CN102271344B - 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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- CN102271344B CN102271344B CN 201110087031 CN201110087031A CN102271344B CN 102271344 B CN102271344 B CN 102271344B CN 201110087031 CN201110087031 CN 201110087031 CN 201110087031 A CN201110087031 A CN 201110087031A CN 102271344 B CN102271344 B CN 102271344B
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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, for increasing the mobile communications network wireless coverage, for special remote districts (as distant village, isolated islands etc.) provide rapid 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 is mainly 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 reason that the equipment manufacturing cost cost is high.
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 of the present invention's application is comprised 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 between main website and remote terminal, relay transmission is used adopts array antenna, adopt the TDD duplex mode between the main website of frequency-shift repeater and remote terminal, up-downgoing adopts identical frequency, there is cost low, 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, comprises the following steps:
The first, main website smart antenna signal is processed.This step comprises the following steps:
At first, downstream signal is processed: 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 is processed and is received the uplink relay signal and its AD is changed, calculate uplink relay signal arrival bearing, and complete down beam shaping, gain and control and the filtering processing through entering the relaying downlink processing after DA conversion, the signal of processing passes through the radio-frequency receiving-transmitting switching circuit after by power amplifier successively, filter, the signal that is finally Fr by relay antenna by frequency is launched.
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, frequency by the frequency retrieval of uplink relay signal to TD work, carry out the signal amplification by LNA again, the uplink relay signal is after relay reception is processed the control that gains, filtering processing, by frequency converter, by frequency, be that the Fr repeating signal is transformed to the FTD signal that frequency is higher, the FTD signal, through radio-frequency receiving-transmitting switching circuit, filter, finally sends to the TD base station by feeder by signal.Upward signal need to input to smart antenna signal processing function unit simultaneously, for differentiating arrival bearing.
The second, the signal of remote terminal smart antenna is processed, and this step comprises again:
At first, the processing of downstream signal, remote terminal passes through relay antenna, the downstream signal of the main website emission that to receive frequency be Fr, downstream signal is through the radio-frequency receiving-transmitting switching circuit, pass through again multiplexer and low noise amplification, gain and control and the filtering processing by far-end relaying downlink processing, the downlink signal that the downlink relay signal frequency conversion that treated downlink relay signal is Fr by frequency converter by frequency is FTD to frequency, pass through radio-frequency receiving-transmitting switch and filter after by the emission radio frequency processing, the downlink signal power being amplified, be transmitted into terminal from radio-frequency antenna again.Upward signal need to input to the intelligent signal processing functional unit simultaneously, for differentiating arrival bearing.
Secondly, upward signal is processed, remote terminal passes through radio-frequency antenna, filter, the radio-frequency receiving-transmitting switch, receive the upward signal of terminal emission, upward signal is through the LNA low noise amplification, process by received RF the control that gains again, filtering is processed, the up radiofrequency signal that treated upward signal is FTD by frequency converter by frequency again is converted to the uplink relay signal that frequency is Fr, the smart antenna signal is processed the upward signal received, and the uplink relay signal received is carried out to the AD conversion, calculate uplink relay signal arrival bearing, and complete down beam shaping, after the DA conversion, after entering that the far-end relaying is up and being processed, be transmitted into main website by duplexer 2 by relay antenna after by PA2, signal power being amplified.
The present invention is owing to adopting the wireless frequency-shift repeater up-downgoing of TDD relay transmission technology to adopt identical frequency.For adopting intelligent antenna technology, improve and send receiving gain by the wave beam inborn nature, improve the transmitting-receiving gain for 8db, thereby reach the purpose that promotes relay transmission distance and signal transmission quality, have the advantages that cost is low, strengthen transmission range.
The accompanying drawing explanation
Fig. 1 is embodiment of the present invention schematic diagram.
The theory diagram that Fig. 2 is main website 1 in the embodiment of the present invention.
The theory diagram that Fig. 3 is remote terminal 2 in the embodiment of the present 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 of the present invention's application is comprised 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 between main website 1 and remote terminal 2, relay transmission is used adopts array antenna.Adopt the TDD duplex mode between the main website 1 of frequency-shift repeater and remote terminal 2, up-downgoing adopts identical frequency.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, comprises the following steps:
The first, the signal of the smart antenna 3 of main website 1 is processed.This step comprises the following steps:
At first, downstream signal is processed: 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 signals are processed the uplink relay signal and its AD are changed, calculate uplink relay signal arrival bearing, and complete down beam shaping, gain and control and the filtering processing through entering relaying downlink processing 7 after DA conversion, the signal of processing passes through radio-frequency receiving-transmitting switching circuit 9 after by power amplifier 8 successively, filter 10, the signal that is finally Fr by relay antenna 11 by frequency is launched.
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, frequency by the frequency retrieval of uplink relay signal to TD work, carry out the signal amplification by LNA 12 again, the uplink relay signal is after relay reception processing 13 gains control, filtering processing, by frequency converter 14, by frequency, be that the Fr repeating signal is transformed to the FTD signal that frequency is higher, the FTD signal, through radio-frequency receiving-transmitting switching circuit 5, filter 4, finally sends to the TD base station by feeder by signal.Upward signal need to input to smart antenna 3 signal processing function unit simultaneously, for differentiating arrival bearing.
The second, the signal of the smart antenna 28 of remote terminal 2 is processed, and this step comprises again:
At first, the processing of downstream signal, remote terminal 2 is by relay antenna 16, the downstream signal of main website 1 emission that to receive frequency be Fr, downstream signal is through radio-frequency receiving-transmitting switching circuit 17, through multiplexer and low noise 18, amplify again, gain and control and the filtering processing by far-end relaying downlink processing 19, the downlink signal that the downlink relay signal frequency conversion that treated downlink relay signal is Fr by frequency converter 20 by frequency is FTD to frequency, pass through radio-frequency receiving-transmitting switch 22 and filter 24 after by emission radio frequency processing 21, the downlink signal power being amplified, be transmitted into terminal from radio-frequency antenna 23 again.Upward signal need to input to smart antenna 3 signal processing function unit simultaneously, for differentiating arrival bearing.
Secondly, upward signal is processed, 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, process 26 controls that gain by received RF again, filtering is processed, the up radiofrequency signal that treated upward signal is FTD by frequency converter 27 by frequency again is converted to the uplink relay signal that frequency is Fr, smart antenna 28 signals are processed the upward signal received, and the uplink relay signal received is carried out to the AD conversion, calculate uplink relay signal arrival bearing, and complete down beam shaping, after the DA conversion, enter the far-end relaying up processed 15 processed after, pass through duplexer 2 after by PA229, signal power being amplified, 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, comprises the following steps:
The first, main website smart antenna signal is processed; This step comprises the following steps:
At first, downstream signal is processed: 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 is processed and is received the uplink relay signal and its AD is changed, calculate uplink relay signal arrival bearing, and complete down beam shaping, gain and control and the filtering processing through entering the relaying downlink processing after DA conversion, the signal of processing passes through the radio-frequency receiving-transmitting switching circuit after by power amplifier successively, filter, the signal that is finally Fr by relay antenna by frequency is launched,
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, frequency by the frequency retrieval of uplink relay signal to TD work, carry out the signal amplification by LNA again, the uplink relay signal is after relay reception is processed the control that gains, filtering processing, by frequency converter, by frequency, be that the Fr repeating signal is transformed to the FTD signal that frequency is higher, the FTD signal, through radio-frequency receiving-transmitting switching circuit, filter, finally sends to the TD base station by feeder by signal; Upward signal need to input to smart antenna signal processing function unit simultaneously, for differentiating arrival bearing;
The second, the signal of remote terminal smart antenna is processed, and this step comprises again:
At first, the processing of downstream signal, remote terminal passes through relay antenna, the downstream signal of the main website emission that to receive frequency be Fr, downstream signal is through the radio-frequency receiving-transmitting switching circuit, pass through again multiplexer and low noise amplification, gain and control and the filtering processing by far-end relaying downlink processing, the downlink signal that the downlink relay signal frequency conversion that treated downlink relay signal is Fr by frequency converter by frequency is FTD to frequency, pass through radio-frequency receiving-transmitting switch and filter after by the emission radio frequency processing, the downlink signal power being amplified, be transmitted into terminal from radio-frequency antenna again, upward signal need to input to the intelligent signal processing functional unit simultaneously, for differentiating arrival bearing,
Secondly, upward signal is processed, remote terminal passes through radio-frequency antenna, filter, the radio-frequency receiving-transmitting switch, receive the upward signal of terminal emission, upward signal is through the LNA low noise amplification, process by received RF the control that gains again, filtering is processed, the up radiofrequency signal that treated upward signal is FTD by frequency converter by frequency again is converted to the uplink relay signal that frequency is Fr, the smart antenna signal is processed the upward signal received, and the uplink relay signal received is carried out to the AD conversion, calculate uplink relay signal arrival bearing, and complete down beam shaping, after the DA conversion, after entering that the far-end relaying is up and being processed, be transmitted into main website by duplexer 2 by relay antenna after by PA2, signal power being amplified.
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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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| 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 |
| CN107919899B (en) * | 2017-12-27 | 2024-01-26 | 成都西科微波通讯有限公司 | Cloud relay communication 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 |
| 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 |
| 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 |
| CN112770333B (en) * | 2020-12-11 | 2023-04-14 | 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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| CN2772161Y (en) * | 2004-11-12 | 2006-04-12 | 福建电信科学技术研究院有限公司 | 3G mobile communicatino wireless direct amplifying station |
| CN101291164A (en) * | 2007-04-17 | 2008-10-22 | 大唐移动通信设备有限公司 | Intelligent antenna wave beam shaping method and baseband signal processor |
| CN101359946A (en) * | 2007-07-30 | 2009-02-04 | 大唐移动通信设备有限公司 | Method and apparatus for wave beam shaping |
| EP2256955A2 (en) * | 2009-05-27 | 2010-12-01 | Fujitsu Limited | Wireless relay device and wireless relay method |
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Patent Citations (6)
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|---|---|---|---|---|
| CN1457160A (en) * | 2002-12-31 | 2003-11-19 | 北京信威通信技术股份有限公司 | Direct transmitting station for synchronous CDMA system and its control |
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| EP2256955A2 (en) * | 2009-05-27 | 2010-12-01 | Fujitsu Limited | Wireless relay device and wireless relay method |
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