CN112865851B - Signal sampling method and device, relay equipment and storage medium - Google Patents
Signal sampling method and device, relay equipment and storage medium Download PDFInfo
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- CN112865851B CN112865851B CN202011640264.5A CN202011640264A CN112865851B CN 112865851 B CN112865851 B CN 112865851B CN 202011640264 A CN202011640264 A CN 202011640264A CN 112865851 B CN112865851 B CN 112865851B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
- H04B7/15507—Relay station based processing for cell extension or control of coverage area
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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
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The application relates to a signal sampling method, a signal sampling device, relay equipment and a storage medium, wherein the relay equipment receives a radio frequency signal sent by a host base station in a preset beam scanning range; performing down-conversion processing on a radio frequency signal received under a first scanning angle in a beam scanning range to obtain a down-conversion signal under the first scanning angle; filtering the down-conversion signal by using a filter to obtain a narrow-band signal corresponding to the down-conversion signal; the filtering bandwidth of the filter is smaller than the bandwidth of the down-conversion signal; sampling the narrowband signal by using a sampler to obtain a sampling signal of the narrowband signal; the sampling bandwidth of the sampling device is adaptive to the filtering bandwidth of the filter and is smaller than the bandwidth of the down-conversion signal. The method can reduce the cost of the relay equipment.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a signal sampling method, an apparatus, a relay device, and a storage medium.
Background
With the development of 5G communication technology, in order to overcome the problem of shortage of sub-6G spectrum resources, millimeter wave communication is generally adopted in the market at present based on the large bandwidth characteristic of millimeter waves. However, in the 5G millimeter wave band, the spatial loss of electromagnetic wave signals is large, the propagation path is short, and the penetration capability is poor, so that a large number of relay devices are usually arranged between the host base station and the user equipment, and the problem of millimeter wave coverage loss in non-Line-of-Sight transmission (Not Line of Sight, abbreviated as NLOS) scenes from outdoor to indoor, at corners and the like can be effectively solved. The basic function of the relay device is to amplify and forward the signal of the host base station to the user equipment, and the relay device belongs to an auxiliary device in a communication system.
In the traditional method, a relay device in a millimeter wave frequency band can adopt a high-gain antenna to receive a signal, and after the received signal is subjected to frequency conversion processing, a high-bandwidth sampling device is adopted to sample the frequency-converted signal to obtain a sampling signal; further, the relay device may identify the signal sent by the host base station according to the sampling signal, amplify the signal sent by the host base station, and send the amplified signal to the user equipment.
However, since the cost of the high-bandwidth baseband processing device required in the millimeter wave band relay device is high, the cost of the relay device is high by adopting the above-mentioned conventional communication method.
Disclosure of Invention
In view of the above, it is necessary to provide a signal sampling method, a signal sampling apparatus, a relay device, and a storage medium that reduce the cost of the relay device.
A signal sampling method is suitable for relay equipment, and the relay equipment comprises a sampler and a filter; the method comprises the following steps:
receiving a radio frequency signal sent by a host base station in a preset beam scanning range;
carrying out down-conversion processing on a radio frequency signal received under a first scanning angle in a wave beam scanning range to obtain a down-conversion signal under the first scanning angle;
filtering the down-conversion signal by using a filter to obtain a narrow-band signal corresponding to the down-conversion signal; the filtering bandwidth of the filter is smaller than the bandwidth of the down-conversion signal;
sampling the narrowband signal by using a sampler to obtain a sampling signal of the narrowband signal; wherein, the sampling bandwidth of the sampler is adaptive to the filtering bandwidth of the filter and is smaller than the bandwidth of the down-conversion signal.
In one embodiment, the radio frequency signal includes a synchronization signal, and the method further includes:
and demodulating the sampling signal to acquire the signal quality of the synchronous signal in the sampling signal.
In one embodiment, the radio frequency signal includes a radio frequency signal received at a plurality of first scanning angles in a beam scanning range, the sampling signal includes a sampling signal corresponding to each first scanning angle, and the signal quality of the synchronization signal includes the signal quality of the synchronization signal at each first scanning angle; the method further comprises the following steps:
determining a target scanning angle among a plurality of first scanning angles based on the signal quality of each synchronization signal;
and carrying out signal transmission with the host base station by adopting the target scanning angle.
In one embodiment, the filtering the down-converted signal by using the filter to obtain a narrow-band signal corresponding to the down-converted signal includes:
determining a filtering bandwidth of a filter based on a sampling bandwidth of a sampler;
and filtering the down-conversion signal by adopting a filtering bandwidth to obtain a narrow-band signal corresponding to the down-conversion signal.
In one embodiment, the filtering, by using the filtering bandwidth, the down-converted signal to obtain a narrow-band signal corresponding to the down-converted signal includes:
determining the center frequency of the filter according to the preset frequency position of the synchronous signal;
configuring a filtering frequency range of the filter according to the center frequency and the filtering bandwidth; and filtering the down-conversion signal by adopting a filter corresponding to the filtering frequency range to obtain a narrow-band signal corresponding to the down-conversion signal.
In one embodiment, the filtering, by using the filtering bandwidth, the down-converted signal to obtain a narrow-band signal corresponding to the down-converted signal includes:
dividing the frequency range of the down-conversion signal into a plurality of sampling frequency intervals which are sequentially arranged; the width of the sampling frequency interval is matched with the filtering bandwidth;
respectively configuring a filtering frequency range of the filter based on each sampling frequency interval;
and respectively filtering the down-conversion signals through the configured filters to obtain narrow-band signals corresponding to different sampling frequency intervals in the down-conversion signals.
In one embodiment, the demodulating the sampling signal to obtain the signal quality of the synchronization signal in the sampling signal includes:
identifying a target sampling signal carrying a synchronous signal in the sampling signals of the narrow-band signals corresponding to each sampling frequency interval based on a preset signal identification of the synchronous signal;
and demodulating the target sampling signal to obtain the signal quality of the synchronous signal.
In one embodiment, the beam scanning range includes a plurality of scanning intervals; receiving a radio frequency signal sent by a host base station in a preset beam scanning range, wherein the method comprises the following steps:
performing beam scanning within a preset beam scanning range by adopting a first scanning interval to obtain space signals under a plurality of second scanning angles; the beam scanning range comprises a plurality of scanning intervals; the second scanning angle corresponds to the scanning interval one by one;
respectively carrying out level detection on the space signals corresponding to the plurality of second scanning angles to obtain signal receiving levels corresponding to the second scanning angles;
selecting a candidate scanning angle from the plurality of second scanning angles according to the signal receiving level, and determining a scanning interval corresponding to the candidate scanning angle as a target scanning interval;
adopting a second scanning interval to carry out beam scanning in a target scanning interval to obtain radio frequency signals received under each first scanning angle; the second scanning interval is smaller than the first scanning interval.
In one embodiment, the performing level detection on the spatial signals corresponding to the plurality of second scanning angles respectively to obtain the signal receiving levels corresponding to the second scanning angles includes:
respectively carrying out down-conversion processing on the space signals corresponding to each second scanning angle to obtain intermediate frequency signals under each second scanning angle;
and respectively carrying out level detection on the intermediate frequency signals under each second scanning angle to obtain signal receiving levels corresponding to each second scanning angle.
In one embodiment, the selecting the candidate scan angle from the plurality of second scan angles according to the signal reception level includes:
and determining a second scanning angle corresponding to the maximum receiving level in the signal receiving levels as a candidate scanning angle.
In one embodiment, the determining the target scan angle in each first scan angle based on the signal quality of each synchronization signal includes:
and determining the first scanning angle corresponding to the synchronous signal with the maximum signal quality at each first scanning angle as the target scanning angle.
In one embodiment, the above signal transmission with the host base station using the target scanning angle includes:
in downlink transmission, a target scanning angle is adopted to receive a downlink signal sent by a host base station, and the downlink signal is subjected to relay amplification and then sent to user equipment;
in uplink transmission, receiving an uplink signal sent by user equipment, and performing relay amplification on the uplink signal; and transmitting the uplink signal after the relay amplification to the host base station by adopting the target scanning angle.
In one embodiment, the down-converting the radio frequency signal received at the first scanning angle in the beam scanning range to obtain a down-converted signal at the first scanning angle includes:
coupling processing is carried out on the radio frequency signals received under the first scanning angle, and radio frequency coupling signals are obtained;
and performing down-conversion processing on the radio frequency coupling signal to obtain a down-conversion signal under a first scanning angle.
An apparatus for sampling a signal, the apparatus being provided in a relay device, the relay device comprising a sampler and a filter, comprising:
the receiving module is used for receiving the radio frequency signal sent by the host base station in a preset beam scanning range;
the frequency conversion module is used for carrying out down-conversion processing on the radio frequency signal received under a first scanning angle in a beam scanning range to obtain a down-conversion signal under the first scanning angle;
the filtering module is used for filtering the down-conversion signal by using a filter to obtain a narrow-band signal corresponding to the down-conversion signal; the filtering bandwidth of the filter is smaller than the bandwidth of the down-conversion signal;
the sampling module is used for sampling the narrowband signal by using the sampler to obtain a sampling signal of the narrowband signal; wherein the sampling bandwidth of the sampler is adapted to the filtering bandwidth of the filter and is smaller than the bandwidth of the down-converted signal.
A relay device, the relay device comprising a receiver, a transmitter, a sampler, a filter, and a processor:
the receiver is used for receiving the radio frequency signal sent by the host base station in a preset beam scanning range;
the processor is used for carrying out down-conversion processing on the radio frequency signal received under a first scanning angle in a beam scanning range to obtain a down-conversion signal under the first scanning angle;
the filter is used for filtering the down-conversion signal to obtain a narrow-band signal corresponding to the down-conversion signal; the filtering bandwidth of the filter is smaller than the bandwidth of the down-conversion signal;
the sampler is used for sampling the narrowband signal to obtain a sampling signal of the narrowband signal; wherein the sampling bandwidth of the sampler is adapted to the filtering bandwidth of the filter and is smaller than the bandwidth of the down-converted signal.
A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method of sampling a signal as described above.
The signal sampling method, the signal sampling device, the relay equipment and the storage medium are characterized in that the relay equipment receives a radio frequency signal sent by a host base station in a preset beam scanning range; performing down-conversion processing on a radio frequency signal received under a first scanning angle in a beam scanning range to obtain a down-conversion signal under the first scanning angle; filtering the down-conversion signal by using a filter to obtain a narrow-band signal corresponding to the down-conversion signal; the filtering bandwidth of the filter is smaller than the bandwidth of the down-conversion signal; sampling the narrowband signal by using a sampler to obtain a sampling signal of the narrowband signal; the sampling bandwidth of the sampling device is adaptive to the filtering bandwidth of the filter and is smaller than the bandwidth of the down-conversion signal. Because the relay equipment utilizes the filter to filter the down-conversion signal, the bandwidth of the narrow-band signal corresponding to the down-conversion signal is smaller than that of the down-conversion signal; furthermore, the bandwidth of the narrowband signal is smaller, so that the narrowband signal can be sampled by a sampler with smaller sampling bandwidth, and the requirement on the sampling bandwidth of the sampler is reduced; because the cost of the baseband processing devices such as the sampler and the like is positively correlated with the sampling bandwidth, the cost of the relay equipment can be greatly reduced by using the sampler with smaller sampling bandwidth.
Drawings
FIG. 1 is a diagram of an embodiment of a sampling method for a signal;
FIG. 2 is a flow diagram illustrating a method for sampling a signal according to one embodiment;
FIG. 3 is a flow diagram illustrating a method for sampling a signal according to one embodiment;
FIG. 4 is a flow chart illustrating a method for sampling a signal according to another embodiment;
FIG. 5 is a flow chart illustrating a method for sampling a signal according to another embodiment;
FIG. 6 is a flow chart illustrating a method for sampling a signal according to another embodiment;
FIG. 7 is a block diagram of a sampling apparatus for a signal in one embodiment;
FIG. 8 is a block diagram of a sampling apparatus for a signal in one embodiment;
FIG. 9 is a block diagram of a sampling apparatus for a signal in one embodiment;
FIG. 10 is a block diagram of a sampling apparatus for a signal in one embodiment;
FIG. 11 is a block diagram showing an example of a signal sampling apparatus;
FIG. 12 is a block diagram showing a configuration of a signal sampling apparatus according to an embodiment;
FIG. 13 is an internal configuration diagram of a relay device in one embodiment;
fig. 14 is an internal configuration diagram of a relay device in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The signal sampling method provided by the application can be applied to the application environment shown in fig. 1. The relay device 100 may communicate with the donor base station 200 and the user equipment 300. The user device 300 may be, but is not limited to, various personal computers, notebook computers, smart phones, tablet computers, and portable wearable devices, and the relay device 100 and the host base station 200 may be, but is not limited to, devices in the following systems, including: global System for Mobile communications (GSM) System, code Division Multiple Access (CDMA) System, wideband Code Division Multiple Access (WCDMA) System, long Term Evolution (LTE) System, and 5th-Generation (5G) System.
In one embodiment, as shown in fig. 2, a method for sampling a signal is provided, which is described by taking an example that the method is applied to a relay device in fig. 1, where the relay device may include a sampler and a filter, and the method includes:
s101, receiving radio frequency signals sent by a host base station in a preset beam scanning range.
The relay device is configured to amplify a signal sent by the host base station and send the amplified signal to the user equipment, and/or amplify a signal sent by the user equipment and send the amplified signal to the host base station. The relay equipment is arranged between the host base station and the user equipment, so that the problem of transmission loss of radio frequency signals in various non-line-of-sight transmission scenes such as indoor to outdoor, corner and the like can be effectively solved. The radio frequency signals can be radio frequency signals of various frequency bands such as an L frequency band, a C frequency band, an S frequency band and the like; optionally, the radio frequency signal is a signal in a millimeter wave frequency band, and the higher the frequency of the radio frequency signal is, the larger the transmission loss is.
The relay device may include a first antenna module to communicate with the donor base station, and a second antenna module to communicate with the user equipment. The relay device may further include an uplink processing channel and a downlink processing channel, where the uplink processing channel is used to amplify an uplink signal sent by the user equipment, and the downlink processing channel is used to amplify downlink data sent by the host base station; the uplink processing path and the downlink processing path may include devices such as a low noise amplifier, a power amplifier, a circulator, and an isolator. In addition, the relay device may further include a beam measurement module and a control module, where the beam measurement module is configured to measure a signal received by the antenna module, so that the control module may control the first antenna module in the relay device according to a measurement result.
The beam scanning range may be a coverage of a first antenna module in the relay device that communicates with the donor base station. The first antenna module may be a phased array antenna, a holographic antenna, or a lens antenna. The relay device may control the beam direction of the first antenna module to vary within the beam scanning range by the control unit. The relay device may adjust the beam direction by adjusting parameters of each antenna unit in the first antenna module, or may adjust the beam direction by adjusting a mechanical angle of a servo mechanism connected to the first antenna module, which is not limited herein. Optionally, the relay device may adjust the beam direction of the first antenna module by adjusting the amplitude and the phase of each antenna unit in the first antenna module, so as to implement beam forming.
In a preset beam scanning range, the relay device may receive the radio frequency signal sent by the base station through beam scanning, or may receive the radio frequency signal sent by the host base station at multiple preset scanning angles, which is not limited herein.
S102, performing down-conversion processing on the radio frequency signal received under the first scanning angle in the beam scanning range to obtain a down-conversion signal under the first scanning angle.
Wherein, the first scanning angle may be one angle or a plurality of angles; the plurality of first scanning angles are angles in a beam scanning range, and the first scanning angles may be uniformly distributed in the beam scanning range, or may be located in one scanning interval in the beam scanning range, which is not limited herein. For example, the beam scanning range may be 30 degrees to 120 degrees, and the first scanning angle may be 55 degrees, 60 degrees, 65 degrees, and 70 degrees, respectively.
After receiving the radio frequency signal at the first scanning angle, the relay device may perform down-conversion processing on the radio frequency signal to obtain a down-conversion signal at the first scanning angle. Specifically, the relay device may down-convert the radio frequency signal to a preset intermediate frequency, or down-convert the radio frequency signal to obtain a baseband signal. The down-conversion process may be one down-conversion, may also be two down-conversions, and may also be a multiple down-conversion, which is not limited herein.
S103, filtering the down-conversion signal by using a filter to obtain a narrow-band signal corresponding to the down-conversion signal; the filter bandwidth of the filter is less than the bandwidth of the down-converted signal.
Wherein the filter may be a band pass filter. The relay device may determine a filtering bandwidth of the filter based on a sampling bandwidth of the sampler; and then, filtering the down-conversion signal by adopting the filtering bandwidth to obtain a narrow-band signal corresponding to the down-conversion signal. Specifically, the filtering bandwidth may be equal to or smaller than the sampling bandwidth, which is not limited herein.
The type of filter may be a digital filter. The filter may be a fixed bandwidth filter or an adjustable bandwidth filter, and the type of the filter is not limited herein.
Because the filtering bandwidth of the filter is smaller than the bandwidth of the down-conversion signal, the relay device can perform filtering processing on the down-conversion signal through the filter to obtain a narrow-band signal of one frequency band in the down-conversion signal.
If the radio frequency signal under a plurality of first scanning angles is received by the relay device, the relay device may use the filter to perform filtering processing on the down-conversion signal under each first scanning angle, and then may obtain the narrowband signal corresponding to each first scanning angle. For example, after the relay device receives the radio frequency signal at the first scanning angle of 55 degrees, a narrowband signal at 55 degrees may be obtained; further, the relay device may adjust the beam direction of the first antenna module to the first scan angle of 60 degrees, and then obtain the narrowband signal at 60 degrees.
S104, sampling the narrowband signal by using a sampler to obtain a sampling signal of the narrowband signal; wherein the sampling bandwidth of the sampler is adapted to the filtering bandwidth of the filter and is smaller than the bandwidth of the down-converted signal.
On the basis of obtaining the narrowband signal corresponding to the first scanning angle, the relay device may perform sampling processing on the narrowband signal by using a sampler matched with a filtering bandwidth of the filter, and convert the narrowband signal into a digital signal. Since the filter bandwidth of the filter is smaller than the bandwidth of the down-converted signal, the sampling bandwidth of the sampler is smaller than the bandwidth of the down-converted signal.
In the signal sampling method, the relay equipment receives the radio frequency signal sent by the host base station in a preset beam scanning range; carrying out down-conversion processing on a radio frequency signal received under a first scanning angle in a wave beam scanning range to obtain a down-conversion signal under the first scanning angle; filtering the down-conversion signal by using a filter to obtain a narrow-band signal corresponding to the down-conversion signal; the filtering bandwidth of the filter is smaller than the bandwidth of the down-conversion signal; sampling the narrowband signal by using a sampler to obtain a sampling signal of the narrowband signal; the sampling bandwidth of the sampling device is adaptive to the filtering bandwidth of the filter and is smaller than the bandwidth of the down-conversion signal. Because the relay equipment utilizes the filter to filter the down-conversion signal, the bandwidth of the narrow-band signal corresponding to the down-conversion signal is smaller than that of the down-conversion signal; furthermore, the bandwidth of the narrowband signal is smaller, so that the narrowband signal can be sampled by a sampler with smaller sampling bandwidth, and the requirement on the sampling bandwidth of the sampler is reduced; because the cost of the baseband processing devices such as the sampler and the like is positively correlated with the sampling bandwidth, the cost of the relay equipment can be greatly reduced by using the sampler with smaller sampling bandwidth.
In an embodiment, the radio frequency signal includes a synchronization signal, and the relay device may demodulate the sampling signal to obtain the signal quality of the synchronization signal in the sampling signal.
The synchronization signal is used for realizing beam synchronization of the relay device and the host base station. The relay device may receive the synchronization signal while receiving the downlink signal transmitted by the host base station, or may obtain the synchronization signal when acquiring the broadcast signal transmitted by the host base station. The Synchronization Signal may be a Primary Synchronization sequence, a Secondary Synchronization sequence, or a physical broadcast Signal, and optionally, the Synchronization Signal is a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and the physical broadcast Signal together form a Synchronization Signal (SSB).
The signal quality of the synchronization signal may be a signal-to-noise ratio of the synchronization signal or a signal-to-interference ratio of the synchronization signal, which is not limited herein.
Further, the relay device may measure a communication condition between the relay device and the host base station according to the signal quality of the synchronization signal, and determine whether a beam direction of a first antenna module on the relay device, which communicates with the host base station, is in a high-gain operating state.
In the above signal sampling method, the relay device may adjust the beam direction of the first antenna module to a high-gain operating state according to the channel quality of the synchronization signal. When the beam direction of the first antenna module is matched with the antenna beam direction of the host base station, the first antenna module in the relay equipment can be in a high-gain working state, and the relay equipment can effectively receive signals sent by the host base station, amplify the effective signals and send the amplified effective signals to user equipment; in the high-gain operating state, the relay device may also amplify the signal transmitted by the user equipment and transmit the amplified signal to the host base station more efficiently.
Fig. 3 is a flowchart illustrating a signal sampling method in another embodiment, where the embodiment relates to a manner in which a relay device determines a target scanning angle, the radio frequency signal may include radio frequency signals received at a plurality of first scanning angles in a beam scanning range, the sampling signals include sampling signals corresponding to the respective first scanning angles, and the signal quality of the synchronization signal includes the signal quality of the synchronization signal at the respective first scanning angles; on the basis of the above embodiment, as shown in fig. 3, the method further includes:
s201, a target scanning angle is determined among the plurality of first scanning angles based on the signal quality of each synchronization signal.
The relay device may determine the target scanning angle according to the signal quality of the synchronization signal corresponding to each first scanning angle. Specifically, the relay device may match the signal quality of the synchronization signal with a preset signal quality threshold, obtain the signal quality of the synchronization signal that meets a preset condition, and then select a first scanning angle corresponding to the signal quality from the signal qualities that meet the preset condition as a target scanning angle. Optionally, the first scanning angle corresponding to the synchronization signal with the largest signal quality at each first scanning angle is determined as the target scanning angle.
And S202, carrying out signal transmission with the host base station by adopting the target scanning angle.
Further, the relay device may adjust the beam direction of the first antenna module to the target scanning angle, and perform signal transmission with the host base station. The signal transmission may include uplink transmission or downlink transmission. Specifically, in downlink transmission, the relay device may receive a downlink signal sent by the host base station by using a target scanning angle, relay-amplify the downlink signal, and send the downlink signal to the user equipment; in uplink transmission, the relay equipment receives an uplink signal sent by the user equipment and performs relay amplification on the uplink signal; and transmitting the uplink signal after the relay amplification to the host base station by adopting the target scanning angle.
In the signal sampling method, the relay equipment determines the target scanning angle of the antenna module through the signal quality of the synchronous signal, so that the relay equipment can effectively transmit signals with the host base station in a high-gain working state by adopting the target scanning angle; the method and the device avoid the spatial beam interference caused by the fact that the relay device amplifies invalid signals when the beam direction of the relay device is not matched with the beam direction of the host base station; in addition, because the antenna module of the relay equipment can be in a high-gain working state, and a higher-gain antenna and a host base station do not need to be adopted for signal transmission when the wave beams are not matched, the gain requirement on the antenna module is reduced, and the cost of the relay equipment is further reduced.
Fig. 4 is a flowchart of a method for sampling a signal in another embodiment, where this embodiment relates to an implementation manner of filtering a down-converted signal by a relay device, and on the basis of the foregoing embodiment, as shown in fig. 4, the foregoing S103 includes:
s301, determining the center frequency of the filter according to the preset frequency position of the synchronous signal.
The frequency position of the synchronization signal may be preset in the relay device, where the frequency position may be a radio frequency in a radio frequency signal sent by the host base station, for example, frequency fs; the frequency position may also be a relative position of the synchronization signal in a signal bandwidth transmitted by the host base station, for example, the synchronization signal is located in the first 100MHz range in the bandwidth signal; the form of the frequency location is not limited herein.
Further, the relay device may obtain the frequency of the synchronization signal in the down-converted signal according to the frequency position, and determine the center frequency of the filter according to the signal frequency of the synchronization signal in the down-converted signal.
Specifically, the relay device may set the frequency of the synchronization signal in the down-converted signal as the center frequency of the filter, or may determine the frequency as the center frequency of the filter after the synchronization signal is shifted from the frequency in the down-converted signal by a preset frequency; the determination method of the center frequency is not limited herein.
S302, configuring a filtering frequency range of the filter according to the center frequency and the filtering bandwidth.
After the relay device determines the center frequency of the filter, the filtering frequency range of the filter may be configured according to the filtering bandwidth of the filter. E.g., center frequency f0, filter bandwidth 2f, the filter frequency range of the filter may be f0-f to f0+ f. The filtering frequency range can cover the frequency of the synchronous signal in the down-conversion signal.
And S303, filtering the down-conversion signal by adopting a filter corresponding to the filtering frequency range to obtain a narrow-band signal corresponding to the down-conversion signal.
On the basis of the above steps, the relay device may perform filtering processing on the down-converted signal by using a filter to obtain a narrowband signal corresponding to the down-converted signal. The narrowband signal includes a synchronization signal.
According to the signal sampling method, the relay device filters the narrowband signal containing the synchronous signal from the down-conversion signal according to the frequency position of the synchronous signal, so that after the narrowband signal is sampled, the signal quality of the synchronous signal can be obtained through demodulation, the target scanning angle is determined according to the signal quality, and the relay device can be in a high-gain working state to perform signal transmission with the host base station.
Fig. 5 is a flowchart of a method for sampling a signal in another embodiment, where this embodiment relates to an implementation manner of filtering a down-converted signal by a relay device, and on the basis of the foregoing embodiment, as shown in fig. 5, the foregoing S103 includes:
s401, dividing the frequency range of the down-conversion signal into a plurality of sampling frequency intervals which are sequentially arranged; the width of the sampling frequency interval matches the filter bandwidth.
In particular, the relay device may divide the frequency range of the down-converted signal into a plurality of sampling frequency intervals according to the filtering bandwidth of the filter. For example, the filtering bandwidth is 100MHz, the frequency bandwidth of the down-converted signal is 800MHz, and the frequency range can be represented as f1 to f1+800MHz; the sampling frequency intervals corresponding to the down-conversion signals are sequentially arranged as [ f1, f1+100MHz ], [ f1+100MHz, f1+200MHz ], \ 8230; [ f1+700MHz, f1+800MHz ].
S402, configuring a filtering frequency range of the filter based on each sampling frequency interval.
And S403, respectively filtering the down-converted signals through the configured filters to obtain narrow-band signals corresponding to different sampling frequency intervals in the down-converted signals.
The relay device may configure the filtering frequency range of the filter according to the plurality of sampling frequency intervals in sequence, and perform filtering processing on the down-converted signals by using the configured filter to obtain the narrowband signals corresponding to each sampling frequency interval, respectively.
Correspondingly, the S104 may include: and respectively utilizing the sampler to sample each narrowband signal to obtain the sampling signal of each narrowband signal.
Further, the relay device may perform sampling processing on the narrowband signal corresponding to each sampling frequency interval to obtain a sampling signal of the narrowband signal corresponding to each sampling frequency interval.
In the sampling signals of the narrowband signal corresponding to each sampling frequency interval, one of the sampling signals may include a synchronization signal. Further, the relay device may identify a target sampling signal carrying the synchronization signal in the sampling signals of the narrowband signal corresponding to each sampling frequency interval based on a preset signal identifier of the synchronization signal; then, the target sampling signal is demodulated to obtain the signal quality of the synchronization signal.
In the signal sampling method, the relay device polls and samples in each sampling frequency interval in the down-conversion signal under the condition that the frequency position of the synchronous signal is not determined, so that the relay device can obtain the synchronous signal and further obtain the signal quality of the synchronous signal, and determines a target scanning angle according to the signal quality, so that the relay device can perform signal transmission with the host base station under a high-gain working state.
Fig. 6 is a schematic flowchart of a signal sampling method in another embodiment, where this embodiment relates to an implementation manner of a relay device receiving a radio frequency signal, and on the basis of the foregoing embodiment, as shown in fig. 6, the foregoing S101 includes:
s501, performing beam scanning in a preset beam scanning range by adopting a first scanning interval to obtain space signals under a plurality of second scanning angles; the beam scanning range comprises a plurality of scanning intervals; the second scanning angle corresponds to the scanning interval one by one.
The relay device can perform secondary beam scanning within a preset beam scanning range to obtain radio frequency signals at each scanning angle. First, the relay device may perform a primary scan using the first scan interval to obtain spatial signals at a plurality of second scan angles. The spatial signal is a signal received by the relay device, and may include a radio frequency signal sent by the host base station, or may not be scanned by the radio frequency signal. The range of the first scanning interval is large, so that the relay device can realize coarse scanning, and the approximate beam direction of the radio frequency signal is determined after the first-stage beam scanning. For example, the beam scanning range is 30 degrees to 120 degrees, the first scanning interval may be 30 degrees, the scanning angles may be adjusted to 30 degrees, 60 degrees, 90 degrees, and 120 degrees, respectively, and the spatial signals may be acquired at the above four second scanning angles.
The beam scanning range comprises a plurality of scanning intervals; the second scanning angles correspond to the scanning intervals one by one, and the relay device can determine which scanning interval the radio frequency signal is in according to the radio frequency signal of each second scanning angle.
And S502, respectively carrying out level detection on the space signals corresponding to the plurality of second scanning angles to obtain signal receiving levels corresponding to the second scanning angles.
After obtaining the spatial signals corresponding to the second scanning angle, the relay device may use an analog level detection device to perform level detection on each spatial signal, respectively, to obtain a signal receiving level of each spatial signal.
Specifically, the relay device may directly detect the reception level of the received spatial signal, or may detect the spatial signal after processing the spatial signal, which is not limited herein.
Optionally, the relay device may perform down-conversion processing on the spatial signals corresponding to each second scanning angle, respectively, to obtain intermediate frequency signals at each second scanning angle; and respectively carrying out level detection on the intermediate frequency signals under each second scanning angle to obtain signal receiving levels corresponding to each second scanning angle. After the relay device performs down-conversion processing on the spatial signal, a low-frequency analog level detection device can be used for detecting the intermediate-frequency signal to obtain a signal receiving level. Generally, the device cost of the analog level detection device increases with the increase of the frequency, and the cost of the analog level detection device can be reduced through the down-conversion processing, so that the cost of the relay device is further reduced.
S503, selecting a candidate scanning angle from the plurality of second scanning angles according to the signal receiving level, and determining a scanning interval corresponding to the candidate scanning angle as a target scanning interval.
On the basis of obtaining the signal reception levels corresponding to the respective second scanning angles, the relay device may select a candidate scanning angle among the plurality of second scanning angles according to the signal reception levels. Alternatively, the relay device may determine the second scan angle corresponding to the maximum reception level among the signal reception levels as the candidate scan angle. The relay device may consider that the level of the received spatial signal is the largest at the second scanning angle, and therefore the second scanning angle is closest to the beam angle of the rf signal of the host base station.
After determining the candidate scan angle, the relay device may determine a scan interval corresponding to the candidate scan angle as the target scan interval.
S504, beam scanning is carried out in a target scanning interval by adopting a second scanning interval, and radio frequency signals received at each first scanning angle are obtained; the second scanning interval is smaller than the first scanning interval.
After the relay device determines the target scanning interval, the relay device may perform accurate beam scanning in the target scanning interval by using a second scanning interval to obtain radio frequency signals of each first scanning angle in the target scanning interval, and further determine an accurate target scanning angle according to the radio frequency signals at each first scanning angle.
According to the signal sampling method, the relay device scans through the secondary beam, so that the number of sampled signals can be reduced, and the signal processing resources of the relay device are saved; furthermore, through secondary beam scanning, the determination efficiency of the target scanning angle can be improved, so that the beam direction of the relay equipment can be quickly matched with the beam direction of the host base station, and the signal transmission performance of the relay equipment is improved.
In one embodiment, the relay device further includes a coupler, where the coupler is connected to a port of the first antenna module, and after receiving the radio frequency signal, the relay device may perform coupling processing on the radio frequency signal received at the first scanning angle to obtain a radio frequency coupling signal; and then, carrying out down-conversion processing on the radio frequency coupling signal to obtain down-conversion signals under each first scanning angle.
In the signal sampling method, the relay device couples part of the radio frequency signals from the radio frequency signals, and then performs down-conversion and other processing on the radio frequency coupled signals, so that the relay device affects the time delay of signals transmitted between the relay device and the host base station in the beam alignment process, and the effect of transparent relay is achieved.
It should be understood that although the various steps in the flow diagrams of fig. 2-6 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 2-6 may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed in turn or alternately with other steps or at least some of the other steps.
In one embodiment, as shown in fig. 7, there is provided a signal sampling apparatus comprising: receiving module 10, frequency conversion module 20, filtering module 30 and sampling module 40, wherein:
a receiving module 10, configured to receive a radio frequency signal sent by a host base station within a preset beam scanning range;
a frequency conversion module 20, configured to perform down-conversion processing on a radio frequency signal received at a first scanning angle in a beam scanning range, so as to obtain a down-conversion signal at the first scanning angle;
the filtering module 30 is configured to perform filtering processing on the down-conversion signal by using a filter to obtain a narrow-band signal corresponding to the down-conversion signal; the filtering bandwidth of the filter is smaller than the bandwidth of the down-conversion signal;
the sampling module 40 is configured to perform sampling processing on the narrowband signal by using a sampler to obtain a sampling signal of the narrowband signal; wherein the sampling bandwidth of the sampler is adapted to the filtering bandwidth of the filter and is smaller than the bandwidth of the down-converted signal.
In one embodiment, on the basis of the above embodiment, as shown in fig. 8, the apparatus further includes a demodulation module 50, configured to: and demodulating the sampling signal to acquire the signal quality of the synchronous signal in the sampling signal.
In one embodiment, on the basis of the above embodiment, the radio frequency signal includes a radio frequency signal received at a plurality of first scanning angles in a beam scanning range, the sampling signal includes a sampling signal corresponding to each first scanning angle, and the signal quality of the synchronization signal includes a signal quality of the synchronization signal at each first scanning angle, as shown in fig. 9, the apparatus further includes a determining module 60 configured to: determining a target scanning angle among a plurality of first scanning angles based on the signal quality of each synchronization signal; and carrying out signal transmission with the host base station by adopting the target scanning angle.
In one embodiment, on the basis of the above embodiment, as shown in fig. 10, the filtering module 30 includes:
a determining unit 301 for determining a filtering bandwidth of the filter based on the sampling bandwidth of the sampler;
the filtering unit 302 is configured to perform filtering processing on the down-converted signal by using a filtering bandwidth to obtain a narrowband signal corresponding to the down-converted signal.
In one embodiment, on the basis of the foregoing embodiment, the filtering unit 302 is specifically configured to: determining the center frequency of the filter according to the preset frequency position of the synchronous signal; configuring a filtering frequency range of the filter according to the center frequency and the filtering bandwidth; and filtering the down-conversion signal by adopting a filter corresponding to the filtering frequency range to obtain a narrow-band signal corresponding to the down-conversion signal.
In one embodiment, on the basis of the foregoing embodiment, the filtering unit 302 is specifically configured to: dividing the frequency range of the down-conversion signal into a plurality of sampling frequency intervals which are sequentially arranged; the width of the sampling frequency interval is matched with the filtering bandwidth; respectively configuring a filtering frequency range of the filter based on each sampling frequency interval; and respectively filtering the down-conversion signals through the configured filters to obtain narrow-band signals corresponding to different sampling frequency intervals in the down-conversion signals.
Correspondingly, the sampling module 40 is specifically configured to: and respectively utilizing the sampler to sample each narrow-band signal to obtain the sampling signal of each narrow-band signal.
In one embodiment, on the basis of the above embodiment, the demodulation module 50 is specifically configured to: identifying a target sampling signal carrying a synchronous signal in the sampling signals of the narrow-band signals corresponding to each sampling frequency interval based on a preset signal identification of the synchronous signal; and demodulating the target sampling signal to obtain the signal quality of the synchronous signal.
In one embodiment, based on the above-mentioned embodiment, as shown in fig. 11, the beam scanning range includes a plurality of scanning intervals, and the receiving module 10 includes:
a first scanning unit 101, configured to perform beam scanning within a preset beam scanning range by using a first scanning interval, and acquire spatial signals at multiple second scanning angles; the beam scanning range comprises a plurality of scanning intervals; the second scanning angle corresponds to the scanning interval one by one;
a detecting unit 102, configured to perform level detection on the spatial signals corresponding to the multiple second scanning angles, respectively, to obtain signal receiving levels corresponding to the second scanning angles;
a selecting unit 103, configured to select a candidate scanning angle from the multiple second scanning angles according to the signal receiving level, and determine a scanning interval corresponding to the candidate scanning angle as a target scanning interval;
the second scanning unit 104 is configured to perform beam scanning in a target scanning interval at a second scanning interval to obtain radio frequency signals received at each first scanning angle; the second scanning interval is smaller than the first scanning interval.
In one embodiment, on the basis of the above embodiment, the detecting unit 102 is specifically configured to: respectively carrying out down-conversion processing on the space signals corresponding to each second scanning angle to obtain intermediate frequency signals under each second scanning angle; and respectively carrying out level detection on the intermediate frequency signals under each second scanning angle to obtain signal receiving levels corresponding to each second scanning angle.
In one embodiment, on the basis of the above embodiment, the selecting unit 103 is specifically configured to: and determining a second scanning angle corresponding to the maximum receiving level in the signal receiving levels as a candidate scanning angle.
In one embodiment, on the basis of the above embodiment, the determining module 60 is specifically configured to: and determining the first scanning angle corresponding to the synchronous signal with the maximum signal quality at each first scanning angle as the target scanning angle.
In one embodiment, on the basis of the above embodiment, the determining module 60 is specifically configured to: in downlink transmission, a target scanning angle is adopted to receive a downlink signal sent by a host base station, and the downlink signal is subjected to relay amplification and then sent to user equipment; in uplink transmission, receiving an uplink signal sent by user equipment, and performing relay amplification on the uplink signal; and transmitting the uplink signal after the relay amplification to the host base station by adopting the target scanning angle.
In one embodiment, on the basis of the above embodiment, as shown in fig. 12, the frequency conversion module 20 includes:
a coupling unit 201, configured to perform coupling processing on a radio frequency signal received at a first scanning angle to obtain a radio frequency coupling signal;
the processing unit 202 is configured to perform down-conversion processing on the radio frequency coupled signal to obtain a down-converted signal at a first scanning angle.
The sampling apparatus for the signal provided above can implement the embodiment of the sampling method for the signal, and the implementation principle and technical effect are similar, and are not described herein again.
For the specific definition of the signal sampling device, reference may be made to the above definition of the signal sampling method, which is not described herein again. The various modules in the above signal sampling apparatus may be implemented in whole or in part by software, hardware, and combinations thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, there is provided a relay device, as shown in fig. 13, the relay device including a receiver, a sampler, a filter, and a processor:
the receiver is used for receiving the radio frequency signal sent by the host base station in a preset beam scanning range;
the processor is used for carrying out down-conversion processing on the radio frequency signal received under a first scanning angle in a beam scanning range to obtain a down-conversion signal under the first scanning angle;
the filter is used for filtering the down-conversion signal to obtain a narrow-band signal corresponding to the down-conversion signal; the filtering bandwidth of the filter is smaller than the bandwidth of the down-conversion signal;
the sampler is used for sampling the narrowband signal to obtain a sampling signal of the narrowband signal; wherein the sampling bandwidth of the sampler is adapted to the filtering bandwidth of the filter and is smaller than the bandwidth of the down-converted signal.
It will be appreciated by those skilled in the art that the configuration shown in fig. 13 is a block diagram of only a portion of the configuration associated with the present application, and is not intended to limit the computing device to which the present application may be applied, and that a particular computing device may include more or fewer components than shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a relay device is provided, the internal structure of which may be as shown in fig. 14. The relay device includes a processor, a memory, and a network interface connected by a system bus. Wherein the processor of the relay device is configured to provide computational and control capabilities. The memory of the relay device includes a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operating system and the computer program to run on the non-volatile storage medium. The database of the relay device is used to store sampled data of the signal. The network interface of the relay device is used for communicating with an external terminal through network connection. The computer program is executed by a processor to implement a method of sampling a signal.
In an embodiment, a computer-readable storage medium is provided, on which a computer program is stored which, when being executed by a processor, carries out the steps of the above-mentioned method embodiments.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (16)
1. A method for sampling a signal, adapted for use in a relay device, said relay device comprising a sampler and a filter; the method comprises the following steps:
receiving a radio frequency signal sent by a host base station in a preset beam scanning range;
performing down-conversion processing on the radio frequency signal received under a first scanning angle in the beam scanning range to obtain a down-conversion signal under the first scanning angle;
filtering the down-conversion signal by using the filter to obtain a narrow-band signal corresponding to the down-conversion signal; the filter bandwidth of the filter is smaller than the bandwidth of the down-conversion signal;
sampling the narrowband signal by using the sampler to obtain a sampling signal of the narrowband signal; wherein a sampling bandwidth of the sampler is adapted to a filtering bandwidth of the filter and is smaller than a bandwidth of the down-converted signal.
2. The method for sampling a signal according to claim 1, wherein the radio frequency signal comprises a synchronization signal, the method further comprising:
and demodulating the sampling signal to acquire the signal quality of the synchronous signal in the sampling signal.
3. The method for sampling a signal according to claim 2, wherein the radio frequency signal comprises radio frequency signals received at a plurality of first scan angles in the beam scan range, the sampled signals comprise sampled signals corresponding to the respective first scan angles, and the signal quality of the synchronization signal comprises the signal quality of the synchronization signal at the respective first scan angles; the method further comprises the following steps:
determining a target scan angle among the plurality of first scan angles based on a signal quality of each of the synchronization signals;
and performing signal transmission with the host base station by adopting the target scanning angle.
4. The method for sampling a signal according to claim 2 or 3, wherein the filtering the down-converted signal by the filter to obtain a narrow-band signal corresponding to the down-converted signal comprises:
determining a filtering bandwidth of the filter based on a sampling bandwidth of the sampler;
and filtering the down-conversion signal by adopting the filtering bandwidth to obtain a narrow-band signal corresponding to the down-conversion signal.
5. The method for sampling a signal according to claim 4, wherein the filtering the down-converted signal with the filtering bandwidth to obtain a narrowband signal corresponding to the down-converted signal includes:
determining the center frequency of the filter according to the preset frequency position of the synchronous signal;
configuring a filtering frequency range of the filter according to the center frequency and the filtering bandwidth; and filtering the down-conversion signal by adopting a filter corresponding to the filtering frequency range to obtain a narrow-band signal corresponding to the down-conversion signal.
6. The method for sampling a signal according to claim 4, wherein the filtering the down-converted signal with the filtering bandwidth to obtain a narrowband signal corresponding to the down-converted signal includes:
dividing the frequency range of the down-conversion signal into a plurality of sampling frequency intervals which are sequentially arranged; the width of the sampling frequency interval is matched with the filtering bandwidth;
configuring a filtering frequency range of the filter based on each sampling frequency interval;
and respectively filtering the down-conversion signals through the configured filters to obtain narrow-band signals corresponding to different sampling frequency intervals in the down-conversion signals.
7. The method for sampling a signal according to claim 6, wherein the demodulating the sampled signal to obtain the signal quality of the synchronization signal in the sampled signal comprises:
identifying a target sampling signal carrying a synchronization signal in the sampling signals of the narrow-band signals corresponding to each sampling frequency interval based on a preset signal identification of the synchronization signal;
and demodulating the target sampling signal to obtain the signal quality of the synchronous signal.
8. A method of sampling a signal according to claim 3, wherein the beam scanning range comprises a plurality of scanning intervals; the receiving of the radio frequency signal sent by the host base station within the preset beam scanning range includes:
performing beam scanning within a preset beam scanning range by adopting a first scanning interval to obtain space signals under a plurality of second scanning angles; the second scanning angles correspond to the scanning intervals one by one;
respectively carrying out level detection on the space signals corresponding to the plurality of second scanning angles to obtain signal receiving levels corresponding to the second scanning angles;
selecting a candidate scanning angle from the plurality of second scanning angles according to the signal receiving level, and determining a scanning interval corresponding to the candidate scanning angle as a target scanning interval;
performing beam scanning in the target scanning interval by adopting a second scanning interval to obtain the radio-frequency signals received at each first scanning angle; the second scan interval is less than the first scan interval.
9. The method for sampling a signal according to claim 8, wherein the performing level detection on the spatial signals corresponding to the plurality of second scanning angles to obtain the signal reception levels corresponding to the respective second scanning angles comprises:
respectively carrying out down-conversion processing on the space signals corresponding to each second scanning angle to obtain intermediate frequency signals under each second scanning angle;
and respectively carrying out level detection on the intermediate frequency signals under each second scanning angle to obtain signal receiving levels corresponding to each second scanning angle.
10. The method for sampling a signal according to claim 8, wherein selecting a candidate scan angle among the plurality of second scan angles according to the signal reception level comprises:
and determining a second scanning angle corresponding to the maximum receiving level in the signal receiving levels as a candidate scanning angle.
11. The method for sampling a signal according to claim 3, wherein the determining a target scan angle in each of the first scan angles based on the signal quality of each of the synchronization signals comprises:
and determining the first scanning angle corresponding to the synchronous signal with the maximum signal quality at each first scanning angle as the target scanning angle.
12. The method for sampling the signal according to claim 3, wherein the employing the target scanning angle for signal transmission with the host base station comprises:
in downlink transmission, receiving a downlink signal sent by the host base station by adopting the target scanning angle, and sending the downlink signal to user equipment after relay amplification;
in uplink transmission, receiving an uplink signal sent by user equipment, and performing relay amplification on the uplink signal; and sending the uplink signal after the relay amplification to the host base station by adopting the target scanning angle.
13. The method for sampling a signal according to any one of claims 1 to 3, wherein the down-converting the radio frequency signal received at a first scan angle in the beam scanning range to obtain a down-converted signal at the first scan angle comprises:
coupling processing is carried out on the radio frequency signals received under the first scanning angle, and radio frequency coupling signals are obtained;
and performing down-conversion processing on the radio frequency coupling signal to obtain a down-conversion signal under the first scanning angle.
14. An apparatus for sampling a signal, the apparatus being provided in a relay device, the relay device comprising a sampler and a filter, comprising:
the receiving module is used for receiving the radio frequency signal sent by the host base station in a preset beam scanning range;
the frequency conversion module is used for performing down-conversion processing on the radio frequency signal received under a first scanning angle in the beam scanning range to obtain a down-conversion signal under the first scanning angle;
the filtering module is used for filtering the down-conversion signal by using the filter to obtain a narrow-band signal corresponding to the down-conversion signal; the filtering bandwidth of the filter is smaller than the bandwidth of the down-conversion signal;
the sampling module is used for sampling the narrowband signal by using the sampler to obtain a sampling signal of the narrowband signal; wherein the sampling bandwidth of the sampler is adapted to the filtering bandwidth of the filter and is smaller than the bandwidth of the down-converted signal.
15. A relay device, characterized in that the relay device comprises a receiver, a transmitter, a sampler, a filter and a processor:
the receiver is used for receiving the radio frequency signal sent by the host base station in a preset beam scanning range;
the processor is configured to perform down-conversion processing on the radio frequency signal received at a first scanning angle in the beam scanning range to obtain a down-conversion signal at the first scanning angle;
the filter is used for filtering the down-conversion signal to obtain a narrow-band signal corresponding to the down-conversion signal; the filtering bandwidth of the filter is smaller than the bandwidth of the down-conversion signal;
the sampler is used for sampling the narrowband signal to obtain a sampling signal of the narrowband signal; wherein a sampling bandwidth of the sampler is adapted to a filtering bandwidth of the filter and is smaller than a bandwidth of the down-converted signal.
16. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 13.
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