CN103188696A - Digital enclave companding system and time delay synchronizing method thereof - Google Patents
Digital enclave companding system and time delay synchronizing method thereof Download PDFInfo
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- CN103188696A CN103188696A CN2011104473265A CN201110447326A CN103188696A CN 103188696 A CN103188696 A CN 103188696A CN 2011104473265 A CN2011104473265 A CN 2011104473265A CN 201110447326 A CN201110447326 A CN 201110447326A CN 103188696 A CN103188696 A CN 103188696A
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Abstract
The invention discloses a digital enclave companding system and a time delay synchronizing method thereof. The digital enclave companding system comprises a near-end machine and a plurality of far-end machines, wherein the near-end machine and the far-end machines are provided with signal transmitting-receiving devices; the near-end machine is internally provided with a near-end machine time delay calibration module; the near-end machine time delay calibration module is connected with a near-end machine time delay calibration channel; far-end machine time delay calibration channels are formed in the far-end machines, and connected with far-end machine time delay calibration modules; and the far-end machine time delay calibration modules are connected with time delay compensation modules. According to the digital enclave companding system and the time delay synchronizing method thereof, the near-end machine and the far-end machines are provided with the time delay calibration modules, same frequency interference among the far-end machines is eliminated and an overlapping coverage effect is avoided by the time delay synchronizing method, so that the far-end machines receive and transmit signals synchronously, and the quality of signals in a coverage area of the digital enclave companding system is good.
Description
Technical field
The present invention relates to the communications field, particularly a kind of digital enclave companding system and time delay method for synchronous thereof.
Background technology
Along with the quickening of social informatization, improve day by day to the demand of mobile communication in outlying small towns.Yet because remote countryside is far away apart from cities and towns, be difficult to receive the base station signal from cities and towns, and these areas are subjected to the restriction of geography, economic condition, communication conditions is relatively poor, if adopt the signal of primary frequency, then be subject to the external environment influence, the radio propagation path loss is bigger, and in ground, mountain area type complexity, signal is blocked easily.What therefore, adopt in outlying rural area is that digital enclave companding system communicates transfer of data.Numeral enclave companding system comprises near-end machine, remote termination, passes through transmission of wireless signals between near-end machine and the remote termination.Numeral enclave companding system is by compression and despreading method, and the primary frequency signal that the base station is launched converts repeating signal to, transmits between near-end machine and remote termination.
Traditional enclave companding system adopts the form of near-end machine and remote termination one-to-one to carry out the networking design, namely a near-end machine and a remote termination carry out transfer of data, make that like this number of devices that needs is more in certain networking zone, the cable wiring manufacture difficulty is bigger.And in complicated overlay environments such as some highways, railway, tunnel, though existing enclave companding system is also adopting one to drag many cloth net modes, namely a near-end machine connects a plurality of remote terminations, reduce the cable wiring manufacture complexity like this, also reduced number of devices, but directly adopted coupled modes to be connected between near-end machine and the remote termination, when transfer of data, easily produce co-channel interference, overlapping covering phenomenon between the remote termination, the poor signal quality of transmission, the signal that influences each remote termination sends and receives.
Summary of the invention
The objective of the invention is to overcome existing above-mentioned deficiency in the prior art, a kind of digital enclave companding system and time delay method for synchronous thereof are provided, this numeral enclave companding system and time delay method for synchronous thereof can solve signal overlap covering dispersive influence between a plurality of remote terminations, make that each remote termination sending and receiving signal is synchronous, guaranteed that signal quality is good in the companding system coverage area of digital enclave, solved the deficiency that existing networking is used.
In order to realize the foregoing invention purpose, the invention provides following technical scheme:
A kind of digital enclave companding system, comprise near-end machine, remote termination, described near-end machine and remote termination are provided with signal receiving/transmission device, be provided with near-end machine time delay calibration module in the described near-end machine, described near-end machine time delay calibration module connects near-end machine time delay calibrated channel, described remote termination is a plurality of, and be provided with remote termination time delay calibrated channel in a plurality of remote terminations, described remote termination time delay calibrated channel connects remote termination time delay calibration module, and described remote termination time delay calibration module connects the delay compensation module.Preferably, described signal receiving/transmission device is Yagi antenna.
Described near-end machine time delay calibrated channel is the transmission channel of near-end machine time delay calibrating sequence, and remote termination time delay calibrated channel is the transmission channel of remote termination time delay calibrating sequence; Near-end machine time delay calibration module is used for the time difference of the calibrating sequence that relatively this machine calibrating sequence and each remote termination return, and obtains maximum delay information in each remote termination that the near-end machine connects; Each remote termination time delay calibration module is used for comparing the difference of this machine time delay and near-end machine return time delay information, and gives this machine delay compensation module with difference; Remote termination delay compensation module is made of delayer, is used for compensating this machine time delay, realizes that each remote termination is with respect to near-end machine time delay information unanimity.
Numeral enclave companding system time delay method for synchronous, this time delay method for synchronous may further comprise the steps:
1) near-end machine time delay calibration module sends to each remote termination by near-end machine calibrated channel with the time delay calibrating sequence;
2) each remote termination receives the time delay calibrating sequence that the near-end machine sends by remote termination time delay calibrated channel, and each remote termination returns the calibrating sequence of receiving to the near-end machine that sends to by remote termination time delay calibration module;
3) after the near-end machine receives the calibrating sequence that each remote termination returns, compare processing with the initialization calibrating sequence, the calibrating sequence that this machine is sent is designated as T
0, the calibrating sequence time that remote termination is returned is designated as T
1, by the different time difference △ T=T of contrast
1-T
0Obtain the time delay information of each remote termination, and long delay information is sent to each remote termination by near-end machine calibrated channel;
4) after each remote termination receives long delay information, this machine time delay information of storing in itself and the remote termination time delay calibration module is compared, obtain the time delay difference, then the time delay difference is write this machine delay compensation module and adjust, realize that each remote termination is to the time delay unanimity of near-end machine.
Compared with prior art, beneficial effect of the present invention:
1, because near-end machine and remote termination are provided with the time delay calibration module, by the time delay method for synchronous, the time delay information compensation unanimity of the remote terminations at different levels that automatic terminal nearly connects, guaranteed that remote terminations transmitting-receivings at different levels that the near-end machine connects synchronously, eliminated co-channel interference phenomenon between each remote termination, avoided overlapping covering influence (namely avoiding the multidiameter delay of overlapping covering to disturb), make that each remote termination sending and receiving signal is synchronous, guaranteed that digital enclave companding system one drags in the overlay areas of using signal quality good more.
2, the time delay of each remote termination and near-end machine is adjusted synchronously and is finished automatically, in real time, accurately, has reduced the manual maintenance cost.
3, reduce the number of devices of arranging net, reduced the cable wiring manufacture component difficulty, significantly reduced the networking cost.
Description of drawings:
Fig. 1 is the present invention's numeral enclave companding system architecture diagram.
Embodiment
The present invention is described in further detail below in conjunction with testing example and embodiment.But this should be interpreted as that the scope of the above-mentioned theme of the present invention only limits to following embodiment, all technology that realizes based on content of the present invention all belong to scope of the present invention.
As shown in Figure 1, digital enclave of the present invention companding system, comprise near-end machine, remote termination, described near-end machine and remote termination are provided with signal receiving/transmission device, described signal receiving/transmission device is Yagi antenna, be provided with the time delay calibration module in the described near-end machine, described time delay calibration module connects the time delay calibrated channel, described remote termination is a plurality of, also all be provided with the time delay calibrated channel in a plurality of remote terminations, described time delay calibrated channel connects the time delay calibration module, and described time delay calibration module connects the delay compensation module.
Described near-end machine time delay calibrated channel is the transmission channel of near-end machine time delay calibrating sequence, and remote termination time delay calibrated channel is the transmission channel of remote termination time delay calibrating sequence; Near-end machine time delay calibration module is used for the time difference of the calibrating sequence that relatively this machine calibrating sequence and each remote termination return, and obtains maximum delay information in each remote termination that the near-end machine connects; Each remote termination time delay calibration module is used for comparing the difference of this machine time delay and near-end machine return time delay information, and gives this machine delay compensation module with difference; Remote termination delay compensation module is made of delayer, is used for compensating this machine time delay, realizes that each remote termination is with respect to near-end machine time delay information unanimity.
Companding system time delay method for synchronous in digital enclave of the present invention may further comprise the steps:
1) near-end machine time delay calibration module sends to each remote termination by near-end machine calibrated channel with the time delay calibrating sequence;
2) each remote termination receives the time delay calibrating sequence that the near-end machine sends by remote termination time delay calibrated channel, and each remote termination turns back to the near-end machine by remote termination time delay calibration module with time delay information;
3) the near-end machine receives calibrating sequence and the initialization calibrating sequence that each remote termination returns and compares processing, and the calibrating sequence that this machine is sent is designated as T
0, the calibrating sequence time that remote termination is returned is designated as T
1, by the different time difference △ T=T of contrast
1-T
0Obtain the time delay information of each remote termination, and long delay information is sent to each remote termination by near-end machine calibrated channel;
4) after each remote termination receives long delay information, this machine time delay information of storing in itself and the remote termination time delay calibration module is compared, obtain the time delay difference, then the time delay difference is write this machine delay compensation module, realize that by increasing this machine time delay each remote termination is to the time delay unanimity of near-end machine.
Digital enclave companding system of the present invention and time delay method for synchronous thereof, eliminated co-channel interference phenomenon between each remote termination, avoided overlapping covering influence, made that each remote termination sending and receiving signal is synchronous, guaranteed that signal quality is good in the companding system coverage area of digital enclave.
Claims (6)
1. digital enclave companding system, comprise near-end machine, remote termination, described near-end machine and remote termination are provided with signal receiving/transmission device, it is characterized in that, be provided with near-end machine time delay calibration module in the described near-end machine, described near-end machine time delay calibration module connects near-end machine time delay calibrated channel, described remote termination is a plurality of, and be provided with remote termination time delay calibrated channel in a plurality of remote terminations, described remote termination time delay calibrated channel connects remote termination time delay calibration module, and described remote termination time delay calibration module connects the delay compensation module.
2. digital enclave according to claim 1 companding system, it is characterized in that, the transmission channel that described near-end machine time delay calibrated channel provides for near-end machine time delay calibrating sequence, the transmission channel that remote termination time delay calibrated channel provides for remote termination time delay calibrating sequence.
3. digital enclave according to claim 2 companding system, it is characterized in that, described near-end machine time delay calibration module is used for the time difference of the calibrating sequence that relatively this machine calibrating sequence and each remote termination return, and obtains maximum delay information in each remote termination that the near-end machine connects; Each remote termination time delay calibration module is used for comparing the difference of this machine time delay and near-end machine return time delay information, and gives this machine delay compensation module with difference.
4. digital enclave according to claim 3 companding system is characterized in that described remote termination delay compensation module is made of delayer, is used for compensating this machine time delay, realizes that each remote termination is with respect to near-end machine time delay information unanimity.
5. digital enclave according to claim 4 companding system is characterized in that described signal receiving/transmission device is Yagi antenna.
6. according to the described digital enclave of one of claim 1 to 5 companding system time delay method for synchronous, it is characterized in that this time delay method for synchronous may further comprise the steps:
1) near-end machine time delay calibration module sends to each remote termination by near-end machine calibrated channel with the time delay calibrating sequence;
2) each remote termination receives the time delay calibrating sequence that the near-end machine sends by remote termination time delay calibrated channel, and each remote termination turns back to the near-end machine by remote termination time delay calibration module with time delay information;
3) the near-end machine receives calibrating sequence and the initialization calibrating sequence that each remote termination returns and compares processing, and the calibrating sequence that this machine is sent is designated as T
0, the calibrating sequence time that remote termination is returned is designated as T
1, by the different time difference △ T=T of contrast
1-T
0Obtain the time delay information of each remote termination, and long delay information is sent to each remote termination by near-end machine calibrated channel;
4) after each remote termination receives long delay information, this machine time delay information of storing in itself and the remote termination time delay calibration module is compared, obtain the time delay difference, then the time delay difference is write this machine delay compensation module and adjust, realize that each remote termination is to the time delay unanimity of near-end machine.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107707325A (en) * | 2017-11-03 | 2018-02-16 | 深圳市银河风云网络系统股份有限公司 | Synchronisation control means and terminal control system |
| CN115280690A (en) * | 2020-03-10 | 2022-11-01 | 哲库科技有限公司 | Delay line based transceiver calibration |
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| EP2262299A2 (en) * | 1999-06-01 | 2010-12-15 | Qualcomm Incorporated | Method for cell extension in a tdma cellular telephone system |
| CN102221816A (en) * | 2010-04-19 | 2011-10-19 | 普天信息技术研究院有限公司 | Satellite time serving all-in-one machine and time serving method thereof |
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| EP2262299A2 (en) * | 1999-06-01 | 2010-12-15 | Qualcomm Incorporated | Method for cell extension in a tdma cellular telephone system |
| CN201601830U (en) * | 2009-09-27 | 2010-10-06 | 西瑞克斯(北京)通信设备有限公司 | CDMA digital enclave companding system |
| CN102221816A (en) * | 2010-04-19 | 2011-10-19 | 普天信息技术研究院有限公司 | Satellite time serving all-in-one machine and time serving method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107707325A (en) * | 2017-11-03 | 2018-02-16 | 深圳市银河风云网络系统股份有限公司 | Synchronisation control means and terminal control system |
| CN115280690A (en) * | 2020-03-10 | 2022-11-01 | 哲库科技有限公司 | Delay line based transceiver calibration |
| US11799509B2 (en) | 2020-03-10 | 2023-10-24 | Zeku Technology (Shanghai) Corp., Ltd. | Delay-line based transceiver calibration |
| CN115280690B (en) * | 2020-03-10 | 2024-03-19 | 哲库科技(上海)有限公司 | Methods, apparatus, systems, and media for delay line based transceiver calibration |
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| CN103188696B (en) | 2015-10-21 |
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Effective date of registration: 20200731 Address after: 610000 No.6 building, hi tech Incubation Park, north section of Tianfu Avenue, Chengdu, Sichuan Province Patentee after: CHENGDU NTS SOFTWARE Co.,Ltd. Address before: 610041, Sichuan high tech Zone, Chengdu Tianfu Road, South extension line, high-tech incubator Park, building 3, 6 Patentee before: CHENGDU NTS TECHNOLOGY Co.,Ltd. |