CN204046592U - High power capacity wideband digital intercom - Google Patents
High power capacity wideband digital intercom Download PDFInfo
- Publication number
- CN204046592U CN204046592U CN201420328480.XU CN201420328480U CN204046592U CN 204046592 U CN204046592 U CN 204046592U CN 201420328480 U CN201420328480 U CN 201420328480U CN 204046592 U CN204046592 U CN 204046592U
- Authority
- CN
- China
- Prior art keywords
- radio
- frequency
- transformer
- acoustic wave
- surface acoustic
- 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.)
- Expired - Fee Related
Links
Landscapes
- Transceivers (AREA)
Abstract
The utility model discloses a kind of high power capacity wideband digital intercom, earphone and microphone are connected with processor with audio coder & decoder (codec) by phonetic entry pio chip successively, and processor becomes device by radio-frequency receiving-transmitting victory and is connected radio-frequency antenna with radio-frequency front-end.Transmitting path comprise connect in turn the first transformer, the first Surface Acoustic Wave Filter SAW1, automatically controlled rapid adjustment attenuator ATT, the first power amplifier PA1, fixed attenuator, the second power amplifier PA2 and coupler, receiving path comprises the low noise amplifier LNA, the second Surface Acoustic Wave Filter SAW2 and the second transformer that connect in turn.The utility model adopts OFDM modulation pattern, and can reduce to a great extent and decline because blocking the signal quality caused, the information capacity simultaneously can transmitted promotes greatly; Adopt the low noise amplifier that noise factor is low, ensure that higher receiving sensitivity; Adopt the high Surface Acoustic Wave Filter suppressed, strong suppression can be carried out to the interference signal outside band, ensure the quality of Received signal strength.
Description
Technical field
The utility model relates to digital handset field, particularly relates to a kind of high power capacity wideband digital intercom.
Background technology
Intercom (Two Way Radio) is a kind of bidirectional mobile communication instrument, is applicable to relatively fix and the occasion of frequent call.At present, traditional intercom is analog-interphone, and its theory diagram as shown in Figure 1.Although this kind of intercom cost is lower, function is simple, cannot stress release treatment, and signal is easily blocked by obstructions, and speech quality is poor, and the amount of information of transmission is few.Meanwhile, with maximum power transmission, power consumption can only be added on the one hand, on the other hand in some occasion, interference can be caused to other receiver, be unfavorable for the long-term popularization of product.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, provides the high power capacity wideband digital intercom that a kind of receiving sensitivity is high, received signal quality is high, energy-conservation, antijamming capability is strong.
The purpose of this utility model is achieved through the following technical solutions: high power capacity wideband digital intercom, it comprises earphone, microphone, phonetic entry pio chip, audio coder & decoder (codec), processor, radio-frequency receiving-transmitting victory change device, radio-frequency front-end and radio-frequency antenna, earphone and microphone are connected with processor with audio coder & decoder (codec) by phonetic entry pio chip successively, and processor becomes device by radio-frequency receiving-transmitting victory and is connected radio-frequency antenna with radio-frequency front-end.
Described radio-frequency front-end comprises transmitting path, receiving path, radio-frequency (RF) switch and filter, transmitting path comprise connect in turn the first transformer, the first Surface Acoustic Wave Filter SAW1, automatically controlled rapid adjustment attenuator ATT, the first power amplifier PA1, fixed attenuator, the second power amplifier PA2 and coupler, receiving path comprises the low noise amplifier LNA, the second Surface Acoustic Wave Filter SAW2 and the second transformer that connect in turn; First transformer and the second transformer become device with radio-frequency receiving-transmitting victory respectively and are connected; Coupler is connected with radio-frequency (RF) switch respectively with low noise amplifier LNA, and radio-frequency (RF) switch is connected with radio-frequency antenna by filter.
The first described transformer and the second transformer are 4:1 transformer.
Described low noise amplifier LNA is low-noise factor LNA.
The first described Surface Acoustic Wave Filter SAW1 and the second Surface Acoustic Wave Filter SAW2 is the high Surface Acoustic Wave Filter suppressed.
The beneficial effects of the utility model are:
1) radio frequency baseband chip up-to-date is at present adopted, directly complete the conversion of radiofrequency signal to digital I/Q signal, high modulation pattern (OFDM) can be realized in conjunction with dsp chip, the transmission of high power capacity, the detection (-120dBm ~-50dBm) receiving Larger Dynamic signal can be adapted to simultaneously;
2) owing to have employed OFDM modulation pattern, can reduce to a great extent and decline because city high rise building blocks the signal quality caused, the information capacity simultaneously can transmitted promotes greatly, is more than thousand times of current traditional intercom;
3) adopt the low noise amplifier that noise factor is low, ensure that higher receiving sensitivity; Adopt the high Surface Acoustic Wave Filter suppressed, strong suppression can be carried out to the interference signal outside band, ensure the quality of Received signal strength;
4) radiating portion power output is adjustable, and user can select different power grades according to actual conditions, both reduces power consumption like this, can better reduce again the interference to other receivers;
5) the utility model encryption is far away higher than traditional analog intercom, so can be applicable to some confidential communication place, larger amount of information can be transmitted simultaneously, owing to not yet there is the high power capacity digital handset of the type at present on the market, so once promote, the major transformation of intercom industry must will be led.
Accompanying drawing explanation
Fig. 1 is the theory diagram of analog-interphone in prior art;
Fig. 2 is the utility model structural schematic block diagram;
Fig. 3 is the utility model structure of radio-frequency front end schematic block diagram.
Embodiment
Below in conjunction with accompanying drawing, the technical solution of the utility model is described in further detail, but protection range of the present utility model is not limited to the following stated.
As shown in Figure 2, high power capacity wideband digital intercom, it comprises earphone, microphone, phonetic entry pio chip, audio coder & decoder (codec), processor, radio-frequency receiving-transmitting victory change device, radio-frequency front-end and radio-frequency antenna, phonetic entry pio chip selects AD73311, comprises an a road 16 bit A/D C and road 16 bit DAC; Audio coder & decoder (codec) adopts AMBE2000; Processor adopts SB3500, an an embedded ARM926EJ-S and three SandBlaster DSP core; Radio-frequency receiving-transmitting victory becomes device and is used for realizing channel transceiver and frequency-conversion processing, and digital-to-analogue, analog-to-digital conversion, adopts AD9361 to realize; Radio-frequency antenna adopts uhf band, covers 400MHz ~ 470MHz.
Earphone and microphone are connected with processor with audio coder & decoder (codec) by phonetic entry pio chip successively, and processor becomes device by radio-frequency receiving-transmitting victory and is connected radio-frequency antenna with radio-frequency front-end.
High power capacity wideband digital intercom also comprises keyboard, display, SDRAM and FLASH, and keyboard is used for information input, adopts the 4*5 keyboard of standard; Display is used for information displaying; SDRAM is for preserving channel parameter and user's default data etc., and model is H5MS1G22MFG (32M*32bit); FLASH is used for program and loads, and adopt NAND FLASH, model is MT29F1G16ABBDAH4 (64M*16bit).
As shown in Figure 3, described radio-frequency front-end comprises transmitting path, receiving path, radio-frequency (RF) switch and filter, transmitting path comprise connect in turn 4:1 transformer, the first Surface Acoustic Wave Filter SAW1, automatically controlled rapid adjustment attenuator ATT, the first power amplifier PA1, fixed attenuator, the second power amplifier PA2 and coupler, receiving path comprises the low noise amplifier LNA, the second Surface Acoustic Wave Filter SAW2 and the 4:1 transformer that connect in turn, and low noise amplifier LNA adopts low-noise factor LNA SPF5122SZ; First transformer and the second transformer become device with radio-frequency receiving-transmitting victory respectively and are connected; Coupler is connected with radio-frequency (RF) switch respectively with low noise amplifier LNA, and radio-frequency (RF) switch is connected with radio-frequency antenna by filter.The first described Surface Acoustic Wave Filter SAW1 and the second Surface Acoustic Wave Filter SAW2 all adopts the high Surface Acoustic Wave Filter suppressed.
Radio-frequency front-end major function has carries out frequency modulation, up-conversion to radio frequency, power amplification launching to baseband signal; And down-conversion to received signal, intermediate frequency amplify, frequency discrimination is to baseband signal.Transmitting branch first carries out frequency modulation to base band amplitude-modulated signal, goes out after filtering after up-conversion to tranmitting frequency again filtering through circulator and antenna transmission.Receiving branch is contrary with transmitting, obtains the input of base band amplitude-modulated signal as baseband module via carrying out demodulation to signal after down-conversion.
The above is only preferred implementation of the present utility model, be to be understood that the utility model is not limited to the form disclosed by this paper, should not regard the eliminating to other embodiments as, and can be used for other combinations various, amendment and environment, and can in contemplated scope described herein, changed by the technology of above-mentioned instruction or association area or knowledge.And the change that those skilled in the art carry out and change do not depart from spirit and scope of the present utility model, then all should in the protection range of the utility model claims.
Claims (5)
1. high power capacity wideband digital intercom, it is characterized in that: it comprises earphone, microphone, phonetic entry pio chip, audio coder & decoder (codec), processor, radio-frequency receiving-transmitting victory change device, radio-frequency front-end and radio-frequency antenna, earphone and microphone are connected with processor with audio coder & decoder (codec) by phonetic entry pio chip successively, and processor becomes device by radio-frequency receiving-transmitting victory and is connected radio-frequency antenna with radio-frequency front-end.
2. high power capacity wideband digital intercom according to claim 1, it is characterized in that: described radio-frequency front-end comprises transmitting path, receiving path, radio-frequency (RF) switch and filter, transmitting path comprise connect in turn the first transformer, the first Surface Acoustic Wave Filter SAW1, automatically controlled rapid adjustment attenuator ATT, the first power amplifier PA1, fixed attenuator, the second power amplifier PA2 and coupler, receiving path comprises the low noise amplifier LNA, the second Surface Acoustic Wave Filter SAW2 and the second transformer that connect in turn; First transformer and the second transformer become device with radio-frequency receiving-transmitting victory respectively and are connected; Coupler is connected with radio-frequency (RF) switch respectively with low noise amplifier LNA, and radio-frequency (RF) switch is connected with radio-frequency antenna by filter.
3. high power capacity wideband digital intercom according to claim 2, is characterized in that: the first described transformer and the second transformer are 4:1 transformer.
4. high power capacity wideband digital intercom according to claim 2, is characterized in that: described low noise amplifier LNA is low-noise factor LNA.
5. high power capacity wideband digital intercom according to claim 2, is characterized in that: the first described Surface Acoustic Wave Filter SAW1 and the second Surface Acoustic Wave Filter SAW2 is the high Surface Acoustic Wave Filter suppressed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420328480.XU CN204046592U (en) | 2014-06-19 | 2014-06-19 | High power capacity wideband digital intercom |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420328480.XU CN204046592U (en) | 2014-06-19 | 2014-06-19 | High power capacity wideband digital intercom |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204046592U true CN204046592U (en) | 2014-12-24 |
Family
ID=52247213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420328480.XU Expired - Fee Related CN204046592U (en) | 2014-06-19 | 2014-06-19 | High power capacity wideband digital intercom |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204046592U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105406885A (en) * | 2015-12-14 | 2016-03-16 | 天津光电通信技术有限公司 | Automatic ship identification system adopting radio frequency (RF) agile transceiver AD9361 and configuration method |
| CN109067422A (en) * | 2018-09-13 | 2018-12-21 | 深圳天之励诚科技有限公司 | A kind of tetra terminal realizing method |
| CN111697985A (en) * | 2020-06-12 | 2020-09-22 | 芯朴科技(上海)有限公司 | 5G radio frequency receiving circuit and wireless communication equipment |
-
2014
- 2014-06-19 CN CN201420328480.XU patent/CN204046592U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105406885A (en) * | 2015-12-14 | 2016-03-16 | 天津光电通信技术有限公司 | Automatic ship identification system adopting radio frequency (RF) agile transceiver AD9361 and configuration method |
| CN109067422A (en) * | 2018-09-13 | 2018-12-21 | 深圳天之励诚科技有限公司 | A kind of tetra terminal realizing method |
| CN111697985A (en) * | 2020-06-12 | 2020-09-22 | 芯朴科技(上海)有限公司 | 5G radio frequency receiving circuit and wireless communication equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105610453B (en) | A kind of high-gain narrow radio frequency receiver | |
| TW200746778A (en) | Cellular phone with integrated FM radio and remote low noise amplifier | |
| CN203632660U (en) | Radiofrequency front circuit and system | |
| CN212163313U (en) | Wide-frequency-band double-channel radio monitoring receiving system | |
| CN204046592U (en) | High power capacity wideband digital intercom | |
| KR20070066674A (en) | Power-saving wireless transceiver with sub-sampling architecture | |
| CN103546189A (en) | Radio-frequency front end circuit and system | |
| CN106506036A (en) | Radio circuit and mobile terminal | |
| CN110011672A (en) | The radio architectures of wide-band communication system | |
| CN203554424U (en) | Eight-element antenna array-based GNSS anti-interference receiver radio frequency front-end device | |
| EP1900108A4 (en) | Apparatus and method for iip3 control for a wireless transceiver | |
| CN202334510U (en) | Transceiver for millimeter wave active personnel safety inspection device | |
| CN202586957U (en) | Wireless frequency modulation handheld station | |
| CN204177972U (en) | Beidou satellite navigation single/double mode hand-hold radio frequency component | |
| CN201533308U (en) | Medium-long wave digital spread-spectrum communication apparatus | |
| CN101610306A (en) | Radio communication device | |
| CN208675206U (en) | The radio architectures of wide-band communication system | |
| CN207623509U (en) | Radar receiver under a kind of L-band fixed ampllitude | |
| CN204090153U (en) | Multifunction blue tooth hearing aids | |
| CN211457364U (en) | Bluetooth BLE wireless microphone system | |
| CN206164485U (en) | Big dynamic automatic gain control circuit in broadband | |
| CN201188660Y (en) | Television embedded with wireless sound transmitting device | |
| CN105591655A (en) | Dynamic anti-interference receiver device and method | |
| Korpi et al. | Implementation challenges in full-duplex radio transceivers | |
| CN209283218U (en) | Automatic growth control zero intermediate frequency reciver |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141224 Termination date: 20160619 |