Control method of low noise amplifier circuit, processor, receiver and storage medium

Abstract

The present application discloses a control method of a low-noise amplifier circuit and a processor, a receiver and a storage medium, wherein the control method of the low-noise amplifier circuit includes: determining whether the energy of an interference signal in a radio frequency signal processed by the low-noise amplifier circuit in the current mode meets a first preset condition; if the energy of the interference signal meets the first preset condition, it is determined that there is interference in the radio frequency signal, and when the current mode is the first mode, the second mode is used as the current mode; or, if the energy of the interference signal does not meet the first preset condition, it is determined that there is no interference in the radio frequency signal, and when the current mode is the second mode, the first mode is used as the current mode. The above scheme can improve the sensitivity without affecting the anti-interference performance.

Description

Technical Field

[0001] The present application relates to the field of technical communications, and in particular to a control method for a low-noise amplifier circuit, a processor, a receiver, and a storage medium. Background Art

[0002] Low noise amplifier (LNA) is generally used as a preamplifier for various radio receivers. Its sensitivity often has a great impact on the communication distance. In addition, in wireless communication, anti-interference performance is also one of the important indicators of wireless communication. The better the anti-interference performance, the better the communication quality. In view of this, how to improve the sensitivity without affecting the anti-interference performance has become a topic of great research value. Summary of the invention

[0003] The main technical problem solved by the present application is to provide a control method for a low-noise amplifier circuit and a processor, a receiver and a storage medium, which can improve the sensitivity without affecting the anti-interference performance.

[0004] To solve the above problems, the first aspect of the present application provides a control method for a low-noise amplifier circuit, including: determining whether the energy of an interference signal in a radio frequency signal processed by the low-noise amplifier circuit in a current mode meets a first preset condition; if the energy of the interference signal meets the first preset condition, it is determined that interference exists in the radio frequency signal, and when the current mode is the first mode, the second mode is used as the current mode; or, if the energy of the interference signal does not meet the first preset condition, it is determined that no interference exists in the radio frequency signal, and when the current mode is the second mode, the first mode is used as the current mode; wherein the sensitivity of the low-noise amplifier circuit in the first mode is better than the sensitivity of the low-noise amplifier circuit in the second mode, and the anti-interference performance of the low-noise amplifier circuit in the first mode is worse than the anti-interference performance of the low-noise amplifier circuit in the second mode.

[0005] To solve the above problems, the second aspect of the present application provides a circuit selection device, which includes a memory and a processor coupled to each other, the memory stores program instructions, and the processor is used to execute the program instructions to implement the control method in the above first aspect.

[0006] To solve the above problems, the third aspect of the present application provides a receiver, including a low-noise amplifier circuit and the circuit selection device in the above second aspect, the low-noise amplifier circuit includes at least two LNAs, and the circuit selection device is used to control the conduction of at least two LNAs to select the first mode or the second mode as the current mode of the low-noise amplifier circuit.

[0007] To solve the above problem, the fourth aspect of the present application provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, it can implement the control method in the above first aspect.

[0008] The beneficial effect of the present application is as follows: Different from the prior art, the control method provided by the present application determines whether the energy of the interference signal in the radio frequency signal processed by the low-noise amplifier circuit in the current mode meets the first preset condition. If the energy of the interference signal meets the first preset condition, it is determined that there is interference in the radio frequency signal. Then, when the current mode is the first mode, the second mode is used as the current mode; or if the energy of the interference signal does not meet the first preset condition, it is determined that there is no interference in the radio frequency signal. Then, when the current mode is the second mode, the first mode is used as the current mode. The sensitivity of the low-noise amplifier circuit in the first mode is better than the sensitivity of the low-noise amplifier circuit in the second mode, and the anti-interference performance of the low-noise amplifier circuit in the first mode is worse than the anti-interference performance of the low-noise amplifier circuit in the second mode. Therefore, when there is no interference in the radio frequency signal, the first mode with good sensitivity is selected as the current mode. When there is interference in the radio frequency signal, the second mode with good anti-interference performance is selected as the current mode, thereby improving the sensitivity without affecting the anti-interference performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions in this application, the following briefly introduces the drawings required in the description of the embodiments. Obviously, the drawings described below are only some embodiments of this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0010] Figure 1 It is a flow chart of an embodiment of a control method of a low-noise amplifier circuit of the present application;

[0011] Figure 2 is a schematic diagram of a state of obtaining an interference signal according to an embodiment;

[0012] Figure 3 It is a flow chart of another embodiment of the control method of the low-noise amplifier circuit of the present application;

[0013] Figure 4 It is a schematic diagram of the framework of an embodiment of the circuit selection device of the present application;

[0014] Figure 5 It is a schematic diagram of the framework of an embodiment of a receiver of the present application;

[0015] Figure 6 It is a schematic diagram of the framework of an embodiment of the communication device of the present application;

[0016] Figure 7 It is a schematic diagram of a framework of an embodiment of a computer-readable storage medium of the present application. DETAILED DESCRIPTION

[0017] The following is a clear and complete description of the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0018] See also Figure 1 , Figure 1 This is a flow chart of an embodiment of a control method for a low-noise amplifier circuit of the present application. Specifically, it may include the following steps:

[0019] Step S11: determine whether the energy of the interference signal in the radio frequency signal processed by the low noise amplifier circuit in the current mode meets the first preset condition, if yes, execute step S12, otherwise execute step S13.

[0020] In the disclosed embodiment, the low-noise amplifier circuit can operate in a first mode or a second mode, the sensitivity of the low-noise amplifier circuit in the first mode is better than the sensitivity of the low-noise amplifier circuit in the second mode, and the anti-interference performance of the low-noise amplifier circuit in the first mode is worse than the anti-interference performance of the low-noise amplifier circuit in the second mode.

[0021] In an implementation scenario, the interference described in the embodiments disclosed in this application may include interference of concern in wireless communication, for example, the interference may include but is not limited to: intermodulation interference, blocking interference, etc., which are not limited here. Intermodulation interference and blocking interference are both common interferences in wireless communication, and their specific meanings are not repeated here.

[0022] In one implementation scenario, the low noise amplifier circuit may include at least two LNAs, and the working mode of the low noise amplifier circuit may be controlled by controlling the LNAs included in the low noise amplifier circuit. For example, the low noise amplifier circuit may include a first LNA and a second LNA, and the first mode may be switched to the current mode by turning on the first LNA, and the second mode may be switched to the current mode by turning on the second LNA. The first LNA may include but is not limited to a dual-stage LNA, and the second LNA may include but is not limited to a single-stage LNA. The dual-stage LNA may specifically include an external LNA and an internal LNA, and the single-stage LNA may specifically include an external LNA, or the internal LNA is not limited here.

[0023] In one implementation scenario, during wireless communication, after the antenna receives the wireless signal, the low noise amplifier circuit can process the wireless signal in the current mode to obtain a radio frequency signal, and on this basis, the radio frequency signal can be further energy analyzed. Specifically, the processing process of the low noise amplifier circuit on the wireless signal can refer to the working principle of LNA, which will not be repeated here.

[0024] In a specific implementation scenario, a preset local oscillator signal can be obtained to mix the RF signal processed by the low-noise amplifier circuit in the current mode, and then the mixed signal is demodulated to obtain a demodulated signal, and then the demodulated signal is filtered by a filter to obtain a filtered signal, and on this basis, the energy of the out-of-band signal of the filtered signal is calculated to obtain the energy of the interference signal. Among them, the center frequency of the filter is obtained based on the channel bandwidth and the local oscillator signal frequency offset. The specific calculation method can refer to the technical details of the bandpass filter and other filters, which will not be repeated here.

[0025] Specifically, the local oscillator signal can be a signal generated by a local oscillator in a receiver or communication equipment such as an RRU. Its function is to convert the frequency of the RF signal in combination with a mixer to obtain a mixed signal. For example, after a 900kHz RF signal is converted by a mixer using a 1365kHz local oscillator signal, a 465kHz and 2265kHz mixed signal can be obtained. Other situations can be deduced by analogy and are not listed one by one here.

[0026] In addition, in order to facilitate signal processing, the demodulated signal can be sampled by analog-to-digital sampling to obtain a sampled signal, so that the demodulated signal can be filtered by a filter later. Figure 2 , Figure 2 It is a state diagram of an embodiment of obtaining interference signals. Figure 2 (a) shows the ADC channel filter, so the demodulated signal can be sampled in the range of -f1(kHz) to f1(kHz). Figure 2 (b) to Figure 2 (d), the dotted trapezoid shows a filter, whose center frequency is 4.5kHz, so the sampled signal is filtered by the filter, and the part of the sampled signal that is filtered out by the filter (i.e., the out-of-band signal with a center frequency of -6.5kHz) can be regarded as an interference signal, and the part of the sampled signal that is retained by the filter (i.e., the in-band signal with a center frequency of 4.5kHz) can be regarded as a useful signal. Other situations can be deduced by analogy, and no examples are given here one by one.

[0027] In another specific implementation scenario, the energy of the interference signal may specifically include a power value of the interference signal, which is not limited here.

[0028] In an implementation scenario, the first preset condition may specifically include that the energy of the interference signal is not within the first preset range, that is, after analyzing the energy of the interference signal, it is possible to directly determine whether there is interference in the radio frequency signal by judging whether it is within the first preset range. It should be noted that the first preset range can be specifically set according to actual conditions. For example, a wireless communication test environment can be set up in advance, and the energy of the interference signal under different conditions can be obtained by testing different conditions such as no interference and different types of interference, so that the first preset range can be determined. The specific test process will not be repeated here.

[0029] Step S12: if it is determined that interference exists in the radio frequency signal, when the current mode is the first mode, the second mode is used as the current mode.

[0030] In an implementation scenario, as described above, the first preset condition may specifically include that the energy of the interference signal is not within the first preset range. When the energy of the interference signal satisfies the first preset condition, that is, when the energy of the interference signal is not within the first preset range, it can be determined that there is interference in the RF signal. Therefore, when the current mode is the first mode, it can be switched to the second mode as the current mode, that is, the working mode with better anti-interference performance is switched to the current mode to reduce interference.

[0031] In a specific implementation scenario, the interference signal may specifically include but is not limited to intermodulation interference and blocking interference. When the energy is not within the first preset range, it is possible to further detect whether the energy is greater than the upper limit of the first preset range. If so, it can be determined that there is blocking interference in the wireless communication. Conversely, if the energy is neither within the first preset range nor greater than the upper limit of the first preset range, the energy must be less than the lower limit of the first preset range. In this case, it can be determined that there is intermodulation interference in the wireless communication. Therefore, by detecting whether the energy is greater than the upper limit of the first preset range or less than the lower limit of the first preset range, it can be further determined whether there is intermodulation interference or blocking interference in the wireless communication, which can be helpful in providing richer reference information.

[0032] In one implementation scenario, it can be further determined whether the current service (such as call service, data service, etc.) has ended. If the current service has ended, the first mode can be switched as the current mode, that is, working in a working mode with better sensitivity before the next service starts, so as to improve the sensitivity as much as possible without affecting the service.

[0033] Step S13: if it is determined that there is no interference in the radio frequency signal, then when the current mode is the second mode, the first mode is used as the current mode.

[0034] In one implementation scenario, as described above, the first preset condition may specifically include that the energy of the interference signal is not within the first preset range. When the energy of the interference signal does not meet the first preset condition, that is, when the energy of the interference signal is within the first preset range, it can be determined that there is no interference in the RF signal. Therefore, when the current mode is the second mode, it can be switched to the first mode as the current mode, that is, switching to a working mode with better sensitivity as the current mode to improve signal quality.

[0035] It should be noted that the above steps S12 and S13 can be performed selectively, such as when the energy of the interference signal meets the first preset condition, it can be judged that there is interference in the radio frequency signal, and when the current mode is the first mode, the second mode is used as the current mode, or when the energy of the interference signal does not meet the first preset condition, it can be judged that there is no interference in the radio frequency signal, and when the current mode is the second mode, the first mode is used as the current mode. Of course, different from the above method, when the energy of the interference signal meets the first preset condition, it can be judged that there is interference in the radio frequency signal, and when the current mode is the second mode, the second mode continues to be used as the current mode, and when the energy of the interference signal does not meet the first preset condition, it can be judged that there is interference in the radio frequency signal, and when the current mode is the second mode, the first mode continues to be used as the current mode.

[0036] In one implementation scenario, when the energy of the interference signal meets the first preset condition, it is determined that there is interference in the RF signal, and when the current mode is the first mode, after taking the second mode as the current mode, it can be further determined whether the energy of the interference signal meets the second preset condition, and when the energy of the interference signal meets the second preset condition, it can be determined that the interference signal disappears, and the first mode is taken as the current mode. That is to say, when it is determined that the interference signal disappears, the low-noise amplifier circuit can operate in a high-sensitivity working mode, thereby improving the sensitivity without affecting the anti-interference performance.

[0037] In a specific implementation scenario, the second preset condition can be set to include the energy of the interference signal within the second preset range. It should be noted that the second preset range can also be set in a similar manner to the first preset range, which will not be repeated here. In addition, the upper limit value of the second preset range can be the same as or different from the upper limit value of the first preset range; the lower limit value of the second preset range can be the same as or different from the lower limit value of the first preset range, which is not limited here.

[0038] In a specific implementation scenario, when the energy of the interference signal does not meet the second preset condition, it can be determined that the interference signal still exists, and the first mode can be temporarily switched to the first mode, and the energy of the interference signal can be obtained in the first mode, and whether the interference signal disappears can be determined again based on the energy of the interference signal to determine whether to remain in the second mode or switch back to the first mode. For details, please refer to the relevant description in the following embodiments, which will not be repeated here.

[0039] In one implementation scenario, in order to further improve the sensitivity without affecting the anti-interference performance, when the current mode is the second mode, the first mode can be periodically selected as the temporary mode of the low-noise amplifier circuit at a preset time interval and the temporary mode can be maintained for a preset duration, and the energy of the interference signal in the signal processed by the low-noise amplifier circuit in the temporary mode can be obtained to determine whether there is interference in the wireless communication based on the energy, and switch to the first mode or the second mode based on the judgment result and the current mode. That is, when the current mode is the second mode, the energy of the interference signal can be evaluated by temporarily working in the first mode to determine whether there is interference, so that during the wireless communication, the state of not affecting the anti-interference performance and improving the sensitivity can be continuously maintained.

[0040] In a specific implementation scenario, the preset time interval can be set according to the shortest time required to analyze whether there is interference, and can be specifically set to 3s, 5s, 10s, etc., which is not limited here.

[0041] In a specific implementation scenario, the preset duration can be set according to the shortest duration required to obtain the energy of the interference signal, and can be specifically set to 20ms, 30ms, 40ms, etc., which is not limited here.

[0042] In a specific implementation scenario, the specific process of obtaining the energy of the interference signal can refer to the above-mentioned related description, which will not be repeated here.

[0043] In another implementation scenario, after testing, the receiving sensitivity was significantly improved, while the anti-interference performance did not change significantly when compared with the embodiment of the present disclosure. For details, please refer to Table 1, which is a table of sensitivity and anti-interference performance test results:

[0044] Table 1 Sensitivity and anti-interference performance test results

[0045] Test Project After using the embodiment of the present disclosure Before using the embodiment of the present disclosure Maximum available sensitivity (1%) -122.5 -119.1 Maximum available sensitivity (5%) -124.5 -122.1 Adjacent channel selectivity (high) 65 65 Adjacent channel selectivity (high) 65 65 Off channel -8.8 -8.9 Co-channel suppression (+12% CS) -8.8 -8.9 Co-channel suppression (-12% CS) -8.8 -8.9 Blocking (+1MHz) 92 93 Blocking (+2MHz) 92 93 Blocking (+5MHz) 92 93 Blocking (+10MHz) 92 93 Blocking (-1MHz) 92 93 Blocking (-2MHz) 92 93 Blocking (-5MHz) 92 93 Blocking (-10MHz) 92 93 Intermodulation interference (high side) 67 67.6 Intermodulation interference (low side) 67.2 67.8

[0046] It should be noted that the adjacent channel selectivity, co-channel suppression, blocking, and intermodulation interference in Table 1 are all evaluation indicators of anti-interference performance. By comparison, it can be found that the above evaluation indicators have not changed significantly before and after the use of the embodiments of the present disclosure, and some evaluation indicators have not even changed. However, the sensitivity has changed significantly before and after the use of the embodiments of the present disclosure. At 5% of the maximum available sensitivity, it has increased by 2.4dB, and at 1% of the maximum available sensitivity, it has even increased by 3.4dB. The sensitivity improvement effect is significant.

[0047] In addition, the embodiments disclosed herein and the following disclosed embodiments may be specifically applied to wireless communication modes such as PDT (Police Digital Trunking) and DMR (Digital Mobile Radio), and are not limited here.

[0048] The above scheme determines whether the energy of the interference signal in the radio frequency signal processed by the low noise amplifier circuit in the current mode meets the first preset condition. If the energy of the interference signal meets the first preset condition, it is determined that there is interference in the radio frequency signal. Then, when the current mode is the first mode, the second mode is used as the current mode. If the energy of the interference signal does not meet the first preset condition, it is determined that there is no interference in the radio frequency signal. Then, when the current mode is the second mode, the first mode is used as the current mode. The sensitivity of the low noise amplifier circuit in the first mode is better than the sensitivity of the low noise amplifier circuit in the second mode. The anti-interference performance of the low noise amplifier circuit in the first mode is inferior to the anti-interference performance of the low noise amplifier circuit in the second mode. Therefore, when there is no interference in the radio frequency signal, the first mode with good sensitivity is selected as the current mode. When there is interference in the radio frequency signal, the second mode with good anti-interference performance is selected as the current mode, so that the sensitivity can be improved without affecting the anti-interference performance. In addition, since only the working mode of the low noise amplifier circuit needs to be switched during the wireless communication process, the sensitivity can be improved without affecting the anti-interference performance without adding additional electronic circuits, so it can also help reduce costs.

[0049] See also Figure 3 , Figure 3 This is a flow chart of another embodiment of the control method of the low-noise amplifier circuit of the present application. Specifically, it may include the following steps:

[0050] Step S301: power on and initialize.

[0051] It should be noted that the embodiments of the present disclosure are executed by a processor (the processor may be specifically included in a receiver, or a communication device such as an RRU). The specific structure may be referred to the following disclosed embodiments, which will not be described in detail here.

[0052] Step S302: Using the first mode as the current mode of the low noise amplifier circuit.

[0053] Specifically, when the power is turned on, the first mode can be used as the current mode of the low-noise amplifier circuit by default, or, at the beginning of communication, the first mode can be used as the current mode of the low-noise amplifier circuit by default. As described in the aforementioned disclosed embodiment, the sensitivity of the low-noise amplifier circuit in the first mode is better than the sensitivity of the low-noise amplifier circuit in the second mode, and the anti-interference performance of the low-noise amplifier circuit in the first mode is worse than the anti-interference performance of the low-noise amplifier circuit in the second mode. Therefore, obtaining the energy of the interference signal in the processed RF signal in the first mode has a better reference value for determining whether there is interference in wireless communication, thereby helping to improve the accuracy of circuit control.

[0054] In addition, regarding the specific relationship between the first mode, the second mode and the low-noise circuit, reference may be made to the relevant description in the aforementioned disclosed embodiment, which will not be repeated here.

[0055] Step S303: obtaining an analysis result on whether there is interference in the radio frequency signal based on whether the energy of the interference signal in the radio frequency signal processed by the low noise amplifier circuit in the first mode meets a first preset condition.

[0056] Specifically, the first preset condition can be set to that the energy of the interference signal is not within the first preset range. In the case where the energy of the interference signal meets the first preset condition, that is, when the energy of the interference signal is not within the first preset range, the analysis result may include that there is interference in the radio frequency signal. Conversely, when the energy of the interference signal does not meet the preset condition, that is, when the energy of the interference signal is within the first preset range, the analysis result may include that there is no interference in the radio frequency signal. For the setting method of the first preset range and the process of obtaining the energy of the interference signal, please refer to the relevant description in the aforementioned disclosed embodiment, which will not be repeated here.

[0057] Step S304: determine whether the analysis result includes interference, if not, execute step S305, otherwise, execute step S306.

[0058] Step S305: when the current mode is the second mode, the first mode is used as the current mode; when the current mode is the first mode, the first mode is continued to be used as the current mode.

[0059] Specifically, since the analysis results include the absence of interference, when the current mode is the second mode with better anti-interference performance and worse sensitivity, the first LAN can be turned on and the first mode with better sensitivity can be used as the current mode. Accordingly, when the current mode is the first mode with better sensitivity, the first mode with better sensitivity can continue to be used as the current mode, thereby improving the sensitivity without affecting the anti-interference performance.

[0060] Step S306: when the current mode is the first mode, the second mode is used as the current mode; when the current mode is the second mode, the second mode continues to be used as the current mode.

[0061] Specifically, since the analysis results include the existence of interference, when the current mode is the first mode with better sensitivity but worse anti-interference performance, you can choose to turn on the second LAN and use the second mode with better anti-interference performance as the current mode. Accordingly, when the current mode is the second mode with better anti-interference performance, you can continue to use the second mode as the current mode, thereby benefiting from the second mode with better anti-interference performance to effectively suppress interference, which is beneficial to improving communication quality.

[0062] In addition, it is also possible to determine whether the current service is terminated. If the current service is terminated, the first mode with better sensitivity can be used as the current mode, thereby improving the sensitivity without affecting the service. For details, please refer to the relevant description in the aforementioned public embodiment, which will not be repeated here.

[0063] Step S307: periodically selecting the first mode as the temporary mode of the low noise amplifier circuit at a preset time interval.

[0064] Specifically, when the current mode is the second mode, the first mode can be periodically selected as the temporary mode of the low-noise amplifier circuit according to a preset time interval. The specific setting method of the time interval can refer to the relevant description in the aforementioned disclosed embodiment and will not be repeated here.

[0065] During the execution of step S307, it can be further determined whether the current business has ended. If the current business has ended, the first mode can be switched as the current mode, that is, working in a working mode with better sensitivity before the next business starts, so as to improve the sensitivity as much as possible without affecting the business.

[0066] Step S308: Obtaining the energy of the interference signal in the signal processed by the low noise amplifier circuit in the temporary mode.

[0067] The specific analysis process can refer to the relevant description in the aforementioned public embodiment, which will not be repeated here. It should be noted that, as described in the aforementioned public embodiment, the analysis result can be determined by obtaining whether the energy of the interference signal in the RF signal is within the second preset range. In actual application, when the current mode is the first mode, the first preset range used to analyze whether there is interference, and when the current mode is the second mode, the second preset range used to analyze whether the interference signal is eliminated, the two can be the same or different, and are not limited here.

[0068] It should be noted that after temporarily working in the first mode for a preset period of time and before analyzing the energy of the interference signal, since it is not yet certain whether interference still exists in the wireless communication, in order to avoid the degradation of anti-interference performance caused by still working in the first mode due to the actual existence of interference in the wireless communication, it is possible to switch back to the second mode after maintaining the temporary mode for a preset period of time.

[0069] Step S309: Determine whether the energy of the interference signal meets the second preset condition, if so, execute step S310, otherwise execute step S311.

[0070] Specifically, the second preset condition can be set to include that the energy of the interference signal is within a second preset range. If the energy of the interference signal satisfies the second preset condition, that is, if the energy of the interference signal is within the second preset range, it can be considered that the interference signal disappears, otherwise it can be considered that the interference signal has not disappeared. In addition, for the setting method of the second preset range, please refer to the relevant description in the aforementioned disclosed embodiment, which will not be repeated here.

[0071] Step S310: if it is determined that the interference signal disappears, the first mode is used as the current mode.

[0072] Specifically, since it is determined that the interference disappears, the first mode with better sensitivity can be switched as the current mode, thereby improving the sensitivity without affecting the anti-interference performance.

[0073] Step S311: Re-execute step S303 and subsequent steps.

[0074] Specifically, since when the interference disappears, the mode is switched back to the first mode as the current mode. In this case, the energy of the current interference signal can be obtained in the first mode, and based on this, it can be determined whether there is interference to decide whether to switch the working mode. For details, please refer to the above-mentioned related description, which will not be repeated here.

[0075] Step S312: It is determined that the interference signal has not disappeared, and the second mode is maintained as the current mode.

[0076] Specifically, since it is determined that the interference has not disappeared, the second mode can be maintained as the current mode. For details, please refer to the relevant description in the above disclosed embodiment, which will not be repeated here.

[0077] Step S313: Re-execute step S307 and subsequent steps.

[0078] Specifically, when the interference has not disappeared, the first mode may be temporarily switched again to continuously detect whether the interference has disappeared.

[0079] Different from the above-mentioned embodiment, when the power is turned on and initialized, the first mode is selected as the current mode, and the analysis result is obtained based on whether the energy of the interference signal in the radio frequency signal processed by the low-noise amplifier circuit in the current mode meets the first preset condition. If the analysis result includes the presence of the interference, when the current mode is the second mode, the first mode is used as the current mode. If the analysis result includes the presence of the interference, when the current mode is the first mode, the second mode is used as the current mode, and the first mode is periodically selected as the temporary mode of the low-noise amplifier circuit according to a preset time interval, and the energy of the interference signal in the signal processed by the low-noise amplifier circuit in the temporary mode is obtained, and it is determined whether the energy of the interference signal meets the second preset condition. If the second preset condition is met, it is determined that the interference signal disappears and the first mode is used as the current mode. If the second preset condition is not met, it is determined that the interference signal has not disappeared, and the second mode is maintained as the current mode, and it is temporarily switched back to the first mode to continuously determine whether the interference exists. Therefore, in the whole process of wireless communication, the sensitivity can always be improved without affecting the anti-interference performance.

[0080] See also Figure 4 , Figure 4 1 is a schematic diagram of a circuit selection device 40 of the present application. The circuit selection device 40 includes a memory 41 and a processor 42 coupled to each other. The memory 41 stores program instructions. The processor 42 can implement the steps in any of the above control method embodiments when executing the computer program.

[0081] Specifically, the processor 42 may also be referred to as a CPU (Central Processing Unit). The processor 42 may be an integrated circuit chip having the ability to process signals. The processor 42 may also be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. A general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc. In addition, the processor 42 may be implemented by a plurality of integrated circuit chips.

[0082] In the embodiment of the present disclosure, the processor 42 is used to determine whether the energy of the interference signal in the radio frequency signal processed by the low-noise amplifier circuit in the current mode meets the first preset condition; the processor 42 is used to determine that there is interference in the radio frequency signal when the energy of the interference signal meets the first preset condition, and when the current mode is the first mode, the second mode is used as the current mode; or, the processor 42 is used to determine that there is no interference in the radio frequency signal when the energy of the interference signal does not meet the first preset condition, and when the current mode is the second mode, the first mode is used as the current mode; wherein the sensitivity of the low-noise amplifier circuit in the first mode is better than the sensitivity of the low-noise amplifier circuit in the second mode, and the anti-interference performance of the low-noise amplifier circuit in the first mode is inferior to the anti-interference performance of the low-noise amplifier circuit in the second mode.

[0083] In the above scheme, when there is no interference in the radio frequency signal, the first mode with good sensitivity is selected as the current mode, and when there is interference in the radio frequency signal, the second mode with good anti-interference performance is selected as the current mode, so that the sensitivity can be improved without affecting the anti-interference performance. In addition, since only the working mode of the low-noise amplifier circuit needs to be switched during the wireless communication process, the sensitivity can be improved without affecting the anti-interference performance, without adding additional electronic circuits, which can also help reduce costs.

[0084] In some disclosed embodiments, the processor 42 is used to determine whether the energy of the interference signal satisfies a second preset condition; the processor 42 is used to determine that the interference signal disappears when the energy of the interference signal satisfies the second preset condition, and use the first mode as the current mode.

[0085] Therefore, by judging whether the energy of the interference signal satisfies the second preset condition, and when the second preset condition is met, judging that the interference signal disappears, and taking the first mode as the current mode, when the interference disappears, the low-noise amplifier circuit can operate in the first mode with better sensitivity, thereby improving the sensitivity without affecting the anti-interference performance.

[0086] In some disclosed embodiments, the processor 42 is used to periodically select the first mode as a temporary mode of the low noise amplifier circuit at a preset time interval; the processor 42 is used to obtain the energy of the interference signal in the signal processed by the low noise amplifier circuit in the temporary mode.

[0087] Therefore, when the low-noise amplifier circuit operates in the second mode with better anti-interference performance, by periodically selecting the first mode as the temporary mode of the low-noise amplifier circuit at a preset time interval, and obtaining the energy of the interference signal in the signal processed by the low-noise amplifier circuit in the temporary mode, it can temporarily switch to the first mode with better sensitivity, which is beneficial to improving the accuracy of the energy of the interference signal, and thus can help improve the accuracy of circuit control.

[0088] In some disclosed embodiments, the processor 42 is used to determine whether the current service is terminated; the processor 42 is used to use the first mode as the current mode when the current service is terminated.

[0089] Therefore, when the current business is terminated, working in the first mode with better sensitivity can improve the sensitivity without affecting the normal business.

[0090] In some disclosed embodiments, the processor 42 is configured to determine that interference exists in the RF signal when the energy of the interference signal satisfies a first preset condition, and then, when the current mode is the second mode, continue to use the second mode as the current mode.

[0091] Therefore, when the energy of the interference signal meets the first preset condition, it is determined that there is interference in the RF signal, and when the current mode is the second mode, the second mode continues to be used as the current mode. That is, when there is interference and the device itself is working in the second mode with better anti-interference performance, the second mode continues to be used as the current mode, which will not affect the anti-interference performance.

[0092] In some disclosed embodiments, the processor 42 is configured to determine that there is no interference in the RF signal when the energy of the interference signal does not satisfy a first preset condition, and then, when the current mode is the first mode, continue to use the first mode as the current mode.

[0093] Therefore, when the energy of the interference signal does not meet the first preset condition, it is determined that there is no interference in the RF signal, and when the current mode is the first mode, the first mode continues to be used as the current mode, that is, when there is no interference and the device itself works in the first mode with better sensitivity, the first mode continues to be used as the current mode, which can improve the sensitivity without affecting the anti-interference performance.

[0094] In some disclosed embodiments, the processor 42 is used to obtain a signal after mixing a preset local oscillator signal with a radio frequency signal processed by a low-noise amplifier circuit in a current mode; the processor 42 is used to demodulate the mixed signal to obtain a demodulated signal; the processor 42 is used to filter the demodulated signal using a filter to obtain a filtered signal; the processor 42 is used to calculate the energy of the out-of-band signal of the filtered signal to obtain the energy of the interference signal; wherein the center frequency of the filter is obtained based on the channel bandwidth and the local oscillator signal frequency offset.

[0095] Therefore, a signal is obtained by mixing a preset local oscillator signal with a radio frequency signal processed by a low-noise amplifier circuit in the current mode, and the mixed signal is demodulated to obtain a demodulated signal, and the demodulated signal is filtered by a filter to obtain a filtered signal, and the energy of the out-of-band signal of the filtered signal is calculated to obtain the energy of the interference signal. The center frequency of the filter is obtained based on the channel bandwidth and the local oscillator signal frequency offset, so only mixing, filtering and other processing are required to obtain the energy of the interference signal, which can help reduce the complexity of obtaining the signal energy of the interference signal.

[0096] See also Figure 5 , Figure 5 Schematic diagram of the framework of an embodiment of a receiver 50 of the present application. Figure 5 As shown, the receiver 50 includes a low noise amplifier circuit 51 and a circuit selection device 52, the low noise amplifier circuit 51 includes at least two LNAs 511, and the circuit selection device 52 is a circuit selection device in any of the above-mentioned circuit selection device disclosed embodiments, and the circuit selection device 52 is used to control the conduction of the above-mentioned at least two LNAs 511 to select the first mode or the second mode as the current mode of the low noise amplifier circuit 51.

[0097] In one implementation scenario, as described in the aforementioned disclosed embodiment, the at least two LNAs 511 included in the low-noise amplifier circuit 51 may include a first LNA (not shown) and a second LNA (not shown), wherein the first LNA may include but is not limited to a dual-stage LNA, and the second LNA may include but is not limited to a single-stage LNA, the dual-stage LNA may specifically include an external LNA and an internal LNA, and the single-stage LNA may specifically include an external LNA, wherein the internal LNA may be a low-noise amplifier circuit integrated inside a chip such as an ADC, and the external LNA may be a low-noise amplifier circuit arranged outside a chip such as an ADC, which is not limited herein.

[0098] The above solution can improve the sensitivity of the receiver 50 without affecting the anti-interference performance of the receiver 50.

[0099] See also Figure 6 , Figure 6 6 is a schematic diagram of a framework of an embodiment of a communication device 60 of the present application. The communication device 60 includes an antenna 61, a transmitter 62, a receiver 63 such as in any of the above receiver embodiments, and a duplexer 64, wherein the antenna 61 is connected to an antenna connection terminal 641 of the duplexer 64, the receiver 63 is connected to a signal output terminal 642 of the duplexer 64, and the transmitter 62 is connected to a signal input terminal 643 of the duplexer 64. Specifically, the communication device 60 may include but is not limited to an RRU, etc., which is not limited here.

[0100] In the above solution, the communication device 60 adopts the receiver 63 in any of the above receiver embodiments, so as to improve the sensitivity of the communication device 60 without affecting the anti-interference performance of the communication device 60.

[0101] See also Figure 7 , Figure 7 The schematic diagram of the framework of an embodiment of a computer-readable storage medium 70 of the present application. The storage device 70 stores program instructions 71 that can be executed by a processor, and the program instructions 71 are used to implement the steps in any of the above control method embodiments.

[0102] In the above scheme, when there is no interference in the radio frequency signal, the first mode with good sensitivity is selected as the current mode, and when there is interference in the radio frequency signal, the second mode with good anti-interference performance is selected as the current mode, so that the sensitivity can be improved without affecting the anti-interference performance. In addition, since only the working mode of the low-noise amplifier circuit needs to be switched during the wireless communication process, the sensitivity can be improved without affecting the anti-interference performance, without adding additional electronic circuits, which can also help reduce costs.

[0103] In the several embodiments provided in the present application, it should be understood that the disclosed methods and devices can be implemented in other ways. For example, the device implementation described above is only schematic. For example, the division of modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

[0104] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0105] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0106] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) or a processor (processor) to perform all or part of the steps of each implementation method of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program code.

Claims

1. A control method for a low noise amplifier circuit, characterized in that: The control method comprises: Determining whether the energy of the interference signal in the radio frequency signal processed by the low noise amplifier circuit in the current mode meets the first preset condition; If the energy of the interference signal meets the first preset condition and it is determined that interference exists in the radio frequency signal, then when the current mode is the first mode, the second mode is used as the current mode; Alternatively, if the energy of the interference signal does not meet the first preset condition, it is determined that there is no interference in the radio frequency signal, and when the current mode is the second mode, the first mode is used as the current mode; The sensitivity of the low-noise amplifier circuit in the first mode is better than the sensitivity of the low-noise amplifier circuit in the second mode, and the anti-interference performance of the low-noise amplifier circuit in the first mode is worse than the anti-interference performance of the low-noise amplifier circuit in the second mode. When the current mode is the first mode, after the second mode is used as the current mode, the control method further includes: periodically selecting the first mode as a temporary mode of the low noise amplifier circuit according to a preset time interval; Acquire the energy of the interference signal in the signal processed by the low noise amplifier circuit in the temporary mode; Determine whether the energy of the interference signal in the temporary mode meets a second preset condition; If the energy of the interference signal in the temporary mode meets the second preset condition and it is determined that the interference signal disappears, the first mode is used as the current mode.

2. The control method according to claim 1, characterized in that: If the energy of the interference signal satisfies the first preset condition and it is determined that interference exists in the radio frequency signal, then when the current mode is the first mode, after the second mode is used as the current mode, the control method further includes: Determine whether the current business is ended; If the current service is terminated, the first mode is used as the current mode.

3. The control method according to claim 1, characterized in that: If the energy of the interference signal meets the first preset condition and it is determined that interference exists in the radio frequency signal, then when the current mode is the second mode, the second mode continues to be used as the current mode.

4. The control method according to claim 1, characterized in that: If the energy of the interference signal does not satisfy the first preset condition, it is determined that there is no interference in the radio frequency signal, and when the current mode is the first mode, the first mode continues to be used as the current mode.

5. The method according to any one of claims 1 to 4, characterized in that: Before determining whether the energy of the interference signal in the radio frequency signal processed by the low-noise amplifier circuit in the current mode meets the first preset condition, the control method further includes: Obtain a preset local oscillator signal to mix the radio frequency signal processed by the low-noise amplifier circuit in the current mode; Demodulating the mixed signal to obtain a demodulated signal; Using a filter to filter the demodulated signal to obtain a filtered signal; Calculating the energy of the out-of-band signal of the filtered signal to obtain the energy of the interference signal; The center frequency of the filter is obtained based on the channel bandwidth and the frequency offset of the local oscillator signal.

6. A circuit selection device, characterized in that: It comprises a memory and a processor coupled to each other, the memory stores program instructions, and the processor is used to execute the program instructions to implement the control method according to any one of claims 1 to 5.

7. A receiver, characterized in that: include: A low noise amplifier circuit and a circuit selection device as claimed in claim 6; The low noise amplifier circuit includes at least two LNAs, and the circuit selection device is used to control the conduction of the at least two LNAs to select the first mode or the second mode as the current mode of the low noise amplifier circuit.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the control method according to any one of claims 1 to 5 can be implemented.

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