CN115996062A - Control method of low noise amplifying circuit, processor, receiver and storage medium - Google Patents
Control method of low noise amplifying circuit, processor, receiver and storage medium Download PDFInfo
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- CN115996062A CN115996062A CN202111223021.6A CN202111223021A CN115996062A CN 115996062 A CN115996062 A CN 115996062A CN 202111223021 A CN202111223021 A CN 202111223021A CN 115996062 A CN115996062 A CN 115996062A
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Abstract
The application discloses a control method of a low-noise amplifying circuit, a processor, a receiver and a storage medium, wherein the control method of the low-noise amplifying circuit comprises the following steps: judging whether the energy of an interference signal in the radio frequency signal processed by the low-noise amplifying circuit in the current mode meets a first preset condition or not; the energy of the interference signals meets a first preset condition, and if the interference exists in the radio frequency signals, the second mode is used as the current mode when the current mode is the first mode; or if the energy of the plurality of interference signals does not meet the first preset condition and the interference does not exist in the radio frequency signals, the first mode is used as the current mode when the current mode is the second mode. According to the scheme, the sensitivity can be improved on the premise that the anti-interference performance is not affected.
Description
Technical Field
The present disclosure relates to the field of communications technologies, and in particular, to a method for controlling a low noise amplifying circuit, a processor, a receiver, and a storage medium.
Background
The low noise amplification circuit (Low Noise Amplifier, LNA) is commonly used as a preamplifier for various types of radio receivers, and its sensitivity tends to have a great influence on the communication distance. In addition, in wireless communication, the anti-interference performance is also one of important indexes of wireless communication, and the better the anti-interference performance is, the better the communication quality is generally. In view of this, it is a very valuable task to improve sensitivity without affecting anti-interference performance.
Disclosure of Invention
The technical problem that this application mainly solves is to provide a low noise amplifier circuit's control method and treater, receiver and storage medium, can improve sensitivity under the prerequisite that does not influence interference immunity.
To solve the above problems, a first aspect of the present application provides a control method of a low noise amplifying circuit, including: judging whether the energy of an interference signal in the radio frequency signal processed by the low-noise amplifying circuit in the current mode meets a first preset condition or not; the energy of the interference signals meets a first preset condition, and if the interference exists in the radio frequency signals, the second mode is used as the current mode when the current mode is the first mode; or if the energy of the plurality of interference signals does not meet the first preset condition and the interference does not exist in the radio frequency signals, the first mode is used as the current mode when the current mode is the second mode; the sensitivity of the low-noise amplifying circuit in the first mode is better than that of the low-noise amplifying circuit in the second mode, and the anti-interference performance of the low-noise amplifying circuit in the first mode is inferior to that of the low-noise amplifying circuit in the second mode.
To solve the above-mentioned problem, a second aspect of the present application provides a circuit selection device, where the circuit selection device includes a memory and a processor, and the memory stores program instructions, and the processor is configured to execute the program instructions to implement the control method in the first aspect.
In order to solve the above-mentioned problem, a third aspect of the present application provides a receiver, including a low noise amplifying circuit and a circuit selecting device in the above-mentioned second aspect, where the low noise amplifying circuit includes at least two LNAs, and the circuit selecting device is configured to control conduction of the at least two LNAs to select the first mode or the second mode as a current mode of the low noise amplifying circuit.
In order to solve the above-mentioned problems, a fourth aspect of the present application provides a computer-readable storage medium storing a computer program which, when executed by a processor, implements the control method in the first aspect.
The beneficial effects of this application are: compared with the prior art, the control method provided by the application is characterized in that whether the energy of the interference signals in the radio frequency signals processed by the low-noise amplifying circuit in the current mode meets the first preset condition or not is judged, if yes, the second mode is used as the current mode, or the energy of the interference signals does not meet the first preset condition, if no, the first mode is used as the current mode, the sensitivity of the low-noise amplifying circuit in the first mode is superior to the sensitivity of the low-noise amplifying circuit in the second mode, and the anti-interference performance of the low-noise amplifying circuit in the first mode is inferior to the anti-interference performance of the low-noise amplifying circuit in the second mode, so that the first mode with good sensitivity is selected as the current mode when no interference exists in the radio frequency signals, and the second mode with good anti-interference performance is selected as the current mode when no interference exists in the radio frequency signals, and the anti-interference performance is improved on the premise that the anti-interference performance is not influenced.
Drawings
For a clearer description of the technical solutions in the present application, the drawings required in the description of the embodiments will be briefly described below, it being obvious that the drawings described below are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:
FIG. 1 is a flow chart of an embodiment of a control method of a low noise amplifying circuit of the present application;
FIG. 2 is a schematic diagram illustrating an embodiment of acquiring an interference signal;
FIG. 3 is a flow chart of another embodiment of a control method of the low noise amplifying circuit of the present application;
FIG. 4 is a schematic diagram of a circuit selection device according to an embodiment of the present application;
FIG. 5 is a schematic diagram of a framework of an embodiment of a receiver of the present application;
FIG. 6 is a schematic diagram of a framework of an embodiment of a communications device of the present application;
FIG. 7 is a schematic diagram of a framework of one embodiment of a computer readable storage medium of the present application.
Detailed Description
The following description of the embodiments of the present application, taken in conjunction with the accompanying drawings, will clearly and fully describe the embodiments of the present application, and it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
Referring to fig. 1, fig. 1 is a flow chart illustrating an embodiment of a control method of a low noise amplifying circuit of the present application. Specifically, the method may include the steps of:
step S11: and judging whether the energy of the interference signal in the radio frequency signal processed by the low-noise amplifying circuit in the current mode meets a first preset condition, if so, executing the step S12, otherwise, executing the step S13.
In the embodiment of the disclosure, the low-noise amplifying circuit can work in a first mode or a second mode, the sensitivity of the low-noise amplifying circuit in the first mode is better than that of the low-noise amplifying circuit in the second mode, and the anti-interference performance of the low-noise amplifying circuit in the first mode is inferior to that of the low-noise amplifying circuit in the second mode.
In one implementation scenario, the interference described in the disclosed embodiments of the present application may include interference of interest in wireless communications, e.g., the interference may include, but is not limited to: intermodulation interference, blocking interference, etc., are not limited herein. Intermodulation interference and blocking interference are common interference in wireless communications, and the specific meaning is not described here.
In one implementation scenario, the low noise amplification circuit may include at least two LNAs, and by controlling the LNAs included in the low noise amplification circuit, the mode of operation of the low noise amplification circuit may be controlled. For example, the low noise amplifying circuit may include a first LNA and a second LAN, 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, the second LNA may include, but is not limited to, a single stage LNA, an external LNA and an internal LNA may be included in the dual stage LNA, the single stage LNA may be an external LNA, or the internal LNA is not limited herein.
In one implementation scenario, in the wireless communication process, after the antenna receives the wireless signal, the low noise amplification circuit may process the wireless signal in the current mode to obtain a radio frequency signal, and on the basis of this, may perform energy analysis on the radio frequency signal. Specifically, the processing procedure of the low noise amplifying circuit on the wireless signal may refer to the working principle of the LNA, which is not described herein.
In a specific implementation scenario, a signal obtained by mixing a radio frequency signal processed by a low noise amplifying circuit in a current mode with a preset local oscillator signal, demodulating the mixed signal to obtain a demodulated signal, filtering the demodulated signal with a filter to obtain a filtered signal, and calculating the energy of the out-of-band signal of the filtered signal on the basis of the obtained signal to obtain the energy of an interference signal. The center frequency of the filter is obtained based on the channel bandwidth and the local oscillator signal frequency offset, and specific calculation modes can refer to filter technical details such as a band-pass filter and the like, and are not repeated herein.
Specifically, the local oscillator signal may be a signal generated by a local oscillator in a receiver or a communication device such as an RRU, and the local oscillator signal is used to convert a radio frequency signal by combining with a mixer to obtain a mixed signal, for example, after a radio frequency signal of 900kHz is converted by the mixer by using a local oscillator signal of 1365kHz, mixed signals of 465kHz and 2265kHz may be obtained, and the other cases may be similar, which are not exemplified here.
In addition, in order to facilitate signal processing, the demodulation signal may be subjected to analog-to-digital sampling, so as to obtain a sampling signal, so that the demodulation signal is subjected to filtering processing by using a filter. Referring to fig. 2 in combination, fig. 2 is a schematic state diagram of an embodiment for acquiring an interference signal. Fig. 2 (a) shows an ADC channel filter, so that the demodulated signal can be analog-to-digital sampled in the range-f 1 (kHz) to f1 (kHz). In addition, referring to fig. 2 (b) to 2 (d), the trapezoid with a broken line shows a filter with a center frequency of 4.5kHz, so that the filter filters the sampled signal, a portion of the sampled signal filtered by the filter (i.e., an out-band signal with a center frequency of-6.5 kHz) can be regarded as an interference signal, and a portion of the sampled signal retained by the filter (i.e., an in-band signal with a center frequency of 4.5 kHz) can be regarded as a useful signal. Other situations can be similar and are not exemplified here.
In yet another specific implementation scenario, the energy of the interference signal may specifically include a power value of the interference signal, which is not limited herein.
In one 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 the energy of the interference signal is obtained by analysis, whether the interference signal is within the first preset range may be directly determined to determine whether the interference exists in the radio frequency signal. It should be noted that the first preset range may be specifically set according to an actual situation. For example, a test environment of wireless communication can be built in advance, and energy of interference signals under different conditions can be obtained by testing different conditions such as no interference and different types of interference, so that a first preset range can be determined, and detailed test processes are not repeated here.
Step S12: and if the interference exists in the radio frequency signal, the second mode is used as the current mode when the current mode is the first mode.
In an implementation scenario, as mentioned above, the first preset condition may specifically include that the energy of the interference signal is not within the first preset range, and when 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, it may be determined that there is interference in the radio frequency signal, so when the current mode is the first mode, the switching may be performed to the second mode as the current mode, that is, the switching may be performed to the working mode with better anti-interference performance as the current mode, so as to reduce the interference.
In a specific implementation scenario, the interference signal may specifically include, but is not limited to, intermodulation interference and blocking interference, where when the energy is not within the first preset range, it may be further detected whether the energy is greater than an upper limit value of the first preset range, if so, it may be determined that blocking interference exists in the wireless communication, otherwise, if the energy is neither within nor greater than the upper limit value of the first preset range, the energy is necessarily less than a lower limit value of the first preset range, and in this case, it may be determined that intermodulation interference exists in the wireless communication. Therefore, by detecting whether the energy is greater than the upper limit value of the first preset range or less than the lower limit value of the first preset range, whether intermodulation interference or blocking interference exists in wireless communication can be further determined, and richer reference information can be advantageously provided.
In one implementation scenario, it may be further determined whether the current service (e.g., a call service, a data service, etc.) is finished, and if the current service is finished, the first mode may be switched to be the current mode, that is, the operation mode with better sensitivity is operated before the next service is started, so as to improve the sensitivity as much as possible without affecting the service.
Step S13: and if the radio frequency signal is judged to have no interference, the first mode is used as the current mode when the current mode is the second mode.
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, and 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 may be determined that there is no interference in the radio frequency signal, so when the current mode is the second mode, the first mode may be switched to be used as the current mode, that is, the working mode with better sensitivity is switched to be used as the current mode, so as to improve signal quality.
It should be noted that, the step S12 and the step S13 may be alternatively executed, for example, it may be determined that there is interference in the radio frequency signal when the energy of the interference signal satisfies the first preset condition, and the second mode is used as the current mode when the current mode is the first mode, or it may be determined that there is no interference in the radio frequency signal when the energy of the interference signal does not satisfy the first preset condition, and the first mode is used as the current mode when the current mode is the second mode. Of course, unlike the foregoing embodiment, it is also possible to determine that there is interference in the radio frequency signal when the energy of the interference signal satisfies the first preset condition, and to continue to use the second mode as the current mode when the current mode is the second mode, and to determine that there is no interference in the radio frequency signal when the energy of the interference signal does not satisfy the first preset condition, and to continue to use the first mode as the current mode when the current mode is the first mode.
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 radio frequency signal, and when the current mode is the first mode, after the second mode is used 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 when the first mode is used as the current mode, that is, when it is determined that the interference signal disappears, the low noise amplifying circuit can operate in a high-sensitivity working mode, so that the sensitivity is improved on the premise that the anti-interference performance is not affected.
In a specific implementation scenario, the second preset condition may be set to include that the energy of the interfering signal is within a second preset range. It should be noted that, the second preset range may also be set in a similar manner to the first preset range, which is not described herein. In addition, the upper limit value of the second preset range may 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 may be the same as or different from the lower limit value of the first preset range, and is not limited herein.
In a specific implementation scenario, if the energy of the interference signal does not meet the second preset condition, it may be determined that the interference signal still exists, then the method may temporarily switch to the first mode, acquire the energy of the interference signal in the first mode, and again determine whether the interference signal disappears according to the energy of the interference signal, so as to determine whether to keep in the second mode or switch back to the first mode, which may be specifically described in the following embodiments, and will not be repeated herein.
In one implementation scenario, in order to further improve the sensitivity without affecting the anti-interference performance, the first mode may be periodically selected as a temporary mode of the low noise amplifying circuit and a preset duration of the temporary mode according to a preset time interval when the current mode is the second mode, energy of an interference signal in a signal processed by the low noise amplifying circuit in the temporary mode is obtained, so as to determine whether there is interference in the wireless communication based on the energy, and the first mode or the second mode is selectively switched based on a determination result and the current mode, that is, in a case that 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 a state that the anti-interference performance is not affected and the sensitivity is improved can be continuously maintained in the wireless communication process.
In a specific implementation scenario, the preset time interval may be set according to a shortest period required for analyzing whether there is interference, and may specifically be set to 3s, 5s, 10s, etc., which is not limited herein.
In a specific implementation scenario, the preset duration may be set according to the shortest duration required to acquire the energy of the interference signal, and may specifically be set to 20ms, 30ms, 40ms, and so on, which is not limited herein.
In a specific implementation scenario, the specific process of acquiring the energy of the interference signal may refer to the foregoing related description, which is not repeated herein.
In yet another implementation scenario, the reception sensitivity is significantly improved, but the anti-interference performance is not significantly changed, by testing, compared with before and after using the embodiments of the present disclosure. Referring specifically to table 1, table 1 is a sensitivity and anti-interference performance test result table:
TABLE 1 sensitivity and anti-interference performance test results table
| Test item | After utilizing the embodiment of the present disclosure | Before utilizing 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 |
| Co-channel suppression (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 (+1 MHz) | 92 | 93 |
| Blocking (+2 MHz) | 92 | 93 |
| Blocking (+5 MHz) | 92 | 93 |
| Blocking (+ 10 MHz) | 92 | 93 |
| Blocking (-1 MHz) | 92 | 93 |
| Blocking (-2 MHz) | 92 | 93 |
| Blocking (-5 MHz) | 92 | 93 |
| Blocking (-10 MHz) | 92 | 93 |
| Intermodulation interference (high side) | 67 | 67.6 |
| Intermodulation interference (Low side) | 67.2 | 67.8 |
It should be noted that, in table 1, adjacent channel selectivity, co-channel suppression, blocking, and intermodulation interference are all evaluation indexes of anti-interference performance, and it can be found by comparing that before and after the embodiments of the present disclosure are utilized, the evaluation indexes do not change significantly, part of the evaluation indexes do not change even, the sensitivity changes significantly before and after the embodiments of the present disclosure are utilized, 2.4dB is improved under 5% of the maximum available sensitivity, and even 3.4dB is improved entirely under 1% of the maximum available sensitivity, and the sensitivity improving effect is significant.
In addition, the embodiments of the present disclosure and the embodiments of the disclosure described below are particularly applicable to wireless communication modes such as PDT (Police Digital Trunking ), DMR (Digital Mobile Radio, digital mobile radio), and the like, and are not limited herein.
According to the scheme, whether the energy of the interference signals in the radio frequency signals processed by the low-noise amplifying circuit in the current mode meets the first preset condition or not is judged, if yes, the second mode is used as the current mode when the current mode is the first mode, or the energy of the interference signals does not meet the first preset condition, if no, the first mode is used as the current mode when the current mode is the second mode, and the sensitivity of the low-noise amplifying circuit in the first mode is superior to that of the low-noise amplifying circuit in the second mode, and the anti-interference performance of the low-noise amplifying circuit in the first mode is inferior to that of the low-noise amplifying circuit in the second mode, so that the first mode with good anti-interference performance is selected as the current mode when no interference exists in the radio frequency signals, and the second mode with good anti-interference performance is selected as the current mode when interference exists in the radio frequency signals, and the anti-interference performance can be improved on the premise that the anti-interference performance is not influenced. In addition, the sensitivity can be improved on the premise of not influencing the anti-interference performance by only switching the working mode of the low-noise amplifying circuit in the wireless communication process without adding an additional electronic circuit, so that the cost can be reduced.
Referring to fig. 3, fig. 3 is a flowchart illustrating a control method of the low noise amplifying circuit according to another embodiment of the present application. Specifically, the method may include the steps of:
step S301: and (5) starting up and initializing.
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), and specific configurations may refer to the following disclosed embodiments, which are not described herein in detail.
Step S302: the first mode is used as a current mode of the low noise amplifying circuit.
Specifically, at the time of starting up, the first mode may be defaulted as the current mode of the low noise amplifying circuit, or at the time of starting communication, the first mode may be defaulted as the current mode of the low noise amplifying circuit, and as described in the foregoing disclosure embodiments, since the sensitivity of the low noise amplifying circuit in the first mode is better than the sensitivity of the low noise amplifying circuit in the second mode, and the anti-interference performance of the low noise amplifying circuit in the first mode is inferior to the anti-interference performance of the low noise amplifying circuit in the second mode, the energy of the interference signal in the processed radio frequency signal is acquired in the first mode, which has a better reference value for judging whether the interference exists in the wireless communication, thereby being capable of helping to improve the accuracy of circuit control.
In addition, for the specific relationship between the first mode, the second mode and the low noise circuit, reference may be made to the related description in the foregoing disclosed embodiments, and the detailed description is omitted herein.
Step S303: and obtaining an analysis result about whether interference exists in the radio frequency signal based on whether the energy of the interference signal in the radio frequency signal processed by the low-noise amplifying circuit in the first mode meets a first preset condition.
Specifically, the first preset condition may be set such that the energy of the interference signal is not within the first preset range, and if the energy of the interference signal meets the first preset condition, that is, if 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, whereas if the energy of the interference signal does not meet the preset condition, that is, if 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. Regarding the setting manner of the first preset range and the process of obtaining the energy of the interference signal, reference may be made to the related description in the foregoing disclosed embodiments, which is not repeated herein.
Step S304: and judging whether the analysis result comprises interference, if not, executing step S305, otherwise, executing step S306.
Step S305: when the current mode is the second mode, the first mode is used as the current mode, and when the current mode is the first mode, the first mode is used as the current mode continuously.
Specifically, since the analysis result includes no interference, when the current mode is the second mode with better anti-interference performance and worse sensitivity, the first LAN can be selectively turned on, and the first mode with better sensitivity is used as the current mode, and accordingly, when the current mode is the first mode with better sensitivity, the first mode with better sensitivity can be continuously used as the current mode, so that the sensitivity can be improved without affecting the anti-interference performance.
Step S306: and when the current mode is the first mode, the second mode is used as the current mode, and when the current mode is the second mode, the second mode is used as the current mode continuously.
Specifically, since the analysis result includes that interference exists, when the current mode is the first mode with better sensitivity and poorer anti-interference performance, the second LAN can be selected to be conducted, the second mode with better anti-interference performance is used as the current mode, and correspondingly, when the current mode is the second mode with better anti-interference performance, the second mode can be continuously used as the current mode, so that interference is effectively restrained by the second mode with better anti-interference performance, and the communication quality is improved.
In addition, whether the current service is ended can be judged, if the current service is ended, the first mode with better sensitivity can be used as the current mode, and therefore the sensitivity can be improved on the premise that the service is not influenced. Reference may be made specifically to the foregoing descriptions of the disclosed embodiments, and details are not repeated herein.
Step S307: the first mode is periodically selected as a temporary mode of the low noise amplifying circuit at preset time intervals.
Specifically, in the case that the current mode is the second mode, the first mode may be periodically selected as the temporary mode of the low noise amplifying circuit according to a preset time interval, and a specific setting manner of the time interval may refer to the related description in the foregoing disclosed embodiment, which is not repeated herein.
In the process of executing step S307, it may be further determined whether the current service is ended, and if the current service is ended, the first mode may be switched to be the current mode, that is, the operation mode with better sensitivity is operated before the next service is started, so as to improve the sensitivity as much as possible without affecting the service.
Step S308: the energy of the interference signal in the signal processed in the temporary mode by the low noise amplifying circuit is obtained.
The specific analysis process may refer to the related description in the foregoing disclosed embodiments, and will not be described herein. It should be noted that, as described in the foregoing disclosure embodiment, the analysis result may be specifically determined by obtaining whether the energy of the interference signal in the radio frequency signal is within the second preset range, in the actual application process, if the current mode is the first mode, the first preset range adopted by whether the interference exists is analyzed, and if the current mode is the second mode, the second preset range adopted by whether the interference signal is eliminated is analyzed, where the two may be the same or different, and the two may not be limited herein.
It should be noted that, after the temporary operation is performed in the first mode for a preset period of time and before the analysis of the energy of the interference signal is performed, whether there is any interference in the wireless communication is not yet determined, so as to avoid the interference that is still performed in the first mode due to the fact that there is still interference in the wireless communication, so that the anti-interference performance is reduced, and the method may switch back to the second mode after the temporary mode is maintained for the preset period of time.
Step S309: and judging whether the energy of the interference signal meets a second preset condition, if so, executing the step S310, otherwise, executing the step S311.
Specifically, the second preset condition may be set to include that the energy of the interference signal is within the second preset range, and then in a case where the energy of the interference signal satisfies the second preset condition, that is, when the energy of the interference signal is within the second preset range, the interference signal may be considered to disappear, whereas the interference signal may be considered to have not yet disappeared. In addition, regarding the setting manner of the second preset range, reference may be made to the related description in the foregoing disclosed embodiments, which is not repeated herein.
Step S310: and if the interference signal is judged to disappear, the first mode is taken as the current mode.
Specifically, since it is determined that the interference has disappeared, the first mode having better sensitivity can be switched as the current mode, so that the sensitivity can be improved without affecting the anti-interference performance.
Step S311: step S303 and subsequent steps are re-executed.
Specifically, since the first mode is switched back to the current mode when the interference disappears, in this case, the energy of the current interference signal can be obtained in the first mode, and based on this, whether there is interference is determined to determine whether to switch the working mode, and detailed description thereof will be omitted herein.
Step S312: and judging that the interference signal has not disappeared, and keeping the second mode as the current mode.
Specifically, since it is determined that the disturbance has not disappeared, the second mode may be kept as the current mode. Reference may be made specifically to the foregoing descriptions of the disclosed embodiments, and details are not repeated herein.
Step S313: step S307 and subsequent steps are re-executed.
In particular, in case the interference has not disappeared, the first mode may be switched again temporarily to continuously detect whether the interference has disappeared.
In contrast to the foregoing embodiment, at the time of power-on initialization, the first mode is selected as the current mode, and based on whether the energy of the interference signal in the radio frequency signal processed by the low noise amplification circuit in the current mode satisfies the first preset condition, an analysis result is obtained, so that if the analysis result includes that the interference does not exist, and when the current mode is the second mode, the first mode is taken as the current mode, and if the analysis result includes that the interference exists, and when the current mode is the first mode, the second mode is taken as the current mode, and the first mode is periodically selected as a temporary mode of the low noise amplification circuit at preset time intervals, the energy of the interference signal in the signal processed by the low noise amplification circuit in the temporary mode is obtained, and whether the energy of the interference signal satisfies the second preset condition is determined, so that the interference signal disappears is determined when the second preset condition is satisfied, and when the first mode is the second preset condition is not satisfied, the interference signal does not disappear is determined to be the second mode, and when the second mode is not satisfied, the second mode is taken as the current mode, and the first mode is temporarily switched over again, and whether the interference is always influenced is not continuously, and the wireless communication can be continuously performed is improved.
Referring to fig. 4, fig. 4 is a schematic diagram illustrating an embodiment of a circuit selection device 40 according to the present application. The circuit selection means 40 comprise a memory 41 and a processor 42 coupled to each other, the memory 41 storing program instructions, the processor 42 being capable of implementing the steps of any of the control method embodiments described above when executing a computer program.
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 signal processing capabilities. The processor 42 may also be a general purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a Field programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. In addition, the processor 42 may be commonly implemented by a plurality of integrated circuit chips.
In the embodiment of the present disclosure, the processor 42 is configured to determine whether the energy of the interference signal in the radio frequency signal processed by the low noise amplifying circuit in the current mode meets a first preset condition; the processor 42 is configured to determine that there is interference in the radio frequency signal when the energy of the interference signal meets a first preset condition, and when the current mode is the first mode, take the second mode as the current mode; or, the processor 42 is configured to determine that there is no interference in the radio frequency signal if the energy of the interference signal does not meet the first preset condition, and when the current mode is the second mode, take the first mode as the current mode; the sensitivity of the low-noise amplifying circuit in the first mode is better than that of the low-noise amplifying circuit in the second mode, and the anti-interference performance of the low-noise amplifying circuit in the first mode is inferior to that of the low-noise amplifying circuit in the second mode.
According to the scheme, under the condition that interference does not exist in the radio frequency signal, the first mode with good sensitivity is selected as the current mode, and under the condition that interference exists 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 on the premise that the anti-interference performance is not affected. In addition, the sensitivity can be improved on the premise of not influencing the anti-interference performance by only switching the working mode of the low-noise amplifying circuit in the wireless communication process without adding an additional electronic circuit, so that the cost can be reduced.
In some disclosed embodiments, the processor 42 is configured to determine whether the energy of the interfering signal satisfies a second preset condition; the processor 42 is configured to determine that the interference signal disappears when the energy of the interference signal satisfies the second preset condition, and take the first mode as the current mode.
Therefore, by judging whether the energy of the interference signal meets the second preset condition or not, and judging that the interference signal disappears when the energy of the interference signal meets the second preset condition, and taking the first mode as the current mode, the low-noise amplifying circuit can work in the first mode with better sensitivity when the interference disappears, and the sensitivity can be improved on the premise of not influencing the anti-interference performance.
In some disclosed embodiments, the processor 42 is configured to periodically select the first mode as a temporary mode of the low noise amplifying circuit at preset time intervals; the processor 42 is configured to obtain energy of the interference signal in the signal processed in the temporary mode by the low noise amplifying circuit.
Therefore, under the condition that the low-noise amplifying circuit works in the second mode with better anti-interference performance, the first mode is periodically selected as the temporary mode of the low-noise amplifying circuit according to the preset time interval, and the energy of the interference signal in the signal processed by the low-noise amplifying circuit in the temporary mode is obtained, so that the first mode with better sensitivity can be temporarily switched, the accuracy of the energy of the interference signal can be improved, and the accuracy of circuit control can be improved.
In some disclosed embodiments, the processor 42 is configured to determine whether the current service is complete; the processor 42 is configured to take the first mode as the current mode in case the current service ends.
Therefore, when the current service is finished, the first mode with better sensitivity is operated, and the sensitivity can be improved on the premise of not influencing the normal service.
In some disclosed embodiments, the processor 42 is configured to, if the energy of the interference signal satisfies the first preset condition, determine that there is interference in the radio frequency signal, and when the current mode is the second mode, continue to use the second mode as the current mode.
Therefore, when the energy of the interference signal meets the first preset condition, it is determined that the interference exists in the radio frequency signal, and when the current mode is the second mode, the second mode is continuously used as the current mode, namely, when the interference exists and the interference signal works in the second mode with better anti-interference performance, the second mode is continuously used as the current mode, and the anti-interference performance can not be affected.
In some disclosed embodiments, the processor 42 is configured to, if the energy of the interference signal does not meet the first preset condition, determine that there is no interference in the radio frequency signal, and when the current mode is the first mode, continue to use the first mode as the current mode.
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 radio frequency signal, and when the current mode is the first mode, the first mode is continuously used as the current mode, that is, when there is no interference and the radio frequency signal is operated in the first mode with better sensitivity, the first mode is continuously used as the current mode, so that the sensitivity can be improved on the premise of not affecting the anti-interference performance.
In some disclosed embodiments, the processor 42 is configured to obtain a signal obtained by mixing a radio frequency signal processed by the low noise amplifying circuit in the current mode with a preset local oscillation signal; the processor 42 is configured to perform demodulation processing on the mixed signal to obtain a demodulated signal; the processor 42 is configured to perform filtering processing on the demodulated signal by using a filter, so as to obtain a filtered signal; the processor 42 is configured to calculate energy of the out-of-band signal of the filtered signal to obtain 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 oscillation signal.
Therefore, the preset local oscillator signal is obtained to carry out frequency mixing on the radio frequency signal processed by the low noise amplifying circuit in the current mode, the frequency mixing signal is demodulated to obtain a demodulated signal, the filter is utilized to carry out filtering processing on the demodulated signal to obtain a filtered signal, the energy of the out-of-band signal of the filtered signal is calculated to obtain the energy of the interference signal, and the center frequency of the filter is obtained based on the channel bandwidth and the frequency offset of the local oscillator signal, so that the energy of the interference signal can be obtained only through frequency mixing, filtering and other processing, and the complexity of obtaining the signal energy of the interference signal can be reduced.
Referring to fig. 5, fig. 5 is a schematic diagram illustrating an embodiment of a receiver 50 of the present application. As shown in fig. 5, the receiver 50 includes a low noise amplifying circuit 51 and a circuit selecting device 52, the low noise amplifying circuit 51 includes at least two LNAs 511, and the circuit selecting device 52 is a circuit selecting device in any of the above disclosed embodiments of the circuit selecting device, and the circuit selecting device 52 is configured to control the conduction of the at least two LNAs 511 to select the first mode or the second mode as the current mode of the low noise amplifying circuit 51.
In one implementation scenario, as described in the foregoing disclosure, the at least two LNAs 511 included in the low noise amplifying circuit 51 may include a first LNA (not shown) and a second LNA (not shown), where the first LNA may include, but is not limited to, a dual stage LNA, the second LNA may include, but is not limited to, a single stage LNA, the dual stage LNA may include an external LNA and an internal LNA, the single stage LNA may include an external LNA, the internal LNA may be a low noise amplifying circuit integrated inside a chip such as an ADC, and the external LNA may be a low noise amplifying circuit disposed outside the chip such as an ADC, which is not limited herein.
The above-described scheme can improve the sensitivity of the receiver 50 without affecting the anti-interference performance of the receiver 50.
Referring to fig. 6, fig. 6 is a schematic diagram illustrating an embodiment of a communication device 60 of the present application. The communication device 60 comprises an antenna 61, a transmitter 62, a receiver 63 as in any of the receiver embodiments described above, and a diplexer 64, wherein the antenna 61 is connected to an antenna connection 641 of the diplexer 64, the receiver 63 is connected to a signal output 642 of the diplexer 64, and the transmitter 62 is connected to a signal input 643 of the diplexer 64. In particular, the communication device 60 may include, but is not limited to, an RRU or the like, and is not limited herein.
In the above-mentioned scheme, the communication device 60 adopts the receiver 63 in any of the receiver embodiments, so that the sensitivity of the communication device 60 can be improved without affecting the anti-interference performance of the communication device 60.
Referring to FIG. 7, FIG. 7 is a schematic diagram illustrating an embodiment of a computer readable storage medium 70 according to the present application. The storage means 70 stores program instructions 71 executable by the processor, the program instructions 71 being for implementing the steps of any of the control method embodiments described above.
According to the scheme, under the condition that interference does not exist in the radio frequency signal, the first mode with good sensitivity is selected as the current mode, and under the condition that interference exists 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 on the premise that the anti-interference performance is not affected. In addition, the sensitivity can be improved on the premise of not influencing the anti-interference performance by only switching the working mode of the low-noise amplifying circuit in the wireless communication process without adding an additional electronic circuit, so that the cost can be reduced.
In the several embodiments provided in the present application, it should be understood that the disclosed methods and apparatus may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of modules or units is merely a logical functional division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical, or other forms.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the embodiment.
In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in part or all or part of the technical solution contributing to the prior art or in the form of a software product stored in a storage medium, including several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to perform all or part of the steps of the methods of the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
Claims (10)
1. A control method of a low noise amplification circuit, the control method comprising:
judging whether the energy of an interference signal in the radio frequency signal processed by the low-noise amplifying circuit in the current mode meets a first preset condition or not;
If the energy of the interference signal meets a first preset condition, judging that the radio frequency signal has interference, and taking a second mode as the current mode when the current mode is a first mode;
or if the energy of the interference signal does not meet a first preset condition, judging that the radio frequency signal has no interference, and taking a first mode as the current mode when the current mode is a second mode;
the sensitivity of the low-noise amplifying circuit in the first mode is better than that of the low-noise amplifying circuit in the second mode, and the anti-interference performance of the low-noise amplifying circuit in the first mode is inferior to that of the low-noise amplifying circuit in the second mode.
2. The control method according to claim 1, wherein if the energy of the interference signal satisfies a first preset condition, and it is determined that there is interference in the radio frequency signal, when the current mode is the first mode, and after taking the second mode as the current mode, the control method further includes:
judging whether the energy of the interference signal meets a second preset condition or not;
and if the energy of the interference signal meets a second preset condition, judging that the interference signal disappears, and taking a first mode as the current mode.
3. The control method according to claim 2, wherein before the determining whether the energy of the interfering signal satisfies the second preset condition, the control method further includes:
periodically selecting a first mode as a temporary mode of the low noise amplifying circuit according to a preset time interval;
the energy of the interference signal in the signal processed by the low noise amplifying circuit in the temporary mode is obtained.
4. The control method according to claim 1, wherein if the energy of the interference signal satisfies a first preset condition, and it is determined that there is interference in the radio frequency signal, when the current mode is the first mode, and after taking the second mode as the current mode, the control method further includes:
judging whether the current service is ended or not;
and if the current service is ended, taking a first mode as the current mode.
5. The control method according to claim 1, wherein if the energy of the interference signal satisfies a first preset condition, it is determined that there is interference in the radio frequency signal, and when the current mode is the second mode, the second mode is continued as the current mode.
6. The control method according to claim 1, wherein if the energy of the interference signal does not meet a first preset condition, and it is determined that there is no interference in the radio frequency signal, continuing to use the first mode as the current mode when the current mode is the first mode.
7. The method according to any one of claims 1 to 6, wherein before determining whether the energy of the interference signal in the radio frequency signal processed by the low noise amplifying circuit in the current mode satisfies the first preset condition, the control method further comprises:
acquiring a preset local oscillation signal and mixing the radio frequency signal processed by the low-noise amplifying circuit in the current mode;
demodulating the mixed signals to obtain demodulated signals;
filtering the demodulation signal by using a filter 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 oscillation signal.
8. A circuit selection device comprising a memory and a processor coupled to each other, the memory storing program instructions, the processor for executing the program instructions to implement the control method of any one of claims 1 to 7.
9. A receiver, comprising: a low noise amplifying circuit and the circuit selecting means as defined in claim 8; the low noise amplifying circuit comprises at least two LNAs, and the circuit selecting device is used for controlling the conduction of the at least two LNAs so as to select a first mode or a second mode as a current mode of the low noise amplifying circuit.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program which, when executed by a processor, implements the control method of any one of claims 1 to 7.
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| CN202111223021.6A CN115996062A (en) | 2021-10-20 | 2021-10-20 | Control method of low noise amplifying circuit, processor, receiver and storage medium |
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