CN111464280A - Multi-channel signal processing system, method and device - Google Patents
Multi-channel signal processing system, method and device Download PDFInfo
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- CN111464280A CN111464280A CN201910060173.5A CN201910060173A CN111464280A CN 111464280 A CN111464280 A CN 111464280A CN 201910060173 A CN201910060173 A CN 201910060173A CN 111464280 A CN111464280 A CN 111464280A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/50—Circuits using different frequencies for the two directions of communication
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Abstract
The embodiment of the invention discloses a multi-channel signal processing system, a method and a device, wherein the system comprises: a power divider and a circulator; the power divider is respectively connected with the far-end radio frequency module and the circulator and is used for carrying out shunting processing on the uplink signals or carrying out combining processing on the multiple paths of downlink signals; the circulator is respectively connected with the first signal source and the frequency spectrograph and is used for separating the received multipath signals into uplink signals and downlink signals, and respectively sending the separated uplink signals to the power divider and sending the downlink signals to the frequency spectrograph according to the transmission direction of the signals. The simultaneous measurement of multiple channels of signals of the far-end radio frequency module is realized by simultaneously collecting the radio frequency signals of multiple channels, the measurement time of multi-channel equipment is reduced by times, and the efficiency is improved; the passive device is used for replacing an active device in the prior art, so that the cost is saved; due to the use of the passive device, the environment is low in temperature influence, and the environment reliability is enhanced; meanwhile, the environment is simple, the time period of development driving is saved, and the method is easy to use.
Description
Technical Field
The embodiment of the invention relates to the technical field of communication, in particular to a multi-channel signal processing system, a method and a device.
Background
The existing multipath signal processing methods mainly include the following two methods:
the first is to use a matrix switch and a multi-channel spectrometer, a radio frequency switch is used to connect each channel of a remote radio frequency module and an instrument, the channels and the up and down are switched by a switch, and the spectrometer adopts a single-channel spectrometer. If multi-channel signals need to be acquired simultaneously, the spectrometer needs to have functions of multi-channel input and multi-channel analysis, and the multi-channel switch is switched to connect the multi-channel input of the spectrometer with different equipment channels, so that channel signals equal to the channel of the spectrometer can be acquired simultaneously, and a specific system structure schematic diagram is shown in fig. 1, wherein sg (signal generator) is a signal source, sa (spectrum analyzer) is a spectrometer, and rru (radio Remote unit) is a Remote radio frequency module. The approach shown in fig. 1 does not require combining.
The second is that the multi-channel radio frequency signal combined by the power divider is resolved by time division, each channel of the far-end radio frequency module enters the frequency spectrograph through the power divider, and in order to perform single-path resolution on the combined signal, the combined signal is split by only signaling and data capturing of one channel in the same time slot.
However, the above multi-channel signal processing method uses a matrix switch to switch channels, so that many active devices are used and the cost is high; the switching speed of the matrix switch is slow, and if a multi-channel frequency spectrograph is not used, the simultaneous testing of multiple channels cannot be realized, and the cost of the multi-channel frequency spectrograph is increased; the matrix switch comprises a control circuit, so that the environment is complex, and the development period is long; and the time division is utilized to distinguish the signals of each channel, so that the single-channel test is still performed essentially, and the efficiency is low.
Disclosure of Invention
Because the existing methods have the above problems, embodiments of the present invention provide a multi-channel signal processing system, method and apparatus.
In a first aspect, an embodiment of the present invention provides a multi-channel signal processing system, including: a power divider and a circulator;
the first end of the power divider is connected with the far-end radio frequency module, the second end of the power divider is connected with the first end of the circulator, and the power divider is used for carrying out shunting processing on an uplink signal sent by the circulator in an uplink or carrying out combining processing on a plurality of paths of downlink signals sent by the far-end radio frequency module in a downlink;
the second end of the circulator is connected with the first signal source, the third end of the circulator is connected with the frequency spectrograph, and the circulator is used for separating the received multipath signals into uplink signals and downlink signals, and respectively sending the separated uplink signals to the power divider and the downlink signals to the frequency spectrograph according to the transmission direction of the signals.
Optionally, comprising:
if the number of the power dividers is more than or equal to 2, the multi-path signal processing system also comprises two-stage power dividers;
the secondary power divider is arranged between the power dividers and the circulator and used for combining the multi-path signals output by the power dividers.
Optionally, the first end of the power divider is connected to the far-end rf module, and specifically includes:
each channel of the far-end radio frequency module is sequentially connected with a port of each power divider, and the specific connection mode comprises the following steps:
an nth channel of the far-end radio frequency module is connected with an nth port of an Mth power divider, an Nth-1 th channel is connected with an nth-1 th port of the Mth power divider, an Nth-2 th channel is connected with an nth-2 th port of the Mth power divider, and so on, and the 1 st channel is connected with a 1 st port of the 1 st power divider;
the output port of the Mth power divider is connected with the mth port of the secondary power divider, the output port of the M-1 th power divider is connected with the M-1 th port of the secondary power divider, and so on, the output port of the 1 st power divider is connected with the 1 st port of the secondary power divider;
wherein N, M, N and M are positive integers, M × N is more than or equal to N, and M is less than or equal to M.
Optionally, the method further comprises: an attenuator;
the attenuator is arranged between the frequency spectrograph and the circulator and is used for attenuating the signal output by the circulator to the frequency spectrograph.
Optionally, the method further comprises: a load;
the load is connected with redundant ports of the power divider;
the redundant port is a port which is not connected with the channel of the far-end radio frequency module in the power divider.
Optionally, a third end of the power divider is connected to a second signal source, and is configured to receive a downlink calibration signal sent by the second signal source, combine the calibration signal, send the combined calibration signal to the circulator, and send the downlink calibration signal to the frequency spectrograph through the circulator, so as to obtain difference compensation of each channel of the remote radio frequency module.
In a second aspect, an embodiment of the present invention provides a method for processing multiple downlink signals, including:
grouping radio frequency channels of the remote radio frequency modules, and receiving downlink signals sent by each channel of each group of the remote radio frequency modules;
combining the received downlink signals of each channel to obtain combined downlink signals;
sending the combined downlink signal to the circulator, sending the combined downlink signal to the frequency spectrograph through the circulator, and acquiring downlink radio frequency signal values of each channel of the far-end radio frequency module, which are obtained by the frequency spectrograph;
and only one group of channels sends downlink signals to the power divider at the same time.
Optionally, the method further comprises:
receiving a downlink calibration signal sent by the second signal source, combining the downlink calibration signal, and sending the combined downlink calibration signal to the circulator, where the combined downlink calibration signal is sent to the frequency spectrograph through the circulator, and a downlink difference compensation value of each channel of the far-end radio frequency module obtained by the frequency spectrograph is obtained;
and obtaining the actual downlink signal value of each channel of the remote radio frequency module according to the downlink difference compensation value of each channel and the downlink radio frequency signal value of each channel.
In a third aspect, an embodiment of the present invention provides a method for processing multiple uplink signals, including:
receiving an uplink signal sent by the first signal source through the circulator, and performing shunting processing on the received uplink signal to obtain a shunted uplink signal;
sending the branched uplink signal to the frequency spectrograph, and obtaining an uplink difference compensation value of each channel of the remote radio frequency module, which is obtained by the frequency spectrograph;
and obtaining the actual uplink signal value of each channel of the remote radio frequency module according to the received uplink radio frequency signal value of each channel and the uplink difference compensation value of each channel.
In a fourth aspect, an embodiment of the present invention provides a multi-channel downlink signal processing apparatus, including:
the channel grouping module is used for grouping the radio frequency channels of the remote radio frequency module and receiving downlink signals sent by each channel of each group of the remote radio frequency module;
the combining processing module is used for combining the received downlink signals of each channel to obtain combined downlink signals;
a downlink signal value obtaining module, configured to send the combined downlink signal to the circulator, send the combined downlink signal to the frequency spectrograph through the circulator, and obtain a downlink radio frequency signal value of each channel of the far-end radio frequency module, where the downlink radio frequency signal value is obtained by the frequency spectrograph;
and only one group of channels sends downlink signals to the power divider at the same time.
In a fifth aspect, an embodiment of the present invention provides a multi-channel uplink signal processing apparatus, including:
the signal receiving module is used for receiving the uplink signal sent by the first signal source through the circulator and carrying out shunting processing on the received uplink signal to obtain a shunted uplink signal;
the difference compensation module is used for sending the branched uplink signals to the frequency spectrograph and acquiring uplink difference compensation values of each channel of the remote radio frequency module, which are obtained by the frequency spectrograph;
and the uplink signal value acquisition module is used for obtaining the actual uplink signal value of each channel of the remote radio frequency module according to the received uplink radio frequency signal value of each channel and the uplink difference compensation value of each channel.
In a sixth aspect, an embodiment of the present invention further provides an electronic device, including:
at least one processor; and
at least one memory communicatively coupled to the processor, wherein:
the memory stores program instructions executable by the processor, which when called by the processor are capable of performing the above-described methods.
In a seventh aspect, an embodiment of the present invention further provides a non-transitory computer-readable storage medium, which stores a computer program, and the computer program causes the computer to execute the above method.
According to the technical scheme, the embodiment of the invention realizes the simultaneous measurement of the multi-channel signals of the far-end radio frequency module by simultaneously collecting the radio frequency signals of a plurality of channels, reduces the measurement time of multi-channel equipment by times and improves the efficiency; the passive device is used for replacing an active device in the prior art, so that the cost is saved; due to the use of the passive device, the environment is low in temperature influence, and the environment reliability is enhanced; meanwhile, the environment is simple, the time period of development driving is saved, and the method is easy to use.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic flow chart of a multipath signal processing method provided in the prior art;
fig. 2 is a schematic structural diagram of a multi-channel signal processing system according to an embodiment of the present invention;
fig. 3 is a schematic flowchart of a method for downlink signal processing based on a multi-channel signal processing system according to an embodiment of the present invention;
fig. 4 is a schematic flow chart of downlink signal combining processing according to an embodiment of the present invention;
fig. 5 is a schematic flow chart of downlink signal calibration according to an embodiment of the present invention;
fig. 6 is a flowchart illustrating a method for processing uplink signals based on a multi-channel signal processing system according to an embodiment of the present invention;
fig. 7 is a flowchart illustrating an uplink signal splitting process according to an embodiment of the present invention;
fig. 8 is a schematic flowchart of uplink signal calibration according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of an apparatus for performing downlink signal processing based on a multi-channel signal processing system according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of an apparatus for performing uplink signal processing based on a multi-channel signal processing system according to an embodiment of the present invention;
fig. 11 is a logic block diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
The following further describes embodiments of the present invention with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Fig. 2 shows a schematic structural diagram of a multi-channel signal processing system provided in this embodiment, including: a power divider 201 and a circulator 202;
a first end of the power divider 201 is connected to the far-end rf module 203, and a second end of the power divider is connected to the first end of the circulator 202, and is configured to perform splitting processing on an uplink signal sent by the circulator 202 in an uplink, or perform combining processing on multiple downlink signals sent by the far-end rf module 203 in a downlink;
a second end of the circulator is connected to the first signal source 204, and a third end of the circulator is connected to the spectrum analyzer 205, and is configured to separate the received multiple channels of signals into an uplink signal and a downlink signal, and send the separated uplink signal to the power divider 201 and the separated downlink signal to the spectrum analyzer 205, respectively, according to a transmission direction of the signals.
Specifically, the multi-channel signal processing system provided in this embodiment is a duplex system, and both uplink and downlink signals can be analyzed simultaneously in multiple channels: the downlink is that a signal sent by the remote rf module 203 sequentially passes through the power divider 201 (in the downlink, the power divider may also be referred to as a combiner) and the circulator 202 until the spectrum analyzer 205 receives and analyzes the signal; the uplink is that a signal sent by the first signal source 204 sequentially passes through the circulator 202 and the power divider 201 until the remote rf module 203 receives and analyzes the signal.
The system uses the power divider 201 to realize the splitting of the uplink and the combining of the downlink. The number of ports of the power divider 201, the number of power dividers used, and whether concatenation is required are all flexibly selected according to the number of channels of the remote rf module 203. If the attenuation of the signal after the power division cascade connection is too large, which causes the feedback signal to be too small, a power amplifier module can be selectively added into the power divider to amplify the signal.
In the embodiment, the power divider is used for simultaneously collecting the radio frequency signals of a plurality of channels, so that the multi-channel signals of the far-end radio frequency module are simultaneously measured, the measurement time of multi-channel equipment is reduced by times, and the efficiency is improved; passive devices such as a power divider and a circulator are used for replacing active devices in the prior art, so that the cost is saved; due to the use of the passive device, the environment is low in temperature influence, and the environment reliability is enhanced; meanwhile, the environment is simple, the time period of development driving is saved, and the method is easy to use.
Further, on the basis of the above embodiment, the method includes:
if the number of the power dividers is greater than or equal to 2, the multi-path signal processing system further includes a secondary power divider 206, as shown in fig. 2; the secondary power divider 206 is disposed between the plurality of power dividers and the circulator, and the secondary power divider 206 is configured to combine the multiple signals output by the plurality of power dividers.
Specifically, as shown in fig. 2, when the number of the power dividers is greater than or equal to 2, each power divider outputs one signal, and multiple signals cannot be input to the circulator 202 at the same time, so that the secondary power divider 206 is required to combine multiple signals for the second time.
Further, on the basis of the above embodiment, the connection between the first end of the power divider 201 and the far-end rf module 203 specifically includes:
each channel of the remote rf module 203 is sequentially connected to a port of each power divider 201, and the specific connection manner includes:
an nth channel of the far-end radio frequency module 203 is connected to an nth port of an mth power divider, an nth-1 channel is connected to an nth-1 port of the mth power divider, an nth-2 channel is connected to an nth-2 port of the mth power divider, and so on, and a 1 st channel is connected to a 1 st port of the 1 st power divider;
the output port of the Mth power divider is connected with the mth port of the secondary power divider, the output port of the M-1 th power divider is connected with the M-1 th port of the secondary power divider, and so on, the output port of the 1 st power divider is connected with the 1 st port of the secondary power divider;
wherein N, M, N and M are positive integers, M × N is more than or equal to N, and M is less than or equal to M.
Specifically, each port of the remote rf module 203 is sequentially connected to each port of each power divider, and the output port of each power divider is sequentially connected to each port of the secondary power divider, as shown in fig. 2, to form a signal transmission path.
Further, on the basis of the above embodiment, the method further includes: an attenuator;
the attenuator is disposed between the spectrometer and the circulator, not shown in fig. 2, and is configured to attenuate a signal output from the circulator to the spectrometer.
The system divides the uplink signals by the power divider to realize the simultaneous analysis of all the uplink signals, or combines the downlink signals, and then uses an algorithm to split the uplink signals, and utilizes the function of a frequency spectrograph with multiple mark points to realize the simultaneous acquisition of the downlink signal multi-channel radio frequency signals, thereby greatly saving the test time of multi-channel equipment, in particular to large-scale antenna equipment such as a 5G base station; for equipment with different channel numbers, the number of testable channels can be flexibly adjusted by adjusting the number of ports of the power divider and the secondary power divider; the attenuator through circulator and frequency spectrograph end can play the effect of protection instrument.
Further, on the basis of the above embodiment, the method further includes: a load 207;
the load 207 is connected to the redundant port of the power divider, as shown in fig. 2, the load 207 is connected to the redundant port of the secondary power divider 206. It should be noted that, if the power divider 201 has redundant ports, a load also needs to be connected to prevent the redundant channel air interfaces on the power divider from causing total reflection of signals and damaging devices and meters when the signals are sent out, and the redundant ports on the power divider need to be connected to a load with appropriate power to absorb power.
The redundant port is a port which is not connected with the channel of the far-end radio frequency module in the power divider.
Fig. 3 is a schematic flowchart illustrating a method for downlink signal processing based on a multi-channel signal processing system according to this embodiment, including:
s301, grouping the radio frequency channels of the remote radio frequency modules, and receiving downlink signals sent by each channel of each group of the remote radio frequency modules.
And only one group of channels sends downlink signals to the power divider at the same time.
Specifically, referring to the processing flow of the downlink signal in fig. 4, N channels of the far-end rf module 203 are grouped, one group is k channels, the same group of channels simultaneously sends the downlink signal to the spectrum analyzer 205, and the spectrum analyzer 205 collects the combined signals of the k channels each time, and analyzes the collected combined signals to reduce the combined signals into single-channel signals.
In order to distinguish the channels in the same group of channels, the downlink signals of the channels in each group are shifted in frequency at equal intervals of frequency F, namely, the 1 st channel signal frequency point is F MHz, the second channel frequency point is (F + F) MHz, and the Nth channel is (F + N x F) MHz. The frequency band of the radio frequency front-end module 203 is (W-W) MHz, and in order to satisfy that the frequencies of all channels are within the frequency band of the device, the signal frequency point needs to satisfy the following three conditions:
1)F>w；
2)(F+N*f)<W；
3)f*k<(W-w)。
mark points are arranged on frequency points F, (F + F), … … and (F + F N) of the frequency spectrograph, and single-channel signal analysis is carried out on information collected by each mark point. To meet the requirements, the characteristics of the spectrometer 205 need to meet the following requirements: the frequency band of the frequency spectrograph needs to be in the frequency band of the radio frequency front end signal; the spectrometer needs to have the function of setting multiple mark points.
It should be noted that only one combination signal can enter the spectrometer at the same time, specifically, the channel is closed after each channel signal is collected, and the channels used in the group are closed after a group of channel signals are collected.
And S302, combining the received downlink signals of the channels to obtain combined downlink signals.
Specifically, the remote rf module 203 sends the downlink signal to the power divider 201, and the power divider 201 combines the downlink signals merged into multiple channels and sends the combined downlink signal to the circulator 202. The one-way transmission characteristics of the circulator determine the transmission of the rf signal to the spectrometer 205 after receiving the combined signal.
Specifically, the channel number of the power divider, the total number of the power dividers, and whether concatenation is required are selected according to the channel number sum of the remote rf module 203. The nth channel of the far-end rf module 203 is connected to the nth port of the mth power divider; the (N-1) th channel is connected to the (N-1) th port … … of the Mth power divider, and the 1 st channel is connected to the 1 st port of the 1 st power divider. If a plurality of power dividers are provided, secondary combining is required, an output port of the mth power divider is connected with the mth port of the secondary power divider, and an output port of the M-1 power divider is connected with the mth-1 port … … of the secondary power divider, and an output port of the 1 st power divider is connected with the 1 st port of the secondary power divider.
And S303, sending the combined downlink signal to the circulator, sending the combined downlink signal to the frequency spectrograph through the circulator, and acquiring downlink radio frequency signal values of each channel of the remote radio frequency module, which are obtained by the frequency spectrograph.
Specifically, the combined downlink signal passes through the circulator 202 and enters the spectrum analyzer 205, as shown in fig. 4. The three ports of the circulator 202 are connected to the first signal source 204, the output end of the power divider 201, and the spectrum analyzer 205 clockwise, respectively, as shown in fig. 2. If the spectrometer end is disconnected, the combined signal flows to the first signal source 204 due to the load adaptation of the spectrometer end, which is very likely to damage the front-end amplification of the signal source. Therefore, to protect the first signal source 204 and also to prevent the signal from being too large and damaging the spectrometer 205, an attenuator of a suitable size is connected to the spectrometer end of the circulator.
In the embodiment, the radio frequency signals of a plurality of channels are acquired simultaneously, so that the multi-channel signals of the far-end radio frequency module are measured simultaneously, the measurement time of multi-channel equipment is reduced exponentially, and the efficiency is improved; the passive device is used for replacing an active device in the prior art, so that the cost is saved; due to the use of the passive device, the environment is low in temperature influence, and the environment reliability is enhanced; meanwhile, the environment is simple, the time period of development driving is saved, and the method is easy to use.
Further, on the basis of the above embodiment of the method, the method further comprises:
and S304, receiving the downlink calibration signal sent by the second signal source, combining the downlink calibration signal, and sending the combined downlink calibration signal to the circulator, where the combined downlink calibration signal is sent to the frequency spectrograph via the circulator, and obtaining a downlink difference compensation value of each channel of the remote radio frequency module, which is obtained by the frequency spectrograph.
S305, obtaining the actual downlink signal value of each channel of the far-end radio frequency module according to the downlink difference compensation value of each channel and the downlink radio frequency signal value of each channel.
A third end of the power divider is connected to the second signal source 208, as shown in fig. 5, and is configured to receive a downlink calibration signal sent by the second signal source 208, combine the calibration signal, send the combined calibration signal to the circulator 202, and send the downlink calibration signal to the spectrum analyzer 205 through the circulator 202, so as to obtain difference compensation of each channel of the remote radio frequency module 203.
Specifically, the line loss of each channel of the downlink needs to be calibrated. As shown in fig. 5, the second signal source 208 replaces each channel of the far-end rf module 203 to sink the signal to the power divider, and the signal size is set to 0dBm for convenience of calculation. In the 1 st channel of the remote rf module 203, the signal received by the spectrum measuring instrument 205 is measured to be Amp1Then the insertion loss value in the channel 1 environment is (Amp)1-0)＝Amp1dB. And analogizing in turn, wherein the line loss of the ith channel is AmpidB. Due to the line loss difference of the external environment of each channel, difference compensation needs to be performed after channel power is collected. When analyzing a multichannel signal, the offset of the spectrometer is set to a channel-to-line loss value Amp1As a reference value, (Amp) should be added accordingly when calculating the gain of each channeli-Amp1) The offset value of dB eliminates the difference between the channels.
In the downlink, a downlink signal is split and restored into a single-path signal for analysis, and the difference between channels is avoided by using a compensation algorithm.
Fig. 6 is a schematic flowchart illustrating a method for processing an uplink signal based on a multi-channel signal processing system according to this embodiment, where the method includes:
s601, receiving the uplink signal sent by the first signal source through the circulator, and performing shunting processing on the received uplink signal to obtain a shunted uplink signal.
And S602, sending the branched uplink signal to the frequency spectrograph, and obtaining an uplink difference compensation value of each channel of the remote radio frequency module, which is obtained by the frequency spectrograph.
S603, obtaining the actual uplink signal value of each channel of the remote radio frequency module according to the received uplink radio frequency signal value of each channel and the uplink difference compensation value of each channel.
Specifically, as shown in fig. 7, in the uplink signal processing process, an uplink sends a signal to be analyzed to a first signal source 204, an uplink signal is separated from the uplink and downlink signals by using a circulator 202, the uplink signal is split by using a power splitter 201, the RRU receiver receives and analyzes multiple signals, and a compensation algorithm is used to avoid differences between channels.
In a test environment, as shown in fig. 7, a first signal source 204 is used to transmit a signal in place of a termination signal in an application scenario. A signal sent by the first signal source 204 passes through the circulator 202, enters the secondary power divider 206 and the power divider 201, is split into multiple paths of signals, and enters the far-end rf module 203 through the antenna interface.
The specific steps of splitting are similar to combining: the channel number of the power divider, the total number of the power dividers and whether concatenation is needed are selected according to the channel number sum of the rf front-end module 203. The Nth channel of the radio frequency front end is connected with the nth port of the Mth power divider; the (N-1) th channel is connected to the (N-1) th port … … of the Mth power divider, and the 1 st channel is connected to the 1 st port of the 1 st power divider. If there are multiple power dividers, secondary power division is needed. The output port of the mth power divider is connected to the mth port of the secondary power divider, and the output port of the M-1 power divider is connected to the mth-1 port … … of the secondary power divider, and the output port of the 1 st power divider is connected to the 1 st port of the secondary power divider.
As shown in fig. 7, after a branch signal sent by the first signal source 204 enters the remote rf module 203, the multi-path uplink switch is turned on at the same time, after the uplink signal is subjected to a/D conversion by a transceiver, the FPGA (Field-programmable gate Array) sequentially performs power statistics on the uplink signal of each channel, and the sampling value is Pi。
After sampling, the line loss difference of each channel needs to be compensated, and the uplink difference compensation process is similar to that of the downlink, as shown in the figureAs shown in fig. 8, the first signal source 204 replaces each channel of the far-end rf module 203 to sink the signal to the power divider 201, and the signal size is 0 dBm. Measuring the magnitude of the signal received by the second frequency spectrograph 209 end as Amp1Then the insertion loss value in the channel 1 environment is (Amp)1-0)＝Amp1dB. And analogizing in turn, wherein the line loss of the ith channel is AmpidB. The power value of the uplink signal of the ith channel is (P)i+Ampi) dbm, the multi-channel signals can be combined and then restored into a single-channel signal for analysis, and the difference among the channels can be avoided through a compensation algorithm.
In the embodiment, the radio frequency signals of a plurality of channels are acquired simultaneously, so that the multi-channel signals of the far-end radio frequency module are measured simultaneously, the measurement time of multi-channel equipment is reduced exponentially, and the efficiency is improved; the passive device is used for replacing an active device in the prior art, so that the cost is saved; due to the use of the passive device, the environment is low in temperature influence, and the environment reliability is enhanced; meanwhile, the environment is simple, the time period of development driving is saved, the use is easy, and the antenna array is suitable for various antenna quantity scenes.
Fig. 9 is a schematic structural diagram of an apparatus for performing downlink signal processing based on a multi-channel signal processing system according to this embodiment, and the apparatus includes: a channel grouping module 901, a combining processing module 902 and a downlink signal value obtaining module 903, wherein:
the channel grouping module 901 is configured to group the radio frequency channels of the remote radio frequency modules, and receive downlink signals sent by each channel of each group of the remote radio frequency modules.
The combining processing module 902 is configured to perform combining processing on the received downlink signals of each channel to obtain combined downlink signals.
The downlink signal value obtaining module 903 is configured to send the combined downlink signal to the circulator, send the combined downlink signal to the frequency spectrograph through the circulator, and obtain a downlink radio frequency signal value of each channel of the far-end radio frequency module, where the downlink radio frequency signal value is obtained by the frequency spectrograph.
And only one group of channels sends downlink signals to the power divider at the same time.
Specifically, the channel grouping module 901 groups the radio frequency channels of the remote radio frequency modules, and receives downlink signals sent by each channel of each group of the remote radio frequency modules. The combining processing module 902 performs combining processing on the received downlink signals of each channel to obtain combined downlink signals. The downlink signal value obtaining module 903 sends the combined downlink signal to the circulator, sends the combined downlink signal to the frequency spectrograph through the circulator, and obtains a downlink radio frequency signal value of each channel of the remote radio frequency module, which is obtained by the frequency spectrograph.
In the embodiment, the radio frequency signals of a plurality of channels are acquired simultaneously, so that the multi-channel signals of the far-end radio frequency module are measured simultaneously, the measurement time of multi-channel equipment is reduced exponentially, and the efficiency is improved; the passive device is used for replacing an active device in the prior art, so that the cost is saved; due to the use of the passive device, the environment is low in temperature influence, and the environment reliability is enhanced; meanwhile, the environment is simple, the time period of development driving is saved, and the method is easy to use.
The apparatus for performing downlink signal processing based on a multi-channel signal processing system according to this embodiment may be used to implement the method embodiments, and the principle and technical effect are similar, which are not described herein again.
Fig. 10 is a schematic structural diagram of an apparatus for performing uplink signal processing based on a multi-channel signal processing system according to this embodiment, and the apparatus includes: a signal receiving module 1001, a difference compensation module 1002, and an uplink signal value obtaining module 1003, wherein:
the signal receiving module 1001 is configured to receive an uplink signal sent by the first signal source through the circulator, and perform branch processing on the received uplink signal to obtain a branched uplink signal;
the difference compensation module 1002 is configured to send the branched uplink signal to the spectrum analyzer, and obtain an uplink difference compensation value of each channel of the remote radio frequency module, where the uplink difference compensation value is obtained by the spectrum analyzer;
the uplink signal value obtaining module 1003 is configured to obtain an actual uplink signal value of each channel of the remote rf module according to the received uplink rf signal value of each channel and the uplink difference compensation value of each channel.
Specifically, the signal receiving module 1001 receives an uplink signal sent by the first signal source through the circulator, and performs a splitting process on the received uplink signal to obtain a split uplink signal; the difference compensation module 1002 sends the branched uplink signal to the spectrum analyzer, and obtains an uplink difference compensation value of each channel of the remote radio frequency module, which is obtained by the spectrum analyzer; the uplink signal value obtaining module 1003 obtains an actual uplink signal value of each channel of the remote rf module according to the received uplink rf signal value of each channel and the uplink difference compensation value of each channel.
In the embodiment, the radio frequency signals of a plurality of channels are acquired simultaneously, so that the multi-channel signals of the far-end radio frequency module are measured simultaneously, the measurement time of multi-channel equipment is reduced exponentially, and the efficiency is improved; the passive device is used for replacing an active device in the prior art, so that the cost is saved; due to the use of the passive device, the environment is low in temperature influence, and the environment reliability is enhanced; meanwhile, the environment is simple, the time period of development driving is saved, and the method is easy to use.
The apparatus for processing uplink signals based on a multi-channel signal processing system according to this embodiment may be used to implement the method embodiments, and the principle and technical effect are similar, which are not described herein again.
Referring to fig. 11, the electronic device includes: a processor (processor)1101, a memory (memory)1102, and a bus 1103;
wherein the content of the first and second substances,
the processor 1101 and the memory 1102 communicate with each other via the bus 1103;
the processor 1101 is configured to call program instructions in the memory 1102 to perform the methods provided by the above-described method embodiments.
The present embodiments disclose a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, enable the computer to perform the methods provided by the above-described method embodiments.
The present embodiments provide a non-transitory computer-readable storage medium storing computer instructions that cause the computer to perform the methods provided by the method embodiments described above.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
It should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (13)
1. A multi-channel signal processing system, comprising: a power divider and a circulator;
the first end of the power divider is connected with the far-end radio frequency module, the second end of the power divider is connected with the first end of the circulator, and the power divider is used for carrying out shunting processing on an uplink signal sent by the circulator in an uplink or carrying out combining processing on a plurality of paths of downlink signals sent by the far-end radio frequency module in a downlink;
the second end of the circulator is connected with the first signal source, the third end of the circulator is connected with the frequency spectrograph, and the circulator is used for separating the received multipath signals into uplink signals and downlink signals, and respectively sending the separated uplink signals to the power divider and the downlink signals to the frequency spectrograph according to the transmission direction of the signals.
2. The multi-channel signal processing system of claim 1, comprising:
if the number of the power dividers is more than or equal to 2, the multi-path signal processing system also comprises two-stage power dividers;
the secondary power divider is arranged between the power dividers and the circulator and used for combining the multi-path signals output by the power dividers.
3. The multi-channel signal processing system of claim 2, wherein the first end of the power divider is connected to the remote rf module, and specifically comprises:
each channel of the far-end radio frequency module is sequentially connected with a port of each power divider, and the specific connection mode comprises the following steps:
an nth channel of the far-end radio frequency module is connected with an nth port of an Mth power divider, an Nth-1 th channel is connected with an nth-1 th port of the Mth power divider, an Nth-2 th channel is connected with an nth-2 th port of the Mth power divider, and so on, and the 1 st channel is connected with a 1 st port of the 1 st power divider;
the output port of the Mth power divider is connected with the mth port of the secondary power divider, the output port of the M-1 th power divider is connected with the M-1 th port of the secondary power divider, and so on, the output port of the 1 st power divider is connected with the 1 st port of the secondary power divider;
wherein N, M, N and M are positive integers, M × N is more than or equal to N, and M is less than or equal to M.
4. The multi-channel signal processing system of claim 1, further comprising: an attenuator;
the attenuator is arranged between the frequency spectrograph and the circulator and is used for attenuating the signal output by the circulator to the frequency spectrograph.
5. The multi-channel signal processing system of claim 4, further comprising: a load;
the load is connected with redundant ports of the power divider;
the redundant port is a port which is not connected with the channel of the far-end radio frequency module in the power divider.
6. The multi-channel signal processing system according to claim 5, wherein a third terminal of the power divider is connected to a second signal source, and is configured to receive a downlink calibration signal sent by the second signal source, combine the calibration signal, send the combined calibration signal to the circulator, and send the downlink calibration signal to the spectrum analyzer via the circulator, so as to obtain difference compensation of each channel of the remote radio frequency module.
7. A multi-channel downlink signal processing method is characterized by comprising the following steps:
grouping radio frequency channels of the remote radio frequency modules, and receiving downlink signals sent by each channel of each group of the remote radio frequency modules;
combining the received downlink signals of each channel to obtain combined downlink signals;
sending the combined downlink signal to the circulator, sending the combined downlink signal to the frequency spectrograph through the circulator, and acquiring downlink radio frequency signal values of each channel of the far-end radio frequency module, which are obtained by the frequency spectrograph;
and only one group of channels sends downlink signals to the power divider at the same time.
8. The method of claim 7, further comprising:
receiving a downlink calibration signal sent by the second signal source, combining the downlink calibration signal, and sending the combined downlink calibration signal to the circulator, where the combined downlink calibration signal is sent to the frequency spectrograph through the circulator, and a downlink difference compensation value of each channel of the far-end radio frequency module obtained by the frequency spectrograph is obtained;
and obtaining the actual downlink signal value of each channel of the remote radio frequency module according to the downlink difference compensation value of each channel and the downlink radio frequency signal value of each channel.
9. A method for processing multiple uplink signals, comprising:
receiving an uplink signal sent by the first signal source through the circulator, and performing shunting processing on the received uplink signal to obtain a shunted uplink signal;
sending the branched uplink signal to the frequency spectrograph, and obtaining an uplink difference compensation value of each channel of the remote radio frequency module, which is obtained by the frequency spectrograph;
and obtaining the actual uplink signal value of each channel of the remote radio frequency module according to the received uplink radio frequency signal value of each channel and the uplink difference compensation value of each channel.
10. A multi-channel downlink signal processing apparatus, comprising:
the channel grouping module is used for grouping the radio frequency channels of the remote radio frequency module and receiving downlink signals sent by each channel of each group of the remote radio frequency module;
the combining processing module is used for combining the received downlink signals of each channel to obtain combined downlink signals;
a downlink signal value obtaining module, configured to send the combined downlink signal to the circulator, send the combined downlink signal to the frequency spectrograph through the circulator, and obtain a downlink radio frequency signal value of each channel of the far-end radio frequency module, where the downlink radio frequency signal value is obtained by the frequency spectrograph;
and only one group of channels sends downlink signals to the power divider at the same time.
11. A multi-path uplink signal processing apparatus, comprising:
the signal receiving module is used for receiving the uplink signal sent by the first signal source through the circulator and carrying out shunting processing on the received uplink signal to obtain a shunted uplink signal;
the difference compensation module is used for sending the branched uplink signals to the frequency spectrograph and acquiring uplink difference compensation values of each channel of the remote radio frequency module, which are obtained by the frequency spectrograph;
and the uplink signal value acquisition module is used for obtaining the actual uplink signal value of each channel of the remote radio frequency module according to the received uplink radio frequency signal value of each channel and the uplink difference compensation value of each channel.
12. An electronic device, comprising:
at least one processor; and
at least one memory communicatively coupled to the processor, wherein:
the memory stores program instructions executable by the processor, the processor invoking the program instructions to perform the method of any of claims 7 to 9.
13. A non-transitory computer-readable storage medium storing a computer program that causes a computer to perform the method of any one of claims 7 to 9.
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