WO2018098634A1

WO2018098634A1 - Transceiver, base station, and signal processing method

Info

Publication number: WO2018098634A1
Application number: PCT/CN2016/107747
Authority: WO
Inventors: 赵建平; 李向华; 李晨雷; 沈龙
Original assignee: 华为技术有限公司
Priority date: 2016-11-29
Filing date: 2016-11-29
Publication date: 2018-06-07

Abstract

Embodiments of the invention disclose a transceiver, a base station, and a signal processing method, which relate to the field of communications, and reduce a search time and improve communication quality while reducing the calculation complexity and calculation processing time of a baseband part. The solution is as follows: a transmit module converts a first baseband signal into a first radio frequency signal, performs beamforming on the first radio frequency signal by means of HBF, and then transmits the first radio frequency signal via a passive frontend module and an antenna module; a receive module receives a second radio frequency signal via the antenna module and the passive frontend module, converts the second radio frequency signal into a second baseband signal, and transmits the second baseband signal to a digital medium frequency module; and the digital medium frequency module performs amplitude-phase weighting on the second baseband signal by means of DBF, and then transmits the second baseband signal to a baseband module; alternatively, the digital medium frequency module transmits the second baseband signal to the baseband module, and the baseband module performs amplitude-phase weighting on the second baseband signal by means of DBF.

Description

Transceiver, base station and signal processing method

Technical field

The embodiments of the present invention relate to the field of communications, and in particular, to a transceiver, a base station, and a signal processing method.

Background technique

With the continuous development of communication technologies and mobile bandwidth services, the fifth generation of mobile communication technology (5G) networks emerged. Since the high frequency has a large bandwidth resource, the access or backhaul system of the 5G network can use the centimeter wave and the millimeter wave of the high frequency band such as 15 GHz, 28 GHz, 38 GHz, 60 GHz, and 73 GHz as the operating frequency. Moreover, the use of high frequency as the operating frequency of the access or backhaul system of the 5G network can not only improve the data transmission rate of the 5G network, but also, because of its small wavelength, the size of the antenna module is small, and therefore, the transceiver also Multiple antenna modules can be integrated.

However, compared with the low frequency of less than 3 GHz, the transmission loss of high frequency such as a centimeter wave or a millimeter wave is large. In the prior art, the antenna gain and the received signal power of the transceiver can be improved by adopting a beamforming method, that is, by arranging a plurality of antenna modules integrated in the transceiver to form a directional beam, thereby overcoming the high frequency. Transmission loss. At present, the commonly used beamforming methods are: Digital Beam Forming (DBF) and Hybrid Beam Forming (HBF).

In the process of implementing the beamforming described above, at least the following problems exist in the prior art:

(1) Since the DBF implements beamforming in the data domain (the digital domain refers to the baseband portion or the digital intermediate frequency portion), the transceiver using the DBF usually requires multiple transceiver channels. However, a large number of transceiver channels increase the cost and power consumption of the transceiver. And the ADC included in a large number of transceiver channels samples a large amount of data, which greatly increases the computational complexity and computation processing time of the baseband portion.

(2) The HBF is beamformed by adding a phase shifter (PS) to the transceiver channel. The PS is generally a digitally controlled discontinuous phase shifter. After the control signal for setting the phase value of the PS is sent to the PS, the PS needs to pass a certain time (the The time is called the settling time) and can be stabilized to the phase value to be set. In addition, since the user equipment sends a reference signal to the base station through one transmit beam during the beam search process, the base station needs to traverse all the receive beams to receive the reference signal sent by the user equipment. This requires the user equipment to traverse the direction of all receive beams every time the reference signal is sent by the user equipment. In this way, if the base station uses the HBF transceiver, it needs to spend at least one settling time when performing the beam search (the number of stable times consumed by the base station is the same as the number of receiving beams), which results in the base station. When the number of receiving beams is large, the search process takes a lot of time.

In addition, systems using high frequencies as operating frequencies typically employ a time division duplex (TDD) scheme to achieve the dissimilarity between the transmit and receive modules. Since the channel information changes in real time during the communication between the base station and the user equipment, after the receiving module in the base transceiver station obtains the channel information reported by the user equipment, the transmitting module in the transceiver needs to obtain the channel information obtained by the receiving module. The modulation order and coding efficiency are adjusted in real time to ensure a low bit error rate. However, since the receiving module of the HBB transceiver includes a PS, a power amplifier (PA), a combiner, etc., these devices introduce additional delays, so that the receiving module acquires channel information, which causes a delay. This causes the transmitting module to adjust the modulation order and coding efficiency to delay, which ultimately leads to a decline in communication quality.

Summary of the invention

Embodiments of the present invention provide a transceiver, a base station, and a signal processing method, which reduce the search complexity and improve the communication quality while reducing the computational complexity of the baseband portion and calculating the processing time.

To achieve the above objective, the embodiment of the present invention adopts the following technical solutions:

A first aspect of the embodiments of the present invention provides a transceiver, including: a baseband module, a digital intermediate frequency module, at least one transmitting module, at least one receiving module, and at least one passive front end module. The baseband module is connected to the at least one transmitting module through the digital intermediate frequency module, and is further connected to the at least one receiving module. The at least one transmitting module is further connected to the antenna module through the at least one passive front end module, and the at least one receiving module further passes at least one passive module. The front end module is connected to the antenna module.

Each of the at least one transmitting module is configured to convert the first baseband signal generated by the baseband module and the digital intermediate frequency module into a first radio frequency signal, and perform beamforming on the first radio frequency signal by using the HBF, and a passive front-end module connected to the transmitting module, and transmitting, by the antenna module connected to the passive front-end module, a beam-shaped first radio frequency signal; each receiving module of the at least one receiving module is configured to correspond to the receiving module The antenna module receives the second RF signal through the passive front end module connected to the antenna module, and converts the second RF signal into a second baseband signal and transmits the signal to the digital intermediate frequency module, so that the digital intermediate frequency module adopts the DBF to the second baseband signal. Performing amplitude and phase weighting, transmitting the second baseband signal weighted by the amplitude phase to the baseband module, or, after the digital intermediate frequency module transmits the second baseband signal to the baseband module, the baseband module uses DBF to perform amplitude and phase weighting on the second baseband signal .

In the transceiver provided by the embodiment of the invention, the transmitting module adopts HBF for beamforming, which can effectively reduce the number of transceiver channels of the transceiver, thereby reducing the cost and power consumption of the transceiver, and reducing the baseband portion. Calculate complexity and calculate processing time. At the same time, when performing RF signal reception, DBF is used for beamforming, so that no beam-searching time is required, and the beam search time can be effectively reduced, and the receiving module does not include devices such as PS, PA, and combiner. Therefore, the channel information can be quickly obtained, so that the modulation order and coding efficiency can be quickly adjusted, and the communication quality is improved.

In combination with the first aspect, in a possible implementation, each of the at least one transmitting module may include: a digital-to-analog converter (DAC) for implementing frequency conversion, amplification, and filtering. Circuit, splitter, PS, and power amplifier; the input of the DAC is connected to the digital intermediate frequency module, and the output is connected to the input of the circuit for implementing frequency conversion, amplification, and filtering, and the circuit for implementing frequency conversion, amplification, and filtering The output end is connected to the input end of the power splitter, one output end of the power splitter is connected to the input end of the PS, and the output end of the PS is connected to the corresponding passive front end module.

With reference to the first aspect and the foregoing possible implementation manner, in another possible implementation manner, each of the at least one receiving module may include: a low noise amplifier (LNA), used to implement frequency conversion, Amplified and filtered circuits and analog to digital converters (ADCs); LNA inputs The end is connected to the corresponding passive front end module, the output end is connected to the input end of the circuit for realizing frequency conversion, amplification and filtering, and the output end of the circuit for realizing the frequency conversion, amplification and filtering is connected with the input end of the ADC, and the ADC The output is connected to the digital intermediate frequency module.

With reference to the first aspect and the foregoing possible implementation manner, in another possible implementation manner, each of the at least one transmitting module is specifically configured to perform radio frequency phase shifting, analog intermediate frequency phase shifting on the first radio frequency signal, or The local oscillator phase shift performs beamforming.

In combination with the first aspect and the foregoing possible implementation manners, in another possible implementation manner, in order to achieve fast sampling of the reference signal and ensure stability of time delay and capacity for communication with the user equipment, the transceiver further The method may include: at least one reference signal processing module and at least one coupler; a reference signal processing module is coupled to a receiving module through a coupler; at least one reference signal processing module is further coupled to the digital intermediate frequency module; and at least one reference signal module Each reference signal processing module is configured to sample the third RF signal coupled by the receiver module and output the sampled signal to the digital intermediate frequency module.

In combination with the first aspect and the foregoing possible implementation manners, in another possible implementation manner, each of the at least one reference signal processing module may include: a low speed ADC.

With reference to the first aspect and the foregoing possible implementation manner, in another possible implementation manner, each of the at least one passive front-end module may include: a filter, a circulator, and a switch; One end is connected to a transmitting module, the second end is connected to the first end of the filter, the third end is connected to the first end of the switch, the second end of the switch is connected to a receiving module, and the second end of the filter is The antenna module is connected.

With reference to the first aspect and the foregoing possible implementation manners, in another possible implementation manner, each of the at least one passive front end module may include: a filter and a circulator; the first end of the circulator Connected to a transmitting module, the second end is connected to a receiving module, the third end is connected to the first end of the filter, and the second end of the filter is connected to an antenna module.

In combination with the first aspect and the foregoing possible implementation manner, in another possible implementation manner, each of the at least one passive front-end module may include: filtering The first end of the switch is connected to a transmitting module, the second end is connected to a receiving module, the third end is connected to the first end of the filter, and the second end of the filter is connected to an antenna module.

A second aspect of the embodiments of the present invention provides a base station, including: a transceiver, an antenna module, and a main control module in a possible implementation manner according to the first aspect or the first aspect;

The antenna module is configured to transmit a first radio frequency signal after the beam shaping of the transceiver, receive the second radio frequency signal, and transmit the second radio frequency signal to the transceiver;

The main control module is used to configure and set up the transceiver and provide clock for the transceiver.

A third aspect of the embodiments of the present invention provides a signal processing method that is applied to the first aspect or the possible implementation of the first aspect, and the method may include:

Generating a first baseband signal, converting the first baseband signal into a first radio frequency signal, using a HBF for beamforming the first radio frequency signal, transmitting a beamformed first radio frequency signal, and receiving a second radio frequency signal, and second The RF signal is converted into a second baseband signal, and the second baseband signal is amplitude-weighted by DBF.

With reference to the third aspect, in a possible implementation manner, the first radio frequency signal is beamformed by using the HBF, and specifically, the method includes: performing radio frequency phase shifting, analog intermediate frequency phase shifting, or local oscillator phase shifting on the first radio frequency signal. Beamforming is performed.

With reference to the third aspect and the foregoing possible implementation manners, in another possible implementation manner, in order to implement fast sampling of the reference signal and ensure stability of time delay and capacity for communication with the user equipment, the method may also The method includes: coupling a third RF signal, and sampling the third RF signal.

DRAWINGS

1 is a schematic diagram of a circuit structure of a conventional transceiver using DBF provided by the prior art;

2 is a schematic diagram showing the circuit structure of a conventional transceiver using HBF provided by the prior art;

3 is a schematic diagram of a circuit structure of another conventional transceiver using HBF provided by the prior art;

4 is a circuit diagram of another conventional transceiver using HBF provided by the prior art. Schematic;

FIG. 5 is a schematic structural diagram of a circuit of a transceiver according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of a passive front end module according to an embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of another passive front end module according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of another passive front end module according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of another circuit of a transceiver according to an embodiment of the present disclosure;

FIG. 10 is a schematic structural diagram of another circuit of a transceiver according to an embodiment of the present disclosure;

FIG. 11 is a schematic structural diagram of another circuit of a transceiver according to an embodiment of the present disclosure;

FIG. 12 is a schematic structural diagram of another circuit of a transceiver according to an embodiment of the present disclosure;

FIG. 13 is a schematic structural diagram of another circuit of a transceiver according to an embodiment of the present disclosure;

FIG. 14 is a schematic structural diagram of another circuit of a transceiver according to an embodiment of the present disclosure;

FIG. 15 is a schematic structural diagram of a base station according to an embodiment of the present disclosure;

FIG. 16 is a flowchart of a signal processing method according to an embodiment of the present invention.

detailed description

Currently, beamforming methods can overcome high frequency transmission losses. Commonly used beamforming methods are: DBF and HBF.

Among them, DBF can achieve beamforming in the digital domain. A circuit diagram of a transceiver using a DBF can be as shown in FIG. The transceivers using the DBF may specifically include: a baseband module, a digital intermediate frequency module, and multiple transceiver channels. The multi-channel transceiver channel is connected to the antenna array, and the number of antenna modules included in the antenna array is the same as the number of channels of the transceiver channel. The baseband module is connected to the multiple transceiver channels through the digital intermediate frequency module. Each transceiver channel is connected to an antenna module. Each transceiver channel includes: ADC, DAC, mixer, PA, circulator, LNA, and band-pass filter (BPF). The specific connection method and quantity of each device can be seen in Figure 1. The mixer is used to implement the frequency conversion function, that is, up-converting the low-frequency signal to a high-frequency signal, or down-converting the high-frequency signal to a low-frequency signal.

In the transceiver using DBF, the beam direction adjustment can be realized by adjusting the weighting value when the baseband portion or the digital intermediate frequency portion weights the multiple baseband signals. However, the transceiver using DBF increases the cost and power consumption of the transceiver because it requires multiple transceiver channels. Moreover, since a large number of ADCs included in the transceiver channel sample a large amount of data, the calculation complexity and calculation processing time of the baseband portion are increased.

HBF can implement beamforming in the analog domain, as well as beamforming in the analog domain and data. HBF can be implemented in different ways. Among them, there are three common implementation methods: analog intermediate frequency phase shift, local oscillator phase shift, and radio frequency phase shift.

Figure 2-4 shows the circuit structure of a transceiver using HBF. Among them, Figure 2 uses the analog IF phase shift to achieve HBF, Figure 3 uses the local oscillator phase shift to achieve HBF, and Figure 4 uses the RF phase shift to achieve HBF. Specifically, the transceiver using the HBF may include: a baseband module, a digital intermediate frequency module, and multiple transceiver channels. The transceiver channel is connected to the antenna module (all antenna modules connected to the transceiver channel form an antenna array), and each transceiver channel may include a transmitting module, a receiving module and a local oscillator (LO), and the transmitting module includes: DAC, low A low-pass filter (LPF), an amplifier (AMP), a power splitter, a PS, a mixer, and a PA, and a receiving module includes: an LNA, a mixer, a PS, a combiner, an AMP, an LPF, and an ADC. Figure 2-4 shows an example in which the HBF includes one transceiver channel, and one transceiver channel is connected to the eight antenna modules. The specific connection mode and number of devices can be as shown in Figure 2-4.

What can be obtained is that when the beamforming is implemented by using the HBF, the receiving module includes devices such as PS, PA, combiner, etc., and these devices introduce additional delays, so that the receiving module acquires channel information, which may cause delay. The transmitting module adjusts the modulation order and The coding efficiency is delayed, eventually leading to a decline in communication quality.

In addition, when the analog IF phase shift, the local frequency shift phase, and the RF frequency shift phase are used to realize the HBF, the phase shift value of each PS in the transmitting module can be adjusted to adjust the direction of the transmitting beam, and the receiving module is adjusted. The phase shift value of each PS realizes the adjustment of the direction of the receiving beam.

It is also well known that in systems using high frequency as the operating frequency, the beamforming technique can increase the system gain, but the width of the receiving beam and the transmitting beam are both narrow. In order to enable the user equipment to access the base station normally and maintain stable communication, both the user equipment and the base station are required to have beam searching and tracking capabilities. At present, high-frequency beam search methods mainly include traversal search and hierarchical search. Illustratively, in the traversal search method, the user equipment needs to sequentially transmit reference signals to the base station through different transmit beams. For each transmit beam, the base station needs to traverse all the receive beams in sequence to receive the user equipment through the transmit beam. The reference information, that is, the base station needs to adjust the phase shift value of each PS in the receiving module multiple times to implement beam search. However, since the PS needs to pass the stabilization time to stabilize the phase value to be set when adjusting the phase shift value of the PS, the search process takes a lot of time. Moreover, as the number of beams increases, the time resource overhead will be greater.

In order to reduce the search time and improve the communication quality while reducing the computational complexity of the baseband portion and the processing time, an embodiment of the present invention provides a transceiver. As shown in FIG. 5, the transceiver includes The baseband module 11, the digital intermediate frequency module 12, the at least one transmitting module 13, the at least one receiving module 14, and the at least one passive front end module 15.

The baseband module 11 is connected to the at least one transmitting module 13 through the digital intermediate frequency module 12, and is also connected to the at least one receiving module 14. The at least one transmitting module 13 is also connected to the antenna module 16 through at least one passive front end module 15, at least one receiving The module 14 is also connected by at least one passive front end module 15 antenna module 16.

In the embodiment of the present invention, there may be two specific connection manners between the at least one transmitting module 13, the at least one receiving module 14, the at least one passive front end module 15 and the antenna module 16.

Method 1: A transmitting module 13 can be connected to a receiving module 14 The passive front end module 15 is also connected to an antenna module 16. In this manner, the transmitting module 13 and the receiving module 14 share an antenna module 16, that is, a transmitting and receiving common antenna.

Manner 2: A transmitting module 13 and a receiving module 14 are respectively connected to different passive front end modules 15, and each passive front end module 15 is respectively connected with a different antenna module 16. In this manner, the transmitting module 13 and the receiving module 14 do not share the antenna module 16, that is, transmit and receive non-common antennas. And in this manner, the transceiver includes at least two passive front end modules.

In addition, in the foregoing manners 1 and 2, the specific connection manner between the transmitting module 13 and the passive front end module 15 may be three types: full connection, sub-array connection, and partial connection.

Wherein, when the connection mode of the transmitting module 13 and the passive front end module 15 is fully connected, each transmitting module 13 included in the transceiver is connected to all passive front end modules 15 included in the transceiver. When the connection mode of the transmitting module 13 and the passive front end module 15 is a sub-array connection, each transmitting module 13 included in the transceiver is connected to a part of the passive front end module 15 included in the transceiver, and different transmitting modules 13 are connected. The passive front end module 15 is different. When the connection mode of the transmitting module 13 and the passive front end module 15 is partially connected, each transmitting module 13 included in the transceiver is connected to a part of the passive front end module 15 included in the transceiver, and the different transmitting modules 13 are connected. The passive front end modules 15 can be identical.

It should be noted that FIG. 5 is a connection manner between at least one transmitting module 13 , at least one receiving module 14 , at least one passive front end module 15 and the antenna module 16 , and the transmitting module 13 and the passive front end module 15 The specific connection is a partial connection, and each transmitting module 13 is connected to only one passive front end module 15 as a transceiver provided by the illustrated embodiment of the present invention. The specific structure of the transceiver is similar to that of FIG. 5 in other manners, and the embodiments of the present invention are not described herein again.

Each of the at least one transmitting module 13 is configured to convert the first baseband signal generated by the baseband module 11 and the digital intermediate frequency module 12 into a first radio frequency signal, and perform beamforming on the first radio frequency signal by using the HBF. Passing with the transmitting module 13 The connected passive front end module 15 is connected to the passive front end module 15 to transmit the beamformed first radio frequency signal to the antenna module 16.

Each of the at least one receiving module 14 is configured to receive a second RF signal via the antenna module 16 corresponding to the receiving module 14 via the passive front end module 15 connected to the antenna module 16, and the second The RF signal is converted into a second baseband signal and transmitted to the digital intermediate frequency module 12, so that the digital intermediate frequency module 12 uses the DBF to perform amplitude and phase weighting on the second baseband signal, and transmits the amplitude-weighted second baseband signal to the baseband module 11, or After the digital intermediate frequency module 12 transmits the second baseband signal to the baseband module 11, the baseband module 11 uses the DBF to perform amplitude and phase weighting on the second baseband signal.

In an embodiment of the present invention, further, each of the at least one transmitting module 13 may include: a DAC, a circuit for implementing frequency conversion, amplification, and filtering, a power splitter, a PS, and a power amplifier; wherein, the DAC The input end is connected to the digital intermediate frequency module 12, and the output end is connected to the input end of the circuit for realizing frequency conversion, amplification and filtering, and is used for realizing the connection between the output end of the circuit for frequency conversion, amplification and filtering and the input end of the power splitter. One output of the power splitter is connected to the input of the PS, and the output of the PS is connected to the corresponding passive front end module 15.

In an embodiment of the present invention, further, each of the at least one receiving module 14 may include: an LNA, a circuit for implementing frequency conversion, amplification, and filtering, and an ADC; an input end of the LNA and a corresponding passive front end Module 15 is connected, the output is connected to the input of the circuit for implementing frequency conversion, amplification and filtering, and the output of the circuit for converting, amplifying and filtering is connected to the input of the ADC, and the output of the ADC and the digital intermediate frequency module are connected. 12 connections.

In the embodiment of the present invention, each of the at least one transmitting module 13 is specifically configured to perform beamforming on the first radio frequency signal by using radio frequency phase shifting, analog intermediate frequency phase shifting, or local oscillator phase shifting.

In the embodiment of the present invention, when the specific connection manner between the at least one transmitting module 13, the at least one receiving module 14, the at least one passive front end module 15 and the antenna module 16 is one, at least one passive front end module Each of the passive front end modules 15 of 15 may include: a filter (BPF), a circulator, and a switch; As shown in Figure 6, the first end of the circulator is connected to the output end of a transmitting module 13, the second end is connected to the first end of a filter, the third end is connected to the first end of the switch, and the second end of the switch is The input end of a receiving module 14 is connected, and the second end of the filter is connected to an antenna module 16.

Alternatively, each of the at least one passive front end module 15 may include a filter (BPF) and a circulator; wherein, as shown in FIG. 7, the first end of the circulator is connected to a transmitting module 13. The second end is connected to a receiving module 14, the third end is connected to the first end of the filter, and the second end of the filter is connected to an antenna module 16.

Alternatively, each of the at least one passive front end module 15 may include: a filter and a switch; wherein, as shown in FIG. 8, the first end of the switch is connected to the output end of a transmitting module 13, The second end is connected to the input end of a receiving module 14, the third end is connected to the first end of the filter, and the second end of the filter is connected to an antenna module 16.

When the specific connection mode between the at least one transmitting module 13, the at least one receiving module 14, the at least one passive front end module 15 and the antenna module 16 is mode 2, each passive front end module of the at least one passive front end module 15 15 may include: a filter. Wherein, when the passive front end module 15 is connected to the transmitting module 13, the first end of the filter is connected to the transmitting module 13, and the second end is connected to an antenna module 16. When the passive front end module 15 is connected to the receiving module 14, the first end of the filter is connected to the receiving module 14, and the second end is connected to an antenna module 16.

Exemplarily, as shown in FIG. 9, the transmitting module 13 uses the radio frequency shift to perform beamforming with respect to the first radio frequency signal, the connection mode of the transmitting module 13 and the passive front end module 15 is fully connected, and the passive front end module 15 includes filtering. The transceiver (BPF) and the circulator are taken as an example to show the transceiver provided by the embodiment of the present invention.

The baseband module outputs multiple baseband signals through the digital intermediate frequency module, and for each baseband signal in the multiple baseband signals, in the transmitting module, the baseband signal is converted into a radio frequency signal by the DAC, and then the RF signal is subjected to frequency conversion, amplification, and filtering. After the circuit is processed, it is divided into multiple RF signals by the power splitter. After each RF signal passes through a PS, and other baseband signals other than the baseband signal are DAC, frequency conversion, amplification, The filter circuit, the power divider and the PS processed RF signal are combined by a combiner and input to a power amplifier (PA). The signal output from the power amplifier is input to the antenna module through a circulator and a filter (BPF).

By adjusting the PS group corresponding to each baseband signal (the PS group includes the PS corresponding to the RF signal of the combined RF signal), the transmit beam direction of each baseband signal can be separately adjusted.

The plurality of antenna modules in the antenna array respectively receive the radio frequency signals, and for each of the plurality of antenna modules, the antenna module passes the radio frequency signal through the filter (BPF) and the circulator input receiving module, in the receiving module, the radio frequency The signal is converted to a baseband signal by LNA, frequency conversion, amplification, filter circuit and ADC processing, and then input to the corresponding baseband port.

The adjustment of the receive beam direction can be achieved by differentiating the weighting values when the baseband portion or the digital intermediate frequency portion weights the multiple baseband signals.

Exemplarily, as shown in FIG. 10, the transmitting module 13 uses the radio frequency shift to perform beamforming with respect to the first radio frequency signal, and the connection mode of the transmitting module 13 and the passive front end module 15 is a sub-array connection, and the passive front end module 15 includes A filter (BPF), a switch, and a circulator are taken as an example to illustrate a transceiver provided by an embodiment of the present invention.

The baseband module outputs multiple baseband signals through the digital intermediate frequency module, and for each baseband signal in the multiple baseband signals, in the transmitting module, the baseband signal is converted into a radio frequency signal by the DAC, and then the RF signal is subjected to frequency conversion, amplification, and filtering. After the circuit is processed, it is divided into multiple RF signals by the power divider, and each RF signal is output to the circulator through a PS and a power amplifier (PA). The signal output from the power amplifier is input to the antenna module through a circulator, a switch, and a filter (BPF).

The transmit beam direction of each baseband signal can be adjusted by adjusting the PS.

The plurality of antenna modules in the antenna array respectively receive the radio frequency signals, and for each of the plurality of antenna modules, the antenna module passes the radio frequency signal through the filter (BPF), the switch, and the circulator to the receiving module, in the receiving module. The RF signal is converted into a baseband signal by LNA, frequency conversion, amplification, filtering circuit and ADC processing, and then input to the corresponding baseband port.

Exemplarily, as shown in FIG. 11, the transmitting module 13 uses the radio frequency shift to perform beamforming with respect to the first radio frequency signal, the connection mode of the transmitting module 13 and the passive front end module 15 is fully connected, and the passive front end module 15 includes a switch. And a filter (BPF) as an example, showing a transceiver provided by an embodiment of the present invention. The specific implementation process of the beamforming of the transceiver shown in FIG. 11 is similar to the process of the transceiver shown in FIG. 9. The embodiment of the present invention is not described in detail herein.

In the embodiment of the present invention, in order to quickly obtain the signal drying ratio of each beam pair, as shown in FIG. 12, the transceiver provided by the embodiment of the present invention may further include: at least one reference signal processing module 17 And at least one coupler 18.

A reference signal processing module 17 is connected to a receiving module 14 via a coupler 18, and at least one reference signal processing module 17 is also connected to the digital intermediate frequency module 12; each reference signal processing module 17 of the at least one reference signal module 17 The third RF signal coupled by the receiving module 14 is sampled by the coupler 18, and the sampled signal is output to the digital intermediate frequency module 12.

The coupler 18 is partially coupled with the RF signal, that is, the third RF signal, and is transmitted to the reference signal processing module 17, so that the reference signal processing module 17 processes the third RF signal as a reference signal separately. Then, the signal drying ratio of the beam pair is obtained, that is, the channel information is obtained, and the obtained channel information is fed back to the digital intermediate frequency module 12 to achieve modulation modulation and coding efficiency adjustment.

Each of the at least one reference signal processing module 17 may include a low speed ADC.

Among them, since the reference signal is a narrowband signal, the sampling of the reference signal can be realized by using a low speed ADC.

In a specific implementation, the coupler 18 may be disposed before the LNA included in the receiving module 14, or may be disposed after the circuit for implementing frequency conversion, amplification, and filtering.

Exemplarily, as shown in FIG. 13, on the basis of the transceiver shown in FIG. 10, the coupler is shown as an example after the circuit for implementing frequency conversion, amplification, and filtering. The transceiver provided by the embodiment of the present invention is provided. The specific process of the signal processing is similar to the process in the embodiment shown in FIG. 10, and the embodiments of the present invention are not described in detail herein. The difference is that in the transceiver shown in FIG. 13, each coupler can couple a part of the RF signal from the corresponding receiving module and transmit it to the corresponding low speed ADC, which can use the input RF signal as a reference. The signal is sampled to obtain the signal to dry ratio of the beam pair.

As shown in FIG. 14, the transceiver provided by the embodiment of the present invention is introduced on the basis of the transceiver shown in FIG. 10 and the coupler is disposed before the LNA included in the receiving module 14. The specific process of the signal processing is similar to the process in the embodiment shown in FIG. 10, and the embodiments of the present invention are not described in detail herein. The difference is that in the transceiver shown in FIG. 14, each coupler can couple a part of the RF signal from the corresponding receiving module and transmit it to the corresponding low speed ADC, which can use the input RF signal as a reference. The signal is sampled to obtain the signal to dry ratio of the beam pair.

In addition, the reference signal processing module provided by the embodiment of the present invention can also be used in the transceiver shown in FIG. For the specific setting position of the reference signal processing module, reference may be made to the settings of FIG. 13 and FIG. 14 , which will not be described in detail herein.

It should be noted that the antenna module 16 in the embodiment of the present invention may include one or more antenna units. The number of the antenna units that are included in the antenna module 16 can be set according to the requirements of the actual application scenario, and the embodiment of the present invention is not limited herein.

And, by setting a reference signal processing module in the transceiver, fast sampling of the reference signal is achieved. Since the reference signal processing module samples the reference signal with a low sampling rate and a small amount of data, the computational complexity and processing time are reduced. This uses the reference signal processing module to quickly obtain the signal to interference and noise ratio of each beam pair. In addition, when the base station and the user equipment perform stable communication, since the base station can quickly acquire the signal to interference and noise ratio of the beam pair when communicating with the user equipment, the base station can further quickly and in real time according to the obtained signal drying ratio. The modulation order and coding rate are adjusted to ensure delay and capacity stability for communication with the user equipment.

Another embodiment of the present invention provides a base station. As shown in FIG. 15, the base station may include: the transceiver 21, the antenna module 22, and the main control module 23 as shown in any of FIGS. 5, 9-14.

The antenna module 22 is configured to transmit the first radio frequency signal after the beam shaping of the transceiver 21, receive the second radio frequency signal, and transmit the second radio frequency signal to the transceiver 21.

It should be noted that the specific description of the transceiver in the embodiment of the present invention may be referred to the specific description of the transceiver in another embodiment of the present invention, and the embodiments of the present invention are not described herein again.

The base station provided by the embodiment of the present invention includes the transceiver in the above embodiment, so that the same effect as the above transceiver can be achieved.

Another embodiment of the present invention provides a signal processing method applied to the transceiver shown in any one of Figures 5, 9-14. As shown in Figure 16, the method may include:

301. Generate a first baseband signal, convert the first baseband signal into a first radio frequency signal, perform beamforming on the first radio frequency signal by using the HBF, and transmit the beamformed first radio frequency signal.

302. Receive a second radio frequency signal, convert the second radio frequency signal into a second baseband signal, and use DBF to perform amplitude and phase weighting on the second baseband signal.

Further, the first radio frequency signal is beamformed by using the HBF, and specifically, the method includes: performing radio frequency phase shifting, analog intermediate frequency phase shifting, or local oscillator phase shifting on the first radio frequency signal to perform beamforming.

Further, the method may further include: coupling the third radio frequency signal and sampling the third radio frequency signal.

It should be noted that the specific description of the signal processing method in the embodiment of the present invention may be referred to the specific description of the corresponding content of the transceiver in another embodiment of the present invention, and the embodiments of the present invention are not described herein again.

The signal processing method provided by the embodiment of the present invention is applied to the transceiver in the above embodiment, so that the same effect as the above transceiver can be achieved.

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.

Claims

A transceiver, comprising:

a baseband module, a digital intermediate frequency module, at least one transmitting module, at least one receiving module, and at least one passive front end module;

The baseband module is connected to the at least one transmitting module by the digital intermediate frequency module, and is further connected to the at least one receiving module, and the at least one transmitting module further passes the at least one passive front end module and the antenna module. Connecting, the at least one receiving module is further connected to the antenna module by the at least one passive front end module;

Each of the at least one transmitting module is configured to convert the first baseband signal generated by the baseband module and the digital intermediate frequency module into a first radio frequency signal, and use a hybrid beam for the first radio frequency signal After the shaped HBF is beamformed, the first RF signal shaped by the beam is transmitted through the antenna module connected to the passive front end module through the passive front end module connected to the transmitting module;

Each of the at least one receiving module is configured to receive a second radio frequency signal through a passive front end module connected to the antenna module through an antenna module corresponding to the receiving module, and send the second radio frequency signal Converting the second baseband signal to the digital intermediate frequency module, so that the digital intermediate frequency module performs amplitude and phase weighting on the second baseband signal by using a digital beamforming DBF, and transmits the amplitude-weighted second baseband signal to The baseband module, or, after the digital intermediate frequency module transmits the second baseband signal to the baseband module, the baseband module performs amplitude and phase weighting on the second baseband signal by using the DBF.
The transceiver of claim 1 wherein each of said at least one transmit module comprises: a digital to analog converter DAC, circuitry for implementing frequency conversion, amplification and filtering, a power splitter, Phase shifter PS and power amplifier;

An input end of the DAC is connected to the digital intermediate frequency module, and an output end is connected to an input end of the circuit for implementing frequency conversion, amplification, and filtering, and the output end of the circuit for implementing frequency conversion, amplification, and filtering A connection of an input end of the power splitter, an output end of the power splitter is connected to an input end of the PS, and an output end of the PS is connected to a corresponding passive front end module.
The transceiver according to claim 1 or 2, wherein each of said at least one receiving module comprises: a low noise amplifier LNA, a circuit for implementing frequency conversion, amplification and filtering, and analog to digital conversion ADC

An input end of the LNA is connected to a corresponding passive front end module, and an output end is connected to an input end of the circuit for implementing frequency conversion, amplification, and filtering, and the output end of the circuit for implementing frequency conversion, amplification, and filtering Connected to an input of the ADC, an output of the ADC is coupled to the digital intermediate frequency module.
A transceiver according to any one of claims 1 to 3, characterized in that

Each of the at least one transmitting module is configured to perform beamforming on the first radio frequency signal by using radio frequency phase shifting, analog intermediate frequency phase shifting, or local oscillator phase shifting.
The transceiver according to any one of claims 1 to 4, wherein the transceiver further comprises: at least one reference signal processing module and at least one coupler;

a reference signal processing module is connected to a receiving module through a coupler; the at least one reference signal processing module is further connected to the digital intermediate frequency module;

Each of the at least one reference signal module is configured to sample the third RF signal coupled by the coupler in the receiver module, and output the sampled signal to the digital IF module.
The transceiver of claim 5 wherein each of said at least one reference signal processing module comprises: a low speed ADC.
The transceiver of any of claims 1-6, wherein each of the at least one passive front end module comprises: a filter, a circulator, and a switch;

The first end of the circulator is connected to a transmitting module, the second end is connected to the first end of the filter, the third end is connected to the first end of the switch, and the second end of the switch is The receiving module is connected, and the second end of the filter is connected to an antenna module.
The transceiver according to any one of claims 1 to 6, wherein each of the at least one passive front end module comprises: a filter and a circulator;

The first end of the circulator is connected to a transmitting module, the second end is connected to a receiving module, the third end is connected to the first end of the filter, and the second end of the filter is connected to an antenna module. .
The transceiver of any of claims 1-6, wherein each of the at least one passive front end module comprises: a filter and a switch;

The first end of the switch is connected to a transmitting module, the second end is connected to a receiving module, the third end is connected to the first end of the filter, and the second end of the filter is connected to an antenna module.
A base station, comprising:

The transceiver, antenna module and main control module according to any one of claims 1-9;

The antenna module is configured to transmit a first radio frequency signal after the beam shaping of the transceiver, receive a second radio frequency signal, and transmit the second radio frequency signal to the transceiver;

The main control module is configured to configure and set the transceiver, and provide a clock for the transceiver.
A signal processing method for a transceiver according to any one of claims 1-9, characterized in that the method comprises:

Generating a first baseband signal, converting the first baseband signal into a first radio frequency signal, performing beamforming on the first radio frequency signal by using a hybrid beamforming HBF, and transmitting a beamformed first radio frequency signal;

Receiving a second radio frequency signal, converting the second radio frequency signal into a second baseband signal, and performing amplitude and phase weighting on the second baseband signal by using a digital beamforming DBF.