equipment, in particular to a digital fishery walkie-talkie proprietary protocol control method using 4FSK. Background technique [0002] With the maturity of digital walkie-talkie technology, DMR, dPMR and other digital walkie-talkie technologies have been widely used, but there is a blank for short-band digital walkie-talkies in the market, and no manufacturers have developed digital walkie-talkies for this frequency band. In order to adapt to this trend, The analog fishery digital walkie-talkie, the signaling channel adopts MSK modulation for signaling interaction. After the fishery walkie-talkie is specially designed for the digital mode, in order to process the call signaling of the digital fishery walkie-talkie, it is necessary to use the 4FSK modulation and demodulation mode to realize the signaling control of the digital mode. Therefore, this technology is researched a...

Claims

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Application Information

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IPC IPC(8): H04Q5/24H04L27/10
Inventor 张青平王宁孟令强
Owner TIANJIN 712 COMM & BROADCASTING CO LTD
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