WO2019228112A1

WO2019228112A1 - Method, apparatus and system for transmitting radio frequency signal

Info

Publication number: WO2019228112A1
Application number: PCT/CN2019/084615
Authority: WO
Inventors: 耿阳; 蒲涛; 赵建平; 俞鑫; 杨敬; 解清明
Original assignee: 华为技术有限公司
Priority date: 2018-05-28
Filing date: 2019-04-26
Publication date: 2019-12-05
Also published as: CN110545113A; CN110545113B

Abstract

A method, apparatus and system for transmitting a radio frequency signal. The method comprises: obtaining baseband signal flows required to be transmitted; performing digital weighting on the obtained baseband signal flows required to be transmitted to map the baseband signal flows required to be transmitted into multiple radio frequency channels, and transmitting the baseband signal flows mapped to the radio frequency channels to the radio frequency channels, a phase difference existing for each baseband signal in the baseband signal flows mapped to the radio frequency channels between each two adjacent radio frequency channels; performing power dividing on a transmitting signal in a first radio frequency channel; and transmitting a radio frequency signal. According to the present application, by means of digital weighting and power dividing, signals in N radio frequency channels are transmitted by means of N plus Z columns of antennas (Z is the number of signals obtained by performing power dividing), and the number of columns of antennas for transmitting radio frequency signals is increased without increasing the radio frequency channels. Costs of a device are not increased while providing a solution for transmitting a radio frequency signal having a larger capacity, and the insertion loss of the device is reduced.

Description

Radio frequency signal transmission method, device and system

This application claims priority from a Chinese patent application filed with the Chinese Patent Office on May 28, 2018, with application number 201810523456.4, and the invention name is "A Method, Device and System for Radio Frequency Signal Transmission", the entire contents of which are incorporated herein by reference. In this application.

Technical field

The present application relates to the field of radio frequency technology, and in particular, to a method, a device, and a system for transmitting a radio frequency signal.

Background technique

With people's increasing demand for communication, the base station expands the capacity of the signal transmitting end and signal receiving end of the base station by adding antennas, thereby meeting increasing user demand. For example, from the traditional single-row antenna to the two-row antenna, to the current four-row and eight-row antenna. However, the improvement of the 8T architecture of the 4-row antenna over the single-row 2T is very limited, and it cannot meet the requirements of the operator.

Therefore, the prior art urgently needs a radio frequency signal transmitting device capable of providing a larger capacity, and at the same time, it can reduce the cost of equipment and reduce insertion loss.

Summary of the Invention

According to the above technical problems, the present application provides a method, a device, and a system for transmitting a radio frequency signal. By using the method at a base station, the capacity of the base station is increased, the cost of the device is reduced, and the insertion loss is reduced.

This application is implemented by the following methods:

In one aspect, a specific embodiment of the present application provides a method for transmitting a radio frequency signal, which includes: acquiring a baseband signal stream that needs to be transmitted, the baseband signal stream includes at least one baseband signal; The baseband signal flow to be transmitted is mapped to multiple radio frequency channels and the baseband signal flow mapped to each radio frequency channel is transmitted to each radio frequency channel. Each baseband signal in the baseband signal flow mapped to each radio frequency channel is transmitted in every two adjacent channels. There is a phase difference between the radio frequency channels; power transmission processing is performed on the transmitted signal of the first radio frequency channel, and the first radio frequency channel is one or more radio frequency channels among a plurality of radio frequency channels. The power of the transmitted signal is allocated to at least two columns of antennas respectively; sending radio frequency signals, the radio frequency signals include: each first radio frequency channel power division processed transmission signal, or each first radio frequency channel power division processed transmission signal And a plurality of radio frequency channels other than the first radio frequency channel to transmit signals.

Through digital weighting and power division processing, the signals of N radio frequency channels are transmitted through N plus Z column antennas (Z is the number of signals for power division), so that the antenna for transmitting radio frequency signals is added without increasing the radio frequency channel. The number of columns. At the same time, it can provide a larger-capacity radio frequency signal transmission scheme without increasing the cost of the device and reducing the insertion loss of the device.

In a possible design, digitally weighting the baseband signal stream that needs to be transmitted is to make the baseband signal stream that needs to be transmitted and the baseband signal stream that is transmitted to each RF channel meet:

among them,

A matrix of one row and n columns formed for the baseband signal stream to be transmitted, where the value of n is equal to the number of acquired baseband signals to be transmitted;

A matrix formed for the baseband signal stream transmitted to each radio frequency channel;

Is a digital matrix of n rows and z columns. The value of n in the digital matrix is equal to the number of radio frequency channels. The value of z in the digital matrix is equal to the number of baseband signals to be transmitted. For a radio frequency channel, a column in the digital matrix is used to indicate the phase assigned to a different radio frequency channel from a baseband signal.

In a possible design, the transmission signals of each radio frequency channel and the transmission signals after the power division processing of the first radio frequency channel and the transmission signals of multiple radio frequency channels other than the first radio frequency channel need to satisfy:

among them,

A matrix formed for the transmitted signals of each radio frequency channel,

A matrix formed by the power division processed transmission signal of the first radio frequency channel and the transmission signals of multiple radio frequency channels other than the first radio frequency channel,

It is an analog matrix of y rows and x columns. The value of x in the analog matrix is equal to the sum of the number of RF channels and the number of signals for power division processing. The value of y in the analog matrix is the same as the number of RF channels; the analog matrix The elements in the a-th column and the b-th column in the middle are determined according to the ratio of the power transmitted by the data of the a-channel on the b antennas, where a is greater than or equal to 1 and less than or equal to x, and b is greater than or equal to 1 and less than or equal to y.

In a possible design, before performing power division processing on the transmitted signals of the first radio frequency channel, the method further includes: performing digital-to-analog conversion and frequency modulation on the baseband signal streams transmitted from each radio frequency channel to digitize the baseband signal stream. The signal is converted into an analog high-frequency signal.

In a possible design, each baseband signal in the baseband signal stream mapped to each radio frequency channel has an equal phase difference between every two adjacent radio frequency channels. By making the phase difference of each baseband signal between every two adjacent radio frequency channels equal, a narrow beam with a specific direction and a low sidelobe is obtained.

In a second aspect, a specific embodiment of the present application provides a radio frequency signal transmission system, including a digital weighting module, N radio frequency channels, M columns of antennas, and Z power dividers, where N is a positive integer greater than 0 and M is greater than N, a positive integer less than or equal to 2N, MN is equal to Z; the digital weighting module is used to obtain the baseband signal stream to be transmitted, and the baseband signal stream includes at least one baseband signal; the digital weighting module is also used to obtain the baseband that needs to be transmitted The signal streams are digitally weighted to map the baseband signal stream that needs to be transmitted to N radio frequency channels and the baseband signal stream that is mapped to the N radio frequency channels is transmitted to the N radio frequency channels and mapped to the baseband signal stream of the N radio frequency channels. Each baseband signal has a phase difference between every two adjacent radio frequency channels; the N radio frequency channels are respectively used for digital-to-analog conversion and frequency modulation of the baseband signal stream mapped to the N radio frequency channels to convert the baseband signal Stream digital signals are converted to analog high-frequency signals; Z power dividers are used to perform power division processing on the transmitted signal of the first video channel, and the first RF channel is N One or more radio frequency channels in the radio frequency channel. The power division processing is to distribute the power of the transmitted signal of each first radio frequency channel to at least two columns of antennas respectively; the M columns of antennas are used to transmit radio frequency signals. The video signals include: Each of the first radio frequency channels is subjected to a power division processing transmission signal, or each of the first radio frequency channels is subjected to a power division processing transmission signal and the radio frequency channels of the N radio frequency channels except the first radio frequency channel are transmitted.

among them,

A matrix formed by the baseband signal stream transmitted to each radio frequency channel,

It is a digital matrix with n rows and z columns. The value of n in the digital matrix is equal to the number of RF channels. The value of z in the digital matrix is equal to the number of acquired baseband signals to be transmitted. One row in the digital matrix is used to represent For a radio frequency channel, a column in the digital matrix is used to indicate the phase assigned to a different radio frequency channel from a baseband signal.

In a possible design, the transmission signals of the N radio frequency channels and the transmission signals after the power division processing of the first radio frequency channel and the transmission signals of multiple radio frequency channels other than the first radio frequency channel need to satisfy:

among them,

A matrix formed for the transmitted signals of each radio frequency channel,

It is an analog matrix of y rows and x columns. The value of x in the analog matrix is equal to the sum of the number of RF channels and the number of signals for power division processing. The value of y in the analog matrix is the same as the number of RF channels; the analog matrix The elements in the a-th column and the b-th column of the middle are determined according to the ratio of the power transmitted by the data of the a-channel on the b-antenna, where a is greater than or equal to 1 and less than or equal to x, and b is greater than or equal to 1 and less than or equal to y.

In a possible design, the number of baseband signal streams to be transmitted received by the digital weighting module is 3, the number of N radio frequency channels is 4, the number of M-column antennas is 6, and the number of Z power dividers is 2.

In a possible design, each baseband signal in the baseband signal stream mapped to the N radio frequency channels has the same phase difference between every two adjacent radio frequency channels.

According to a third aspect, a radio frequency signal transmitting apparatus provided by a specific embodiment of the present application includes: an acquiring unit for acquiring a baseband signal stream to be transmitted, the baseband signal stream including at least one baseband signal; and a processing unit for The baseband signal stream to be transmitted is digitally weighted to map the baseband signal stream to be transmitted to multiple radio frequency channels, and the baseband signal stream mapped to each radio frequency channel is transmitted to each radio frequency channel, and is mapped to the baseband signal stream of each radio frequency channel. Each baseband signal has a phase difference between every two adjacent radio frequency channels; the processing unit is further configured to perform power division processing on the transmitted signal of the first radio frequency channel, where the first radio frequency channel is a multiple of the radio frequency channels. One or more radio frequency channels, the power division processing is to distribute the power of the transmitted signal of each first radio frequency channel to at least two columns of antennas respectively; the sending unit is used to send radio frequency signals, and the radio frequency signals include: each first radio frequency channel The transmitted signal after power division processing, or the transmitted signal and power of each first RF channel after power division processing. Transmitting signals of other radio frequency channel of the radio channel other than the first radio channel.

among them,

Is a digital matrix of n rows and z columns. The value of n in the digital matrix is equal to the number of radio frequency channels. The value of z in the digital matrix is equal to the number of acquired baseband signals to be transmitted. One row in the digital matrix is used to represent For a radio frequency channel, a column in the digital matrix is used to indicate the phase assigned to a different radio frequency channel from a baseband signal.

among them,

A matrix formed for the transmitted signals of each radio frequency channel,

A matrix formed by the power division processed transmission signal of the first radio frequency channel and the transmission signals of radio frequency channels other than the first radio frequency channel in the plurality of radio frequency channels,

It is an analog matrix of y rows and x columns. The value of x in the analog matrix is equal to the sum of the number of RF channels and the number of signals for power division processing. The value of y in the analog matrix is the same as the number of RF channels; The elements in the a-th column and the b-th column in the middle are determined according to the ratio of the power transmitted by the data of the a-channel on the b antennas, where a is greater than or equal to 1 and less than or equal to x, and b is greater than or equal to 1 and less than or equal to y.

In a possible design, before the processing unit performs power division processing on the transmission signal of the first radio frequency channel, the processing unit further includes: a processing unit, configured to perform digital-to-analog conversion and frequency modulation on the baseband signal stream transmitted to each radio frequency channel, To convert the digital signal of the baseband signal stream into an analog high-frequency signal.

In a possible design, each baseband signal in the baseband signal stream mapped to each radio frequency channel has an equal phase difference between every two adjacent radio frequency channels.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a base station provided by a specific embodiment of the present application;

2 is a radio frequency signal transmission system of a base station according to a specific embodiment of the present application;

3 is a radio frequency signal transmission method provided by a specific embodiment of the present application;

FIG. 4 is a radio frequency signal transmitting device provided by a specific embodiment of the present application.

Detailed ways

The technical solutions provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

It should be noted that the beam in the specific embodiment of the present application refers to the shape formed on the ground by electromagnetic waves emitted by the antenna array. In some feasible embodiments, the beam formed by the antenna array in this application may be a narrow beam, that is, a beam with a smaller wave width and a larger gain. In other feasible embodiments, the antenna array in the present application may also form a wider beam, which is not limited herein.

FIG. 1 is a base station provided by a specific embodiment of the present application. As shown in FIG. 1, the base station includes a digital processing circuit, a digital-analog hybrid circuit, an analog signal circuit, and an antenna array. Wherein, the above-mentioned digital processing circuit is connected to a digital-analog hybrid circuit and an analog signal circuit, which is only an implementation solution in a specific embodiment of the present application. If the base station includes four antenna groups, the digital processing circuit includes four digital-analog hybrid circuits and four analog signal circuits. Among them, a digital-analog mixed circuit and an analog signal circuit are connected to a group of antennas

Among them, the digital processing circuit is used for receiving various optical signals sent by the backbone network, and sending signals to be sent to the backbone network from the base station to the backbone network. The digital processing circuit is also used to send the received signal sent from the backbone network to the DAC. The received multiple signals are respectively mapped to multiple DACs, and the signals mapped to the multiple DACs have phase differences.

The digital-analog hybrid circuit includes a digital analog converter (Digital Analog Converter, DAC) and an analog digital converter (Analog Digital Converter) (ADC). The DAC is used to convert the received digital signal into an analog signal, and the ADC is used to convert various analog signals received by the antenna into a digital signal.

The analog signal circuit includes a transmitting end and a receiving end. The transmitting end includes a mixer, a local oscillator (OSC), and a power amplifier (PA), and the receiving end includes a low noise amplifier (Low Noise Amplifier, LNA), a local oscillator (OSC), Mixer and filter (Low Pass Filter, LPF).

The transmitting end is used to send the signal converted by the digital-analog converter in the digital-analog hybrid circuit to the antenna array. The mixer at the transmitting end is connected to the output of the DAC. The mixer at the transmitting end converts low-frequency signals into high-frequency signals. The OSC at the transmitting end is separately connected to the mixer at the transmitting end, and is used to provide a reference signal of the high-frequency signal to be converted to the mixer at the transmitting end. The power amplifier is used to connect with the signal output interface of the mixer at the transmitting end, and the PA is used to amplify the high-frequency signal output by the mixer at the transmitting end.

The receiving end is used to process the signal received by the antenna array and send it to the analog-to-digital converter. LNA is used to reduce the noise of the signal received by the antenna and amplify the signal. The local oscillator at the receiving end is connected to the signal output interface of the LNA. The local oscillator at the receiving end is used to convert the high-frequency signal output by the LNA into a low-frequency signal. The OSC at the receiving end is separately connected to the mixer at the receiving end, and is used to provide the reference signal of the low-frequency signal to be converted to the mixer at the receiving end. The LPF is connected to the mixer at the receiving end, and is used to filter the chassis signal output by the mixer at the receiving end.

Of course, the modules and devices included in the base station of FIG. 1 are only examples in the specific embodiments of the present application, and cannot be used to limit the present application.

In a specific embodiment of the present application, each analog signal circuit may further include a power divider, and the power divider is used to connect with the output interface of the PA. The power divider includes at least two signal output interfaces. The power divider is used to send the output signal of the power amplifier to the corresponding at least two columns of antennas according to a predetermined power ratio, and the at least two columns of antennas are an antenna group. The number of power dividers in the base station is less than or equal to the number of antenna groups.

It should be noted that, in the specific embodiment of the present application, the power divider uses only two signal output interfaces as an example for description. In specific embodiments of the present application, a power divider including more signal output interfaces may also be provided according to the needs of the entire system.

In the following, the signal transmitting end of the base station in the specific embodiment of the present application will be specifically described through specific embodiments.

FIG. 2 is a radio frequency signal transmission system of a base station according to a specific embodiment of the present application. As shown in FIG. 2, the radio frequency signal transmission system includes a digital weighting module, multiple radio frequency channels, at least one power divider, and an antenna array formed by multiple columns of antennas. The digital weighting module is equivalent to the digital processing circuit in FIG. 1. The RF channel is equivalent to the DAC, mixer, OSC, and PA of Figure 1.

The digital weighting module is configured to receive the baseband signal stream determined to be transmitted in the base station, and the baseband signal stream to be transmitted may include at least one baseband signal. The digital weighting module includes a plurality of baseband signal streams that need to be transmitted and are respectively mapped to multiple radio frequency channels, and the multiple signals output by the digital weighting module are digital signals. Through signal mapping, each baseband signal to be transmitted is mapped in each channel separately, and a baseband signal mapped in a different radio frequency channel has a certain phase difference between every two adjacent radio frequency channels. In one example, a baseband signal mapped on different radio frequency channels has the same phase difference between every two adjacent radio frequency channels.

The received multiple baseband signals to be transmitted are respectively mapped to multiple radio frequency channels, and the obtained signals to be mapped are multiplied by a matrix. The digital matrix is a matrix that causes each signal to be transmitted to have a certain phase difference between every two adjacent radio frequency channels. In a specific embodiment of the present application, the number of rows of the digital matrix is equal to the number of radio frequency channels, and the number of columns of the digital matrix is equal to the number of baseband signals to be transmitted received by the digital weighting module.

The digital weighting module may further include multiple signal output interfaces, and the signal output interfaces are respectively connected to a radio frequency channel. In a specific embodiment of the present application, the digital weighting module includes a first signal output interface, a second signal output interface, a third signal output interface, and a fourth signal output interface.

The digital weighting module maps each input baseband signal to be sent to each signal output interface, and the baseband signal stream output by each signal output interface includes each signal received by the digital weighting module. Among them, a baseband signal to be transmitted has a phase difference after being mapped to different signal output interfaces. Optionally, the digital weighting module maps a baseband signal to be transmitted to signals of two adjacent signal output interfaces with the same phase difference.

In a specific example, the baseband signal stream received by the digital weighting module includes a first input signal s1, a second input signal s2, and a third input signal s3. The signals output by the first signal output interface include s1, s2, and s3, the signals output by the second signal include s1, s2, and s3, the signals output by the third signal output interface include s1, s2, and s3, and the signals output by the fourth signal output interface The signals include s1, s2, and s3.

If the phase difference of one signal mapped to two adjacent signal output interfaces is the same, the phase difference between the signal s1 output from the first signal output interface and the signal s1 output from the second signal output interface is α, and the second signal output The phase difference between the signal s1 output by the interface and the signal s1 output by the third signal output interface is α, the phase difference between the signal s1 output by the third signal output interface and the signal s1 output by the fourth signal output interface is α, and α is an arbitrary angle Value.

It should be noted that the power of the baseband signal stream that the digital weighting module maps to each signal output interface may be the same or different, which is not limited in this application. The specific method for the digital weighting module to map each baseband signal to be transmitted to each signal output interface can be shown in the corresponding content in FIG. 3.

Each signal output interface of the digital weighting module is connected to a radio frequency channel, and the radio frequency channel is used to receive signals output by the digital weighting module. In one example, the first signal output interface is connected to the first radio frequency channel, the second signal output interface is connected to the second radio frequency channel, the third signal output interface is connected to the third radio frequency channel, and the fourth signal output interface is connected to the fourth radio frequency channel. Channel connection.

In a specific embodiment of the present application, the radio frequency channel is included for digital-to-analog conversion. The digital signal of the baseband signal stream output by the digital weighting module is converted into an analog signal through a radio frequency channel. In a specific embodiment of the present application, the radio frequency channel may also perform other processing on the analog signal after digital-to-analog conversion, and the manner in which the radio frequency channel performs other processing is not limited. For example, the RF channel also converts digital-to-analog converted analog signals into high-frequency signals, and amplifies the converted high-frequency signals. Of course, the radio frequency channel in the specific embodiment of the present application is not limited to the above functions.

The signal output interfaces of at least one of the multiple radio frequency channels are also connected to the power divider respectively. By distributing the signals output by the radio frequency channels connected to the radio frequency channels according to a certain ratio, and respectively distributing the allocated signals to the corresponding Two-row antenna output. In a specific example, the power divider in the specific embodiment of the present application includes one signal input interface and two signal output interfaces. Of course, the power divider in the specific embodiment of the present application may also include multiple signal output interfaces.

In some feasible embodiments, the power divider is a device that divides the power of one input signal into two or more outputs with equal or unequal energy. It can also combine the energy of multiple signals into one output. According to the output, it is usually divided into two points (one input and two outputs), one minute and three (one input and three outputs), and so on.

When the power divider receives the signal sent by the radio frequency channel, it can distribute the received signal to the two columns of antennas according to a predetermined power distribution ratio, so that when the antenna array of each column receives the radio frequency signals, the required beams are formed respectively. It should be noted that an array of antennas can also be directly connected to a radio frequency channel without the need for a power divider.

Input signals are output from different output interfaces through at least two signal output interfaces of the power divider according to a predetermined power distribution ratio. In a specific embodiment of the present application, the ratio of the signals of each column output in the power divider can be designed according to actual requirements.

In a specific example, the power of the signal output by each radio frequency channel or the power of the output signal of each power divider in this application can be determined by a Chebyshev antenna forming formula. Specifically, it includes determining the number of antenna columns, sidelobe, sidelobe suppression, and frequency, and then calculating the ratio of the power of the signal sent by each column antenna through the Chebyshev antenna forming formula and the above parameters.

For example, a radio frequency signal transmission system includes four radio frequency channels, two power dividers, and six columns of antennas, where the power divider includes two signal output interfaces. The signals output by the first radio frequency channel and the fourth radio frequency channel among the four radio frequency channels are respectively connected with the first power divider and the fourth power divider. The signals output by the second radio frequency channel and the third radio frequency channel are connected to a column of antennas, respectively. The two output signals of the first power divider are respectively output to the second and sixth columns of antennas, and the two output signals of the second power divider are respectively output to the first and fifth columns of antennas.

If, the Chebyshev antenna forming formula calculates the power ratio of the signals sent by the antennas of the first to sixth columns to be 4: 6: 10: 10: 6: 4. Then, the power division ratio of the first power divider and the second power divider is 6: 4.

In a specific embodiment of the present application, a matrix composed of signals mapped to respective radio frequency channels may be multiplied with an analog matrix to determine the signals output by each column in each channel. Of course, before performing power division processing on a signal of an RF channel, it also includes determining an analog matrix. In a specific embodiment of the present application, the number of rows of the analog matrix is determined according to the number of channels, and the number of columns of the analog matrix is determined according to the number of channels directly outputting signals to a column of antennas and the number of power division output signals.

In a specific embodiment of the present application, the number of the Y-th column and the X-th row in the simulation matrix is determined according to the ratio of the power of the Y-th channel data transmitted on the X-column antenna.

The signal input interface of the power divider is connected to the output signal of the radio frequency channel, and the output interface of the power divider is connected to a line of antennas. In a specific embodiment of the present application, the output interface of each power divider includes at least two. In a specific embodiment of the present application, the first power divider is connected to a first radio frequency channel. The first power divider includes a first power divider output interface and a second power divider output interface; the second power divider is connected to a fourth radio frequency. Channel connection, the second power divider includes a first power divider output interface and a second power divider output interface.

The signals output by the power divider, or signals not directly connected to the power divider output directly from a radio frequency channel are connected to a column of antennas respectively, and the corresponding signals are transmitted through the antenna array.

In a specific embodiment of the present application, a signal output by the first radio frequency channel is connected to the first power divider, and a signal output by the fourth radio frequency channel is connected to the second power divider. The first power divider and the second power divider include a first power divider output interface and a second power divider output interface, respectively. Therefore, the first power divider output interface of the second power divider is connected to the first column antenna, the first power divider output interface of the first power divider is connected to the second column antenna, and the signal output by the second channel is directly Connect to the third column antenna, connect the signal output from the third channel directly to the fourth column antenna, connect the second power divider output interface of the second power divider to the fifth column antenna, and connect the first power divider to the first The two power division output interface is connected to the sixth column antenna. Thus, a corresponding signal is transmitted through an array of antennas connected to the output interface.

An antenna is a converter that converts radio waves propagating on a transmission line into electromagnetic waves that propagate in an unbounded medium (usually free space), or vice versa. It should be noted that the direction of a row of antennas is fixed. In order to be suitable for various occasions, multiple rows of antennas working at the same frequency are fed and spaced according to certain requirements to form an antenna array. Is an antenna array. In an antenna array composed of multiple columns of antennas, each column of antennas has a serial number. For example, from 1 (the first column antenna) to M (the Mth column antenna), the two columns of adjacent sequence numbers are adjacent in the physical position of the antenna array. For example, the antennas of numbers 4 and 5 are adjacent.

In the embodiment of the present application, the number of antennas included in each column of antennas is determined according to the width of the beam in the vertical direction. When the width of the beam formed by the antenna array in the vertical direction is required to be wider, the number of antennas included in the antenna array is larger. When the width of the beam formed by the antenna array in the vertical direction is required to be narrower, the number of antennas included in the antenna array is smaller.

In the embodiment of the present invention, a larger number of antennas are driven by using a smaller number of radio frequency channels. Specifically, one radio frequency channel drives 1 to 2 columns of antennas. For antennas driven by the same radio frequency channel, it is called an antenna group, and then M antennas can form N antenna groups, and each antenna group includes 1 or 2 antennas.

It should be noted that, since M antennas form N antenna groups, and each antenna group includes 1 to 2 antennas, it is obvious that M is greater than N and less than or equal to 2N.

In the embodiment of the present application, the connection rules of the M-column antennas and the Z power dividers are:

The M-Z antennas in the middle sequence number of the M antennas are not connected to the power divider, and the remaining antennas are connected to the Z power dividers. Then, the M-column antenna is configured to form the target beam according to the radio frequency signal after the power distribution.

In the first example, when the number of antenna columns is an even number, there are antenna arrays composed of 8 columns of antennas, and the serial numbers of the 8 columns of antennas are 1, 2, 3 ... 7, 8 respectively.

If the radio frequency signal transmission system includes six radio frequency channels and two power dividers, the first radio frequency channel and the sixth radio frequency channel are connected to the power divider, respectively. Among them, one power division output interface of the first power divider connected to the first radio frequency channel is connected to the second column of antennas, and the other power division output interface of the first power divider is connected to the eighth column of antennas; One power division output interface of the connected second power divider is connected to the first column antenna, and the other power division output interface of the second power divider is connected to the seventh column antenna. The second to fifth radio frequency channels are directly connected to any one of the third to sixth antennas.

If the radio frequency signal transmission system includes four radio frequency channels and four power dividers, one power divider is connected to each radio frequency channel. One power divider output interface of one power divider connected to the first power divider is connected to the first column of antennas, and the other power divider output interface is connected to the fifth column of antennas; one power divider connected to the second power divider One of the power division output interfaces is connected to the antenna in the second column, and the other power division output interface is connected to the antenna in the sixth column. According to the above rule, the third and fourth power dividers are connected to the third, fourth, seventh and eighth antennas.

In the second example, when the number of antennas is odd, if there is an antenna array composed of 7 columns of antennas, the serial numbers of the 7 columns of antennas are 1, 2, 3, ... 7, respectively. If the radio frequency transmitting system includes 4 radio frequency channels and 3 power dividers, the first radio frequency channel is connected to the first power divider, and a power division output interface of the first power divider is connected to the first column antenna, and the first The other power divider output interface of the power divider is connected to the fifth column of antennas; the second RF channel is connected to the second power divider, and one power divider output interface of the second power divider is connected to the second column of antennas, and the second power divider The other power divider output interface of the splitter is connected to the sixth column of antennas; the third radio frequency channel is connected to the third power divider, and one of the power divider output interfaces of the third power divider is connected to the third column of antennas. The other power divider output interface is connected to the seventh column antenna. The fourth radio frequency channel is directly connected to the antenna 4, and the antenna with the serial number 4 can form a row of antennas.

In the specific embodiment of the present application, the output signals of the N radio frequency channels are sent to M antennas (M is greater than N), thereby avoiding the use of the phase shifter in the prior art, thereby greatly reducing the cost of the equipment. Similarly, fewer internal modules can reduce operating and maintenance costs and improve economic performance.

At the same time, in the specific embodiment of the present application, the four antennas connected to the four radio frequency channels are adjusted by the digital weighting module and the power divider to connect the six antennas to the four radio frequency channels. The aperture of the 6-row antenna is wider than that of the 4-row antenna, thereby increasing the gain of the antenna array. The wider the antenna, the higher the gain, the narrower the beam, and the more concentrated the radiated energy. When the beam is narrowed, the number of radiated beams can be increased. If the four-row antenna can only form one beam and serve one user at the same time, the six-row antenna can form three beams and can serve three users at the same time. The narrower the beam, the more the interference between the beams can be reduced. This application reduces the interference between the beams by forming a lower beam.

In the following, the method for transmitting the radio frequency signal by the base station is specifically described by way of an embodiment.

FIG. 3 is a radio frequency signal transmission method provided by a specific embodiment of the present application. As shown in FIG. 3, the method specifically includes:

S301. Obtain a baseband signal stream to be transmitted.

The baseband signal stream includes at least one baseband signal to be transmitted.

The digital weighting module included in the base station can receive the baseband signal stream that the base station needs to transmit. In a specific embodiment of the present application, the baseband signal stream to be transmitted received by the digital weighting module may include multiple baseband signals, and the number of baseband signals received by the digital weighting module is not limited in this application.

S302. Perform digital weighting on the obtained baseband signal stream to be transmitted, so as to map the baseband signal stream to be transmitted to multiple radio frequency channels and transmit the baseband signal stream mapped to each radio frequency channel to each radio frequency channel.

In a specific embodiment of the present application, the baseband signal stream to be transmitted is digitally weighted through an antenna mapping matrix. Digital weighting through the antenna mapping matrix is to multiply the obtained baseband signal stream to be transmitted by a digital matrix to map the baseband signal stream to be transmitted to multiple radio frequency channels.

Through mapping of the baseband signal flow, the baseband signal flow to be transmitted is mapped in each channel separately. When one baseband signal in the baseband signal stream to be transmitted is mapped to each radio frequency channel, the baseband signal has a certain phase difference between every two adjacent radio frequency channels. Optionally, the phase difference between the transmitted signals of the two adjacent radio frequency channels of the baseband signal is the same.

It should be noted that the main factor affecting the 3dB width of the beam and the sidelobe is the excitation amplitude of each column of the antenna array, and the main factor affecting the beam direction is the excitation phase of each column of the antenna array. A narrow beam with a low sidelobe needs to satisfy the phase difference and amplitude taper distribution of the antennas in the antenna array. The difference in the difference sequence is Δφ = nkd · sinθ (generally θ is 30 to 150 degrees). ), Where d is the column spacing between arrays, θ is the beam pointing, n is the sequence of the antenna, and k is 2 * π / wavelength.

The digital matrix is a matrix that makes a certain phase difference between the signals transmitted by each two adjacent radio frequency channels in the transmission signals of each radio frequency channel.

In a specific embodiment of the present application, the number matrix may be a matrix of n rows and z columns:

The number of rows n of the digital matrix is equal to the number of channels of the output signal of the digital weighting module, and the number of columns z of the digital matrix is equal to the number of signals to be transmitted received by the digital weighting module.

In one example, when the number of signals received by the digital matrix is three and the number of signals output by the digital matrix is four, the digital matrix is a matrix of four rows and three columns.

Therefore, the baseband signal stream to be transmitted is multiplied with a digital matrix to map the baseband signal stream to be transmitted to multiple radio frequency channels as follows:

among them,

Is a baseband signal stream, the baseband signal stream to be transmitted is a matrix of n rows and 1 column, and the number of rows of the baseband signal stream to be transmitted is equal to the number of acquired baseband signals to be transmitted.

It is a digital matrix. The value of n in the digital matrix is equal to the number of RF channels, and the value of z in the digital matrix is equal to the number of baseband signal streams to be transmitted. One row of the digital matrix represents the baseband signal stream allocated to one RF channel, one column represents the baseband signal to be transmitted, and each element in the digital matrix represents the phase of the baseband signal.

To allocate the baseband signal flow to each radio frequency channel, each line represents the baseband signal flow transmitted to one radio frequency channel.

In one example, the acquired baseband signal stream includes three baseband signals. The phase difference of the first signal s1 in different channels can be set to 90 degrees, the phase difference of the second signal s2 in different channels can be determined to be 0 degrees, and the phase difference of the third signal s3 in different channels can be determined as -90 degrees. If, "1" represents 0 degrees, "j" represents 90 degrees, "-1" represents 180 degrees, and "-j" represents -90 degrees.

Therefore, it can be determined that the digital matrix of the first signal s1 is "1, j, -1, -j"; the digital matrix of the second signal s2 is "1, 1, 1, 1"; the digital matrix of the third signal s3 is "-J, -1, j, 1".

The digital matrix of the three signals is thus obtained:

Of course, in the above example, the power mapped to each radio frequency channel is equal only as an example in the specific embodiment of the present application, and cannot be used to limit the present application. When the power mapped to each channel is not equal, each number in the digital matrix is used to represent the percentage of the signal's power on that channel.

In one example, when the number of signals input to the digital weighting module is s1, s2, and s3, and the digital matrix can be as shown in the above example, the input signal and the digital matrix are multiplied as:

Therefore, it can be known that the signal output by the first signal output interface of the digital weighting module is t1 = s1 + s2-s3 * j, and the signal output by the second signal output interface of the digital weighting module is t2 = s1 × j + s2-s3 The signal output by the third signal output interface of the digital weighting module is t3 = -s1 + s2 + s3 × j, and the signal output by the fourth signal output interface of the digital weighting module is t4 = -s1 × j + s2 + s3.

Optionally, the digital weighting module is further configured to transmit baseband signals mapped to each radio frequency channel to each radio frequency channel for transmission. The signal output interface of the digital weighting module is connected to each radio frequency channel, and the received baseband signal stream is further processed through each radio frequency channel.

In one example, in the specific embodiment of the present application, each radio frequency channel may be used to convert (baseband signal stream) digital signals output by the digital weighting module into analog signals, convert analog signals into high-frequency signals, and convert high-frequency signals. The signal is amplified. Of course, the foregoing steps of processing the signals by each radio frequency channel are only an example in the specific embodiments of the present application, and cannot be used to limit the present application. In a specific embodiment of the present application, the radio frequency channel may also perform other processing on the signal output by the digital weighting module.

S303. Perform power division processing on the transmission signals of at least one radio frequency channel among the multiple radio frequency channels. The power division processing is to distribute the power of the transmission signals of the at least one radio frequency channel to at least two antennas, respectively.

Performing power division processing on the transmitted signals of at least one radio frequency channel in the plurality of radio frequency channels may be performing power division processing on the first radio frequency channel. At least one radio frequency channel in the plurality of radio frequency channels is the first radio frequency channel.

In the specific embodiment of the present application, it is possible to determine which radio frequency channels need to perform power division processing according to various factors. And determine to which two columns of antennas each RF channel of the power division process will distribute the transmitted signal and the power division ratio of the two columns of antennas.

Performing power division processing on the transmission signals of at least one of the plurality of radio-frequency channels is to multiply a matrix composed of the transmission signals mapped to the radio-frequency channels by an analog matrix to obtain signals output by each column in the channel.

Of course, before performing power division processing on the transmitted signal of a radio frequency channel, it also includes determining the simulation matrix:

In the specific embodiment of the present application, the value of the number of rows y of the analog matrix is equal to the number of radio frequency channels, and the value of the number of columns of the analog matrix x is the sum of the number of radio frequency channels and the number of signals subjected to power division processing. equal. One row of the simulation matrix is used to indicate the radio frequency signal transmitted to one antenna, one column of the simulation matrix is used to indicate the transmitted signal of one radio frequency channel, and the sum of the elements of each column in the simulation matrix is less than or equal to 1.

In an example, the number of channels is 4 and the number of antennas is 6 (the sum of the number of columns of the channel directly outputting signals to the antenna and the number of columns of the output signals after division), then the simulation matrix is a matrix of 6 rows and 4 columns .

In a specific embodiment of the present application, the elements in the x-th column and the y-th row in the simulation matrix are determined according to the ratio of the power of the x-th channel data transmitted on the y antennas. For example, each column in the simulation matrix represents a channel. When the signal output by the channel is directly connected to the antenna, the number of rows in the matrix corresponding to the antenna position is 1. For example, if the second channel is directly connected to the third antenna, the third row in the second column in the simulation matrix is 1, and the other row in the second column is 0.

The transmission signals of each radio frequency channel and the transmission signals after power division processing and the transmission signals of multiple radio frequency channels other than the first radio frequency channel need to meet:

When the signal output by the radio frequency channel is output from the two output interfaces after being divided by the power divider and connected to two antennas, the number of rows corresponding to the antenna positions to which the two columns of output signals are connected is the proportion of the signal to the output signal of the channel . For example, the output signal of the first radio frequency channel outputs the first column signal and the second column signal through the first power divider, wherein the signal output by the first column output interface accounts for 70% of the output signal power of the first radio frequency channel, The signal output by the column output interface accounts for 30% of the output signal power of the first radio frequency channel. The first signal output by the first power divider is connected to the second antenna, and the first signal output by the first power divider is connected to the sixth antenna. Then the number in the first column and second row in the simulation matrix is

The number in column 1 and row 6 is

In one example, the antenna includes 6 columns of antennas and 4 channels. The first RF channel outputs a first signal and a second signal through a power divider. The first signal is connected to the antenna of the second column and the second signal is connected to the antenna of the 6 column. connection. The signal output by the second radio frequency channel is connected to the antenna in the third column; the signal output by the third radio frequency channel is connected with the antenna in the fourth column; the fourth radio frequency channel outputs the first signal and the second signal through the second power divider, and the first signal It is connected to the first antenna, and the second signal is connected to the fifth antenna. It can be known that the simulation matrix included in the first power divider and the second power divider is:

By calculating the analog matrix and the signal of the received radio frequency channel, the first power divider obtains the first output signal and the second output signal of the first power divider. The second power divider is configured to obtain a signal output by the first power divider and a second output signal.

Therefore, it can be known that the signal output from the first signal output interface of the second power divider connected to the first antenna is

The signal output from the first signal output interface of the first power divider connected to the second antenna is

The signal output from the second channel connected to the third antenna is s1 × j + s2-s3; the signal output from the fourth channel connected to the third antenna is -s1 + s2 + s3 × j; the second power component connected to the fifth antenna The signal output from the second signal output interface of the transmitter is

The signal output from the second signal output interface of the first power divider connected to the sixth antenna is

Of course, the above calculation is to completely express the technical solution of the present invention. In one example, a power divider may also only perform calculations related to signals received by the power divider. For example, in the above example, the first power divider and the second power divider only calculate signals output from two corresponding output interfaces, and the second radio frequency channel and the third radio frequency channel directly perform radio frequency calculation without related calculations. The signal from the channel is sent to the antenna.

After the power divider calculates the results of the signals output by the column, it will further calculate the results and send the corresponding signals to the corresponding antennas.

For the RF channel that is not connected to the power divider, send the transmitted signal to the corresponding antenna.

S304. Transmit a radio frequency signal.

The antenna converts the received signal into a radio frequency signal and sends it.

The radio frequency signal includes: a power-division-processed transmission signal in each first radio frequency channel, or a radio frequency signal other than the first radio frequency channel in the plurality of radio frequency channels except the first radio frequency channel. The transmitted signal of the channel.

Each radio frequency channel or each column in each radio frequency channel sends a corresponding signal to a connected column of antennas according to the calculation result. The antenna transmits the received signal.

FIG. 4 is a radio frequency signal transmitting device provided by a specific embodiment of the present application. As shown in FIG. 4, it includes an obtaining unit 401, a processing unit 402, and a sending unit 403.

The obtaining unit 401 is configured to obtain a baseband signal stream to be transmitted, where the baseband signal stream includes at least one baseband signal.

The processing unit 402 is configured to digitally weight the acquired baseband signal stream to be transmitted, so as to map the baseband signal stream to be transmitted to multiple radio frequency channels and transmit the baseband signal stream mapped to each radio frequency channel to each radio frequency channel. Each baseband signal in the baseband signal flow to each radio frequency channel has a phase difference between every two adjacent radio frequency channels.

The processing unit 402 is further configured to perform power division processing on a transmission signal of the first radio frequency channel. The first radio frequency channel is one or more radio frequency channels of multiple radio frequency channels. The power division processing is to separate each of the first radio frequency channels. The power of the transmitted signal is distributed to at least two columns of antennas, respectively.

The sending unit 403 is configured to send a radio frequency signal. The radio frequency signal includes: a transmission signal after power division processing of each first radio frequency channel, or a transmission signal after power division processing of each first radio frequency channel and a plurality of radio frequency channels. Transmit signals of radio frequency channels other than the first radio frequency channel.

Digitally weighting the baseband signal stream to be transmitted is to satisfy the baseband signal stream to be transmitted and the baseband signal stream to each radio frequency channel:

among them,

Is a digital matrix of n rows and z columns. The value of n in the digital matrix is equal to the number of RF channels. The value of z in the digital matrix is equal to the number of acquired baseband signals to be transmitted. One row of the digital matrix is used to represent one RF channel. A column in the digital matrix is used to indicate the phase with which a baseband signal is assigned to a different RF channel.

The transmission signals of each radio frequency channel and the transmission signals after power division processing of the first radio frequency channel and the transmission signals of multiple radio frequency channels other than the first radio frequency channel need to satisfy:

among them,

A matrix formed for the transmitted signals of each radio frequency channel,

The processing unit 402 is further configured to perform digital-to-analog conversion and frequency modulation on the baseband signals transmitted to the respective radio frequency channels before performing power division processing on the signals transmitted by the first radio frequency channel to convert the digital signals of the baseband signals to analog High-frequency signals.

Each baseband signal in the baseband signal stream mapped by the processing unit 402 to each radio frequency channel has the same phase difference between every two adjacent radio frequency channels.

A specific embodiment of the present application provides a computer-readable storage medium that stores one or more programs. The one or more programs include instructions. When the instructions are executed by an electronic device including multiple application programs, The electronic device shown performs the method flow shown in FIG. 1-2.

A specific embodiment of the present application also proposes a computer program product, which can be used to run an access network device. When the computer program product runs on an access network device, the access network device is caused to execute the methods shown in FIG. 1 to FIG. 2.

It should be noted that the embodiments provided in this application are only optional embodiments described in this application, and those skilled in the art can design more embodiments based on this, so they are not described here.

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 herein 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.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments, and are not repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of units is only a logical function division. In actual implementation, there may be another division manner. For example, multiple units or components may be combined or integrated. To another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, which may be electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objective of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each of the units may exist separately physically, or two or more units may be integrated into one unit.

If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially a part that contributes to the existing technology or a part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device) or a processor to perform all or part of the steps of the methods in the embodiments of the present application. The foregoing storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disks or optical disks and other media that can store program codes .

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

Claims

A method for transmitting a radio frequency signal, comprising:

Acquiring a baseband signal stream to be transmitted, where the baseband signal stream includes at least one baseband signal;

Digitally weighting the acquired baseband signal stream to be transmitted to map the baseband signal stream to be transmitted to multiple radio frequency channels and transmitting the baseband signal stream mapped to each radio frequency channel to each radio frequency channel, the mapping Each baseband signal in the baseband signal flow to each radio frequency channel has a phase difference between every two adjacent radio frequency channels;

Performing power division processing on a transmission signal of a first radio frequency channel, where the first radio frequency channel is one or more radio frequency channels of the plurality of radio frequency channels, and the power division processing is to divide each of the first radio frequency channels The power of the transmitted signal is allocated to at least two antennas respectively;

Sending a radio frequency signal, the radio frequency signal includes: a transmission signal after power division processing of each of the first radio frequency channels, or a transmission signal after power division processing of each of the first radio frequency channels and the plurality of radio frequency channels Transmitting signals of other radio frequency channels except the first radio frequency channel.
The method according to claim 1, wherein the digitally weighting the baseband signal stream to be transmitted is such that the baseband signal stream to be transmitted and the baseband signal stream transmitted to each radio frequency channel satisfy:

among them,
A matrix of one row and n columns formed for the baseband signal stream to be transmitted, where the value of n is equal to the number of acquired baseband signals to be transmitted;
A matrix formed for the baseband signal stream transmitted to each radio frequency channel; said
Is a digital matrix of n rows and z columns. The value of n in the digital matrix is equal to the number of radio frequency channels. The value of z in the digital matrix is equal to the number of acquired baseband signals to be transmitted. One row is used to represent an RF channel, and one column in the digital matrix is used to represent the phase that is assigned to a different RF channel from a baseband signal.
The method according to claim 1, characterized in that the transmission signals of each radio frequency channel and the transmission signals after power division processing of the first radio frequency channel and the radio frequency channels of the plurality of radio frequency channels other than the first radio frequency channel are The transmitted signal needs to meet:

among them,
A matrix formed for the transmitted signals of each radio frequency channel,
A matrix formed by the power division processed transmission signal of the first radio frequency channel and the transmission signals of multiple radio frequency channels other than the first radio frequency channel,
Is a simulation matrix of y rows and x columns. The value of x in the simulation matrix is equal to the sum of the number of radio frequency channels and the number of signals subjected to power division processing. The value of y in the simulation matrix is the same as the number of radio frequency channels; The elements in the a-th column and the b-th row in the simulation matrix are determined according to the ratio of the power transmitted on the b antennas of the a-channel data, where a is greater than or equal to 1 and less than or equal to x, and b is greater than or equal to 1 and less than or equal to y.
The method according to claim 1, wherein before the performing power division processing on the transmission signal of the first radio frequency channel, the method further comprises:

Digital-to-analog conversion and frequency modulation are respectively performed on the baseband signal streams transmitted to each radio frequency channel, so as to convert the digital signals of the baseband signal streams into analog high-frequency signals.
The method according to claim 1, wherein each baseband signal in the baseband signal stream mapped to each radio frequency channel has an equal phase difference between every two adjacent radio frequency channels.
A radio frequency signal transmission system, characterized by comprising a digital weighting module, N radio frequency channels, M column antennas, and Z power dividers, where N is a positive integer greater than 0, M is greater than N and less than or equal to 2N Positive integer, MN equals Z;

The digital weighting module is configured to obtain a baseband signal stream to be transmitted, where the baseband signal stream includes at least one baseband signal;

The digital weighting module is further configured to perform digital weighting on the acquired baseband signal stream to be transmitted, so as to map the baseband signal stream to be transmitted to N radio frequency channels and map to the baseband of the N radio frequency channels. The signal flow is transmitted to N radio frequency channels, and each baseband signal in the baseband signal flow mapped to the N radio frequency channels has a phase difference between every two adjacent radio frequency channels;

The N radio frequency channels are respectively used for digital-to-analog conversion and frequency modulation of the baseband signal stream mapped to the N radio frequency channels, so as to convert the digital signal of the baseband signal stream into an analog high-frequency signal;

The Z power dividers are respectively used to perform power division processing on a transmission signal of the first video channel, and the first radio frequency channel is one or more radio frequency channels among the N radio frequency channels. The power division processing is Allocating the power of the transmitted signal of each of the first radio frequency channels to at least two columns of antennas;

The M columns of antennas are respectively used to transmit radio frequency signals, and the video signals include: each of the first radio frequency channels are subjected to power division processing, or each of the first radio frequency channels are subjected to power division processing. And the transmission signals of the other radio frequency channels except the first radio frequency channel among the N radio frequency channels.
The system according to claim 6, wherein the digitally weighting the baseband signal stream to be transmitted is such that the baseband signal stream to be transmitted and the baseband signal stream transmitted to each radio frequency channel satisfy:

among them,
A matrix of one row and n columns formed for the baseband signal stream to be transmitted, where the value of n is equal to the number of acquired baseband signals to be transmitted;
A matrix formed by baseband signal streams transmitted to each radio frequency channel, said
Is a digital matrix of n rows and z columns, the value of n in the digital matrix is equal to the number of radio frequency channels, and the value of z in the digital matrix is equal to the number of acquired baseband signals to be transmitted; the digital matrix One row in is used to indicate a radio frequency channel, and one column in the digital matrix is used to indicate the phase assigned to a different radio frequency channel from a baseband signal.
The system according to claim 6, characterized in that the transmission signals of the N radio frequency channels are power-divided with the transmission signals of the first radio frequency channel and other radio frequencies of the radio frequency channels other than the first radio frequency channel. The transmitted signal of the channel needs to meet:

among them,
A matrix formed for the transmitted signals of each radio frequency channel,
A matrix formed by the power division processed transmission signal of the first radio frequency channel and the transmission signals of multiple radio frequency channels other than the first radio frequency channel,
Is a simulation matrix of y rows and x columns. The value of x in the simulation matrix is equal to the sum of the number of radio frequency channels and the number of signals subjected to power division processing. The value of y in the simulation matrix is the same as the number of radio frequency channels; The elements in the a-th column and the b-th column of the simulation matrix are determined according to the proportion of the power transmitted by the data of the a-channel on the b-antenna, where a is greater than or equal to 1 and less than or equal to x, and b is greater than or equal to 1 and less than or equal to y.
The system according to claim 6, wherein the number of baseband signal streams to be transmitted received by the digital weighting module is 3, the number of N radio frequency channels is 4, and the number of M column antennas is 6. The number of the Z power dividers is two.
The system according to claim 6, wherein each baseband signal in the baseband signal stream mapped to the N radio frequency channels has an equal phase difference between every two adjacent radio frequency channels.
A radio frequency signal transmitting device, comprising:

An obtaining unit, configured to obtain a baseband signal stream to be transmitted, where the baseband signal stream includes at least one baseband signal;

A processing unit, configured to digitally weight the acquired baseband signal stream to be transmitted to map the baseband signal stream to be transmitted to multiple radio frequency channels and to flow the baseband signal mapped to each radio frequency channel to each radio frequency channel Transmitting, each baseband signal in the baseband signal stream mapped to each radio frequency channel has a phase difference between every two adjacent radio frequency channels;

The processing unit is further configured to perform power division processing on a transmission signal of a first radio frequency channel, where the first radio frequency channel is one or more radio frequency channels of the multiple radio frequency channels, and the power division processing is to divide The power of the transmitted signal of each of the first radio frequency channels is allocated to at least two columns of antennas respectively;

The sending unit is configured to send a radio frequency signal, where the radio frequency signal includes: a transmission signal after power division processing of each of the first radio frequency channels, or a transmission signal and Transmitting signals of the radio frequency channels other than the first radio frequency channel among the plurality of radio frequency channels.
The apparatus according to claim 11, wherein the digitally weighting the baseband signal stream to be transmitted is such that the baseband signal stream to be transmitted and the baseband signal stream transmitted to each radio frequency channel satisfy:

among them,
A matrix of one row and n columns formed for the baseband signal stream to be transmitted, where the value of n is equal to the number of acquired baseband signals to be transmitted;
A matrix formed by baseband signal streams transmitted to each radio frequency channel, said
Is a digital matrix of n rows and z columns, the value of n in the digital matrix is equal to the number of radio frequency channels, the value of z in the digital matrix is equal to the number of acquired baseband signals to be transmitted, the digital matrix One row in is used to indicate a radio frequency channel, and one column in the digital matrix is used to indicate the phase assigned to a different radio frequency channel from a baseband signal.
The device according to claim 11, characterized in that the transmission signals of each radio frequency channel and the transmission signals after power division processing of the first radio frequency channel and the radio frequency channels of the plurality of radio frequency channels except for the first radio frequency channel The transmitted signal needs to meet:

among them,
A matrix formed for the transmitted signals of each radio frequency channel,
A matrix formed by the power division processed transmission signal of the first radio frequency channel and the transmission signals of radio frequency channels other than the first radio frequency channel in the plurality of radio frequency channels,
Is a simulation matrix of y rows and x columns. The value of x in the simulation matrix is equal to the sum of the number of radio frequency channels and the number of signals subjected to power division processing. The value of y in the simulation matrix is the same as the number of radio frequency channels; The elements in the a-th column and the b-th row in the simulation matrix are determined according to the ratio of the power transmitted on the b antennas of the a-channel data, where a is greater than or equal to 1 and less than or equal to x, and b is greater than or equal to 1 and less than or equal to y.
The apparatus according to claim 11, wherein the processing unit, before performing power division processing on the transmission signal of the first radio frequency channel, further comprises:

The processing unit is configured to perform digital-to-analog conversion and frequency modulation on a baseband signal stream transmitted from each radio frequency channel, so as to convert a digital signal of the baseband signal stream into an analog high-frequency signal.
The apparatus according to claim 11, wherein each baseband signal in the baseband signal stream mapped to each radio frequency channel has an equal phase difference between every two adjacent radio frequency channels.