CN1394093A - Intelligent distributed antenna system of microcellular base station for digital mobile communication - Google Patents
Intelligent distributed antenna system of microcellular base station for digital mobile communication Download PDFInfo
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- CN1394093A CN1394093A CN 01114121 CN01114121A CN1394093A CN 1394093 A CN1394093 A CN 1394093A CN 01114121 CN01114121 CN 01114121 CN 01114121 A CN01114121 A CN 01114121A CN 1394093 A CN1394093 A CN 1394093A
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- signal
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Abstract
The invention discloses the intelligent distributed antenna system in the micro cell base station of the digital mobile communication. The down link of the main device receives the signal of the base station through the antenna or the radio frequency cable. The signal of the down link frequency band 935-960 MH is selected through the duplexer, passing the magnification, filter, entering the carrier frequency selection. Two selected relevant base stations transmit the signal on the carrier frequency, with power amplification being carried out respectively. The signal combined in two routes in output through the duplexer. Finally, the signal is transmitted from the antanna or connected to the radio frequency cable to the relevant area covered by the distributed antenna system. The up link (890-915 MHz signal) is from mobile phone to the base station.
Description
The invention belongs to communication technical field, particularly a kind of intelligent distributed antenna system of microcellular base station for digital mobile communication is applied to GSM/CDMA mobile communication network optimization field.
In the GSM/CDMA cell mobile communication systems, radio wave is owing to be subjected to the influence of terrain and its features or building, existence causes signal attenuation by factors such as shadow effect, multipath interference, a little less than in its coverage, signal occurring or the blind area of no signal, typical in tunnel, high-rise inside, garage and underpass etc.The high traffic of hot zones also can't well be absorbed, result of the above problems, domestic employing GSM/CDMA mobile communication microcell base station technology, but microcell base station transmitting power less (about 2W), so covering radius is also less, be typically 150 meters, it is too intensive that microcell base station is installed, and can cause frequent switching of signal and the price of microcell base station is very expensive.
In view of the foregoing, the object of the present invention is to provide a kind ofly cover, improve the quality, improve call completing rate, reduce the weak signal broken string enlarging, intelligent distributed antenna system of microcellular base station for digital mobile communication that raising network index, increase traffic carrying capacity have very great help.
The object of the present invention is achieved like this: the present invention mainly is evenly distributed to base station signal by power amplification unit, control unit, radio frequency cable (optical cable), power divider, coupler and domestic aerial each place in required covering place.
Main equipment of the present invention is formed full duplex work by two links of uplink and downlink.Down link receives the microcell base station signal from donor antenna or radio frequency cable, select downstream bands 935-960MHz signal through duplexer, amplify through low noise amplifier, again through band-pass filter, enter GSM carrier frequency selector, select the base station CF signal of two correspondences, by linear power amplifier two signals are carried out power amplification respectively, close Lu Houzai and export by duplexer, every carrier frequency+30dBm, signal is launched by retransmitting antenna, or connects radio frequency cable to distributed antenna system and cover the relevant range.In like manner, up link receives mobile telephone signal from retransmitting antenna or radio frequency cable, select upstream band 890-915MHz signal through duplexer, amplify through low noise amplifier, again through bandpass filter filtering filtering, enter GSM carrier frequency selector, select the base station CF signal of two correspondences, by linear power amplifier two signals are carried out power amplification respectively, close Lu Houzai and export by duplexer, every carrier frequency+30dBm, signal is launched by donor antenna, or connects radio frequency cable to main microcell base station.Control unit is to the control of system unit, adopts software and radio technique, promptly finishes wireless function with software, and to the beam forming of radio frequency band, transmitting power, antenna, the high programmability by software is provided with.
The feature of software and radio technique is: in architecture, the as close as possible antenna end in the position of wideband A/D/A converter is finished wireless function with software, and it can support multiple function with a kind of hardware platform.Software radio has whole programmability, comprises programmable radio frequency frequency band, channel access module and Channel Modulation etc.
Main equipment of the present invention can provide communication interface and soft communication agreement, after programming, can directly communicate with by interface, realizes monitoring and control.
The present invention has remedied the deficiency of microcell base station greatly, has solved indoor blind zone problem, and indoor mobile communication speech quality, network quality, power system capacity are improved a lot.In high-rise, part is improved because of receiving aspects such as the easy call drop, broken string, the switching that cause from multidirectional mixed and disorderly unstable signal get nowhere.Intelligent distributed antenna system covers, improves the quality, improves call completing rate for enlarging, reduces the weak signal broken string, raising network index, increase traffic carrying capacity are very helpful.The present invention is sharing outdoor traffic, increasing network capacity, indoor traffic is cut much ice in indoor absorption, minimizing co-channel interference also as a kind of dilatation means.Therefore, the present invention is for improving commmunication company's image, for the user provides better more perfect communication service whenever and wherever possible, enhances competitiveness, increases occupation rate of market and have very big meaning.
Software and radio technique among the present invention adopts algorithm parallel and that order is cut apart to obtain desired disposal ability, and it requires digital processing speed faster, must utilize multiple processing to share work.Its advance is: the concrete direction of wireless signal guide, make the transmission of the utilization of radio-frequency spectrum and signal more effective.Using advanced technology mainly is switched-beam and adaptive space digital processing technology.The smart antenna of application of beam switch technology be on the basis of distinguishing to the user side to sending a plurality of wave beams, follow the tracks of the mobile subscriber according to the signal strength signal intensity of measuring each wave beam, can when the mobile subscriber moves, change wave beam one by one.Wave beam is divided into many narrow wave energy signal is strengthened, so can suppress to disturb, significantly improve power system capacity well.Adopt software approach to realize beam shaping, use software design to finish adaptive algorithm and upgrade, can increase the flexibility of system not changing under the system hardware configuration prerequisite.
Main equipment technical indicator of the present invention:
| Frequency range | Up 890-915MHz, descending 935-960MHz | |
| Duplex Spacing | ????????????????45?MHz | |
| Noise factor | ????????????????≤4dB | |
| Overall gain | ????????????????≥90dB | |
| Gain adjustment range | ????????????????≥30dB | |
| Gain is adjusted linear | ????-16dB | ????±1.6dB |
| ????-22dB | ????±2.2dB | |
| ????-30dB | ????±3dB | |
| Time delay | ?????????????≤6μs | |
| Peak power output | ?????????????30dBm±3dBm | |
| Intermodulation suppresses | ?????????????≤-36dBm | |
| Spurious emissions | ????9KHz-1GHz | ????≤-36dBm |
| ????1GHz-12.75GHz | ????≤-30dBm | |
| Be with outer gain characteristic | ????±400KHz | ????≤50dBm |
| ????±600KHz | ????≤40dBm | |
| ????±1000KHz | ????≤35dBm | |
| Frequency stability | ?????????????≤±2.5ppm | |
| Supply power voltage | ?????????????AC220V | |
Main equipment of the present invention is when national the Radio Management Commission detection system equipment, and every index all is better than state quota, adopts software and radio technique to realize that the intelligent distribution antenna also belongs to initiative at home.
Further specify the present invention and embodiment below in conjunction with accompanying drawing.
Fig. 1 is a main equipment theory diagram of the present invention.
Number in the figure is as follows: 1, up link (890-915MHz); 2, down link (935-960MHz); 3, duplexer (DUP); 4, low noise amplifier (LNA); 5, linear power amplifier (PA); 6, band pass filter (BPF); 7, donor antenna (ANT.BS); 8, retransmitting antenna (ANT.MS); 9, carrier frequency is selected (GSMCS); 10, control unit (CONUNIT); 11, radio frequency cable; 12, base station; 13, mobile phone.
As shown in Figure 1, main equipment of the present invention is formed full duplex work by two links of uplink and downlink 1,2.Down link 2 receives microcell base station 12 signals from donor antenna 7 or radio frequency cable 11, select downstream bands 935-960MHz signal through duplexer 3, amplify through low noise amplifier 4, again through band pass filter 6 filtering, enter GSM carrier frequency selector 9, select the base station CF signal of two correspondences, carry out power amplification respectively, close Lu Houzai by 5 pairs two signals of linear power amplifier by duplexer 3 outputs, every carrier frequency+30dBm, signal is by retransmitting antenna 8 emission, or connects radio frequency cable to distributed antenna system and cover the relevant range.In like manner, up link 1 receives mobile phone 13 signals from retransmitting antenna 8 or radio frequency cable 11, select upstream band 890-915MHz signal through duplexer 3, amplify through low noise amplifier 4, again through band pass filter 6 filtering, enter GSM carrier frequency selector 9, select the base station CF signal of two correspondences, carry out power amplification respectively, close Lu Houzai by 5 pairs two signals of linear power amplifier by duplexer 3 outputs, every carrier frequency+30dBm, signal is launched by donor antenna 7, or connects radio frequency cable 11 to main microcell base station 12.Software and radio technique is adopted in the control of 10 pairs of system units of control unit, promptly finishes wireless function with software, can be to the beam forming of radio frequency band, transmitting power, antenna, and the high programmability by software is provided with.
Claims (2)
1, a kind of intelligent distributed antenna system of microcellular base station for digital mobile communication, mainly base station signal is evenly distributed to each place in required covering place by power amplification unit, control unit, radio frequency cable (optical cable), power divider, coupler and domestic aerial, it is characterized in that: main equipment is formed full duplex work by two links of uplink and downlink; Described down link receives the microcell base station signal from donor antenna or radio frequency cable, select downstream bands 935-960MHz signal through duplexer, through low noise amplifier amplification, band-pass filter, enter GSM carrier frequency selector, select the base station CF signal of two correspondences, by linear amplifier two signals are carried out power amplification respectively, close Lu Houzai and export by duplexer, every carrier frequency+30dBm, signal is launched by retransmitting antenna, or connects radio frequency cable to distributed antenna system and cover the relevant range; Described up link receives mobile telephone signal from retransmitting antenna or radio frequency cable, select upstream band 890-915MHz signal through duplexer, through low noise amplifier amplification, band-pass filter, enter the carrier frequency selector, select the base station CF signal of two correspondences, two signals are carried out power amplification respectively, close Lu Houzai and export every carrier frequency+30dBm by duplexer by linear amplifier, signal is launched by donor antenna, or connects radio frequency cable to main microcell base station; Described control unit is to the control of system unit, adopts software and radio technique, promptly finishes wireless function with software, can be to the beam forming of radio frequency band, transmitting power, antenna, and the high programmability by software is provided with.
2, according to the described intelligent distributed antenna system of microcellular base station for digital mobile communication of claim 1, it is characterized in that: the software and radio technique that is adopted in the control unit, in architecture, the as close as possible antenna end in the position of wideband A/D/A converter, finish wireless function with software, it can support multiple function with a kind of hardware platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01114121 CN1394093A (en) | 2001-06-22 | 2001-06-22 | Intelligent distributed antenna system of microcellular base station for digital mobile communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01114121 CN1394093A (en) | 2001-06-22 | 2001-06-22 | Intelligent distributed antenna system of microcellular base station for digital mobile communication |
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| Publication Number | Publication Date |
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| CN1394093A true CN1394093A (en) | 2003-01-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 01114121 Pending CN1394093A (en) | 2001-06-22 | 2001-06-22 | Intelligent distributed antenna system of microcellular base station for digital mobile communication |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100344189C (en) * | 2004-11-10 | 2007-10-17 | 郑长春 | 3G mobile communication network base station up-down power amplifying march-past combination unit |
| CN102014400A (en) * | 2010-07-27 | 2011-04-13 | 京信通信系统（中国）有限公司 | Mobile communication coverage distribution system and coupling radiating elements in corridor |
| CN104508984A (en) * | 2012-07-21 | 2015-04-08 | 奥迪股份公司 | Mobile wireless device for a motor vehicle, and method for operating the mobile wireless device |
| CN101965567B (en) * | 2008-02-25 | 2015-06-03 | 吉林克斯公司 | Partial reconfiguration of physical layer based on wireless network information |
| US9635708B2 (en) | 2012-07-21 | 2017-04-25 | Audi Ag | Circuit arrangement for a mobile communications unit of a motor vehicle, motor vehicle and method for operating a circuit arrangement |
| CN108352891A (en) * | 2015-11-17 | 2018-07-31 | 威尔逊电子有限责任公司 | Honeycomb signal augmentor with multiple signal chains |
-
2001
- 2001-06-22 CN CN 01114121 patent/CN1394093A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100344189C (en) * | 2004-11-10 | 2007-10-17 | 郑长春 | 3G mobile communication network base station up-down power amplifying march-past combination unit |
| CN101965567B (en) * | 2008-02-25 | 2015-06-03 | 吉林克斯公司 | Partial reconfiguration of physical layer based on wireless network information |
| CN102014400A (en) * | 2010-07-27 | 2011-04-13 | 京信通信系统（中国）有限公司 | Mobile communication coverage distribution system and coupling radiating elements in corridor |
| CN102014400B (en) * | 2010-07-27 | 2013-04-10 | 京信通信系统（中国）有限公司 | Mobile communication coverage distribution system and coupling radiating elements in corridor |
| CN104508984A (en) * | 2012-07-21 | 2015-04-08 | 奥迪股份公司 | Mobile wireless device for a motor vehicle, and method for operating the mobile wireless device |
| US9635708B2 (en) | 2012-07-21 | 2017-04-25 | Audi Ag | Circuit arrangement for a mobile communications unit of a motor vehicle, motor vehicle and method for operating a circuit arrangement |
| CN104508984B (en) * | 2012-07-21 | 2018-03-20 | 奥迪股份公司 | Method for the mobile communication equipment of automobile and for operating mobile communication equipment |
| US10181865B2 (en) | 2012-07-21 | 2019-01-15 | Audi Ag | Mobile wireless device for a motor vehicle, and method for operating the mobile wireless device |
| CN108352891A (en) * | 2015-11-17 | 2018-07-31 | 威尔逊电子有限责任公司 | Honeycomb signal augmentor with multiple signal chains |
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