CN103873399A - Signal interference processing method and apparatus, and relay device - Google Patents
Signal interference processing method and apparatus, and relay device Download PDFInfo
- Publication number
- CN103873399A CN103873399A CN201210531488.1A CN201210531488A CN103873399A CN 103873399 A CN103873399 A CN 103873399A CN 201210531488 A CN201210531488 A CN 201210531488A CN 103873399 A CN103873399 A CN 103873399A
- Authority
- CN
- China
- Prior art keywords
- signal
- antenna
- power
- interference
- module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
- H04B7/0842—Weighted combining
- H04B7/086—Weighted combining using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03891—Spatial equalizers
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Mobile Radio Communication Systems (AREA)
- Noise Elimination (AREA)
- Radio Relay Systems (AREA)
Abstract
The embodiments of the invention provide a signal interference processing method and apparatus, and a relay device. The signal interference processing apparatus comprises a power distribution module, an interference reconstruction module and a power synthesis module, wherein the power distribution module is used for obtaining a first signal to be sent by a first signal, separating a second signal of first set power from the first signal, and inputting the second signal to the interference reconstruction module; the interference reconstruction module is used for the second signal to generate an interference offset signal and inputting the interference offset signal to the power synthesis module; and the power synthesis module is used for performing interference offsetting on a third signal received by a second antenna by use of the interference offset signal, such that the interference to the signal received by the second antenna from the signal emitted by the first antenna is avoided, and at the same time, the frequency spectrum utilization efficiency is prevented from being decreased when a time division mode or a frequency division mode is employed.
Description
Technical field
The embodiment of the present invention relates to the communication technology, relates in particular to a kind of signal and disturbs processing method, device and trunking.
Background technology
In current base station system, base station is sent to core net by data by netting twine, but, in the place that there is no cable resource or inconvenient laying-out, the such as landform such as Gobi desert, high mountain, or, for example equal time urgent scene in disaster area after shake, lay fiber optic network reality not for base station system, therefore efficiently solve the problem of above-mentioned scene for the wireless backhaul technology (Wireless Backhual) of base station system.
In prior art, subscriber equipment in wireless backhaul technology (User Equipment is called for short UE) sends the data to trunking (Relay), then is sent to the base station of far-end by Relay, and then is sent to core net by the base station of far-end.Conventionally adopt time-division or frequency division mode to avoid Relay to send to the data of UE and the base station of far-end to send to the interference producing between the data of Relay.
But the method for this employing time-division or frequency division, can reduce the service efficiency of frequency spectrum.
Summary of the invention
The embodiment of the present invention provides a kind of signal to disturb processing method, device and trunking, avoids self-interference, the problem of the reduction frequency spectrum service efficiency causing with the method that overcomes available technology adopting time-division or frequency division.
One aspect of the present invention, provides a kind of signal to disturb processing unit, comprising: power division module, disturbance reconstruction module and power synthesis module;
Described power division module for obtaining the first antenna first signal to be sent, is isolated the secondary signal of the first setting power, and described secondary signal is inputed to described disturbance reconstruction module from described first signal;
Described disturbance reconstruction module, for generating interference-cancelled signals according to described secondary signal, and inputs to described power synthesis module by described interference-cancelled signals;
Described power synthesis module, for adopting described interference-cancelled signals to carry out Interference Cancellation to the 3rd signal of the second antenna reception.
The possible implementation of the first of first aspect present invention, described disturbance reconstruction module comprises: power distributing unit, signal adjustment unit and power synthesis unit;
Described power distributing unit, for described secondary signal being separated into at least two-way subsignal of the second setting power, and inputs to described signal adjustment unit by described at least two-way subsignal;
Described signal adjustment unit, for respectively described subsignal being carried out to range-adjusting and/or time delay adjustment, and inputs to described power synthesis unit by the subsignal after adjustment and/or time delay adjustment;
Described power synthesis unit, synthetic for the subsignal after adjustment and/or time delay adjustment being carried out to power, generate described interference-cancelled signals.
In conjunction with the possible implementation of the first of first aspect present invention, in the possible implementation of the second, the second setting power of described at least two-way subsignal is identical or different.
In conjunction with the possible implementation of the first of first aspect present invention or first aspect or the possible implementation of the second, in the third possible implementation, described the first antenna and the second antenna are arranged on described signal and disturb on processing unit; Or described the first antenna and the second antenna are antenna for base station.
In conjunction with the third possible implementation of first aspect present invention, in the 4th kind of possible implementation, if being arranged on described signal, described the first antenna and the second antenna disturb on processing unit, and described device also comprises: at least one interface unit;
Described interface unit, for inputting the 3rd signal of described the second antenna reception, and exports described the 3rd signal to described power synthesis module.
In conjunction with the 4th kind of possible implementation of first aspect present invention, in the 5th kind of possible implementation, described interface unit, also for inputting described power division module, described first signal is isolated to the 4th signal obtaining after the secondary signal of the first setting power, and exported described the 4th signal to described the first antenna;
Described the first antenna, also for launching described the 4th signal.
In conjunction with the 4th kind of possible implementation or the 5th kind of possible implementation of first aspect present invention, in the 6th kind of possible implementation, described interface unit comprises: filter, separates for the upward signal of described the first antenna transmission and downstream signal are carried out to frequency spectrum; And/or, the upward signal of described the second antenna transmission and downstream signal are carried out to frequency spectrum and separate.
In conjunction with the 6th kind of possible implementation of first aspect present invention, in the 7th kind of possible implementation, described interface unit also comprises: circulator; Described circulator, for separating with the downstream signal time of carrying out the upward signal of described the first antenna transmission; And/or, the upward signal of described the second antenna transmission was separated with the downstream signal time of carrying out.
In conjunction with the above-mentioned various possible implementations of first aspect, in the 9th kind of possible implementation, also comprise: radio frequency unit, for described first signal is carried out to analog-to-digital conversion, inputs to described power division module by the first signal that is converted into analog signal; Or,
For described the 3rd signal is carried out to analog-to-digital conversion, the 3rd signal that is converted into digital signal is inputed to described power synthesis module.
In conjunction with the above-mentioned various possible implementations of first aspect, in the tenth kind of possible implementation, also comprise: access digital processing element, for the 3rd signal of Interference Cancellation is accessed to processing, is transferred to the 3rd signal the digital processing element of base station.
Second aspect, the invention provides a kind of trunking, comprises that signal as described above disturbs processing unit and digital processing element;
Described digital processing element, for receiving the 3rd signal that disturbs processing unit transmission, and carries out Packet Filtering processing to described the 3rd signal.
The third aspect, the invention provides a kind of signal and disturb processing method, comprising:
Obtain the first antenna first signal to be sent;
From described first signal, isolate the secondary signal of the first setting power;
Generate interference-cancelled signals according to described secondary signal;
Adopt described interference-cancelled signals to carry out Interference Cancellation to the 3rd signal of the second antenna reception.
In the possible implementation of the first of the third aspect, described according to described secondary signal generation interference-cancelled signals, comprising:
Described secondary signal is separated into at least two-way subsignal of the second setting power;
Respectively described subsignal is carried out to range-adjusting and/or time delay adjustment;
Subsignal after adjustment and/or time delay adjustment is carried out to power and synthesize, generate described interference-cancelled signals.
In conjunction with the possible implementation of the first of the third aspect, in the possible implementation of the second, the second setting power of described at least two-way subsignal is identical or different.
Embodiment of the present invention signal disturbs processing method, device and trunking, by power division module, for obtaining the first antenna first signal to be sent, from first signal, isolate the secondary signal of the first setting power, and secondary signal is inputed to disturbance reconstruction module, again by disturbance reconstruction module, generate interference-cancelled signals for secondary signal, and interference-cancelled signals is inputed to power synthesis module, final by power synthesis module, for adopting interference-cancelled signals to carry out Interference Cancellation to the 3rd signal of the second antenna reception.The interference of the signal that the signal of having avoided the first antenna to launch arrives for the second antenna reception, simultaneously, signal that the present embodiment provides disturb processing unit not by the second antenna reception to signal and the mode transmitted by time-division or frequency division mode of the armed signal of the first antenna, while having avoided like this adopting the mode of time-division or frequency division, reduce the service efficiency of frequency spectrum.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation that signal of the present invention disturbs processing unit embodiment mono-;
Fig. 2 is the structural representation of a kind of feasible disturbance reconstruction module embodiment mono-;
Fig. 3 is the operation principle schematic diagram of disturbance reconstruction module embodiment mono-;
Fig. 4 is the structural representation that signal of the present invention disturbs processing unit embodiment bis-;
Fig. 5 is the operation principle schematic diagram that signalization of the present invention is disturbed the trunking of processing unit;
Fig. 6 is the structural representation of trunking embodiment mono-of the present invention;
Fig. 7 is the structural representation of trunking embodiment bis-of the present invention;
Fig. 8 is the structural representation of trunking embodiment tri-of the present invention;
Fig. 9 is the structural representation of trunking embodiment tetra-of the present invention;
Figure 10 is the flow chart that signal of the present invention disturbs processing method embodiment mono-
Figure 11 is the flow chart that the present invention generates interference-cancelled signals embodiment of the method one.
Embodiment
For making object, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
The techniques described herein may be used in various communication systems, for example current 2G, 3G communication system and next generation communication system, for example global system for mobile communications (GSM, Global System for Mobile communications), code division multiple access (CDMA, Code Division Multiple Access) system, time division multiple access (TDMA, Time Division Multiple Access) system, Wideband Code Division Multiple Access (WCDMA) (WCDMA, Wideband Code Division Multiple Access Wireless), frequency division multiple access (FDMA, Frequency Division Multiple Addressing) system, OFDM (OFDMA, Orthogonal Frequency-Division Multiple Access) system, Single Carrier Frequency Division Multiple Access (SC-FDMA) system, GPRS (GPRS, General Packet Radio Service) system, Long Term Evolution (LTE, Long Term Evolution) system, and other these type of communication systems.
Fig. 1 is the structural representation that signal of the present invention disturbs processing unit embodiment mono-, and with reference to Fig. 1, this signal disturbs processing unit can be arranged on trunking, for example: Relay is upper, or, can also be arranged on the base station as trunking, for example: NodeB, the base station of the types such as eNodeB.And above-mentioned trunking has two groups of antennas, this signal disturbs processing unit can be for the interference of the reception signal to another group antenna that transmits of one group of antenna is wherein processed.
This signal disturbs processing unit to comprise: power division module 10, disturbance reconstruction module 11, power synthesis module 12.
The function of power division module 10 can adopt the device such as power splitter, directional coupler to realize.In the present embodiment, the first antenna 14 and the second antenna 13 can be arranged on the antenna on trunking, or, can also be to be set directly at this signal to disturb the antenna on processing unit.First signal is the first antenna 14 signal to be sent, and the 3rd signal is the signal that the second antenna 13 receives.
Concrete, the first antenna 14 first signal to be sent can be upward signal, also downstream signal.If first signal is upward signal, this first signal can send to trunking for UE, then is sent to the signal of telepoint base station by the first antenna of trunking; If first signal is downstream signal, this first signal can send to trunking for telepoint base station, then is sent to the signal of UE by trunking.Power division module 10 can be carried out power division to first signal, from first signal, separate secondary signal, the concrete performance number of the first setting power can be according to the actual requirements or empirical value arrange, do not limit herein, be understandable that, first signal is isolated the signal demand obtaining after secondary signal and is guaranteed to meet the normal demand that sends to UE or telepoint base station.
Concrete, disturbance reconstruction module 11 receives after the secondary signal that power division module 10 inputs, and disturbance reconstruction module 11 can adopt the mode of adjusting amplitude and/or adjusting phase place to process secondary signal, generates interference-cancelled signals.It should be noted that; the signal that the signal sending due to the first antenna 14 can receive the second antenna 13 produces and disturbs; and in the signal that the second antenna 13 receives, conventionally mix the signal that has the first antenna 14 to send; therefore; in the embodiment of the present invention, from the first antenna 14 first signal to be sent, isolate the 3rd signal that the secondary signal of certain power receives the second antenna 13 and carry out Interference Cancellation.And disturbance reconstruction module 11 can make the amplitude of the interference signal obtaining and/or phase place produce closer to the 3rd signal that the second antenna 13 is received the signal disturbing by secondary signal being adjusted to the processing of amplitude and/or adjustment phase place.Be understandable that, the range-adjusting that disturbance reconstruction module 11 is carried out and/or phase place adjustment can be carried out based on experience value.
The function of power synthesis module 12 can adopt the devices such as mixer, power splitter, coupler to realize.Concrete, it is synthetic that the 3rd signal that power synthesis module 12 receives interference-cancelled signals and the second antenna 13 carries out power, by interference-cancelled signals, the interference signal in the 3rd signal is offset, owing to having offset interference, therefore the signal obtaining after, synthetic is closer to the signal receiving under the second antenna 13 perfect conditions.
It should be noted that, the 3rd signal that the second antenna 13 receives can be upward signal or downstream signal.If the 3rd signal is upward signal, the 3rd signal can be the signal that UE that the second antenna 13 of trunking receives sends, and the signal that trunking can also obtain the 3rd signal after Interference Cancellation sends to remote equipment; If the 3rd signal is downstream signal, the 3rd signal can be the signal that remote equipment that the second antenna 13 of trunking receives sends, and the signal that trunking can also obtain the 3rd signal after Interference Cancellation sends to UE.
Optionally, for the ease of using the signal that the embodiment of the present invention relates to disturb processing unit, the first antenna that the embodiment of the present invention relates to and the second antenna can be set directly at this signal to be disturbed on processing unit, thereby can not carry out any improvement to existing trunking, and the direct function that is realized signal transmitting and receiving by the first antenna and the second antenna, this modular signal disturbs processing unit to be convenient to install.
Or the first antenna and the second antenna can be the antenna on the trunkings such as base station, signal disturbs processing unit can utilize the antenna on existing trunking like this, can be cost-saving.
The signal that the present embodiment provides disturbs processing unit, from the first antenna first signal to be sent, isolate the secondary signal of certain power by power division module, and generate interference-cancelled signals by disturbance reconstruction module according to this secondary signal, in power synthesis module, adopt interference-cancelled signals to carry out Interference Cancellation to the 3rd signal of the second antenna reception.Thereby reduce the interference that the first antenna transmits to the second antenna receiving signal, improved the service efficiency of frequency spectrum.
On basis embodiment illustrated in fig. 1, Fig. 2 is the structural representation of a kind of feasible disturbance reconstruction module embodiment mono-, and with reference to Fig. 2, disturbance reconstruction module 11 comprises: power distributing unit 110, signal adjustment unit 111, power synthesis unit 112.
On basis embodiment illustrated in fig. 2, Fig. 3 is the operation principle schematic diagram of disturbance reconstruction module embodiment mono-, with reference to Fig. 2 and 3, power distributing unit 110 can be separated into secondary signal at least two-way subsignal of the second setting power, wherein, at least can equate also can be unequal for the power of two-way subsignal, will not limit herein.
Concrete, with reference to Fig. 3, signal adjustment unit 111 can carry out respectively range-adjusting and/or time delay adjustment to each way signal, subsignal after range-adjusting and/or time delay are adjusted can erasure signal disturbs the self-interference signal of processing unit, also can eliminate the second antenna reception to the 3rd signal in the multipath self-interference that causes due to Ambient.It should be noted that, the amplitude that signal adjustment unit 111 is adjusted and the adjusting range of time delay can be fixed, and also can change according to the actual requirements.Concrete, range-adjusting and/or time delay adjustment are controlled by concrete algorithm, and the present invention will not limit.
Optionally, be arranged under the enforcement scene on signal interference processing unit at the first antenna and the second antenna, signal disturbs processing unit can further include: at least one interface unit.
Interface unit, for inputting the 3rd signal of the second antenna reception, and exports the 3rd signal to power synthesis module., this interface unit is as the interface between the second antenna and power synthesis module in signal interference processing unit.
This interface unit, also isolates first signal for input Power Distribution module the 4th signal obtaining after the secondary signal of the first setting power, and exports the 4th signal to first antenna, and this first antenna, also for launching the 4th signal., this interface unit can also disturb the interface between the first antenna and power division module in processing unit as signal.
Concrete, the first antenna and the second antenna can share an interface unit, also can connect respectively an interface unit, Fig. 4 is the structural representation that signal of the present invention disturbs processing unit embodiment bis-, as shown in Figure 4, the signal that this embodiment provides disturbs processing unit to comprise 2 interface units, and the first antenna 14 is connected with first interface unit 16, and the second antenna 13 is connected with the second interface unit 15.Signal shown in Fig. 4 disturbs in processing unit, indicate the transmitting procedure of a signal with arrow solid black lines, this signal can be upward signal or downstream signal, but the signal providing for the present embodiment disturbs processing unit 11, can receive upward signal and downstream signal simultaneously, when the second antenna 13 receives downstream signal, also send upward signal, corresponding the first antenna 14 also receives upward signal in sending downstream signal.Certainly, what the second antenna 13 also can receive is upward signal and what send is downstream signal, the first antenna 14 adjusts accordingly.For the first antenna 14 and the concrete signal sending of the second antenna 13 or the signal of reception, the present embodiment will not limit.And in order to guarantee that upward signal and downstream signal transmit simultaneously, the present embodiment is introduced interface unit, its role is to, upward signal and downstream signal are carried out to duplex transmission.
Optionally, disturb processing unit to be arranged on a Frequency Division Duplexing (FDD) as trunking (Frequency Division Duplexing at signal, be called for short FDD) on the base station of pattern time, this signal disturbs the access digital processing element of processing unit to be connected by netting twine with the digital processing element of base station, the digital processing element of this base station is mainly used in upward signal or downstream signal to carry out filtration treatment, and this signal disturbs processing unit can receive upward signal or the downstream signal of the process filtration treatment of digital processing element input.This interface unit can comprise: filter, and for being carried out to frequency spectrum, the upward signal of the first antenna transmission and downstream signal separate, and/or, the upward signal of the second antenna transmission and downstream signal are carried out to frequency spectrum and separate.
Disturb processing unit to be arranged on a time division duplex as trunking (Time Division Duplexing at signal, be called for short TDD) on the base station of pattern time, this signal disturbs the access digital processing element of processing unit to be connected by netting twine with the digital processing element of base station, now, interface unit can also comprise: circulator.Circulator is for separating with the downstream signal time of carrying out the upward signal of the first antenna transmission.And/or, the upward signal of the second antenna transmission was separated with the downstream signal time of carrying out.
Optionally, signal disturbs processing unit can also comprise access digital processing element, for the 3rd signal of Interference Cancellation is accessed to processing, the 3rd signal is transferred to the digital processing element of base station.
Concrete, signal disturbs the access digital processing element arranging in processing unit, can be connected with the digital processing element in base station as trunking by netting twine, like this, on the base station as trunking, signalization is disturbed in processing unit process, do not need again the upgrading of modifying of the correlation module to inside of base station and circuit, simplified installation process.And, for access digital processing element and situation as the existing base station integrated setting of trunking, due to existing base station integrated the function of access digital processing element, signal disturbs processing unit can not comprise access digital processing element.
The present invention also provides a kind of embodiment of trunking, and this kind of trunking can be the equipment of the types such as Relay, NodeB, eNodeB, and the signal that being provided with the embodiment of the present invention on it provides disturbs processing unit.The present embodiment describes take base station as trunking as example.Fig. 5 is the operation principle schematic diagram that signalization of the present invention is disturbed the trunking of processing unit, with reference to Fig. 5, this trunking disturbs processing unit to form by existing base station and signal, guaranteed core net that telepoint base station connects and UE between communicate by letter, and this signal disturbs the digital processing element of processing unit and existing base station easy to connect, disturb the processing unit can be according to the generation interference-cancelled signals that transmits of one group of antenna wherein by signal, merge with the reception signal of crossing this interference-cancelled signals and another group antenna, the elimination interference to received signal that transmits, thereby reduce the interference that the first antenna transmits to the second antenna receiving signal, improve the service efficiency of frequency spectrum.
Wherein, as the digital processing element in the base station of trunking, for receiving the 3rd signal that disturbs processing unit transmission, and the 3rd signal is carried out to filtration treatment.
Concrete, the 3rd signal may also have residual interference signal, now passes through as the digital processing element in the base station of trunking residual interference signal filtering.
Trunking provided by the invention is in different enforcement scenes, and its internal structure is slightly different, and following examples describe respectively for the trunking under different scenes.
Fig. 6 is the structural representation of trunking embodiment mono-of the present invention, it should be noted that, as shown in Figure 6, wherein the solid black lines with arrow is upward signal, black dotted lines with arrow is downstream signal, and upward signal and downstream signal disturb in processing unit and can be divided into multichannel upward signal and multichannel downstream signal at signal, in Fig. 6, be respectively divided into respectively two-way take upward signal and downstream signal and describe as example.Disturb on processing unit and be provided with the first antenna and the second antenna at the signal of this trunking, the first antenna and the second antenna can comprise respectively one or more antenna.Base station as trunking in the present embodiment adopts fdd mode signal transmission.Signal disturbs the access digital processing element 18 of processing unit and the digital processing element 19 of base station to be connected by netting twine.
Send to the downstream signal of UE because signal disturbs processing unit both can receive telepoint base station, and this downstream signal is sent to UE; Also the first antenna shown in Fig. 6 can receive UE and send to the upward signal of telepoint base station, and this upward signal is sent to telepoint base station, so both can receive the downstream signal that telepoint base station sends, and also can send upward signal to telepoint base station.The second antenna both can receive the upward signal that UE sends, and also can send downstream signal to UE.
Be connected with the existing base station of the fdd mode transmission as trunking because this signal in the present embodiment disturbs processing unit, for upward signal and downstream signal are carried out to duplex transmission, interface unit can comprise the first filter 16 and the second filter 15.
The first filter 16, carries out frequency division transmission for upward signal that the first antenna is received and downstream signal to be sent.
The second filter 15, for to the second antenna reception to downstream signal and upward signal to be sent carry out frequency division transmission.
Signal at the present embodiment disturbs processing unit, be provided with two groups of radio frequency units, because disturbing processing unit, signal can process upward signal and downstream signal simultaneously, so one group of radio frequency unit comprises: first transmit processing module 171 and first receive signal processing module 172, another group radio frequency unit comprise: second transmit processing module 173 and second receive signal processing module 174.Certainly, the first antenna and the second antenna also can share one group of radio frequency unit.
Take first group of radio frequency unit as example, wherein first processing module 171 that transmits, be converted into analog signal for the downstream signal to be sent that the digital processing element from existing base station 19 is received from digital signal, and give the 3rd power division module 103 and the 4th power division module 104 by this analog signal transmission.
First receives signal processing module 172 upward signal that the first antenna is received is converted into digital signal from analog signal, and is transferred to digital processing element 19 and accesses processing.Concrete, the upward signal that the first antenna receives inputs to the first reception signal processing module 172 after the first power synthesis module 121 synthesizes interference-cancelled signals with the second power synthesis module 122.
Take second group of radio frequency unit as example.Wherein second processing module 173 that transmits, for the upward signal to be sent receiving from access digital processing element 18 is converted into analog signal from digital signal, and give the first power division module 101 and the second power division module 102 by this analog signal transmission.
Second receive signal processing module 174 by the second antenna by the second antenna reception to downstream signal be converted into digital signal from analog signal, and be transferred to access digital processing element 18 access processing.Concrete, the second antenna reception to downstream signal after the 3rd power synthesis module 123 synthesizes interference-cancelled signals with the 4th power synthesis module 124, input to the second reception signal processing module 172.
Below with reference to Fig. 6, the operation principle of the trunking that the present embodiment is provided describes.
First, with trunking, downstream signal being treated to example describes.
The downstream signal (i.e. the 3rd signal) that the second antenna reception sends to telepoint base station, this signal is analog signal.This downstream signal is transferred to the second filter 15 by the second antenna, because the second antenna also carries out the transmission of upward signal simultaneously, so this downstream signal and upward signal to be sent are carried out frequency division transmission process by the second filter 15, and this downstream signal is transferred to the 3rd power synthesis module 123 and the 4th power synthesis module 124.The 3rd power synthesis module 123 and the 4th power synthesis module 124 are corresponding with the second antenna reception Dao mono-road downstream signal respectively.
With reference to Fig. 6, the 3rd power division module 103 and the 4th power division module 104 are obtained the first antenna downstream signal to be sent (being first signal), from this downstream signal, isolate respectively the secondary signal of road first setting power, and this secondary signal is sent to disturbance reconstruction module 11, disturbance reconstruction module 11 generates interference-cancelled signals according to secondary signal, optionally, disturbance reconstruction module 11 can adopt the technical scheme shown in Fig. 3 to obtain interference-cancelled signals.Disturbance reconstruction module 11 is input to interference-cancelled signals respectively the 3rd power synthesis module 123 and the 4th power synthesis module 124, carry out power with the second antenna reception to the downstream signal of telepoint base station transmission and synthesize, thus the interference of the signal that the signal that counteracting the first antenna is launched arrives the second antenna reception.
Through the 3rd power synthesis module 123 and the 4th power synthesis module 124 by synthetic interference-cancelled signals downstream signal after treatment through the digital processing element 19-first of the second reception signal processing module 174-access existing base station of digital processing element 18-processing module 171-power division module (i.e. the 3rd power division module 103 and the 4th power division module 104) the-first filter 16 that transmits, finally send to UE by the first antenna.
Concrete, downstream signal is during through the second reception signal processing module 174, second receives signal processing module 174 is converted to digital signal by this downstream signal from analog signal, and inputs to access digital processing element 18, and access digital processing element 18 accesses processing to this downstream signal.Access digital processing element 18 inputs to the downstream signal that completes access processing the digital processing element 19 of base station by netting twine, the digital processing element 19 of base station carries out corresponding filtration treatment to this downstream signal.The digital processing element 19 of base station is by common public radio interface (The Common Public Radio Interface, being called for short CRPI) downstream signal that filtration treatment is crossed is transferred to the processing module that transmits in another group radio frequency unit, it is the processing module 171 that transmits of first in Fig. 6, first processing module 171 that transmits is converted to analog signal by this downstream signal from digital signal, transmit processing module 171 while being converted to analog signal transmission to the 3rd power division module 103 and the 4th power division module 104 from digital signal at this downstream signal through first, this downstream signal is carried out power division by the 3rd power division module 103 and the 4th power division module 104 again, isolate the signal (being secondary signal) of the first setting power and send to disturbance reconstruction module 11, send to power synthesis module to produce interference-cancelled signals, be the 3rd power synthesis module 123 and the 4th power synthesis module 124 in Fig. 6, so that being synthesized offseting signal by power synthesis module, disturbs the downstream signal receiving after this interference-cancelled signals and the second antenna.Meanwhile, the downstream signal (i.e. the 4th signal) obtaining after the 3rd power division module 103 and the 4th power division module 104 are isolated is transferred to the first filter 16, sends to UE by the first antenna.
It should be noted that, at trunking initial phase, in the time that the second antenna equipment receives downstream signal, now because the first antenna does not have downstream signal to be sent, the 3rd power division module 103 and the 4th power division module 104 do not obtain downstream signal to be sent, so do not produce interference-cancelled signals in power synthesis module 11, power is synthetic during through the 3rd power synthesis module 123 and the 4th power synthesis module 124 processes for downstream signal, and need to wait until this downstream signal through the 3rd power division module 103 and the 4th power division module 104 time, isolate after the signal (being secondary signal) of the first setting power, power synthesis module 11 could produce interference-cancelled signals according to this secondary signal.
And the technical scheme that the present embodiment to process solid black lines be upward signal technical scheme and the present embodiment are processed above-mentioned downstream signal is similar, difference is, UE, is finally sent by the second antenna by the first antenna reception to the upward signal of telepoint base station transmission.It should be noted that, in the present embodiment, the first antenna is used for receiving upward signal and sends downstream signal, and the second antenna is used for receiving downstream signal and sends upward signal.And being replaced mutually, the function of the function of the first antenna and the second antenna technical scheme provided by the invention is not impacted, so will not limit.
Fig. 7 is the structural representation of trunking embodiment bis-of the present invention, and its technical scheme and operation principle and trunking embodiment mono-of the present invention are similar, repeat no more herein.It should be noted that, as shown in Figure 7, when interference processing unit in the present embodiment is connected with the digital signal processing module of the base station of the transmission of the tdd mode as trunking, need on Fig. 6 basis, add two circulators, i.e. the first circulator 20 and the second circulator 21.
The first circulator 20 and the second circulator 21 are for carrying out time-division transmission process to upward signal and downstream signal.
Concrete, the first circulator 20 and the second circulator 21 are processed accordingly for upward signal and downstream signal are separated to different radio-frequency channels.With reference to Fig. 7, take the second circulator 21 as example, the second circulator 21 is separated to upward signal and downstream signal respectively second processing module 173 and second that transmits and receives signal processing module 174 and carry out respective handling.
Fig. 8 is the structural representation of trunking embodiment tri-of the present invention, and its technical scheme and operation principle and trunking embodiment mono-of the present invention are similar, repeat no more herein.It should be noted that, when interference processing unit in the present embodiment is connected with the digital signal processing module 19 of the base station of the transmission of the fdd mode as trunking, digital processing element 19 on base station and one group of radio frequency unit integrate, and this digital processing element 19 has had signal is carried out to the function that analog signal and digital signal are changed mutually.Now need to one group of radio frequency unit be replaced with to the 3rd filter 22 on Fig. 6 basis is connected with the digital processing element 19 of base station.
The 3rd filter 22 is connected by netting twine with data processing unit 19, the 3rd filter 22 will send to the upward signal of data processing unit, be in Fig. 8, to be with shown in arrow black line, be transferred to digital processing element 19, the downstream signal that digital processing element 19 is transferred to the 3rd filter 22 is transferred to the 3rd power division module 103 and the 4th power division module 104.
Fig. 9 is the structural representation of trunking embodiment tetra-of the present invention, and its technical scheme and operation principle and trunking embodiment mono-of the present invention are similar, repeat no more herein.It should be noted that, when interference processing unit in the present embodiment is connected with the digital signal processing module 19 of the existing base station of the transmission of the fdd mode as trunking, digital processing element 19 on base station integrates with radio frequency unit, and access digital processing element 18 integrates with radio frequency unit.This access digital processing element 18 has had signal has been carried out to the function that analog signal and digital signal are changed mutually.Now need on Fig. 8 basis, the one group of radio frequency unit being connected with access digital processing element 18 be replaced to the 4th filter 23.
Because at access data processing unit 18 and radio frequency unit, being specially second processing module 173 and second that transmits receives in signal processing module 174 situation about integrating, in the time signal being disturbed processing unit be installed on existing base station, can not modify to the circuit of radio frequency unit, so the 4th filter 23 is set to be connected by netting twine with access data processing unit 18, the upward signal sending for receiving access digital processing element 18, and give the first power division module 101 and the second power division module 102 by this uplink signal transmissions.Or the downstream signal transmitting for receiving the 3rd power synthesis module 123 and the 4th power synthesis module 124, and this downstream signal is transferred to access digital processing element 18.
Figure 10 is the flow chart that signal of the present invention disturbs processing method embodiment mono-, as shown in figure 10, comprises the steps:
Concrete, signal disturbs the power division module in processing unit to obtain the first antenna first signal to be sent.This first signal can be upward signal, can be also downstream signal.
Concrete, signal disturbs the power division module in processing unit from first signal, to isolate the secondary signal of the first setting power.The concrete performance number of the first setting power can be according to the actual requirements or empirical value arrange, do not limit herein, be understandable that, first signal is isolated the signal demand obtaining after secondary signal and guarantees to meet the normal demand of communication.
Concrete, signal disturbs the disturbance reconstruction module in processing unit to generate interference-cancelled signals according to secondary signal.
Concrete, signal disturbs the power synthesis module in processing unit that the 3rd signal of interference-cancelled signals and the second antenna reception is carried out to power merging, thereby has offset the interference of three signal of the first antenna first signal to be sent to the second antenna reception.And the 3rd signal can be also upward signal or downstream signal.
It should be noted that, the first antenna first signal to be sent can be that upward signal can be also downstream signal, the first antenna can be telepoint base station corresponding interface antenna, also can be UE corresponding interface antenna, in like manner, the second corresponding antenna can be UE corresponding interface antenna, can be also telepoint base station corresponding interface antenna.And, for method provided by the invention, can process upward signal and downstream signal simultaneously.During take the first antenna as telepoint base station corresponding interface antenna, as example, the first antenna can receive the downstream signal that telepoint base station sends, and sends upward signal to telepoint base station simultaneously.Corresponding, the second antenna can receive the upward signal that UE sends, and sends downstream signal to UE simultaneously.
The method that the present embodiment provides, the technical scheme that adopts Fig. 1 to provide, has realized similar technique effect, repeats no more herein.
Further, Figure 11 is the flow chart that the present invention generates interference-cancelled signals embodiment of the method one, as shown in figure 11, for step 102, can generate as follows interference-cancelled signals:
Concrete, the power distributing unit in disturbance reconstruction module is separated into secondary signal at least two-way subsignal of the second setting power.Wherein, at least the second setting power of two-way subsignal is identical or different, will not limit herein.
Signal adjustment unit in disturbance reconstruction module carries out range-adjusting and/or time delay adjustment to subsignal respectively.Signal adjustment unit can carry out respectively range-adjusting and/or time delay adjustment to each way signal, subsignal after range-adjusting and/or time delay are adjusted can erasure signal disturbs the self-interference signal of processing unit, also can eliminate the second antenna reception to the 3rd signal in the multipath self-interference that causes due to Ambient.It should be noted that, the amplitude of signal adjustment unit adjustment and the adjusting range of time delay can be fixed, and also can change according to the actual requirements.
Concrete, the power synthesis unit in disturbance reconstruction module carries out power to the subsignal after range-adjusting and/or time delay adjustment and synthesizes, and generates interference-cancelled signals.Optionally, with reference to the technical scheme shown in Fig. 3, generate interference-cancelled signals.
The generation interference-cancelled signals method that the present embodiment provides, the technical scheme that adopts Fig. 3 to provide, has realized similar technique effect, repeats no more herein.
One of ordinary skill in the art will appreciate that: all or part of step that realizes above-mentioned each embodiment of the method can complete by the relevant hardware of program command.Aforesaid program can be stored in a computer read/write memory medium.This program, in the time carrying out, is carried out the step that comprises above-mentioned each embodiment of the method; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CDs.
Finally it should be noted that: above each embodiment, only in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to aforementioned each embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or some or all of technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (14)
1. signal disturbs a processing unit, it is characterized in that, comprising: power division module, disturbance reconstruction module and power synthesis module;
Described power division module for obtaining the first antenna first signal to be sent, is isolated the secondary signal of the first setting power, and described secondary signal is inputed to described disturbance reconstruction module from described first signal;
Described disturbance reconstruction module, for generating interference-cancelled signals according to described secondary signal, and inputs to described power synthesis module by described interference-cancelled signals;
Described power synthesis module, for adopting described interference-cancelled signals to carry out Interference Cancellation to the 3rd signal of the second antenna reception.
2. device according to claim 1, is characterized in that, described disturbance reconstruction module comprises: power distributing unit, signal adjustment unit and power synthesis unit;
Described power distributing unit, for described secondary signal being separated into at least two-way subsignal of the second setting power, and inputs to described signal adjustment unit by described at least two-way subsignal;
Described signal adjustment unit, for respectively described subsignal being carried out to range-adjusting and/or time delay adjustment, and inputs to described power synthesis unit by the subsignal after adjustment and/or time delay adjustment;
Described power synthesis unit, synthetic for the subsignal after range-adjusting and/or time delay adjustment being carried out to power, generate described interference-cancelled signals.
3. device according to claim 2, is characterized in that, the second setting power of described at least two-way subsignal is identical or different.
4. according to the device described in claim 1-3 any one, it is characterized in that, described the first antenna and the second antenna are arranged on described signal and disturb on processing unit; Or described the first antenna and the second antenna are antenna for base station.
5. device according to claim 4, is characterized in that, disturbs on processing unit if described the first antenna and the second antenna are arranged on described signal, and described device also comprises: at least one interface unit;
Described interface unit, for inputting the 3rd signal of described the second antenna reception, and exports described the 3rd signal to described power synthesis module.
6. device according to claim 5, it is characterized in that, described interface unit, also isolates described first signal for inputting described power division module the 4th signal obtaining after the secondary signal of the first setting power, and exports described the 4th signal to described the first antenna;
Described the first antenna, also for launching described the 4th signal.
7. according to the device described in claim 5 or 6, it is characterized in that, described interface unit comprises: filter, separates for the upward signal of described the first antenna transmission and downstream signal are carried out to frequency spectrum; And/or, the upward signal of described the second antenna transmission and downstream signal are carried out to frequency spectrum and separate.
8. device according to claim 7, is characterized in that, described interface unit also comprises: circulator; Described circulator, for separating with the downstream signal time of carrying out the upward signal of described the first antenna transmission; And/or, the upward signal of described the second antenna transmission was separated with the downstream signal time of carrying out.
9. according to the device described in claim 1-8 any one, it is characterized in that, also comprise: radio frequency unit, for described first signal is carried out to analog-to-digital conversion, inputs to described power division module by the first signal that is converted into analog signal; Or,
For described the 3rd signal is carried out to analog-to-digital conversion, the 3rd signal that is converted into digital signal is inputed to described power synthesis module.
10. according to the device described in claim 1-9 any one, it is characterized in that, also comprise: access digital processing element, for the 3rd signal of Interference Cancellation is accessed to processing, is transferred to the 3rd signal the digital processing element of base station.
11. 1 kinds of trunkings, is characterized in that, comprise that the signal as described in claim 1-10 any one disturbs processing unit and digital processing element;
Described digital processing element, for receiving the 3rd signal that disturbs processing unit transmission, and carries out filtration treatment to described the 3rd signal.
12. 1 kinds of signals disturb processing method, it is characterized in that, comprising:
Obtain the first antenna first signal to be sent;
From described first signal, isolate the secondary signal of the first setting power;
Generate interference-cancelled signals according to described secondary signal;
Adopt described interference-cancelled signals to carry out Interference Cancellation to the 3rd signal of the second antenna reception.
13. methods according to claim 12, is characterized in that, described according to described secondary signal generation interference-cancelled signals, comprising:
Described secondary signal is separated into at least two-way subsignal of the second setting power;
Respectively described subsignal is carried out to range-adjusting and/or time delay adjustment;
Subsignal after adjustment and/or time delay adjustment is carried out to power and synthesize, generate described interference-cancelled signals.
14. methods according to claim 13, is characterized in that, the second setting power of described at least two-way subsignal is identical or different.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210531488.1A CN103873399B (en) | 2012-12-11 | 2012-12-11 | Signal interference processing method, device and trunking |
| PCT/CN2013/085197 WO2014090038A1 (en) | 2012-12-11 | 2013-10-14 | Signal interference processing method and apparatus, and relay device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210531488.1A CN103873399B (en) | 2012-12-11 | 2012-12-11 | Signal interference processing method, device and trunking |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103873399A true CN103873399A (en) | 2014-06-18 |
| CN103873399B CN103873399B (en) | 2018-03-09 |
Family
ID=50911536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210531488.1A Active CN103873399B (en) | 2012-12-11 | 2012-12-11 | Signal interference processing method, device and trunking |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103873399B (en) |
| WO (1) | WO2014090038A1 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106664104A (en) * | 2014-07-15 | 2017-05-10 | 华为技术有限公司 | Signal recover method and signal transceiver device |
| WO2017080375A1 (en) * | 2015-11-10 | 2017-05-18 | Huawei Technologies Co., Ltd. | System and method for balanced passive cancellation for full duplex communications |
| CN107810607A (en) * | 2015-06-26 | 2018-03-16 | 英特尔公司 | Method, data handling system and the transceiver apparatus of process signal |
| CN110474656A (en) * | 2019-06-27 | 2019-11-19 | 维沃移动通信有限公司 | Signal receiving/transmission device and electronic equipment |
| WO2020056657A1 (en) * | 2018-09-20 | 2020-03-26 | 华为技术有限公司 | Signal processing device and method |
| US11018708B2 (en) | 2017-06-02 | 2021-05-25 | Intel IP Corporation | Received signal filtering device and method therefor |
| WO2023246699A1 (en) * | 2022-06-20 | 2023-12-28 | 中兴通讯股份有限公司 | Signal processing method, signal processing system, signal processing device, and storage medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030031279A1 (en) * | 2001-08-08 | 2003-02-13 | Viasat, Inc. | Method and apparatus for relayed communication using band-pass signals for self-interference cancellation |
| CN101141235A (en) * | 2006-09-08 | 2008-03-12 | 北京大学 | Interference canceling method for co-frequency co-time slot duplexing |
| CN101568174A (en) * | 2008-04-24 | 2009-10-28 | 阿尔卡特朗讯 | Method for reducing interference in a radio network equipment and equipment performing the method |
| CN102237906A (en) * | 2010-04-20 | 2011-11-09 | 英特赛尔美国股份有限公司 | Systems and methods for improving antenna isolation using signal cancellation |
| CN102355296A (en) * | 2011-06-30 | 2012-02-15 | 武汉虹信通信技术有限责任公司 | Interference counteraction system used for co-frequency repeater and method thereof |
-
2012
- 2012-12-11 CN CN201210531488.1A patent/CN103873399B/en active Active
-
2013
- 2013-10-14 WO PCT/CN2013/085197 patent/WO2014090038A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030031279A1 (en) * | 2001-08-08 | 2003-02-13 | Viasat, Inc. | Method and apparatus for relayed communication using band-pass signals for self-interference cancellation |
| CN101141235A (en) * | 2006-09-08 | 2008-03-12 | 北京大学 | Interference canceling method for co-frequency co-time slot duplexing |
| CN101568174A (en) * | 2008-04-24 | 2009-10-28 | 阿尔卡特朗讯 | Method for reducing interference in a radio network equipment and equipment performing the method |
| CN102237906A (en) * | 2010-04-20 | 2011-11-09 | 英特赛尔美国股份有限公司 | Systems and methods for improving antenna isolation using signal cancellation |
| CN102355296A (en) * | 2011-06-30 | 2012-02-15 | 武汉虹信通信技术有限责任公司 | Interference counteraction system used for co-frequency repeater and method thereof |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106664104A (en) * | 2014-07-15 | 2017-05-10 | 华为技术有限公司 | Signal recover method and signal transceiver device |
| CN107810607A (en) * | 2015-06-26 | 2018-03-16 | 英特尔公司 | Method, data handling system and the transceiver apparatus of process signal |
| CN107810607B (en) * | 2015-06-26 | 2020-07-10 | 英特尔公司 | Method for processing signals, data processing system and transceiver device |
| WO2017080375A1 (en) * | 2015-11-10 | 2017-05-18 | Huawei Technologies Co., Ltd. | System and method for balanced passive cancellation for full duplex communications |
| US10230423B2 (en) | 2015-11-10 | 2019-03-12 | Huawei Technologies Canada Co., Ltd. | System and method for balanced passive cancellation for full duplex communications |
| US11018708B2 (en) | 2017-06-02 | 2021-05-25 | Intel IP Corporation | Received signal filtering device and method therefor |
| WO2020056657A1 (en) * | 2018-09-20 | 2020-03-26 | 华为技术有限公司 | Signal processing device and method |
| CN110474656A (en) * | 2019-06-27 | 2019-11-19 | 维沃移动通信有限公司 | Signal receiving/transmission device and electronic equipment |
| WO2023246699A1 (en) * | 2022-06-20 | 2023-12-28 | 中兴通讯股份有限公司 | Signal processing method, signal processing system, signal processing device, and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103873399B (en) | 2018-03-09 |
| WO2014090038A1 (en) | 2014-06-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103873399A (en) | Signal interference processing method and apparatus, and relay device | |
| EP2611229B1 (en) | Baseband signal transmission method and apparatus | |
| US8811525B2 (en) | Dual polarization antenna and method for transmitting and receiving signal using the same | |
| US9178636B2 (en) | Universal remote radio head | |
| CN104185186B (en) | The suppressing method and the network equipment of signal interference | |
| CN106063353A (en) | Systems and methods for OFDM with flexible sub-carrier spacing and symbol duration | |
| CN106471756A (en) | Integrated simulation and digital distributed antenna system using Full Fibre Network | |
| CN107148759A (en) | Controller for SUDA systems | |
| CN103828259A (en) | Distributed antenna system architectures | |
| CN105187085A (en) | Systems and methods for improved digital RF transport in distributed antenna systems | |
| CN101414869B (en) | Star-loading reconstruction wideband digital channel exchange method | |
| US9320040B2 (en) | Method and device for sending/receiving electromagnetic signals received/sent on one or more first frequency bands | |
| US11356190B2 (en) | Configurable wide area distributed antenna system | |
| WO2012146313A1 (en) | Methods in a base station, computer programs, computer program products and base station | |
| KR101803035B1 (en) | System and method for simultaneous wireless information and power transfer based on cancellation | |
| CN110875747B (en) | Transmission method and communication equipment | |
| CN111479230A (en) | Indoor light distribution system and method | |
| CN102651873A (en) | Signal transmission method, system and equipment for indoor distribution system | |
| JP6479696B2 (en) | Communication relay system and method | |
| CN114124194A (en) | Satellite flexible switching system and method based on digital channelized beam forming | |
| CN102523589A (en) | Baseband remote processing method and system thereof | |
| KR101525739B1 (en) | Signal dispersion method and signal dispersion apparatus | |
| CN101287079B (en) | Transmission method, system and device for broadcast television signal | |
| AU681970B2 (en) | Base station system for a digital cellular mobile radiotelephone network | |
| KR102025199B1 (en) | Radio-over-fiber transmission system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |