CN202374403U - Short-wave channel digital interphone - Google Patents
Short-wave channel digital interphone Download PDFInfo
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- CN202374403U CN202374403U CN2011205369758U CN201120536975U CN202374403U CN 202374403 U CN202374403 U CN 202374403U CN 2011205369758 U CN2011205369758 U CN 2011205369758U CN 201120536975 U CN201120536975 U CN 201120536975U CN 202374403 U CN202374403 U CN 202374403U
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- 230000003321 amplification Effects 0.000 claims abstract description 13
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 13
- 230000010355 oscillation Effects 0.000 claims description 7
- 238000005516 engineering process Methods 0.000 abstract description 10
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Abstract
The utility model relates to a short-wave channel digital interphone. An advanced RISC machine (ARM) processor circuit is respectively connected with a digital/analog baseband processing unit, an audio circuit, a global positioning system (GPS) receiving module, a keyboard and a display part; the digital/analog baseband processing unit is respectively connected with the audio circuit, a voice receiving circuit, a signaling receiving circuit and a voice and signaling emission circuit; an antenna switch is connected with a low noise amplifier (LNA); the LNA is connected to the voice receiving circuit and the signaling receiving circuit through a frequency mixing circuit; the voice and signaling emission circuit is connected to a radio frequency power amplification circuit through the frequency mixing circuit; and the radio frequency power amplification circuit is connected with the antenna switch. The short-wave channel digital interphone has the advantages that the digital interphone with a short wave band is added, so that a user can select different digital technologies according to different use conditions, environments and demands; and the short-wave channel digital interphone has practicability and popularization value.
Description
Technical field
The utility model relates to the HF Wireless Communication apparatus field, particularly a kind of short wave channel digital handset.
Background technology
Along with the maturation of intercom digitizing technique, DMR, digital handset technology such as dPMR have obtained extensive use; But be still blank in the market for the exploitation of the digital handset of short-wave band; Still do not have producer the digital handset of this frequency range is researched and developed, in order to adapt to this trend, therefore; Proprietary technology is researched and developed and formed to this technology, the present technique field is had practicality and promotional value.
Summary of the invention
The purpose of the utility model is exactly to be the needs according to prior art; Development problem to the digital handset of short-wave band; A kind of short wave channel digital handset is provided; So that make the increase of intercom digitizing technique be used for the digital handset of short-wave band, make the user select different digital technology forms according to different service conditions, environment and needs.
The utility model is to realize through such technical scheme; The short wave channel digital handset; Comprise main circuit, it is characterized in that main circuit is mainly by arm processor, GPS receiver module, digital-to-analog baseband processing unit, voicefrequency circuit, voice receiving circuit, signal receiving circuit, voice and signaling radiating circuit, low noise amplifier (LNA); Local oscillation circuit, mixting circuit, RF power amplification circuit, keyboard and display part constitute
The arm processor circuit connects numeral/ABB processing unit, voicefrequency circuit, GPS receiver module, keyboard and display part respectively;
The digital-to-analog baseband processing unit, connect voicefrequency circuit, voice receiving circuit, signal receiving circuit, voice and signaling radiating circuit respectively;
Duplexer connects low noise amplifier (LNA), and low noise amplifier (LNA) is connected to voice receiving circuit and signal receiving circuit through mixting circuit;
Voice and signaling radiating circuit are connected to the RF power amplification circuit through mixting circuit, and the RF power amplification circuit connects duplexer;
Local oscillation circuit is connected with mixting circuit;
The utility model has the advantages that: increased the digital handset that is used for short-wave band; Make the user select different digital technology forms according to different service conditions, environment and needs, the digital handset of shortwave frequency range (27.5-39.5MHz) has group calling; Individual exhaling; Functions such as short message have realized digital intercommunication function in the shortwave frequency range, have realized the 4FSK modulation of short-wave band and the high power digital power amplifier technology of short-wave band; Adopt dPMR numeral intercommunication standard, have practicality and promotional value.
Description of drawings
Fig. 1 is a short wave channel digital handset structured flowchart.
Embodiment
Understand the utility model for clearer, describe in detail in conjunction with accompanying drawing and embodiment:
As shown in Figure 1; Main circuit is mainly by arm processor, GPS receiver module, digital-to-analog baseband processing unit, voicefrequency circuit, voice receiving circuit, signal receiving circuit, voice and signaling radiating circuit, low noise amplifier (LNA); Local oscillation circuit, mixting circuit, RF power amplification circuit, keyboard and display part constitute
The arm processor circuit connects numeral/ABB processing unit, voicefrequency circuit, GPS receiver module, keyboard and display part respectively;
The digital-to-analog baseband processing unit, connect voicefrequency circuit, voice receiving circuit, signal receiving circuit, voice and signaling radiating circuit respectively;
Duplexer connects low noise amplifier (LNA), and low noise amplifier (LNA) is connected to voice receiving circuit and signal receiving circuit through mixting circuit;
Voice and signaling radiating circuit are connected to the RF power amplification circuit through mixting circuit, and the RF power amplification circuit connects duplexer;
Local oscillation circuit is connected with mixting circuit;
When the short wave channel digital handset receives signal, receive call signal from antenna after, call signal is sent into low noise amplifier (LNA) amplifies; Carry out mixing through mixting circuit and intermediate-freuqncy signal then, mixed frequency signal is sent into the digital-to-analog baseband processing unit through voice receiving circuit or signal receiving circuit and is carried out demodulation, be demodulated into analog baseband signal after; Carry out the 4FSK demodulation by the digital-to-analog baseband processing unit again; Carry out analyzing and processing by arm processor then, if digital signalling then carries out signaling process, if voice signal; Then carry out the voice signal decoding, voice signal is delivered to loud speaker;
When the short wave channel digital handset is desired to call out; The voice signal of receiving transmitter is delivered to the phonetic vocoder of voicefrequency circuit and encoded, control the coding of signaling simultaneously, the signal behind the coding is sent into the digital-to-analog baseband processing unit be modulated to digital baseband signal; Be modulated to analog baseband signal by the digital-to-analog baseband processing unit again; Send into the rf modulations unit then and modulate, carry out obtaining shortwave after the mixing with local oscillation signal again and transmit, through predrive; Send into the RF power amplification circuit and carry out power amplification, launch through antenna at last.
The digital handset of shortwave frequency range (27.5-39.5MHz) has group calling, individual exhaling; Functions such as short message; Realize digital intercommunication function in the shortwave frequency range, realized the 4FSK modulation of short-wave band and the high power digital power amplifier technology of short-wave band: adopt dPMR numeral intercommunication standard.
According to above-mentioned explanation, can realize the scheme of the utility model in conjunction with art technology.
Claims (1)
1. short wave channel digital handset; Comprise main circuit; It is characterized in that; Main circuit is mainly by arm processor, GPS receiver module, digital-to-analog baseband processing unit, voicefrequency circuit, voice receiving circuit, signal receiving circuit, voice and signaling radiating circuit, low noise amplifier; Local oscillation circuit, mixting circuit, RF power amplification circuit, keyboard and display part constitute, and the arm processor circuit connects numeral/ABB processing unit, voicefrequency circuit, GPS receiver module, keyboard and display part respectively; The digital-to-analog baseband processing unit, connect voicefrequency circuit, voice receiving circuit, signal receiving circuit, voice and signaling radiating circuit respectively; Duplexer connects low noise amplifier, and low noise amplifier is connected to voice receiving circuit and signal receiving circuit through mixting circuit; Voice and signaling radiating circuit are connected to the RF power amplification circuit through mixting circuit, and the RF power amplification circuit connects duplexer; Local oscillation circuit is connected with mixting circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205369758U CN202374403U (en) | 2011-12-20 | 2011-12-20 | Short-wave channel digital interphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205369758U CN202374403U (en) | 2011-12-20 | 2011-12-20 | Short-wave channel digital interphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202374403U true CN202374403U (en) | 2012-08-08 |
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ID=46598090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205369758U Expired - Lifetime CN202374403U (en) | 2011-12-20 | 2011-12-20 | Short-wave channel digital interphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202374403U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110191420A (en) * | 2019-05-15 | 2019-08-30 | 成都贝亚特科技有限公司 | A kind of anti-interference wireless intercom system and installation method |
| CN110504985A (en) * | 2019-09-24 | 2019-11-26 | 天津七一二通信广播股份有限公司 | A kind of train dispatch radio communication channel machine equipment and implementation method with digitized audio interface |
-
2011
- 2011-12-20 CN CN2011205369758U patent/CN202374403U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110191420A (en) * | 2019-05-15 | 2019-08-30 | 成都贝亚特科技有限公司 | A kind of anti-interference wireless intercom system and installation method |
| CN110191420B (en) * | 2019-05-15 | 2021-01-15 | 成都贝亚特科技有限公司 | Anti-interference wireless intercom system and installation method |
| CN110504985A (en) * | 2019-09-24 | 2019-11-26 | 天津七一二通信广播股份有限公司 | A kind of train dispatch radio communication channel machine equipment and implementation method with digitized audio interface |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 300462 Binhai New Area, Tianjin economic and Technological Development Zone, North Street, No. 141 Patentee after: Tianjin 712 Communications Broadcasting Limited by Share Ltd Address before: 300140 Hebei District new road, Tianjin, No. 185 Patentee before: Tianjin 712 Communication Broadcast Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120808 |