CN100372261C - Antenna allocation method used for highway radio covering - Google Patents
Antenna allocation method used for highway radio covering Download PDFInfo
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- CN100372261C CN100372261C CNB2004100801665A CN200410080166A CN100372261C CN 100372261 C CN100372261 C CN 100372261C CN B2004100801665 A CNB2004100801665 A CN B2004100801665A CN 200410080166 A CN200410080166 A CN 200410080166A CN 100372261 C CN100372261 C CN 100372261C
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Abstract
The present invention discloses an antenna allocation method used for highway radio covering. The present invention adopts a directional antenna to carry out the inverted direction radio covering, which leads an up signal and a down signal of the directional antenna to be treated according to the same area. When the up signal is treated, signals received by the directional antenna which carries out the inverted direction radio covering are combined and treated according to a main diversity mode. When the down signal is treated, the signal is divided into two signals which are the completely same, and the two signals are transmitted by the directional antenna which carries out the inverted direction covering. Because the present invention adopts the directional antenna to carry out the inverted direction covering, compared with an omnidirectional antenna, the gain of the antenna is increased, the radio covering range is improved, and simultaneously, because the up signal and the down signal of the directional antenna which carries out the inverted direction covering are treated according to the same area, the phenomenon that during the switching between areas, conversation easily fails is avoided.
Description
Technical field
The present invention relates to a kind of antenna allocation method, relate in particular to a kind of antenna allocation method that highway covers that is used for.
Background technology
In wireless communication system, the highway wireless coverage is a kind of more special application.In conventional environment is used, generally require the zone of wireless coverage to approach circle, and the zone of highway wireless coverage is narrow strip, as shown in Figure 1, also require along the overlay area of highway long as much as possible, then less demanding with the covering of highway vertical direction.
Because the particularity that the highway wireless coverage requires is carried out the highway wireless coverage in the prior art and mainly adopted two kinds of methods, method one is to adopt several omnidirectional antennas or splayed configuration antenna to carry out wireless coverage.The wireless coverage area schematic diagram of omnidirectional antenna as shown in Figure 2, the wireless coverage area and the directional antenna of splayed configuration antenna are similar, just this antenna gain is less, corresponding coverage is little.Circle is approached in the overlay area of omnidirectional antenna or splayed configuration antenna because the zone of highway wireless coverage is narrow strip, require long as much as possible along the wireless coverage area of highway, then less demanding with the wireless coverage of highway vertical direction.Therefore employed antenna amount is more when adopting omnidirectional antenna or splayed configuration antenna to carry out the highway wireless coverage, causes the utilance of antenna not high, and certain wasting of resources is arranged.
Method two is to utilize two directional antennas to carry out rightabout wireless coverage, and two antennas adhere to different sub-districts separately.The directional antenna that both direction is opposite covers schematic diagram as shown in Figure 3, because two antennas adhere to different sub-districts separately, when the user enters another antenna coverage areas from an antenna coverage areas, must carry out signal switches, when the user arrives cell boarder, because former cell base station is different with the carrier frequency of new cell base station, travelling carriage must be before receiving new signal of base station, interruption is communicated by letter with former base station, user's translational speed is than very fast on the highway, and when the user hightails original sub-district when entering a new sub-district, new sub-district may have little time to be user's assigns talk channel, at this moment will send out call drop phenomenon in the communication process, cause handoff failure.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of antenna allocation method that is used for the highway wireless coverage.This method provides big as far as possible coverage at the characteristics of highway wireless coverage, avoids the conversation call drop that causes owing to switching simultaneously.
For solving the problems of the technologies described above, the invention provides a kind of antenna allocation method that is used for the highway wireless coverage, adopt directional antenna to carry out the rightabout wireless coverage, comprising: the upward signal that the directional antenna that 1) will adopt rightabout to cover receives merges processing according to main diversity mode; 2) downstream signal is separated into two identical signals, sends from the directional antenna that adopts rightabout to cover.
The coverage of the directional antenna that the described rightabout of step 1) covers is overlapped.The directional antenna that described employing rightabout covers is that the directional antenna that two or described employing rightabout cover is four, and wherein two antennas are divided into one group, make it point to a direction, and two other antenna is divided into one group, makes its directed in opposite directions.
Described step 1) specifically comprises step: 11) directional antenna is sent into up RF processing unit with the signal that receives by duplexer and is carried out radio frequency processing; 12) signal of RF processing unit output adopts main diversity merging mode to import same uplink baseband processing unit; 13) the uplink baseband processing unit carries out search, the demodulation process of signal, carries out signal according to signal to noise ratio and merges, and gives the back level with the signal after merging and carries out respective handling.
Step 2) described Signal Separation is finished in the Base-Band Processing process or is finished in the radio frequency processing process.
The process of described Signal Separation specifically comprises: 21) downstream signal is admitted to the programmable logic device interface after handling through downgoing baseband; 22) described descending programmable logic device interface separates the signal into identical two parts, gives the first downlink radio frequency processing unit and the second downlink radio frequency processing unit respectively; 23) described first, second downlink radio frequency processing unit carries out the radio frequency processing of signal respectively, and the signal after will handling sends on the directional antenna that belongs to same sub-district by duplexer and launches.
The process of described Signal Separation specifically comprises: 31) carry out the Base-Band Processing of downstream signal, and the signal after will handling is given the downlink radio frequency processing unit; 32) carry out the radio frequency processing of downstream signal, and the signal after will handling is given power splitter; 33) radiofrequency signal of described power splitter after with radio frequency processing is divided into two parts, sends to duplexer respectively, delivers to antenna by described duplexer and launches.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention is owing to adopted directional antenna to carry out rightabout wireless coverage, compare with omnidirectional antenna, antenna gain is bigger, coverage improves, simultaneously because the uplink and downlink signals of the directional antenna that rightabout is covered is handled incidental call drop phenomenon when having avoided the minizone to switch according to same sub-district.
Description of drawings
Fig. 1 is a highway wireless coverage area schematic diagram;
Fig. 2 is the wireless coverage area schematic diagram of omnidirectional antenna;
Overlay area schematic diagram when two directional antennas of Fig. 3 carry out the rightabout wireless coverage;
Fig. 4 carries out theory diagram descending and that upward signal is handled for the present invention in the Base-Band Processing process;
Fig. 5 carries out theory diagram descending and that upward signal is handled for the present invention in the radio frequency processing process;
Fig. 6 is the flow chart of the method for the invention.
Embodiment
Cover in order to carry out valid wireless in the regional extent of strip, the present invention improves on the basis of prior art two.Because the coverage of the directional antenna that both direction is opposite belongs to different sub-districts, may cause handoff failure easily when therefore switching in the sub-district.In view of the above, the present invention adopts two directional antennas to carry out the opposite direction wireless coverage, differs on the coverage direction of two directional antennas of assurance near 180 degree, simultaneously, the uplink and downlink signals processing is treated according to same sub-district.In downstream signal is handled, separate the signal into two identical signals, go out from two antenna transmission; In upward signal is handled, the signal of two antennas is merged processing according to main diversity mode.Main diversity mode merges and refers to: in the signal of two antennas any one is appointed as main collection, another is as diversity, by the intensity of two signals or the ratio merging of signal to noise ratio are summed into a signal, to deliver to the back level and handle, main diversity mode merging is also referred to as the diversity merging usually.
Specifically, the method for the invention comprises three main steps, with reference to figure 6.Step 1 is carried out the antenna setting, and the strip area of coverage is provided with the directional antenna that rightabout covers, and the antenna coverage areas of described reverse setting is distributed on the strip tape; Step 2 and step 3 are Signal Processing steps; Wherein, step 2 will adopt the upward signal of the directional antenna reception of rightabout covering to merge processing according to main diversity mode; Step 3 is separated into two identical signals with downstream signal, sends from the directional antenna that adopts rightabout to cover.By described step 2,3, realized directional antenna is carried out the rightabout covering and the uplink and downlink signals of directional antenna is handled the demand of handling according to same sub-district.
Because the directivity of directional antenna, can on the strip region band that the antenna wireless that oppositely is provided with covers, produce and cover blind spot, promptly the wireless coverage of both direction antenna join the zone area coverage less, may influence actual communication efficiency, therefore, specifically carry out antenna when being provided with in step 1, the coverage of the directional antenna that described rightabout covers is overlapped, thereby eliminate described coverage hole.
Uplink and downlink signals is handled and is treated according to same sub-district, when therefore the area of coverage of the antenna of user from two directional antennas enters another antenna coverage, in downstream signal is handled, though the signal of descending reception is from different antennas, but because signal is identical, do not need to switch, kept downstream signal continuity spatially.In upward signal is handled, because user's most of the time is all at the area of coverage of some antennas, another antenna does not receive user's signal, when the user when the area of coverage of an antenna enters another antenna coverage, two antennas receive user's signal simultaneously, because the signal to two antennas adopts main diversity to merge mode, any one antenna has signal, can guarantee the normal process of uplink service; Because the up-downgoing processing is all treated according to same sub-district, avoided the call drop that causes owing to switching simultaneously.
Receive at two antennas of the present invention and to handle, only need with two antennas towards being arranged to opposite direction, base station received signal does not need to do special processing, handle getting final product according to two antenna diversity receptions.In the upward signal processing procedure, because user's most of the time is all at the area of coverage of some antennas, another antenna does not receive user's signal, and therefore overwhelming majority time user's signal only exists on an antenna, the processing gain problem that has not had two antennas to receive.In the downstream signal processing procedure, the present invention is separated into two duplicate signals with downstream signal, launches from two antennas respectively, guarantees that mobile phone can receive same signal in the coverage of two antennas.
The present invention is in downstream signal separating treatment process, can adopt and in Base-Band Processing, carry out Signal Separation or in radio frequency processing, carry out Signal Separation, can adopt different implementations according to using, respectively two kinds of processing modes be described below with cost.
When in Base-Band Processing, carrying out Signal Separation, corresponding signal replication need be become identical two parts, give different radio-frequency channels respectively, handle signal respectively two radio-frequency channels, giving antenna launches, this processing mode needs two RF processing units, and cost is higher relatively, but can guarantee the signal power of launching.The process of carrying out Signal Separation in Base-Band Processing generally is to be realized by FPGA (programmable logic device) interface.
Figure 4 shows that and in the Base-Band Processing process, carry out theory diagram descending and that upward signal is handled.
In the downstream signal processing procedure in Fig. 4, after signal is handled through downgoing baseband, descending FPGA interface separates the signal into identical two parts, give two different downlink radio frequency processing units respectively, after carrying out radio frequency processing respectively by two different downlink radio frequency processing units, signal has been sent on two directional antennas that belong to same sub-district by duplexer, is launched respectively by two directional antennas.
In the upward signal processing procedure in Fig. 4, the signal that two directional antennas receive is sent into separately up RF processing unit by duplexer separately, after two up RF processing units carry out radio frequency processing respectively to the received signal, adopt main diversity to merge mode signal is sent into the uplink baseband processing unit, through search, demodulation process, after according to signal to noise ratio signal being merged into one, give the back level and carry out respective handling.
When the RF processing unit place carries out Signal Separation, the base band place does not need to carry out special processing, only need a RF processing unit, signal is through after the radio frequency processing, pass through power splitter, radiofrequency signal is divided into two parts, giving two antennas respectively launches, processing can be saved cost like this, but because the rated power of a RF processing unit is fixed, after signal was divided into two parts, the output of the power of each antenna reduced half than above-mentioned carrying out in the Signal Separation mode in Base-Band Processing, and corresponding wireless coverage distance also can reduce.
Figure 5 shows that in radio frequency part and carry out theory diagram descending and that upward signal is handled.
After downstream signal among Fig. 5 is handled through downgoing baseband, give the downlink radio frequency processing unit, after the RF processing unit processing, signal is given power splitter, power splitter is divided into two parts with the radiofrequency signal of RF processing unit output, send to duplexer respectively, delivering to antenna by duplexer launches, because the rated power of a RF processing unit is fixed, after signal is divided into two parts, the power output of each antenna reduces half than above-mentioned carrying out in the Signal Separation mode in Base-Band Processing, corresponding wireless coverage distance also can reduce.
The processing procedure of the upward signal among Fig. 5 is identical with upward signal processing mode in the Base-Band Processing process, the signal that two directional antennas receive is sent into separately up RF processing unit by duplexer separately, after two up RF processing units carry out radio frequency processing respectively to the received signal, adopt main diversity to merge mode signal is sent into the uplink baseband processing unit, through search, demodulation process, after according to signal to noise ratio signal being merged into one, give the back level and carry out respective handling.
Also can adopt two antennas to improve gain respectively in each direction by diversity.
Cdma system has the function of supporting More Soft Handoff, so-called More Soft Handoff, for up, refer to the base station and receive two upward signals simultaneously, and in Base-Band Processing, two signals are merged into a signal according to signal to noise ratio, because two antenna modes are adopted usually to a Signal Processing in the base station, therefore two signals are merged, meaning that the base station can be supported the signal of four antennas merged handles, and so just two antennas can be divided into one group, makes direction of its sensing, two other antenna is divided into one group, makes it point to the another one direction.
In the upward signal processing procedure, the signal to four antennas merges processing simultaneously, because subscriber signal can appear on two antennas simultaneously, up processing has diversity gain, has improved up receiving sensitivity, and then improves the up-link wireless coverage;
In the downstream signal processing procedure, an optional transmission downstream signal gets final product in each group antenna, and the another one antenna does not send signal.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (9)
1. an antenna allocation method that is used for the highway wireless coverage adopts directional antenna to carry out the rightabout wireless coverage, it is characterized in that comprising:
1) will adopt the upward signal of the directional antenna reception of rightabout covering to merge processing according to main diversity mode;
2) downstream signal is separated into two identical signals, sends from the directional antenna that adopts rightabout to cover.
2. the antenna allocation method that is used for the highway wireless coverage according to claim 1 is characterized in that, the coverage of the directional antenna that the described employing rightabout of step 1) covers is overlapped.
3. the antenna allocation method that is used for the highway wireless coverage according to claim 1 is characterized in that, described step 1) specifically comprises step:
11) directional antenna is sent into up RF processing unit with the upward signal that receives by duplexer and is carried out radio frequency processing;
12) signal of described up RF processing unit output adopts main diversity mode to import same uplink baseband processing unit;
13) the uplink baseband processing unit carries out search, the demodulation process of signal, carries out signal according to signal to noise ratio and merges, and gives the back level with the signal after merging and carries out respective handling.
4. according to claim 1, the 2 or 3 described antenna allocation methods that are used for the highway wireless coverage, it is characterized in that: step 2) described downstream signal is separated in the Base-Band Processing process and finishes.
5. according to claim 1, the 2 or 3 described antenna allocation methods that are used for the highway wireless coverage, it is characterized in that: step 2) described downstream signal is separated in the radio frequency processing process and finishes.
6. the antenna allocation method that is used for the highway wireless coverage according to claim 4 is characterized in that, described downstream signal separating process specifically comprises:
21) downstream signal is admitted to the programmable logic device interface through after the Base-Band Processing;
22) described programmable logic device interface is separated into identical two parts with downstream signal, gives the first downlink radio frequency processing unit and the second downlink radio frequency processing unit respectively;
23) described first, second downlink radio frequency processing unit carries out the radio frequency processing of signal respectively, and the signal after will handling sends on the directional antenna that adopts rightabout to cover by duplexer and sends.
7. the antenna allocation method that is used for the highway wireless coverage according to claim 5 is characterized in that, described downstream signal separating process specifically comprises:
31) carry out the Base-Band Processing of downstream signal, and the signal after will handling is given the downlink radio frequency processing unit;
32) carry out the radio frequency processing of downstream signal, and give power splitter the downstream signal after the radio frequency processing;
33) downstream signal of described power splitter after with radio frequency processing is divided into two parts, sends to duplexer respectively, delivers to directional antenna by described duplexer and launches.
8. the antenna allocation method that is used for the highway wireless coverage according to claim 1 is characterized in that: the directional antenna that described employing rightabout covers is two.
9. the antenna allocation method that is used for the highway wireless coverage according to claim 1, it is characterized in that: the directional antenna that described employing rightabout covers is four, wherein two directional antennas are divided into one group, make it point to a direction, two other directional antenna is divided into one group, makes its directed in opposite directions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100801665A CN100372261C (en) | 2004-09-24 | 2004-09-24 | Antenna allocation method used for highway radio covering |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100801665A CN100372261C (en) | 2004-09-24 | 2004-09-24 | Antenna allocation method used for highway radio covering |
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| CN1753327A CN1753327A (en) | 2006-03-29 |
| CN100372261C true CN100372261C (en) | 2008-02-27 |
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| CNB2004100801665A Expired - Fee Related CN100372261C (en) | 2004-09-24 | 2004-09-24 | Antenna allocation method used for highway radio covering |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101335552B (en) * | 2007-06-26 | 2013-05-01 | 中兴通讯股份有限公司 | Strip type covered intelligent antenna implementing method and apparatus |
| CN101453739B (en) * | 2007-12-03 | 2011-05-11 | 中兴通讯股份有限公司 | Method for high way coverage using intelligent antenna |
| CN101895322B (en) * | 2009-05-21 | 2014-02-12 | 电信科学技术研究院 | Method and device for sending signal |
| CN102595432B (en) * | 2011-01-10 | 2014-10-08 | 中国移动通信集团设计院有限公司 | Indoor multisystem-shared uplink and downlink signal processing method and device for the same |
| CN103997750B (en) * | 2011-01-10 | 2017-11-14 | 中国移动通信集团设计院有限公司 | A kind of downlink signal processing method and equipment of indoor shared by multiple systems |
| CN104378767B (en) * | 2014-11-11 | 2019-03-26 | 上海华为技术有限公司 | A kind of cell configuring method and base station |
| CN111865354A (en) * | 2020-06-24 | 2020-10-30 | 深圳市纽瑞芯科技有限公司 | Ultra-wideband integrated circuit system adopting multiple directional antennas to enhance coverage |
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| US6366790B1 (en) * | 1998-06-23 | 2002-04-02 | Samsung Electronics Co., Ltd. | Multi-sectorized base transceiver station system |
| CN1299221A (en) * | 1999-12-06 | 2001-06-13 | 松下电器产业株式会社 | Rodio communication base station |
| CN1310557A (en) * | 2000-02-24 | 2001-08-29 | 信息产业部电信科学技术研究院 | Distributed intelligent antenna system |
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