Signal gain control method, receiver and related device

Abstract

Provided in an embodiment of the present application are a signal gain control method, a receiver and a related device, the method comprising: determining a signal of a target frequency band from received signals of N frequency bands, N being a positive integer greater than or equal to 1, and the signal of the target frequency band being a signal having a level greater than a preset threshold or having interference; before the signal of the target frequency band and the signals of other frequency bands are combined, gain control is carried out on the signal of the target frequency band according to a control signal, a gained signal is obtained, and the control signal is a preset external control signal or is determined according to the signal of the target frequency band; and performing automatic gain control and linear control on the combined signal, the combined signal including the gained signal of the target frequency band and the signals except the target frequency band in the N frequency bands. According to the embodiment of the invention, normal work of other frequency bands is not affected by signals with relatively high levels or signals with interference in a single frequency band.

Description

Signal gain control method, receiver and related device Technical Field

[0001] The present application relates to the field of communications, and in particular to a signal gain control method, a receiver, and related devices. Background Art

[0002] In radio frequency communication systems, signal reception must be able to handle the widest range of data conversions, due to factors such as obstacles and air effects. For this reason, typical radio frequency system front-ends typically employ automatic gain control (AGC). This ensures that the output signal amplitude remains stable or within a narrow range even when the input signal amplitude varies significantly.

[0003] A multi-band receiver with AGC can simultaneously receive signals from multiple frequency bands. Before automatically gain controlling the signals, they are typically combined and converted to analog-to-digital (A / D) to reduce the number of RF channels. The converted signals are then processed through peak power detection, mean power detection, and digital down conversion (DDC). If a frequency band receives a large signal or has strong interference, the combined signal may affect the reception performance of other bands.

[0004] Summary of the Invention

[0005] The embodiments of the present application provide a signal gain control method, a receiver, and related devices, which can ensure that frequency bands with large signal levels or interference signals do not affect the normal operation of other frequency bands.

[0006] In a first aspect, an embodiment of the present application provides a signal gain control method, comprising:

[0007] Determining a signal of a target frequency band from signals of N received frequency bands, where N is a positive integer greater than or equal to 1, and the signal of the target frequency band is a signal having a level greater than a preset threshold;

[0008] Before combining the signal of the target frequency band with the signals of other frequency bands, performing gain control on the signal of the target frequency band according to a control signal to obtain a gained signal, wherein the control signal is a preset external control signal or a control signal determined according to the signal of the target frequency band;

[0009] Automatic gain control is performed on the combined signal, wherein the combined signal includes the gained signal of the target frequency band and signals of the N frequency bands excluding the target frequency band.

[0010] In this embodiment, before combining the target frequency band signal with signals from other frequency bands, gain control is performed on the target frequency band signal to reduce the signal or interference level in the target frequency band to a reasonable level, thereby not affecting the normal operation of other frequency bands. Furthermore, after combining the signals from multiple frequency bands, certain modules can be reused to the greatest extent possible, thereby reducing power consumption and costs.

[0011] In a possible implementation manner of the first aspect, the step of performing gain control on the signal of the target frequency band according to the control signal to obtain a gained signal includes:

[0012] Performing branching processing on a signal in a target frequency band to obtain a first signal and a second signal, wherein the frequency band of the first signal and the second signal is the target frequency band;

[0013] performing delay processing on the first signal to obtain a signal with a first time delay;

[0014] determining a control signal according to the second signal, wherein the control signal has a second delay, and the second delay is smaller than the first delay;

[0015] Before the signal of the target frequency band is combined with the signals of other frequency bands, the signal with the first delay is gain controlled according to the control signal to obtain a gained signal; further, the gained signal is a signal whose signal level is less than the preset threshold.

[0016] It can be seen that the embodiment of the present application only delays the first signal, so the first signal can be considered as a signal of the target frequency band with a first delay. Because the second delay of the control signal is smaller than the first delay, the signal of the target frequency band can be gain controlled according to the control signal. The signal of the target frequency band is amplified or attenuated to an appropriate level after gain control.

[0017] In a possible implementation of the first aspect, determining the control signal according to the second signal includes:

[0018] performing envelope detection processing on the second signal to obtain a signal representing a power level of the target frequency band signal;

[0019] The signal representing the power level of the target frequency band signal is compared with a preset reference signal to determine the control signal.

[0020] It can be seen that the control signal determined in the embodiment of the present application is determined based on the properties of the signal of the target frequency band itself. Therefore, the gain of the signal of the target frequency band can be better controlled, thereby eliminating interference with other frequency bands.

[0021] In a possible implementation of the first aspect, the control signal is an analog signal or a digital signal, which is selected based on actual needs and usage scenarios.

[0022] In a possible implementation manner of the first aspect, the control signal includes multiple digital signals, and performing gain control on the signal with the first delay according to the control signal to obtain a gained signal includes:

[0023] determining a target digital signal from the plurality of digital signals according to a preset level requirement;

[0024] Performing gain control on the signal with the first time delay according to the target digital signal to obtain a gained signal, wherein the gained signal meets the preset level requirement.

[0025] It is understandable that each digital signal corresponds to a gain control. Therefore, the corresponding digital signal can be selected for gain control according to actual needs, thereby improving efficiency and reducing cost and power consumption.

[0026] In a possible implementation manner of the first aspect, after determining a control signal based on the second signal, and a delay of the control signal being less than a delay of the RF delay signal, the method further includes:

[0027] The control signal is sent to one or more devices that process the target frequency band, and the one or more devices are used to perform gain control on the signal of the target frequency band received by the one or more devices according to the control signal, and the control signal received by the one or more devices has a third delay, and the sum of the second delay and the third delay is less than the first delay.

[0028] As can be seen, in a multi-channel scenario, each channel generally receives signals in the target frequency band. However, one or more channels can be selected to generate control signals in the target frequency band and then send them to the other channels. This eliminates the need to generate control signals for each channel, thus saving costs.

[0029] In a second aspect, an embodiment of the present application provides a receiver, wherein the receiver includes a filter, a real-time feedforward automatic gain control module and a broadband automatic gain control module, wherein:

[0030] The filter is configured to determine a signal of a target frequency band from signals of N received frequency bands, where N is a positive integer greater than or equal to 1, and the signal of the target frequency band is a signal whose level is greater than a preset threshold;

[0031] The real-time feedforward automatic gain control module is configured to perform gain control on the signal of the target frequency band according to a control signal to obtain the signal of the target frequency band after gain, wherein the control signal is a preset external control signal or a control signal determined according to the signal of the target frequency band;

[0032] The broadband automatic gain control module is used to perform automatic gain control on the combined signal, wherein the combined signal includes the gained signal of the target frequency band and the signals of the N frequency bands excluding the target frequency band.

[0033] In a possible implementation of the second aspect, the real-time feedforward automatic gain control module is further used to perform branching processing on the signal of the target frequency band to obtain a first signal and a second signal, and the frequency band of the first signal and the second signal is the target frequency band.

[0034] In a possible implementation of the second aspect, the filter is further configured to perform branching processing on the signal of the target frequency band to obtain a first signal and a second signal, and the frequency bands of the first signal and the second signal are the target frequency band.

[0035] In a possible implementation of the second aspect, the first signal obtained after the filter performs branching processing has a first delay.

[0036] It can be seen that the embodiment of the present application can provide a first delay for the first signal through a filter.

[0037] In a possible implementation manner of the second aspect, the real-time feedforward automatic gain control module is further configured to perform delay processing on the first signal to obtain a signal with a first time delay.

[0038] In a possible implementation of the second aspect, the real-time feedforward automatic gain control module is specifically configured to:

[0039] determining a control signal according to the second signal, wherein the control signal has a second delay, and the second delay is smaller than the first delay;

[0040] The signal with the first time delay is gain-controlled according to the control signal to obtain a gained signal; further, the gained signal is a signal whose signal level is less than the preset threshold.

[0041] In a possible implementation of the second aspect, the real-time feedforward automatic gain control module is specifically configured to: perform envelope detection processing on the second signal to obtain a signal representing a power level of the target frequency band signal;

[0042] The signal representing the power level of the target frequency band signal is compared with a preset reference signal to determine the control signal.

[0043] In a possible implementation of the second aspect, the control signal is an analog signal or a digital signal.

[0044] In a possible implementation manner of the second aspect, the control signal includes multiple digital signals, and the real-time feedforward automatic gain control module is specifically configured to:

[0045] Determining a target digital signal from the multiple digital signals according to preset requirements;

[0046] Performing gain control on the signal with the first time delay according to the target digital signal to obtain a gained signal, wherein the gained signal meets the preset requirement.

[0047] In a possible implementation of the second aspect, the device further includes a control signal distribution module, which is used to send the control signal to one or more devices that process the target frequency band, and the one or more devices are used to perform gain control on the signal of the target frequency band according to the control signal. The control signal received by the first or more devices has a third delay, and the sum of the second delay and the third delay is less than the first delay.

[0048] In the third aspect, an embodiment of the present application provides a terminal device, which may include modules or units corresponding to the methods / operations / steps / actions described in the first aspect. The modules or units may be hardware circuits, software, or a combination of hardware circuits and software.

[0049] In a fourth aspect, an embodiment of the present application provides a network device, which terminal device may include a module or unit corresponding to each of the methods / operations / steps / actions described in the first aspect. The module or unit may be a hardware circuit, software, or a combination of hardware circuit and software.

[0050] In a fifth aspect, an embodiment of the present application provides a communication device, which includes a processor, and the processor is used to execute instructions stored in a memory or run a logic circuit so that the communication device implements the method described in any one of the first aspects above.

[0051] In a possible implementation, the communication device further includes a communication interface, where the communication interface is used to receive and / or send data, and / or the communication interface is used to provide input and / or output for the processor.

[0052] In one possible implementation, the communication device further includes a memory for storing at least one of an instruction, a configuration file of a logic circuit, and data. Optionally, the processor and the memory may be integrated into one device.

[0053] The above embodiments are described using a processor (or general-purpose processor) that executes a method by calling a computer instruction. In specific implementations, the processor may also be a dedicated processor, in which case the computer instructions are pre-loaded into the processor. Alternatively, the processor may include both a dedicated processor and a general-purpose processor.

[0054] In a sixth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores instructions, and when the instructions are executed on at least one processor, the method described in any one of the first aspects above is implemented.

[0055] In a seventh aspect, the present application provides a computer program product, which includes computer instructions. When the instructions are executed on at least one processor, the method described in any one of the first aspects is implemented.

[0056] Optionally, the computer program product may be a software installation package or an image package. When the aforementioned method is required, the computer program product may be downloaded and executed on a computing device.

[0057] In the eighth aspect, the present application provides a chip system, which includes at least one processor, a memory and an interface circuit, the memory, the interface circuit and the at least one processor are interconnected through lines, and a computer program is stored in the at least one memory; when the computer program is executed by the processor, the method described in any one of the above-mentioned first aspects is implemented.

[0058] In a ninth aspect, the present application provides a communication system, comprising the receiver described in the second aspect.

[0059] The beneficial effects of the technical solutions provided in the second to ninth aspects of this application can refer to the beneficial effects of the technical solution in the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] FIG1A is a schematic diagram of the architecture of a multi-frequency multi-splicing digital feedback receiver provided in an embodiment of the present application;

[0061] FIG1B is a schematic diagram of the architecture of a multi-frequency broadband digital feedback receiver provided in an embodiment of the present application;

[0062] FIG2 is a schematic diagram of the architecture of a receiver 200 provided in an embodiment of the present application;

[0063] FIG3 is a schematic diagram of the architecture of another receiver 200 provided in an embodiment of the present application;

[0064] FIG4A is a schematic diagram of an embodiment of the present application in which a control signal is an analog signal;

[0065] FIG4B is a schematic diagram of a control signal provided by an embodiment of the present application that is a digital signal;

[0066] FIG4C is a schematic diagram of another embodiment of the present application in which the control signal is a digital signal;

[0067] FIG5 is a schematic diagram of the architecture of another single-channel multi-frequency receiver 300 provided in an embodiment of the present application;

[0068] FIG6 is a schematic diagram of the architecture of another single-channel multi-frequency receiver 400 provided in an embodiment of the present application;

[0069] FIG7 is a schematic diagram of the architecture of a single-channel dual-frequency receiver 500 provided in an embodiment of the present application;

[0070] FIG8 is a schematic diagram of the architecture of another single-channel dual-frequency receiver 600 provided in an embodiment of the present application;

[0071] FIG9 is a schematic diagram of the architecture of yet another single-channel dual-frequency receiver 700 provided in an embodiment of the present application;

[0072] FIG10 is a schematic diagram of the architecture of a multi-channel multi-frequency receiver 800 provided in an embodiment of the present application;

[0073] FIG11 is a schematic diagram of the architecture of another multi-channel multi-frequency receiver 900 provided in an embodiment of the present application;

[0074] FIG12 is a schematic diagram of the architecture of yet another multi-channel multi-frequency receiver 1000 provided in an embodiment of the present application;

[0075] FIG13 is a flow chart of a signal gain control method provided in an embodiment of the present application;

[0076] FIG14 is a schematic structural diagram of a communication device 140 provided in an embodiment of the present application. DETAILED DESCRIPTION

[0077] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0078] For ease of understanding, the following examples provide some explanations of concepts related to the embodiments of the present application for reference.

[0079] 1. A single-frequency receiver refers to a receiver technology that can only receive signals in a specific frequency band.

[0080] 2. A multi-band receiver refers to receiver technology that can simultaneously receive signals from multiple frequency bands, each of which must operate independently. Common examples include dual-band receivers, which can receive signals from two frequency bands simultaneously, and tri-band receivers, which can receive signals from three frequency bands simultaneously.

[0081] A key technology in multi-frequency receivers is the multiplexing filter, which must simultaneously filter signals from multiple frequency bands. In a multi-frequency receiver architecture that uses active components and analog-to-digital converters (ADCs) across multiple frequency bands, the filter also needs to combine and perform broadband sampling on the filtered signals.

[0082] 3. Automatic gain control (AGC) uses an effective combination of linear amplification and compression amplification to adjust the output signal. It can stabilize the output signal amplitude or limit its variation to a very small range when the input signal amplitude varies significantly. This prevents the receiver from malfunctioning due to too small an input signal, nor from saturation or blocking due to too large an input signal.

[0083] The receiver's output signal depends on the input signal and the receiver's gain. For various reasons, the receiver's input signal often varies widely, ranging from a microvolt or tens of microvolts for weak signals to hundreds of millivolts for strong signals. The difference between the strongest and weakest signals can reach tens of decibels. This range is called the receiver's dynamic range.

[0084] There are many factors that affect the receiver input signal, such as: the power of the transmitter, the distance between the receiver and the transmitter, changes in the propagation conditions of the signal during propagation (such as turbulence in the ionosphere and troposphere, weather changes), changes in the receiver environment (such as the receiver equipped in a car), and the impact of man-made noise and interference signals on the receiver.

[0085] To prevent overload caused by strong signals and increase the dynamic range of the receiver, an AGC circuit can provide this function. The AGC circuit can automatically adjust the gain of the amplifier circuit according to the signal strength. It can keep the output signal amplitude constant or vary within a small range even when the input signal amplitude varies greatly. This prevents the receiver from malfunctioning due to too small an input signal, nor does it cause saturation or blockage due to too large an input signal.

[0086] Automatic gain control can be broadly categorized into two types: feedback-based automatic gain control (FB-AGC) and feed-forward-based automatic gain control (FF-AGC). FB-AGC detects signal levels after the gain control module, and gain control lags behind signal level changes. FF-AGC detects signal levels before the gain control module, and gain control precedes signal level changes.

[0087] 4. Envelope detection is a vibration signal processing method based on filter detection that can provide amplitude information of the original modulated signal. Envelope detection connects the peak points of a high-frequency signal over a period of time to obtain an upper (positive) line and a lower (negative) line. These two lines can be called envelopes. The envelope can reflect the curve of the amplitude change of the high-frequency signal. For high-frequency signals of equal amplitude, these two envelopes are parallel lines. When a low-frequency signal is used to amplitude-modulate a high-frequency signal (also known as amplitude modulation), the low-frequency signal can be the envelope of the high-frequency signal.

[0088] 5. Low-noise amplifiers (LNAs), also known as amplifiers with very low noise figures, are commonly used as high-frequency or intermediate-frequency preamplifiers in various radio receivers, as well as amplifier circuits in highly sensitive electronic detection equipment. They amplify signals while suppressing noise interference, thereby improving system sensitivity. If a high-performance LNA is connected to the front end of a receiver, and the low-noise amplifier gain is sufficiently large, it can suppress the noise of subsequent circuits. The noise figure of the entire receiver will then be primarily determined by the noise of the amplifier. Lowering the LNA's noise figure also reduces the receiver's noise figure, improving the signal-to-noise ratio and, therefore, increasing receiver sensitivity.

[0089] 6. Analog-to-digital converter (ADC), also known as A / D converter, usually refers to an electronic component that converts an analog signal into a digital signal.

[0090] The function of A / D conversion is to convert analog signals that are continuous in time and amplitude into digital signals that are discrete in time and amplitude.

[0091] 7. Digital down conversion (DDC) refers to a mixing method in which the intermediate frequency signal obtained after mixing in the receiver is lower in frequency than the original signal.

[0092] In a receiver, if the resulting intermediate frequency (IF) signal is lower in frequency than the original signal after mixing, this mixing method is called downconversion. The RF signal is converted to an IF through one or more analog downconversion steps, digitized at the IF, and then digitally downconverted again.

[0093] 8. Automatic gain control (LIN) linearization is the process of reversing the gain adjustment performed by the AGC. For example, if the AGC reduces the receiver gain by an amount a, LIN increases the signal level by a factor of a. Linearization is typically performed after analog-to-digital conversion, ensuring that subsequent digital signal processing modules see the receiver gain as unchanged.

[0094] The technical solution provided in this application can be applied to various communication systems, such as the fifth generation (5G) mobile communication systems such as the long term evolution (LTE) system, the LTE frequency division duplex (FDD) system, the LTE time division duplex (TDD) system, and the new radio (NR), as well as systems evolved after 5G such as the sixth generation (6G) mobile communication system and the communication perception integrated system.

[0095] The technical solution provided in this application can also be applied to machine type communication (MTC), long term evolution-machine (LTE-M), device-to-device (D2D) network, machine-to-machine (M2M) network, Internet of Things (IoT) network or other networks. Among them, the IoT network may include, for example, the Internet of Vehicles. Among them, the communication methods in the Internet of Vehicles system are collectively referred to as vehicle to other devices (vehicle to X, V2X, X can represent anything), for example, the V2X may include: vehicle to vehicle (V2V) communication, vehicle to infrastructure (V2I) communication, vehicle to pedestrian (V2P) communication or vehicle to network (V2N) communication, etc. The V2X communication system is a sidelink (SL) transmission technology based on D2D communication.

[0096] In one possible implementation, the signal gain control method, receiver, and related apparatus provided in the embodiments of the present application can be applied to a terminal device. Furthermore, the terminal device includes a device that provides voice and / or data connectivity to a user. For example, it may include a processing device connected to a wireless modem. The terminal device can communicate with a core network via a radio access network (RAN), exchanging voice or data with the RAN, or interacting with the RAN for voice and data.The terminal device may include a handheld terminal, a notebook computer, a subscriber unit, a cellular phone, a smart phone, a wireless data card, a personal digital assistant (PDA) computer, a tablet computer, a handheld computer, a wireless modem, a handheld device, a laptop computer, a cordless phone or a wireless local loop (WLL) station, a machine type communication (MTC) terminal, a wearable device (such as a smart watch, a smart bracelet, a pedometer, etc.), an in-vehicle device (such as a car, a bicycle, an electric car, an airplane, a ship, a train, a high-speed rail, etc.), a vehicle to everything (V2X) terminal device, a machine-to-machine / machine-type communications (M2M / MTC) terminal device, an Internet of Things (IoT) terminal device, a light terminal device (light UE), a reduced capability UE (REDCAP UE), a smart point of sale (point of Sales (POS) machines, customer-premises equipment (CPE), mobile internet devices (MID), virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, smart home devices (such as refrigerators, TVs, air conditioners, and electricity meters), intelligent robots, workshop equipment, wireless terminals in self-driving cars, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, flying equipment (such as intelligent robots, hot air balloons, drones, and airplanes), and other devices that can access the Internet.

[0097] In the embodiments of the present application, the device for implementing the function of the terminal device can be a terminal device, or a device capable of supporting the terminal device to implement the function, such as a chip system, which can be installed in the terminal device. In the embodiments of the present application, the chip system can be composed of a chip, or it can include a chip and other discrete devices. In the technical solutions provided in the embodiments of the present application, the technical solutions provided in the embodiments of the present application are described by taking the terminal device as an example in which the device for implementing the function of the terminal is a terminal device.

[0098] In another possible implementation, the signal gain control method, receiver, and related apparatus provided in the embodiments of the present application can be applied to network devices. Furthermore, network devices, nodes in a radio access network (RAN), can also be referred to as access network devices, or RAN nodes (or devices). Network device 101 is used to help terminals achieve wireless access. Multiple network devices 101 in communication system 1000 can be nodes of the same type or different types.

[0099] In one possible scenario, a network device may be a base station, an evolved NodeB (eNodeB), an access point (AP), a transmission reception point (TRP), a next-generation NodeB (gNB), a base station in a 6G mobile communication system, a base station in a future mobile communication system, an access node in a satellite or WiFi system, an integrated access and backhaul (IAB) node, a transmitting point (TP), a mobile switching center, or a device that performs base station functions in D2D, V2X, M2M, or drone communications. A network device may be a macro base station, a micro base station, an indoor station, a relay node or a donor node, or a wireless controller in a CRAN scenario. A network device may also be a device that performs base station functions in device-to-device (D2D) communications, Internet of Vehicles (IoV) communications, drone communications, or machine communications. Optionally, a network device may be a server, a wearable device, a vehicle, or an onboard device. For example, the access network device in vehicle to everything (V2X) technology may be a road side unit (RSU).

[0100] In another possible scenario, multiple network devices collaborate to assist the terminal in achieving wireless access, and different network devices respectively implement part of the functions of the base station. For example, the network device can be a centralized unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU). The CU and DU can be set separately, or can also be included in the same network element, such as a baseband unit (BBU). The RU can be included in a radio frequency device or a radio frequency unit, such as a remote radio unit (RRU), an active antenna unit (AAU), or a remote radio head (RRH). It can be understood that the network device can be a CU node, a DU node, or a device including a CU node and a DU node. In addition, the CU can be divided into a network device in the access network RAN, or the CU can be divided into a network device in the core network CN, which is not limited here.

[0101] In different systems, CU (or CU-CP and CU-UP), DU or RU may also have different names, but those skilled in the art can understand their meanings. For example, in the ORAN system, CU may also be called O-CU (Open CU), DU may also be called O-DU, CU-CP may also be called O-CU-CP, CU-UP may also be called O-CU-UP, and RU may also be called O-RU. For the convenience of description, this application uses CU, CU-CP, CU-UP, DU and RU as examples for description. Any unit of CU (or CU-CP, CU-UP), DU and RU in this application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0102] The network equipment may also include core network equipment, which refers to equipment in the core network (CN) that provides service support for terminal equipment. The core network equipment may be an access and mobility management function (AMF) network element, a session management function (SMF) network element, a user plane function (UPF) network element, etc., which are not listed here one by one. The AMF network element may be responsible for access management and mobility management of terminal equipment. The SMF network element may be responsible for session management, such as user session establishment. The UPF network element may be a functional entity of the user plane, mainly responsible for connecting to the external network. It should be noted that in this application, network elements may also be referred to as entities or functional entities. For example, the AMF network element may also be referred to as an AMF entity or an AMF functional entity. For another example, the SMF network element may also be referred to as an SMF entity or an SMF functional entity, etc.

[0103] In the embodiment of the present application, the device for implementing the function of the network device can be a network device, or a device capable of supporting the network device to implement the function, such as a chip system, which can be installed in the network device. In the technical solution provided in the embodiment of the present application, it is used to implement.

[0104] Please refer to Figure 1A, which is a schematic diagram of the architecture of a multi-frequency multi-splicing digital feedback receiver provided in an embodiment of the present application. As can be seen from Figure 1A, the multi-frequency multi-splicing digital feedback receiver 101 can allocate an independent receiving channel to each frequency band after the multiplexer 1012. That is, the multiplexing interface in the multiplexer 1012 can receive the multi-band signal from the antenna 1011, and the filter in the multiplexer 1012 can filter the multi-band signal, and then output the signal of the corresponding frequency band to the corresponding receiving channel of the multi-frequency multi-splicing digital feedback receiver 101, and process the signal separately in the corresponding receiving channel. Taking the signal of frequency band 1 as an example, the receiver 101 adopts the FB-AGC method, and performs AGC control on the signal of frequency band 1 through LNA, gain control module, ADC, and AGC. Finally, the baseband data of frequency band 1 can be obtained through LIN and DDC. The receiver 101 shown in Figure 1A can realize independent operation between frequency bands.

[0105] Please refer to Figure 1B, which is a schematic diagram of the architecture of a multi-frequency, wideband digital feedback receiver provided in an embodiment of the present application. Figure 1B (a) shows the architecture of receiver 102 without a wideband gain control module, while Figure 1B (b) shows the architecture of receiver 103 with a wideband gain module. As can be seen from Figure 1B, receivers 102 and 103 allow for the sharing of wideband LNAs, wideband gain control, wideband ADCs, and peak power detection modules across multiple frequencies, reducing hardware cost and power consumption.

[0106] As can be seen from FIG1A , when receiving multi-band signals, if the receiver 101 provides a separate receiving channel for each frequency band, the cost and loss are both N times that of a single-frequency receiver, where N is a positive integer greater than or equal to 2.

[0107] As can be seen from FIG1B , receivers 102 and 103 share a broadband ADC module and a peak power detection module. When the signal level in a certain frequency band is too high or there is strong interference, since FIG1B uses FB-AGC gain control, and FB-AGC gain control lags behind the signal level change, the frequency band with a high signal level or interference will affect the reception performance of other frequency bands. As can also be seen from FIG1B , automatic gain control is performed on each frequency band after DDC, and the loop delay of the automatic gain control is relatively long. Taking frequency band 1 as an example, the loop includes: gain control-frequency band 1-broadband gain control-broadband ADC-peak power detection-DDC-AGC. A long loop delay may cause the receiver to respond untimely to large signals or interference, resulting in an increased bit error rate.

[0108] Embodiments of the present application provide a signal gain control method, receiver, and related apparatus. Through these embodiments, a real-time feed-forward automatic gain control (RTFF-AGC) module can be introduced into all or some channels of a receiver. Before combining signals from multiple frequency bands for broadband gain control, broadband ADC, and broadband AGC, the RTFF-AGC module performs gain control on signals with interference, thereby controlling the signal level or interference power to within a reasonable range. This pre-adjustment of the signal level or interference power to a reasonable range ensures that combining signals from multiple frequency bands does not affect the receiver's reception performance for other frequency bands.

[0109] Therefore, the embodiments of the present application can solve the problem of the N-fold increase in cost and power consumption caused by the inability to share an ADC in the receiver shown in Figure 1A. The embodiments of the present application can also solve the problem of the inability of the frequency bands to operate completely independently due to the sub-band AGC lagging behind the wideband AGC after the receiver shown in Figure 1B shares an ADC.

[0110] Please refer to Figure 2, which is a schematic diagram of the architecture of a receiver 200 provided in an embodiment of the present application. As can be seen from Figure 2, receiver 200 includes a wideband LNA 201, a filter 202, an RTFF-AGC module 203, a wideband automatic gain control module 204, a DDC 205, and a LIN 206. The wideband automatic gain control module 204 includes one or more of the following modules: a wideband gain control module 2041, a wideband ADC 2042, and a wideband AGC 2043.

[0111] As can be seen from Figure 2, the broadband LNA 201, broadband gain control module 2041, broadband ADC 2042, and broadband AGC 2043 are shared by signals in all frequency bands. For signals in each frequency band, a filter 202, DDC 205, and LIN 206 are assigned to each signal. It should be noted that the RTFF-AGC module 203 shown in Figure 2 is merely an example, and RTFF-AGC modules can be implemented for certain or all frequency bands. For target frequency bands where demand exists, such as those with a level greater than a preset threshold or significant interference, the RTFF-AGC module 203 can be assigned to those target frequency bands.

[0112] Antenna 1021 refers to a device that can effectively radiate electromagnetic waves in a specific spatial direction or effectively receive electromagnetic waves from a specific spatial direction. During reception, antenna 1021 can effectively convert electromagnetic waves of a specific polarization originating from a specific spatial direction into high-frequency currents in a circuit or guided waves on a transmission line, which are then transmitted to multi-frequency filter 1022. Antenna 1021 can include one or more of the following: array antennas, multi-band antennas, multi-beam antennas, and so on.

[0113] The multi-frequency filter 1022 can receive multi-band signals from the antenna 1021 through a multiplexing interface, and filter the received multi-band signals through a filter to obtain a signal corresponding to each frequency band, and output it to the receiver 200 through the same output interface.

[0114] The broadband LNA 201 is a module shared by signals of each frequency band and is used to amplify the signals of each frequency band. In a possible implementation, independent LNAs can be applied to signals of different frequency bands.

[0115] Filter 202 is configured to filter the amplified signal to obtain a signal corresponding to each frequency band. Furthermore, the filter is configured to determine a signal in a target frequency band from among the received signals in the N frequency bands, where the signal in the target frequency band is a signal with a higher level or interference. In one possible implementation, the embodiments of the present application may also implement filtering by increasing or decreasing the number of filter stages.

[0116] The RTFF-AGC module 203 is used to perform gain control on the signal of the target frequency band according to the control signal to obtain the signal of the target frequency band after gain control, wherein the control signal is a preset external control signal or is determined according to the signal of the target frequency band, and the signal of the target frequency band is amplified or attenuated to an appropriate level after gain control.

[0117] Specifically, the RTFF-AGC module 203 can determine a control signal based on a second signal, where the second signal is a signal obtained by branching the signal of the target frequency band, and the second signal has a second delay. The RTFF-AGC module 203 can then perform gain control on the signal with the first delay based on the control signal to obtain a signal of the target frequency band after gain control, where the second delay is less than the first delay. The signal with the first delay is obtained by delaying the first signal, and the first signal is a signal obtained by branching the signal of the target frequency band.

[0118] In one possible implementation, the RTFF-AGC module 203 may perform branching processing on the signal of the target frequency band to obtain a first signal and a second signal, where the frequency band of the first signal and the second signal is the target frequency band. Further, the RTFF-AGC module 203 may perform delay processing on the first signal to obtain a signal with a first delay.

[0119] It is understood that the filters mentioned in the embodiments of the present application are multi-stage filters. The multi-stage filters are internally composed of multiple cascaded frequency selective filters or multiple mutually coupled resonant units. For example, filter 202 can be a multi-stage filter, and the filter in multi-frequency filter 1022 can also be a multi-stage filter.

[0120] In another possible implementation, the pre-stage of the target frequency band filter in filter 202 can perform branching processing on the signal in the target frequency band to obtain a first signal and a second signal. The first signal enters the RTFF-AGC module 203 after being filtered by the post-stage filter 202, while the second signal can directly enter the RTFF-AGC module 203 for power detection. Furthermore, the first signal after the branching processing by filter 202 and the post-stage filtering by filter 202 has a first time delay. If the first time delay is sufficiently large, the RTFF-AGC module 203 may not delay the first signal.

[0121] In another possible implementation, the front stage of the target frequency band filter in the multi-frequency filter 1022 can perform branching processing on the signal in the target frequency band to obtain a first signal and a second signal. The first signal is filtered by the filter 202 and then enters the RTFF-AGC module 203, while the second signal directly enters the RTFF-AGC module 203 for power detection. Furthermore, the first signal after the branching processing by the multi-frequency filter 1022 is filtered by the rear stage of the multi-frequency filter 1022 and the filter 202, and then has a first delay. If the first delay is sufficiently large, the RTFF-AGC 203 module may not delay the first signal.

[0122] The broadband gain control module 2041 is used to perform common gain control on the signals of all frequency bands after being combined.

[0123] The wideband ADC2042 is used to perform analog-to-digital conversion on the signals of all frequency bands after the combination.

[0124] The broadband AGC2043 is used to perform automatic gain control algorithm processing on the signals of all frequency bands after the combination.

[0125] DDC205 is used to perform digital down-conversion processing on the mixed signal after the combination.

[0126] LIN206 is used to perform AGC linearization processing on the signals of all frequency bands separately and output the baseband data of each frequency band so that the RF channel gain seen by the baseband signal remains unchanged.

[0127] 3 , which is a schematic diagram of the architecture of another receiver 200 provided by an embodiment of the present application, shows that the RTFF-AGC module 203 includes one or more of the following: a radio frequency delay module 2031 , a gain control module 2032 , and a control signal generation module 207 .

[0128] The multi-band signals received by the antenna 1021 are filtered by the multi-band filter 1022 and then combined and output. After passing through the broadband LNA 201, the signals pass through the filter 202 corresponding to each frequency band and then enter the RTFF-AGC module 203 corresponding to each frequency band.

[0129] The radio frequency delay module 2031 is configured to apply a simulated delay of a specific magnitude to the received signal of the current frequency band, thereby obtaining a signal with a first delay.

[0130] The control signal conditioning module 2073 is configured to perform envelope detection on the signal of the current frequency band to obtain a signal indicating the current signal level, compare the signal with a preset reference signal, and output a control signal.

[0131] Gain control module 2032 - frequency bands 1 to n: Each frequency band corresponds to a gain control module, which is used to adjust the signal of the current frequency band according to the gain of the receiver based on the control signal output by the control signal generation module 207.

[0132] As can be seen from Figure 3, an RTFF-AGC module 203 is allocated to the signal of each frequency band in the single-channel multi-frequency receiver 200. The RTFF-AGC module 203 corresponding to frequency band n is taken as an example to illustrate how the embodiment of the present application performs gain control on the signal of frequency band n, such as increasing or decreasing the gain.

[0133] As shown in Figure 3, the signal of frequency band n output at point A is split into a first signal and a second signal. It is understandable that the splitting of the first and second signals does not change the properties of the signal in frequency band n. Therefore, the frequency band of the first and second signals is frequency band n. The first signal enters the main link and passes through the RF delay module 2031 to the gain control module 2032. The second signal enters the control loop and passes through the control signal generation module 207 at point B to generate a control signal that reflects the signal level of frequency band n. Gain control is then performed based on the control signal. The delay of the first signal through the main link is a first delay τ1, and the delay of the second signal through the control loop is a second delay τ2. The first delay τ1 is greater than the second delay τ2. As a result, the control signal reaches the gain control module 2032 before the first signal reaches it. Therefore, the RTFF-AGC module 203 can control the channel gain in real time based on the signal level of the current frequency band, without affecting the normal operation of other frequency bands.

[0134] As shown in Figure 3, the control signal generation module 207 includes one or more of the following modules: an envelope detection circuit 2071, a signal comparison circuit 2072, and a control signal conditioning module 2073. After the second signal passes through the envelope detection circuit 2071, its envelope signal is obtained. The envelope signal of the second signal is compared with a preset reference signal through the signal comparison circuit 2072 to obtain a control signal. The amplitude and type of the control signal are adjusted by the control signal conditioning module 2073. In one possible implementation, the reference value for each frequency band can be different depending on the actual situation. The control signal output by the signal comparison circuit 2072, together with the external control signal, passes through the control signal conditioning module 2073 to adjust the gain of the current receiving channel. The external control signal is optional. If the interference signal pattern of a specific frequency band is known, the user can determine the external control signal for the specific frequency band, thereby controlling the gain of the specific frequency band based on the external control signal. The user can flexibly switch between the internal and external control signals based on the actual situation.

[0135] Therefore, after passing through the RTFF-AGC module 203, the signals of each frequency band are combined and then enter the broadband automatic gain control module 204. In the broadband automatic gain control module 204, automatic gain control is performed by the broadband gain control module 2041, the broadband ADC 2042, and the broadband AGC 2043. The signal output by the broadband automatic gain control module 204 passes through the DDC 205 and is then linearized by combining the control signal output by the RTFF-AGC module 203 for each frequency band and the gain adjustment signal output by the broadband AGC 2043. Baseband data for each frequency band is then obtained.

[0136] For frequency bands with strong interference, the interference level can be reduced by performing gain control on the signal in the frequency band through the RTFF-AGC module 203. For frequency bands with weak interference, the RTFF-AGC module may not be included, and only the second-stage broadband AGC is used to adjust the interference level.

[0137] In a possible implementation, the RTFF-AGC module 203 may be implemented in multiple ways, that is, the control signal generated by the RTFF-AGC module 203 may be an analog signal or a digital signal.

[0138] In another possible implementation, when the RTFF-AGC module 203 generates multiple digital signals, the RTFF-AGC module 203 may determine a target digital signal from the multiple digital signals according to preset requirements, and then perform gain control on the signal in the target frequency band according to the target digital signal to obtain a gained signal, wherein the gained signal meets the preset requirements.

[0139] As shown in Figure 3, the RTFF-AGC module controls interference signals in different frequency bands to appropriate levels in real time before implementing wideband AGC. Interference signals in one frequency band do not affect the normal operation of other frequency bands. Furthermore, multiple frequency bands can maximize the reuse of the wideband gain control module, wideband ADC, and wideband AGC, reducing receiver power consumption and cost.

[0140] Please refer to Figure 4A, which is a schematic diagram of an embodiment of the present application in which a control signal is an analog signal. As can be seen from Figure 4A, the signal S(t) of the target frequency band is divided into two paths. One signal is input into the RF delay module 2031 to obtain a signal S(t-τ1) with a first delay. The other signal passes through the envelope detection circuit 2071 and the signal comparison circuit 2072 to obtain a control signal that can reflect the level of the target frequency band signal. The control signal is input into the control signal conditioning module 2073, and the signal conditioning module and multiplexer in the control signal conditioning module 2073 condition the control signal to generate two analog attenuation control signals. Among them, the analog attenuation control signal has a second delay τ2. One of the analog attenuation control signals is input into the gain control module 2032, and the signal S(t-τ1) with the first delay also enters the gain control module 2032 along the link. Since τ2 is less than τ1, the gain control module 2032 can perform gain control on S(t-τ1) in advance based on the analog attenuation control signal. The analog attenuation control on the other channel undergoes analog-to-digital conversion to obtain analog attenuation value information, which is then input into LIN206 as shown in Figure 2 or Figure 3. Furthermore, the gain control module can be configured using an external control signal through the multiplexer, thereby bypassing the internal control signal conditioning module in special circumstances and improving gain control efficiency.

[0141] Please refer to Figure 4B, which is a schematic diagram of a control signal provided by an embodiment of the present application as a digital signal. As can be seen from Figure 4B, the signal S(t) of the target frequency band is divided into two paths. One signal is input into the RF delay module 2031 to obtain a signal S(t-τ1) with a first delay. The other signal passes through the envelope detection circuit 2071 and the signal comparison circuit 2072 to obtain a control signal that can reflect the level of the target frequency band signal. The control signal is input into the control signal conditioning module 2073, and the signal conditioning module and multiplexer in the control signal conditioning module 2073 condition the control signal to generate two 1-bit attenuation control signals. Among them, the 1-bit attenuation control signal has a second delay τ2. One of the 1-bit attenuation control signals is input into the gain control module 2032, and the signal S(t-τ1) with the first delay also enters the gain control module 2032 along the link. Because τ1 is greater than τ2, gain control module 2032 can pre-control the gain of S(t-τ1) based on the 1-bit attenuation control signal. Another 1-bit attenuation control signal follows the link and is input to LIN 206, as shown in Figures 2 or 3. Furthermore, the gain control module can be configured using an external control signal through a multiplexer, bypassing the internal control signal conditioning module in special circumstances and improving gain control efficiency.

[0142] Please refer to Figure 4C, which is a schematic diagram of another control signal provided by an embodiment of the present application as a digital signal. As can be seen from Figure 4C, the signal S(t) of the target frequency band is divided into two paths. One signal is input into the RF delay module 2031 to obtain a signal S(t-τ1) with a first delay. The other signal passes through the envelope detection circuit 2071 and the signal comparison circuit 2072 to obtain a control signal that can reflect the level of the target frequency band signal. The control signal is input into the control signal conditioning module 2073, and the analog-to-digital conversion module, multiplexer and serial-to-parallel conversion circuit in the control signal conditioning module 2073 condition the control signal to generate two n-bit attenuation control signals. Among them, the n-bit attenuation control signal has a second delay τ2, corresponding to different attenuation values. One of the n-bit attenuation control signals is input into the gain control module 2032, and the signal S(t-τ1) with the first delay also enters the gain control module 2032 along the link. Because τ1 is greater than τ2, gain control module 2032 can pre-control gain of S(t-τ1) based on the n-bit attenuation control signal. Another n-bit attenuation control signal follows the link and is input to LIN 206 shown in Figures 2 or 3. It will be appreciated that each bit in the n-bit channel corresponds to an attenuation control signal, with different bit values ​​corresponding to different attenuations. Therefore, gain control module 2032 can select the control signal with the corresponding bit value for gain control as required. Furthermore, the gain control module can be configured using an external control signal through a multiplexer, bypassing the internal control signal conditioning module in special circumstances to improve gain control efficiency.

[0143] It should be noted that, for the relevant descriptions of the reference signals and external control signals in FIG. 4A , FIG. 4B and FIG. 4C , reference can be made to FIG. 3 , which will not be repeated here.

[0144] Please refer to Figure 5, which is a schematic diagram of the architecture of another single-channel multi-frequency receiver 300 provided in an embodiment of the present application. As can be seen from Figure 5, the single-channel multi-frequency receiver 300 can receive signals in multiple frequency bands through a single channel. The single-channel multi-frequency receiver 300 includes one or more of the following: a broadband LNA 301, a filter 302 and an RTFF-AGC module 303 corresponding to each frequency band, a broadband gain control module 3051, a broadband ADC 3052, a broadband AGC 3053, and a DDC 306 and LIN 307 corresponding to each frequency band. The RTFF-AGC module 303 includes a radio frequency delay module 3031, a gain control module 3032, and a control signal generation module 304. The control signal generation module 304 is used to generate a control signal and includes one or more of the following: an amplifier 3041, an envelope detection circuit 3042, a signal comparison circuit 3043, and a control signal conditioning module 3044.

[0145] After antenna 1021 receives the multi-band signal, it filters the received multi-band signal through the filter in multi-band filter 3022 to obtain a signal corresponding to each frequency band. Two signals corresponding to each frequency band are coupled out from the intermediate stage of the filter corresponding to each frequency band: one is the first signal, and the other is the second signal. The second signal enters control signal generation module 304. Within control signal generation module 304, the second signal passes through amplifier 3041 and then enters envelope detection circuit 3042 and signal comparison circuit 3043, where it is compared with a preset reference signal to obtain a control signal. Control signal conditioning module 3044 can adjust the amplitude of the control signal so that the gain of the current receiving channel can be adjusted using the control signal. A description of the external control signal can be found in Figure 3 and will not be repeated here. After the second signal passes through amplifier 3041, envelope detection circuit 3042, signal comparison circuit 3043, and control signal conditioning module 3044, the control signal output by control signal conditioning module 3044 has a second delay.

[0146] After post-filtering in the multi-band filter 3022, the first signal from each frequency band is combined and fed into the wideband LNA 301. After passing through the filter 302 corresponding to each frequency band, it enters the RF delay module 3031. The first signal output by the RF delay module 3031 has a first delay. Because the first delay is greater than the second delay, the control signal has already reached the gain control module 3032 by the time the first signal reaches the gain control module 3032. Therefore, gain control can be pre-emptively applied to the first signal based on the control signal. After gain control, the signal in the target frequency band is amplified or attenuated to an appropriate level. It can be understood that the first signal is derived from the frequency band signal branching and therefore retains all the characteristics of the original signal. Therefore, "gain control of the first signal based on the control signal" can also be understood as "gain control of the signal in the corresponding frequency band based on the control signal."

[0147] As can be seen from Figure 3 , in the single-channel multi-frequency receiver 200 shown in FIG3 , the first delay is provided by the RF delay module 2031, while the second delay is provided by the envelope detection circuit 2071, the signal comparison circuit 2072, and the control signal conditioning module 2073. As can be seen from Figure 5 , in the single-channel multi-frequency receiver 300 shown in FIG5 , the first delay is provided by the post-stage multi-frequency filter 3022, the wideband LNA 301, the filter 302, and the RF delay module 3031, while the second delay is provided by the amplifier 3041, the envelope detection circuit 3042, the signal comparison circuit 3043, and the control signal conditioning module 3044. Therefore, the single-channel multi-frequency receiver 300 shown in FIG5 further increases the first delay, making it easier to achieve a first delay greater than the second delay.

[0148] As can be seen from Figure 5, by utilizing the characteristics of the multi-stage cascade filter in the multi-frequency receiver, the signal coupling point of the pre-gain module is moved to the middle stage of the first set of filters, and the delay characteristics of the channel filter are used to increase the signal delay.

[0149] Please refer to Figure 6, which is a schematic diagram of the architecture of another single-channel multi-frequency receiver 400 provided in an embodiment of the present application. As can be seen from Figure 6, the single-channel multi-frequency receiver 400 includes one or more of the following: a wideband LNA 401, a filter 402 and an RTFF-AGC module 403 corresponding to each frequency band, a wideband gain control module 4051, a wideband ADC 4052, a wideband AGC 4053, and a DDC 406 and LIN 407 corresponding to each frequency band. The RTFF-AGC module 403 includes one or more of the following: a gain control module 4032 and a control signal conditioning module 404. The control signal generation module 404 includes one or more of the following: an amplifier 4041, an envelope detection circuit 4042, a signal comparison circuit 4043, and a control signal conditioning module 4044.

[0150] The single-channel multi-frequency receiver 400 shown in FIG6 is based on the single-channel multi-frequency receiver 300 shown in FIG5 , but eliminates the RF delay module 3031 on the main link. Instead, the first delay is provided by the subsequent stages of the multi-frequency filter 4022 and the filter 402. It will be appreciated that, given that the subsequent stages of the multi-frequency filter 4022 and the filter 402 can provide the first delay, and that the first delay is greater than the second delay, eliminating the RF delay module 3031 shown in FIG5 can reduce costs and power consumption.

[0151] Please refer to Figure 7, which is a schematic diagram of the architecture of a single-channel dual-frequency receiver 500 provided in an embodiment of the present application. As can be seen from Figure 7, the single-channel dual-frequency receiver 500 can receive signals in two frequency bands through a single channel. The single-channel dual-frequency receiver 500 may include one or more of the following: a wideband LNA 501, filters 502 corresponding to the two frequency bands, an RTFF-AGC module 504 corresponding to one of the two frequency bands, a wideband gain control module 5051, a wideband ADC 5052, a wideband AGC 5053, and a DDC 506 and a LIN 507 corresponding to the two frequency bands. The RTFF-AGC module 503 includes one or more of the following modules: a radio frequency delay module 5031, a gain control module 5032, and a control signal generation module 504. The control signal conditioning module includes one or more of the following: an envelope detection circuit 5041, a signal comparison circuit 5042, and a control signal conditioning module 5043.

[0152] If it's known in advance that the signal level is greater than a preset threshold or that there's interference in the frequency band, the RTFF-AGC module 503 can be assigned to the signal in that frequency band, while not being assigned to other frequency bands. This allows the signal to be amplified or attenuated to an appropriate level after gain control, while reducing costs. As shown in Figure 7, the signal in frequency band 2 is either greater than the preset threshold or is subject to interference.

[0153] After antenna 1021 receives signals from frequency bands 1 and 2, they are filtered by the filters in multi-band filter 5022 to obtain signals corresponding to frequency bands 1 and 2. Next, RTFF-AGC module 503 performs gain control on the frequency band 2 signal to obtain a gained frequency band 2 signal. After gain control, the frequency band 2 signal is amplified or attenuated to an appropriate level. Therefore, the frequency band 1 signal and the gained frequency band 2 signal are combined and sent to broadband gain control module 5051.

[0154] For the description of other modules shown in FIG7 , please refer to the description shown in FIG3 , which will not be repeated here.

[0155] Please refer to Figure 8, which is a schematic diagram of the architecture of another single-channel dual-frequency receiver 600 provided in an embodiment of the present application. As can be seen from Figure 8, the single-channel dual-frequency receiver 600 can receive signals in two frequency bands through a single channel. The single-channel dual-frequency receiver 600 may include one or more of the following: a wideband LNA 601, filters 602 corresponding to the two frequency bands, an RTFF-AGC module 603 corresponding to one of the two frequency bands, a wideband gain control module 6051, a wideband ADC 6052, a wideband AGC 6053, and a DDC 606 and a LIN 607 corresponding to the two frequency bands. The RTFF-AGC module 603 includes one or more of the following modules: a radio frequency delay module 6031, a gain control module 6032, and a control signal generation module 604. The control signal generation module 604 includes one or more of the following modules: an amplifier 6041, an envelope detection circuit 6042, a signal comparison circuit 6043, and a control signal conditioning module 6044.

[0156] If it's known in advance which frequency bands have signal levels greater than a preset threshold or are subject to interference, the RTFF-AGC module 603 can be assigned to those signals, while other frequency bands are not. This allows the signal to be amplified or attenuated to an appropriate level after gain control, eliminating interference while reducing costs. As shown in Figure 8, frequency band 2 is where the signal level is greater than the preset threshold or where interference is present.

[0157] After antenna 1021 receives signals in frequency bands 1 and 2, they are filtered by the filters in multi-band filter 6022 to produce signals corresponding to frequency bands 1 and 2. Next, the intermediate filter stage corresponding to frequency band 2 in multi-band filter 6022 couples two signals: one for the first signal and the other for the second signal. The signal in frequency band 1 and the first signal in frequency band 2 are combined and then enter wideband LNA 601. After passing through the corresponding filter 602, the first signal enters RF delay module 6031. The first signal output by RF delay module 6031 has a first delay.

[0158] The second signal enters the control signal generation module 604. Within the control signal generation module 604, the second signal passes through the amplifier 6041 and then enters the envelope detection circuit 6042 and the signal comparison circuit 6043, where it is compared with a preset reference signal to generate a control signal. The control signal conditioning module 6044 can adjust the amplitude of the control signal, so that the gain of the current receiving channel can be adjusted by the control signal. For a description of the external control signal, please refer to Figure 3 and will not be repeated here. After the second signal passes through the amplifier 6041, the envelope detection circuit 6042, the signal comparison circuit 6043, and the control signal conditioning module 6044, the control signal output by the control signal conditioning module 6044 has a second delay.

[0159] Because the first delay is greater than the second delay, the control signal has already reached gain control module 6032 by the time the first signal reaches gain control module 6032. Therefore, gain control can be pre-applied to the first signal based on the control signal, amplifying or attenuating the first signal to an appropriate level after gain control. It can be understood that the first signal is derived from the branched frequency band 2 signal and therefore retains all the characteristics of the frequency band 2 signal. Therefore, "gain control of the first signal based on the control signal" can also be understood as "gain control of the frequency band 2 signal based on the control signal."

[0160] As can be seen from Figure 7 , in the single-channel dual-frequency receiver 500 shown in FIG7 , the first delay is provided by the RF delay module 5031, and the second delay is provided by the envelope detection circuit 5041, the signal comparison circuit 5042, and the control signal conditioning module 5043. As can be seen from Figure 8 , in the single-channel dual-frequency receiver 600 shown in FIG8 , the first delay is provided by the post-stage multi-frequency filter 6022, the wideband LNA 601, the filter 602, and the RF delay module 6031, while the second delay is provided by the amplifier 6041, the envelope detection circuit 6042, the signal comparison circuit 6043, and the control signal conditioning module 6044. Therefore, the single-channel dual-frequency receiver 600 shown in FIG8 further increases the first delay, making it easier to achieve a first delay greater than the second delay.

[0161] For the description of other modules shown in FIG8 , please refer to the description shown in FIG3 , which will not be repeated here.

[0162] Please refer to Figure 9, which is a schematic diagram of the architecture of another single-channel dual-frequency receiver 700 provided in an embodiment of the present application. As can be seen from Figure 9, the single-channel dual-frequency receiver 700 can receive signals in two frequency bands through a single channel. The single-channel dual-frequency receiver 700 may include one or more of the following: a wideband LNA 701, filters 702 corresponding to the two frequency bands, an RTFF-AGC module 703 corresponding to one of the two frequency bands, a wideband gain control module 7051, a wideband ADC 7052, a wideband AGC 7053, and a DDC 706 and a LIN 707 corresponding to the two frequency bands. The RTFF-AGC module 703 includes one or more of the following modules: a gain control module 7032 and a control signal generation module 704. The control signal generation module 704 includes one or more of the following modules: an amplifier 7041, an envelope detection circuit 7042, a signal comparison circuit 7043, and a control signal conditioning module 7044.

[0163] The single-channel dual-frequency receiver 700 shown in FIG9 is based on the single-channel dual-frequency receiver 600 shown in FIG8 , except that the RF delay module 6031 on the main link shown in FIG8 is eliminated. Instead, the first delay is provided by the subsequent stage of the multi-frequency filter 7022 and the filter 702 shown in FIG9 . It will be appreciated that, given that the subsequent stage of the multi-frequency filter 7022 and the filter 702 can provide a sufficient first delay, eliminating the RF delay module 6031 shown in FIG8 can reduce costs and power consumption.

[0164] Please refer to Figure 10, which is a schematic diagram of the architecture of a multi-channel, multi-frequency receiver 800 provided in an embodiment of the present application. In the multi-channel, multi-frequency receiver 800, there are multiple channels, each of which has its corresponding antenna 1021 and multi-frequency filter 8022, which can receive signals from multiple frequency bands. To prevent the interference of frequency bands affecting the normal operation of other frequency bands, an RTFF-AGC module 803 is assigned to one or more of the channels. After obtaining the control signal corresponding to each frequency band, it is sent to the modules in other channels that process the corresponding frequency band. The allocation of the RTFF-AGC module 803 to channel 1 is used as an example for explanation.

[0165] The multi-channel multi-frequency receiver 800 shown in FIG10 includes one or more of the following modules: a broadband LNA 801 corresponding to each channel, a filter 802 corresponding to each frequency band in each channel, an RTFF-AGC module 803 corresponding to each frequency band in channel 1, a radio frequency delay module 8031 ​​and a gain control module 8032 corresponding to each frequency band of multiple channels other than channel 1, a broadband gain control module 8051, a broadband ADC 8052 and a broadband AGC 8053 corresponding to each channel, and a DDC 806 and a LIN 807 corresponding to each frequency band in each channel.

[0166] The RTFF-AGC module 803 corresponding to each frequency band in channel 1 includes one or more of the following: a radio frequency delay module 8031, a gain control module 8032, and a control signal conditioning module 804. The control signal generation module 804 includes one or more of the following: an envelope detection circuit 8041, a signal comparison circuit 8042, and a control signal conditioning module 8043.

[0167] Therefore, after the RTFF-AGC module 803 corresponding to each frequency band in channel 1 generates a control signal, the control signal for the corresponding frequency band is sent to the gain control modules 8032 and LIN 807 of the corresponding frequency bands in other channels via the control signal distribution module 808. Therefore, the other channels can also perform feedforward gain control and linearization operations on the signals of the corresponding frequency bands based on the control signal, ensuring that frequency bands with large signal levels or interference signals do not affect the normal operation of other frequency bands.

[0168] It can be understood that after the signal passes through the RF delay module 8031, it has a first delay, the control signal generated by the control signal conditioning module 804 in channel 1 has a second delay, and the control signal received by the gain control module 8032 of the corresponding frequency band in the other channel has a third delay. To ensure that the gain control module 8032 of the corresponding frequency band in the other channel receives the received signal of the corresponding frequency band only after the control signal reaches the gain control module 8032 of the corresponding frequency band in the other channel, the sum of the second delay and the third delay is less than the first delay.

[0169] It should be noted that, for the description of how the RTFF-AGC module 803 generates the control signal, please refer to FIG. 3 , which will not be repeated here.

[0170] Please refer to Figure 11, which is a schematic diagram of the architecture of another multi-channel, multi-frequency receiver 900 provided in an embodiment of the present application. The multi-channel, multi-frequency receiver 900 shown in Figure 11 includes one or more of the following modules: a broadband LNA 901 corresponding to each channel, a filter 902 corresponding to each frequency band in each channel, an RTFF-AGC module 903 corresponding to each frequency band in channel 1, a radio frequency delay module 9031 and a gain control module 9032 corresponding to each frequency band of each channel other than channel 1, a broadband gain control module 9051, a broadband ADC 9052, and a broadband AGC 9053 corresponding to each channel, and a DDC 906 and a LIN 907 corresponding to each frequency band in each channel.

[0171] The RTFF-AGC module 903 corresponding to each frequency band in channel 1 includes one or more of the following: a radio frequency delay module 9031, a gain control module 9032, and a control signal conditioning module 904. The control signal generation module 904 includes one or more of the following: an amplifier 9041, an envelope detection circuit 9042, a signal comparison circuit 9043, and a control signal conditioning module 9044.

[0172] Therefore, after the RTFF-AGC module 903 corresponding to each frequency band in channel 1 generates a control signal, the control signal for the corresponding frequency band is sent to the gain control modules 9032 and LIN 907 of the corresponding frequency bands in other channels through the control signal distribution module 908. Therefore, the other channels can also perform gain control on the signals of the corresponding frequency bands according to the control signal, so that the signals of the corresponding frequency bands are amplified or attenuated to an appropriate level after gain control.

[0173] For the description of how the RTFF-AGC module 903 generates the control signal, please refer to FIG. 5 , which will not be repeated here.

[0174] Please refer to Figure 12, which is a schematic diagram of the architecture of another multi-channel, multi-frequency receiver 1000 provided in an embodiment of the present application. The multi-channel, multi-frequency receiver 1000 shown in Figure 12 includes one or more of the following modules: a broadband LNA 1001 corresponding to each channel, a filter 1002 corresponding to each frequency band in each channel, an RTFF-AGC module 1003 corresponding to each frequency band in channel 1, a gain control module 10032 corresponding to each frequency band of each channel other than channel 1, a broadband gain control module 10051, a broadband ADC 10052, and a broadband AGC 10053 corresponding to each channel, and a DDC 1006 and a LIN 1007 corresponding to each frequency band in each channel.

[0175] The RTFF-AGC module 1003 corresponding to each frequency band in channel 1 includes one or more of the following: a gain control module 10032 and a control signal conditioning module 1004. The control signal generation module 1004 includes one or more of the following: an amplifier 10041, an envelope detection circuit 10042, a signal comparison circuit 10043, and a control signal conditioning module 10044.

[0176] The multi-channel, multi-frequency receiver 1000 shown in FIG12 is based on the multi-channel, multi-frequency receiver 900 shown in FIG11 , except that the RF delay module 9031 on the main link shown in FIG11 is eliminated. Instead, the first delay is provided by the subsequent stage of the filter 10022 and the filter 1002 shown in FIG12 . It will be appreciated that, given that the subsequent stage of the filter 10022 and the filter 1002 can provide a sufficient first delay, eliminating the RF delay module 9031 shown in FIG11 can reduce costs and power consumption.

[0177] After the RTFF-AGC module 1003 corresponding to each frequency band in channel 1 generates a control signal, the control signal for the corresponding frequency band is sent to the gain control modules 10032 and LIN 1007 of the corresponding frequency bands in other channels via the control signal distribution module 1008. Therefore, the other channels can also perform gain control on the signals of the corresponding frequency bands based on the control signal, so that the signals of the corresponding frequency bands are amplified or attenuated to an appropriate level through gain control.

[0178] In a multi-channel or array-type multi-frequency receiver, since the interference signal characteristics received by each channel are highly similar, one or several channels can be selected to add an RTFF-AGC module, and the gain of the corresponding frequency band receivers of other channels can be adjusted by controlling the signal distribution module expansion interface.

[0179] Please refer to Figure 13, which is a flow chart of a signal gain control method provided in an embodiment of the present application. The method can be applied to the above-mentioned receivers, specifically the receiver 200 shown in Figures 2 and 3, the single-channel multi-frequency receiver 300 shown in Figure 5, the single-channel multi-frequency receiver 400 shown in Figure 6, the single-channel dual-frequency receiver 500 shown in Figure 7, the single-channel dual-frequency receiver 600 shown in Figure 8, the single-channel dual-frequency receiver 700 shown in Figure 9, the multi-channel multi-frequency receiver 800 shown in Figure 10, the multi-channel multi-frequency receiver 900 shown in Figure 11 and the multi-channel multi-frequency receiver 1000 shown in Figure 12.

[0180] The signal gain control method shown in FIG13 may include one or more steps S1301 to S1303. It should be understood that for ease of description, this application describes the steps S1301 to S1303 in this order and is not intended to limit execution to this order. The embodiments of this application do not limit the order, execution time, or number of executions of the one or more steps described above.

[0181] Step S1301: The receiver determines a signal of a target frequency band from signals of N received frequency bands.

[0182] Wherein, N is a positive integer greater than or equal to 1, and the signal of the target frequency band is a signal whose level is greater than a preset threshold or has interference.

[0183] It can be understood that the preset threshold is a value set according to actual conditions and can reflect a larger level.

[0184] Step S1302 : Before combining the signal of the target frequency band with the signals of other frequency bands, the receiver performs gain control on the signal of the target frequency band according to the control signal to obtain a gained signal.

[0185] The control signal is a preset external control signal, or a control signal determined according to a signal in a target frequency band. The amplified signal is a signal whose signal level is within a reasonable range, for example, a signal less than a preset threshold.

[0186] In a possible implementation, the receiver performs branching processing on a signal in a target frequency band to obtain a first signal and a second signal, wherein the frequency bands of the first signal and the second signal are the target frequency band.

[0187] The receiver performs delay processing on the first signal to obtain a signal with a first time delay.

[0188] The receiver determines a control signal based on the second signal.

[0189] The control signal has a second delay, which is less than the first delay. It is understandable that the first delay may also be equal to the second delay, which is equivalent to the first signal and the control signal arriving at the same time.

[0190] In a possible implementation, the receiver performs envelope detection on the second signal to obtain a signal indicating a power level of the second signal, and compares the signal indicating the power level of the second signal with a preset reference signal to determine the control signal.

[0191] In one implementation, the control signal is an analog signal or a digital signal.

[0192] In one possible implementation, the control signal includes multiple digital signals. The receiver may determine a target digital signal from the multiple candidate digital signals based on a preset level requirement, and perform gain control on the signal having the first delay based on the target digital signal to obtain a gained signal. The gained signal satisfies a preset requirement. For example, if the preset requirement is a 10dB attenuation, the gained signal is attenuated by 10dB.

[0193] In another possible implementation, the receiver may send a control signal to one or more devices processing the target frequency band, and the one or more devices may be configured to perform gain control on signals in the target frequency band received by the one or more devices based on the control signal. The control signal received by the one or more devices has a third delay, and the sum of the second delay and the third delay is less than the first delay. It is understood that the sum of the second delay and the third delay may be equal to the first delay.

[0194] The target frequency band signal is amplified or attenuated to an appropriate level through gain control. Therefore, after the target frequency band signal is combined with the signals of other frequency bands, the normal operation of other frequency bands will not be affected.

[0195] Step S1303: Perform automatic gain control and linearization control on the combined signal.

[0196] The combined signal includes the amplified signal of the target frequency band and the signals of the N frequency bands excluding the target frequency band.

[0197] Specifically, after the combined signal undergoes wideband gain control, wideband ADC, and wideband AGC, DDC is performed on the signals in each frequency band. The received signal in the target frequency band is then linearized using the control signal and wideband AGC gain adjustment signal of the target frequency band, and the baseband data for the target frequency band is output. It will be appreciated that if each frequency band in the received signal has a control signal, the control signal and wideband AGC gain adjustment signal for each frequency band can be used together to linearize the received signal in each frequency band and output the baseband data for each frequency band.

[0198] FIG14 is a schematic diagram of the structure of a communication device 140 provided in an embodiment of the present application. The communication device 140 can be used to implement the functions of the receiver in the above method. The communication device 140 is a device with computing and / or communication capabilities. The communication device here can be a physical device, such as a network device, a terminal device, etc., or a communication module, component, or chip in a network device, or a communication module, component, or chip in a terminal device, or a device used in conjunction with a network device, or a device used in conjunction with a terminal device.

[0199] As shown in Figure 14 , communication device 140 includes a processor 1401. In one possible implementation, it may also include at least one communication interface 1402, or the processor 1401 and communication interface 1402 may be coupled. In another possible implementation, it may also include at least one memory 1403. Memory 1403 may be integrated with processor 1401, provided separately, or external to communication device 140. It should be understood that this application does not limit the number of processors and memories in communication device 140.

[0200] The processor 1401 is a module for performing calculations and may include any one or more of a controller (e.g., a storage controller), a logic circuit, a baseband processor, a central processing unit (CPU), a graphics processing unit (GPU), a microprocessor (MP), a digital signal processor (DSP), a coprocessor (to assist the central processor in completing corresponding processing and applications), a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a microcontroller unit (MCU), and the like.

[0201] The communication interface 1402 is used to provide information input or output for the at least one processor. And / or, the communication interface 1402 can be used to receive data sent externally and / or send data to the outside. The communication interface 1402 can be an input and output interface, a wired link interface including an Ethernet cable, or a wireless link interface (Wi-Fi, Bluetooth, general wireless transmission and other wireless communication technologies, etc.). Optionally, the communication interface 1402 may also include a transmitter (such as a radio frequency transmitter, antenna, etc.) coupled to the interface, or a receiver, etc.

[0202] Memory 1403 is used to provide storage space, which can optionally store application data, user data, operating systems and computer programs, configuration files, etc. Memory 1403 may include volatile memory, such as random access memory (RAM). Memory 1403 may also include non-volatile memory, such as read-only memory (ROM), flash memory, hard disk drive (HDD), or solid state drive (SSD).

[0203] The communication device 140 may further include a bus 1404, which may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus. Buses may be classified as address buses, data buses, control buses, and the like. For ease of illustration, FIG14 illustrates a single bus line, but this does not imply a single bus or type of bus. Bus 1404 may include a pathway for transmitting information between the various components of the communication device 140 (e.g., the memory 1403, the processor 1401, and the communication interface 1402).

[0204] In the embodiment of the present application, the memory 1403 stores executable instructions, and the processor 1401 executes the executable instructions to implement the aforementioned signal gain control method, such as the signal gain control method in the embodiment of FIG. 13 , which will not be described in detail here. In other words, the memory 1403 stores instructions for executing the signal gain control method.

[0205] When the communication device 140 is a chip used in a terminal, the terminal chip implements the functions of the terminal in the above method embodiment. The terminal chip receives information from other modules in the terminal (such as a radio frequency module or antenna), and the information is sent to the terminal by other terminals or network devices; or the terminal chip outputs information to other modules in the terminal (such as a radio frequency module or antenna), and the information is sent to other terminals or network devices by the terminal.

[0206] When the communication device 140 is a chip used in a network device, the network device chip implements the functions of the network device in the above method embodiment. The network device chip receives information from other modules in the network device (such as a radio frequency module or antenna), and the information is sent to the network device by a terminal or other network device; or the network device chip outputs information to other modules in the network device (such as a radio frequency module or antenna), and the information is sent to the terminal or other network device by the network device.

[0207] An embodiment of the present application may also provide a computer program product, which includes computer instructions. When the instructions are executed on at least one processor, the aforementioned signal gain control method is implemented, such as the signal gain control method in the embodiment of FIG13 .

[0208] In a possible implementation, the computer program product may be a software installation package or an image package. When the aforementioned method is required, the computer program product may be downloaded and executed on a computing device.

[0209] An embodiment of the present application may also provide a communication system, which includes a terminal device and a network device. For a specific description, please refer to the signal gain control method shown in Figure 13.

[0210] The embodiment of the present application may further provide a computer program, which is used to implement the aforementioned signal gain control method, such as the signal gain control method in the embodiment of FIG13 .

[0211] The present application also provides a computer-readable storage medium including instructions for implementing the aforementioned signal gain control method, such as the signal gain control method in the embodiment of FIG13 .

[0212] The computer-readable storage medium may be any available medium capable of being stored by a communication device, or a data storage device such as a data center containing one or more available media. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, or a magnetic tape), an optical medium, or a semiconductor medium (e.g., a solid-state drive).

[0213] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "exemplary" or "for example" should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0214] The “at least one” mentioned in the embodiments of this application refers to one or more, and “plurality” refers to two or more. “At least one of the following items” or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, or c can represent: a, b, c, (a and b), (a and c), (b and c), or (a and b and c), where a, b, c can be single or multiple. “And / or” describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character “ / ” generally indicates that the previous and next associated objects are in an “or” relationship.

[0215] Furthermore, unless otherwise indicated, ordinal numbers such as "first" and "second" in the embodiments of this application are used to distinguish multiple objects and are not intended to limit the order, timing, priority, or importance of multiple objects. For example, the references to a first container storage management device and a second container storage management device are merely for ease of description and do not indicate differences in device structure, deployment order, or importance between the first and second container storage management devices.

[0216] Those skilled in the art will understand that all or part of the steps to implement the above embodiments may be accomplished by hardware, or may be accomplished by a program to instruct the relevant hardware, and the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a disk or an optical disk, etc.

[0217] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the protection scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A signal gain control method, It is characterized in that The method comprises: Determine a signal of a target frequency band from the received signals of N frequency bands, wherein N is a positive integer greater than or equal to 1, and the signal of the target frequency band is a signal whose level is greater than a preset threshold; Before combining the signal of the target frequency band with the signals of other frequency bands, performing gain control on the signal of the target frequency band according to a control signal to obtain a signal after gain, wherein the control signal is a preset external control signal or a control signal determined according to the signal of the target frequency band; Automatic gain control and linearization control are performed on the combined signal, wherein the combined signal includes the signal of the target frequency band after gain and signals of the N frequency bands excluding the target frequency band.

2. The method according to claim 1, It is characterized in that The step of performing gain control on the signal of the target frequency band according to the control signal to obtain a signal after gain includes: Performing branching processing on the signal of the target frequency band to obtain a first signal and a second signal, wherein the frequency band of the first signal and the second signal is the target frequency band; Performing delay processing on the first signal to obtain a signal with a first time delay; Determining a control signal according to the second signal, wherein the control signal has a second delay, and the second delay is less than the first delay; The signal with the first time delay is gain-controlled according to the control signal to obtain a signal after gain.

3. The method according to claim 2, It is characterized in that The determining of the control signal according to the second signal comprises: performing envelope detection processing on the second signal to obtain a signal indicating a power level of the second signal; The signal representing the power level of the second signal is compared with a preset reference signal to determine the control signal.

4. The method according to any one of claims 1 to 3, It is characterized in that The control signal is an analog signal or a digital signal.

5. The method according to claim 4, It is characterized in that The control signal includes a plurality of digital signals, and the gain control is performed on the signal with the first delay according to the control signal to obtain a signal after gain, including: Determining a target digital signal from the multiple digital signals according to preset requirements; The signal with the first delay is gain-controlled according to the target digital signal to obtain a gained signal, wherein the gained signal meets the preset requirement.

6. The method according to any one of claims 1 to 5, It is characterized in that After determining the control signal according to the second signal, the method further includes: The control signal is sent to one or more devices processing the target frequency band, and the one or more devices are used to perform gain control on the signal of the target frequency band received by the one or more devices according to the control signal, and the control signal received by the one or more devices has a third delay, and the sum of the second delay and the third delay is less than the first delay.

7. A receiver, It is characterized in that The receiver includes a filter, a real-time feedforward automatic gain control module and a broadband automatic gain control module, wherein: The filter is used to determine a signal of a target frequency band from signals of N received frequency bands, where N is a positive integer greater than or equal to 1, and the signal of the target frequency band is a signal whose level is greater than a preset threshold; The real-time feedforward automatic gain control module is used to perform gain control on the signal of the target frequency band according to a control signal to obtain the signal of the target frequency band after gain, wherein the control signal is a preset external control signal or a control signal determined according to the signal of the target frequency band; The broadband automatic gain control module is used to perform automatic gain control on the combined signal, wherein the combined signal includes the gained signal of the target frequency band and the signals of the N frequency bands excluding the target frequency band.

8. The device according to claim 7, It is characterized in that The real-time feedforward automatic gain control module is further used to perform branching processing on the signal of the target frequency band to obtain a first signal and a second signal, and the frequency band of the first signal and the second signal is the target frequency band.

9. The device according to claim 7, It is characterized in that The filter is further used to perform branching processing on the signal of the target frequency band to obtain a first signal and a second signal, and the frequency band of the first signal and the second signal is the target frequency band.

10. The device according to claim 9, It is characterized in that The first signal obtained after the filter performs branching processing has a first delay.

11. The device according to claim 9 or 10, It is characterized in that The real-time feedforward automatic gain control module is further used to perform delay processing on the first signal to obtain a signal with a first time delay.

12. The device according to claim 10 or 11, It is characterized in that The real-time feedforward automatic gain control module is specifically used for: Determine a control signal according to the second signal, the control signal having a second delay, the second delay being smaller than the first delay; The signal with the first time delay is gain-controlled according to the control signal to obtain a signal of the target frequency band after gain.

13. The device according to any one of claims 7 to 12, It is characterized in that The control signal is an analog signal or a digital signal.

14. The device according to claim 13, It is characterized in that The control signal includes a plurality of digital signals, and the real-time feedforward automatic gain control module is specifically used for: Determining a target digital signal from the multiple digital signals according to preset requirements; The signal with the first delay is gain-controlled according to the target digital signal to obtain a gained signal, wherein the gained signal meets the preset requirement.

15. The device according to any one of claims 12 to 14, It is characterized in that The device also includes a control signal distribution module, which is used to send the control signal to one or more devices that process the target frequency band, and the one or more devices are used to perform gain control on the signal of the target frequency band according to the control signal. The control signal received by the first or more devices has a third delay, and the sum of the second delay and the third delay is less than the first delay.

16. A communication device, It is characterized in that Comprising a receiver as claimed in any one of claims 7 to 15.

17. A chip system, It is characterized in that The chip system includes a processor and a communication interface; The communication interface is used to receive and / or send data, and / or the communication interface is used to provide input and / or output for the processor; The processor is configured to implement the method according to any one of claims 1 to 6.

18. A computer-readable storage medium, It is characterized in that The computer-readable storage medium stores instructions, and when the instructions are executed on at least one processor, the method according to any one of claims 1 to 6 is implemented.

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