WO2019228338A1

WO2019228338A1 - Signal processing method and apparatus, distributed antenna system and storage medium

Info

Publication number: WO2019228338A1
Application number: PCT/CN2019/088776
Authority: WO
Inventors: 聂广材; 孟祥涛
Original assignee: 华为技术有限公司
Priority date: 2018-05-30
Filing date: 2019-05-28
Publication date: 2019-12-05
Also published as: CN110557183A

Abstract

Disclosed in the embodiments of the present invention are a signal processing method, an apparatus for implementing the method, and a distributed antenna system. The distributed antenna system can be applied to an area with poor network coverage and improve the coverage rate and communication quality of the area. The method provided in the embodiments of the present invention can perform frequency conversion processing on a target processing signal, and obtain a first frequency conversion signal with a frequency within a first frequency range supported by a feeder cable, so that the first frequency conversion signal has a lower loss when being transmitted on the feeder cable, i.e., by implementing the embodiments of the present invention, the signal can be better transmitted in a distributed antenna system.

Description

Signal processing method, device, distributed antenna system and storage medium

Technical field

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.

Background technique

Distributed antenna system (Distributed Antenna System, DAS) is distributed in a certain building or area. It is a preferred solution for extending the coverage of communication networks. It can be widely used in blind areas, weak areas and temporary coverage that are difficult to cover. Demand places to improve communication quality.

In the scenario where the DAS system is used indoors, 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.

Summary of the Invention

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.

According to a first aspect, 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. Signal, wherein 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.

In this technical solution, 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.

In an implementation manner, 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.

In this technical solution, by converting the first target processing signal and the second target processing signal into two first frequency-converted signals with different frequencies, it is possible to effectively reduce the time when two first frequency-converted signals are transmitted on the feeder at the same time. The interference generated is conducive to improving communication quality. In addition, compared with the method of transmitting one first frequency conversion signal in the feeder cable, by transmitting two first frequency conversion signals in the feeder cable at the same time, the capacity of the DAS system can be increased to twice the original capacity.

In an implementation manner, the frequency of the foregoing target processing signal may not be within the first frequency range.

In this technical solution, it is possible to perform frequency conversion processing only on a target processing signal that needs to be converted, instead of performing frequency conversion processing on a signal that does not need to be converted (that is, a signal having a frequency in a first frequency range), which is beneficial to improving the DAS system. Processing efficiency to avoid unnecessary overhead.

In an implementation manner, the foregoing target processing signal may be a millimeter wave signal.

In this technical solution, when the target processing signal is 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.

In an implementation manner, 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.

In this technical solution, 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.

In a second aspect, 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.

In this technical solution, 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.

In an implementation manner, 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.

In this technical solution, 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 .

In an implementation manner, the foregoing transmission signal may be a first frequency conversion signal processed by frequency conversion of DRH.

In this technical solution, 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.

In an implementation manner, the foregoing second frequency conversion signal may be a millimeter wave signal.

In this technical solution, 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.

In a third aspect, 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.

In a fourth aspect, 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.

In a fifth aspect, 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.

According to a sixth 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.

According to a seventh 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.

According to an eighth 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.

In a ninth 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 second aspect when the program is executed.

According to a tenth aspect, 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.

According to an eleventh aspect, 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.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly explain the technical solutions in the embodiments of the present invention or the background art, the drawings that are needed in the embodiments of the present invention or the background art will be described below.

FIG. 1 is a schematic structural diagram of a DAS system disclosed by an embodiment of the present invention; FIG.

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;

4 is a schematic flowchart of another signal processing method disclosed by an embodiment of the present invention;

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.

FIG. 7 is a schematic flowchart of another signal processing method according to an embodiment of the present invention; FIG.

FIG. 8 is a schematic flowchart of another signal processing method according to an embodiment of the present invention; FIG.

FIG. 9 is a schematic flowchart of another signal processing method according to an embodiment of the present invention; FIG.

FIG. 10 is a schematic flowchart of another signal processing method according to an embodiment of the present invention; FIG.

FIG. 11 is a schematic flowchart of another signal processing method according to an embodiment of the present invention; FIG.

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;

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.

Detailed ways

Taking the architecture diagram of the DAS system shown in FIG. 1 as an example, 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. Among them, the main role of 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. 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 . In addition, 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. In other feasible implementation manners, 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. Among them, according to the actual situation, 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.

Specifically, the downlink signal received by the DAS system is taken as an example. In one implementation manner, after the DRH103 receives the target processing signal, 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.

In an implementation manner, after receiving the first frequency conversion signal, 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.

In an implementation manner, after receiving the first frequency conversion signal, 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.

In an implementation manner, after the DRH 103 receives the target processing signal, it 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. After receiving the target processing signal, 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.

Therefore, on the one hand, for the target processing signal (such as a high-frequency signal) received by the DRH103, through frequency conversion processing, 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. In the second aspect, for the signals received by the antenna head 105 (such as the first frequency conversion signal, the target transmission Signal), through frequency conversion processing, 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. Send to the user terminal; in the third aspect, 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.

In order to better understand a signal processing method disclosed in the embodiment of the present invention, the following first describes a communication system applicable to the embodiment of the present invention.

Please refer to FIG. 2, which is a schematic diagram of an architecture of a DAS system disclosed in an embodiment of the present invention. As shown in FIG. 2, the DAS system 20 includes: a remote antenna system remote unit DRH201, a feeder cable 202, and an antenna head end 203. Among them, 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. In an implementation manner, the antenna in the terminal device may receive a radio frequency signal transmitted by the antenna head end 203.

It should be noted that 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.

It can be understood that the communication system described in the embodiments of the present invention is to more clearly illustrate the technical solutions of the embodiments of the present invention, and does not constitute a limitation on the technical solutions provided by the embodiments of the present invention. With the evolution of the system architecture and the emergence of new service scenarios, the technical solutions provided by the embodiments of the present invention are equally applicable to similar technical problems.

Based on the schematic diagram of the DAS system shown in FIG. 2, please refer to FIG. 3. 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.

In one implementation, 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. Specifically, after receiving the millimeter wave signal transmitted by the base station, the DRH may determine the millimeter wave signal as a target processing signal.

In an implementation manner, when a DCU is included in the DAS system (not shown in FIG. 2), 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. In this way, 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. When a feeder cable transmits electromagnetic waves, there is inherently a certain amount of energy loss. In an implementation manner, 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.

In one implementation, the energy loss generated is related to the frequency of the electromagnetic wave. In an implementation manner, 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. Therefore, 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. In addition, it is possible to use the original feeder cable to transmit the first frequency conversion signal without redeploying the feeder cable, which can benefit the old feeder cable and reduce costs.

For example, in traditional DAS systems, 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. By implementing the embodiment of the present invention, after receiving a high-frequency signal, 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.

In an implementation manner, when the target processing signal is a millimeter wave signal, 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. For example, if the feeder cable in the current DAS system is used to transmit 2G, 3G, and 4G signals, as the frequency of the 5G signal increases to the millimeter wave level, 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.

In an implementation manner, when receiving a processing signal, the DRH 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.

In an implementation manner, the target processing signal may be a user signal or an antenna control signal. Accordingly, the first frequency conversion signal obtained according to the target processing signal may also be a user signal or an antenna control signal. In an implementation manner, when the first frequency conversion signal is a user signal, the antenna head end may send the first frequency conversion signal to the user terminal. In an implementation manner, when the first frequency conversion signal is an antenna control signal, the antenna head end may not transmit the first frequency conversion signal and adjust the antenna accordingly according to the first frequency conversion signal.

In an implementation manner, after the antenna head end receives the first frequency conversion signal, the first frequency conversion signal may be subjected to frequency conversion processing. Taking a schematic flow chart of another signal processing method shown in FIG. 4 as an example, 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. For example, 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). If the frequency of the first frequency conversion signal received by the antenna head is 600MHz If the first frequency conversion signal is not subjected to frequency conversion processing, the signal transmitted from the antenna head end (that is, the first frequency conversion signal) cannot be transmitted through the operator's network. By implementing the embodiment of the present invention, 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.

In one implementation, the second frequency range may include one or more frequency bands. In the case of the newly added frequency band supported by the operator (that is, the second frequency range changes), 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. For example, the second frequency range originally supported by the operator includes a frequency band: (610MHz, 620MHz). Now 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.

In an implementation manner, 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. Correspondingly, after receiving the first frequency conversion signal from the DRH at the antenna head end, 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.

In an implementation manner, 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.

Please refer to FIG. 5. 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. Among them, 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.

In an implementation manner, after the antenna head end obtains the target transmission signal, 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.

In the embodiment of the present invention, 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. When the active frequency conversion method is used, 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. When the passive frequency conversion method is adopted, 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.

Please refer to FIG. 6, which 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. It should be noted that 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. For example, when the DRH and the antenna head end work in a frequency division duplex mode, the third frequency range is different from the first frequency range. For another example, when the DRH and the antenna head end work in a time division duplex manner, 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.

In an implementation manner, 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. Specifically, 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.

In an implementation manner, 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. In this way, 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.

In an implementation manner, after receiving the first frequency conversion signal, the DRH may perform frequency conversion processing on the first frequency conversion signal. Taking a schematic flow chart of another signal processing method shown in FIG. 7 as an example, 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. For example, when 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, if 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. Therefore, in the embodiment of the present invention, by performing frequency conversion processing on the first frequency conversion signal at the DRH, 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. Instead of rebuilding new base stations, it is beneficial to the old base stations.

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.

Please refer to FIG. 8. 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. Among them, 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.

Specifically, after the antenna head end obtains the target processing signal, it can directly send the target processing signal to the DRH. In an implementation manner, after the antenna head end receives 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 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.

It can be seen that, by implementing the embodiments of the present invention, on the one hand, in the downlink direction, for the target processed signal obtained by DRH, through frequency conversion processing, a first frequency conversion signal with a frequency that matches the original feeder cable can be obtained, and thus a lower The frequency loss transmits the first frequency conversion signal on the original 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. In the second aspect, in the downlink direction, 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. In summary, by implementing the embodiments of the present invention, 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.

It should be noted that 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. If the antenna head end also receives the uplink processing signal from the user terminal at this time, 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).

Please refer to FIG. 9, which 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. In an implementation manner, the first target processing signal and the second target processing signal may be determined according to signals transmitted by different base stations. In the embodiment of the present invention, 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.

In an implementation manner, if the DRH receives a processing signal, 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. In an implementation manner, 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. For the third signal, the DRH may directly send it to the antenna head-end without performing frequency conversion processing. In this way, it is possible to perform frequency conversion processing only on a processing signal (i.e., a target processing signal) that needs to be converted, instead of performing frequency conversion processing on a processing signal that does not require frequency conversion (i.e., a processing signal having a frequency in a first frequency range) It is beneficial to improve the processing efficiency of DAS system and avoid unnecessary overhead. In addition, transmitting the frequency-converted signal and the non-frequency-converted signal (that is, the processed signal with the frequency in the first frequency range) on the feeder cable at the same time is beneficial to increasing the capacity of the DAS system.

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. Compared to transmitting the first target processing signal and the second target processing signal on the feeder with the same frequency, DRH converts the first target processing signal and the second target processing signal into two first frequency-converted signals with different frequencies. And transmission on the feeder cable can effectively reduce the interference generated during transmission on the feeder cable, which is conducive to improving communication quality. In addition, compared with the method of transmitting one first frequency conversion signal in the feeder cable, 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.

In an implementation manner, the frequencies of the two first frequency conversion signals may belong to two different frequency bands in the first frequency range. For example, if the DRH receives the first target processing signal and the second target processing signal, 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. By converting the first target processing signal and the second target processing signal into two first frequency-converted signals whose frequencies belong to different frequency bands, the interference generated when the two first frequency-converted signals are transmitted on the feeder cable at the same time can be further reduced.

It should be noted that 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. It should also be noted that 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. In other feasible implementations, 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.

In an implementation manner, if the DRH performs frequency conversion processing on the first target processing signal and the second target processing signal respectively to obtain a first frequency conversion signal A and a first frequency conversion signal B, the DRH may convert the first frequency conversion signal through a feeder cable. A is transmitted to the first antenna head end, and 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. Similarly, 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. Specifically, 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.

In one implementation, 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. After receiving the two first frequency-converted signals, 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. . Similarly, 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.

In an implementation manner, 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. By converting the first frequency-converted signal into target frequency-converted signals with different frequencies in each antenna head end, interference generated between the head ends of the antennas can be effectively reduced. For example, in high-density scenarios with high traffic requirements (such as stadiums, basketball courts, or concerts), 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 According to user requirements, if 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.

In an implementation manner, when there is no overlap between the coverage areas of the first antenna head end and the second antenna head end, the frequencies of the first target frequency conversion signal and the second target frequency conversion signal may be the same or different, and the present invention is implemented Examples do not limit this. 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. 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. For example, when the frequency of the target variable frequency signal obtained by the antenna head is 600M, and the frequency bands previously supported by the operator are [700M, 720M], [900M, 920M], a third frequency band [2.1G, 2.2G] is now added to the currently supported 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.

It can be seen that by implementing the embodiments of the present invention, 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. In addition, by converting the frequencies of the first target processing signal and the second target processing signal to different frequency bands to obtain two first frequency conversion signals, and transmitting the two first frequency conversion signals simultaneously on the feeder cable, the DAS can be effectively increased. System capacity.

Please refer to FIG. 10. 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). It should be noted that 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. For example, the frequency of the first target processing signal and the second target processing signal are both 2.1G, and 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. .

For example, if 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), DRH The first target processing signal (frequency 2.1G) can be converted into a first frequency conversion signal A with a frequency of 600M, and 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.

It should be noted that 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.

It should also be noted that the execution order of 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.

Specifically, after the first antenna head (or the second antenna head and the third antenna head) receives the first frequency conversion signal A, the first frequency conversion signal B, and the third target processing 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.

In an implementation manner, the first antenna head end (or the second antenna head end and the third 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. Among them, 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.

For example, when the passband of the band-pass filter of the first antenna head end is 550M to 650M, 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. For another example, when the passband of the band-pass filter of the second antenna head end is 650M to 750M, 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. For another example, when the passband of the band-pass filter of the third antenna head end is 750M to 850M, 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.

It should be noted that 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.

It should also be noted that the execution order of steps S1006, S1007, and S1008 is 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.

Specifically, after obtaining the first target variable frequency signal A at the head end of the first antenna, the frequency of the first target variable frequency signal A and the frequency range supported by the first operator may be obtained. Within the frequency range supported by an operator, 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.

For example, if the frequency range supported by the first operator is [2.0G, 2.2G], that is, the frequency (600M) of the first target frequency conversion signal A is not 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).

In an implementation manner, if the frequency of the first target converted signal A is within a frequency range supported by the first operator, the first antenna head end may directly send the first target converted signal A to the user terminal. Step S1010: The third antenna head performs frequency conversion processing on the third target transmission signal to obtain a second frequency conversion signal B.

Specifically, 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.

For example, if the frequency range supported by the third operator includes three frequency bands, the three frequency bands are the first frequency band [700M, 720M], the second frequency band [900M, 920M], and the third frequency band [2.1G, 2.2G]. ], Then 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. For example, the frequency of the second frequency-converted signal B is 2.1 G.

In an implementation manner, when the DRH is connected to six antenna heads, 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. For example, 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.

In one implementation, if the high frequency band supported by the operator cannot be transmitted on the DAS system, 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. For example, when the frequency range supported by the operator includes three frequency bands, 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. When the frequency of the target processing signal sent to DRH is 28G, 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. For transmission, after receiving the first frequency conversion signal at the antenna head end, 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.

It should be noted that the execution order of steps S1009 and S1010 is 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.

For example, if the frequency range supported by the second operator is [600M, 800M], that is, the frequency (700M) of the first target frequency conversion signal B is within the frequency range supported by the second operator, 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.

It should be noted that the foregoing first operator, second operator, and third operator may be the same operator or different operators. When the first operator, the second operator, and the third operator are 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.

It should be noted that 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. In other feasible implementation manners, 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.

It should also be noted that the execution order of steps S1011, S1012, and S1013 is in no particular order. For example, step S1011 may be performed first, then step S1012, and step S1013 may be performed last. Alternatively, steps S1011, S1012, and S1013 may be performed simultaneously. It should be noted that the above are just examples, not exhaustive.

It can be seen that, by implementing the embodiments of the present invention, when signals from different base stations are received, it can be judged whether to perform frequency conversion processing according to the actual situation, as long as the frequencies of multiple signals transmitted on the feeder cable are at the same time. Within the frequency range supported by the feeder cable, and only if they belong to different frequency bands, in this way, signals of various frequencies can be transmitted in the DAS system, and the capacity of the DAS system can be effectively increased. After the antenna head receives multiple signals transmitted on the feeder cable, you can also determine whether to perform frequency conversion processing according to the actual situation, as long as the frequency of the signal obtained after processing is within the frequency range supported by the corresponding operator That's it, in order to transmit the signal on the operator's network.

Please refer to FIG. 11. 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.

In an implementation manner, the above steps may be performed by DRH. For 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. In an implementation manner, 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.

In an implementation manner, 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. In an implementation manner, the dedicated frequency conversion device may be located between the DRH and the feeder cable shown in FIG. 2, that is, after the DRH receives the target processing signal from the base station, it 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. It should be noted that the embodiment of the present invention does not limit the position of the dedicated frequency conversion equipment.

Please refer to FIG. 12. 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.

In one implementation, the target processing signal may include a first target processing signal and a second target processing signal. Correspondingly, 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.

In an implementation manner, the frequency of the target processing signal may not be within the first frequency range.

In one implementation, the target processing signal may be a millimeter wave signal.

In an implementation manner, 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.

It should be noted that, for the content not mentioned in the embodiment corresponding to FIG. 12 and the specific implementation manner of each module execution step, reference may be made to the embodiments shown in FIG. 3 to FIG. 11 and the foregoing content, which will not be repeated here.

Please refer to FIG. 13. 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.

In one implementation manner, 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.

In one implementation, the second frequency conversion signal may be a millimeter wave signal.

It should be noted that, for the content not mentioned in the embodiment corresponding to FIG. 13 and the specific implementation manner of the execution steps of each module, refer to the embodiments shown in FIG. 3 to FIG.

In an implementation manner, related functions implemented by each module in FIG. 12 may be implemented by combining a processor and a communication interface. Referring to FIG. 14, 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.

The processor 1401 may call the program code stored in the memory 1402 to perform the following operations:

Determine the target processing signal;

Frequency conversion processing the target processing signal to obtain a first frequency conversion signal;

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.

Further, 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. In an implementation manner, the signal processing device described in the embodiment corresponding to FIG. 14 may be a DRH.

In an implementation manner, related functions implemented by each module in FIG. 13 may be implemented by combining a processor and a communication interface. Referring to FIG. 15, 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 antenna head end 1501, processing 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.

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:

Determine the target transmission signal;

Performing frequency conversion processing on the target transmission signal to obtain a second frequency conversion signal whose frequency is within a second frequency range supported by the operator;

A second variable frequency signal is transmitted.

Further, 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. 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. 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.

In the embodiment of the present invention, a chip is also provided, 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.

Those of ordinary skill in the art may realize that the units and algorithm steps of each example described in combination with the embodiments disclosed in this application can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. A professional technician can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions according to the embodiments of the present invention are wholly or partially generated. 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)).

The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present invention. It should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

A signal processing method, which is characterized in that it is applied to a remote unit DRH of a distributed antenna system, and the method includes:

Determine the target processing signal;

Performing 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 method according to claim 1, wherein the target processing signal comprises a first target processing signal and a second target processing signal;

Performing the frequency conversion processing on the target processing signal to obtain a first frequency conversion signal includes:

Performing frequency conversion processing on the first target processing signal and the second target processing signal to obtain two first frequency conversion signals;

Wherein, the frequencies of the two first frequency conversion signals are within the first frequency range;

The frequencies of the two first frequency-converted signals are different.
The method according to claim 1 or 2, wherein the target processing signal is a millimeter wave signal.
A signal processing method, which is characterized in that it is applied to an antenna head end of a distributed antenna system, and the method includes:

Determine the target transmission signal;

Performing a frequency conversion process 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;

And transmitting the second frequency-converted signal.
The method according to claim 4, wherein the determining a target transmission signal comprises:

Receive transmission signals from DRH;

Filtering the transmission signal to obtain the target transmission signal.
The method according to claim 5, wherein the transmission signal is a first frequency conversion signal processed by the frequency conversion of the DRH.
The method according to any one of claims 4 to 6, wherein the second frequency conversion signal is a millimeter wave signal.
A signal processing device, comprising:

A determining module for determining a target processing signal;

A processing module, 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.
A signal processing device, comprising:

A determining module for determining a target transmission signal;

A processing module, 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;

A transmitting module, configured to transmit the second frequency conversion signal.
A distributed antenna system, comprising the signal processing device according to claim 8 and the signal processing device according to claim 9.