CN208241663U - A kind of shortwave frequency hopping digital transmission communication system - Google Patents

Abstract

The utility model discloses a short-wave frequency hopping digital transmission communication system, which comprises: a communication processing unit, a sideband modulation module, a local oscillator, a first frequency mixing module, a power amplifier module, an antenna tuner, an antenna, a low noise amplifier module, a second mixer a frequency module and a demodulator, and the communication processing unit includes a DSP chip, a digital-to-analog converter and an analog-to-digital converter. Through the above method, the utility model shortwave frequency hopping digital transmission communication system increases the frequency hopping communication function without changing the radio frequency and structure of the existing shortwave radio station, and enhances the anti-interference performance, anti-intercept and anti-multipath performance and networking performance, and has broad market prospects in the popularization of shortwave frequency hopping digital transmission communication systems.

Description

A kind of shortwave frequency hopping digital transmission communication system

Technical field

The utility model relates to the communications fields, more particularly to a kind of shortwave frequency hopping digital transmission communication system.

Background technique

The working frequency in short wave communication radio station is between 2MHz-30MHz, is a kind of important means of military communication.Tradition Frequency hopping radio set be work will to be jumped on modulates information to carrier wave, have very strong anti-interference, anti-intercepting and capturing anti-multipath and networking Ability.Since factors, the communication reliabilities such as the channel of shortwave frequency range is crowded, multipath effect and decline are substantially reduced.In addition shortwave The narrow bandwidth of frequency hopping communications equipment changes frequency tuned speed relatively slowly (generally several milliseconds), so that frequency hopping communications is in short-wave band Using being restricted.

Utility model content

The utility model is mainly solving the technical problems that provide a kind of shortwave frequency hopping digital transmission communication system, by not changing In the case where cashing the radio frequency and framework that have short-wave radio set, it is multiplexed the radio frequency and channel strip of existing short-wave radio set, increases by one Independent communications processor element realizes frequency hopping communications function, enhances interference free performance, anti-intercepting and capturing anti-multipath performance and group Net performance has extensive market prospects in popularizing for shortwave frequency hopping digital transmission communication system.

In order to solve the above technical problems, the utility model provides a kind of shortwave frequency hopping digital transmission communication system, comprising: mailing address Manage unit, sideband modulation module, local oscillator, the first frequency mixing module, power amplifier module, day tune, antenna, low noise amplification module, the second mixing Module, demodulator, the communications processor element include dsp chip, digital analog converter and analog-digital converter, the external letter of DSP Source receives original signal and up-conversion, and the DSP communicates to connect the digital analog converter and original signal is converted to analog signal, The digital analog converter communicates to connect the sideband modulation module and is modulated to analog signal, the sideband modulation module communication It connects first frequency mixing module and analog signal is sent to first frequency mixing module, the dsp chip passes through the local oscillator It communicates to connect first frequency mixing module original signal is sent to first frequency mixing module and carry out being mixed shape with analog signal At the first mixed frequency signal, first frequency mixing module communicates to connect the power amplifier module according to this, the day reconciles the antenna will First mixed frequency signal is launched, and the antenna receives signal, and the antenna passes through described in low noise amplification module communication connection The signal received is sent to second frequency mixing module by the second frequency mixing module, and the dsp chip passes through described vibration communication It connects second frequency mixing module original signal is sent to second frequency mixing module and carry out being mixed shape with the signal received At the second mixed frequency signal, second frequency mixing module communicates to connect the demodulator and the second mixed frequency signal is sent to the demodulation Device carries out demodulation and forms demodulated signal, and the demodulator communicates to connect the analog-digital converter and demodulated signal is sent to the mould Number converter carries out analog-to-digital conversion and forms digital signal, and the analog-digital converter communicates to connect the dsp chip and down coversion obtains Baseband signal is obtained, baseband signal is sent to the stay of two nights by the external stay of two nights of dsp chip.

In one preferred embodiment of the utility model, the dsp chip is by the signal frequency after original signal up-conversion For 1.8kHz.

The beneficial effects of the utility model are: the utility model shortwave frequency hopping digital transmission communication system by do not change it is existing In the case where the radio frequency and framework of short-wave radio set, it is multiplexed the radio frequency and channel strip of existing short-wave radio set, increase by one is independent Communications processor element realizes frequency hopping communications function, enhances interference free performance, anti-intercepting and capturing anti-multipath performance and networking Can, there are extensive market prospects in popularizing for shortwave frequency hopping digital transmission communication system.

Detailed description of the invention

It, below will be to required in embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model Attached drawing to be used is briefly described, it should be apparent that, the accompanying drawings in the following description is only some realities of the utility model Example is applied, it for those of ordinary skill in the art, without creative efforts, can also be according to these attached drawings Obtain other attached drawings, in which:

Fig. 1 is the structural schematic diagram of one preferred embodiment of shortwave frequency hopping digital transmission communication system of the utility model.

Specific embodiment

Below by the technical scheme in the utility model embodiment is clearly and completely described, it is clear that described Embodiment is only a part of the embodiment of the utility model, instead of all the embodiments.Based on the implementation in the utility model Example, all other embodiment obtained by those of ordinary skill in the art without making creative efforts belong to The range of the utility model protection.

Referring to Fig. 1, the utility model embodiment includes:

A kind of shortwave frequency hopping digital transmission communication system, comprising: communications processor element, sideband modulation module, local oscillator, the first mixing Module, power amplifier module, day tune, antenna, low noise amplification module, the second frequency mixing module, demodulator, the communications processor element include Dsp chip, digital analog converter and analog-digital converter.

When transmission, the external signal source receiving original signal of the DSP simultaneously carries out signal processing, mainly include channel coding plus Disturb, interweave, modulating and etc., then up-conversion to 1.8kHz, is equivalent to and is modulated to 1.8KHz on carrier wave, the DSP communication It connects the digital analog converter and original signal is converted into analog signal, be similar to audio, the digital analog converter communication connection The sideband modulation module is modulated analog signal, and the sideband modulation module communicates to connect first frequency mixing module will Analog signal is sent to first frequency mixing module, and the dsp chip communicates to connect the first mixing mould by the local oscillator Original signal is sent to first frequency mixing module and analog signal and be mixed by block forms the first mixed frequency signal, and described first Frequency mixing module communicates to connect the power amplifier module according to this, the day reconciliation antenna launches the first mixed frequency signal, together When, dsp chip realizes that frequency is jumped by controlling the local oscillator of up-conversion according to currently transmitted data type and frequency hopping pattern Become；

When reception, the antenna receives signal, and dsp chip receives signal by control local oscillator according to frequency hopping pattern, described Antenna, which by the low noise amplification module communicates to connect second frequency mixing module signal received is sent to described second, to be mixed Frequency module, the dsp chip communicate to connect second frequency mixing module by the local oscillator and original signal are sent to described the Two frequency mixing modules, which carry out being mixed with the signal received, forms the second mixed frequency signal, described in the second frequency mixing module communication connection Demodulator by the second mixed frequency signal be sent to the demodulator carry out demodulation form demodulated signal, the signal after demodulation be carrier frequency Rate is the audio signal of 1.8KHz, and the demodulator communicates to connect the analog-digital converter and demodulated signal is sent to the modulus Converter carries out analog-to-digital conversion and forms digital signal, and the analog-digital converter communicates to connect the dsp chip and down coversion obtains Baseband signal is sent to the stay of two nights by baseband signal, the external stay of two nights of dsp chip.

Preferably, the signal frequency after original signal up-conversion is 1.8kHz by the dsp chip.

The beneficial effect of the utility model shortwave frequency hopping digital transmission communication system is:

By in the case where not changing the radio frequency and framework of existing short-wave radio set, be multiplexed the radio frequency of existing short-wave radio set with Channel strip increases an independent communications processor element, realizes frequency hopping communications function, enhances interference free performance, anti-section Obtain anti-multipath performance and networking performance.

The above description is only the embodiments of the present invention, and therefore it does not limit the scope of the patent of the utility model, all Using equivalent structure or equivalent flow shift made by the utility model description, it is applied directly or indirectly in other phases The technical field of pass, is also included in the patent protection scope of the utility model.

Claims (2)

1. A shortwave frequency hopping data transmission communication system is characterized in that, comprising: a communication processing unit, a sideband modulation module, a local oscillator, a first frequency mixing module, a power amplifier module, an antenna tuner, an antenna, a low noise amplifier module, a second Mixing module and demodulator, the communication processing unit includes a DSP chip, a digital-to-analog converter and an analog-to-digital converter, the external source of the DSP receives the original signal and up-converts the frequency, and the DSP communicates with the digital-to-analog converter The converter converts the original signal into an analog signal, the digital-to-analog converter communicates with the sideband modulation module to modulate the analog signal, and the sideband modulation module communicates with the first mixing module to transmit the analog signal to the The first mixing module, the DSP chip is connected to the first mixing module through the local oscillator communication to transmit the original signal to the first mixing module to mix with the analog signal to form a first mixing signal, The first frequency mixing module communicates with the power amplifier module, the tuner and the antenna to transmit the first frequency mixing signal, the antenna receives the signal, and the antenna communicates with the low noise amplifier module The second mixing module transmits the received signal to the second mixing module, and the DSP chip communicates with the second mixing module through the local oscillator to transmit the original signal to the second mixing module. The frequency module mixes the received signal to form a second mixed frequency signal, and the second mixed frequency module communicates with the demodulator to transmit the second mixed frequency signal to the demodulator for demodulation to form a demodulated signal signal, the demodulator communicates with the analog-to-digital converter and transmits the demodulated signal to the analog-to-digital converter for analog-to-digital conversion to form a digital signal, and the analog-to-digital converter communicates with the DSP chip and down-converts A baseband signal is obtained, and the DSP chip is externally connected to a sink to transmit the baseband signal to the sink. 2. The shortwave frequency hopping digital transmission communication system according to claim 1, wherein the DSP chip converts the original signal to a frequency of 1.8kHz.