CN101094032A - Radio signal coverage system - Google Patents
Radio signal coverage system Download PDFInfo
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- CN101094032A CN101094032A CN 200710028360 CN200710028360A CN101094032A CN 101094032 A CN101094032 A CN 101094032A CN 200710028360 CN200710028360 CN 200710028360 CN 200710028360 A CN200710028360 A CN 200710028360A CN 101094032 A CN101094032 A CN 101094032A
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Abstract
This system includes a repeater station (RS), a splitter/combiner (SC), a CATV passive distribution network (PDN) and an active relay (AR). Via CATV power divider, CATV main amplifier connects to one end of SC. RS receives the mobile communication signal (MCS) and transfers it to the other end of SC. SC mixes MCS with the CATV signal and transmits the mixed signal to AR through PDN. The mentioned AR includes a SC, a bidirectional amplifier and an antenna. One end of SC orderly connects to the bidirectional amplifier and the antenna. The beneficial effect of this invention is: it solves the problem that the coverage of mobile communication signal is poor inside buildings.
Description
Technical field
The present invention relates to the signal covering system, especially a kind of radio signal coverage system.
Background technology
Mobile communication GSM network is through for many years engineering construction, network size and service basically form, cooperate carrying out of a large amount of network optimization projects simultaneously, the feasible zone that has blind spot in the past, substantially all well covered as village, highway, bridge, tunnel, city office building etc., whole network index is obviously optimized.
The indoor covering project of carrying out in nearly 2 years makes the network coverage that new target arranged.The improvement of network quality also makes the client more and more higher to the requirement of speech, and especially the signal quality of residential block is particularly paid close attention to.For large-scale residential quarters, though major part has been built indoor covering system, but register one's residence and cover because a variety of causes be inconvenient to lay the special-purpose radio-frequency cable,, especially be embodied in the wireless signal covering of high level so the problem of signal difference can not effectively be solved.Network problem concentrates on because building stops the low covering that causes, low field intensity, low call completing rate, low quality, high cutting off rate etc.
Therefore, need a kind of new radio signal coverage system to solve above-mentioned problem.
Summary of the invention
The object of the present invention is to provide a kind of radio signal coverage system, the mobile communication signal that this system has solved in the building covers bad problem.
In order to solve the problems of the technologies described above, the technical solution used in the present invention comprises a kind of radio signal coverage system that adopts active repeater, described system comprises the repeater, divide mixer, cable TV (CATV) passive distribution network and active repeater, the dried CATV port that is connected to the branch mixer by the CATV power splitter of putting of CATV, the repeater reception is also amplified the GSM port that the mobile communication downlink signal transfers signals to the branch mixer, divide mixer that mobile communication signal is mixed with the CATV signal by cable TV (CATV) passive distribution Network Transmission to active repeater, described active repeater comprises the branch mixer, two-way amplifier and antenna, this minute, mixer one port connected two-way amplifier and antenna successively, carried out the indoor wireless signal by antenna and covered.Its up course of work is just opposite.
The technical solution used in the present invention also comprises: described active repeater power output should reach+10dBm, be added to by cable TV (CATV) passive distribution network active repeater mobile communication signal level-below the 30dBm.
The technical solution used in the present invention also comprises: mixer comprised high pass filter and low pass filter in described minute, and it closes road and shunt with GSM signal and CATV signal, and the insulation request of two paths of signals is greater than 30dB.
The technical solution used in the present invention also comprises: described high pass filter passband is 800～2500MHz, and differential loss is less than 3.0dB, and pass band is 50～750MHz, and differential loss is less than 3.0dB in the band.
The technical solution used in the present invention also comprises: described filter adopts 5 rank elliptic filters.
The technical solution used in the present invention also comprises: described two-way amplifier comprises duplexer, amplifier, filter, by the antenna emission, export by the DT end after uplink amplifies by the upward signal that antenna receives after the downlink amplification for the GSM downstream signal of two-way amplifier DT end input.
The technical solution used in the present invention also comprises: described system also comprises power splitter, and described power splitter is arranged on the repeater, divides between the mixer.
The technical solution used in the present invention also comprises: described system also comprises impedance transducer, and described impedance transducer is arranged on the repeater, divides between the mixer.
The technical scheme in addition that the present invention taked is a kind of signal covering system that adopts passive repeater, described system comprises the repeater, divides mixer, cable TV drop cable and passive repeater, catv network is connected to the CATV port of branch mixer by the CATV splitter, the repeater is connected to the GSM port of branch mixer, divide mixer that mobile communication signal is mixed by the cable TV drop cable with the CATV signal and be transferred to passive repeater, described passive repeater comprises branch mixer and antenna, carries out the indoor wireless signal by antenna and covers
Useful technique effect of the present invention is: system of the present invention has the expansion communication coverage area, improves the function of communication quality, and the uplink and downlink signal of GSM network is had suitable amplification, can not damage the base station when normally using; This system applies catv network transmits the speech quality that can obviously improve the high residential building indoor signal after the GSM signal covers; Divide mixer and passive repeater to be passive device in this system, need not power supply.Active repeater adopts and exchanges the AC220V power supply; 50 ohm of gsm systems and CATV system 75 ohms impedance match problems have been solved.
Feature of the present invention and advantage will be elaborated in conjunction with the accompanying drawings by embodiment.
Description of drawings
Fig. 1 is the access schematic diagram of radio signal coverage system of the employing active repeater of the embodiment of the invention;
Fig. 2 is to be the structural representation of radio signal coverage system of the employing active repeater of the embodiment of the invention;
Fig. 3 is the system level design drawing of radio signal coverage system of the employing active repeater of the embodiment of the invention;
Fig. 4 is the structural representation of branch mixer;
Fig. 5 is the structural representation of high pass filter;
Fig. 6 is the structural representation of low pass filter;
Fig. 7 is the active repeater schematic diagram;
Fig. 8 is the two-way amplifier structural representation;
Fig. 9 is the access schematic diagram of radio signal coverage system of the employing passive repeater of the embodiment of the invention;
Figure 10 is to be the structural representation of radio signal coverage system of the employing passive repeater of the embodiment of the invention;
Figure 11 is the system level design drawing of radio signal coverage system of the employing passive repeater of the embodiment of the invention.
Embodiment
The access way that being divided into of the radio signal coverage system of the embodiment of the invention adopts active repeater and adopt the access way of passive repeater.
Seeing also Fig. 1, is the access schematic diagram of radio signal coverage system of the employing active repeater of the embodiment of the invention.The radio signal coverage system of the embodiment of the invention comprises at least one repeater, divides mixer, active repeater, cable TV (CATV) passive distribution network.Also be provided with impedance transducer between the GSM port of repeater and branch mixer.The dried CATV port that is connected to the branch mixer by the CATV power splitter of putting of cable TV.The GSM﹠amp of mixer; The CATV port links to each other with cable TV (CATV) passive distribution network, each unit (room) in the building, and a port and the catv network subscriber box of family expenses active repeater join, and an other port is connected with television set.Active repeater comprises branch mixer, two-way amplifier and antenna, this minute mixer one end connect two-way amplifier and antenna successively, the other end is connected with television set, this minute mixer and two-way amplifier between also be provided with impedance transducer.The radio signal coverage system of the embodiment of the invention is provided with one or several building repeaters at residential building, by minute mixer mobile communication downlink signal feed-in catv network is mixed with the CATV signal, be sent in each man of resident family of each floor by cable TV (CATV) passive distribution network again, a family expenses repeater is set in each man of resident family, CATV signal that mixes that the family expenses repeater will be received and mobile communication signal carry out filtering and select the CATV signal and give television set, simultaneously the mobile communication downlink signal of selecting is amplified, carry out the covering of signal by built-in antenna, just opposite for its course of work of upward signal, the upward signal that sends by mobile phone through the family expenses repeater receive amplify and with deliver to cable TV (CATV) passive distribution network after the CATV signal mixes, the other end at cable TV (CATV) passive distribution network, be added to the repeater after dividing mixer that the mobile communication upward signal is separated, the repeater is amplified upward signal and is sent the base station to by antenna or optical fiber, just set up communication like this between mobile communication base station and the mobile phone, realized the covering of wireless signal.
Seeing also Fig. 2, is the structural representation of radio signal coverage system of the employing active repeater of the embodiment of the invention.At residential building an optical fiber repeater remote termination R1 is set, optical fiber repeater near-end machine (figure does not show) directly is coupled from the base station GSM signal, after Optical Fiber Transmission, arrive optical fiber repeater remote termination R1, by R1 mobile communication signal is amplified to enough power, by four power splitters signal is delivered to the GSM port of the branch mixer D1 of unit 1, unit 2, unit 3 and unit 4 then respectively.Be added to distributor after the dried amplification of CATV signal process CATV and distribute, be input to the CATV port of branch mixer D1 then respectively.Divide mixer D1 that mobile communication signal is mixed with the CATV signal, just mobile communication signal has been delivered to each resident family by the coaxial net of CATV like this, can not directly launch but signal is very weak.Also must a small-sized active repeater R2 be installed signal is amplified in resident family man+10dBm about, and carry out indoor covering by antenna.
Seeing also Fig. 3, is the system level design drawing of radio signal coverage system of the employing active repeater of the embodiment of the invention.The distributor of catv network, the power capacity of splitter etc. is little, therefore powerful GSM signal can not be added to the CATV distribution network, the cable TV signal level that television set receives is generally-50～-30dBm, can not cause interference in order to ensure mobile communication signal to TV signal, be added to by catv network that the level of the mobile communication signal of television set should control-below the 30dBm, this programme is chosen to be-30dBm.Draw by theoretical and on-the-spot test, the total losses of CATV distribution network are 50dB, therefore the power output of building repeater is defined as 50-30+10=+30dBm (wherein 10dB is the loss of power splitter), be about+20dBm through its power behind four power splitters and the mixer D1, can not cause damage the catv network parts.In order to guarantee indoor covering, the power output of active repeater should reach+10dBm, so the gain of active repeater is about+10+30=40dB.
See also Fig. 4, be the structural representation of minute mixer.Divide mixer to comprise high pass filter and low pass filter, main effect is GSM signal and CATV signal to be closed the road/along separate routes, the insulation request of two paths of signals prevents that greater than 30dB the GSM signal from entering television set, TV is produced disturb.The high pass filter passband is 800～2500MHz, and differential loss is less than 3.0dB, to the inhibition of 50～750MHz frequency band signals greater than 30dB.Pass band is 50～750MHz, in the band differential loss less than 3.0dB, to the inhibition of 880-960MHz frequency band signals greater than 30dB.Filter adopts 5 rank elliptic filters to realize that selected device is common capacitor and inductor.The structure of high pass filter as shown in Figure 5, the structure of low pass filter is as shown in Figure 6.
Figure 7 shows that the active repeater schematic diagram, active repeater comprises high pass filter, low pass filter, two-way amplifier and antenna.Close the road signal and transfer to high pass filter, low pass filter through the input of A port, behind low pass and high pass filter, signal is divided into CATV and GSM two-way, and the CATV signal is output as the B port.The GSM signal amplifies the back through integrated active repeater and launches by antenna.Filter, two-way amplifier, antenna all are integrated in the box body shown in Figure 7.Active repeater gain 40dB, the about 10dBm of peak power output.
Figure 8 shows that the two-way amplifier structural representation, two-way amplifier comprises duplexer, amplifier, filter.By the antenna emission, export by the DT end after uplink amplifies by the upward signal that antenna receives after the downlink amplification for the GSM downstream signal of two-way amplifier DT end input.Two-way amplifier plays the function of two-way amplification GSM signal.
Seeing also Fig. 9, is the access schematic diagram of radio signal coverage system of the employing passive repeater of the embodiment of the invention.The radio signal coverage system of the embodiment of the invention comprises at least one repeater, divides mixer, passive repeater, cable TV drop cable.Also be provided with impedance transducer between repeater and branch mixer one input.Cable TV network (CATV) is connected to another input of branch mixer by the CATV splitter.The output of branch mixer links to each other by the cable TV drop cable with the passive repeater in being arranged on user house.Passive repeater comprises branch mixer and antenna, divides between mixer and antenna to be provided with impedance transducer, divides another output of mixer to be connected with television set.The passive relay access scheme of the embodiment of the invention is provided with one or several indoor distributed systems at a residential building, in repeater of each storey setting, and by dividing mixer that the drop cable line of mobile communication signal feed-in catv network is mixed with the CATV signal, be sent in the man of resident family by the tv line of registering one's residence again, the antenna of one cover band signal separation function is set in man of resident family, will receives that the mobile communication signal that mixes with the CATV signal separates and undertaken by built-in antenna the covering of signal by minute mixer.
Seeing also Figure 10, is the structural representation of radio signal coverage system of the employing passive repeater of the embodiment of the invention.A middle power repeater R1 is set in the residential building building, finish the amplification of uplink and downlink signals by R1, by four power splitters signal is delivered to four unit (annotate: the building has n unit just to match the n power splitter) respectively then, and mobile communication signal has been delivered to each floor by distribution cable in indoor, at each floor a repeater R2 is installed again, if this floor has only one family need carry out the movable signal covering just at this floor user's cable TV CATV splitter and this user's the mixer D2 of serial connection between the CATV cable that registers one's residence, and repeater R2 is received the GSM port of this minute mixer D2.Movable signal has just been delivered in the user family like this, and the cable TV socket port in user family adds that one is with the small size antenna of CATV interface just can realize the covering of movable signal in user family.If having the family more than two need carry out movable signal, this floor covers, then need be at GSM power splitter of this storey setting, the signal of repeater R2 is carried out shunt, and close the road by minute mixer and cable TV signal then and deliver in each user family.
Seeing also Figure 11, is the radio signal coverage system level design drawing of the employing passive repeater of the embodiment of the invention.What CATV resident family drop cable all used is the SYWV-75-5 coaxial cable, the loss 12dB of its 50m under 950MHz as can be seen, general CATV drop cable length is no more than 25m, therefore its loss is 6dB, a floor has four～six families, transmitting power needs+the 10dBm of each household could satisfy the covering requirement, therefore be used for other power output of the repeater share of each floor six family and be+10 (transmitting power)+6 (cable loss)+8 (merit is divided loss)+3 (reservation loss)=27dBm, therefore the repeater that is used for each floor can be designed to the trunk amplifier that power output is 0.5W, and the gain of repeater can be decided to be 40dB.
In catv network, introduce the GSM signal, must consider the influence that GSM equipment and signal cause TV.Concerning catv network, after GSM equipment and signal were introduced, catv network had been introduced out of band signal, and is spuious in the band, and noise.
Require CATV signal carrier-to-noise ratio greater than 43dB (bandwidth 5.75MHz) in the CATV engineering design standard, the every carrier signal strength of CATV-30～-50dBm between, so when the end made an uproar less than-90dBm, the GSM signal did not have influence to catv network.In the GSM equipment that reality is introduced, band is outer, and (50～750MHz) noises are less than-120dBm, in the band (880～960MHz) noises are less than-60dBm because the buffer action of repeater filtering mixer, 880MHz～960MHz in-band noise to the intensity of TV port less than-90dBm.So introduce the carrier-to-noise ratio not significantly influence of gsm system to CATV.
GSM signal and CATV signal close the road in passive device, the intermodulation of mixer is less than-80dB, the GSM signal strength signal intensity is not more than 10dBm, the CATV signal is not more than-10dBm, find no intermodulation signal in the scope and produce can surveying in the actual test, its signal level is less than-90dBm, therefore the intermodulation signal of the two is to not influence of catv network, the intermodulation signal of GSM self drops into signal strength signal intensity in the CATV frequency range and find it also is less than-90dBm in test, introduce the spurious in band signal level in the CATV system, introduced behind the gsm system in summary less than-90dBm, to not influence of CATV.
After the CATV composite video signal is sent into television set, at first enter in the television set high-frequency tuner (being commonly called as tuner), after high frequency amplification and frequency conversion, form the intermediate-freuqncy signal of unified frequency, send into the vision intermediate frequency amplifying circuit.After three grades of intermediate frequencies amplifications of composite video signal (comprising image, sound accompaniment, synchronizing signal) through image channel, carry out detection through vision signal detector again, take out image, audio signal, be sent to video amplification appliance and sound channel respectively.After the picture signal amplification of sending into video amplifier circuit, realize the function of reproduced picture in the input picture tube; The audio signal of sending into sound channel promotes the function that loud speaker is realized playback sound after amplifying.So the GSM signal mainly is the dynamic range that influences television tuner.The GSM signal strength signal intensity is not more than 10dBm in the catv network, and after repeater closed path filter filtering, (880～960MHz) signal strength signal intensities were less than-20dBm to arrive the out of band signal of TV.Because the maximum input of television tuner gross power is greater than 0dBm, itself satisfy three beats of carrier combination than prerequisite greater than 54dB under, (880～960MHz) to the work of tuner and the not influence of demodulation of television set to introduce out of band signal less than-20dBm.
The above is a preferred embodiments of the present invention only, is not to be used to limit protection scope of the present invention.Anyly be familiar with those skilled in the art in the technical scope that the present invention discloses, the variation that can expect easily all should be encompassed within protection scope of the present invention.
Claims (9)
1, a kind of radio signal coverage system, it is characterized in that: described system comprises the repeater, divide mixer, cable TV CATV passive distribution network and active repeater, the dried input that is connected to the branch mixer by the CATV splitter of putting of CATV, the repeater receives another input that mobile communication signal transfers signals to the branch mixer, divide mixer that mobile communication signal is mixed with the CATV signal by cable TV CATV passive distribution Network Transmission to active repeater, described active repeater comprises the branch mixer, two-way amplifier and antenna, divide mixer one end to connect two-way amplifier and antenna successively, carry out the indoor wireless signal by antenna and cover.
2, the radio signal coverage system of employing active repeater as claimed in claim 1, it is characterized in that: described family expenses repeater power output should reach+10dBm, be added to by cable TV CATV passive distribution network active repeater mobile communication signal level-below the 30dBm.
3, the radio signal coverage system of employing active repeater as claimed in claim 1, it is characterized in that: mixer comprised high pass filter and low pass filter in described minute, it closes road and shunt with GSM signal and CATV signal, and the insulation request of two paths of signals is greater than 30dB.
4, the radio signal coverage system of employing active repeater as claimed in claim 3 is characterized in that: described high pass filter passband is 800～2500MHz, and differential loss is less than 3.0dB, and pass band is 50～750MHz, and differential loss is less than 3.0dB in the band.
5, as the radio signal coverage system of claim 3 or 4 described employing active repeaters, it is characterized in that: described filter adopts 5 rank elliptic filters.
6, the radio signal coverage system of employing active repeater as claimed in claim 1, it is characterized in that: described two-way amplifier comprises duplexer, amplifier, filter, by the antenna emission, export by the DT end after uplink amplifies by the upward signal that antenna receives after the downlink amplification for the GSM downstream signal of two-way amplifier DT end input.
7, the radio signal coverage system of employing active repeater as claimed in claim 1 is characterized in that: described system also comprises power splitter, and described power splitter is arranged on the repeater, divides between the mixer.
8, the radio signal coverage system of employing active repeater as claimed in claim 1 is characterized in that: described system also comprises impedance transducer, and described impedance transducer is arranged on the repeater, divides between the mixer.
9, a kind of radio signal coverage system, it is characterized in that: described system comprises the repeater, divides mixer, cable TV drop cable and passive repeater, catv network is connected to the CATV port of branch mixer by the CATV splitter, the repeater is connected to the GSM port of branch mixer, divide mixer that mobile communication signal is mixed by the cable TV drop cable with the CATV signal and be transferred to passive repeater, described passive repeater comprises branch mixer and antenna, carries out the indoor wireless signal by antenna and covers.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710028360 CN101094032A (en) | 2007-05-31 | 2007-05-31 | Radio signal coverage system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710028360 CN101094032A (en) | 2007-05-31 | 2007-05-31 | Radio signal coverage system |
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| CN101094032A true CN101094032A (en) | 2007-12-26 |
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| CN101795162A (en) * | 2010-01-19 | 2010-08-04 | 国家广播电影电视总局广播科学研究院 | Method for measuring, calculating and evaluating signal covering quality of digital single frequency network |
| CN101959206A (en) * | 2009-07-20 | 2011-01-26 | 中兴通讯股份有限公司 | Method and system for realizing wireless communication signal coverage through CATV cable |
| CN102045533A (en) * | 2009-10-19 | 2011-05-04 | 星辰先创通信系统(厦门)有限公司 | Method for implementing indoor coverage of television signals by using indoor mobile communication distribution system |
| CN102082599A (en) * | 2011-01-19 | 2011-06-01 | 华为终端有限公司 | Method, device and system for amplifying radio signals |
| CN102215495A (en) * | 2010-04-07 | 2011-10-12 | 清华大学 | System for enhancing indoor signal intensity of mobile terminal in wireless communication |
| CN102223162A (en) * | 2011-05-18 | 2011-10-19 | 中国联合网络通信集团有限公司 | Combiner/divider, and method and system for covering mobile signals of elevator |
| CN103401509A (en) * | 2013-07-03 | 2013-11-20 | 吴江市同心电子科技有限公司 | Multichannel low noise amplifier |
| CN103532511A (en) * | 2013-10-08 | 2014-01-22 | 桂林市思奇通信设备有限公司 | Combiner with divider function |
| CN104902211A (en) * | 2015-06-25 | 2015-09-09 | 公安部第三研究所 | System for realizing 4G signal deep coverage based on radio and television platform coaxial cable |
| CN105680906A (en) * | 2016-03-25 | 2016-06-15 | 苏州市职业大学 | Broadcast television network broadband bilateral amplifier |
| CN108886405A (en) * | 2016-08-22 | 2018-11-23 | 华为技术有限公司 | A kind of method, equipment and the system of signal filtering |
| CN109818665A (en) * | 2017-11-17 | 2019-05-28 | 上海金阵半导体科技有限公司 | Wireless signal expansion system and wireless signal extension head end and terminal |
| WO2020029309A1 (en) * | 2018-08-07 | 2020-02-13 | 深圳市达驰通信有限公司 | Signal amplifier of multi-antenna system |
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- 2007-05-31 CN CN 200710028360 patent/CN101094032A/en active Pending
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| CN101959206A (en) * | 2009-07-20 | 2011-01-26 | 中兴通讯股份有限公司 | Method and system for realizing wireless communication signal coverage through CATV cable |
| CN101959206B (en) * | 2009-07-20 | 2015-06-03 | 中兴通讯股份有限公司 | Method and system for realizing wireless communication signal coverage through CATV cable |
| CN102045533B (en) * | 2009-10-19 | 2014-06-04 | 星辰先创通信系统(厦门)有限公司 | Method for implementing indoor coverage of television signals by using indoor mobile communication distribution system |
| CN102045533A (en) * | 2009-10-19 | 2011-05-04 | 星辰先创通信系统(厦门)有限公司 | Method for implementing indoor coverage of television signals by using indoor mobile communication distribution system |
| CN101795162A (en) * | 2010-01-19 | 2010-08-04 | 国家广播电影电视总局广播科学研究院 | Method for measuring, calculating and evaluating signal covering quality of digital single frequency network |
| CN101795162B (en) * | 2010-01-19 | 2013-09-04 | 国家广播电影电视总局广播科学研究院 | Method for measuring, calculating and evaluating signal covering quality of digital single frequency network |
| CN102215495A (en) * | 2010-04-07 | 2011-10-12 | 清华大学 | System for enhancing indoor signal intensity of mobile terminal in wireless communication |
| CN102082599A (en) * | 2011-01-19 | 2011-06-01 | 华为终端有限公司 | Method, device and system for amplifying radio signals |
| CN102223162A (en) * | 2011-05-18 | 2011-10-19 | 中国联合网络通信集团有限公司 | Combiner/divider, and method and system for covering mobile signals of elevator |
| CN102223162B (en) | 2011-05-18 | 2013-11-20 | 中国联合网络通信集团有限公司 | Combiner/divider, and method and system for covering mobile signals of elevator |
| CN103401509A (en) * | 2013-07-03 | 2013-11-20 | 吴江市同心电子科技有限公司 | Multichannel low noise amplifier |
| CN103532511A (en) * | 2013-10-08 | 2014-01-22 | 桂林市思奇通信设备有限公司 | Combiner with divider function |
| CN103532511B (en) * | 2013-10-08 | 2016-11-16 | 桂林市思奇通信设备有限公司 | A kind of combiner with splitter functionality |
| CN104902211A (en) * | 2015-06-25 | 2015-09-09 | 公安部第三研究所 | System for realizing 4G signal deep coverage based on radio and television platform coaxial cable |
| CN105680906A (en) * | 2016-03-25 | 2016-06-15 | 苏州市职业大学 | Broadcast television network broadband bilateral amplifier |
| CN108886405A (en) * | 2016-08-22 | 2018-11-23 | 华为技术有限公司 | A kind of method, equipment and the system of signal filtering |
| CN108886405B (en) * | 2016-08-22 | 2020-04-21 | 华为技术有限公司 | Signal filtering method, device and system |
| CN109818665A (en) * | 2017-11-17 | 2019-05-28 | 上海金阵半导体科技有限公司 | Wireless signal expansion system and wireless signal extension head end and terminal |
| CN109818665B (en) * | 2017-11-17 | 2022-03-18 | 上海金阵半导体科技有限公司 | Wireless signal extension system, wireless signal extension head end and terminal |
| WO2020029309A1 (en) * | 2018-08-07 | 2020-02-13 | 深圳市达驰通信有限公司 | Signal amplifier of multi-antenna system |
| US11095332B2 (en) | 2018-08-07 | 2021-08-17 | Shenzhen Dachi Communication Co., Ltd | Signal amplifier of multi-antenna system |
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