KR102656996B1 - Multi-channel phase synchronization device, method and base station in base station - Google Patents

Abstract

The present disclosure relates to a multi-channel phase synchronization device for a base station, a method, and a base station. The multi-channel phase synchronization device for a base station according to the present disclosure includes a plurality of channels, a clock circuit, and a calibration circuit. A local oscillation circuit that generates a local oscillation signal is installed on each channel, and a clock circuit is connected to each channel to provide a clock signal to each channel. The correction circuit is configured to obtain a phase difference between each channel and a reference channel and perform phase correction for each channel based on the phase difference. In the multi-channel phase synchronization device of a base station according to the present disclosure, a local oscillator circuit is separately installed in each channel, and all channels jointly use one synchronization clock.

Description

Multi-channel phase synchronization device, method and base station in base station

The present disclosure relates to the field of communication technology, and in particular to a multi-channel phase synchronization apparatus, method, and base station of a base station.

Latest communication technologies place higher demands on signal phase control, and Massive MIMO (Multiple-Input Multiple-Output) and beamforming technologies require precise control of the phase and amplitude of array units.

In order to maintain phase synchronization between channels, most base stations in related technologies use a common local oscillation method. However, as the number of system array units continues to increase and the number of channels increases, not only is it difficult to design local oscillation distribution and wiring among common local oscillation methods, but it also occupies PCB area, increasing the overall volume of the device.

The purpose of the present disclosure is to provide a multi-channel phase synchronization apparatus, method, and base station for a base station that solves the multi-channel phase synchronization problem of the base station.

A multi-channel phase synchronization device for a base station according to an embodiment of the present disclosure includes a plurality of channels in which a local oscillation circuit for generating a local oscillation signal is installed for each channel; a clock circuit connected to each said channel to provide a clock signal to each said channel; It includes a calibration circuit configured to obtain a phase difference between each channel and a reference channel and perform phase correction for each channel based on the phase difference.

The multi-channel phase synchronization method of the base station according to an embodiment of the present disclosure performs multi-channel phase synchronization using the multi-channel phase synchronization device of the base station, and the method obtains the phase difference between each channel of the base station and the reference channel. steps; and performing phase correction for each channel based on the phase difference.

The base station according to an embodiment of the present disclosure includes a multi-channel phase synchronization device of the base station as a multi-channel phase synchronization device.

The base station according to an embodiment of the present disclosure has a separate local oscillator circuit installed for each channel, and all channels commonly use one clock.

In the multi-channel phase synchronization device of a base station according to an embodiment of the present disclosure, a local oscillator circuit is installed separately for each channel, but all channels commonly use one synchronization clock. Accordingly, the phase of each channel can be synchronized to some extent through a common clock reference. Accordingly, system wiring can be simpler and more flexible. In addition, since the frequency of the clock signal is low and the insertion loss is low, there is no need to install an amplifier and the effect of spurs does not need to be excessively considered, effectively simplifying the overall structure of the base station and enabling multiple channels of the base station. The problem of phase synchronization was solved. Meanwhile, since phase correction is performed for each channel in real time, it can be ensured that phase synchronization performance is not affected even after hardware simplification.

In the multi-channel phase synchronization method of a base station according to the present disclosure, a local oscillator circuit is installed separately for each channel, but all channels commonly use one synchronization clock. Accordingly, the phase of each channel can be synchronized to some extent through a common clock reference. As a result, system wiring can become simpler and more flexible. In addition, since the frequency of the clock signal is low and the insertion loss is low, there is no need to install an amplifier and the effect of spurs does not need to be excessively considered, effectively simplifying the overall structure of the base station and enabling multiple channels of the base station. The problem of phase synchronization was solved. Meanwhile, since phase correction is performed for each channel in real time, it can be ensured that phase synchronization performance is not affected even after hardware simplification.

Figure 1 is a system schematic diagram of a common local oscillation method among related technologies.
Figure 2 is a system phase difference analysis diagram of a common local oscillation method among related technologies.
Figure 3 is a schematic diagram of a common clock system according to an embodiment of the present disclosure.
Figure 4 is a system phase difference analysis diagram of the common clock method according to an embodiment of the present disclosure.
Figure 5 is a flow chart of a multi-channel phase synchronization method of a base station according to an embodiment of the present disclosure.
Figure 6 is a flow chart of a method for obtaining a phase difference between each channel of a base station and a reference channel according to an embodiment of the present disclosure.
Figure 7 is a flow chart of a multi-channel phase synchronization method of a base station according to an embodiment of the present disclosure.
Figure 8 is a flow chart of a multi-channel phase synchronization method of a base station according to an embodiment of the present disclosure.
Figure 9 is a schematic diagram of a reference system example in the related art.
Figure 10 is a schematic diagram showing an example of a common clock reference according to an embodiment of the present disclosure.

In order to explain in more detail the technical means and effects used to implement the purpose of the present disclosure, the present disclosure will be described in detail below by combining the attached drawings and preferred embodiments.

In related technology, in order to maintain phase synchronization between each channel of the base station, most base stations use the common local oscillation method shown in FIG. 1. The common local oscillation type base station system consists of the same clock generator 122, PLL (local oscillator) 101, local oscillation divider 102, and amplifier circuits 103, 109, and 114.

The biggest feature of the common local oscillation method is that the local oscillation signals of all transmitting and receiving channels of the entire device are all received from one local oscillator 101. This ensures that the phase arriving at the mixer of each channel is the same, and the base As long as the band signal phase matches, it can be guaranteed that N channels (TX1 to N) transmit the same phase.

Common local oscillation methods require calibration. This is because a certain phase difference occurs due to differences in the wiring and connection head of the printed circuit board (PCB) of each channel of the local oscillation distributor, so calibration is performed at the baseband. This is because compensation must be processed. Since the phase difference of the common local oscillation method has little change over time, correction of the common local oscillation is very simple, and only needs to be performed once a few hours after initializing the calibration.

As shown in Figure 1, when using a common local oscillator method, the same PLL (local oscillator) must provide a local oscillation signal to N transmitting and receiving links. In this case, when the local oscillating signal is distributed and arrives at each link, the level ( Not only is the level lowered, but the local oscillation signal frequency is high and PCB consumption is large, so an amplification circuit must be expanded. As a result, additional chip area must be added to the system, and power consumption and costs also increase. At the same time, since the local oscillation signal frequency is relatively high, spurs easily occur in the system due to the distribution wiring of the local oscillation, resulting in instability risk. As the number of system array units continues to increase and the number of channels increases, the contradiction between local oscillation distribution and wiring and area in a full device of 64 channels or 128 channels can hardly be resolved.

As shown in FIG. 3, the multi-channel phase synchronization device of the base station according to an embodiment of the present disclosure includes a plurality of channels, a clock circuit, and a calibration circuit.

Specifically, as shown in FIG. 3, the base station includes a plurality of channels, and a local oscillator circuit that generates a local oscillation signal is installed in each channel. A clock circuit is connected to each channel to provide a clock signal to each channel. The correction circuit is configured to obtain a phase difference between each channel and a reference channel and perform phase correction for each channel based on the phase difference.

In the multi-channel phase synchronization device of a base station according to an embodiment of the present disclosure, a local oscillator circuit is installed separately for each channel, but all channels commonly use one synchronization clock. Accordingly, the phase of each channel can be synchronized to some extent through a common clock reference. As a result, system wiring can become simpler and more flexible. In addition, since the frequency of the clock signal is low and the insertion loss is low, there is no need to install an amplifier and the effect of spurs does not need to be excessively considered, effectively simplifying the overall structure of the base station and enabling multiple channels of the base station. The problem of phase synchronization was solved. Meanwhile, since phase correction is performed for each channel in real time, it can be ensured that phase synchronization performance is not affected even after hardware simplification.

According to some embodiments of the present disclosure, the calibration circuit includes an acquisition module and a calibration module.

Here, the acquisition module is configured to acquire the phase difference between each channel of the base station and the reference channel.

The calibration module is configured to perform phase calibration for each channel by phase difference.

Note that, in the present disclosure, a local oscillation circuit is installed separately in each channel, and all channels jointly use one synchronization clock. This disclosure defines this as a common clock reference method.

As shown in Figure 6, according to some embodiments of the present disclosure, the acquisition module:

transmit a calibration signal to each channel;

It is configured to select one of a plurality of channels to use as a reference channel and calculate the phase difference between the remaining channels and the reference channel using a calibration signal.

Combining Figure 3, the digital baseband processing unit 208 can send one special calibration signal to each channel, which after passing through each channel is sent to the digital baseband processing unit (226) in the calibration channel 226. 208). One of the plurality of channels is selected and used as a reference channel, and the phase difference between the remaining channels and the reference channel is calculated based on the reference channel.

Accordingly, the digital baseband processing unit 208 can perform phase compensation for each channel based on the phase difference so that the phases of all channels are aligned with the reference channel.

In some embodiments of the present disclosure, the phase difference may include a local oscillation phase difference and a wiring phase difference for each channel.

Here, the local oscillation phase difference may include a voltage-controlled oscillator phase difference, a frequency divider phase difference, and a phase detector phase difference, and the wiring phase difference may include a local oscillation wiring phase difference and a clock wiring phase difference.

As shown in Figure 4, the local oscillator (PLL) can generate phase noise, which is present in the voltage controlled oscillator (VCO), frequency divider, and phase detector. These noise components cause the phase of the local oscillator (PLL) to deviate from the phase of the reference clock. Therefore, there is a phase variation (Δpll) between the phases output by different PLLs. The wiring between the clock circuit (CLK) and the PLL can generate Δclkpath, and the local oscillator circuit wiring can generate ΔLO_path. That is, in the common reference method used in this disclosure, the phase variation includes Δpll, Δclkpath, and ΔLO_path. Here, Δclkpath and ΔLO_path both belong to the phase difference caused by wiring, and the experiment showed that phase difference can be caused by the length, thickness, material, and corner of the PCB wiring, and can also be caused by the adapter, length, and material of the coaxial cable. This can be known through .

By calculating the phase difference between each channel and the reference channel and performing phase compensation for each channel based on the phase difference, the phases of all channels can be aligned with the reference channel.

In some embodiments of the present disclosure, the device:

determine whether predetermined phase correction conditions are satisfied;

It further includes a determination module that triggers the acquisition module to obtain the phase difference between each channel and the reference channel when the predetermined phase correction condition is satisfied.

According to some embodiments of the present disclosure, the predetermined phase correction condition includes: the change in system temperature of the base station exceeds the predetermined temperature; and/or reaching a scheduled calibration time.

In other words, if the change in system temperature of the base station exceeds the predetermined temperature, phase correction compensation is performed for each channel. Alternatively, when the time interval from the immediately previous calibration compensation reaches the scheduled calibration time, phase calibration compensation is performed for each channel. Alternatively, if the change in system temperature of the base station exceeds the predetermined temperature, but the time interval from the immediately previous calibration compensation reaches the predetermined calibration time, phase calibration compensation is performed for each channel.

Note that, as previously explained, in the common clock reference scheme used in this disclosure, the phase variations include Δpll, Δclkpath, and ΔLO_path. Although these phase differences are constant, when the temperature changes, the phase difference changes, so the entire device of the common reference method is calibrated and the phase of each channel is already aligned, but when the temperature changes significantly, the phase difference changes due to Δclkpath and ΔLO_path. becomes excessively large, causing the phase difference between each channel to deviate from the corresponding demand and affect traffic. Therefore, in the overall device design, the PCB wiring must be controlled so that Δclkpath and ΔLO_path maintain the smallest possible values, but due to the complexity of the system, Δclkpath and ΔLO_path cannot be completely resolved, so calibration compensation must be performed. Since the phase difference (Δpll) generated by Pll also changes depending on time and temperature, calibration compensation must be performed similarly.

According to some embodiments of the present disclosure, the length of the local oscillation wiring of the local oscillation circuit on each channel is the same. By making the length of the local oscillation wiring of the local oscillation circuit on each channel the same, the phase variation (Δpll) that exists in the phase output from different PLLs of each channel can be reduced, which is advantageous in improving the phase consistency of each channel. can understand.

In some embodiments of the present disclosure, the length of the clock wires connected to each channel in the clock circuit is the same. Since the length of the clock wiring connected to each channel in the clock circuit is installed the same, the clock wiring phase difference (Δclkpath) caused by the wiring between the clock circuit (CLK) and the PLL can be reduced, thereby ensuring phase consistency of each channel. It is understandable that it is advantageous to improve .

As shown in FIGS. 3 and 5, according to the multi-channel phase synchronization method of the base station of the present disclosure, the method performs multi-channel phase synchronization using the multi-channel phase synchronization device of the base station, and the method includes:

S101: Obtaining the phase difference between each channel of the base station and the reference channel;

S102: performing phase correction for each channel by phase difference.

In the multi-channel phase synchronization method of a base station according to the present disclosure, a local oscillator circuit is installed separately for each channel, but all channels commonly use one synchronization clock. Accordingly, the phase of each channel can be synchronized to some extent through a common clock reference. As a result, system wiring can become simpler and more flexible. In addition, since the frequency of the clock signal is low and the insertion loss is low, there is no need to install an amplifier and the effect of spurs does not need to be excessively considered, effectively simplifying the overall structure of the base station and enabling multiple channels of the base station. The problem of phase synchronization was solved. Meanwhile, since phase correction is performed for each channel in real time, it can be ensured that phase synchronization performance is not affected even after hardware simplification.

As shown in FIG. 6, according to some embodiments of the present disclosure, the step of acquiring the phase difference between each channel of the base station and the reference channel is:

S201: Transmitting a calibration signal to each channel;

S202: selecting one of the plurality of channels to use as a reference channel and calculating the phase difference between the remaining channels and the reference channel using a calibration signal,

Combining Figure 3, the digital baseband processing unit 208 can send one special calibration signal to each channel, which after passing through each channel is sent to the digital baseband processing unit (226) in the calibration channel 226. 208) and return

Combining Figure 3, one of the plurality of channels is selected and used as a reference channel, and the phase difference between the remaining channels and the reference channel is calculated based on the reference channel.

Accordingly, the digital baseband processing unit 208 performs phase compensation for each channel based on the phase difference so that the phases of all channels are aligned with the reference channel.

In some embodiments of the present disclosure, the phase difference may include a local oscillation phase difference and a wiring phase difference for each channel.

Here, the local oscillation phase difference may include a voltage-controlled oscillator phase difference, a frequency divider phase difference, and a phase detector phase difference, and the wiring phase difference may include a local oscillation wiring phase difference and a clock wiring phase difference.

Note that, as shown in FIG. 2, in the common local oscillation method used in related technologies, phase variation (ΔLO_path) may occur due to wiring differences from the PLL (local oscillator) to the mixer. Accordingly, only the ΔLO_path caused by the local oscillation circuit wiring exists in the phase variation of the common local oscillation method. This is because the factors affecting the phase in the existing method have been reduced by the complex local oscillation method.

In the common clock scheme according to the present disclosure, as shown in FIG. 4, the local oscillator (PLL) may generate phase noise, which is present in the voltage controlled oscillator (VCO), frequency divider, and phase detector. do. These noise components cause the phase of the local oscillator (PLL) to deviate from the phase of the reference clock. Therefore, there is a phase variation (Δpll) in different PLL output phases. The wiring between the clock circuit (CLK) and the PLL can generate Δclkpath, and the local oscillator circuit wiring can generate ΔLO_path. That is, in the common reference method used in this disclosure, the phase variation includes Δpll, Δclkpath, and ΔLO_path. Here, Δclkpath and ΔLO_path both belong to the phase difference caused by wiring, and experiments have shown that phase difference can be caused by the length, thickness, material, and corner of the PCB wiring, and can also be caused by the adapter, length, and material of the coaxial cable. You can find out through it.

By calculating the phase difference between each channel and the reference channel and performing phase compensation for each channel based on the phase difference, the phases of all channels can be aligned with the reference channel.

As shown in Figure 7, in some embodiments of the present disclosure, the method includes:

S301: determining whether predetermined phase correction conditions are satisfied;

S302: If the predetermined phase correction condition is satisfied, obtaining a phase difference between each channel of the base station and the reference channel.

According to some embodiments of the present disclosure, the predetermined phase correction conditions include: the system temperature change of the base station exceeds the predetermined temperature; and/or reaching a scheduled calibration time.

In other words, if the change in system temperature of the base station exceeds the predetermined temperature, phase correction compensation is performed for each channel. Alternatively, when the time interval from the immediately previous calibration compensation reaches the scheduled calibration time, phase calibration compensation is performed for each channel. Alternatively, if the change in system temperature of the base station exceeds the predetermined temperature, but the time interval from the immediately previous calibration compensation reaches the predetermined calibration time, phase calibration compensation is performed for each channel.

Note that, as previously explained, in the common clock reference scheme used in this disclosure, the phase variations include Δpll, Δclkpath, and ΔLO_path. Although these phase differences are constant, when the temperature changes, the phase difference changes, so the entire device of the common reference method is calibrated and the phase of each channel is already aligned, but when the temperature changes significantly, the phase difference changes due to Δclkpath and ΔLO_path. becomes excessively large, causing the phase difference between each channel to deviate from the corresponding demand and affect traffic. Therefore, in the overall device design, the PCB wiring must be controlled so that Δclkpath and ΔLO_path maintain the smallest possible values, but due to the complexity of the system, Δclkpath and ΔLO_path cannot be completely resolved, so calibration compensation must be performed. Since the phase difference (Δpll) generated by Pll also changes depending on time and temperature, calibration compensation must be performed similarly.

As shown in Figure 8, the factors that trigger calibration compensation for each channel are time and temperature. When the temperature change of the entire device exceeds a certain range or passes a certain time, phase correction compensation begins to be performed. Depending on the phase error requirement of 5° or less presented by the operator, the temperature change of the entire device exceeding 10°C and the time change of 30 minutes can be set as calibration trigger conditions. As shown in Figure 8, first connect power to the system and then initialize calibration. During the operation of the base station, the system CPU can read back the temperature of the entire device, and if the temperature change exceeds 10℃, phase correction is performed once. At the same time, 30 minutes after the previous phase correction, the system performs phase correction once. Accordingly, it is possible to ensure that services such as traffic of the common standard base station system are performed normally.

Combining Figures 3 and 4, the signal is coupled from the antenna port, enters the N-way combiner, passes through the calibration channel, and then enters the baseband, and the digital baseband processing unit 208 combines the N channel and the reference channel. Calculate the phase difference (ΔPhaseN) and perform phase compensation (ΔCalN) on the baseband signal. Through this, the phase difference between the N channel and the reference channel after compensation becomes 0. here,

ΔPhaseN=Δpll+Δclkpath+ΔLO_path;

ΔPhaseN+ΔCalN=0.

The common clock reference method of the present disclosure can satisfy the phase requirements of massive and beamforming among 5G base stations, and at the same time, layer-out is more flexible, size is smaller, and cost and power consumption can be lowered, enabling multi-channel (64 or 128) can be used for beamforming.

Figure 10 shows a circuit example of the transmission and reception system of the entire device to which the common clock reference method is applied. At the same time, Figure 9 shows a circuit example of the transmission and reception system of the entire device to which the N-channel common local oscillation method (related technology method) is applied as a comparative example. In Figure 10, the system uses a 2T2R transmit/receive integrated chip and jointly uses N transmit channels and N receive channels. One clock chip provides a reference to N/2 integrated chips, and two channels of each integrated chip are common local oscillations. N receiving channels select one channel as the transmit phase calibration channel (this can reduce the number of analog channels), and N channels enter the calibration channel through a combiner (N channels are calibrated simultaneously). (This can improve calibration efficiency) This completes the transmission calibration. One transmission channel is selected as the reception phase correction channel, and the calibration channel is assigned to each reception channel through a combiner to complete the calibration of the reception channel. In the single board wiring of the entire device, the clock wiring, RF wiring, and cable length should be the same as possible.

As can be seen by comparing the examples of FIGS. 9 and 10, the common reference system used in the present disclosure not only has less risk and fewer spurs, but is also more efficient than the common local oscillation system used in related technologies. The number of chips, cost, power consumption, and area are all relatively small. Additionally, at least one PLL chip, N amplifiers, and N/4 power dividers can be saved. Meanwhile, waste on the PLL inside the transceiver and RF sampling chip can be reduced.

The common reference method used in this application and the common local oscillation method used in related technologies each have different requirements for wiring. The common reference method increases the difficulty of clock wiring, while the common local oscillation method increases the complexity of local oscillation wiring. As a result, the frequency of the local oscillation signal is higher than that of the clock signal, so the common reference method has lower wiring requirements.

As shown in FIG. 3, the base station according to an embodiment of the present disclosure includes a multi-channel phase synchronization device of the base station as a multi-channel phase synchronization device.

Here, a local oscillation circuit that generates a local oscillation signal is installed in each channel. A clock circuit is connected to each channel to provide a clock signal to each channel. The correction circuit obtains the phase difference between each channel and the reference channel and performs phase correction for each channel based on the phase difference.

Specifically, as shown in FIG. 3, the base station of the common clock reference method used in this disclosure consists of three parts: a clock generation and distribution circuit, a transmission and reception circuit, and system phase correction.

Here, as shown in FIG. 3, the clock generation and distribution circuit mainly includes a clock generator 224, a clock distributor 225, and wiring lines 204, 211, and 219 from the clock chip to each channel. The circuit is mainly responsible for recovering the clock, filtering spurs, and then distributing them to each channel. If the phase delays on the wires 204, 211, and 219 are consistent, the consistency of the clock phases arriving at the local oscillator of each channel can be guaranteed.

The transmit/receive circuit includes frequency synthesizers (201, 209, 216) that transmit and receive each channel, local oscillator wiring (205, 212, 220), and other devices on the RF transmit/receive link. Frequency synthesizers 1 to 3 generate a local oscillation (LO) signal based on the clock signal, mix the baseband signal and frequency, and transmit it through the RF link. In an ideal state, the phase of the local oscillation signal matches the reference phase, and the phase delays of wiring and other devices match, so the phases arriving at each channel of the antenna also match.

In the base station according to an embodiment of the present disclosure, the local oscillator circuit of each channel is relatively independent, and all channels commonly use one synchronization clock. Accordingly, system wiring can be simpler and more flexible. Since the frequency of the clock signal is low and the insertion loss is small, there is no need to install an amplifier and the effect of spurs does not have to be excessively considered, solving the multi-channel phase synchronization problem of the base station. Among 5G base stations, massive and beamforming can meet the requirements for phase, and can be used for beamforming of multiple channels (64 or 128).

Through the description of the specific details for carrying out the invention, you will gain a deeper and more detailed understanding of the technical means and effects used for the problem to be solved in the present disclosure. However, the attached drawings are provided for reference and explanation only and are not intended to limit the present disclosure.

Claims (16)

A plurality of channels in which a local oscillation circuit for generating a local oscillation signal by a clock signal is installed in each channel;
a clock circuit connected to each channel to provide the clock signal to each channel;
A correction circuit configured to obtain a phase difference between each channel and a reference channel and perform phase correction for each channel using the phase difference,
The correction circuit is,
A calibration signal is transmitted to each channel, one of the plurality of channels is selected and used as a reference channel, and the phase difference between the remaining channels and the reference channel is calculated using the calibration signal, and the calibration signal is configured to an acquisition module that passes through each channel and then returns from the calibration channel to the calibration circuit; and
A multi-channel phase synchronization device of a base station comprising: a calibration module configured to perform phase calibration for each channel based on the phase difference. In claim 1,
The phase difference includes a local oscillation phase difference and a wiring phase difference for each channel. In claim 2,
The local oscillation phase difference includes a voltage controlled oscillator phase difference, a frequency divider phase difference, and a phase detector phase difference,
The multi-channel phase synchronization device of a base station wherein the wiring phase difference includes a local oscillation wiring phase difference and a clock wiring phase difference. In claim 1,
The device is,
A base station further comprising a determination module configured to determine whether a predetermined phase correction condition is satisfied, and when the predetermined phase correction condition is satisfied, trigger the acquisition module to obtain a phase difference between each channel of the base station and a reference channel. of multi-channel phase synchronizer. In claim 4,
The scheduled phase correction conditions are,
a change in system temperature of the base station exceeds a predetermined temperature; and/or, a multi-channel phase synchronization device in a base station, including reaching a scheduled calibration time. In claim 1,
A multi-channel phase synchronization device of a base station where the local oscillation wiring length of the local oscillator circuit on each channel is the same. In claim 1,
A multi-channel phase synchronization device for a base station, wherein the clock wires connected from the clock circuit to each channel have the same length. Multi-channel phase synchronization is performed using the multi-channel phase synchronization device of the base station according to any one of claims 1 to 7,
transmitting a calibration signal to each of the channels, wherein the calibration signal passes through each channel and then returns from the calibration channel to the calibration circuit;
selecting one of the plurality of channels to use as a reference channel and calculating a phase difference between the remaining channels and the reference channel using the calibration signal; and
A multi-channel phase synchronization method of a base station comprising: performing phase correction for each channel based on the phase difference. In claim 8,
The multi-channel phase synchronization method of a base station wherein the phase difference includes a local oscillation phase difference and a wiring phase difference for each channel. In claim 9,
The local oscillation phase difference includes a voltage-controlled oscillator phase difference, a frequency divider phase difference, and a phase detector phase difference,
The multi-channel phase synchronization method of a base station wherein the wiring phase difference includes a local oscillation wiring phase difference and a clock wiring phase difference. In claim 8,
The above method is,
determining whether predetermined phase correction conditions are satisfied;
If the predetermined phase correction condition is satisfied, obtaining a phase difference between each channel of the base station and the reference channel. In claim 11,
The scheduled phase correction conditions are,
a change in system temperature of the base station exceeds a predetermined temperature; and/or, a method for multi-channel phase synchronization of a base station, including reaching a scheduled calibration time. A base station comprising the multi-channel phase synchronization device of the base station according to any one of claims 1 to 7 as a multi-channel phase synchronization device. delete delete delete