CN208299794U - A kind of real-time voice encryption transmission system based on LoRa chip - Google Patents
A kind of real-time voice encryption transmission system based on LoRa chip Download PDFInfo
- Publication number
- CN208299794U CN208299794U CN201820873693.9U CN201820873693U CN208299794U CN 208299794 U CN208299794 U CN 208299794U CN 201820873693 U CN201820873693 U CN 201820873693U CN 208299794 U CN208299794 U CN 208299794U
- Authority
- CN
- China
- Prior art keywords
- module
- lora
- chip
- real
- transmission system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
A kind of real-time voice encryption transmission system based on LoRa chip, including signal acquisition and digital processing module, LoRa module and power amplifier/filter module；The signal acquisition and digital processing module, the LoRa module and the power amplifier/filter module are sequentially connected electrically；The signal acquisition and digital processing module are electrically connected with electrophone, and the power amplifier/filter module is electrically connected with antenna.The beneficial effect of the application is: using the anti-interference ability of LoRa chip, so that voice communication has many advantages, such as anti-interference, anti-intercepting and capturing, secrecy, remote.
Description
Technical field
The application belongs to voice communication technology field, adds specifically, being related to a kind of real-time voice based on LoRa chip
Close Transmission system.
Background technique
Wireless voice communication have many advantages, such as it is easy to use, flexible, do not limited by geographical environment, without being laid with cable, but
Electromagnetic space be it is open, information is easy to be obtained by other people or interference, how to carry out reliable, secret communication and shows in many occasions
It obtains particularly important.
Summary of the invention
In view of this, the technical problem to be solved by the application is to provide a kind of real-time voices based on LoRa chip to add
Close Transmission system can utilize the anti-interference ability of LoRa chip, so that voice communication has anti-interference, anti-intercepting and capturing, secrecy, remote
Apart from the advantages that.
In order to solve the above-mentioned technical problem, this application discloses a kind of real-time voice encrypted transmission system based on LoRa chip
System, and realized using following technical scheme.
A kind of real-time voice encryption transmission system based on LoRa chip, including signal acquisition and digital processing module,
LoRa module and power amplifier/filter module；The signal acquisition and digital processing module, the LoRa module and the function
Put/filter module is sequentially connected electrically；The signal acquisition and digital processing module are electrically connected with electrophone, the power amplifier/filter
Wave module is electrically connected with antenna.
Further, the LoRa module includes SX1276 chip.
Further, the signal acquisition and digital processing module include pcm encoder module, decompression module and FPGA mould
Block；The pcm encoder module, the decompression module and the FPGA module are sequentially connected electrically.
Further, the coding chip of the pcm encoder module is MC14LC5540.
Further, the decompression shrinking chip of the decompression module is AMBE2000.
Further, the FPGA module includes FIFO buffer module, encrypting module and framing module；The FIFO
Buffer module, the encrypting module and the framing module are sequentially connected electrically.
Further, the real-time voice encryption transmission system based on LoRa chip, further includes power module；The electricity
Source module is electrically connected with the signal acquisition and digital processing module, the LoRa module and the power amplifier/filter module respectively
It connects.
Compared with prior art, the application can be obtained including following technical effect: use the linear frequency modulation based on LoRa
Spread spectrum and encryption technology realize secret communication, so that voice communication has anti-interference, anti-intercepting and capturing, secrecy, remote etc. excellent
Point has stronger practical application value.
Certainly, implement any product of the application it is not absolutely required to and meanwhile reach all the above technical effect.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present application, constitutes part of this application, this Shen
Illustrative embodiments and their description please are not constituted an undue limitation on the present application for explaining the application.In the accompanying drawings:
Fig. 1 is the real-time voice encryption transmission system hardware structure diagram of the application one embodiment.
Fig. 2 is the signal acquisition and digital processing module principle block diagram of the application one embodiment.
Fig. 3 is the FPGA processing partial schematic block diagram of the application one embodiment.
Specific embodiment
Presently filed embodiment is described in detail below in conjunction with accompanying drawings and embodiments, how the application is applied whereby
Technological means solves technical problem and reaches the realization process of technical effect to fully understand and implement.
The real-time voice encryption transmission system of the utility model, using LoRa and digital-scrambling techniques, wherein LoRa is based on
A kind of spread spectrum, has strong anti-interference ability, and since electromagnetic signal peak power is low, concealment is strong, is not easy to be trapped.
LoRa technology also efficiently solves multipath fading and Doppler frequency shift common in wireless communication, and is improved with orthogonal spreading sequence
Channel capacity.Since LoRa chip transmission of data rate is low, delay is big, it is chiefly used in the not high small information of requirement of real-time at present
Measure data transmission.LoRa module is designed based on the SX1276 chip of Sheng Te company, and addition is some normal for SX1276 chip
The peripheral circuit of work, so as to the realization of its function.
After the analysis and test to LoRa chip, the voice transfer occasion high in real-time is applied, conjunction is passed through
The information source data of reason is handled, and has reached ideal speech laser propagation effect.Analogue voice signal is digitized first
Pcm encoder is carrying out AMBE compressed encoding to it, 2.4kbps low rate digitized speech information is being obtained, finally by LoRa mould
Block realizes data wireless transmission, and by practical field testing, in the environment of unobstructed and co-channel interference, communication distance is reachable
10Km or more.
System hardware constitutes block diagram as shown in Figure 1, the real-time voice encryption transmission system based on LoRa chip includes signal
Acquisition and digital processing module, LoRa module, power amplifier/filter module and power module, totally four is most of.Power module input
End is electrically connected with external power supply, and output end is electrically connected with other three big modules of system, is powered for whole system.Signal acquisition and
Digital processing module, LoRa module, power amplifier/filter module are sequentially connected electrically, wherein signal acquisition and digital processing module with give
Receiver electrical connection, power amplifier/filter module are electrically connected with antenna.
The transmission of voice is divided into transmission process and receive process.
When transmission process, the input terminal of signal acquisition and digital processing module is electrically connected with external transmitter, for acquiring
Voice simultaneously carries out digitized processing to collected voice.Signal acquisition and digital processing module receive original analog voice,
After the processing such as being filtered, amplifying to it, pcm encoder, compressed encoding are carried out to amplified analog voice information, obtain low speed
Digitized voice data, then Digital Signal Processing is carried out to the data, by treated, base band data to be modulated issue LoRa mould
Block.The output end of signal acquisition and digital processing module is electrically connected with the input terminal of LoRa module, by the language after digitized processing
Sound signal carry out after baseband modulation, digital-to-analogue conversion, superhet up-conversion, filtering, the processing such as amplification by radiofrequency signal give power amplifier/
Filter module.The output end of LoRa module is electrically connected with power amplifier/filter module input terminal, will further be located by LoRa module
The small signal speech managed is transported to power amplifier/filter module and is amplified and filtered, then by with power amplifier/filter module
Electromagnetic signal is radiated in the air by the antenna of output end electrical connection.
Receive process and transmission process circuit connection sequence and exactly the opposite, the circuit connection angle to the processing sequence of signal
Degree, signal acquisition and digital processing module, LoRa module, power amplifier/filter module and power module input terminal become exporting
End, output end become input terminal；Signal converts angle, needs for electromagnetic signal to be ultimately converted to analog voice signal for receiving end
It listens to.Receive process specifically: spatial electromagnetic signal is received and converted to electric signal by antenna；LoRa module is entered back into, into
After row amplification, filtering, the processing such as superhet down coversion, analog-to-digital conversion, base band demodulating, will demodulate data transmission to signal acquisition with
Digital processing module, after carrying out the processing such as interface data grouping and speed conversion, frame decoding, decryption；Again by digitized speech information
Analog voice signal is converted to, after the processing such as filtering, amplification, external receiver is driven to realize that voice restores.
As shown in Fig. 2, signal acquisition and digital processing module include pcm encoder module, decompression module and FPGA module,
Pcm encoder module, decompression module and FPGA module are sequentially connected electrically.Pcm encoder module select coding chip be
MC14LC5540 for the digital signal of 64Kbps or can receive analog voice signal code conversion in transmission process
The digital signal of 64Kbps is converted into analog voice signal in the process.Decompression module select decompression shrinking chip be
AMBE2000 can compress the digital signal after pcm encoder in transmission process, and obtaining rate is the low of 2.4kbps
Speed digital voice data, or believe the number that low-speed digital voice data decompression shortens 64Kbps into receive process
Number.FPGA, which can carry out the numbers such as framing, encryption, interface data grouping and speed conversion to digital signal in transmission process, to be believed
Number processing, opposite treatment process can be also carried out in receive process.
The functional block diagram that FPGA handles data is as shown in figure 3, include FIFO buffer module, encrypting module, group
Frame module is respectively intended to carry out the signal processing of interface data grouping and speed conversion, encryption and framing, final to realize
The conversion of AMBE format compression data and serial data.In addition FPGA can be used as the control of whole system with its excellent performance
System, Consultation Center, are the core chipss at voice source end.
The beneficial effect of the application is: using linear frequency modulation spread spectrum technology and digital-scrambling techniques based on LoRa to realize and protects
Close communication has stronger practical application valence so that voice communication has many advantages, such as anti-interference, anti-intercepting and capturing, secrecy, remote
Value.
Above to a kind of real-time voice encryption transmission system based on LoRa chip provided by the embodiment of the present application, carry out
It is discussed in detail.The description of the example is only used to help understand the method for the present application and its core ideas；Meanwhile for
Those of ordinary skill in the art have change according to the thought of the application in specific embodiments and applications
Place, in conclusion the contents of this specification should not be construed as limiting the present application.
Some vocabulary has such as been used to censure specific components in specification and claims.Those skilled in the art
, it is to be appreciated that hardware manufacturer may call the same component with different nouns.Present specification and claims are not
In such a way that the difference of title is as component is distinguished, but with the difference of component functionally as the criterion of differentiation.Such as
Be an open language in "comprising" of the specification and claims in the whole text mentioned in, thus should be construed to " include but not
It is defined in "." substantially " refer within the acceptable error range, those skilled in the art can solve within a certain error range
The technical problem basically reaches the technical effect.Specification subsequent descriptions are to implement the better embodiment of the application, so
The description is being not intended to limit the scope of the present application for the purpose of the rule for illustrating the application.The protection of the application
Range is subject to view the appended claims institute defender.
It should also be noted that, the terms "include", "comprise" or its any other variant are intended to nonexcludability
Include, so that commodity or system including a series of elements not only include those elements, but also including not clear
The other element listed, or further include for this commodity or the intrinsic element of system.In the feelings not limited more
Under condition, the element that is limited by sentence "including a ...", it is not excluded that in the commodity or system for including the element also
There are other identical elements.
Above description shows and describes several preferred embodiments of the present application, but as previously described, it should be understood that the application
Be not limited to forms disclosed herein, should not be regarded as an exclusion of other examples, and can be used for various other combinations,
Modification and environment, and the above teachings or related fields of technology or knowledge can be passed through in application contemplated scope described herein
It is modified.And changes and modifications made by those skilled in the art do not depart from spirit and scope, then it all should be in this Shen
It please be in the protection scope of the appended claims.
Claims (7)
1. a kind of real-time voice encryption transmission system based on LoRa chip, it is characterised in that: at signal acquisition and number
Manage module, LoRa module and power amplifier/filter module；The signal acquisition and digital processing module, the LoRa module and
Power amplifier/the filter module is sequentially connected electrically；The signal acquisition and digital processing module are electrically connected with electrophone, the function
Put/filter module is electrically connected with antenna.
2. according to claim 1 based on the real-time voice encryption transmission system of LoRa chip, it is characterised in that: the LoRa
Module includes SX1276 chip.
3. the real-time voice encryption transmission system according to claim 1 or claim 2 based on LoRa chip, it is characterised in that: described
Signal acquisition and digital processing module include pcm encoder module, decompression module and FPGA module；The pcm encoder module, institute
It states decompression module and the FPGA module is sequentially connected electrically.
4. according to claim 3 based on the real-time voice encryption transmission system of LoRa chip, it is characterised in that: the PCM
The coding chip of coding module is MC14LC5540.
5. according to claim 3 based on the real-time voice encryption transmission system of LoRa chip, it is characterised in that: the decompression
The decompression shrinking chip of contracting module is AMBE2000.
6. according to claim 3 based on the real-time voice encryption transmission system of LoRa chip, it is characterised in that: the FPGA
Module includes FIFO buffer module, encrypting module and framing module；The FIFO buffer module, the encrypting module and institute
Framing module is stated to be sequentially connected electrically.
7. -2, any real-time voice encryption transmission system based on LoRa chip of 4-6, feature exist according to claim 1
In: it further include power module；The power module respectively with the signal acquisition and digital processing module, the LoRa module with
And the power amplifier/filter module electrical connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820873693.9U CN208299794U (en) | 2018-06-07 | 2018-06-07 | A kind of real-time voice encryption transmission system based on LoRa chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820873693.9U CN208299794U (en) | 2018-06-07 | 2018-06-07 | A kind of real-time voice encryption transmission system based on LoRa chip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208299794U true CN208299794U (en) | 2018-12-28 |
Family
ID=64723945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820873693.9U Active CN208299794U (en) | 2018-06-07 | 2018-06-07 | A kind of real-time voice encryption transmission system based on LoRa chip |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208299794U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109561397A (en) * | 2018-12-29 | 2019-04-02 | 苏州英诺迅科技股份有限公司 | A kind of remote-wireless voice-transmission system based on LoRa technology |
| CN112383317A (en) * | 2020-11-26 | 2021-02-19 | 西安烽火电子科技有限责任公司 | Voice communication system based on DSP and LORA wireless module |
-
2018
- 2018-06-07 CN CN201820873693.9U patent/CN208299794U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109561397A (en) * | 2018-12-29 | 2019-04-02 | 苏州英诺迅科技股份有限公司 | A kind of remote-wireless voice-transmission system based on LoRa technology |
| CN112383317A (en) * | 2020-11-26 | 2021-02-19 | 西安烽火电子科技有限责任公司 | Voice communication system based on DSP and LORA wireless module |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208299794U (en) | A kind of real-time voice encryption transmission system based on LoRa chip | |
| CN109845118A (en) | A kind of tower top device and passive intermodulation removing method | |
| CN203608193U (en) | Hand-held short-wave radio station based on radio frequency digitalization | |
| CN106877828B (en) | Transformer quadrature synthesis power amplifier | |
| CN101931424A (en) | Short-wave radio frequency digital processing module | |
| CN108702351A (en) | Signal processing framework for transmitter | |
| CN203445892U (en) | Signal shielding device suitable for multiple communication networks | |
| US8290087B2 (en) | Sample rate conversion in delta-sigma modulators | |
| CN105227511B (en) | A kind of microwave and millimeter wave signal of communication method for generation based on frequency multiplication mode | |
| CN106506029A (en) | A kind of u piece of digital wireless audio transmission system and its transmission method | |
| CN206506712U (en) | A kind of band signal processor of police digital clustering communication system | |
| CN105472544B (en) | A kind of wireless discrete narrow band spectrum aggregating CPE terminal for supporting wifi to access | |
| CN201533308U (en) | Medium-long wave digital spread-spectrum communication apparatus | |
| CN107294546B (en) | Radio frequency link and its working method in a kind of digital pre-distortion system | |
| CN201528429U (en) | Mobile terminal and server for processing its data | |
| US7839214B2 (en) | Signal nonlinear distoration magnitude detection method and device | |
| CN204614445U (en) | A kind of subsonics identification compact system | |
| Prata et al. | All-digital transceivers—Recent advances and trends | |
| CN202713290U (en) | Audio transmission chip and portable device with same | |
| CN206481310U (en) | A kind of underwater sound number passes device | |
| CN107423648B (en) | RFID reader capable of improving forward anti-interference function | |
| CN206596180U (en) | A kind of headset | |
| CN205945755U (en) | Supersound communication decoding circuit and electromagnetic heating equipment | |
| CN209748551U (en) | Full frequency channel terminal acquisition device | |
| Izumi et al. | Comparison between quadrature-and polar-modulation switching-mode transmitter with pulse-density modulation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |