CN110661562A - Millimeter wave signal transmission system and transmission device - Google Patents

Abstract

The present application provides a transmission system and a transmission device for millimeter wave signals, which belong to the technical field of communication. The method includes: in the downlink, a transmission system includes a first device and a second device, the first device includes a distributed antenna system DAS, the DAS is used to transmit a first intermediate frequency signal, the second device It is used to perform up-conversion processing on the first intermediate frequency signal transmitted through the DAS to obtain a first millimeter-wave signal, and the second device is also used to transmit the first millimeter-wave signal, so that the second device can cover the range The user equipment UE can receive mmWave signals. Using the present application, a transmission system of a millimeter wave signal is provided.

Description

Millimeter wave signal transmission system and transmission device

technical field

The present application relates to the field of communication technologies, and in particular, to a transmission system and a transmission device for millimeter wave signals.

Background technique

With the development of communication technology, in order to meet the network requirements of a large number of new service scenarios and the ultra-high speed requirements of enhanced mobile broadband (eMBB) user equipment, the fifth-generation of wireless mobile telecommunications Technology, 5G) available frequency bands, in addition to Sub6G (3.4GHz ~ 3.6GHz), it also includes some frequency points in the millimeter wave frequency band (30GHz ~ 300GHz), such as 28GHz, 39GHz, 60GHz and 73GHz.

The frequency of the millimeter wave band is relatively high. Compared with the low-frequency wireless transmission characteristics, the diffraction and reflection capabilities are relatively weak, and the penetration ability is relatively weak, resulting in weak signal strength of the signal received by the signal receiving end. Therefore, it is urgent to provide a A scheme based on transmitting millimeter wave signals.

SUMMARY OF THE INVENTION

In order to solve the problems in the related art, embodiments of the present invention provide a transmission system and a transmission device for a millimeter wave signal. The technical solution is as follows:

In a first aspect, a transmission system for a millimeter wave signal is provided, and the transmission system includes a first device and a second device:

The first device includes a distributed antenna system DAS, and the DAS is used to transmit a first intermediate frequency signal; the second device is configured to perform up-conversion processing on the first intermediate frequency signal transmitted through the DAS, to obtain a first millimeter-wave signal; the second device is further configured to transmit the first millimeter-wave signal.

In the solution shown in the embodiment of the present invention, the transmission system in which the first intermediate frequency signal is a millimeter wave signal includes a first device and a second device, the first device includes a distributed antenna system (Distributed antenna system, DAS), and the second device may be Frequency conversion equipment or frequency conversion head-end, which is used to perform frequency conversion processing on signals (such as down-converting millimeter wave signals to intermediate frequency signals, or up-converting intermediate frequency signals to millimeter wave signals). When there is data to be transmitted by the UE, the data can be modulated On the first intermediate frequency signal, the DAS in the first device sends the first intermediate frequency signal modulated with data to the second device, and the second device can perform up-conversion processing on the received first intermediate frequency signal to obtain the first millimeter wave The first millimeter wave signal is transmitted. Since the first millimeter wave signal is modulated with data, the UE within the coverage of the second device can receive its own data from the first millimeter wave.

In a possible implementation manner, the first device further includes:

A repeater, where the repeater is configured to perform down-conversion processing on the second millimeter-wave signal to obtain the first intermediate frequency signal.

In the solution shown in the embodiment of the present invention, the first device may further include a repeater, and the repeater may down-convert the second millimeter-wave signal to obtain a first intermediate frequency signal, and the frequency of the second millimeter-wave signal may be the same as the frequency of the second millimeter wave signal. A millimeter wave signal has the same frequency. In this way, even if the signal received by the first device is a millimeter wave signal, it can be down-converted to an intermediate frequency signal by means of down-conversion processing, and then transmitted through DAS.

In a possible implementation manner, the repeater is further configured to: receive the second millimeter wave signal.

In the solution shown in the embodiment of the present invention, the repeater can also receive the second millimeter-wave signal, so that the millimeter-wave signal is used before the data is transmitted to the DAS, the intermediate frequency signal is transmitted in the DAS, and the second device The millimeter wave signal is also transmitted between the UE and the UE, so the data is also transmitted based on the millimeter wave signal.

In a possible implementation manner, the transmission system further includes: a third device, where the third device is configured to generate the second millimeter wave signal.

In the solution shown in the embodiment of the present invention, the transmission system may further include a third device, the third device may be used to generate a second millimeter wave signal, and the third device may be any one of an indoor base station, an outdoor base station, an RRU, and a BBU .

In a possible implementation manner, the generating the second millimeter-wave signal includes: performing frequency multiplication processing on a preset baseband signal; and combining the frequency-multiplied signal with the preset first high-frequency signal , performing frequency mixing processing to obtain the second millimeter-wave signal, wherein the frequency of the first high-frequency signal is greater than the frequency of the second millimeter-wave signal.

In the solution shown in the embodiment of the present invention, a baseband signal and a first high-frequency signal are preset in the third device, and the frequency of the first high-frequency signal is greater than the frequency of the second millimeter-wave signal. The third device may perform frequency multiplication processing on the baseband signal to obtain a frequency multiplied signal, and then perform frequency mixing processing on the frequency multiplied signal and a preset first high frequency signal to obtain a second millimeter wave signal.

In a possible implementation manner, performing down-conversion processing on the second millimeter-wave signal to obtain the first intermediate frequency signal includes:

The second millimeter wave signal is mixed with a preset intermediate frequency signal to obtain the first intermediate frequency signal, wherein the frequency of the preset intermediate frequency signal is lower than the frequency of the first intermediate frequency signal.

In the solution shown in the embodiment of the present invention, the preset intermediate frequency signal can be preset and stored in the repeater, the frequency of the preset intermediate frequency signal is lower than the frequency of the first intermediate frequency signal, the repeater can The wave signal is mixed with the preset intermediate frequency signal, and the obtained signal is the first intermediate frequency signal.

In a possible implementation manner, performing up-conversion processing on the first intermediate frequency signal transmitted through the DAS to obtain a first millimeter-wave signal includes:

Mixing the first intermediate frequency signal transmitted by the DAS and the preset second high frequency signal to obtain a first millimeter wave signal, wherein the frequency of the second high frequency signal is greater than the frequency of the first millimeter wave signal.

In the solution shown in the embodiment of the present invention, the second high-frequency signal is pre-stored in the second device, and the second device can perform mixing processing on the first intermediate frequency signal and the preset second high-frequency signal to obtain the first millimeter wave signal. In this way, the second device can transmit the first millimeter wave signal.

In a possible implementation manner, the first device is an indoor transmission network.

In the solution shown in the embodiment of the present invention, the first device may be an indoor transmission network, and the indoor transmission network may be a device for receiving millimeter-wave signals, down-converting the millimeter-wave signals into intermediate frequency signals that can be transmitted by DAS, or for generating Millimeter wave signal, a device that down-converts the millimeter wave signal into an intermediate frequency signal that can be transmitted by DAS. It may be a device that integrates the functions of both a repeater and a DAS. The repeater in the first device can be deployed indoors or outdoors.

In a possible implementation manner, the second device is a frequency conversion device or a frequency conversion head end.

In the solution shown in the embodiment of the present invention, the second device may be a frequency conversion device or a frequency conversion head end, which is installed indoors, and may also be called a millimeter wave frequency conversion head end, which can receive intermediate frequency signals transmitted from DAS, and can also receive signals from UE. millimeter wave signal.

In a possible implementation manner, the third device is one or more of an indoor base station, an outdoor base station, a remote radio unit RRU, and a baseband processing unit BBU.

In the solution shown in the embodiment of the present invention, the third device may be installed indoors or outdoors, and indoors are an indoor base station, an RRU (Radio Remote Unit, remote radio unit), and a BBU (Building Base band Unit, baseband processing unit) ) one of them. When indoors, it is equivalent to that the third device can receive data sent from the outdoor base station or the core network side, and the third device can generate a millimeter wave signal for indoor data transmission. When outdoors, it is equivalent to that the third device can receive data sent from the core network side, and the third device can generate a millimeter-wave signal, modulate the data on the millimeter-wave signal, and send it to the first device.

In a second aspect, a millimeter wave signal transmission device is provided, the transmission device includes a first processing circuit and a second processing circuit, wherein: the first processing circuit is used to receive a target millimeter wave signal; the second The processing circuit is configured to perform down-conversion processing on the target millimeter wave signal to obtain a target intermediate frequency signal; the second processing circuit is further configured to transmit the target intermediate frequency signal.

In the solution shown in the embodiment of the present invention, when the outdoor base station has data (which may be called target data) sent to the UE, the outdoor base station can generate a baseband signal, then perform frequency multiplication processing on the baseband signal, and then perform frequency multiplication processing on the up-converted signal. The signal and the high-frequency signal are mixed to obtain a millimeter wave signal. The target data is modulated on the millimeter wave signal, and then the millimeter wave signal modulated with the target data is sent to the repeater by means of optical cable or wireless air interface signal. The repeater can receive the millimeter wave signal sent by the outdoor base station. The processing of this step may be performed by the first processing circuit in the transmission device. The repeater can mix the millimeter wave signal modulated with the target data with the preset intermediate frequency signal, that is, perform down-conversion processing to obtain the target intermediate frequency signal modulated with the target data, wherein the preset intermediate frequency signal frequency less than the frequency of the target IF signal. Alternatively, the repeater can demodulate the millimeter wave signal modulated with the target data to obtain the millimeter wave signal without data modulation and the target data, and then conduct the millimeter wave signal without data modulation with the preset intermediate frequency signal. Mixing processing, that is, performing down-conversion processing to obtain a target intermediate frequency signal without data modulated. Then, the target data is modulated on the target intermediate frequency signal that is not modulated with the target data to obtain the target intermediate frequency signal that is modulated with the target data. The processing of this step may be performed by a second processing circuit in the transmission device. The repeater can transmit and process the target IF signal modulated with the target data, and the UE in the area covered by the repeater can receive the target IF signal and obtain its own data from it. The processing of this step may be performed by a second processing circuit in the transmission device.

In a possible implementation manner, performing down-conversion processing on the target millimeter wave signal to obtain a target intermediate frequency signal: performing frequency mixing processing on the target millimeter wave signal and a preset intermediate frequency signal to obtain a target intermediate frequency signal, wherein the frequency of the preset intermediate frequency signal is lower than the frequency of the target intermediate frequency signal.

In the solution shown in the embodiment of the present invention, the repeater can obtain the pre-stored preset intermediate frequency signal, and then perform frequency mixing processing on the target millimeter wave signal and the preset intermediate frequency signal to obtain the target intermediate frequency signal.

The beneficial effects brought by the technical solution provided by this application include at least:

In this application, not only a transmission system for millimeter wave signals is provided, but also in indoor scenarios, the original indoor DAS can also be used. The original indoor DAS can only transmit signals up to 2.6G, and transmit millimeter waves indoors. When the signal is transmitted, the frequency reduction method is adopted. After the millimeter wave signal is down-converted to the first intermediate frequency signal, it can be transmitted in the original DAS, and the frequency of the first intermediate frequency signal is relatively lower than that of the millimeter wave signal. Losses are also relatively small. Moreover, in outdoor scenarios, through the frequency reduction processing of the repeater, the intermediate frequency signal is used to transmit data between the repeater and the user equipment, which can reduce the transmission loss.

Description of drawings

1 is a schematic diagram of an indoor scene provided by an embodiment of the present invention;

2 is a schematic diagram of an outdoor scene provided by an embodiment of the present invention;

3 is a schematic structural diagram of a second device provided by an embodiment of the present invention;

4 is a schematic structural diagram of a transmission system for a millimeter wave signal provided by an embodiment of the present invention;

5 is a schematic structural diagram of a transmission system for a millimeter wave signal provided by an embodiment of the present invention;

6 is a schematic diagram of an indoor scene provided by an embodiment of the present invention;

7 is a schematic diagram of an indoor scene provided by an embodiment of the present invention;

8 is a schematic flowchart of a method for transmitting data according to an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of an apparatus for transmitting a millimeter wave signal according to an embodiment of the present invention.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present application clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

In order to facilitate the understanding of the embodiments of the present invention, the following first introduces the system architecture involved in the embodiments of the present invention and the concepts of related terms:

The embodiments of the present invention can be applied to a 5G network. In order to meet the ultra-high-speed requirements of eMMB users, the available spectrum of the 5G network includes not only Sub6G, but also millimeter-wave frequency bands such as 28/39/60/73 GHz, which are related to the wireless propagation characteristics of the low frequency band. Due to the weak diffraction and reflection capabilities, the path loss and penetration loss in the millimeter-wave band are relatively high, so based on this, it is necessary to propose a method for data transmission based on the millimeter-wave band.

There are various application scenarios in the implementation of the present invention, which are described below:

indoor scene. As shown in FIG. 1 , the transmission system for millimeter wave signals includes a first device and a second device, the first device may be an indoor transmission network, and may include DAS, the second device may be deployed indoors, and the second device may be a frequency conversion device Or the frequency conversion head end, which is used to up-convert the intermediate frequency signal to a millimeter-wave signal, or to down-convert the millimeter-wave signal to an intermediate frequency signal. In the downlink, the first device can be connected to the second device through DAS, the DAS in the first device can be used to transmit the intermediate frequency signal to the second device, and the second device can be used to transmit the intermediate frequency signal through the DAS. Up-conversion processing is performed to obtain a millimeter-wave signal, and transmission processing is performed. The UE within the coverage of the second device can receive its own data from the millimeter-wave signal.

outdoor scene. The system architecture of the outdoor scene, as shown in Figure 2, includes an outdoor base station and a transmission device. The transmission device can be a repeater, a repeater, etc. The outdoor base station and transmission device are set outdoors and between the outdoor base station and the UE. . In the downlink, the transmission device is used to down-convert the millimeter wave signal received from the outdoor base station with data modulated into an intermediate frequency signal modulated with data, and transmit the intermediate frequency signal modulated with data in the area covered by itself, and the UE receives it. . In the uplink, the transmission device is used to up-convert the intermediate frequency signal received from the UE with data modulated into a millimeter wave signal modulated with data, and send the millimeter wave signal modulated with data to the outdoor base station to which it belongs. The outdoor base station is used to receive data sent by the core network side.

DAS is a network composed of multiple antennas distributed in a building and dedicated to providing wireless indoor coverage, which can be passive DAS. A passive DAS is a network of coaxial cables, couplers, and power dividers (used to distribute RF signals to individual antennas within a building).

UE: Also called user equipment, terminal equipment. The terminal equipment may also be referred to as access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user equipment. The terminal device may be a station (STAION, ST) in a WLAN, a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a personal digital processor ( Personal Digital Assistant, PDA) devices, handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, and next-generation communication systems.

Outdoor base station: realizes wireless communication coverage and provides services for UE through at least one cell, and can selectively support Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, wideband code Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access , WiMAX) communication system, the future fifth generation (5th Generation, 5G) system or New Radio (New Radio, NR) and so on.

Millimeter wave signal, a signal with a frequency greater than a certain value, such as a signal with a frequency of 28GHz, is a millimeter wave signal.

The intermediate frequency signal is a signal with a lower frequency than the millimeter wave signal. For example, the frequency of the millimeter wave signal is 28GHz, and the frequency of the intermediate frequency signal is 3.5GHz.

FIG. 3 shows a structural block diagram of a second apparatus in an embodiment of the present invention. The second apparatus may at least include a receiver 301 , a processor 302 , a memory 303 , and a transmitter 404 . The receiver 301 may be used for data reception, specifically for UE data reception, the transmitter 404 may be used for data transmission, specifically for UE data transmission, and the memory 303 may be used for storing software Programs and modules, the processor 302 executes various functional applications and data processing by running software programs and modules stored in the memory 303 . The memory 303 mainly includes a storage program area and a storage data area, wherein the storage program area can store an operating system, an application program required for at least one function, and the like; the storage data area can store data created according to the use of the second device, and the like. Additionally, memory 303 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage device. Accordingly, the memory 303 may also include a memory controller to provide access to the memory 303 by the processor 302 , the receiver 301 and the transmitter 404 . The processor 302 is the control center of the second device, uses various interfaces and lines to connect various parts of the entire second device, runs or executes the software programs and/or modules stored in the memory 303, and invokes the software programs and/or modules stored in the memory 303. data, perform various functions of the second device and process data, so as to monitor the second device as a whole.

Optionally, the processor 302 may include one or more processing cores; preferably, the processor 302 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface, and application programs, etc. , the modem processor mainly deals with wireless communication. It can be understood that, the above-mentioned modulation and demodulation processor may not be integrated into the processor 302 .

In the embodiment of the present invention, the application scenario is an indoor scenario in an indoor scenario as an example to describe the solution. As shown in FIG. 1 , the transmission system of the millimeter wave signal may be as follows:

The transmission system includes a first device and a second device, the first device includes a distributed antenna system DAS, the DAS is used to transmit the first intermediate frequency signal; the second device is used to perform up-conversion processing on the first intermediate frequency signal transmitted through the DAS, The first millimeter wave signal is obtained; the second device is further configured to transmit the first millimeter wave signal.

In implementation, when there is data on the core network side (the data may be referred to as first data hereinafter) to be sent to the UE, the device on the core network side can send the first data to the first device through a wireless air interface or an optical cable, and the first data The device may receive the first data sent by the device on the core network side. Alternatively, when the outdoor base station sends data to the UE, the outdoor base station may send the first data to the first device through a wireless air interface or an optical cable, and the first device may receive the first data sent by the outdoor base station. After receiving the first data, the first device may modulate the first data on the first intermediate frequency signal, and transmit the first intermediate frequency signal to the second device through the DAS.

After the second device receives the first intermediate frequency signal, since the signal received by the UE is a millimeter wave signal, the second device performs up-conversion processing on the received first intermediate frequency signal, so that the first intermediate frequency signal is up-converted into a millimeter wave signal.

Optionally, performing frequency mixing processing on the first intermediate frequency signal transmitted by the DAS and the preset second high frequency signal to obtain the first millimeter wave signal.

In implementation, the first intermediate frequency signal modulated with the first data may be demodulated to obtain the first data and the first intermediate frequency signal without the first data modulated, and then the first intermediate frequency signal without the first data modulated with the first data may be demodulated. Up-conversion processing (that is, performing frequency mixing processing on the first intermediate frequency signal and a preset second high frequency signal, the frequency of the second high frequency signal is greater than the frequency of the first millimeter wave signal) to obtain the first millimeter wave signal. Then, the first data is modulated onto the first millimeter-wave signal, so that the first millimeter-wave signal is modulated with the first data. Alternatively, up-conversion processing can be performed directly on the first intermediate frequency signal modulated with the first data (that is, the first intermediate frequency signal modulated with the first data is mixed with a preset second high frequency signal) to obtain the first millimeter wave signal, so that the first millimeter wave signal is also modulated with first data.

After the second device obtains the first millimeter wave signal modulated with the first data, it can perform transmission processing by means of radio frequency, and the UE within the coverage of the second device can receive the data sent to itself.

In this way, when the millimeter wave signal is used, since the intermediate frequency signal is transmitted in the DAS, the DAS in the prior art can also be used.

Optionally, the first device may be an indoor transmission network, and the indoor transmission network may be a device for receiving millimeter-wave signals, down-converting the millimeter-wave signals into intermediate frequency signals that can be transmitted by DAS, or for generating millimeter-wave signals, A device for down-converting millimeter wave signals into intermediate frequency signals that DAS can transmit. It may be a device that integrates the functions of both a repeater and a DAS. The repeater in the first device can be deployed indoors or outdoors.

Optionally, the second device may be a frequency conversion device or a frequency conversion head end, which is installed indoors, and may also be called a millimeter wave frequency conversion head end, which can receive intermediate frequency signals transmitted from DAS, and can also receive millimeter wave signals from UE, It is a transit device between UE and DAS.

In the embodiment of the present invention, the source of the first intermediate frequency signal is also provided, and there are the following two ways:

Manner 1: The first device further includes a repeater, and the repeater is further configured to receive the second millimeter-wave signal, and to perform down-conversion processing on the second millimeter-wave signal to obtain the first intermediate frequency signal.

In implementation, the first device further includes a repeater, as shown in FIG. 4 , the repeater can be deployed indoors, as shown in FIG. 5 , or can be deployed outdoors, when deployed outdoors, it is equivalent to the repeater The area where the DAS belonging to the first device is located can be covered. The repeater can be used to receive the second millimeter-wave signal sent by the outdoor base station through wireless or optical cable (the frequency of the second millimeter-wave signal can be the same as the frequency of the first millimeter-wave signal). The repeater may down-convert the second millimeter wave signal to obtain the first intermediate frequency signal.

Optionally, the process of down-conversion processing may be as follows:

The second millimeter wave signal and the preset intermediate frequency signal are mixed to obtain a first intermediate frequency signal, wherein the frequency of the preset intermediate frequency signal is lower than the frequency of the first intermediate frequency signal.

In implementation, the preset intermediate frequency signal may be preset and stored in the repeater, the frequency of the preset intermediate frequency signal is lower than the frequency of the first intermediate frequency signal, and the repeater may combine the second millimeter wave signal with the preset The intermediate frequency signal is mixed, and the obtained signal is the first intermediate frequency signal.

Mode 2: The transmission system further includes: a third device, where the third device is used to generate a second millimeter-wave signal repeater, and the repeater is used to down-convert the second millimeter-wave signal to obtain a first intermediate frequency signal.

In implementation, the transmission system may further include a third device, as shown in FIG. 6 , the third device may be one of an indoor base station, an outdoor base station, an RRU and a BBU, and may be used to generate a millimeter wave signal. The third device is deployed indoors and is connected to the repeater in the first device by optical fiber or wireless. As shown in FIG. 7 , the third device may be an outdoor base station, which may be used to generate a millimeter wave signal. The third device is deployed outdoors, and is connected to the repeater in the first device through optical fiber or wireless. At this time, the repeater should also be deployed indoors.

When the third device receives data to be sent to the UE, it can generate a second millimeter-wave signal, and then modulate the data on the second millimeter-wave signal, and send it to the repeater in the first device, and the repeater receives the second millimeter wave signal. After the second millimeter wave signal, down-conversion processing can be performed to obtain a first intermediate frequency signal.

Optionally, the third device may be installed indoors or outdoors, and indoors is one of an indoor base station, an RRU, and a BBU. When indoors, it is equivalent to that the third device can receive data sent from the outdoor base station or the core network side, and the third device can generate a millimeter wave signal for indoor data transmission. When outdoors, it is equivalent to that the third device can receive data sent from the core network side, and the third device can generate a millimeter-wave signal, modulate the data on the millimeter-wave signal, and send it to the first device.

Optionally, the process of generating the millimeter wave signal may be as follows:

Perform frequency multiplication processing on the preset baseband signal; perform frequency mixing processing on the frequency multiplied signal and the preset first high-frequency signal to obtain a second millimeter wave signal, wherein the frequency of the first high-frequency signal is greater than the frequency of the second mmWave signal.

In an implementation, the baseband signal and the first high-frequency signal are preset in the third device, and the frequency of the first high-frequency signal is greater than the frequency of the second millimeter-wave signal. The third device may perform frequency multiplication processing on the baseband signal to obtain a frequency multiplied signal, and then perform frequency mixing processing on the frequency multiplied signal and a preset first high frequency signal to obtain a second millimeter wave signal.

It should be noted that the above only provides a method for generating a millimeter wave signal, and any method for generating a millimeter wave signal can be applied to the embodiments of the present invention.

Optionally, the process of down-conversion processing may be as follows:

The second millimeter wave signal and the preset intermediate frequency signal are mixed to obtain a first intermediate frequency signal, wherein the frequency of the preset intermediate frequency signal is lower than the frequency of the first intermediate frequency signal.

In implementation, the preset intermediate frequency signal is preset and stored in the repeater, the frequency of the preset intermediate frequency signal is lower than the frequency of the first intermediate frequency signal, and the repeater can compare the second millimeter wave signal with the preset intermediate frequency signal. The intermediate frequency signal is subjected to frequency mixing processing, and the obtained signal is the first intermediate frequency signal.

It should be noted that, in the above two methods, in order to make the quality of the millimeter-wave signal received by the UE better, the first intermediate frequency signal can also be amplified, that is to say, the subsequent signal transmitted in the DAS is also amplified. In this way, the quality of the millimeter wave signal received by the second device is also relatively good.

In addition, in the implementation of the present invention, the transmission process of the millimeter wave signal in the uplink is also given, and the corresponding processing can be as follows:

Mode 1: The second device receives the millimeter-wave signal, and the second device performs down-conversion processing on the received millimeter-wave signal to obtain a second intermediate frequency signal. The DAS is used to transmit the second intermediate frequency signal, and the repeater in the first device receives the signal. To the second intermediate frequency signal, perform up-conversion processing on the second intermediate frequency signal to obtain a third millimeter wave signal, and send the third millimeter wave signal to the outdoor base station, indoor base station or core network side, so that the data of the UE can be sent to the outside. send.

Mode 2: The second device receives the millimeter-wave signal, and the second device performs down-conversion processing on the received millimeter-wave signal to obtain a second intermediate frequency signal. The DAS is used to transmit the second intermediate frequency signal, and the repeater in the first device receives the signal. To the second intermediate frequency signal, perform up-conversion processing on the second intermediate frequency signal to obtain a third millimeter wave signal, and send the third millimeter wave signal to the third device, and the third device sends the data modulated on the third millimeter wave signal to the outdoor. The base station or core network side sends, so that the data of the UE can be sent out.

It should be noted that, in these two methods, although it is not shown that the second intermediate frequency signal and the third millimeter wave signal are modulated with data, they are actually modulated with data sent by the UE to the outside.

In addition, in the embodiment of the present invention, a first device is also provided to directly generate the first intermediate frequency signal, and transmit the first intermediate frequency signal through DAS, and the corresponding processing may be as follows:

When the first device receives the data sent to the UE, it can directly generate a first intermediate frequency signal, modulate the data onto the first intermediate frequency signal, and transmit the data to the second device through DAS. Repeat.

In the embodiment of the present invention, not only a millimeter-wave signal transmission system is provided, but also the original indoor DAS can be used. The original indoor DAS can only transmit signals up to 2.6G. When transmitting millimeter-wave signals indoors, The method of reducing the frequency of transmission is adopted. After the millimeter wave signal is down-converted to the first intermediate frequency signal, it can be transmitted in the original DAS, and the frequency of the first intermediate frequency signal is relatively lower than that of the millimeter wave signal, and the transmission loss is also relatively high. Small.

In another embodiment of the present invention, an outdoor scene is also provided. The execution subject is a transmission device set between the outdoor base station and the UE. The transmission device can be any device that can be set between the base station and the UE, and can receive millimeter wave signals and perform frequency conversion. A device that transmits the signal after processing, for example, the transmission device can be a repeater or a repeater, as shown in Figure 8, and the corresponding steps can be as follows:

Step 801, receiving a target millimeter wave signal.

In implementation, when the outdoor base station has data sent to the UE (which can be called target data), the outdoor base station can generate a baseband signal, then perform frequency multiplication processing on the baseband signal, and then perform up-conversion processing on the signal and the high-frequency signal. The signal is mixed to obtain a millimeter wave signal. The target data is modulated on the millimeter wave signal, and then the millimeter wave signal modulated with the target data is sent to the repeater by means of optical cable or wireless air interface signal.

The repeater can receive the millimeter wave signal sent by the outdoor base station.

The processing of this step may be performed by the first processing circuit in the transmission device.

Step 802: Perform down-conversion processing on the target millimeter wave signal to obtain a target intermediate frequency signal.

In the implementation, the repeater may mix the millimeter wave signal modulated with the target data with the preset intermediate frequency signal, that is, perform down-conversion processing, to obtain the target intermediate frequency signal modulated with the target data, wherein the preset intermediate frequency signal is obtained. The frequency of the IF signal is lower than the frequency of the target IF signal.

Alternatively, the repeater can demodulate the millimeter wave signal modulated with the target data to obtain the millimeter wave signal without data modulation and the target data, and then conduct the millimeter wave signal without data modulation with the preset intermediate frequency signal. Mixing processing, that is, performing down-conversion processing to obtain a target intermediate frequency signal without data modulated. Then, the target data is modulated on the target intermediate frequency signal that is not modulated with the target data to obtain the target intermediate frequency signal that is modulated with the target data.

The processing of this step may be performed by a second processing circuit in the transmission device.

Step 803, transmitting the target intermediate frequency signal.

In implementation, the repeater can transmit and process the target intermediate frequency signal modulated with the target data, and the UE in the area covered by the repeater can receive the target intermediate frequency signal and obtain its own data therefrom.

The processing of this step may be performed by a second processing circuit in the transmission device.

Optionally, in order to enable the UE to receive data with high signal quality, the repeater can also amplify the target IF signal, and the corresponding processing can be as follows:

The target intermediate frequency signal is amplified, and the amplified target intermediate frequency signal is transmitted.

In implementation, the repeater can amplify the target intermediate frequency signal to obtain the amplified target intermediate frequency signal, and then transmit the amplified target intermediate frequency signal. The UE in the area covered by the repeater can receive the target IF signal and obtain its own data from it. The processing of this step may be performed by a second processing circuit in the transmission device.

Optionally, in this embodiment of the present invention, a process in which the UE sends data to the outside through a millimeter wave signal is also provided, and the corresponding processing may be as follows:

receiving a fourth intermediate frequency signal sent by the UE; performing up-conversion processing on the received fourth intermediate frequency signal to obtain a fourth millimeter wave signal; and performing transmission processing on the fourth millimeter wave signal.

In implementation, when the UE sends data (which may be referred to as fourth data) to other UEs, or when the UE sends data (which may be referred to as fourth data) to the server, the UE may modulate the fourth data on the fourth intermediate frequency signal , and then transmit the fourth intermediate frequency signal modulated with the fourth data. The processing may be performed by the first processing circuit.

After receiving the fourth intermediate frequency signal modulated with the fourth data sent by the UE, the repeater station that can receive the millimeter wave signal transmitted by the UE can demodulate the fourth intermediate frequency signal with the fourth data and the unmodulated data, and then The fourth intermediate frequency signal that is not modulated with the fourth data is mixed with the high-frequency signal to obtain a millimeter wave signal, and then the fourth data is modulated onto the millimeter wave signal (this processing process can be performed by the second processing circuit), The millimeter wave signal modulated with the fourth data is sent to the outdoor base station by means of an optical cable or a wireless air interface (this processing process may be performed by the second processing circuit).

Alternatively, after receiving the fourth intermediate frequency signal modulated with the fourth data sent by the UE, the repeater can directly perform mixing processing on the fourth intermediate frequency signal modulated with the fourth data and the high-frequency signal to obtain the modulation with the fourth intermediate frequency signal. Four-data millimeter-wave signal (this processing can be performed by the second processing circuit), and the millimeter-wave signal modulated with the fourth data is sent to the outdoor base station by means of an optical cable or a wireless air interface (this processing can be performed by the second processing circuit) implement).

Optionally, in order to make the signal quality of the millimeter-wave signal received by the outdoor base station better, the millimeter-wave signal can be amplified and processed, and the corresponding processing can be as follows:

Amplifying processing is performed on the millimeter wave signal modulated with the fourth data, and transmitting processing is performed on the amplified millimeter wave signal modulated with the fourth data.

In implementation, the repeater may amplify the millimeter-wave signal modulated with the fourth data, and then send the millimeter-wave signal modulated with the fourth data to the outdoor base station through an optical cable or a wireless air interface.

In the embodiment of the present invention, since the repeater down-converts the millimeter wave signal to the intermediate frequency signal, and sends the data to the UE through the intermediate frequency signal, the intermediate frequency signal is used to transmit data between the repeater and the UE, and the intermediate frequency signal is relatively millimeter wave. The signal frequency is relatively low, and the transmission loss is relatively small.

Based on the same technical concept, as shown in FIG. 9 , an embodiment of the present invention further provides a millimeter wave signal transmission device, the transmission device includes a first processing circuit and a second processing circuit, wherein:

The first processing circuit 910 is configured to receive the target millimeter wave signal;

The second processing circuit 920 is configured to perform down-conversion processing on the target millimeter wave signal to obtain a target intermediate frequency signal;

The second processing circuit 930 is also used for transmitting the target intermediate frequency signal.

Optionally, the second processing circuit 920 is used for:

Mixing the target millimeter wave signal and a preset intermediate frequency signal is performed to obtain a target intermediate frequency signal, wherein the frequency of the preset intermediate frequency signal is lower than the frequency of the target intermediate frequency signal.

In the embodiment of the present invention, since the repeater down-converts the millimeter wave signal to the intermediate frequency signal, and sends the data to the UE through the intermediate frequency signal, the intermediate frequency signal is used to transmit data between the repeater and the UE, and the intermediate frequency signal is relatively millimeter wave. The signal frequency is relatively low, and the transmission loss is relatively small.

It should be noted that when the millimeter wave signal transmission device provided in the above embodiments transmits data, only the division of the above functional modules is used as an example for illustration. In practical applications, the above functions may be allocated to different functional modules as required. Completion means dividing the internal structure of the transmission device into different functional modules to complete all or part of the functions described above. In addition, the millimeter wave signal transmission device and the method for transmitting data provided in the above embodiments belong to the same concept, and the specific implementation process thereof is detailed in the method embodiment, which will not be repeated here.

Those of ordinary skill in the art can understand that all or part of the steps of implementing the above embodiments can be completed by hardware, or can be completed by instructing relevant hardware through a program, and the program can be stored in a computer-readable storage medium. The storage medium mentioned may be a read-only memory, a magnetic disk or an optical disk, etc.

The above description is only one embodiment of the present invention, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application. Inside.

Claims (12)

1. A transmission system of a millimeter wave signal, wherein the transmission system comprises a first device and a second device, The first device includes a distributed antenna system DAS, the DAS is used to transmit a first intermediate frequency signal; The second device is configured to perform up-conversion processing on the first intermediate frequency signal transmitted through the DAS to obtain a first millimeter wave signal; The second device is further configured to transmit the first millimeter wave signal. 2. The transmission system according to claim 1, wherein the first device further comprises: A repeater, where the repeater is configured to perform down-conversion processing on the second millimeter-wave signal to obtain the first intermediate frequency signal. 3. The transmission system according to claim 2, wherein the repeater is also used for: The second millimeter wave signal is received. 4. The transmission system according to claim 2, wherein the transmission system further comprises: A third device, the third device is configured to generate the second millimeter wave signal. 5. The transmission system according to claim 4, wherein the generating the second millimeter wave signal comprises: Perform frequency multiplication processing on the preset baseband signal; Mixing the frequency-multiplied signal and the preset first high-frequency signal to obtain the second millimeter-wave signal, wherein the frequency of the first high-frequency signal is greater than that of the second millimeter-wave signal Frequency of. 6. The transmission system according to any one of claims 2 to 5, wherein the performing down-conversion processing on the second millimeter-wave signal to obtain the first intermediate frequency signal comprises: The second millimeter wave signal is mixed with a preset intermediate frequency signal to obtain the first intermediate frequency signal, wherein the frequency of the preset intermediate frequency signal is lower than the frequency of the first intermediate frequency signal. 7. The transmission system according to any one of claims 1 to 5, wherein the performing up-conversion processing on the first intermediate frequency signal transmitted by the DAS to obtain the first millimeter wave signal, comprising: Mixing the first intermediate frequency signal transmitted by the DAS and the preset second high frequency signal to obtain a first millimeter wave signal, wherein the frequency of the second high frequency signal is greater than the frequency of the first millimeter wave signal. 8. The transmission system according to any one of claims 1 to 5, wherein the first device is an indoor transmission network. 9 . The transmission system according to claim 1 , wherein the second device is a frequency conversion device or a frequency conversion head end. 10 . 10. The transmission system according to claim 4, wherein the third device is one or more of an indoor base station, an outdoor base station, a remote radio unit RRU, and a baseband processing unit BBU. 11. A millimeter wave signal transmission device, characterized in that the transmission device comprises a first processing circuit and a second processing circuit, wherein: the first processing circuit is used for receiving the target millimeter wave signal; The second processing circuit is used to down-convert the target millimeter-wave signal to obtain a target intermediate frequency signal; The second processing circuit is also used for transmitting the target intermediate frequency signal. 12. The transmission device according to claim 11, wherein the target millimeter-wave signal is subjected to down-conversion processing to obtain a target intermediate frequency signal: Mixing the target millimeter wave signal and a preset intermediate frequency signal is performed to obtain a target intermediate frequency signal, wherein the frequency of the preset intermediate frequency signal is lower than the frequency of the target intermediate frequency signal.

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