CN102271344A - Method for enhancing transmission distance for frequency shift repeater in time division duplex relay transmission mode - Google Patents
Method for enhancing transmission distance for frequency shift repeater in time division duplex relay transmission mode Download PDFInfo
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- CN102271344A CN102271344A CN2011100870311A CN201110087031A CN102271344A CN 102271344 A CN102271344 A CN 102271344A CN 2011100870311 A CN2011100870311 A CN 2011100870311A CN 201110087031 A CN201110087031 A CN 201110087031A CN 102271344 A CN102271344 A CN 102271344A
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Abstract
The invention discloses a method for enhancing transmission distance for a frequency shift repeater in a time division duplex relay transmission mode, comprising the following steps: 1. the intelligent antenna signal processing for a master station: processing an uplink signal and a downlink signal, causing the processed signal to successively pass through a radio frequency transmitting-receiving switching circuit and a filter after being processed by a power amplifier, emitting a signal of which the frequency is Fr by a relay antenna; converting the uplink relay signal into an FTD (Field Terminated Diode) signal of which the frequency is high; causing the FTD signal to pass through the radio frequency transmitting-receiving switching circuit and the filter; 2. intelligent antenna signal processing for a far-end station: processing the uplink signal and the downlink signal; after downlink emission signal power is amplified by processing the downlink emission signal via emission radio frequency processing, causing the downlink emission signal power to pass through the radio frequency transmitting-receiving switching circuit and the filter; emitting to a terminal from the radio frequency antenna; and after processing in far-end relay uplink, emitting the amplified signal power to the master station via the relay antenna. The method has the characteristics of low cost and transmission distance enhancement.
Description
Technical field
The invention belongs to mobile communication wireless and cover the elongation technology field, be used to increase the mobile communications network wireless coverage, for special remote districts (as distance village far away, isolated islands etc.) provide quick deployment, low-cost wireless to cover, the frequency-shift repeater that is specifically related to a kind of time division duplex relay transmission mode strengthens the method for transmission range.
Background technology
TDD is the abbreviation of time division duplex, the inter-process of TDD repeater mainly is filtering, shift frequency, power amplification and Synchronization Control, processing capacity is simple, at present, the common antenna of the general employing in existing repeater, adopt common antenna to comprise following shortcoming: the one, the distance range of transmission is limited, can't realize that transmission range requires scene far away; The 2nd, be the high reason of equipment manufacturing cost cost.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the object of the present invention is to provide a kind of method of frequency-shift repeater enhancing transmission range of time division duplex relay transmission mode, the shift frequency wireless base system that the present invention uses is made up of main website and remote terminal, main website is connected by wireless TDD relaying frequency signal with remote terminal, main website and remote terminal have the smart antenna signal processing function, the smart antenna that relay transmission is used between main website and the remote terminal adopts array antenna, between the main website of frequency-shift repeater and remote terminal, adopt the TDD duplex mode, identical frequency is adopted in up-downgoing, and it is low to have a cost, strengthen the characteristics of transmission range.
To achieve these goals, the technical solution used in the present invention is: a kind of frequency-shift repeater of time division duplex relay transmission mode strengthens the method for transmission range, may further comprise the steps:
The first, main website smart antenna signal processing.This step may further comprise the steps:
At first, downstream signal is handled: main website receives TD base station radio-frequency signal, its frequency is FTD, the base station radio-frequency signal is through filter filtering, then by the radio-frequency receiving-transmitting switching circuit, the frequency of TD downlink radio-frequency signal is transformed to a lower frequency Fr through frequency converter, the smart antenna signal processing receives the uplink relay signal and its AD is changed, calculate uplink relay signal arrival bearing, and finish down beam shaping, carry out gain controlling and Filtering Processing through entering the relaying downlink processing after the DA conversion, the signal of handling passes through the radio-frequency receiving-transmitting switching circuit after by power amplifier successively, filter is that the signal of Fr is launched by the relaying antenna with frequency at last.
Secondly, carry out the processing of upward signal, main website receives the uplink relay signal of remote terminal, and its frequency is Fr.Specifically comprise: the uplink relay signal is through filter filtering, then by the frequency conversion of radio-frequency receiving-transmitting switching circuit, with the frequency retrieval of uplink relay signal frequency to TD work, carrying out signal by LNA again amplifies, the uplink relay signal is after gain controlling, Filtering Processing are carried out in relaying reception processing, by frequency converter frequency is transformed to the higher FTD signal of frequency for the Fr repeating signal, the FTD signal sends to the TD base station by feeder with signal at last through radio-frequency receiving-transmitting switching circuit, filter.Upward signal need input to smart antenna signal processing function unit simultaneously, is used to differentiate arrival bearing.
The second, the signal processing of remote terminal smart antenna, this step comprises again:
At first, the processing of downstream signal, remote terminal is by the relaying antenna, receiving frequency is the downstream signal of the main website emission of Fdt, downstream signal is through the radio-frequency receiving-transmitting switching circuit, amplify through multiplexer and low noise again, carry out gain controlling and Filtering Processing by far-end relaying downlink processing, treated downlink relay signal is that the downlink relay signal frequency conversion of Fr is the downlink signal of FTD to frequency with frequency by frequency converter, by the emission radio frequency processing downlink signal power is amplified the back by radio-frequency receiving-transmitting switch and filter, be transmitted into terminal from radio-frequency antenna again.Upward signal need input to the intelligent signal processing functional unit simultaneously, is used to differentiate arrival bearing.
Secondly, upward signal is handled, remote terminal passes through radio-frequency antenna, filter, the radio-frequency receiving-transmitting switch, receive the upward signal of terminal emission, upward signal amplifies through the LNA low noise, handle by received RF again and carry out gain controlling, Filtering Processing, treated upward signal is that the up radiofrequency signal of FTD is converted to the uplink relay signal that frequency is Fr by frequency converter with frequency again, the upward signal that the smart antenna signal processing receives, and the uplink relay signal that receives is carried out AD change, calculate uplink relay signal arrival bearing, and finish down beam shaping, after the DA conversion, after entering that the far-end relaying is up and handling, by PA2 signal power is amplified the back and be transmitted into main website by the relaying antenna by duplexer 2.
The present invention is owing to adopt the wireless frequency-shift repeater up-downgoing of TDD relay transmission technology to adopt identical frequency.For adopting intelligent antenna technology, improve the transmission receiving gain by the wave beam inborn nature, improve the transmitting-receiving gain and be 8db, thereby reach the purpose of lifting relay transmission distance and signal transmission quality, have the advantages that cost is low, strengthen transmission range.
Description of drawings
Fig. 1 is an embodiment of the invention schematic diagram.
Fig. 2 is the theory diagram of main website 1 in the embodiment of the invention.
Fig. 3 is the theory diagram of remote terminal 2 in the embodiment of the invention.
Embodiment
Below in conjunction with embodiment and accompanying drawing the present invention is described in further detail.
Referring to Fig. 1,2,3, the shift frequency wireless base system that the present invention uses is made up of main website 1 and remote terminal 2, and main website 1 is connected by wireless TDD relaying frequency signal with remote terminal 2.Main website 1 and remote terminal 2 have the smart antenna signal processing function, and the smart antenna 3 that relay transmission is used between main website 1 and the remote terminal 2 adopts array antenna.Adopt the TDD duplex mode between the main website 1 of frequency-shift repeater and remote terminal 2, identical frequency is adopted in up-downgoing.The frequency-shift repeater that the present invention relates to a kind of time division duplex relay transmission mode strengthens the method for transmission range, may further comprise the steps:
The first, the signal processing of the smart antenna 3 of main website 1.This step may further comprise the steps:
At first, downstream signal is handled: main website 1 receives TD base station radio-frequency signal, its frequency is FTD, the base station radio-frequency signal is through filter filtering 4, then by radio-frequency receiving-transmitting switching circuit 5, the frequency of TD downlink radio-frequency signal is transformed to a lower frequency Fr through frequency converter 6, smart antenna 3 signal processing uplink relay signals and to its AD conversion, calculate uplink relay signal arrival bearing, and finish down beam shaping, carry out gain controlling and Filtering Processing through entering relaying downlink processing 7 after the DA conversion, the signal of handling passes through radio-frequency receiving-transmitting switching circuit 9 after by power amplifier 8 successively, filter 10 is that the signal of Fr is launched by relaying antenna 11 with frequency at last.
Secondly, carry out the processing of upward signal, main website 1 receives the uplink relay signal of remote terminal 2, and its frequency is Fr.Specifically comprise: the uplink relay signal is through filter filtering 10, then by 9 frequency conversions of radio-frequency receiving-transmitting switching circuit, with the frequency retrieval of uplink relay signal frequency to TD work, carrying out signal by LNA 12 again amplifies, the uplink relay signal is after gain controlling, Filtering Processing are carried out in relaying reception processing 13, by frequency converter 14 frequency is transformed to the higher FTD signal of frequency for the Fr repeating signal, the FTD signal sends to the TD base station by feeder with signal at last through radio-frequency receiving-transmitting switching circuit 5, filter 4.Upward signal need input to smart antenna 3 signal processing function unit simultaneously, is used to differentiate arrival bearing.
The second, the signal processing of the smart antenna 15 of remote terminal 2, this step comprises again:
At first, the processing of downstream signal, remote terminal 2 is by relaying antenna 16, receiving frequency is the downstream signal of main website 1 emission of Fdt, downstream signal is through radio-frequency receiving-transmitting switching circuit 17, amplify through multiplexer and low noise 18 again, carry out gain controlling and Filtering Processing by far-end relaying downlink processing 19, treated downlink relay signal is that the downlink relay signal frequency conversion of Fr is the downlink signal of FTD to frequency with frequency by frequency converter 20, by emission radio frequency processing 21 the downlink signal power is amplified the back by radio-frequency receiving-transmitting switch 22 and filter 24, be transmitted into terminal from radio-frequency antenna 23 again.Upward signal need input to smart antenna 3 signal processing function unit simultaneously, is used to differentiate arrival bearing.
Secondly, upward signal is handled, remote terminal 2 is by radio-frequency antenna 23, filter 24 and radio-frequency receiving-transmitting switch 22 receive the upward signal of terminal emission, upward signal amplifies through LNA low noise 25, handle 26 by received RF again and carry out gain controlling, Filtering Processing, treated upward signal is that the up radiofrequency signal of FTD is converted to the uplink relay signal that frequency is Fr by frequency converter 27 with frequency again, the upward signal that smart antenna 28 signal processing receive, and the uplink relay signal that receives is carried out AD change, calculate uplink relay signal arrival bearing, and finish down beam shaping, after the DA conversion, enter the far-end relaying up handle 29 handle after, by PA230 signal power is amplified the back by duplexer 2, relaying sky 16 is transmitted into main website 1.
Claims (1)
1. the frequency-shift repeater of a time division duplex relay transmission mode strengthens the method for transmission range, it is characterized in that, may further comprise the steps:
The first, main website smart antenna signal processing.This step may further comprise the steps:
At first, downstream signal is handled: main website receives TD base station radio-frequency signal, its frequency is FTD, the base station radio-frequency signal is through filter filtering, then by the radio-frequency receiving-transmitting switching circuit, the frequency of TD downlink radio-frequency signal is transformed to a lower frequency Fr through frequency converter, the smart antenna signal processing receives the uplink relay signal and its AD is changed, calculate uplink relay signal arrival bearing, and finish down beam shaping, carry out gain controlling and Filtering Processing through entering the relaying downlink processing after the DA conversion, the signal of handling passes through the radio-frequency receiving-transmitting switching circuit after by power amplifier successively, filter is that the signal of Fr is launched by the relaying antenna with frequency at last.
Secondly, carry out the processing of upward signal, main website receives the uplink relay signal of remote terminal, and its frequency is Fr.Specifically comprise: the uplink relay signal is through filter filtering, then by the frequency conversion of radio-frequency receiving-transmitting switching circuit, with the frequency retrieval of uplink relay signal frequency to TD work, carrying out signal by LNA again amplifies, the uplink relay signal is after gain controlling, Filtering Processing are carried out in relaying reception processing, by frequency converter frequency is transformed to the higher FTD signal of frequency for the Fr repeating signal, the FTD signal sends to the TD base station by feeder with signal at last through radio-frequency receiving-transmitting switching circuit, filter.Upward signal need input to smart antenna signal processing function unit simultaneously, is used to differentiate arrival bearing.
The second, the signal processing of remote terminal smart antenna, this step comprises again:
At first, the processing of downstream signal, remote terminal is by the relaying antenna, receiving frequency is the downstream signal of the main website emission of Fdt, downstream signal is through the radio-frequency receiving-transmitting switching circuit, amplify through multiplexer and low noise again, carry out gain controlling and Filtering Processing by far-end relaying downlink processing, treated downlink relay signal is that the downlink relay signal frequency conversion of Fr is the downlink signal of FTD to frequency with frequency by frequency converter, by the emission radio frequency processing downlink signal power is amplified the back by radio-frequency receiving-transmitting switch and filter, be transmitted into terminal from radio-frequency antenna again.Upward signal need input to the intelligent signal processing functional unit simultaneously, is used to differentiate arrival bearing.
Secondly, upward signal is handled, remote terminal passes through radio-frequency antenna, filter, the radio-frequency receiving-transmitting switch, receive the upward signal of terminal emission, upward signal amplifies through the LNA low noise, handle by received RF again and carry out gain controlling, Filtering Processing, treated upward signal is that the up radiofrequency signal of FTD is converted to the uplink relay signal that frequency is Fr by frequency converter with frequency again, the upward signal that the smart antenna signal processing receives, and the uplink relay signal that receives is carried out AD change, calculate uplink relay signal arrival bearing, and finish down beam shaping, after the DA conversion, after entering that the far-end relaying is up and handling, by PA2 signal power is amplified the back and be transmitted into main website by the relaying antenna by duplexer 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201110087031 CN102271344B (en) | 2011-04-07 | 2011-04-07 | Method for enhancing transmission distance for frequency shift repeater in time division duplex relay transmission mode |
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| CN 201110087031 CN102271344B (en) | 2011-04-07 | 2011-04-07 | Method for enhancing transmission distance for frequency shift repeater in time division duplex relay transmission mode |
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| CN102271344A true CN102271344A (en) | 2011-12-07 |
| CN102271344B CN102271344B (en) | 2013-12-25 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106992807A (en) * | 2017-05-17 | 2017-07-28 | 江苏亨鑫科技有限公司 | The signal relay system communicated for 5G |
| CN107919899A (en) * | 2017-12-27 | 2018-04-17 | 成都西科微波通讯有限公司 | Cloud relay communications system |
| CN111372262A (en) * | 2020-02-16 | 2020-07-03 | 山东华箭科工创新科技有限公司 | 5G remote communication relay equipment and communication method thereof |
| CN111866900A (en) * | 2020-06-28 | 2020-10-30 | 四川省大见通信技术有限公司 | Frequency shift mobile communication indoor microdistribution system, method and application |
| CN111866899A (en) * | 2020-06-28 | 2020-10-30 | 四川省大见通信技术有限公司 | Indoor microdistribution system and method for 5G mobile communication |
| CN112770333A (en) * | 2020-12-11 | 2021-05-07 | 武汉虹信科技发展有限责任公司 | 5G NR wireless distributed frequency shift system and frequency shift method |
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| CN111372262A (en) * | 2020-02-16 | 2020-07-03 | 山东华箭科工创新科技有限公司 | 5G remote communication relay equipment and communication method thereof |
| CN111866900A (en) * | 2020-06-28 | 2020-10-30 | 四川省大见通信技术有限公司 | Frequency shift mobile communication indoor microdistribution system, method and application |
| CN111866899A (en) * | 2020-06-28 | 2020-10-30 | 四川省大见通信技术有限公司 | Indoor microdistribution system and method for 5G mobile communication |
| CN112770333A (en) * | 2020-12-11 | 2021-05-07 | 武汉虹信科技发展有限责任公司 | 5G NR wireless distributed frequency shift system and frequency shift method |
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| CN102271344B (en) | 2013-12-25 |
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