WO2023070632A1

WO2023070632A1 - Frequency-selective filtering circuit, receiver and frequency-selection filtering method

Info

Publication number: WO2023070632A1
Application number: PCT/CN2021/127782
Authority: WO
Inventors: 吴杰; 潘明; 邓伟; 刘权; 蹇轩旭
Original assignee: 上海华为技术有限公司
Priority date: 2021-10-30
Filing date: 2021-10-30
Publication date: 2023-05-04

Abstract

The present application provides a frequency-selective filtering circuit, a receiver and a frequency-selection filtering method, which are used for quickly selecting available signals in a frequency band, thereby realizing rapid station building or rapid service recovery. The present application provides a frequency-selective filtering circuit, comprising a processor, a full-pass frequency selection channel, a working frequency selection channel, and a selection switch. The processor controls the selection switch to select to be in communication with the full-pass frequency selection channel or the working frequency selection channel. The full-pass frequency selection channel is used for receiving a full-band signal and collecting spectrum information. The processor is used for determining a working frequency point and the working bandwidth of the working frequency selection channel according to the spectrum information. The working frequency selection channel is used for carrying out frequency-selective filtering according to the working frequency point and the working bandwidth.

Description

A frequency selection filter circuit, receiver and frequency selection filter method

technical field

The present application relates to the communication field, and in particular to a frequency selection filter circuit, a receiver and a frequency selection filter method.

Background technique

The wireless network has developed into the commercial period of the 5th Generation Mobile Communication Technology (5G), so that the "Internet of Things" has gradually moved from concept to every aspect of life. With the development of the Internet of Things, the demand for wireless connections is getting higher and higher, so whether it is millimeter wave, Sub-6G or Wireless Fidelity (Wireless Fidelity, WIFI) devices are deployed in large numbers in enterprises, shopping malls, homes and other corners.

The 2.4G/5G currently used by WIFI belongs to the free (unlicense) frequency band, and it is also the main frequency band for small microwave wireless backhaul to be applied to 5G and future 6G enterprise park backhaul, community backhaul and other business scenarios. However, due to the limited spectrum resources in the unlicense frequency band, with high-density deployment, there will be more and more interference signals, which will become more and more complex.

Therefore, how to quickly build a station, or quickly avoid interference signals when there are interference signals, and select the best available signal in the frequency band will be the competitiveness of future products.

Contents of the invention

The present application provides a frequency selection filter circuit, a receiver and a frequency selection filter method, which are used to quickly select available signals in a frequency band, thereby realizing rapid station establishment or rapid service restoration.

The first aspect of the present application provides a frequency selection filter circuit, including: a processor, an all-pass frequency selection channel, a working frequency selection channel, and a selection switch; the processor controls the selection switch to connect to the all-pass frequency selection channel or the working frequency-selecting channel; the all-pass frequency-selecting channel is used to receive full-band signals and collect spectrum information; the processor is used to determine the working frequency of the working frequency-selecting channel according to the spectrum information point and working bandwidth; the working frequency-selective channel is used to perform frequency-selective filtering according to the working frequency point and the working bandwidth.

In the technical solution provided by this embodiment, the frequency-selective filter channel selects the all-pass frequency-selective channel or the working frequency-selective channel to work through the selection switch. When the all-pass frequency-selective channel is selected, the all-pass frequency-selective channel quickly performs full frequency scanning and determine the available operating frequency points and available operating bandwidth in the full-frequency signal through the processor, and then configure the available operating frequency points and available operating bandwidth to the working frequency selection channel; finally when selecting the working frequency selection channel, The working frequency selection channel utilizes the available working frequency point and available working bandwidth to perform frequency selective filtering. Since the all-pass frequency-selective channel can perform full-frequency scanning quickly, the speed of site construction can be improved. At the same time, when the signal of the working frequency-selective channel is interfered, signal switching can be realized at high speed, thereby restoring business at high speed.

Optionally, in this application, the implementation of the all-pass frequency-selective channel may be a capacitor or an all-pass filter, as long as the function of receiving full-frequency signals can be realized, which is not specifically limited here. For example, if the frequency selection filter channel works in the 2.4G frequency band, the specification of the all-pass filter needs to be capable of receiving full-frequency signals in the 2.4G frequency band.

Optionally, in this application, the structure of the all-pass frequency-selective channel and the working frequency-selective channel can have multiple possible implementations, as follows:

In a possible implementation manner, the all-pass frequency selection channel is independent from the working frequency selection channel. Specifically, the working frequency selection channel includes a first frequency converter, a first switch filter bank, a second frequency converter and a local oscillator frequency synthesizer; the selection switch includes a first switch and a second switch; wherein, the first frequency conversion The first switch filter group and the second frequency converter are connected in turn; the local oscillator frequency is connected to the first frequency converter and the second frequency converter; the first switch selects and connects the all-pass The frequency selection channel or the first frequency converter; the second switch selectively connects to the all-pass frequency selection channel or the second frequency converter.

Based on the above solution, in order to achieve better reception of signals, the frequency selection filter circuit also includes a low noise amplifier, which is located between the first frequency converter and the first switch filter bank, and is used to convert the The signal output by the first frequency converter is amplified and output to the first switch filter bank.

In another possible implementation manner, the all-pass frequency selection channel is integrated with the working frequency selection channel. Specifically, the working frequency-selective channel includes a first frequency converter, a second switch filter bank, a second frequency converter, and a local oscillator frequency synthesizer; the all-pass frequency-selective channel includes the first frequency converter, bypass circuit, the second frequency converter, and the local frequency converter; the selector switch is a fourth switch; wherein, the local frequency converter is connected to the first frequency converter and the second frequency converter; The fourth switch selectively communicates with the bypass circuit or the second switch filter bank. That is, the all-pass frequency selection channel and the working frequency selection channel multiplex the first frequency converter, the second frequency converter and the local oscillator frequency synthesizer, and then select and connect the bypass circuit or the second frequency converter through the fourth switch. The first filter or the second filter or the third filter in the filter bank is switched.

Based on the above solution, in order to achieve better signal reception, the frequency selection filter circuit also includes a low noise amplifier; the first frequency converter, the low noise amplifier and the second switch filter bank or the bypass The low-noise amplifier is used to amplify the signal output by the first frequency converter and output it to the second switch filter bank or the bypass circuit.

Optionally, based on practical applications, the working bandwidth of the filter in the above scheme can be set as follows: the working bandwidth of the first filter is 20 Mbit, the working bandwidth of the second filter is 40 Mbit, and the working bandwidth of the second filter is 40 Mbit. The operating bandwidth of the three filters is 80 megabytes. It can be understood that, according to different working scenarios of the frequency selective filter, the working bandwidth of each filter can be set differently, as long as the working requirements can be met, and there is no specific limitation here.

In a second aspect, the present application provides a receiver, which includes the frequency selection filter circuit described in any one of the first aspect.

In the third aspect, the present application provides a frequency selection filtering method, which is applied to the receiver described in the second aspect, specifically including: when the interference value of the current working channel of the working frequency selection channel of the receiver reaches a preset threshold , the receiver switches to the all-pass frequency-selective channel; then the receiver negotiates with the peer device to determine the first operating frequency point and the second a working bandwidth, and configure the first working frequency point and the first working bandwidth to the working frequency selection channel; finally the receiver switches to the working frequency selection channel, and the receiver switches to the working frequency selection channel according to the first Frequency selective filtering is performed on the working frequency point and the first working bandwidth.

In the technical solution provided by this embodiment, the frequency-selective filter channel selects the all-pass frequency-selective channel or the working frequency-selective channel to work through the selection switch. When the all-pass frequency-selective channel is selected, the all-pass frequency-selective channel quickly performs full frequency scanning and determine the available operating frequency points and available operating bandwidth in the full-frequency signal through the processor, and then configure the available operating frequency points and available operating bandwidth to the working frequency selection channel; finally when selecting the working frequency selection channel, The working frequency selection channel utilizes the available working frequency point and available working bandwidth to perform frequency selective filtering. Since the all-pass frequency-selective channel can quickly perform full-frequency scanning, when the signal of the working frequency-selective channel is interfered, signal switching can be implemented at high speed, thereby restoring services at high speed.

Optionally, when the receiver is initially powered on, the receiver chooses to connect to the all-pass frequency selection channel and configures an initial operating frequency point and an initial operating bandwidth for the working frequency selection channel; The spectrum information collected by the frequency channel determines the second working frequency point and the second working bandwidth of the working frequency-selecting channel; the receiver switches the initial working frequency point of the working frequency-selecting channel to the second working frequency point, and the initial The working bandwidth is switched to the second working bandwidth; finally, the receiver switches to the working frequency-selective channel, and performs frequency-selective filtering according to the second working frequency point and the second working bandwidth.

Optionally, in this application, after the interference value of the current working channel reaches a threshold, the receiver negotiates with the peer device to determine the first working channel of the working frequency-selecting channel according to the spectrum information collected by the all-pass frequency-selecting channel. There can be multiple ways of frequency point and first working bandwidth, including the following possible implementation ways:

In a possible implementation manner, the receiver determines a third operating frequency point and a third operating bandwidth according to the spectrum information collected by the all-pass frequency-selective channel; then the receiver determines the third operating frequency point and the third operating bandwidth sent to the peer device, the peer device switches its current working frequency to the third working frequency, and switches its current working bandwidth to the third working bandwidth; at this time, the third working frequency As the working frequency point, the third working bandwidth is used as the first working bandwidth. In this way, the receiver, as the master device, can directly control the peer device and its own working frequency and working bandwidth, and quickly realize the switching of the working frequency and working bandwidth, thereby realizing rapid service recovery.

In another possible implementation manner, the receiver sends the spectrum information collected by the all-pass frequency-selective channel to the peer device; the receiver receives the spectrum information collected by the peer device according to the all-pass frequency-selection channel. The fourth working frequency point and the fourth working bandwidth determined by the spectrum information; the receiver configures the fourth working frequency point and the fourth working bandwidth to the working frequency selection channel, and the fourth working frequency point and the fourth working bandwidth as the first working frequency point and the first working bandwidth.

In a fourth aspect, the present application provides a receiver, which has a function of implementing the behavior of the receiver in the third aspect above. This function may be implemented by hardware, or may be implemented by executing corresponding software on the hardware. The hardware or software includes one or more modules corresponding to the above functions.

In a possible implementation manner, the receiver includes: a processor and a transceiver, where the processor is configured to support the receiver to perform corresponding functions in the method provided in the foregoing first aspect. The transceiver is used to instruct the communication between the receiver and the peer device, and send the data and information involved in the above method to the peer device. Optionally, the device may further include a memory, which is used to be coupled with the processor, and stores necessary program instructions and data of the receiver.

Among them, the processor mentioned in any of the above can be a general-purpose central processing unit (Central Processing Unit, CPU), a microprocessor, a specific application integrated circuit (application-specific integrated circuit, ASIC), or one or more An integrated circuit for controlling the program execution of the data transmission method in the above aspects.

In a fifth aspect, the embodiments of the present application provide a computer-readable storage medium, where the computer storage medium stores computer instructions, and the computer instructions are used to execute the method described in any possible implementation manner of any one of the above-mentioned aspects.

In a sixth aspect, the embodiments of the present application provide a computer program product including instructions, which, when run on a computer, cause the computer to execute the method described in any one of the above aspects.

In a seventh aspect, the present application provides a system-on-a-chip, where the system-on-a-chip includes a processor, configured to support a receiver to implement the functions involved in the above aspect, such as generating or processing the data and/or information involved in the above method. In a possible design, the system-on-a-chip further includes a memory, and the memory is used for storing necessary program instructions and data of the receiver, so as to realize functions in any one of the above-mentioned aspects. The system-on-a-chip may consist of chips, or may include chips and other discrete devices.

In an eighth aspect, an embodiment of the present application provides a communication system, where the system includes the receiver of the above aspect.

Description of drawings

Fig. 1 is the schematic diagram of an embodiment of the frequency selection filter circuit in the embodiment of the present application;

FIG. 2 is a schematic diagram of another embodiment of the frequency selection filter circuit in the embodiment of the present application;

FIG. 3 is a schematic diagram of another embodiment of the frequency selection filter circuit in the embodiment of the present application;

FIG. 4 is a schematic diagram of another embodiment of the frequency selection filter circuit in the embodiment of the present application;

FIG. 5 is a schematic diagram of another embodiment of the frequency selection filter circuit in the embodiment of the present application;

FIG. 6 is a schematic diagram of another embodiment of the frequency selection filter circuit in the embodiment of the present application;

FIG. 7 is a schematic diagram of another embodiment of the frequency selection filter circuit in the embodiment of the present application;

FIG. 8 is a schematic diagram of an embodiment of a switch filter bank in an embodiment of the present application;

FIG. 9 is a schematic diagram of an embodiment of the integration of the switch filter bank and the all-pass frequency selection channel in the embodiment of the present application;

FIG. 10 is a schematic diagram of an embodiment of the receiver in the embodiment of the present application;

FIG. 11 is a schematic diagram of the workflow when the receiver is powered on (i.e., building a station) in the embodiment of the present application;

FIG. 12 is a schematic diagram of a workflow of a receiver when channel interference exceeds a preset threshold and a service is re-accessed in an embodiment of the present application.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present application clearer, the embodiments of the present application will be described below in conjunction with the accompanying drawings. Apparently, the described embodiments are only part of the present application, rather than all of them. . Those skilled in the art know that, with the emergence of new application scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

The terms "first", "second" and the like in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device comprising a series of steps or modules is not necessarily limited to the expressly listed Instead, other steps or modules not explicitly listed or inherent to the process, method, product or apparatus may be included. The naming or numbering of the steps in this application does not mean that the steps in the method flow must be executed in the time/logic sequence indicated by the naming or numbering. The execution order of the technical purpose is changed, as long as the same or similar technical effect can be achieved. The division of units presented in this application is a logical division. In actual application, there may be other division methods. For example, multiple units can be combined or integrated in another system, or some features can be ignored. , or not, in addition, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, and the indirect coupling or communication connection between units may be electrical or other similar forms, this Applications are not limited. Moreover, the units or subunits described as separate components may or may not be physically separated, may or may not be physical units, or may be distributed into multiple circuit units, and some or all of them may be selected according to actual needs unit to realize the purpose of the application scheme.

The wireless network has developed into the commercial period of the 5th Generation Mobile Communication Technology (5G), so that the "Internet of Things" has gradually moved from concept to every aspect of life. With the development of the Internet of Things, the demand for wireless connections is getting higher and higher, so whether it is millimeter wave, Sub-6G or Wireless Fidelity (Wireless Fidelity, WIFI) devices are deployed in large numbers in enterprises, shopping malls, homes and other corners. The 2.4G/5G currently used by WIFI belongs to the free (unlicense) frequency band, and it is also the main frequency band for small microwave wireless backhaul to be applied to 5G and future 6G enterprise park backhaul, community backhaul and other business scenarios. However, due to the limited spectrum resources in the unlicense frequency band, with high-density deployment, there will be more and more interference signals, which will become more and more complicated. Therefore, how to quickly build a station, or quickly avoid interference signals when there are interference signals, and select the best available signal in the frequency band will be the competitiveness of future products.

In order to solve this problem, as shown in Figure 1, the present application provides a frequency selection filter circuit 100, which specifically includes: a processor 101, an all-pass frequency selection channel 102, a working frequency selection channel 103, and a selection switch 104; The processor 101 controls the selection switch 104 to select and connect the all-pass frequency-selective channel 102 or the working frequency-selective channel 103; the all-pass frequency-selective channel 102 is used to receive full-band signals and collect spectrum information; the The processor 101 is configured to determine the working frequency point and working bandwidth of the working frequency selection channel according to the spectrum information; the working frequency selection channel 103 is used to perform frequency selection according to the working frequency point and the working bandwidth filtering.

In this application, the implementation of the all-pass frequency-selective channel may be a capacitor or an all-pass filter, as long as the function of receiving full-frequency signals can be realized, which is not specifically limited here. For example, if the frequency selection filter channel works in the 2.4G frequency band, the specification of the all-pass filter needs to be capable of receiving full-frequency signals in the 2.4G frequency band. In this application, the implementation of the all-pass frequency-selective channel is described as a capacitor.

In this embodiment, the structure of the all-pass frequency-selective channel 102 and the working frequency-selective channel 103 can have multiple possible implementations, as follows:

In a possible implementation manner, as shown in FIG. 2 , the all-pass frequency selection channel 102 is independent from the working frequency selection channel 103 . Specifically, the working frequency selection channel 103 includes a first frequency converter 1031, a first switch filter bank 1032, a second frequency converter 1033 and a local oscillator frequency synthesis 1034; the selection switch 104 includes a first switch 1041 and a second switch 1042; wherein, the first frequency converter 1031, the first switching filter bank 1032 and the second frequency converter 1033 are sequentially connected; the local oscillator frequency synthesis 1034 is connected to the first frequency converter 1031 and the second frequency conversion The first switch 1041 selects to communicate with the all-pass frequency-selective channel 102 or the first frequency converter 1031; the second switch 1042 selects to communicate with the all-pass frequency-selective channel 102 or the second Inverter 1033.

In another possible implementation manner, as shown in FIG. 3 , the all-pass frequency selection channel 102 is integrated with the working frequency selection channel 103 . Specifically, the working frequency-selective channel 103 includes a first frequency converter 105, a second switch filter bank 106, a second frequency converter 107, and a local oscillator frequency synthesizer 108; the all-pass frequency-selective channel 102 includes the first A frequency converter 105, a bypass circuit 109, the second frequency converter 107 and the local frequency synthesis 108; the selection switch 104 is a fourth switch 1043; wherein, the local frequency synthesis 108 and the first frequency synthesis A frequency converter 105 is connected to the second frequency converter 107 ; the fourth switch 1043 selectively connects to the bypass circuit 109 or the second switch filter bank 106 . That is, the all-pass frequency selection channel 102 and the working frequency selection channel 103 multiplex the first frequency converter 105, the second frequency converter 107 and the local oscillator frequency synthesis 108, and then select and connect the side frequency converter 104 through the fourth switch 1043. circuit 109 or the second switch filter bank 106.

In this embodiment, in order to achieve better signal reception, the frequency selection filter circuit 100 also includes a low noise amplifier 110; as shown in Figure 4, it is located before the working frequency selection channel 103; or as shown in Figure 5 , which is located before the working frequency-selecting channel 103 and the all-pass frequency-selecting channel 102 .

In a possible implementation manner, in combination with the frequency-selective filter circuit shown in FIG. 2 , after the low-noise amplifier 110 is added, the frequency-selective filter circuit 100 may be as shown in FIG. 6 . The first frequency converter 1031 , the low noise amplifier 110 and the first switch filter bank 1032 are connected in sequence.

In another possible implementation manner, in combination with the frequency-selective filter circuit shown in FIG. 3 , after the low-noise amplifier 110 is added, the frequency-selective filter circuit 100 may be as shown in FIG. 7 . The first frequency converter 105 is connected to the low noise amplifier 110 , and the low noise amplifier 110 is connected to the second switch filter bank 106 or the all-pass selection channel 102 through a fourth switch 1043 .

Optionally, based on practical applications, the switch filter bank in the above solution may be as shown in FIG. 8 , which includes a first filter, a second filter and a third filter. The working bandwidth of each filter can be set as follows: the working bandwidth of the first filter is 20 Mbit, the working bandwidth of the second filter is 40 Mbit, and the working bandwidth of the third filter is 80 Mbit. It can be understood that, according to different working scenarios of the frequency selective filter, the working bandwidth of each filter can be set differently, as long as the working requirements can be met, and there is no specific limitation here. According to different application scenarios, the number of filters in the switch filter bank may also be different. It can be understood that the switched filter bank is connected to other devices through selection switches. When the switched filter bank and the all-pass frequency-selective channel are integrated in parallel, the selection switch of the switched filter bank can reuse the fourth switch. Its specific structure can be shown in FIG. 9 .

Based on the frequency-selective filter circuit described above, the receiver including the frequency-selective filter circuit can be shown in Figure 10, wherein the receiver includes a baseband processing unit, an analog-to-digital converter (Analog-to-Digital Converter, ADC), Digital-to-Analog Converter (DAC), transmit filter bank, transmit power amplifier, multiplexer, antenna, receive low-noise amplifier, and the frequency-selective filter circuit. Among them, the DAC, transmitting filter bank, transmitting power amplifier, multiplexer, and antenna are sequentially connected to form a transmitting circuit; the antenna, receiving low-noise amplifier, the frequency selection filter circuit and the ADC are sequentially connected to form a receiving circuit; the baseband processing The unit controls the connection direction of each selection switch in the frequency selection filter circuit and performs related information processing according to the frequency spectrum information.

Based on the above description of the frequency-selective filter circuit and the receiver, the following describes the working process of the frequency-selective filter circuit or the receiver.

Combined with the frequency selection filter circuit shown in Figure 2, the working process of the receiver when it is powered on (that is, the station is built) is shown in Figure 11:

The receiver controls the first switch and the second switch to connect to the all-pass frequency-selective channel, so that the receiver works in the all-pass frequency-selective channel; at the same time, the initial operating frequency and initial working frequency of the working frequency-selective channel can also be set. Bandwidth, that is, the receiver sets the initial operating frequency of the local oscillator and the initial operating bandwidth in the first switch filter; the all-pass frequency-selective channel receives full-frequency signals and collects spectrum information; then the receiver The baseband processing unit in the receiver The baseband processing unit in the receiver determines the optimal working channel of the receiver according to the spectrum information collected by the all-pass frequency selection channel, so as to obtain the optimal working frequency point and working bandwidth. In this embodiment, the receiver detects the spectrum information collected by the all-pass frequency-selective channel and determines that an unoccupied channel or a channel whose channel interference (including relative power signal and signal-to-noise ratio) is less than a preset threshold is an optional working channel , and then select the channel with the least channel interference or a channel that is completely unoccupied as the most estimated working channel. Then the receiver switches the initial operating frequency of the local oscillator to the optimal operating frequency, and switches the initial operating bandwidth of the first switch filter to the optimal operating bandwidth. Finally, the receiver controls the first switch and the second switch to connect to the working frequency-selective channel, and receives signals at the optimal working frequency point and optimal working bandwidth and performs frequency-selective filtering.

Combined with the frequency selection filter circuit shown in Figure 2, the workflow of the receiver when the channel interference exceeds the preset threshold and the service is re-accessed is shown in Figure 12:

When the receiver detects that the channel interference of the current working channel exceeds the preset threshold, the receiver controls the first switch and the second switch to connect to the all-pass frequency-selective channel, so that the receiver works in the all-pass frequency-selective channel ; The all-pass frequency-selective channel receives full-frequency signals and collects spectrum information; then the baseband processing unit in the receiver negotiates with the opposite end device to determine the optimal working channel, so as to obtain the optimal working frequency and working bandwidth. Then the receiver switches the current operating frequency of the local oscillator to the optimal operating frequency, and switches the current operating bandwidth of the first switch filter to the optimal operating bandwidth. Finally, the receiver controls the first switch and the second switch to connect to the working frequency-selective channel, and receives signals at the optimal working frequency point and optimal working bandwidth and performs frequency-selective filtering.

In this embodiment, when the receiver negotiates the optimal operating frequency point and the optimal operating bandwidth with the peer device, the following methods may be used specifically:

In this embodiment, in a possible implementation manner, the receiver determines the third operating frequency point and the third operating bandwidth according to the spectrum information collected by the all-pass frequency-selective channel; then the receiver determines the third operating frequency point and the third operating bandwidth The third working bandwidth is sent to the peer device, and the peer device switches its current working frequency to the third working frequency, and switches its current working bandwidth to the third working bandwidth; at this time, the The third working frequency is used as the working frequency, and the third working bandwidth is used as the first working bandwidth. In this way, the receiver, as the master device, can directly control the peer device and its own working frequency and working bandwidth, and quickly realize the switching of the working frequency and working bandwidth, thereby realizing rapid service recovery.

The receiver provided by the embodiment of the present application can be applied to various communication systems, such as: Global System of Mobile Communication (GSM) system, Code Division Multiple Access (CDMA) system, wideband code division Multiple Access (Wideband Code Division Multiple Access, WCDMA) system, Long Term Evolution (Long Term Evolution, LTE) system, LTE Frequency Division Duplex (Frequency Division Duplex, FDD) system, LTE Time Division Duplex (Time Division Duplex, TDD), Universal Mobile Telecommunication System (UMTS), 5G communication system, and future wireless communication system, etc.

In this application, the receiver may be user equipment or network equipment. Among them, user equipment (User Equipment, UE) can also refer to terminal equipment, access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device. The access terminal can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, vehicle devices, wearable devices, terminal devices in 5G networks or terminal devices in future evolved PLMN networks, etc. The network device may be a device for communicating with user equipment, for example, it may be a base station (Base Transceiver Station, BTS) in the GSM system or CDMA, or a base station (NodeB, NB) in the WCDMA system, or it may be The evolved base station (Evolutional Node B, eNB or eNodeB) in the LTE system, or the network device can be a relay station, an access point, a vehicle device, a wearable device, and a network side device in a 5G network or a future evolved public land mobile Network equipment in the network (Public Land Mobile Network, PLMN), etc.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

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

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

If the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or part of the contribution to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disc, etc., which can store program codes. .

As mentioned above, the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still understand the foregoing The technical solutions described in each embodiment are modified, or some of the technical features are replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the various embodiments of the application.

Claims

A frequency selective filter circuit, characterized in that it comprises:

Processor, all-pass frequency selection channel, working frequency selection channel, selection switch;

The processor controls the selection switch to connect to the all-pass frequency selection channel or the working frequency selection channel;

The all-pass frequency-selective channel is used to receive full-band signals and collect spectrum information;

The processor is configured to determine the working frequency point and working bandwidth of the working frequency selection channel according to the spectrum information;

The working frequency-selective channel is used to perform frequency-selective filtering according to the working frequency point and the working bandwidth.
The frequency-selective filter circuit according to claim 1, wherein the working frequency-selective channel includes a first frequency converter, a first switch filter bank, a second frequency converter, and a local oscillator frequency synthesizer;

The selection switch includes a first switch and a second switch;

Wherein, the first frequency converter, the first switching filter bank and the second frequency converter are connected in sequence;

The local oscillator is connected to the first frequency converter and the second frequency converter;

The first switch selectively communicates with the all-pass frequency-selective channel or the first frequency converter;

The second switch selectively communicates with the all-pass frequency-selective channel or the second frequency converter.
The frequency-selective filter circuit according to claim 2, wherein the frequency-selective filter circuit further comprises a low-noise amplifier;

The first frequency converter, the low-noise amplifier and the first switch filter bank are sequentially connected;

The low noise amplifier is used to amplify the signal output by the first frequency converter and output it to the first switch filter bank.
The frequency-selective filter circuit according to claim 2 or 3, wherein the first switch filter bank includes a third switch, and a first filter, a second filter and a third filter connected in parallel, so The third switch selectively communicates with the first filter, the second filter or the third filter.
The frequency-selective filter circuit according to claim 1, wherein the working frequency-selective channel includes a first frequency converter, a second switch filter bank, a second frequency converter and a local oscillator frequency synthesizer;

The all-pass frequency selection channel includes the first frequency converter, a bypass circuit, the second frequency converter and the local oscillator frequency synthesizer;

The selection switch is a fourth switch;

Wherein, the local oscillator frequency synthesizer is connected with the first frequency converter and the second frequency converter;

The fourth switch selectively communicates with the bypass circuit or the second switch filter bank.
The frequency-selective filter circuit according to claim 5, wherein the second switch filter bank includes a parallel first filter, a second filter, and a third filter; the second switch filter bank integrated with the bypass circuit in parallel;

The fourth switch selectively communicates with the first filter, the second filter, the third filter or the bypass circuit.
The frequency-selective filter circuit according to claim 5 or 6, wherein the frequency-selective filter circuit further comprises a low-noise amplifier;

The first frequency converter, the low-noise amplifier are sequentially connected to the second switch filter bank or the bypass circuit;

The low-noise amplifier is used to amplify the signal output by the first frequency converter, and output it to the second switching filter bank or the bypass circuit.
The frequency selection filter circuit according to claim 4 or 6, characterized in that, the working bandwidth of the first filter is 20 megabytes, the working bandwidth of the second filter is 40 megabytes, and the working bandwidth of the third filter is The working bandwidth is 80 megabytes.
The frequency-selective filter circuit according to any one of claims 1 to 8, wherein the all-pass frequency-selective channel comprises a capacitor or an all-pass filter.
A receiver, characterized by comprising the frequency selection filter circuit described in any one of claims 1 to 9 above.
A frequency-selective filtering method, applied to a receiver comprising the frequency-selective filter circuit described in any one of claims 1 to 9, characterized in that it comprises:

When the interference value of the current working channel of the working frequency-selecting channel reaches a preset threshold, the receiver switches to the all-pass frequency-selecting channel;

The receiver negotiates with the peer device to determine the first working frequency point and the first working bandwidth of the working frequency-selecting channel according to the spectrum information collected by the all-pass frequency-selecting channel, and sets the first working frequency point and the first working bandwidth The first working bandwidth is allocated to the working frequency selection channel;

The receiver switches to the working frequency-selective channel, and the receiver performs frequency-selective filtering according to the first working frequency point and the first working bandwidth.
The method according to claim 11, characterized in that the method further comprises:

When the receiver is powered on, the receiver switches to an all-pass frequency-selective channel and configures the initial operating frequency and initial operating bandwidth of the working frequency-selective channel;

The receiver determines a second operating frequency point and a second operating bandwidth of the working frequency-selecting channel according to the spectrum information collected by the all-pass frequency-selecting channel;

The receiver switches the initial working frequency point to the second working frequency point, and switches the initial working bandwidth to the second working bandwidth;

The receiver switches to the working frequency-selective channel, and the receiver performs frequency-selective filtering according to the second working frequency point and the second working bandwidth.
The method according to claim 11 or 12, wherein the receiver negotiates with the peer device to determine the first operating frequency point and The first working bandwidth includes:

The receiver determines a third operating frequency point and a third operating bandwidth according to the spectrum information collected by the all-pass frequency-selective channel;

The receiver configures the third operating frequency point and the third operating bandwidth to the peer device, and the third operating frequency point and the third operating bandwidth are used as the first operating frequency point and the third operating bandwidth The first working bandwidth.
The method according to claim 11 or 12, wherein the receiver negotiates with the peer device to determine the first operating frequency point and The first working bandwidth includes:

The receiver sends the spectrum information collected by the all-pass frequency selection channel to the peer device;

The receiver receives the fourth operating frequency point and the fourth operating bandwidth determined by the peer device according to the spectrum information collected by the all-pass frequency selection channel;

The receiver configures the fourth working frequency point and the fourth working bandwidth to the working frequency selection channel, and the fourth working frequency point and the fourth working bandwidth are used as the first working frequency point and the first working bandwidth.
A computing storage medium, characterized in that it includes a program, and when the program is run on a computer, the computer is made to execute the method according to any one of claims 11 to 14.
A chip system, characterized in that the chip system includes one or more processors and memory, and program instructions are stored in the memory, and when the program instructions are executed in the one or more processors, causing the method of any one of claims 11 to 14 to be performed.
A communication system, characterized by comprising the receiver according to claim 10 above, and the receiver includes the frequency selection filter circuit according to any one of claims 1 to 9 above.