Communication device, control method and receiver

Abstract

The present application relates to a communication device, a control method and a receiver; wherein the communication device comprises a first-stage low-noise amplifier with a bypass function, a second-stage low-noise amplifier, an electrically adjustable attenuation circuit and an analog-to-digital converter connected in sequence; the analog-to-digital converter processes the radio frequency input signal processed in sequence by the first-stage low-noise amplifier, the second-stage low-noise amplifier and the electrically adjustable attenuation circuit, and outputs the collected data; the collected data is used to instruct the control module to control the first-stage low-noise amplifier and the electrically adjustable attenuation circuit respectively. The present application can improve the receiving dynamic range while ensuring the receiving sensitivity of the device.

Description

Technical Field

[0001] The present application relates to the field of mobile communication technology, and in particular to a communication device, a control method and a receiver. Background Art

[0002] With the rapid development of mobile communication technology, the requirements for communication equipment receivers are gradually increasing, and dedicated communication networks will also exist for a long time. In communication networks without power control or with slow power control, it is necessary to ensure the normal operation of the equipment, requiring the receiver to have a very large dynamic range. At the same time, in order to ensure the normal operation of terminals in edge coverage areas, while increasing the dynamic range of the receiver, it is also required to try to ensure the noise coefficient of the system when large signals are input.

[0003] During the implementation process, the inventors found that there are at least the following problems in the traditional technology: the current solution to increase the dynamic range has limited increase in the system dynamic range, and also cannot guarantee the noise coefficient under large signal conditions, affecting the communication quality in weak coverage areas. Summary of the invention

[0004] Based on this, it is necessary to provide a communication device, a control method and a receiver that can improve the receiving dynamic range in order to solve the above technical problems.

[0005] In order to achieve the above object, on the one hand, an embodiment of the present invention provides a communication device, including:

[0006] A first-stage low-noise amplifier with a bypass function, wherein an input end of the first-stage low-noise amplifier is used to receive a radio frequency input signal;

[0007] A second-stage low-noise amplifier, wherein an input end of the second-stage low-noise amplifier is connected to an output end of the first-stage low-noise amplifier;

[0008] An electrically adjustable attenuation circuit, wherein an input end of the electrically adjustable attenuation circuit is connected to an output end of the second-stage low noise amplifier;

[0009] An analog-to-digital converter, wherein the input end of the analog-to-digital converter is connected to the output end of the electrically adjustable attenuation circuit, and the output end of the analog-to-digital converter is used to connect to the control module of the receiver;

[0010] Among them, the analog-to-digital converter processes the RF input signal processed in sequence by the first-stage low-noise amplifier, the second-stage low-noise amplifier, and the electrically adjustable attenuation circuit, and outputs the collected data; the collected data is used to instruct the control module to perform corresponding control on the first-stage low-noise amplifier and the electrically adjustable attenuation circuit respectively.

[0011] In one embodiment, the first-stage low noise amplifier includes a bypass switch; the bypass switch is used to connect to the control module;

[0012] The control end of the electric adjustment attenuation circuit is used to connect to the control module;

[0013] The collected data is used to instruct the control module to output a control signal to the control end of the electrically adjustable attenuation circuit and / or to output a control signal to the bypass switch.

[0014] In one of the embodiments, the electrically adjustable attenuation circuit includes an electrically adjustable attenuator;

[0015] The input end of the electrically adjustable attenuator is connected to the output end of the second-stage low noise amplifier, the output end of the electrically adjustable attenuator is connected to the input end of the analog-to-digital converter, and the control end of the electrically adjustable attenuator is used to connect to the control module.

[0016] In one of the embodiments, the electrically adjustable attenuation circuit includes a first electrically adjustable attenuator and a second electrically adjustable attenuator;

[0017] The input end of the first electrically adjustable attenuator is connected to the output end of the second-stage low noise amplifier, the output end of the first electrically adjustable attenuator is connected to the input end of the second electrically adjustable attenuator, and the control end of the first electrically adjustable attenuator is used to connect to the control module;

[0018] The output end of the second electrically adjustable attenuator is connected to the input end of the analog-to-digital converter, and the control end of the second electrically adjustable attenuator is used to connect to the control module.

[0019] In one embodiment, the electrically adjustable attenuator circuit further includes an amplifier connected between the first electrically adjustable attenuator and the second electrically adjustable attenuator.

[0020] A method for controlling a communication device, for controlling the above communication device, the method comprising the following steps:

[0021] Receiving collected data output by the analog-to-digital converter;

[0022] Compare the collected data with the preset threshold, and output a first control signal to the electrically adjustable attenuation circuit and / or output a second control signal to the first-stage low-noise amplifier based on the comparison result; wherein the preset threshold is obtained based on the full-scale data of the analog-to-digital converter.

[0023] In one embodiment, the first control signal is a serial signal or a parallel signal; the second control signal is a high level signal or a low level signal; the preset thresholds include an automatic gain control upper threshold and an automatic gain control lower threshold;

[0024] The step of comparing the collected data with a preset threshold and, based on the comparison result, outputting a first control signal to the electrically adjustable attenuation circuit and / or outputting a second control signal to the first-stage low noise amplifier comprises:

[0025] If the comparison result is that the collected data is greater than the upper threshold of the automatic gain control, a first control signal is output to the electrically adjustable attenuation circuit to increase the attenuation of the electrically adjustable attenuation circuit until the attenuation of the electrically adjustable attenuation circuit reaches a preset value, and a second control signal is output to the bypass switch of the first-stage low-noise amplifier to reduce the attenuation value of the electrically adjustable attenuation circuit by a preset value until the electrically adjustable attenuation circuit is attenuated to the maximum attenuation value;

[0026] If the comparison result is that the collected data is less than the lower threshold of the automatic gain control, the gain is increased until the previous stage gain reaches the maximum value.

[0027] In one of the embodiments, the size of the preset value is the gain value or the maximum attenuation value of the first-stage low-noise amplifier; the size of the preset value is the gain value of the first-stage low-noise amplifier;

[0028] The upper threshold of automatic gain control is half of the full-scale data; the lower threshold of automatic gain control is one-third of the full-scale data.

[0029] A receiver, comprising a control module and the communication device as described above;

[0030] The control module is connected to the output end of the analog-to-digital converter.

[0031] In one embodiment, the control module is a FPGA.

[0032] One of the above technical solutions has the following advantages and beneficial effects:

[0033] The present application includes a first-stage low-noise amplifier, a second-stage low-noise amplifier, an electrically adjustable attenuation circuit and an analog-to-digital converter which are connected in sequence; wherein the first-stage low-noise amplifier, the electrically adjustable attenuation circuit and the analog-to-digital converter are all used to connect to a control module of a receiver; a radio frequency input signal is input from an input end of a first-stage low-noise amplifier with a bypass function, and then the analog-to-digital converter transmits the collected data to the control module to control the bypass function of the low-noise amplifier and the electrically adjustable attenuation circuit; the present application can greatly improve the receiving dynamic range of the receiver, while ensuring the noise coefficient of the receiver, and ensuring the receiving sensitivity of the receiver to the greatest extent; the present application provides a larger dynamic range of the receiver, and ensures the noise coefficient of the receiver under large signal input conditions, and is simple and easy to implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0035] Figure 1 is a schematic structural diagram of a communication device in one embodiment;

[0036] Figure 2 A schematic diagram of the control structure of a first-stage low noise amplifier and an electrically adjustable attenuation circuit in a communication device in one embodiment;

[0037] Figure 3 A schematic diagram of the structure of an electrically adjustable attenuation circuit of a communication device in one embodiment;

[0038] Figure 4 A schematic diagram of the structure of an electrically adjustable attenuation circuit of a communication device in another embodiment;

[0039] Figure 5 is a schematic diagram of a specific structure of a communication device in an embodiment;

[0040] Figure 6 is a flow chart of a control method of a communication device in one embodiment;

[0041] Figure 7 A schematic diagram of a specific flow chart of a control method for a communication device in an embodiment;

[0042] Figure 8 FIG. 4 is a diagram showing the internal structure of a receiver in one embodiment. DETAILED DESCRIPTION

[0043] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0045] It can be understood that the terms "first", "second", etc. used in the present application can be used in this article to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish the first element from another element.

[0046] Spatially relative terms such as "under," "beneath," "below," "under," "above," "above," and the like may be used herein to describe the relationship of an element or feature shown in the figures to other elements or features. It should be understood that, in addition to the orientations shown in the figures, spatially relative terms also include different orientations of the device in use and operation. For example, if the device in the accompanying drawings is flipped, an element or feature described as "under other elements" or "under it" or "under it" will be oriented as being "above" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. In addition, the device may also include additional orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptors used herein are interpreted accordingly.

[0047] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element, or connected to the other element through an intermediate element. In addition, the "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc. if there is transmission of electrical signals or data between the connected objects.

[0048] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the relevant listed items.

[0049] Traditional solutions to increase dynamic range are often achieved by reducing the gain after the receiver's low-noise amplifier. This has limited effect on increasing the system's dynamic range and cannot guarantee the noise coefficient under large signal conditions, affecting communication quality in areas with weak coverage.

[0050] The present application provides a solution for improving the dynamic range of the receiver while ensuring the noise coefficient, which can not only provide a larger dynamic range of the receiver, but also ensure the noise coefficient of the receiver under large signal input conditions. The solution is simple and easy to implement. The present application is applicable to the receiver design of private network communication systems such as P25 (Project 25, digital communication standard) / iDEN (Integrated Digital Enhanced Networks, integrated digital enhanced network).

[0051] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0052] In one embodiment, Figure 1 As shown, a communication device is provided, and the device is applied to a receiver as an example for description, including:

[0053] A first-stage low-noise amplifier 110 with a bypass function, wherein an input end of the first-stage low-noise amplifier 110 is used to receive a radio frequency input signal;

[0054] A second-stage low noise amplifier 120, wherein an input end of the second-stage low noise amplifier 120 is connected to an output end of the first-stage low noise amplifier 110;

[0055] An electrically adjustable attenuation circuit 130, wherein an input end of the electrically adjustable attenuation circuit 130 is connected to an output end of the second-stage low noise amplifier 120;

[0056] An analog-to-digital converter 140, wherein an input end of the analog-to-digital converter 140 is connected to an output end of the electrically adjustable attenuation circuit 130, and an output end of the analog-to-digital converter 140 is used to connect to a control module of a receiver;

[0057] Among them, the analog-to-digital converter processes the RF input signal processed in sequence by the first-stage low-noise amplifier 110, the second-stage low-noise amplifier 120, and the electrically adjustable attenuation circuit 130, and outputs the collected data; the collected data is used to instruct the control module to perform corresponding control on the first-stage low-noise amplifier 110 and the electrically adjustable attenuation circuit 130 respectively.

[0058] Specifically, if Figure 1 As shown, the present application may include a first-stage low noise amplifier 110, a second-stage low noise amplifier 120, an electrically adjustable attenuation circuit 130 and an analog-to-digital converter 140 connected in sequence; wherein the first-stage low noise amplifier 110, the electrically adjustable attenuation circuit 130 and the analog-to-digital converter 140 are all used to connect to a control module of a receiver; an RF input signal is input from an input end of the first-stage low noise amplifier 110 with a bypass function, and then the analog-to-digital converter 140 outputs the collected data to the control module to control the low noise amplifier bypass function and the electrically adjustable attenuation circuit 130.

[0059] Among them, the RF input signal is input from the input end of the low noise amplifier with bypass function (i.e., the first-stage low noise amplifier 110), the output end of the low noise amplifier with bypass function is connected to the input end of the second-stage low noise amplifier (i.e., the second-stage low noise amplifier 120), the output end of the second-stage low noise amplifier is connected to the input end of the electrically adjustable attenuation circuit 130, the output end of the electrically adjustable attenuation circuit 130 is connected to the input end of the A / D converter (i.e., the analog-to-digital converter 140), and the data collected by the A / D converter is sent to the control module to control the low noise amplifier (with bypass function) and the electrically adjustable attenuation circuit.

[0060] In the present application, the control module performs the control of the low noise amplifier bypass function and the electrically adjustable attenuation circuit, which may refer to the control module outputting corresponding control signals for control, for example, overflow protection control, pre-stage gain processing, amplifier gain processing, etc.; in one example, the control module may implement the above-mentioned corresponding control functions in the form of automatic gain control.

[0061] The present application proposes to use a low noise amplifier with a bypass function, that is, a first-stage low noise amplifier 110 with a bypass function, and the use of the first-stage low noise amplifier 110 with a bypass function further improves the dynamic range of the receiver; specifically, when a large signal is input, the present application reduces the gain of the previous stage by bypassing the first-stage low noise amplifier (low noise amplifier with a bypass function, that is, the first-stage low noise amplifier 110), so as to achieve normal operation when a large signal is input and improve the dynamic range of the receiver. At the same time, the use of the second-stage low noise amplifier (that is, the second-stage low noise amplifier 120) ensures that the noise system of the device will not be deteriorated when a large signal is input, thereby ensuring the receiving sensitivity of the receiver. In one example, the first-stage low noise amplifier 110 with a bypass function can be implemented using TQL9042 or a low noise amplifier with similar functions.

[0062] It should be noted that, for the second-stage low noise amplifier, the present application proposes that the second-stage low noise amplifier may not have a bypass function, thereby being able to ensure the receiver noise figure under the minimum gain condition. In an example, the second-stage low noise amplifier 120 may be a common low noise amplifier, for example, a BGU8051 or a low noise amplifier with similar RF indicators may be selected to implement it.

[0063] For an analog-to-digital converter, the analog-to-digital converter can process the RF input signal processed by the first-stage low-noise amplifier, the second-stage low-noise amplifier, and the electrically adjustable attenuation circuit in sequence, and output the collected data. Specifically, the RF input signal processed by the first-stage low-noise amplifier, the second-stage low-noise amplifier, and the electrically adjustable attenuation circuit in sequence enters the analog-to-digital converter (i.e., A / D converter) as an input signal, and then the analog-to-digital converter outputs a digital signal (i.e., collected data). In one example, the input signal is a RF signal entering the analog-to-digital converter, and the RF signal is collected by the analog-to-digital converter to obtain a digital signal.

[0064] In one embodiment, if Figure 2 As shown, the first-stage low noise amplifier 110 may include a bypass switch; the bypass switch is used to connect to the control module;

[0065] The control end of the electrically adjustable attenuation circuit 130 is used to connect to the control module;

[0066] The collected data is used to instruct the control module to output a control signal to the control terminal of the electrically adjustable attenuation circuit 130 and / or to output a control signal to the bypass switch.

[0067] Specifically, the first stage low noise amplifier in the present application can adopt a bypassable low noise amplifier (such as Figure 2 The control module can control the low noise amplifier bypass switch and the electrically adjustable attenuation circuit according to the collected data of the A / D converter (i.e., the analog-to-digital converter), for example, by inputting a corresponding control signal; in one example, the control signal for controlling the low noise amplifier bypass switch can be a high or low level signal; the control signal for controlling the electrically adjustable attenuation circuit can be a serial signal or a parallel signal.

[0068] It should be noted that Figure 2 The ellipsis in the figure indicates the components not shown in this figure, i.e. Figure 2 The structure shown in the figure is only a block diagram of a part of the structure related to this example. The specific communication device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components. Please refer to the contents recorded in each embodiment of this application for clarification.

[0069] In a specific embodiment, Figure 3 As shown, the electrically adjustable attenuation circuit 130 may include an electrically adjustable attenuator;

[0070] The input end of the electrically adjustable attenuator is connected to the output end of the second-stage low noise amplifier 120 , the output end of the electrically adjustable attenuator is connected to the input end of the analog-to-digital converter 140 , and the control end of the electrically adjustable attenuator is used to connect to the control module.

[0071] Specifically, the electrically adjustable attenuator circuit 130 in the present application can be implemented by an electrically adjustable attenuator, that is, the present application includes a first-stage low-noise amplifier 110 with a bypass function, a second-stage low-noise amplifier 120, an electrically adjustable attenuator and an A / D converter. The RF input signal is input from the input end of the first-stage low-noise amplifier 110 with a bypass function, the output end of the first-stage low-noise amplifier 110 with a bypass function is connected to the input end of the second-stage low-noise amplifier 120, the output end of the second-stage low-noise amplifier 120 is connected to the input end of the electrically adjustable attenuator, the output end of the electrically adjustable attenuator is connected to the input end of the A / D converter, and the data collected by the A / D converter is sent to the control module of the receiver to control the first-stage low-noise amplifier with a bypass function and the electrically adjustable attenuator.

[0072] Furthermore, based on the present application, the control module can preferentially set the electrically adjustable attenuator when the collected data exceeds the AGC (Automatic Gain Control) threshold, and after the electrically adjustable attenuator is attenuated to the maximum, control the low noise amplifier with bypass function (i.e., the first-stage low noise amplifier), and at the same time, the attenuation value of the electrically adjustable attenuator can be reduced by a certain value, which can be the gain value of the first-stage low noise amplifier. Furthermore, the present application can greatly improve the receiving dynamic range of the receiver, while ensuring the receiver noise coefficient and maximizing the receiving sensitivity of the receiver; the present application improves the receiving dynamic range of the receiver, while ensuring the receiving sensitivity.

[0073] In the present application, the electrically adjustable attenuator is located after the second-stage low noise amplifier (ie, the second-stage low noise amplifier), which can increase the dynamic range while ensuring the receiving noise coefficient.

[0074] In a specific embodiment, Figure 4 As shown, the electrically adjustable attenuation circuit may include a first electrically adjustable attenuator and a second electrically adjustable attenuator;

[0075] The input end of the first electrically adjustable attenuator is connected to the output end of the second-stage low noise amplifier, the output end of the first electrically adjustable attenuator is connected to the input end of the second electrically adjustable attenuator, and the control end of the first electrically adjustable attenuator is used to connect to the control module;

[0076] The output end of the second electrically adjustable attenuator is connected to the input end of the analog-to-digital converter, and the control end of the second electrically adjustable attenuator is used to connect to the control module.

[0077] Specifically, the present application adopts a two-stage electrically adjustable attenuator; that is, in addition to the electrically adjustable attenuator connected between the second-stage low noise amplifier and the analog-to-digital converter, the present application can also add a first-stage electrically adjustable attenuator after the second-stage low noise amplifier, thereby further improving the dynamic range of the receiver. The electrically adjustable attenuator in the present application is located after the second-stage low noise amplifier, which increases the dynamic range while ensuring the receiving noise coefficient.

[0078] In a specific embodiment, Figure 5 As shown, the electrically adjustable attenuator circuit may further include an amplifier connected between the first electrically adjustable attenuator and the second electrically adjustable attenuator.

[0079] Specifically, if Figure 5 As shown, the first-stage low-noise amplifier is a bypassable low-noise amplifier; the electrically adjustable attenuation circuit may include a first electrically adjustable attenuator, an amplifier, and a second electrically adjustable attenuator connected in sequence. The amplifier may be an ordinary RF amplifier. In one example, it may be implemented by using LXK6101DS, an amplifier tube, etc.; based on the present application, when the collected data exceeds the AGC (automatic gain adjustment) threshold, the electrically adjustable attenuator may be set preferentially, and the maximum attenuation value of the electrically adjustable attenuator may be 32dB; after the electrically adjustable attenuator attenuates to the maximum, the low-noise amplifier with bypass function is controlled, and the attenuation value of the electrically adjustable attenuator is reduced by a certain value, which may be the gain value of the first-stage low-noise amplifier;

[0080] To further improve the dynamic range of the receiver, an electrically adjustable attenuator can be added after the second-stage low noise amplifier, for example, to increase the dynamic range by 32dB (the maximum attenuation value of the general electrically adjustable attenuator is 32dB); based on this application, under the condition of maximum attenuation value, the noise coefficient of the receiver is equivalent to that under the maximum gain of the receiver, which guarantees the demodulation of small signals to a certain extent. Among them, the noise coefficient of the receiver can depend on the noise coefficient of the first-stage low noise amplifier, and then the noise coefficient and gain of the first-stage low noise amplifier of the receiver under the condition of maximum attenuation value and maximum gain are equivalent (which can be obtained by the noise coefficient cascade calculation formula).

[0081] As described above, in the present application, the RF input signal can be input from the input end of the first-stage low-noise amplifier with a bypass function, and then the analog-to-digital converter transmits the collected data to the control module to control the low-noise amplifier bypass function and the electrically adjustable attenuation circuit; the present application can greatly improve the receiving dynamic range of the receiver, while ensuring the receiver noise factor and maximizing the receiver's receiving sensitivity; the present application provides a larger receiver dynamic range, and ensures the receiver noise factor under large signal input conditions, which is simple and easy to implement.

[0082] Those skilled in the art will understand that Figures 1 to 5 The structure shown in the figure is only a block diagram of a part of the structure related to the scheme of the present application, and does not constitute a limitation on the devices and components to which the scheme of the present application is applied. The specific devices and components may include more or fewer parts than shown in the figure, or combine certain parts, or have a different arrangement of parts.

[0083] In one embodiment, Figure 6As shown, a control method for a communication device is provided, and the method is applied to a control module in a receiver as an example for explanation. The control method is used to control the above communication device, and the method includes the following steps:

[0084] Step 602, receiving the collected data output by the analog-to-digital converter;

[0085] Step 604, compare the collected data with the preset threshold, and output a first control signal to the electrically adjustable attenuation circuit and / or output a second control signal to the first-stage low noise amplifier based on the comparison result; wherein the preset threshold is obtained based on the full-scale data of the analog-to-digital converter.

[0086] Specifically, the control module controls the low noise amplifier bypass switch (i.e., the first-stage low noise amplifier) ​​and the electrically adjustable attenuation circuit according to the collected data and preset threshold of the A / D converter, and outputs the corresponding control signal. The preset threshold can be obtained according to the full-scale data of the analog-to-digital converter (i.e., the A / D converter). In one example, the preset threshold can be reduced by 3dB according to the input signal under the full-scale condition of the AD as AD overflow protection. Among them, the input signal can be a radio frequency signal entering the A / D converter, and the radio frequency signal is collected by the A / D converter to obtain a digital signal.

[0087] In a specific embodiment, the first control signal may be a serial signal or a parallel signal; the second control signal may be a high level signal or a low level signal; the preset threshold may include an automatic gain control upper threshold and an automatic gain control lower threshold;

[0088] like Figure 7 As shown, the step of comparing the collected data with the preset threshold and outputting a first control signal to the electrically adjustable attenuation circuit and / or outputting a second control signal to the first-stage low noise amplifier according to the comparison result may include:

[0089] If the comparison result is that the collected data is greater than the upper threshold of the automatic gain control, a first control signal is output to the electrically adjustable attenuation circuit to increase the attenuation of the electrically adjustable attenuation circuit until the attenuation of the electrically adjustable attenuation circuit reaches a preset value, and a second control signal is output to the bypass switch of the first-stage low-noise amplifier to reduce the attenuation value of the electrically adjustable attenuation circuit by a preset value until the electrically adjustable attenuation circuit is attenuated to the maximum attenuation value;

[0090] If the comparison result is that the collected data is less than the lower threshold of the automatic gain control, the gain is increased until the previous stage gain reaches the maximum value.

[0091] Specifically, the A / D converter outputs the collected data, and the preset thresholds may include an overflow protection threshold (also referred to as an automatic gain control AGC upper threshold, i.e., an automatic gain control upper threshold, which can be used to reduce the pre-stage gain processing), and an automatic gain control lower threshold (used for gain processing).

[0092] When the collected data output by the A / D converter is greater than the upper threshold of the automatic gain control, a gain reduction operation is performed, and the implementation method may be: the control module sends a serial or parallel control signal (i.e., a first control signal) to the electrically adjustable attenuator to increase the attenuation of the electrically adjustable attenuator, and when the attenuation of the electrically adjustable attenuator reaches a preset value (maximum attenuation value or first-stage low noise amplifier gain value), a low noise amplifier bypass control is performed;

[0093] The control process of the low noise amplifier bypass control can be that the control module sends high and low level control signals to the low noise amplifier with bypass function, and at the same time reduces the attenuation value of the electrically adjustable attenuator by a certain value (i.e., a preset value), which can be the first-stage low noise amplifier gain value (i.e., the gain value of the first-stage low noise amplifier), until the electrically adjustable attenuator is attenuated to a maximum value (i.e., the maximum attenuation value, generally, the maximum attenuation value of the electrically adjustable attenuator is 32dB). If there is a second-stage electrically adjustable attenuator, the second-stage electrically adjustable attenuator can continue to be attenuated to the maximum value (i.e., the maximum attenuation value); when the data collected by the A / D converter is less than the lower threshold of the automatic gain control, the gain operation can be performed until the gain of the previous stage reaches the maximum value.

[0094] In a specific embodiment, the size of the preset value may be a gain value or a maximum attenuation value of the first-stage low-noise amplifier; the size of the preset value may be a gain value of the first-stage low-noise amplifier;

[0095] The upper threshold of the automatic gain control can be half of the full-scale data; the lower threshold of the automatic gain control can be one-third of the full-scale data.

[0096] Specifically, the collected data of the A / D converter is set to d, and the full-scale data of the A / D converter can be dmax; the present application proposes to use dmax / 2 (i.e., the maximum output signal is reduced by 3dB) as the overflow protection threshold (also called the automatic gain control AGC upper threshold, used to reduce the pre-stage gain processing), and dmax / 3 as the automatic gain control lower threshold (used for gain processing).

[0097] When the collected data of the A / D converter is greater than dmax / 2, a gain reduction operation is performed. The implementation method may include: the control module sends a serial or parallel control signal to the electrically adjustable attenuator to increase the attenuation of the electrically adjustable attenuator. When the attenuation of the electrically adjustable attenuator reaches a maximum value (or the gain value of the first-stage low-noise amplifier), a low-noise amplifier bypass control is performed. The control signal is a high and low level control signal sent by the control module to the low-noise amplifier with a bypass function, and at the same time, the attenuation value of the electrically adjustable attenuator is reduced by a certain value, which can be the gain value of the first-stage low-noise amplifier, until the electrically adjustable attenuator is attenuated to the maximum value. If there is a second-stage electrically adjustable attenuator, the second-stage electrically adjustable attenuator can continue to be attenuated to the maximum value; when the collected data of the A / D converter is less than the lower threshold of the automatic gain control (dmax / 3), a gain increase operation is performed until the gain of the previous stage reaches the maximum value.

[0098] Furthermore, the above example describes a process of reducing gain, while the process of increasing gain performed by the control module in the present application may be an inverse process of the above-mentioned process of reducing gain.

[0099] Specifically, if Figure 7 As shown, if the collected data is less than the lower threshold of the automatic gain control, confirm whether the attenuation value of the current electrically adjustable attenuation circuit is 0. If not, confirm whether the attenuation reduction value is less than the attenuation value; if the attenuation reduction value is less than the attenuation value, set the calculated attenuation value of the electrically adjustable attenuation circuit to complete the gain. If the attenuation reduction value is less than the attenuation value and greater than the attenuation value, then, if it is confirmed that the first-stage low-noise amplifier is turned on, set the attenuation value of the electrically adjustable attenuation circuit to 0 to complete the gain. If the attenuation reduction value is less than the attenuation value and greater than the attenuation value, and it is confirmed that the first-stage low-noise amplifier is turned off, turn on the first-stage low-noise amplifier, and set the calculated attenuation value of the electrically adjustable attenuation circuit to complete the gain.

[0100] In the control method of the above-mentioned communication device, the control module can control the low-noise amplifier bypass switch and the electrically adjustable attenuator according to the collected data of the A / D converter and the preset threshold. The present application can greatly improve the receiving dynamic range of the receiver, while ensuring the noise coefficient of the receiver and maximizing the receiving sensitivity of the receiver; the present application improves the receiving dynamic range of the receiver while ensuring the receiving sensitivity, and is suitable for the receiver design of private network communication systems such as P25 / iDEN.

[0101] It should be understood that although Figure 6 , Figure 7 The steps in the flowchart are shown in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover, Figure 6 , Figure 7At least part of the steps may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least part of the sub-steps or stages of other steps.

[0102] In one example, the present application provides a control device. For the specific definition of the control device, please refer to the definition of the control method of the communication device above, which will not be repeated here. Each module in the above-mentioned control device can be implemented in whole or in part by software, hardware and a combination thereof. The above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory in the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules. It should be noted that the division of modules in the embodiment of the present application is schematic, which is only a logical function division, and there may be other division methods in actual implementation.

[0103] In one embodiment, Figure 8 As shown, a receiver is provided, including a control module and the communication device as described above; wherein the control module is connected to the output end of the analog-to-digital converter.

[0104] In a specific embodiment, the control module may be a FPGA (Field Programmable Gate Array).

[0105] Specifically, the receiver designed by the present application can improve the receiving dynamic range while ensuring the receiving sensitivity of the device. The relevant structure of the communication device can be found in the above text, and the control method of the communication device can also be found in the above text, which will not be repeated here.

[0106] Furthermore, the control module in the present application may be a functional module implemented in an FPGA.

[0107] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the control method of the above-mentioned communication device is implemented.

[0108] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory or optical memory, etc. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM).

[0109] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", "ideal embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.

[0110] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0111] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A communication device, characterized in that: include: A first-stage low-noise amplifier with a bypass function, wherein an input end of the first-stage low-noise amplifier is used to receive a radio frequency input signal; A second-stage low-noise amplifier, wherein an input end of the second-stage low-noise amplifier is connected to an output end of the first-stage low-noise amplifier; An electrically adjustable attenuation circuit, wherein an input end of the electrically adjustable attenuation circuit is connected to an output end of the second-stage low noise amplifier; An analog-to-digital converter, wherein the input end of the analog-to-digital converter is connected to the output end of the electrically adjustable attenuation circuit, and the output end of the analog-to-digital converter is used to connect to a control module of a receiver; The analog-to-digital converter processes the radio frequency input signal processed by the first-stage low noise amplifier, the second-stage low noise amplifier, and the electrically adjustable attenuation circuit in sequence, and outputs acquisition data; the acquisition data is used to instruct the control module to respectively control the first-stage low noise amplifier and the electrically adjustable attenuation circuit; when the acquisition data is greater than the upper threshold of the automatic gain control, the control module sends a first control signal to the electrically adjustable attenuation circuit to increase the attenuation of the electrically adjustable attenuation circuit, and performs bypass control of the first-stage low noise amplifier when the attenuation of the electrically adjustable attenuation circuit reaches a preset value; if the acquisition data is less than the lower threshold of the automatic gain control, it is confirmed whether the attenuation value of the current electrically adjustable attenuation circuit is 0, if not 0, it is confirmed whether the attenuation reduction value is less than the attenuation value of the electrically adjustable attenuation circuit, if the attenuation reduction value is greater than the attenuation value of the electrically adjustable attenuation circuit, and it is confirmed that the first-stage low noise amplifier is turned off, then the first-stage low noise amplifier is turned on, and the calculated attenuation value of the electrically adjustable attenuation circuit is set to complete the gain.

2. The communication device according to claim 1, characterized in that The first-stage low noise amplifier includes a bypass switch; the bypass switch is used to connect to the control module; The control end of the electrically adjustable attenuation circuit is used to connect to the control module; The collected data is used to instruct the control module to output a control signal to the control end of the electrically adjustable attenuation circuit and / or to output a control signal to the bypass switch.

3. The communication device according to claim 1 or 2, characterized in that: The electrically adjustable attenuation circuit comprises an electrically adjustable attenuator; The input end of the electrically adjustable attenuator is connected to the output end of the second-stage low noise amplifier, the output end of the electrically adjustable attenuator is connected to the input end of the analog-to-digital converter, and the control end of the electrically adjustable attenuator is used to connect to the control module.

4. The communication device according to claim 1 or 2, characterized in that: The electrically adjustable attenuation circuit comprises a first electrically adjustable attenuator and a second electrically adjustable attenuator; The input end of the first electrically adjustable attenuator is connected to the output end of the second-stage low noise amplifier, the output end of the first electrically adjustable attenuator is connected to the input end of the second electrically adjustable attenuator, and the control end of the first electrically adjustable attenuator is used to connect to the control module; The output end of the second electrically adjustable attenuator is connected to the input end of the analog-to-digital converter, and the control end of the second electrically adjustable attenuator is used to connect to the control module.

5. The communication device according to claim 4, characterized in that: The electrically adjustable attenuation circuit further includes an amplifier connected between the first electrically adjustable attenuator and the second electrically adjustable attenuator.

6. A method for controlling a communication device, characterized in that: For controlling the communication device according to any one of claims 1 to 5, the method comprises the following steps: Receiving the collected data output by the analog-to-digital converter; Compare the collected data with a preset threshold, and based on the comparison result, output the first control signal to the electrically adjustable attenuation circuit and / or output the second control signal to the first-stage low-noise amplifier; wherein the preset threshold is obtained based on the full-scale data of the analog-to-digital converter.

7. The control method of a communication device according to claim 6, characterized in that: The first control signal is a serial signal or a parallel signal; the second control signal is a high level signal or a low level signal; the preset threshold includes the automatic gain control upper threshold and the automatic gain control lower threshold; The step of comparing the collected data with a preset threshold and, based on the comparison result, outputting the first control signal to the electrically adjustable attenuation circuit and / or outputting the second control signal to the first-stage low noise amplifier comprises: If the result of the comparison is that the collected data is greater than the upper threshold of the automatic gain control, the first control signal is output to the electrically adjustable attenuation circuit to increase the attenuation of the electrically adjustable attenuation circuit until the attenuation of the electrically adjustable attenuation circuit reaches a preset value, and the second control signal is output to the bypass switch of the first-stage low-noise amplifier to reduce the attenuation value of the electrically adjustable attenuation circuit by a preset value until the electrically adjustable attenuation circuit is attenuated to a maximum attenuation value; If the comparison result is that the collected data is less than the automatic gain control lower threshold, the gain is increased until the previous stage gain reaches a maximum value.

8. The control method of the communication device according to claim 7, characterized in that: The size of the preset value is the gain value of the first-stage low-noise amplifier or the maximum attenuation value; the size of the preset value is the gain value of the first-stage low-noise amplifier; The automatic gain control upper threshold is half of the full-scale data; the automatic gain control lower threshold is one-third of the full-scale data.

9. A receiver, characterized in that: comprising a control module, and a communication device as claimed in any one of claims 1 to 5; The control module is connected to the output end of the analog-to-digital converter.

10. The receiver according to claim 9, characterized in that The control module is FPGA.

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