CN203399103U - TDD digital interphone system - Google Patents
TDD digital interphone system Download PDFInfo
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- CN203399103U CN203399103U CN201320366414.7U CN201320366414U CN203399103U CN 203399103 U CN203399103 U CN 203399103U CN 201320366414 U CN201320366414 U CN 201320366414U CN 203399103 U CN203399103 U CN 203399103U
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Abstract
The utility model relates to a TDD digital interphone system. According to the function division, the system is composed of a voice signal acquisition module, a voice signal processing module, a control module, a wireless transmission module, an interphone auxiliary module and a voice signal output module. The voice signal acquisition module is connected with the voice signal processing module through a preamplifier circuit. The voice signal output module is connected with the voice signal processing module through an audio amplifier circuit. The voice signal processing module is connected with the control module through a circuit. The control module is connected with the wireless transmission module through a communication circuit. According to the utility model, a TDD technology is adopted; a frequency spectrum is efficiently used; the TDD digital interphone system is suitable for an asymmetrical data service; power control is easy; a smart antenna technology is conveniently used; the device cost is reduced; the interphone performance is improved; and the market prospect is broad.
Description
Technical field
The utility model relates to wireless communication technology field, is specifically related to a kind of TDD digital handset system.
Background technology
Time division duplex (Time Diviosion Duplex TDD) technology is a class important technology of wireless communication field.Frequency resource is utilized aspect, and TDD wireless technology has great advantage, can maximally utilise the very valuable Radio Spectrum Resource as one of national strategy resource.Owing to there being advantageous advantage aspect spectrum efficiency, time division duplex (TDD) technology is subject to increasing attention in recent years in the world.
The transmission means of wireless communication system can minute one-way transmission (broadcast type) and transmitted in both directions (replying formula).Transmitted in both directions has again single work, half-duplex and three kinds of working methods of full duplex; Full-duplex communication refers to that communicating pair can carry out the working method of transmission information simultaneously, can separate sending and receiving by frequency or time.
The duplexing design of radio communication has two kinds: Frequency Division Duplexing (FDD) (FDD) and time division duplex (TDD).FDD realizes two-way communication and uses two different frequency bands to need paired frequency for two-way communication, and needs a band frequency spacer, avoids up-downgoing to disturb; In the wireless communication system of tdd mode, reception and transmission are at same frequency channels, and the different time-gap of carrier wave, uses the separated reception of assurance time and transfer channel.
Adopting the mobile communication system feature of different dual-modes is different from communication benefit.Same frequency for up-downgoing channel in the mobile communication system of tdd mode; thereby there is the reciprocity of up-downgoing channel; this brings up and descending same frequency, the next separated reception in use guard time interval and the transmitting channel of all working in of many advantages: TDD to wireless communication system of tdd mode.Compare with FDD, TDD has following technological merit: 1, the more effective frequency spectrum that utilizes; 2, be more suitable in asymmetric data service; 3, being easier to power controls; 4, use more easily intelligent antenna technology; 5, reduce equipment cost.
The data of TDD mode are with the form transmission of high-speed burst frame; TDD agreement is exactly to adopt special Handshake Protocol to set up the burst synchronization of two communication equipments; when two equipment communicate; can guarantee when wherein a side sends data; the opposing party must receive data; TDD agreement completes full-duplex communication by alternately communication device configured being become to receive state or sending state, and a Burst Period comprises sending time slots, receiving slot and two protection time slots.
At present, the intercom market of China remains analog intercom and occupies an leading position.But analog-interphone exists many shortcomings with not enough: one, what analog-interphone transmitted is analog signal, and signal processing mode is simple, and consumed power is larger, can not effectively eliminate and disturb and the impact of noise, cause the speech quality in many situations can not be satisfactory; Its two, the frequency efficiency of analog-interphone is not high, channel capacity is low; Its three, analog-interphone confidentiality is poor, is easily ravesdropping.
China Patent No.: 200510032685.9 patent documentation discloses a kind of 400MHz common frequency range digital intercom, comprise voice transmitting-receiving circuit, radio-frequency (RF) transmit-receive circuit, control circuit, power circuit, digital speech processing module, described digital speech processing module is connected with control circuit, voice transmitting-receiving circuit, power circuit respectively, and is connected with radio-frequency (RF) transmit-receive circuit by analog to digital conversion circuit.Utilize aforementioned digital handset to realize the method for communication; mainly to utilize digital speech processing module to carry out digital processing to baseband analog voice signal; generation digital baseband transmits, then offers radio-frequency (RF) transmit-receive circuit through digital-to-analogue conversion generation output modulated-analog signal; And demodulated baseband signal is carried out to analog-to-digital conversion, and produce digital baseband and receive signal, its processing is obtained to audio digital signals, then become Analog Baseband voice signal through digital-to-analogue conversion, offer loud speaker.The advantage of this invention be there is strong interference immunity, speech quality is good, the availability of frequency spectrum is high, low in energy consumption, degree of integration is high, function upgrading expansion easily.But this intercom yet has certain defect, and Frequency Band Selection is more single, is only suitable for the common frequency band of 400M, can not meet different needs.Transmitting power is large not, and the dry ratio of letter that signal receives is relatively little; When operator runs into accident, called party can not determine its position under special circumstances, and then can not effectively help it.
Utility model content
The purpose of this utility model is to overcome the shortcoming of existing talkback system, and a kind of TDD digital handset system is provided.
For achieving the above object, concrete scheme of the present utility model is as follows:
A digital handset system, can consist of the following components according to the division in function: speech signal collection module, voice signal processing module, control module, wireless transport module, intercom supplementary module and voice signal output module; Described speech signal collection module is connected with voice signal processing module by pre-amplification circuit wherein; Described voice signal output module is connected with voice signal processing module by audio-frequency amplifier circuit wherein; Described voice signal processing module is connected with control module by circuit; Described control module is connected with wireless transport module by telecommunication circuit.
Further, described speech signal collection module is mainly responsible for the detection of original analog voice signal and collection, and common equipment is microphone;
Further, described voice signal processing module is responsible for analog voice signal to carry out the work such as digital sample, encoder/decoder, data compression, enciphering/deciphering, filtering, with speech processes integrated chip, carry out hardware realization, speech chip adopts the dedicated voice coded modulation chip of supporting auto-adaptive increment modulation;
Further, described control module is mainly responsible for computing, the control of data, the control of software flow is mainly served as by the microprocessor that has central processing unit function, selects DSP or single-chip microcomputer to realize, and the technical program is selected MSP430 single-chip microcomputer;
Further, described wireless transport module is mainly responsible for modulating/demodulating, the sending/receiving function of signal, mainly by special-purpose wireless signal radio frequency chip, is completed;
Further, described voice signal output module is mainly responsible for the output to the voice signal after processing, and it is mainly loud speaker;
Further, described supplementary module mainly comprises: operating key and display screen.
The beneficial effects of the utility model: a kind of TDD digital handset system the utility model proposes, adopt TDD technology, the more effective frequency spectrum that utilizes, be more suitable in asymmetric data service, be easier to power and control, use more easily intelligent antenna technology, reduced equipment cost, improve the performance of intercom, there are wide market prospects.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
As shown in Figure 1, a kind of TDD digital handset system, can consist of the following components according to the division in function: speech signal collection module 1, voice signal processing module 2, control module 3, wireless transport module 4, intercom supplementary module 5 and voice signal output module 6; Described speech signal collection module 1 is connected with voice signal processing module 2 by pre-amplification circuit wherein; Described voice signal output module 6 is connected with voice signal processing module 2 by audio-frequency amplifier circuit wherein; Described voice signal processing module 2 is connected with control module 3 by circuit; Described control module 3 is connected with wireless transport module 4 by telecommunication circuit.
As shown in Figure 1, described main being responsible for the detection of original analog voice signal and collection of speech signal collection module 1, common equipment is microphone 8;
As shown in Figure 1, described voice signal processing module 2 is responsible for analog voice signal to carry out the work such as digital sample, encoder/decoder, data compression, enciphering/deciphering, filtering, with speech processes integrated chip, carry out hardware realization, speech chip adopts the dedicated voice coded modulation chip of supporting auto-adaptive increment modulation;
As shown in Figure 1, described control module master 3 will be responsible for the control of computing, data, the control of software flow, mainly by the microprocessor that has central processing unit function, is served as, and selects DSP or single-chip microcomputer to realize, and the technical program is selected MSP430 single-chip microcomputer;
As shown in Figure 1, described main modulating/demodulating, the sending/receiving function of being responsible for signal of wireless transport module 4, is mainly completed by special-purpose wireless signal radio frequency chip;
As shown in Figure 1, the main output of being responsible for the voice signal after processing of described voice signal output module 6, it is mainly loud speaker 7;
As shown in Figure 1, described supplementary module 5 mainly comprises: operating key and display screen.
Claims (5)
1. a TDD digital handset system, is characterized in that: by speech signal collection module, and voice signal processing module, control module, wireless transport module, intercom supplementary module and voice signal output module form; Described speech signal collection module is connected with voice signal processing module by pre-amplification circuit wherein; Described voice signal output module is connected with voice signal processing module by audio-frequency amplifier circuit wherein; Described voice signal processing module is connected with control module by circuit; Described control module is connected with wireless transport module by telecommunication circuit; Described speech signal collection module is mainly responsible for the detection of original analog voice signal and collection, and common equipment is microphone.
2. a kind of TDD digital handset system according to claim 1, it is characterized in that: voice signal processing module is responsible for analog voice signal to carry out the work such as digital sample, encoder/decoder, data compression, enciphering/deciphering, filtering, with speech processes integrated chip, carry out hardware realization, speech chip adopts the dedicated voice coded modulation chip of supporting auto-adaptive increment modulation.
3. a kind of TDD digital handset system according to claim 1, it is characterized in that: control module is mainly responsible for computing, the control of data, the control of software flow, mainly by the microprocessor that has central processing unit function, served as, select DSP or single-chip microcomputer to realize, the technical program is selected MSP430 single-chip microcomputer.
4. a kind of TDD digital handset system according to claim 1, is characterized in that: wireless transport module is mainly responsible for modulating/demodulating, the sending/receiving function of signal, mainly by special-purpose wireless signal radio frequency chip, is completed.
5. a kind of TDD digital handset system according to claim 1, is characterized in that: voice signal output module is mainly responsible for the output to the voice signal after processing, and it is mainly loud speaker; Supplementary module mainly comprises: operating key and display screen.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320366414.7U CN203399103U (en) | 2013-06-25 | 2013-06-25 | TDD digital interphone system |
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| CN201320366414.7U CN203399103U (en) | 2013-06-25 | 2013-06-25 | TDD digital interphone system |
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| CN203399103U true CN203399103U (en) | 2014-01-15 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106253961A (en) * | 2016-07-27 | 2016-12-21 | 成举炳 | Single-frequency radio communication recording window machine controller and control method thereof |
| CN106330237A (en) * | 2016-10-18 | 2017-01-11 | 深圳市大语科技有限公司 | Narrow-band wireless digital speech time division duplex intercom system |
| CN108337579A (en) * | 2017-01-20 | 2018-07-27 | 长沙海力电子科技发展有限公司 | A kind of teaching indoor and outdoor wireless interspeaker system |
| CN110198497A (en) * | 2019-06-21 | 2019-09-03 | 福建省万华电子科技有限公司 | A kind of digital walkie-talkie and its communication means of common-frequency time division duplex |
| CN111313926A (en) * | 2020-02-20 | 2020-06-19 | 中国人民解放军空军特色医学中心 | Time division duplex ad hoc network wireless communication device and communication method thereof |
-
2013
- 2013-06-25 CN CN201320366414.7U patent/CN203399103U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106253961A (en) * | 2016-07-27 | 2016-12-21 | 成举炳 | Single-frequency radio communication recording window machine controller and control method thereof |
| CN106253961B (en) * | 2016-07-27 | 2019-05-10 | 成举炳 | The control method of single-frequency radio communication recording window machine controller |
| CN106330237A (en) * | 2016-10-18 | 2017-01-11 | 深圳市大语科技有限公司 | Narrow-band wireless digital speech time division duplex intercom system |
| CN108337579A (en) * | 2017-01-20 | 2018-07-27 | 长沙海力电子科技发展有限公司 | A kind of teaching indoor and outdoor wireless interspeaker system |
| CN110198497A (en) * | 2019-06-21 | 2019-09-03 | 福建省万华电子科技有限公司 | A kind of digital walkie-talkie and its communication means of common-frequency time division duplex |
| CN110198497B (en) * | 2019-06-21 | 2024-04-09 | 福建省万华电子科技有限公司 | Digital interphone with same-frequency time division duplex and communication method thereof |
| CN111313926A (en) * | 2020-02-20 | 2020-06-19 | 中国人民解放军空军特色医学中心 | Time division duplex ad hoc network wireless communication device and communication method thereof |
| CN111313926B (en) * | 2020-02-20 | 2021-03-02 | 中国人民解放军空军特色医学中心 | Time division duplex ad hoc network wireless communication device and communication method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140115 Termination date: 20140625 |
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| EXPY | Termination of patent right or utility model |