WO2019228338A1 - Procédé et appareil de traitement de signal, système d'antennes distribuées et support de stockage - Google Patents

Procédé et appareil de traitement de signal, système d'antennes distribuées et support de stockage Download PDF

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Publication number
WO2019228338A1
WO2019228338A1 PCT/CN2019/088776 CN2019088776W WO2019228338A1 WO 2019228338 A1 WO2019228338 A1 WO 2019228338A1 CN 2019088776 W CN2019088776 W CN 2019088776W WO 2019228338 A1 WO2019228338 A1 WO 2019228338A1
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WIPO (PCT)
Prior art keywords
signal
frequency
frequency conversion
processing
target
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PCT/CN2019/088776
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English (en)
Chinese (zh)
Inventor
聂广材
孟祥涛
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华为技术有限公司
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Publication of WO2019228338A1 publication Critical patent/WO2019228338A1/fr

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    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H04B7/15528—Control of operation parameters of a relay station to exploit the physical medium

Definitions

  • the present application relates to the field of communication technologies, and in particular, to a signal processing method, device, distributed antenna system, and computer-readable storage medium.
  • DAS Distributed Antenna System
  • the strength of the signal transmitted by the base station received by the user terminal is weaker than outdoor. If a DAS system is deployed indoors, the DAS system can use the antenna heads scattered indoors to provide users with The terminal sends signals. Since the antenna head is deployed indoors and is closer to the user, the signal strength received by the user terminal can be enhanced, thereby improving communication quality. In actual use, the DAS system can also be applied to a large number of areas with unsatisfactory network coverage. Therefore, the optimization of the DAS system is of great significance. How to better transmit signals in the DAS system is one of the hot issues.
  • Embodiments of the present invention provide a signal processing method, device, distributed antenna system, and computer-readable storage medium, which can better transmit signals in a DAS system.
  • an embodiment of the present invention provides a signal processing method that can be applied to a remote unit DRH of a distributed antenna system.
  • the method includes: determining a target processing signal, and performing frequency conversion processing on the target processing signal to obtain a first frequency conversion.
  • the target processing signal by converting the target processing signal into a first frequency-converted signal having a frequency within a first frequency range supported by the feeder cable, the first frequency-converted signal can be transmitted on the feeder cable with lower frequency loss, that is, The target processing signals of various frequencies are transmitted in the DAS system, which is beneficial to the old feeder cable.
  • the foregoing target processing signal may include a first target processing signal and a second target processing signal. Frequency conversion processing is performed on the foregoing target processing signal to obtain a first frequency conversion signal.
  • the specific implementation manner may be as follows: The target processing signal and the second target processing signal are subjected to frequency conversion processing to obtain two first frequency conversion signals, wherein the frequencies of the two first frequency conversion signals are within the aforementioned first frequency range, and the frequencies of the two first frequency conversion signals are different.
  • the capacity of the DAS system can be increased to twice the original capacity.
  • the frequency of the foregoing target processing signal may not be within the first frequency range.
  • the foregoing target processing signal may be a millimeter wave signal.
  • a millimeter wave signal that could not be transmitted in the DAS system can be made to be transmitted in the DAS system through frequency conversion into a first frequency conversion signal.
  • the specific implementation manner of determining the target processing signal may be: receiving a digital communication signal from the distributed antenna system control unit DCU, and performing digital-to-analog conversion on the digital communication signal to determine the target processing signal.
  • the signal processing method disclosed in the embodiment of the present invention can be applied to DAS systems with different architectures (such as DAS systems including DCUs and DAS systems not including DCUs), and can be used in DAS systems with different architectures. Each can transmit target processing signals of various frequencies.
  • an embodiment of the present invention provides another signal processing method that can be applied to an antenna head end of a distributed antenna system.
  • the method includes: determining a target transmission signal, and performing frequency conversion processing on the target transmission signal to obtain a first Two frequency conversion signals.
  • the frequency of the second frequency conversion signal is within the second frequency range supported by the operator, and the second frequency conversion signal is transmitted.
  • the antenna head end converts the target transmission signal into a second frequency-converted signal whose frequency is within the second frequency range supported by the operator, so that in the case that the second frequency range supported by the operator changes, It can also successfully send the second frequency conversion signal to the user terminal through the operator network. Or, in the case of the newly added frequency band supported by the operator (that is, the second frequency range is changed), the antenna head end can convert the target transmission signal into a second frequency-converted signal with a frequency in the frequency band newly added by the operator, thereby effectively Take advantage of this new frequency band.
  • the specific implementation manner of determining the target transmission signal may be: receiving a transmission signal from the DRH, and filtering the transmission signal to obtain the target transmission signal.
  • the antenna head end can obtain a target transmission signal by filtering the received transmission signal, so that the antenna head end only needs to process one target transmission signal, which is beneficial to reducing the overhead in a single antenna head end .
  • the foregoing transmission signal may be a first frequency conversion signal processed by frequency conversion of DRH.
  • both the DRH and the antenna head end can frequency-convert the received signal to suit the frequency range supported by the feeder cable and the operator.
  • the foregoing second frequency conversion signal may be a millimeter wave signal.
  • the antenna head end up-converts the first frequency-converted signal to a second frequency-converted signal with a frequency in the millimeter wave band. Because the higher the frequency of the carrier wave, the greater the achievable signal bandwidth, therefore, the frequency will be increased. After the second frequency-converted signal is transmitted, the signal bandwidth of the second frequency-converted signal can be effectively improved, which is conducive to increasing the capacity of the DAS system.
  • an embodiment of the present invention provides a signal processing device, which has a function of implementing the signal processing method described in the first aspect.
  • the functions may be implemented by hardware, and may also be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • an embodiment of the present invention provides another signal processing device, which has a function of implementing the signal processing method described in the second aspect.
  • the functions may be implemented by hardware, and may also be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • an embodiment of the present invention provides a distributed antenna system.
  • the distributed antenna system includes the signal processing device according to the third aspect and the signal processing device according to the fourth aspect.
  • an embodiment of the present invention provides a computer-readable storage medium for storing computer program instructions used by the signal processing apparatus according to the third aspect, which includes a program for executing the program according to the first aspect.
  • an embodiment of the present invention provides a computer-readable storage medium for storing computer program instructions used by the signal processing apparatus according to the fourth aspect, which includes a program for executing the program according to the second aspect.
  • an embodiment of the present invention provides a computer program product.
  • the program product includes a program that implements the method described in the first aspect when the program is executed.
  • an embodiment of the present invention provides a computer program product.
  • the program product includes a program that implements the method described in the second aspect when the program is executed.
  • an embodiment of the present invention provides a signal processing device.
  • the signal processing device includes a memory and a processor.
  • the memory stores program instructions.
  • the processor calls the program instructions stored in the memory to implement the signals described in the first aspect. Approach.
  • an embodiment of the present invention provides another signal processing device.
  • the signal processing device includes an antenna head, a memory, and a processor.
  • the memory stores program instructions.
  • the processor calls the program instructions stored in the memory to control all Said antenna head implements the signal processing method according to the second aspect.
  • FIG. 1 is a schematic structural diagram of a DAS system disclosed by an embodiment of the present invention
  • FIG. 2 is a schematic architecture diagram of another DAS system disclosed by an embodiment of the present invention.
  • FIG. 3 is a schematic flowchart of a signal processing method according to an embodiment of the present invention.
  • FIG. 4 is a schematic flowchart of another signal processing method disclosed by an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of still another signal processing method disclosed by an embodiment of the present invention.
  • FIG. 6 is a schematic flowchart of another signal processing method according to an embodiment of the present invention.
  • FIG. 7 is a schematic flowchart of another signal processing method according to an embodiment of the present invention.
  • FIG. 8 is a schematic flowchart of another signal processing method according to an embodiment of the present invention.
  • FIG. 9 is a schematic flowchart of another signal processing method according to an embodiment of the present invention.
  • FIG. 10 is a schematic flowchart of another signal processing method according to an embodiment of the present invention.
  • FIG. 11 is a schematic flowchart of another signal processing method according to an embodiment of the present invention.
  • FIG. 12 is a schematic structural diagram of a signal processing device disclosed by an embodiment of the present invention.
  • FIG. 13 is a schematic structural diagram of another signal processing apparatus disclosed by an embodiment of the present invention.
  • FIG. 14 is a schematic structural diagram of a signal processing device disclosed by an embodiment of the present invention.
  • FIG. 15 is a schematic structural diagram of another signal processing apparatus disclosed by an embodiment of the present invention.
  • the DAS system 10 includes a distributed antenna system control unit 101 (DAS Control Unit, DCU), a common public radio interface 102 (Common Public Radio Interface, CPRI), and a distributed antenna.
  • the system remote unit 103 (DAS Remote Head, DRH), feeder cable 104, multiple antenna heads 105, and controller 106.
  • DCU101 includes signal amplification, signal collection and distribution.
  • DCU101 converts radio frequency signals from Radio Remote Unit (RRU) 11 into digital signals, and transmits the digital signals to DRH103 through CPRI102.
  • RRU Radio Remote Unit
  • the DRH103 converts the received digital signal into a radio frequency signal, and transmits the radio frequency signal to each antenna head end 105 connected to the DRH103 through a feeder cable 104.
  • the antenna head end 105 sends the received radio frequency signal to the user terminal 12.
  • the controller 106 is configured to adjust related parameters in the DCU according to an actual situation, such as adjusting a signal amplification factor. It should be noted that the DAS system 10 shown in FIG. 1 including the controller 106 is only used as an example and does not constitute a limitation on the embodiment of the present invention. In other feasible implementation manners, the DAS system 10 may not include the controller 106 .
  • the foregoing DCU101 receives radio frequency signals from RRU11 for example only, and does not constitute a limitation on the embodiment of the present invention.
  • the radio frequency signals received by DCU101 may also be antennas of the base station (not shown in FIG. 1). Out) air interface signals transmitted.
  • the main principle of the technical solution of the present application includes: when a signal is received by the DAS system, the signal may be subjected to frequency conversion processing to obtain a frequency converted signal after frequency adjustment, and the frequency converted signal is transmitted in the DAS system.
  • the position of frequency conversion in the DAS system can be different, that is, according to the actual situation, the equipment that performs the frequency conversion processing (such as DRH, antenna head, and new dedicated frequency conversion equipment in the DAS system (see Figure The corresponding embodiment 11)) may be different.
  • the downlink signal received by the DAS system is taken as an example.
  • the target processing signal may be frequency-converted to obtain the first frequency after frequency adjustment.
  • the frequency-converted signal is then transmitted to the antenna head 105 via the feeder cable 104.
  • the frequency of the first frequency conversion signal is within a first frequency range supported by the feeder cable 105.
  • the antenna head end 105 may perform frequency conversion processing on the first frequency conversion signal to obtain a second frequency conversion signal, and send the second frequency conversion signal to a user terminal.
  • the frequency of the second frequency conversion signal is within a second frequency range supported by the operator.
  • the antenna head end 105 may directly send the first frequency conversion signal to the user terminal 12 without performing frequency conversion processing on the first frequency conversion signal.
  • the DRH 103 may not perform frequency conversion processing on the target processing signal, and the target processing signal may be directly transmitted to the antenna head 105 through the feeder cable 104.
  • the antenna head end 105 may determine a target transmission signal according to the target processing signal, and perform frequency conversion processing on the target transmission signal to obtain a second frequency conversion signal, and send the second frequency conversion signal to the user terminal. 12.
  • the frequency of the second frequency conversion signal is within a second frequency range supported by the operator.
  • the target processing signal such as a high-frequency signal
  • a first frequency conversion signal with a frequency matching the feeder cable can be obtained, so that the first frequency conversion signal can be lossed at a lower frequency.
  • Transmission on the feeder cable that is, the target processing signals of various frequencies can be transmitted in the DAS system, which is beneficial to the old feeder cable.
  • the signals received by the antenna head 105 such as the first frequency conversion signal, the target transmission Signal
  • a second frequency conversion signal with a frequency matching the operator can be obtained, and the second frequency conversion signal can also be successfully transmitted through the network of the operator when the second frequency range supported by the operator changes.
  • the plurality of target processing signals received by the DRH103 are converted into a plurality of first frequency-converted signals with different frequencies, and the plurality of first frequency-converted signals are transmitted on the feeder cable 104 Simultaneous transmission, which does not interfere with each other during the transmission process, can effectively increase the capacity of the DAS system.
  • FIG. 2 is a schematic diagram of an architecture of a DAS system disclosed in an embodiment of the present invention.
  • the DAS system 20 includes: a remote antenna system remote unit DRH201, a feeder cable 202, and an antenna head end 203.
  • DRH201 can receive radio frequency signals from RRU, or air interface signals (ie, radio frequency signals) transmitted by the antenna of the base station.
  • 203 may transmit the received radio frequency signal.
  • the antenna in the terminal device may receive a radio frequency signal transmitted by the antenna head end 203.
  • the DRH201 can receive radio frequency signals from one or more base stations, which is not limited in this embodiment of the present invention. It should also be noted that the DRH201 shown in FIG. 2 is connected to one antenna head 203 for example only, and does not constitute a limitation on the embodiment of the present invention. In other feasible implementations, the DRH201 can also be connected to three Antenna heads 203, 20, or other numbers are connected.
  • FIG. 3 is a schematic flowchart of a signal processing method according to an embodiment of the present invention. The method is applied to a DAS system. The method includes, but is not limited to, the following steps. :
  • Step S301 The remote antenna unit DRH of the distributed antenna system determines a target processing signal.
  • the DRH may receive a downlink radio frequency signal transmitted by an antenna of a base station or a downlink radio frequency signal sent by an RRU. Specifically, after receiving the downlink radio frequency signal, the DRH may determine the downlink radio frequency signal as a target processing signal. In an implementation manner, after receiving the downlink radio frequency signal, the DRH may amplify the downlink radio frequency signal and determine the amplified downlink radio frequency signal as a target processing signal.
  • the target processing signal may be a millimeter wave signal.
  • Millimeter wave refers to electromagnetic waves with a wavelength in the order of millimeters, and its frequency is between 30 GHz and 300 GHz.
  • the DRH may determine the millimeter wave signal as a target processing signal.
  • the DRH may receive a digital communication signal from the DCU, perform digital-to-analog conversion on the digital communication signal, and obtain the digital-to-analog conversion result.
  • the signal is determined as the target processing signal.
  • the signal processing methods disclosed in the embodiments of the present invention can be applied to DAS systems with different architectures (such as DAS systems including DCUs and DAS systems not including DCUs), that is, by performing processing on the target processing signals received by the DRH Frequency conversion processing makes it possible to transmit target processing signals of various frequencies in DAS systems with different architectures.
  • Step S302 The DRH performs frequency conversion processing on the target processing signal to obtain a first frequency conversion signal, wherein the frequency of the first frequency conversion signal is within a first frequency range supported by the feeder cable.
  • a feeder cable transmits electromagnetic waves, there is inherently a certain amount of energy loss.
  • the energy loss generated is related to the attenuation coefficient of the feeder cable, and different feeder cables may have different attenuation coefficients, that is, when transmitting electromagnetic waves of the same frequency on different feeder cables, Energy loss may be different.
  • the energy loss generated is related to the frequency of the electromagnetic wave.
  • each feeder cable corresponds to a supported first frequency range. When the frequency of a signal transmitted on the feeder cable is within the first frequency range, the loss generated during transmission is extremely low. When the frequency of the signal transmitted on the feeder cable is not within the first frequency range, the loss generated during the transmission is extremely high.
  • DRH converts the target processing signal into a first frequency-converted signal with a frequency within the first frequency range, so that when the first frequency-converted signal is transmitted on the feeder cable, the loss is extremely low, that is, it can be compared with the Low loss transmits target processing signals of various frequencies, and because the loss generated in the transmission process is low, the signal quality of the first frequency conversion signal received by the antenna head is higher, which is beneficial to improving the communication quality.
  • low frequency signals are mainly transmitted on feeder cables. If the high-frequency signal is transmitted on the feeder cable, it will cause great loss to the high-frequency signal. If you want to transmit high-frequency signals with low loss in the feeder cable, it means that you need to redeploy a new feeder cable, which will destroy the original decoration of the building and cost a lot.
  • the DRH can convert the high-frequency signal into a first frequency-converted signal with a lower frequency, and transmit the first frequency-converted signal to the antenna head end through the original feeder cable, where
  • the frequency of the first frequency conversion signal may be determined according to the first frequency range supported by the original feeder cable, so the first frequency conversion signal has a lower loss when transmitted on the original feeder cable. Therefore, by converting the target processing signal into the first frequency conversion signal, the target processing signal can be better transmitted in the DAS system.
  • a millimeter wave signal that cannot be transmitted in the DAS system can be made to be transmitted in the DAS system by being converted into a first frequency conversion signal.
  • the feeder cable in the current DAS system is used to transmit 2G, 3G, and 4G signals
  • the frequency of the 5G signal is not within the first frequency range supported by the current feeder cable. Transmission of 5G signals in current feeder cables will cause great loss to 5G signals.
  • the DRH performs a down-conversion process on the received 5G signal to obtain a first frequency-converted signal, and the first frequency-converted signal can be transmitted with a lower loss in the feeder cable.
  • the DRH when receiving a processing signal, may detect the frequency of the processing signal, and if the frequency of the processing signal is not within the first frequency range, determine the processing signal as a target processing signal, and Frequency conversion processing is performed on the target processing signal, and the first frequency conversion signal obtained after the frequency conversion processing is transmitted to the antenna head end through a feeder cable. If the frequency of the processed signal is within the first frequency range, the DRH can directly transmit the processed signal to the antenna head end through a feeder cable. In an implementation manner, if the frequency of the target processing signal is higher than the highest frequency in the first frequency range, the DRH may down-convert the target processing signal to reduce the frequency of the target processing signal to the first Within the frequency range. In an implementation manner, if the frequency of the target processing signal is lower than the lowest frequency in the first frequency range, the DRH may perform up-conversion processing on the target processing signal to increase the frequency of the target processing signal to the first Within the frequency range.
  • Step S303 The DRH transmits the first frequency conversion signal to the antenna head end through the feeder cable. Specifically, the DRH may transmit the first frequency conversion signal to the antenna head end through a feeder cable, so that the antenna head end processes the received first frequency conversion signal and sends the processed signal to a user terminal. In an implementation manner, after the DRH obtains the first frequency-converted signal, the first frequency-converted signal may be sent to one or more antenna heads connected to the DRH.
  • Step S304 The antenna head end transmits the first frequency conversion signal. Specifically, after receiving the first frequency conversion signal, the antenna head end may directly transmit the first frequency conversion signal, so that the antenna in the terminal device receives the first frequency conversion signal.
  • the target processing signal may be a user signal or an antenna control signal.
  • the first frequency conversion signal obtained according to the target processing signal may also be a user signal or an antenna control signal.
  • the antenna head end may send the first frequency conversion signal to the user terminal.
  • the antenna head end may not transmit the first frequency conversion signal and adjust the antenna accordingly according to the first frequency conversion signal.
  • the first frequency conversion signal may be subjected to frequency conversion processing.
  • the method is applied to a DAS system, and the method includes, but is not limited to, steps S401 to S405, and the execution processes of steps S401 to S403 can be respectively seen in the drawings. The detailed description of steps S301 to S303 in step 3 is not repeated here.
  • Step S401 The DRH determines a target processing signal.
  • Step S402 The DRH performs frequency conversion processing on the target processing signal to obtain a first frequency conversion signal.
  • Step S403 The DRH transmits the first frequency conversion signal to the antenna head end through a feeder cable.
  • Step S404 The antenna head end performs frequency conversion processing on the first frequency conversion signal to obtain a second frequency conversion signal.
  • the frequency of the second frequency conversion signal is within a second frequency range.
  • the second frequency range is a frequency range supported by the operator.
  • the antenna head end converts the first frequency-converted signal into a second frequency-converted signal whose frequency is within the second frequency range supported by the operator, so that the operator can successfully pass the operation even if the second frequency range supported by the operator changes.
  • the commercial network sends the second frequency conversion signal to the user terminal.
  • the second frequency range originally supported by the operator is (580MHz, 610MHz), and the second frequency range supported by the operator is changed to (610MHz, 640MHz).
  • the antenna head end can convert the first frequency conversion signal into a second frequency conversion signal having a frequency within a second frequency range (ie, (610MHz, 640MHz)) supported by the (modified) operator, so that The signal (ie, the second frequency-converted signal) transmitted by the antenna head end can be successfully transmitted through the operator's network.
  • a second frequency range ie, (610MHz, 640MHz)
  • the second frequency range may include one or more frequency bands.
  • the antenna head end can convert the first frequency conversion signal into a second frequency conversion signal having a frequency in the frequency band newly added by the operator, thereby effectively using The new frequency band.
  • the second frequency range originally supported by the operator includes a frequency band: (610MHz, 620MHz).
  • the operator has added a supported frequency range (810MHz, 820MHz), that is, the second frequency range includes two frequency bands: (610MHz, 620MHz) and (810MHz, 820MHz), if the frequency of the first frequency conversion signal received by the antenna head is 600M, the frequency of the first frequency conversion signal is in the frequency band newly added by the operator (ie (810MHz, 820MHz))
  • the second frequency-converted signal can effectively use the newly added frequency band. Therefore, by converting the first frequency-converted signal into a second frequency-converted signal whose frequency is within the second frequency range supported by the operator, it can better adapt to the scenario where the second frequency range supported by the operator changes.
  • the frequency of the first frequency conversion signal may be in both the first frequency range supported by the feeder cable and the second frequency range supported by the operator, that is, according to the first frequency range and the second frequency range. Intersection, determine the frequency of the first frequency-converted signal. For example, after DRH obtains the target processing signal, it can obtain the first frequency range and the second frequency range, calculate the intersection of the first frequency conversion range and the second frequency range, and convert the target processing signal to the frequency range corresponding to the intersection. Within the first frequency conversion signal.
  • the first frequency conversion signal may not be subjected to frequency conversion processing, and the first frequency conversion signal may be directly sent to the user terminal. In this way, frequency conversion processing can be performed only in the DRH, but not in the antenna head end, which is beneficial to reducing the design complexity of the antenna head end.
  • Step S405 The antenna head end transmits the second frequency conversion signal. Specifically, after the antenna head end receives the second frequency conversion signal, the second frequency conversion signal may be transmitted, so that the antenna in the terminal device receives the second frequency conversion signal.
  • the second frequency conversion signal may be a millimeter wave signal, and the second frequency range includes a frequency range corresponding to the millimeter wave, that is, the second frequency range includes 30 GHz to 300 GHz.
  • the antenna head end up-converts the first frequency-converted signal into a second frequency-converted signal with a frequency in the millimeter wave band. Because the higher the carrier frequency, the larger the achievable signal bandwidth is. Therefore, the frequency-converted second frequency-converted signal will be increased.
  • the transmission can effectively increase the signal bandwidth of the second frequency conversion signal, which is conducive to increasing the capacity of the DAS system.
  • FIG. 5 is a schematic flowchart of another signal processing method according to an embodiment of the present invention.
  • the method is applied to a DAS system.
  • the method includes, but is not limited to, steps S501 to S505.
  • steps S501 and S505 For the execution process, reference may be made to the detailed descriptions of step S301 in FIG. 3 and step S405 in FIG. 4 respectively, and details are not described herein.
  • Step S501 The DRH determines a target processing signal.
  • Step S502 The DRH transmits the target processing signal to the antenna head end through a feeder cable. Specifically, after the DRH obtains the target processing signal, it can directly send the target processing signal to the antenna head end. In an implementation manner, after the DRH obtains the target processing signal, the frequency of the target processing signal can be detected. If the frequency of the target processing signal is within the first frequency range, the DRH can directly transmit the target processing signal through the feeder cable. To the antenna head.
  • Step S503 The antenna head end determines the target transmission signal according to the target processing signal. Specifically, after receiving the target processing signal, the antenna head end may determine the target processing signal as a target transmission signal.
  • Step S504 The antenna head end performs a frequency conversion process on the target transmission signal to obtain a second frequency conversion signal.
  • the frequency of the second frequency conversion signal is within a second frequency range.
  • the second frequency range may be a frequency range supported by an operator.
  • the antenna head end converts the target transmission signal into a second frequency-converted signal with a frequency within the second frequency range supported by the operator, so that the operator can successfully pass the operator even if the second frequency range supported by the operator changes.
  • the network sends the second frequency-converted signal to the user terminal; or, in the case that the operator newly supports the frequency band (that is, the second frequency range changes), the newly-added frequency band can be effectively used.
  • the frequency of the target transmission signal can be detected. If the frequency of the target transmission signal is not in the second frequency range, the target transmission signal is converted into a frequency at the second frequency. A second frequency-converted signal in the frequency range. If the frequency of the target transmission signal is within the second frequency range, the antenna head end may directly transmit the target transmission signal without performing frequency conversion processing on the target transmission signal.
  • Step S505 The antenna head end transmits the second frequency conversion signal.
  • the target transmission signal may be subjected to frequency conversion processing by means of active frequency conversion, or the target transmission signal may be subjected to frequency conversion processing by means of passive frequency conversion.
  • the DAS system shown in FIG. 2 may further include a memory and a processor.
  • the memory is used to store program code, etc.
  • the processor may call the program code stored in the memory to control the antenna head to perform steps S503 to S505.
  • the antenna head end may include a passive frequency converter, and the passive frequency converter is used for frequency conversion processing of the target transmission signal to obtain a second frequency conversion signal.
  • FIG. 6 is a schematic flowchart of another signal processing method according to an embodiment of the present invention.
  • the method is applied to a DAS system, and the method includes, but is not limited to, the following steps:
  • Step S601 The antenna head determines a target processing signal. Specifically, the antenna head end may receive an uplink radio frequency signal from the terminal device, and determine the uplink radio frequency signal as a target processing signal. In an implementation manner, the antenna head end may generate first information and generate a target processing signal according to the first information, where the first information includes some parameter information of the antenna head end, such as an input impedance, a pattern, and the like.
  • Step S602 The antenna head performs frequency conversion processing on the target processing signal to obtain a first frequency conversion signal, where the frequency of the first frequency conversion signal is within a third frequency range supported by the feeder cable.
  • the third frequency range may be the same as or different from the first frequency range in step S302 in FIG. 3, which is not limited in the embodiment of the present invention.
  • the third frequency range is different from the first frequency range.
  • the third frequency range may be the same as or different from the first frequency range.
  • the antenna head end converts the target processing signal into a first frequency-converted signal with a frequency in the third frequency range, so that when the first frequency-converted signal is transmitted on the feeder cable, the loss generated during the transmission is extremely low, that is, it can be
  • the target processing signals of various frequencies are transmitted in the DAS system, and the original feeder cable is used to transmit the first frequency conversion signal without redeploying the feeder cable, which can benefit the old feeder cable and reduce costs.
  • the antenna head end when the antenna head end obtains the target processing signal, it can detect the frequency of the target processing signal. If the frequency of the target processing signal is not within the third frequency range, the target processing signal is converted. Processing, and transmitting the first frequency conversion signal obtained after the frequency conversion processing to the DRH through a feeder cable. If the frequency of the target processing signal is within the third frequency range, the antenna head can directly transmit the target processing signal to the DRH through a feeder cable.
  • Step S603 The antenna head transmits the first frequency conversion signal to the DRH through a feeder cable.
  • the antenna head end may transmit the first frequency conversion signal to the DRH through a feeder cable, so that the DRH processes the received first frequency conversion signal and sends the processed signal to the base station.
  • Step S604 The DRH sends the first frequency conversion signal to the base station. Specifically, after receiving the first frequency conversion signal, the DRH may directly send the first frequency conversion signal to the base station, that is, the DRH may not perform frequency conversion processing on the first frequency conversion signal.
  • the DAS system when the DAS system includes a DCU (not shown in FIG. 2), after receiving the first frequency conversion signal, the DRH may further perform analog-to-digital conversion on the first frequency conversion signal to obtain a digital communication signal, and This digital communication signal is sent to the DCU.
  • the signal processing methods disclosed in the embodiments of the present invention can be applied to DAS systems with different architectures (such as DAS systems including DCUs and DAS systems not including DCUs), and make the DAS systems with different architectures equally available.
  • Target processing signals of various frequencies can be transmitted.
  • the DRH may perform frequency conversion processing on the first frequency conversion signal.
  • the method is applied to a DAS system, and the method includes, but is not limited to, steps S701 to S705, and the execution processes of steps S701 to S703 can be respectively referred to in FIG.
  • the detailed description of steps S601 to S603 in step 6 is not repeated here.
  • Step S701 The antenna head determines a target processing signal.
  • Step S702 the antenna head performs frequency conversion processing on the target processing signal to obtain a first frequency conversion signal
  • Step S703 The antenna head transmits the first frequency conversion signal to the DRH through a feeder cable.
  • Step S704 The DRH performs frequency conversion processing on the first frequency conversion signal to obtain a second frequency conversion signal.
  • the frequency of the second frequency conversion signal is within a fourth frequency range.
  • the fourth frequency range may be a frequency range supported by the base station.
  • DRH converts the first frequency-converted signal into a second frequency-converted signal with a frequency within the fourth frequency range supported by the base station, so that the base station can successfully receive the second frequency-converted signal from DRH, which is beneficial to the old base station.
  • the fourth frequency range supported by the base station a is (850MHz, 900MHz), and the frequency of the first frequency conversion signal received by the DRH is 2.1G
  • the DRH does not perform frequency conversion processing on the first frequency conversion signal, it directly directly changes the first frequency conversion signal. Since the frequency-converted signal is sent out, since the frequency of the first frequency-converted signal is not within the fourth frequency range supported by the base station a, the base station a cannot receive the first frequency-converted signal sent by the DRH. If a new base station b is newly set up to receive the first frequency conversion signal, the cost will be increased.
  • the frequency of the first frequency conversion signal is within the frequency range supported by the newly installed base station b.
  • a second frequency conversion signal having a frequency in a fourth frequency range supported by the base station can be obtained, so that the base station can successfully receive the second frequency conversion signal sent by the DRH.
  • Step S705 The DRH sends the second frequency conversion signal to the base station. Specifically, after the DRH obtains the second frequency conversion signal, it can send the second frequency conversion signal to the base station. In an implementation manner, after the DRH obtains the second frequency conversion signal, the second frequency conversion signal may be analog-to-digital converted to obtain a digital communication signal, and the digital communication signal is sent to the DCU.
  • FIG. 8 is a schematic flowchart of another signal processing method according to an embodiment of the present invention.
  • the method is applied to a DAS system.
  • the method includes, but is not limited to, steps S801 to S804.
  • steps S801 and S804 For the execution process, reference may be made to the detailed descriptions of step S601 in FIG. 6 and step S705 in FIG. 7 respectively, and details are not described herein.
  • Step S801 The antenna head determines a target processing signal.
  • Step S802 The antenna head transmits the target processing signal to the DRH through a feeder cable.
  • the antenna head end after the antenna head end obtains the target processing signal, it can directly send the target processing signal to the DRH.
  • the frequency of the target processing signal can be detected. If the frequency of the target processing signal is within the third frequency range supported by the feeder, the antenna head end can directly The target processing signal is transmitted to the DRH through a feeder cable.
  • Step S803 The DRH performs frequency conversion processing on the target processing signal to obtain a second frequency conversion signal.
  • the frequency of the second frequency conversion signal is within a fourth frequency range.
  • the fourth frequency range may be a frequency range supported by the base station.
  • the DRH converts the target processing signal into a second frequency-converted signal with a frequency within the fourth frequency range supported by the base station, so that the base station can successfully receive the second frequency-converted signal from the DRH, which is beneficial to the old base station.
  • Step S804 The DRH sends the second frequency conversion signal to the base station.
  • the antenna head end Signals (such as the first frequency-converted signal and the target transmission signal) can be converted to obtain a second frequency-converted signal that matches the frequency of the operator through frequency conversion processing, and can also be used when the second frequency range supported by the operator changes.
  • the second frequency conversion signal is successfully sent to the user terminal through the operator's network, or, in the case that the operator adds a new supported frequency band, the newly added frequency band can be effectively used; in the third aspect, in the uplink direction, for the to-be-sent
  • the signal to the base station can be converted into a second frequency-converted signal with a frequency matching the base station through frequency conversion processing. Receives the second converted signal, so as to benefit the old base station.
  • a target processing signal that could not be transmitted in the DAS system can be made to be better transmitted in the DAS system after frequency conversion.
  • the DAS system shown in FIG. 2 may be a full-duplex system, that is, when a DRH receives a downlink processing signal from a base station (or DCU), it may perform frequency conversion processing on the downlink processing signal. , And the down-converted signal obtained after the frequency conversion processing is sent to the antenna head end through a feeder cable. If the DRH also receives an uplink processing signal from the antenna head at this time, the DRH can perform frequency conversion processing on the uplink processing signal at the same time. After receiving the down-converted signal sent by the DRH, the antenna head end may perform a frequency conversion process on the down-converted signal, and send the signal obtained after the frequency conversion process to the user terminal.
  • the antenna head end can also perform frequency conversion processing on the uplink processing signal at the same time, and send the uplink frequency conversion signal obtained after the frequency conversion processing to the DRH through the feeder cable (As long as the frequency of the down-converted signal and the up-converted signal transmitted on the feeder cable are in different frequency bands).
  • FIG. 9 is a schematic flowchart of another signal processing method according to an embodiment of the present invention.
  • the method is applied to a DAS system.
  • the method includes, but is not limited to, the following steps:
  • Step S901 The DRH determines a target processing signal, and the target processing signal may include a first target processing signal and a second target processing signal.
  • the first target processing signal and the second target processing signal may be determined according to signals transmitted by different base stations.
  • the DRH may receive signals from different base stations (such as a first target processing signal and a second target processing signal), and convert signals from different base stations into first frequency-variable signals with different frequencies. , And the first variable frequency signals with different frequencies are transmitted on the feeder cable to increase the capacity of the DAS system.
  • the DRH may determine a processing signal whose frequency is not within the first frequency range as a target processing signal. Further, DRH can perform frequency conversion processing on a target processing signal.
  • the first frequency range is a frequency range supported by the original feeder cable in the DAS system.
  • the DRH may also directly send a processed signal with a frequency within the first frequency range (that is, does not undergo frequency conversion processing) to the antenna head end. For example, if the DRH receives three processed signals, the three processed signals are: a first signal, a second signal, and a third signal, where the frequencies of the first signal and the second signal are not in the first frequency range.
  • the frequency of the third signal is within the first frequency range, then the DRH may determine the first signal and the second signal as target processing signals, perform frequency conversion processing on the first signal and the second signal, and convert the first signal obtained after the frequency conversion processing to the first signal.
  • the frequency-converted signal and the second frequency-converted signal are sent to the antenna head end.
  • the DRH may directly send it to the antenna head-end without performing frequency conversion processing.
  • Step S902 The DRH performs frequency conversion processing on the first target processing signal and the second target processing signal respectively to obtain two first frequency conversion signals.
  • the frequencies of the two first frequency-converted signals are both within the first frequency range, and the frequencies of the two first frequency-converted signals are different.
  • DRH converts the first target processing signal and the second target processing signal into two first frequency-converted signals with different frequencies.
  • transmission on the feeder cable can effectively reduce the interference generated during transmission on the feeder cable, which is conducive to improving communication quality.
  • the capacity of the DAS system can be increased to twice the original capacity by transmitting two first frequency conversion signals in the feeder cable at the same time.
  • the frequencies of the two first frequency conversion signals may belong to two different frequency bands in the first frequency range.
  • the DRH may convert the first target processing signal into a first frequency-converted signal having a frequency in the first frequency band, and convert the second target processing signal into A first frequency conversion signal having a frequency in a second frequency band, wherein the first frequency band and the second frequency band are two different frequency bands in the first frequency range.
  • the frequencies of the first target processing signal and the second target processing signal may be the same or different, but the frequencies of the two first frequency conversion signals obtained after the frequency conversion processing must be different.
  • the above-mentioned first frequency conversion signals of two different frequency bands transmitted on the feeder cable at the same time are for example only, and do not constitute a limitation on the embodiment of the present invention.
  • three, five, or other numbers of first frequency conversion signals in different frequency bands can also be transmitted on the feeder cable at the same time to increase the capacity of the DAS system to three or five times the original capacity. Or other multiples. Therefore, the capacity of the DAS system can be effectively increased by transmitting the first frequency conversion signals belonging to different frequency bands on the feeder at the same time.
  • Step S903 The DRH transmits the two first frequency-converted signals to the antenna head end through a feeder cable.
  • the DRH may convert the first frequency conversion signal through a feeder cable.
  • A is transmitted to the first antenna head end
  • the first frequency conversion signal B is transmitted to the second antenna head end through a feeder cable.
  • the first antenna head end has a corresponding relationship with the first frequency conversion signal A, that is, only the first antenna head end can obtain the first frequency conversion signal A.
  • the second antenna head end has a corresponding relationship with the first frequency conversion signal B. That is, only the first antenna head can obtain the first frequency-converted signal B.
  • Step S904 the antenna head end filters the two first frequency conversion signals to obtain a target frequency conversion signal.
  • the antenna head end may receive two first frequency conversion signals from the DRH, and filter the two first frequency conversion signals to obtain a first frequency conversion signal.
  • the antenna head end may determine the filtered first frequency conversion signal as a target. Variable frequency signal.
  • the DRH transmits the two first frequency-converted signals to the first antenna head end (and the second antenna head end) and the first antenna head end (and the second antenna head end) connected to the DRH through a feeder cable.
  • the two first frequency-converted signals can be filtered to obtain a first frequency-converted signal (ie, the first target transmission signal), and the first frequency-converted signal is determined as the first target frequency-converted signal.
  • the first end of the second antenna may also determine a first frequency-converted signal obtained by filtering as the second target frequency-converted signal.
  • the first antenna head end (or the second antenna head end) can filter one of the two first frequency conversion signals to obtain a first frequency conversion signal and filter out the other first frequency conversion signal, so that the first antenna head end only needs to Processing one first frequency-converted signal (the other first frequency-converted signal can be processed by the second antenna head end) is beneficial to reduce the overhead in a single antenna head end.
  • the first target frequency conversion signal transmitted by the first antenna head end and the second target frequency conversion transmitted by the second antenna head end when there is an overlapping area between the coverage areas of the first antenna head end and the second antenna head end, the first target frequency conversion signal transmitted by the first antenna head end and the second target frequency conversion transmitted by the second antenna head end.
  • the frequencies of the signals are different.
  • multiple antenna heads need to be deployed in the same small area (at this time, the coverage areas of multiple antenna heads have overlapping areas) to meet
  • the frequency of the target frequency-converted signals radiated by the multiple antenna heads is the same, serious interference will occur and the communication quality will decrease. If the frequencies of the target frequency-converted signals radiated by the multiple antenna heads are different, the interference can be effectively reduced, thereby improving the communication quality.
  • Step S905 The antenna head end performs a frequency conversion process on the target frequency conversion signal to obtain a second frequency conversion signal, wherein the frequency of the second frequency conversion signal is within a second frequency range supported by the operator.
  • the antenna head end may perform frequency conversion processing on the target frequency converted signal according to the new frequency band supported by the operator, so that the frequency of the obtained second frequency converted signal is in the new frequency band to make full use of it.
  • the new frequency band When the frequency band supported by the operator is increased or changed, the antenna head end may perform frequency conversion processing on the target frequency converted signal according to the new frequency band supported by the operator, so that the frequency of the obtained second frequency converted signal is in the new frequency band to make full use of it. The new frequency band.
  • the antenna head end can perform the frequency conversion processing on the target frequency conversion signal to obtain the second frequency conversion signal in the frequency band newly added by the operator (that is, the third frequency band [2.1G, 2.2G]), such as the second frequency conversion signal.
  • the frequency is 2.1G.
  • Step S906 The antenna head transmits a second frequency-converted signal.
  • the first target processing signal and the second target processing signal that could not be transmitted in the original feeder cable can be transmitted in the original feeder cable with lower loss after frequency conversion, that is, it can be Target processing signals of various frequencies are transmitted in the DAS system.
  • the DAS can be effectively increased. System capacity.
  • FIG. 10 is a schematic flowchart of another signal processing method according to an embodiment of the present invention.
  • the method is applied to a DAS system.
  • the method includes, but is not limited to, steps S1001 to S1013. Among them, steps S1001 to S1002.
  • For the execution process please refer to the detailed descriptions of steps S901 to S902 in FIG. 9, which are not repeated here.
  • Step S1001 The DRH receives a target processing signal, and the target processing signal includes a first target processing signal, a second target processing signal, and a third target processing signal.
  • the first target processing signal, the second target processing signal, and the third target processing signal are signals transmitted by different base stations (such as the first base station, the second base station, and the third base station).
  • the frequencies of the first target processing signal, the second target processing signal, and the third target processing signal are independent of each other, and may be the same or different.
  • the frequency of the first target processing signal and the second target processing signal are both 2.1G
  • the frequency of the third target processing signal is 800M.
  • Step S1002 The DRH performs frequency conversion processing on the first target processing signal and the second target processing signal respectively to obtain two first frequency conversion signals. Specifically, the DRH may convert the first target processing signal into a first converted signal A having a frequency in the first frequency band, and convert the second target processing signal into a first converted signal B having a frequency in the second frequency band, and is not correct.
  • the third target processing signal performs any processing, wherein the frequency of the third target processing signal is in the third frequency band, and the first frequency band, the second frequency band, and the third frequency band are three different frequency bands in the first frequency range supported by the feeder. .
  • the first frequency range supported by the feeder cable is 550M ⁇ 850M (that is, when the frequency of the signal transmitted on the feeder cable falls within the 550M ⁇ 850M frequency range, the loss generated during the transmission process is extremely small)
  • the first target processing signal (frequency 2.1G) can be converted into a first frequency conversion signal A with a frequency of 600M
  • the second target processing signal (frequency 2.1G) can be converted into a first frequency conversion signal B with a frequency of 700M.
  • the frequency conversion processing is not performed on the third target processing signal, and the frequency of the third target processing signal remains unchanged, which is 800M, among which 600M, 700M, and 800M are in different frequency bands.
  • Step S1003 The DRH transmits the first frequency conversion signal A, the first frequency conversion signal B, and the third target processing signal to the first antenna head end through the feeder cable.
  • Step S1004 The DRH transmits the first frequency conversion signal A, the first frequency conversion signal B, and the third target processing signal to the second antenna head end through the feeder cable.
  • Step S1005 The DRH transmits the first frequency conversion signal A, the first frequency conversion signal B, and the third target processing signal to the third antenna head end through the feeder cable.
  • the DRH transmits the first frequency conversion signal A, the first frequency conversion signal B, and the third target processing signal to the first antenna head end, the second antenna head end, and the third antenna head end are for example only, and are not This constitutes a limitation on the embodiment of the present invention. In other feasible implementation manners, the DRH may transmit the first frequency conversion signal A, the first frequency conversion signal B, and the third target processing signal to two, four, five, six, or other numbers of different antenna heads.
  • steps S1003, S1004, and S1005 is in no particular order. For example, step S1003 may be performed first, then step S1004, and step S1005 may be performed last, or steps S1003, S1004, and S1005 may be performed simultaneously. It should be noted that the above are just examples, not exhaustive.
  • Step S1006 The first antenna head filters the first frequency-converted signal A, the first frequency-converted signal B, and the third target processed signal to obtain a first target frequency-converted signal A.
  • Step S1007 The second antenna head filters the first frequency-converted signal A, the first frequency-converted signal B, and the third target processed signal to obtain a first target frequency-converted signal B.
  • Step S1008 The third antenna head filters the first frequency conversion signal A, the first frequency conversion signal B, and the third target processing signal to obtain a third target transmission signal.
  • the first frequency conversion signal A may be processed.
  • the first frequency conversion signal B and the third target processing signal are filtered to obtain a first target frequency conversion signal A (or a first target frequency conversion signal B and a third target transmission signal).
  • the first target frequency conversion signal A (or the first target frequency conversion signal B and the third target transmission signal) may be any one of the first frequency conversion signal A, the first frequency conversion signal B, and the third target processing signal.
  • the present invention The embodiment is not limited thereto.
  • the first antenna head end may filter the first frequency conversion signal A, the first frequency conversion signal B, and the third target processing signal through a filter.
  • the filter may include a low-pass, high-pass, band-pass, or band-stop filter, and the type of the filter is not limited in the embodiment of the present invention.
  • the first antenna head end responds to the first frequency conversion signal A (frequency 600M), the first frequency conversion signal B (frequency 700M), and the first The three target processing signals (frequency is 800M) are filtered, and the frequency of the first target frequency conversion signal A obtained is 600M, that is, the first target frequency conversion signal A is the first frequency conversion signal A.
  • the second antenna head end responds to the first frequency conversion signal A (frequency 600M), the first frequency conversion signal B (frequency 700M), and The third target processed signal (with a frequency of 800M) is filtered, and the frequency of the first target converted signal B obtained is 700M, that is, the first target converted signal B is the first converted signal B.
  • the third antenna head end responds to the first frequency conversion signal A (frequency 600M), the first frequency conversion signal B (frequency 700M), and The third target processing signal (frequency is 800M) is filtered, and the frequency of the third target transmission signal obtained is 800M, that is, the third target transmission signal is the third target processing signal.
  • the passbands of the band-pass filters of the first antenna head end, the second antenna head end, and the third antenna head end are different only for examples, and do not constitute a limitation on the embodiments of the present invention. In other feasible implementation manners, the passbands of the band-pass filters of the first antenna head end, the second antenna head end, and the third antenna head end may be the same.
  • steps S1006, S1007, and S1008 are in no particular order. Step S1006 may be performed first, then step S1007, and step S1008 may be performed last, or steps S1006, S1007, and S1008 may be performed simultaneously. It should be noted that the above are just examples, not exhaustive.
  • Step S1009 The first antenna head end performs frequency conversion processing on the first target frequency conversion signal A to obtain a second frequency conversion signal A.
  • the frequency of the first target variable frequency signal A and the frequency range supported by the first operator may be obtained.
  • the first antenna head end may perform frequency conversion processing on the first target frequency-converted signal A to obtain a second frequency-converted signal A having a frequency within the frequency range supported by the first operator.
  • the first antenna head end may The first target frequency-converted signal A is up-converted to obtain a second frequency-converted signal A, where the frequency of the second frequency-converted signal A can be any frequency in [2.0G, 2.2G], such as 2.1G. In this way, the first antenna head end can convert the frequency of the first target frequency conversion signal A back to the frequency of the first target processing signal (frequency is 2.1G).
  • Step S1010 The third antenna head performs frequency conversion processing on the third target transmission signal to obtain a second frequency conversion signal B.
  • the third antenna head end after the third antenna head end obtains the third target transmission signal, it can obtain the frequency range supported by the third operator. If the frequency of the third target transmission signal is not within the frequency range supported by the third operator, the first The three antenna heads may perform frequency conversion processing on the third target transmission signal to obtain a second frequency conversion signal B having a frequency within a frequency range supported by the third operator.
  • the third antenna head end may convert the third target transmission signal (800M) into a second frequency-converted signal B having a frequency in any frequency band supported by the third operator.
  • the frequency of the second frequency-converted signal B is 2.1 G.
  • some of the antenna heads may convert the received signal into a frequency-converted signal with a frequency in the first frequency band, and some antenna heads
  • the terminal can convert the received signal into a frequency-converted signal with a frequency in the second frequency band, and the remaining antenna head can convert the received signal into a frequency-converted signal with a frequency in the third frequency band.
  • two of the six antenna heads can convert the received signal into a frequency-converted signal in the first frequency band, and the other two antennas can convert the received signal into a frequency-converted frequency in the second frequency band.
  • Signal, the remaining 2 antennas can convert the received signal into a frequency-converted signal with a frequency in the third frequency band.
  • DRH can first convert the signal from the base station to a low frequency band for transmission on the feeder cable, and the antenna head end receives the frequency conversion After the signal is converted into a frequency-converted signal in a higher frequency band held by an operator.
  • the three frequency bands are the first frequency band [700M, 720M], the second frequency band [900M, 920M], the third frequency band [28G, 28.2G], and the base station.
  • DRH can perform frequency conversion processing on the target processing signal to obtain a first frequency conversion signal with a frequency within the frequency range supported by the feeder cable, and place the first frequency conversion signal on the feeder cable.
  • the first frequency conversion signal may be converted into a second frequency conversion signal in a higher frequency band (ie, the third frequency band) held by the operator, such as after frequency conversion.
  • the frequency of the obtained second frequency conversion signal is 28G.
  • steps S1009 and S1010 are not chronological. For example, step S1009 may be performed first, and then step S1010 may be performed, or steps S1009 and S1010 may be performed simultaneously. It should be noted that the above are just examples, not exhaustive.
  • Step S1011 The first antenna head sends the second frequency-converted signal A to the user terminal.
  • Step S1012 The second antenna head end sends the first target frequency-converted signal B to the user terminal. If the frequency of the first target frequency converted signal B is within the frequency range supported by the second operator, the second antenna head end may not perform the frequency conversion processing on the second target frequency converted signal, and directly sends the first target frequency converted signal B to User terminal.
  • the second antenna head end can The first target frequency conversion signal B is not subjected to frequency conversion processing, and the first target frequency conversion signal B is directly sent to the user terminal. In this way, the overhead generated by the second antenna head end performing unnecessary frequency conversion processing on the first target frequency converted signal B can be avoided.
  • first operator, second operator, and third operator may be the same operator or different operators.
  • the signal processing method disclosed in the embodiment of the present invention can enable data of different operators to be transmitted in the DAS system at the same time.
  • Step S1013 The third antenna head sends the second frequency-converted signal B to the user terminal.
  • the second frequency conversion signal A, the first target frequency conversion signal B, and the second frequency conversion signal B shown in FIG. 10 are sent to the same user terminal for example only.
  • the first The two frequency-converted signals A, the first target frequency-converted signal B, and the second frequency-converted signal B are sent to different user terminals, which are not limited in this embodiment of the present invention.
  • steps S1011, S1012, and S1013 are in no particular order.
  • step S1011 may be performed first, then step S1012, and step S1013 may be performed last.
  • steps S1011, S1012, and S1013 may be performed simultaneously. It should be noted that the above are just examples, not exhaustive.
  • FIG. 11 is a schematic flowchart of another signal processing method according to an embodiment of the present invention.
  • the method is applied to a DAS system.
  • the method includes, but is not limited to, the following steps:
  • Step S1101 Determine a target processing signal.
  • Step S1102 Perform frequency conversion processing on the target processing signal to obtain a first frequency conversion signal, so that the first frequency conversion signal is transmitted between the DRH and the antenna head end through a feeder cable.
  • the above steps may be performed by DRH.
  • the execution process refer to the specific description corresponding to DRH in the embodiments shown in FIG. 3 to FIG. 10 above, and details are not described herein.
  • the foregoing steps may be performed by an antenna head end, and an implementation process thereof may refer to a specific description corresponding to the antenna head end in the embodiments shown in FIG. 3 to FIG. 10 above, and details are not described herein.
  • the above steps may also be performed by a special frequency conversion device, which may be located between the base station and the DRH, that is, after the special frequency conversion device receives the target processing signal from the base station, it may process the signal on the target. Frequency conversion processing is performed, and the first frequency conversion signal obtained after the frequency conversion processing is sent to the DRH for subsequent transmission.
  • the dedicated frequency conversion device may be located between the DRH and the feeder cable shown in FIG.
  • the DRH may send the target processing signal to the dedicated frequency conversion device (that is, DRH
  • the target processing signal is not subjected to frequency conversion processing), so that the special frequency conversion device performs frequency conversion processing on the target processing signal, and sends the first frequency conversion signal obtained after the frequency conversion processing to the antenna head end.
  • the embodiment of the present invention does not limit the position of the dedicated frequency conversion equipment.
  • FIG. 12 is a schematic structural diagram of a signal processing device according to an embodiment of the present invention.
  • the signal processing device 120 is configured to perform steps performed by the DRH in the method embodiments corresponding to FIG. 3 to FIG. 11.
  • the processing device 120 may include:
  • the determining module 1201 is configured to determine a target processing signal.
  • the processing module 1202 is configured to perform frequency conversion processing on the target processing signal to obtain a first frequency conversion signal.
  • the frequency of the first frequency conversion signal is within a first frequency range supported by the feeder cable, and the first frequency conversion signal is transmitted to the antenna head end through the feeder cable.
  • the target processing signal may include a first target processing signal and a second target processing signal.
  • the processing module 1202 is specifically configured to perform frequency conversion processing on the first target processing signal and the second target processing signal respectively to obtain two first frequency conversion signals; wherein the frequencies of the two first frequency conversion signals are at the first frequency. Within the range, and the frequencies of the two first frequency conversion signals are different.
  • the frequency of the target processing signal may not be within the first frequency range.
  • the target processing signal may be a millimeter wave signal.
  • the determining module 1201 is specifically configured to receive a digital communication signal from the distributed antenna system control unit DCU, perform digital-to-analog conversion on the digital communication signal, and determine a target processing signal.
  • FIG. 13 is a schematic structural diagram of another signal processing apparatus according to an embodiment of the present invention.
  • the signal processing apparatus 130 is configured to perform steps performed by an antenna head end in the method embodiments corresponding to FIG.
  • the signal processing device 130 may include:
  • a determining module 1301 is configured to determine a target transmission signal.
  • the processing module 1302 is configured to perform frequency conversion processing on the target transmission signal to obtain a second frequency conversion signal, and a frequency of the second frequency conversion signal is within a second frequency range supported by an operator.
  • the transmitting module 1303 is configured to transmit a second frequency conversion signal.
  • the determining module 1301 is specifically configured to receive a transmission signal from the DRH and filter the transmission signal to obtain a target transmission signal.
  • the foregoing transmission signal may be a first frequency conversion signal processed by frequency conversion of DRH.
  • the second frequency conversion signal may be a millimeter wave signal.
  • FIG. 14 is a schematic structural diagram of a signal processing device according to an embodiment of the present invention.
  • the signal processing device 140 includes a processor 1401 and a memory 1402, and the processor 1401 and the memory 1402 communicate through one or more channels. Bus connection.
  • the processor 1401 is configured to perform functions corresponding to the DRH in the methods described in FIG. 3 to FIG. 11.
  • the processor 1401 may be a central processing unit (CPU), a network processor (NP), a hardware chip, or any combination thereof.
  • the memory 1402 is used to store program code and the like.
  • the memory 1402 may include volatile memory (such as random access memory (RAM); the memory 1402 may also include non-volatile memory (non-volatile memory), such as read-only memory (read-memory) only memory (ROM), flash memory (flash memory), hard disk (HDD) or solid-state drive (SSD); the memory 1402 may also include a combination of the above types of memories.
  • volatile memory such as random access memory (RAM)
  • non-volatile memory such as read-only memory (read-memory) only memory (ROM), flash memory (flash memory), hard disk (HDD) or solid-state drive (SSD)
  • ROM read-only memory
  • flash memory flash memory
  • HDD hard disk
  • SSD solid-state drive
  • the processor 1401 may call the program code stored in the memory 1402 to perform the following operations:
  • the frequency of the first frequency conversion signal is within the first frequency range supported by the feeder cable, and the first frequency conversion signal is transmitted to the antenna head of the distributed antenna system through the feeder cable.
  • the processor 1401 may also perform operations corresponding to DRH in the embodiments shown in FIG. 3 to FIG. 11. For details, refer to the description in the method embodiment, and details are not described herein again.
  • the signal processing device described in the embodiment corresponding to FIG. 14 may be a DRH.
  • FIG. 15 is a schematic structural diagram of another signal processing apparatus according to an embodiment of the present invention.
  • the signal processing apparatus 150 includes: an antenna head end 1501, a processor 1502, and a memory 1503.
  • the processor 1502 and the memory 1503 are connected through one or more communication buses.
  • the processor 1502 may be a central processing unit (CPU), a network processor (NP), a hardware chip, or any combination thereof.
  • CPU central processing unit
  • NP network processor
  • the processor 1502 may be a central processing unit (CPU), a network processor (NP), a hardware chip, or any combination thereof.
  • the memory 1503 is used to store program code and the like.
  • the memory 1503 may include volatile memory (for example, random access memory (RAM); the memory 1503 may also include non-volatile memory (for example, read-only memory) only memory (ROM), flash memory (flash memory), hard disk (HDD) or solid-state drive (SSD); the memory 1503 may also include a combination of the above types of memories.
  • the processor 1502 may call the program code stored in the memory 1503 to control the antenna head end 1501 to perform the following operations:
  • a second variable frequency signal is transmitted.
  • the antenna head end 1501 may also perform operations corresponding to the antenna head end in the embodiments shown in FIG. 3 to FIG. 11. For details, refer to the description in the method embodiment, and details are not described herein again.
  • An embodiment of the present invention further provides a DAS system.
  • the DAS system includes the foregoing signal processing device shown in FIG. 12 or FIG. 14 and the foregoing signal processing device shown in FIG. 13 or FIG. 15.
  • An embodiment of the present invention further provides a computer-readable storage medium, which can be used to store computer software instructions used by the signal processing device in the embodiment shown in FIG. 12 or FIG. program of.
  • An embodiment of the present invention further provides a computer-readable storage medium that can be used to store computer software instructions used by the signal processing apparatus in the embodiment shown in FIG. 13 or FIG. 15, and includes instructions for executing the antenna head end in the foregoing embodiment. Designed procedures.
  • the computer-readable storage medium includes, but is not limited to, a flash memory, a hard disk, and a solid state hard disk.
  • An embodiment of the present invention also provides a computer program product.
  • the computer product When the computer product is run by a computing device, the computer product can execute the signal processing method designed for the DRH in the embodiments of FIG. 3 to FIG. 11.
  • An embodiment of the present invention also provides a computer program product.
  • the computer product When the computer product is run by a computing device, the computer product can execute the signal processing method designed for the antenna head end in the embodiments shown in FIG. 3 to FIG. 11.
  • a chip including a processor and a memory.
  • the memory includes a processor and a memory.
  • the memory is used to store a computer program.
  • the processor is used to call and run the computer program from the memory.
  • a computer program is used to implement the method in the above method embodiment.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium, or transmitted through the computer-readable storage medium.
  • the computer instructions can be transmitted from one website site, computer, server, or data center to another website site by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) , Computer, server, or data center.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, a data center, or the like that includes one or more available medium integration.
  • the usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state disk (Solid State Disk)).

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne, dans des modes de réalisation, un procédé de traitement de signal, un appareil pour mettre en œuvre le procédé, et un système d'antennes distribuées. Le système d'antennes distribuées peut être appliqué à une zone à faible couverture de réseau, et améliorer le taux de couverture et la qualité des communications dans la zone. Le procédé mis en oeuvre dans les modes de réalisation de l'invention permet d'effectuer un traitement de conversion de fréquence sur un signal de traitement cible, et d'obtenir un premier signal de conversion de fréquence présentant, dans une première gamme de fréquences, une fréquence prise en charge par un câble d'alimentation, de sorte que le premier signal de conversion de fréquence présente une perte inférieure lorsqu'il est transmis sur le câble d'alimentation, c'est-à-dire que la mise en oeuvre des modes de réalisation de l'invention permet de mieux transmettre le signal dans un système d'antennes distribués.
PCT/CN2019/088776 2018-05-30 2019-05-28 Procédé et appareil de traitement de signal, système d'antennes distribuées et support de stockage WO2019228338A1 (fr)

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CN201810544411.5A CN110557183A (zh) 2018-05-30 2018-05-30 一种信号处理方法、装置、分布式天线系统及存储介质

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US20080310456A1 (en) * 2007-04-11 2008-12-18 Interuniversitair Microelektronica Centrum (Imec) Communication System over a Power Line Distribution Network
CN104468443A (zh) * 2013-09-16 2015-03-25 芯迪半导体科技（上海）有限公司 一种电力线通信系统窄带干扰除去装置及方法
CN107211378A (zh) * 2014-11-06 2017-09-26 康普技术有限责任公司 具有动态容量分配和功率调整的分布式天线系统

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CN103957180B (zh) * 2014-05-13 2018-09-28 西安华为技术有限公司 数字预失真拉远的方法、装置及系统
EP3266128B1 (fr) * 2015-03-04 2021-11-10 Commscope Technologies LLC Annulation de sous-produit d'intermodulation dans un ou plusieurs noeuds d'un système d'antennes distribuées
CN106550371A (zh) * 2015-09-23 2017-03-29 中兴通讯股份有限公司 一种多信源接入方法及系统

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US20080310456A1 (en) * 2007-04-11 2008-12-18 Interuniversitair Microelektronica Centrum (Imec) Communication System over a Power Line Distribution Network
CN104468443A (zh) * 2013-09-16 2015-03-25 芯迪半导体科技（上海）有限公司 一种电力线通信系统窄带干扰除去装置及方法
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