CN202395808U - Single-point modulation wireless communication device - Google Patents
Single-point modulation wireless communication device Download PDFInfo
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- CN202395808U CN202395808U CN2011204137876U CN201120413787U CN202395808U CN 202395808 U CN202395808 U CN 202395808U CN 2011204137876 U CN2011204137876 U CN 2011204137876U CN 201120413787 U CN201120413787 U CN 201120413787U CN 202395808 U CN202395808 U CN 202395808U
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Abstract
The utility model relates to a single-point modulation wireless communication device. The single-point modulation wireless communication device comprises an audio and baseband signal processing unit, a frequency synthesizer (PLL), a voltage controlled oscillator (VCO), and a reference clock (VT-TCXO). The single-point modulation wireless communication device is characterized in that signals that have been processed by the audio and baseband signal processing unit are modulated via the reference clock (VT-TCXO), and then are modulated by the frequency synthesizer (PLL) onto the voltage controlled oscillator (VCO). The single-point modulation wireless communication device exhibits fine stability and consistency, is convenient for production, and enables the production cost to be reduced.
Description
Technical field
The utility model relates to Wireless Telecom Equipment, particularly based on the Wireless Telecom Equipment of the single-point modulation system of reference clock.
Background technology
Wireless Telecom Equipment is to use at present one of quite general wireless communication tool, in numerous occasions such as industry, agricultural, forestry, commercial affairs, fire-fighting, public security and business, all has widely-used.With the Wireless Telecom Equipment conversation, cost is low, and does not receive the restriction of network.In the place that public network does not cover, professional Wireless Telecom Equipment can let the user easily link up.Along with the development of Wireless Telecom Equipment, the technical merit of Wireless Telecom Equipment is greatly improved, but from manufacturer, improves consistency of product, improves the stability of product, for the very important meaning that reduced production costs.
Summary of the invention
The purpose of the utility model is to the demand of reality a kind of novel Wireless Telecom Equipment to be provided, and this Wireless Telecom Equipment stability, high conformity are convenient to produce and reduce production costs.
For realizing above-mentioned technical purpose, the utility model adopts following technical scheme:
A kind of Wireless Telecom Equipment; Comprise audio frequency and baseband signal processing unit, frequency synthesizer (PLL), voltage controlled oscillator (VCO), reference clock (VC-TCXO); It is characterized in that; The input of said reference clock (VC-TCXO) is connected with baseband signal processing unit with said audio frequency, and the output of said reference clock (VC-TCXO) is connected with said frequency synthesizer (PLL); Signal after said audio frequency and baseband signal processing unit are handled is modulated on the voltage controlled oscillator (VCO) through frequency synthesizer (PLL) after reference clock (VC-TCXO) modulation again.
For further realizing above-mentioned technical purpose, said frequency synthesizer (PLL) includes phase discriminator, loop filter.
The utlity model has following technological merit: 1, the utility model adopts single-point (a bit) modulation system, compares with existing single-point modulation system, can realize the effective modulation to low frequency signal (less than 50Hz); 2, the utility model adopts single-point (a bit) modulation system, compares with existing 2 modulation systems, has solved the phase difference problem of its existence well; 3, the utility model adopts single-point (a bit) modulation system, can accomplish the good linearity, helps the realization of high linearity product, is convenient to large-scale mass production, can effectively enhance productivity and improves consistency of product.
Description of drawings
Fig. 1 is the structural representation of the utility model Wireless Telecom Equipment.
Fig. 2 is the circuit diagram of a preferred embodiment of the utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is done detailed explanation.
As shown in Figure 1, the utility model, a kind of Wireless Telecom Equipment of the single-point modulation system based on reference clock includes receiver 1; Loud speaker 2, audio frequency and baseband signal processing unit 3, reference clock (VC-TCXO) 4; Frequency synthesizer (PLL) 5, voltage controlled oscillator (VCO) 6, receiving circuit unit 7; Radiating circuit unit 8, matching network unit 9, antenna 10.Wherein, the input of reference clock (VC-TCXO) 4 is connected with baseband signal processing unit 3 with audio frequency, and the output of reference clock (VC-TCXO) 4 is connected with frequency synthesizer (PLL) 5; Frequency synthesizer (PLL) 5 includes phase discriminator, loop filter.
The utility model Wireless Telecom Equipment in use, emission process is: a, receiver 1 delivers to audio frequency and baseband signal processing unit 3 to the voice signal that receives; B, audio frequency carry out treatment conversion to the audio signal that receives with baseband processing unit 3 and become reference clock 4 acceptable modulation signals (MOD1); C, modulation signal (MOD1) produce modulating action on reference clock 4, modulate through the radiofrequency signal on 5 pairs of voltage controlled oscillators 6 of frequency synthesizer; Radiofrequency signal after d, the modulated is delivered to radiating circuit unit 8 and is amplified; E, the radiofrequency signal after amplifying can be crossed antenna 10 then and launch through matching network 9.
Receiving course is: a, the radiofrequency signal that receives through antenna 10 get into receiving circuit units 7 through matching network 9; B, 7 pairs of receiving circuit units receive and reach radiofrequency signal and amplify, and deliver to audio frequency and baseband processing unit 3 after the demodulation; C, audio frequency and baseband processing unit 3 reduce the restituted signal that receives after treatment becomes voice, then through loud speaker 2 output voice.
The wireless telecommunications system of the utility model can be a wireless interspeaker, also can be mobile phone or other equipment.
Fig. 2 is the circuit diagram of a preferred embodiment of the utility model.Wherein, X3 is reference clock (VC-TCXO), and U10 is frequency synthesizer (PLL), and the MOD1 signal is directly modulated the radiofrequency signal on the voltage controlled oscillator 6 to X3, U10.
The utility model Wireless Telecom Equipment has the following advantages:
1, only solved in the prior art through in the voltage controlled oscillator single-point modulation system Wireless Telecom Equipment, the low frequency composition can not effective modulated defective.
2, solved in the prior art problem of the phase difference bad control that exists in 2 modulation system Wireless Telecom Equipments.
3, circuit structure is simpler, has reduced components and parts, has practiced thrift cost.
4, only lead up to the mode that reference clock modulates, can better control consistency of product and stability, be convenient to produce in batches.
Although the utility model is described to particularity to a certain degree, please understands current disclosure information and only only adopt diagram.Under the situation of the spirit of deviation affects the utility model not and scope, when making and arranging the details of various parts, can take a series of change measure.
Claims (2)
1. single-point modulation radio communication equipment; Comprise audio frequency and baseband signal processing unit, frequency synthesizer (PLL), voltage controlled oscillator (VCO), reference clock (VC-TCXO); It is characterized in that; The input of said reference clock (VC-TCXO) is connected with baseband signal processing unit with said audio frequency, and the output of said reference clock (VC-TCXO) is connected with said frequency synthesizer (PLL); Signal after said audio frequency and baseband signal processing unit are handled is modulated on the voltage controlled oscillator (VCO) through frequency synthesizer (PLL) after reference clock (VC-TCXO) modulation again.
2. single-point modulation radio communication equipment according to claim 1 is characterized in that said frequency synthesizer (PLL) includes phase discriminator, loop filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204137876U CN202395808U (en) | 2011-10-26 | 2011-10-26 | Single-point modulation wireless communication device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204137876U CN202395808U (en) | 2011-10-26 | 2011-10-26 | Single-point modulation wireless communication device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202395808U true CN202395808U (en) | 2012-08-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204137876U Expired - Fee Related CN202395808U (en) | 2011-10-26 | 2011-10-26 | Single-point modulation wireless communication device |
Country Status (1)
| Country | Link |
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| CN (1) | CN202395808U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103227659A (en) * | 2013-03-04 | 2013-07-31 | 福建省万华电子科技有限公司 | Digital DPMR (digital private mobile radio) interphone based on single-point modulation of digital frequency synthesizer |
| CN103248391A (en) * | 2013-03-04 | 2013-08-14 | 福建省万华电子科技有限公司 | Digital DMR interphone using digital frequency synthesizer as local oscillator |
| CN105897298A (en) * | 2016-06-03 | 2016-08-24 | 北京航空航天大学 | Multi-stage modular wireless transceiver experimental platform |
| CN112803135A (en) * | 2021-01-07 | 2021-05-14 | 湖南迈克森伟电子科技有限公司 | Novel self-adaptive frequency broadband antenna |
-
2011
- 2011-10-26 CN CN2011204137876U patent/CN202395808U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103227659A (en) * | 2013-03-04 | 2013-07-31 | 福建省万华电子科技有限公司 | Digital DPMR (digital private mobile radio) interphone based on single-point modulation of digital frequency synthesizer |
| CN103248391A (en) * | 2013-03-04 | 2013-08-14 | 福建省万华电子科技有限公司 | Digital DMR interphone using digital frequency synthesizer as local oscillator |
| CN105897298A (en) * | 2016-06-03 | 2016-08-24 | 北京航空航天大学 | Multi-stage modular wireless transceiver experimental platform |
| CN112803135A (en) * | 2021-01-07 | 2021-05-14 | 湖南迈克森伟电子科技有限公司 | Novel self-adaptive frequency broadband antenna |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: FUJIAN BEIFENG TELECOM TECHNOLOGY CO., LTD. Assignor: Du Qinghai Contract record no.: 2014990000445 Denomination of utility model: Single-point modulation wireless communication device Granted publication date: 20120822 License type: Exclusive License Record date: 20140623 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120822 Termination date: 20141026 |
|
| EXPY | Termination of patent right or utility model |