CN216216878U

CN216216878U - Maritime wireless communication system with good transmission effect

Info

Publication number: CN216216878U
Application number: CN202122672780.2U
Authority: CN
Inventors: 赵玉龙
Original assignee: Shanghai Quanshijie Electronics Co ltd
Current assignee: Shanghai Quanshijie Electronics Co ltd
Priority date: 2021-11-03
Filing date: 2021-11-03
Publication date: 2022-04-05
Anticipated expiration: 2031-11-03

Abstract

The utility model relates to the technical field of maritime communication, in particular to a maritime wireless communication system with a good transmission effect, which comprises a main control MCU, an AIS channel and a VHF channel, wherein the main control MCU is connected with the AIS channel and the VHF channel in a bidirectional mode, the AIS channel is connected with the VHF channel, the AIS channel comprises a T/R module, an LNA module, a superheterodyne receiving module and a two-point harmonic power amplification module, and the VHF channel comprises a T/R module, an LNA module, a power amplification module, a frequency phase-locked loop, a receiving radio frequency front end and an integration module. The utility model has the advantage that the good transmission effect of maritime communication can be ensured in the complex maritime signal communication situation.

Description

Maritime wireless communication system with good transmission effect

Technical Field

The utility model relates to the technical field of maritime communication, in particular to a maritime wireless communication system with a good transmission effect.

Background

The maritime communication refers to information transmission between maritime targets such as ships, beacons, oil and gas exploitation platform stations and the like and maritime targets, between maritime targets and shore stations, between shore stations and shore stations or between maritime targets and airplanes through maritime satellites or other means, with rapid development of the world shipping industry, maritime signal communication conditions become more and more complex, and in order to ensure good transmission of maritime communication, a maritime wireless communication system with good transmission effect is provided.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a maritime wireless communication system with good transmission effect, so as to solve the problems mentioned in the background art.

In order to achieve the purpose, the utility model provides a maritime wireless communication system with a good transmission effect, which comprises a main control MCU, an AIS channel and a VHF channel, wherein the main control MCU is connected with the AIS channel and the VHF channel in a bidirectional mode, the AIS channel is connected with the VHF channel, the AIS channel comprises a T/R module, an LNA module, a superheterodyne receiving module and a two-point harmonic power amplifier module, and the VHF channel comprises a T/R module, an LNA module, a power amplifier module, a frequency phase-locked loop, a receiving radio frequency front end and an integration module.

As a further improvement of the technical solution, the superheterodyne receiving module of the AIS path is connected with the two-point tone, the two-point tone is connected with the power amplifier module, the power amplifier module is connected with the T/R module, and two ends of the LNA module are connected with the superheterodyne receiving module and the T/R module.

As a further improvement of this technical scheme, the frequency phase-locked loop of VHF passageway is connected with receive the radio frequency front end, T/R module both ends are connected with the LNA module, the LNA module is connected with receive the radio frequency front end, receive the radio frequency front end and be connected with the integration module, the integration module is connected with receive the radio frequency front end, receive the radio frequency front end and be connected with the power amplifier module, the power amplifier module is connected with the T/R module.

As a further improvement of the technical solution, the main control MCU is bidirectionally connected to the superheterodyne receiving module, the frequency-locked loop and the integration module, and the two-point modulation is bidirectionally connected to the frequency-locked loop.

As a further improvement of the technical scheme, the LNA module of the VHF channel adopts a DSC channel, and the power amplifier module of the VHF channel adopts a VHF channel.

As a further improvement of the technical scheme, the integration module comprises VHF voice/Scramble and DTMF/NWR/NOAA DSC/ATTS.

Compared with the prior art, the utility model has the beneficial effects that:

1. in the maritime wireless communication system with good transmission effect, the maritime information communication transmission effect can be ensured in a complex signal condition by adopting a mode of strengthening signal receiving and sending through a set of wireless communication scheme.

Drawings

Fig. 1 is a schematic diagram of a communication scheme of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Example 1

Please refer to fig. 1, the embodiment provides a maritime wireless communication system with good transmission effect, which includes a main control MCU, an AIS path and a VHF channel, wherein the main control MCU is bidirectionally connected with the AIS path and the VHF channel, the AIS path is connected with the VHF channel, the AIS path includes a T/R module, an LNA module, a superheterodyne receiving module, and a two-point harmonic power amplifier module, and the VHF channel includes a T/R module, an LNA module, a power amplifier module, a frequency-locked loop, a receiving rf front end, and an integration module.

Furthermore, a superheterodyne receiving module of the AIS channel is connected with two tones, the two tones are connected with a power amplifier module, the power amplifier module is connected with a T/R module, and two ends of the LNA module are connected with a superheterodyne receiving module and a T/R module.

Furthermore, the frequency phase-locked loop of the VHF channel is connected with a receiving radio frequency front end, the two ends of the T/R module are connected with LNA modules, the LNA modules are connected with a receiving radio frequency front end, the receiving radio frequency front end is connected with an integration module, the integration module is connected with a receiving radio frequency front end, the receiving radio frequency front end is connected with a power amplifier module, and the power amplifier module is connected with the T/R module.

Furthermore, the master control MCU is bidirectionally connected with the superheterodyne receiving module, the frequency phase-locked loop and the integration module, and the two-point modulation is bidirectionally connected with the frequency phase-locked loop.

In addition, the LNA module of the VHF channel adopts a DSC channel, and the power amplifier module of the VHF channel adopts a VHF channel.

Specifically, the integration module comprises VHF voice/Scramble and DTMF/NWR/NOAA DSC/ATTS.

The superheterodyne receiving module in this embodiment adopts CMX7032 or CMX7042, and the CMX7032/7042 supports GMSK/FSK Modem and AIS/DSC format messages, and has a first-and-second-receiver, supports SOTDMA and csdma, 4-way 10-bit ADC and 2-way 10-bit DAC, where the CMX7032 supports a two-way frequency synthesizer.

The frequency phase-locked loop of the embodiment adopts a CMX940 frequency synthesizer, and the CMX940 frequency synthesizer is characterized by a double-path phase-locked loop and a double-built-in low-noise VCO and can provide a first-stage local oscillator and a second-stage local oscillator at the same time; a 16 or 24-bit fractional frequency synthesizer; the radio frequency output width is 49-2040 MHz; the bottom noise is low-225 dBc/Hz; the phase noise is low at-123 dB/Hz @435MHz and 25KHz frequency offset; the two paths of programmable RF outputs have large dynamic range; a reference frequency programmable output; a built-in low-noise VCO-142dBc/Hz and a 1MHz frequency offset @435 MHz; the stray is low; automatic VCO selection and calibration.

The receiving radio frequency front end of the embodiment adopts a CMX992 radio frequency receiving front end, and the CMX992 is characterized by two-stage down conversion and can construct superheterodyne receiving or I/Q demodulation receiving; providing a built-in frequency synthesizer as a built-in intermediate frequency LO; I/Q double-path output and single-path output, namely zero intermediate frequency and low intermediate frequency can be realized; two paths of intermediate frequency signals can be output, and purposes meeting different channel characteristics are constructed; the input dynamic range is large; and (4) two-way programmable output.

The integration module of the embodiment adopts a CMX85 maritime dedicated VHF Class D baseband processor, and the CMX885 is characterized in that voice/DSC/NOAA NWR are processed simultaneously; speech contains pre/de-emphasis, scrambling, etc.; the signaling comprises DTMF/tone/NOAA NWR; VHF DSC/ATIS modem; 2 paths of 4 input ADCs and 4 paths of DACs; single point/two point modulation.

The T/R module of the embodiment adopts a VDES1000 VDES communication module, and the VDES1000 is characterized by being completely compatible with AIS Class A; fully compatible VDES (AIS Class A + ASM + VDE); software can be upgraded; the output power is 12.5 Wrms; the frequency range is 152.025-162.025 MHz; 6 with isolation RS422 interface; 1 relay interface; 1 1000M base-T; 24V of single-voltage power supply; can simultaneously provide 7-path signal reception (AISx2, DSC, ASMx2, VDEx 2).

The main control MCU of the embodiment adopts a CMX7031/7041 maritime special VHF Class D baseband processor, and the CMX7031/7041 is characterized in that voice/DSC/NOAA NWR/FFSK are processed simultaneously; speech contains pre/de-emphasis, scrambling, companding; the signaling comprises DTMF/tone/NOAA NWR; the subsonic sound comprises CTCSS, DCS and XTCSS; support VHF DSC/ATIS DSC extended formats; 2 paths of 4 input ADCs and 4 paths of DACs; 559bps PSK modulator; single point/two point/IQ quadrature modulation, in which CMX7031 has two-way rf frequency synthesizers.

The maritime wireless communication system with good transmission effect processes voice information by the integration module when in use, performs high-frequency component emphasis on the voice information signal to ensure the high-frequency signal-to-noise ratio of the information, then performs further pre/de-emphasis on the information to be transmitted by the main control MCU and converts the digital signal, performs modulation and demodulation of a corresponding format on the digital voice signal, amplifies the signal by the power amplifier module and transmits the signal to the R/T module, and the R/T module transmits the signal to the outside by the external antenna.

The foregoing shows and describes the general principles, essential features, and advantages of the utility model. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a maritime affairs wireless communication system that transmission effect is good which characterized in that: including master control MCU, AIS route and VHF passageway, master control MCU both way junction have the AIS route with the VHF passageway, the AIS route with the VHF passageway is connected, the AIS route includes T/R module, LNA module, superheterodyne receiving module, two points mediation power amplifier modules, the VHF passageway includes T/R module, LNA module, power amplifier module, frequency phase-locked loop, receives radio frequency front end, integration module.

2. The maritime wireless communication system with good transmission effect according to claim 1, wherein: the superheterodyne receiving module of the AIS channel is connected with the two point tones, the two point tones are connected with the power amplifier module, the power amplifier module is connected with the T/R module, and two ends of the LNA module are connected with the superheterodyne receiving module and the T/R module.

3. The maritime wireless communication system with good transmission effect according to claim 1, wherein: the frequency phase-locked loop of VHF passageway is connected with receive the radio frequency front end, T/R module both ends are connected with the LNA module, the LNA module is connected with receive the radio frequency front end, receive the radio frequency front end and be connected with the integration module, the integration module is connected with receive the radio frequency front end, receive the radio frequency front end and be connected with the power amplifier module, the power amplifier module is connected with T/R module.

4. The maritime wireless communication system with good transmission effect according to claim 1, wherein: the master control MCU is bidirectionally connected with the superheterodyne receiving module, the frequency phase-locked loop and the integration module, and the two-point modulation is bidirectionally connected with the frequency phase-locked loop.

5. The maritime wireless communication system with good transmission effect according to claim 1, wherein: the VHF passageway the LNA module adopts the DSC route, the VHF passageway the power amplifier module adopts the VHF route.

6. The maritime wireless communication system with good transmission effect according to claim 1, wherein: the integration module comprises VHF voice/Scramble and DTMF/NWR/NOAA DSC/ATTS.