CN114765846B - Method and related device for improving adjacent channel selectivity - Google Patents
Method and related device for improving adjacent channel selectivity Download PDFInfo
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- CN114765846B CN114765846B CN202110048981.7A CN202110048981A CN114765846B CN 114765846 B CN114765846 B CN 114765846B CN 202110048981 A CN202110048981 A CN 202110048981A CN 114765846 B CN114765846 B CN 114765846B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/245—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account received signal strength
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/52—TPC using AGC [Automatic Gain Control] circuits or amplifiers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The application discloses a method for improving adjacent channel selectivity, which comprises the following steps: acquiring a first parameter of a current received signal of a receiver; the first parameter includes signal strength or signal power; judging whether the first parameter is larger than a first threshold value or not, wherein the first threshold value corresponds to the first parameter setting; if yes, determining a target gain value according to the first parameter, and adjusting the gain of a programmable gain amplifier of the communication device to the target gain value. The technical scheme provided by the application can improve the adjacent channel selectivity of the receiver on the premise of not increasing the hardware cost investment. The application also provides a communication device and a computer readable storage medium.
Description
Technical Field
The present disclosure relates to the field of communications technologies, and in particular, to a method and an apparatus for improving adjacent channel selectivity.
Background
In intercom communication, one of the transmitted signals is a transmitter and one of the received signals is a receiver, both the transmitter and the receiver having their nominal operating frequency bands. However, in the superheterodyne reception scheme, adjacent channel selectivity is seriously deteriorated as the amplitude of the useful signal increases. When the transfer platform works, the power of the hand platform can easily enable the signal amplitude to enter a strong signal range, so that the conversation quality and experience effect of clients can be seriously affected. In the prior art, the technical problems are solved by modifying the PCB to increase the circuit design and the devices, but this increases the investment of hardware cost to a certain extent, which is not suitable for mass production, so a solution is needed that does not increase the investment of hardware cost and can solve the technical problems.
Disclosure of Invention
The technical problem that this application mainly solves is to provide a method and relevant device that promotes adjacent channel selectivity, can realize promoting communication device adjacent channel selectivity under the prerequisite that does not increase hardware cost.
In order to solve the technical problems, one technical scheme adopted by the application is as follows: a method of improving adjacent channel selectivity is provided, the method comprising:
acquiring a first parameter of a current received signal of a communication device; the first parameter includes signal strength or signal power;
judging whether the first parameter is larger than a first threshold value or not, wherein the first threshold value corresponds to the first parameter setting;
if yes, determining a target gain value according to the first parameter, and adjusting the gain of a programmable gain amplifier of the communication device to the target gain value.
In order to solve the technical problems, another technical scheme adopted by the application is as follows: there is provided a communication apparatus including: a programmable gain amplifier and a processor;
the control end of the programmable gain amplifier is connected with the processor and is used for performing gain processing on the received signal with a gain value being a target gain value under the control of the processor;
The processor is connected with the control end of the programmable gain amplifier, and is used for executing the method to determine the target gain value, generating a control instruction corresponding to the target gain value, and sending the control instruction to the programmable gain amplifier to adjust the gain value of the programmable gain amplifier.
In order to solve the technical problem, another technical scheme adopted by the application is as follows: there is provided a computer readable storage medium storing a computer program executable by a processor for implementing a method of improving adjacent channel selectivity as described above.
The beneficial effects of this application are: different from the situation of the prior art, the technical scheme provided by the application is that the first parameter of the current received signal of the communication device is obtained, the first parameter comprises signal strength or signal power, and whether the first parameter is larger than a first threshold value or not is judged, namely whether the current received signal is a large signal or not is judged. If the first parameter is larger than the large signal of the first threshold value, the target gain value is determined according to the first parameter of the current received signal, and the target gain value is dynamically determined according to the first parameter when the first parameter is larger, namely, the gain of a programmable gain amplifier in the communication device is adjusted to improve the adjacent channel selectivity.
Drawings
FIG. 1 is a flow chart illustrating a method for improving adjacent channel selectivity according to an embodiment of the present disclosure;
FIG. 2 is a schematic flow chart of another embodiment of a method for improving adjacent channel selectivity according to the present application;
FIG. 3 is a flow chart illustrating a method for improving adjacent channel selectivity according to another embodiment of the present disclosure;
FIG. 4 is a schematic flow chart of another embodiment of a method for improving adjacent channel selectivity according to the present application;
FIG. 5 is a flow chart illustrating a method for improving adjacent channel selectivity according to another embodiment of the present disclosure;
FIG. 6 is a schematic flow chart diagram illustrating a method for improving adjacent channel selectivity according to another embodiment of the present application;
FIG. 7 is a schematic diagram of a communication device according to an embodiment of the present application;
FIG. 8 is a schematic structural diagram of an embodiment of a computer readable storage medium according to the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not limiting. 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.
In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
Referring to fig. 1, fig. 1 is a flow chart illustrating an embodiment of a method for improving adjacent channel selectivity according to the present application. The method provided by the application is implemented in the communication device, so that the adjacent channel selectivity (ACS: adjacent Channel Selectivity) of the communication device can be better improved under the condition that the structure of the communication device is not changed. Specifically, the method provided by the present application is performed by a processor in a communication device. It should be noted that, the communication device mentioned in the present application includes at least a receiver function, and it is understood that, in some embodiments, the communication device provided in the present application may also include both a receiver function and a transmitter function. In the current embodiment, the method provided by the present application includes:
S110: a first parameter of a currently received signal of the communication device is obtained.
When the communication device works to receive an external signal, a first parameter of a current received signal of the communication device is acquired. Wherein the first parameter comprises signal strength or signal power.
In an embodiment, when the first parameter is signal strength, step S110 may determine the signal strength of the currently received signal by monitoring the output level of the RSSI. Wherein, the output level of the RSSI can be monitored in real time; the RSSI can be periodically monitored according to a set period and the RSSI can be obtained at a monitoring time point; or the RSSI is monitored in real time, and the RSSI is acquired according to a set period. Where RSSI (Received Signal Strength Indication) is a received signal strength indication, the signal strength of the currently received signal is the value of the RSSI level. Specifically, the processor may be a value of the RSSI level obtained through IQ signal calculation. The process of calculating the RSSI level by IQ signals is referred to in the prior art and will not be described in detail herein.
Further, when the RSSI is monitored in real time according to the setting and the RSSI is obtained according to the set period, in order to obtain a more accurate RSSI, the period duration is set to be a relatively smaller period, the RSSI level value in the period before the current sampling time point is averaged, and the obtained average value is output as the RSSI of the current sampling time.
Further, in an embodiment, obtaining the signal strength of the current received signal includes: and demodulating the current received signal to obtain an IQ signal. The signal processing unit may be configured to obtain the IQ signal by demodulating the received radio frequency signal with a baseband chip, and then directly read the strength of the IQ signal with a processor after demodulating the current received signal.
After the IQ signal is obtained, the signal strength of the current received signal is further calculated based on the IQ signal strength. After the IQ signal strength is obtained, the power of the currently received signal may be calculated from the IQ signal strength. Specifically, in the present embodiment, the conversion formula of IQ signal strength and power of the received signal may be obtained by using a conventional conversion formula of signal strength and signal power dbm=10log (P), where Dbm represents the strength unit of the signal and P represents the signal power.
Further, demodulating the current received signal to obtain an IQ signal further includes: and carrying out quadrature demodulation on the current received signal to obtain two paths of IQ signals, and carrying out ADC (Analog-to-digital converter) sampling processing on the IQ signals to obtain baseband IQ signals. Correspondingly, after the baseband IQ signal is obtained, the first parameter of the currently received signal is further determined based on the baseband IQ first parameter. The processor in the communication device provided in the present application includes a DSP, and it is understood that in other embodiments, the processor may also include other types of processing chips, which are not limited herein.
In another embodiment, when the first parameter includes signal power, after obtaining signal power of a current received signal of the current communication device, it is further determined whether the signal power is greater than a first threshold, if so, a target gain value is determined according to the signal power, and the gain of the programmable gain amplifier of the communication device is adjusted to the target gain value, otherwise, the gain of the programmable gain amplifier is adjusted to a preset gain value.
S120: it is determined whether the first parameter is greater than a first threshold.
After acquiring the first parameter of the current received signal of the communication device, further judging whether the first parameter of the current received signal is greater than a first threshold, and if so, further executing the following step S130; otherwise, if the first parameter is less than or equal to the first threshold, the automatic gain adjustment function is adjusted to be in the off state, and the gain of the programmable gain amplifier of the communication device is adjusted to be a preset gain value.
The first threshold is a comparison value preset corresponding to the first parameter, which can be understood as a reference value for judging whether the communication device needs to be set to adjust the gain value of the programmable gain amplifier according to the first parameter of the current received signal. The first threshold may be set according to a performance parameter of the communication device, e.g. the first thresholds of different series and/or different parameters of the communication device are different, e.g.: the first threshold may be a signal reception strength corresponding to saturation of the data sampling ADC allowed by the communication device in the superheterodyne reception scheme.
For example, in an embodiment, when the first parameter is signal strength, the first threshold is a comparison value set corresponding to the signal strength, that is, the unit of the first threshold is the same as the unit of the signal strength. In another embodiment, when the first parameter is signal power, the first threshold is a comparison value set corresponding to the signal power, that is, the unit of the first threshold is the same as the unit of the signal power.
S130: and determining a target gain value according to the first parameter, and adjusting the gain of a programmable gain amplifier of the communication device to the target gain value.
If the first parameter is greater than the first threshold, it is determined that the communication device is currently required to be set, and the gain value of the programmable gain amplifier is adjusted according to the first parameter of the current received signal. The target gain value is determined according to the current first parameter, and the gain of the programmable gain amplifier of the communication device is adjusted to the target gain value, so that the adjacent channel selectivity of the communication device is improved, and the adjacent channel selectivity of the communication device can meet the set requirement.
Further, after the target gain value is determined, a control instruction corresponding to the target gain value is generated and sent to the programmable gain amplifier, so that the programmable gain amplifier responds to the control instruction, and the gain of the programmable gain amplifier is adjusted to the target gain value, so that the adjacent channel selectivity of the communication device meets the set requirement, namely, the adjacent channel selectivity is improved, and the communication quality is further ensured.
Further, after the target gain value is determined, and the gain of the programmable gain amplifier of the communication device is adjusted to the target gain value, the current gain value of the programmable gain amplifier stored in the processor is updated by using the newly determined target gain value, so that the latest current gain value is directly read and invoked when the target gain value is determined next time.
Further, referring to fig. 2, fig. 2 is a flow chart illustrating another embodiment of a method for improving adjacent channel selectivity according to the present application. In the present embodiment, the first parameter includes signal strength, and determining the target gain value according to the first parameter in the step S130 further includes a step S201 and a step S202.
S201: based on the signal strength, the power of the currently received signal is determined.
In the present embodiment, the process of calculating the power of the received signal according to the signal strength of the received signal is as follows: and calculating according to a conversion formula of the signal strength and the power of the signal to obtain the power of the received signal. The formula of signal intensity and signal power conversion is as follows: the ebm=10log (P), where E refers to signal strength, E may also be understood as a level value of RSSI (where the conversion relationship between signal strength and RSSI is one-to-one), dbm represents a unit of signal strength, and P represents power of a signal.
Further, in the present embodiment, step S201 is to determine the power of the currently received signal according to the IQ signal strength. The RSSI is actually level strength for the IQ signal, so that the power of the received signal corresponding to the current signal strength (i.e., the current RSSI) can be obtained directly through the RSSI lookup table after the RSSI of the current received signal of the communication device is obtained in the follow-up mode by writing the RSSI and the power of the received signal into the table in a one-to-one correspondence manner and storing the same.
In other embodiments, the RSSI and the received signal power may also be calculated in real time. Specifically, the RSSI is calculated as follows: the phase of the IQ signal is averaged and then squared to obtain the RSSI, and then the power of the received signal is calculated based on the RSSI.
The IQ signals are obtained by demodulating radio frequency signals of a radio frequency front section through a baseband chip, two paths of IQ signals are obtained through quadrature demodulation of the radio frequency signals, ADC sampling processing is respectively carried out on the two paths of IQ signals to obtain digital IQ signals, namely baseband IQ signals, and then the power of the current received signals can be obtained through RSSI query tables of the IQ signals. The table is a preset RSSI-to-received signal power comparison table, in which one RSSI corresponds to only one received signal power.
S202: a target gain value is determined using the power of the currently received signal.
After the power of the received signal is calculated, the target gain value is determined using the power of the current received signal.
Further, in order to make the gain adjustment of the communication device more accurate, in the present embodiment, different gain calculation modes are set according to the section where the power of the received signal is located, so after the power of the received signal is obtained, the target gain value is obtained correspondingly according to the gain calculation mode of the section where the power of the received signal is located. Specifically, after calculating the power of the received signal, firstly determining the section where the power of the current received signal is located, then determining the gain calculation mode of the current section, and then determining the target gain value by using the gain calculation mode corresponding to the current section.
The method can be divided into two sections by presetting a reference signal power, and different gain calculation modes are set for each section. Therefore, after determining the power of the received signal, it is further determined whether the power of the received signal is in a section greater than the power of the reference signal or in a section less than the power of the reference signal, and then a corresponding gain calculation mode is determined based on the determined section where the power of the received signal is located. And finally, calculating a target gain value based on a gain calculation mode of a section where the power of the current received signal is.
In another embodiment, a plurality of reference signal powers may be preset, so as to divide a plurality of segments, and different gain calculation modes may be set for each segment. Therefore, after determining the power of the received signal, determining the section where the power of the received signal is located and the gain calculation mode of the section where the power of the received signal is located, and calculating the target gain value based on the determined gain calculation mode. The number of reference signal powers to be set is specifically set according to actual requirements, and is not limited herein.
Further, referring to fig. 3, fig. 3 is a flow chart illustrating a method for improving adjacent channel selectivity according to another embodiment of the present application. In the present embodiment, the step S202 of determining the target gain value by using the power of the currently received signal further includes steps S301 to S302.
S301: a first difference between the power of the current received signal and the reference signal power is obtained.
After determining the power of the current received signal, a first difference between the power of the current received signal and the reference signal power is further obtained. The first difference is a value of a phase difference between the power of the current received signal and the power of the reference signal, which is a result of subtracting a smaller value from a larger value, and may be understood as an absolute value of a difference between the power of the current received signal and the power of the reference signal. If the power of the current received signal is greater than the reference signal power, the first difference is equal to the result of subtracting the reference signal power from the power of the current received signal; if the power of the current received signal is less than the reference signal power, the first difference is equal to the reference signal power minus the power of the current received signal. It should be noted that, if the unit of the power of the current received signal is the same as the reference signal power, if the unit of the power of the current received signal is different from the reference signal power, the power of the current received signal is further converted into the same expression as the reference signal power unit.
Further, in an embodiment, the reference signal power is a target value of a predetermined detected power, and the reference signal power may be set to an integer value, and the corresponding first difference value is also an integer value. It will be appreciated that in other embodiments, the reference signal power may be a non-integer value, particularly subject to actual settings.
S302: a target gain value is determined based on the first difference and a current gain value of the programmable gain amplifier.
After the first difference between the power of the current received signal and the reference signal power is obtained, a target gain value is determined further based on the first difference and the current gain value of the programmable gain amplifier. Wherein the target gain value is a gain value determined according to the signal strength of the current received signal for controlling the response of the programmable gain amplifier.
Further, if the power of the current received signal is greater than the power of the reference signal, further judging whether the first difference is greater than the maximum attenuation stepping value, and determining the calculation mode of the target gain value according to the judgment result. In the present embodiment, the maximum attenuation step value is the maximum value at which the communication device attenuates the signal at a single time.
In an embodiment, if the first difference is greater than the maximum attenuation step value, the current gain value and the maximum attenuation step value of the programmable gain amplifier are used to determine the target gain value, that is, the second difference between the current gain value and the maximum attenuation step value is output as the target gain value. In another embodiment, if the first difference is less than or equal to the maximum attenuation step value, the current gain value and the first difference of the programmable gain amplifier are used to determine the target gain value, that is, a third difference of the current gain value and the first difference is output as the target gain value. The current gain value is the gain value of the programmable gain amplifier at the moment, and the current gain value can be directly read or obtained through a processor.
Further, in another embodiment, if the power of the current received signal is less than the power of the reference signal, further determining whether the first difference is greater than or equal to the maximum attenuation step value, and outputting the sum of the current gain value and the maximum attenuation step value as the target gain value when the first difference is greater than or equal to the maximum attenuation step value; and if the first difference value is smaller than the maximum attenuation stepping value, outputting the sum of the current gain value and the first difference value as a target gain value.
In another embodiment, in order to avoid the communication device from being adjusted excessively frequently, a comparison range is set based on the reference signal power as a middle value, the obtained power of the current received signal is compared with an end value of the set comparison range, and a calculation mode of the target gain value is determined based on the comparison result. When the power of the current received signal is determined to fall out of the comparison range, calculating a target gain value according to a gain calculation mode of a section where the power of the current received signal is located, and adjusting the gain value of the programmable gain amplifier to be the target gain value; when the power of the current received signal is determined to be in the comparison range, the current gain value of the programmable gain amplifier is kept unchanged until the power of the received signal is determined to fall out of the comparison range in the subsequent monitoring process. The reference signal power is specifically defined as a value of received signal power corresponding to the minimum adjacent channel selectivity capable of providing better communication quality, the end value of the comparison range is respectively defined as a second threshold value and a third threshold value, the reference signal power is a value between the second threshold value and the third threshold value, and the third threshold value is smaller than the second threshold value.
Still further, the comparison range is a range with the reference signal power as an intermediate value. For example, when the reference signal power is set to 6dbm, the comparison range may be set to 5dbm to 7dbm, and in another embodiment, the comparison range may be set to 5.5dbm to 6.5dbm; in still another embodiment, the comparison range may be set to be 4dbm to 8dbm, specifically, the comparison range is set according to the actual application requirement, which is not limited herein.
In the embodiment corresponding to fig. 1 of the present application, by acquiring the signal strength of the current received signal of the communication device, and determining whether the signal strength is greater than the first threshold, that is, whether the current received signal is a large signal is determined. If the signal intensity obtained is larger than the first threshold, namely the currently received signal is judged to be a large signal, the target gain value is determined according to the signal intensity of the currently received signal, the target gain value is dynamically determined according to the signal intensity when the signal intensity is large, namely the adjacent channel selectivity is improved when the gain of a programmable gain amplifier in the communication device is adjusted, meanwhile, the large signal processing is considered, the problem that the rear-end digital signal samples overflow when the signal intensity becomes large, and further the communication quality is poor is solved, and the adjacent channel selectivity of the communication device is improved under the condition that the structure of the communication device is not changed is maintained. In addition, the technical scheme provided in the embodiment corresponding to fig. 1 of the application improves the adjacent channel selectivity of the communication device without increasing the investment of hardware cost, and is easy for mass production.
Referring to fig. 4, fig. 4 is a flow chart illustrating a method for improving adjacent channel selectivity according to another embodiment of the present application. In the present embodiment, taking the first parameter as an example of signal strength, a comparison range is preset by taking the reference signal power as an intermediate value, the obtained power of the current received signal is compared with the end value of the set comparison range, and the calculation mode of the target gain value is determined based on the comparison result. As described above, the end values of the comparison range are defined as the second threshold value and the third threshold value, respectively, and the second threshold value is larger than the third threshold value, that is, the right end value (larger end value) of the comparison range is the second threshold value, and the left end value (smaller end value) of the comparison range is the third threshold value.
The method provided by the application comprises the following steps:
s401: the signal strength of the currently received signal of the communication device is obtained.
S402: it is determined whether the signal strength is greater than a first threshold.
In the present embodiment, step S401 to step S402 are the same as step S110 and step S120, and specific reference may be made to the description of the corresponding parts above, which are not repeated here.
If the signal strength obtained in step S402 is greater than the first threshold, step S403 is executed, otherwise, if the signal strength obtained is less than or equal to the first threshold, the automatic gain adjustment function is adjusted to be in an off state, and the gain of the programmable gain amplifier of the communication device is adjusted to a preset gain value.
S403: based on the signal strength, the power of the current received signal is determined and a first difference between the power of the current received signal and the reference signal power is obtained.
After the signal intensity is larger than the first threshold value, the current received signal is determined to be a large signal with larger intensity, and at the moment, the overflow problem of the digital sampling needs to be overcome while the selectivity of the adjacent channels is improved. Therefore, the power of the current received signal is further determined based on the signal strength of the current received signal, and after the power of the current received signal is obtained, the first difference between the power of the current received signal and the power of the reference signal is further determined. In the present embodiment, the first difference is an absolute value of a difference between the power of the currently received signal and the power of the reference signal.
S404: it is determined whether the power of the currently received signal is greater than a second threshold.
After determining the power of the received signal, further determining whether the current received signal is greater than the second threshold, if it is determined that the power of the current received signal is greater than the second threshold, determining that the power of the current received signal exceeds the comparison range and is greater than the larger end value, executing the following step S405, otherwise executing the step of determining whether the power of the current received signal is less than the third threshold, which is described in detail in the embodiment corresponding to fig. 5 below.
In the current embodiment, the step S302 described above includes steps S405 to S407, where the target gain value is determined based on the first difference value and the current gain value of the programmable gain amplifier.
S405: it is determined whether the first difference is greater than a maximum attenuation step value.
If the power of the current received signal is larger than the second threshold value, further judging whether the first difference value is larger than the maximum attenuation stepping value. The maximum attenuation step value is a preset maximum step value of each gain adjustment, and is specifically set based on a hardware performance parameter of the communication device, which is not limited herein.
If the first difference is greater than the maximum attenuation step value, the following step S406 is executed; otherwise, if the first difference is less than or equal to the attenuation step value, the following step S407 is performed.
S406: and taking a second difference value between the current gain value and the attenuation stepping value as a target gain value.
If the first difference value is larger than the maximum attenuation stepping value, the second difference value obtained by subtracting the attenuation stepping value from the current gain value is obtained, the second difference value between the current gain value and the attenuation stepping value is used as a target gain value to be output, and then the gain of the programmable gain amplifier is adjusted to the target gain value, so that the adjacent channel selectivity of the communication device is improved on the premise that overflow of digital sampling is avoided.
S407: and taking a third difference value of the current gain value and the first difference value as a target gain value.
If the first difference value is less than or equal to the maximum attenuation stepping value, a third difference value obtained by subtracting the first difference value from the current gain value is obtained, the obtained third difference value between the current gain value and the first difference value is used as a target gain value to be output, and then the gain of the programmable gain amplifier is adjusted to the target gain value, so that the adjacent channel selectivity of the communication device is improved on the premise that overflow of digital sampling is avoided.
Referring to fig. 5, fig. 5 is a flow chart illustrating a method for improving adjacent channel selectivity according to another embodiment of the present application. In the present embodiment, taking the first parameter as an example of signal strength, a comparison range is preset by taking the reference signal power as an intermediate value, the obtained power of the current received signal is compared with the end value of the set comparison range, and the calculation mode of the target gain value is determined based on the comparison result. As described above, the end values of the comparison range are defined as the second threshold value and the third threshold value, respectively, and the second threshold value is larger than the third threshold value, that is, the right end value (larger end value) of the comparison range is the second threshold value, and the left end value (smaller end value) of the comparison range is the third threshold value. Fig. 5 specifically illustrates the steps involved when the power of the currently received signal is less than the comparison range, i.e., the power of the currently received signal is less than or equal to the second threshold.
The method provided by the application comprises the following steps:
s501: the signal strength of the currently received signal of the communication device is obtained.
S502: it is determined whether the signal strength is greater than a first threshold.
In the present embodiment, step S501 to step S502 are the same as step S110 and step S120, and specific reference may be made to the description of the corresponding parts above, which are not repeated here. After judging that the signal strength is greater than the first threshold, the following step S503 is further performed.
Further, in the current embodiment, before determining the power of the currently received signal based on the signal strength, the method provided by the present application further includes: waiting for a preset time to configure the registers. The preset time is the sum of the register time for configuring each required configuration. For example, the registers of the desired configuration include registers for detecting received signal power, registers for calibration.
S503: based on the signal strength, the power of the current received signal is determined and a first difference between the power of the current received signal and the reference signal power is obtained.
S504: it is determined whether the power of the currently received signal is greater than a second threshold.
In the present embodiment, steps S503 to S504 are the same as steps S403 to S404, and specific reference may be made to the description of the corresponding parts above, and the details are not repeated here.
In the present embodiment, if it is determined that the power of the current received signal is less than or equal to the second threshold, the target gain value is determined based on the first difference and the current gain value of the programmable gain amplifier, and at least part of steps S505 to S508 described below is performed.
In the present embodiment, the step S302 determines the target gain value based on the first difference and the current gain value of the programmable gain amplifier, and further includes steps S505 to S508.
S505: it is determined whether the power of the currently received signal is less than a third threshold.
If the power of the current received signal is less than or equal to the second threshold value, further judging whether the power of the current received signal is less than the third threshold value. As described above, if the third threshold is the smaller end value in the comparison range, step S505 may be understood as further determining whether the power of the current received signal is less than the lower end value of the comparison range, that is, determining whether the power of the current received signal is less than the smaller end value in the comparison range, when it is determined that the power of the current received signal is not greater than the upper limit value (the second threshold) of the comparison range.
S506: and judging whether the first difference value is larger than or equal to the maximum attenuation stepping value.
If the power of the current received signal is smaller than the third threshold value, determining that the power of the current received signal is smaller than the smaller end value in the comparison range. It is further determined whether a first difference between the power of the current received signal and the reference signal power is less than or equal to a maximum attenuation step value. Wherein the first difference is an absolute value of a difference between the power of the front received signal and the power of the reference signal.
S507: and taking the sum of the current gain value and the maximum attenuation stepping value as a target gain value.
If the first difference value is larger than or equal to the maximum attenuation stepping value, the sum of the current gain value and the maximum attenuation stepping value is calculated, the obtained sum is output as a target gain value, and then the gain of the programmable gain amplifier is adjusted to the target gain value, so that the adjacent channel selectivity of the communication device is improved on the premise that overflow of digital sampling is avoided.
S508: and taking the sum of the current gain value and the first difference value as a target gain value.
Otherwise, if the first difference value is smaller than the maximum attenuation stepping value, the sum of the current gain value and the first difference value is obtained, the obtained sum is output as a target gain value, and then the gain of the programmable gain amplifier is adjusted to the target gain value, so that the adjacent channel selectivity of the communication device is improved on the premise of avoiding overflow of digital samples.
In other embodiments, after determining that the signal strength of the current received signal is greater than the first threshold, determining the power of the current received signal based on the signal strength, and obtaining the first difference between the power of the current received signal and the power of the reference signal, it may be first determined whether the power of the current received signal is less than the third threshold; if it is determined that the power of the current received signal is less than the third threshold, executing at least part of the steps S506 to S508; otherwise, if it is determined that the power of the current received signal is greater than or equal to the third threshold, it is further determined whether the power of the current received signal is greater than the second threshold, and if it is determined that the power of the current received signal is greater than the second threshold, steps S405 to S407 in fig. 4 are performed, if it is determined that the power of the current received signal is within the comparison range, that is, greater than or equal to the third threshold and less than or equal to the second threshold, the gain of the programmable gain amplifier is kept unchanged, the signal strength of the received signal is continuously monitored according to the set manner, and the signal strength of the monitored received signal is compared with the first threshold.
In the embodiments corresponding to fig. 4 and fig. 5, after the signal strength of the current received signal is determined to be greater than the first threshold, the power of the received signal is obtained according to the signal strength of the current received signal, and then the target gain value is obtained by selecting different modes according to the comparison interval where the power of the received signal is located, so that a more accurate target gain value can be determined on the premise that the problem of overflow of the back end sampling is avoided and loss affecting the sensitivity of the communication device is not introduced, and the adjacent channel selectivity is improved to the greatest extent, thereby improving the communication quality of the communication device.
In an embodiment, if the first parameter is determined to be greater than the first threshold, maintaining the automatic gain adjustment function of the programmable gain amplifier in an on state; otherwise, if the first parameter is less than or equal to the first threshold, the automatic gain adjustment function is adjusted to be in a closed state, and the gain of the programmable gain amplifier of the communication device is adjusted to be a preset gain value.
Further, before adjusting the gain of the programmable gain amplifier of the communication device to the preset gain value, the method provided by the present application further includes: and obtaining a preset gain value corresponding to the first parameter, wherein different signal strengths correspond to different preset gain values.
Referring to fig. 6, fig. 6 is a flow chart illustrating a method for improving adjacent channel selectivity according to another embodiment of the present application. In the present embodiment, taking the first parameter as an example of the signal strength, the method provided in the present application includes steps S601 to S606.
In the present embodiment, the step S110 described above of acquiring the first parameter of the currently received signal of the communication device includes steps S601 to S602.
S601: and demodulating the current received signal to obtain an IQ signal.
As described above, the IQ signal is obtained by demodulating the received signal with the baseband chip. The signal received by the communication device is a radio frequency signal. Further, in step S601, the baseband IQ signal may be obtained, so that two paths of IQ signals are obtained after quadrature demodulation of the video signal by using the baseband chip, and then the digital IQ signal may be obtained by respectively performing ADC sampling processing on the two paths of IQ signals, that is, the baseband IQ signal is obtained.
S602: and calculating the signal strength of the current received signal based on the IQ signal strength.
After the IQ signal is obtained, the strength of the IQ signal is further obtained. Specifically, the IQ signal intensity can be obtained by direct reading by the processor, and then the signal intensity of the current received signal can be calculated and obtained based on the IQ signal intensity obtained by reading. Specifically, the phase of the IQ signal is read, and then the average and the evolution operations are sequentially performed on the phase of the IQ signal to obtain the signal strength of the current received signal.
S603: it is determined whether the signal strength is greater than a first threshold.
After the signal strength of the current received signal is obtained, whether the signal strength is larger than a first threshold value is further judged. The first threshold is a preset judgment value for judging whether the current received signal is a large signal or not. In the current embodiment, the first threshold may be a critical value of signal strength of the back-end ADC sample when overflow occurs, that is, when the current signal strength is greater than the first threshold, overflow may occur in the back-end ADC sample, otherwise, if the signal strength is less than or equal to the first threshold, overflow may not occur in the back-end ADC sample. If the signal strength is determined to be less than or equal to the first threshold, the following step S604 is executed, whereas if the signal strength is determined to be greater than the first threshold, the step S607 is executed.
S604: the automatic gain adjustment function is adjusted to an off state.
If the signal strength is less than or equal to the first threshold, it is determined that no overflow occurs in the back-end ADC sampling, so that the automatic gain adjustment function is correspondingly adjusted to be in the off state. Specifically, when the signal strength is less than or equal to the first threshold, the state value for controlling the automatic gain adjustment function (AGC: automatic Gain Control) is adjusted from on to off, for example, when the state value of the AGC is set to 1, the automatic gain adjustment function is indicated to be in an off state; when the state value of AGC is set to 0, it indicates that the automatic gain adjustment function is in an on state, and correspondingly, in the present embodiment, if it is determined that the signal strength is less than or equal to the first threshold, the state value of AGC is set to 1, so that the automatic gain adjustment function is turned off.
In another embodiment, if the signal strength is determined to be greater than the first threshold, the automatic gain adjustment function of the programmable gain amplifier is kept in an on state, that is, the state value of AGC is set to 0, so that the automatic gain adjustment function is kept in the on state, and further, the gain of the programmable gain amplifier is automatically adjusted according to the received signal strength.
S605: and acquiring a preset gain value corresponding to the signal strength.
After the automatic gain adjustment function is adjusted to be in the off state, a preset gain value corresponding to the current signal strength is further obtained. Wherein, different signal intensities correspond to different preset gain values.
In the current embodiment, a plurality of preset gain values are preset corresponding to different signal strengths in advance, so that after the signal strength is judged to be smaller than or equal to a first threshold value, the corresponding preset gain value is determined according to the current signal strength. In the present embodiment, a preset gain value is set for the signal strength smaller than the first threshold value only according to the adjacent channel selectivity of the communication device in advance, and the set preset gain value is stored corresponding to the corresponding signal strength.
S606: the gain of a programmable gain amplifier of the communication device is adjusted to a preset gain value.
S607: and determining a target gain value according to the signal strength, and adjusting the gain of a programmable gain amplifier of the communication device to the target gain value.
Step S606 in the present embodiment is the same as step S110 described above, so that reference may be made to the above description of step S110 and other corresponding steps that are the same as step S110, and step S607 in the present embodiment is the same as step S130 described above, so that reference may be made to the above description of corresponding parts, and thus, the description is omitted here.
Please see the following tables 1 to 4, by applying the technical scheme provided in the present application and the prior art scheme to the same type of communication device, and comparing the adjacent channel selectivity under the two schemes, it can be known that the technical scheme provided in the present application can better promote the adjacent channel selectivity, and can better improve the quality of communication. Specifically, tables 1 and 2 are adjacent channel selective data acquisition tables for applying prior art schemes and applying the technical profiles provided herein on HR1060U1 (400 MHz-470 MHz) communication devices, respectively; tables 3 and 4 are adjacent channel selective data acquisition tables for application of prior art schemes and application of the technical profiles provided herein, respectively, on HR1060VHF (136 MHz-174 MHz) communication devices.
TABLE 1 old scheme of HR1060 U1 (400 MHz-470 MHz)
TABLE 2 HR1060 U1 (400 MHz-470 MHz) hybrid control PGA scheme
TABLE 3 old scheme of HR1060 VHF (136 MHz-174 MHz)
Table 4 HR1060 VHF (136 MHz-174 MHz) hybrid control PGA scheme
It should be noted that, the test is performed between-103 dBm and-60 dBm, the existing test requirement is that the test is performed between-107 dBm and-80 dBm, and the actual test requires a three-way connector, and the insertion loss of about 4Db exists. The data on the right side of tables 1 to 4 above are ACS values obtained by the test. From tables 1 and 3 above, it can be seen that when the existing AGC scheme is used, there are a plurality of sets of ACS test data that do not satisfy > 65Db in the-103 to-80 dBm interval, so it can also be seen that when the existing AGC scheme is used, the adjacent channel selectivity requirements cannot be fully satisfied in the-103 to-80 dBm interval. In the technical schemes provided in the present application, ACS obtained by testing all meets the requirement of adjacent channel selectivity in the test interval-103 to-80 dBm, i.e., all the technical schemes provided in the present application meet the requirement of adjacent channel selectivity in the test interval-103 to-80 dBm, so that it can be known that the technical schemes provided in the present application can better improve the adjacent channel selectivity, thereby improving the communication quality of the communication device.
In the embodiment corresponding to the application, through the technical scheme of mixing and controlling the gain of the adjustable gain amplifier (PGA: programmable Gain Amplifier), the signal intensity of the received signal is calculated by specifically utilizing the baseband IQ signal, and the comparison result of the signal intensity of the received signal and the first threshold value is used as the control judgment signal. In the technical scheme provided by the application, the technical scheme of the hybrid control PGA is mainly realized on the baseband signal, and no loss is introduced to the received radio frequency signal (receiving signal), so that the sensitivity of the communication device is not affected.
Meanwhile, the technical scheme provided by the application can better promote the adjacent channel selectivity by adopting a sectional mixed control mode of the static PGA and the dynamic PGA. Wherein, the gain of the static PGA can be set to be adjustable, and the dynamic PGA can avoid the problem of overflow of the large-signal ADC samples. The static state refers to a state of the PGA, and the state is set in a range that the signal intensity of the received signal is smaller than the first threshold value, the PGA is kept to be a set value, and the PGA cannot be dynamically and automatically adjusted along with the signal intensity of the received signal when the state belongs to linear operation and does not cause the sampling of the rear-end ADC to enter a saturated condition (overflow) within the range that the signal intensity of the received signal is smaller than the first threshold value; the dynamic state refers to the PGA state, and the threshold value of the dynamic RSSI is larger, that is, when the threshold value is larger than the first threshold value, the ADC sample at the back end enters the saturation condition (overflows), and when the signal strength of the received signal is larger than the first threshold value, the PGA value is set to automatically adjust along with the RSSI, that is, the gain value is adjusted by adopting the dynamic PGA mode at this time. When the signal intensity of the received signal is larger than a first threshold value, a small PGA gain is adopted, so that the adjacent channel selectivity of the communication device is improved on the premise of ensuring that the ADC at the rear end does not enter saturation (overflow).
Referring to fig. 7, fig. 7 is a schematic structural diagram of a communication device 700 according to an embodiment of the present application. In the current embodiment, the communication apparatus 700 provided in the present application includes: a programmable gain amplifier 711 and a processor 714.
The control end of the programmable gain amplifier 711 is connected to the processor 714, and is used for performing gain processing on the received signal with a gain value being a target gain value under the control of the processor 714. The processor 714 is connected to the control end of the programmable gain amplifier 711, and is configured to perform the method described in any one of the embodiments shown in fig. 1 to 6 and corresponding embodiments to determine a target gain value, generate a control command corresponding to the target gain value, and send the control command to the programmable gain amplifier 711 to adjust the gain value of the programmable gain amplifier 711, so as to implement gain processing for the received signal with the gain value being the target gain value.
With continued reference to fig. 7, in another embodiment, the communication device 700 provided in the present application further includes: an antenna 701, a duplexer 702, a low-pass filter 703, a band-pass filter 704, a low-noise amplifier 705, a band-pass filter 706, a first mixer 707, an intermediate frequency crystal filter 708, an intermediate frequency amplifier 709, a second mixer 710, an ADC sampling chip 712, and a channel filter 713.
In the present embodiment, the output end of the receiving antenna 701 is connected to the input end of the duplexer 702, the output end of the duplexer 702 is connected to a low-pass filter 703, the output end of the low-pass filter 703 is connected to a band-pass filter 704, the output end of the band-pass filter 704 is connected to a low-noise amplifier 705, the output end of the low-noise amplifier 705 is connected to the input end of a band-pass filter 706, the output end of the band-pass filter 706 is connected to the input end of the first mixer 707, the output end of the first mixer 707 is connected to the input end of the intermediate frequency crystal filter 708, the output end of the intermediate frequency crystal filter 708 is connected to the input end of the intermediate frequency amplifier 709, the output end of the intermediate frequency amplifier 709 is connected to the input end of the second mixer 710 in the demodulation chip 716, the output end of the second mixer 710 is connected to the input end of the programmable amplifier 711, the output end of the programmable amplifier 711 is connected to the input end of the ADC sampling chip, the output end of the ADC 713 is connected to the input end of the channel filter 713, and the output end of the channel filter 713 is connected to the processor. The first mixer 707 is further connected to a phase-locked loop 715, and the processor 714 is connected to a control terminal of the programmable gain amplifier 711, where the processor 714 is further configured to control communication of the demodulation chip 717.
The antenna 701 is configured to receive a signal, output the received radio frequency signal to the low-pass filter 703 through the duplexer 702, filter the received radio frequency signal through the low-pass filter 703 and the band-pass filter 704 sequentially, transmit the signal to the low-noise amplifier 705 for amplification processing through the band-pass filter 704, transmit the signal obtained after amplification processing to the band-pass filter 706 for filtering processing again through the low-noise amplifier 705, transmit the signal obtained after filtering processing to the band-pass filter 706 for first mixing processing from the first mixer 707, further obtain an intermediate frequency signal, transmit the obtained intermediate frequency signal to the intermediate frequency crystal filter 708 for intermediate frequency filtering through the first mixer 707, amplify the intermediate frequency signal through the intermediate frequency amplifier 709, and transmit the amplified intermediate frequency signal to the demodulation chip 716 for demodulation processing. The demodulation chip 716 includes, among other things, a second mixer 710, a programmable gain amplifier 711, an ADC sampling chip 712, and a channel filter 713. The intermediate frequency signal output by the intermediate frequency amplifier 709 is subjected to mixing processing by the second mixer 709 to obtain a baseband signal, then the obtained baseband signal is sent to the programmable gain amplifier 711, so that the programmable gain amplifier 711 performs gain processing on the baseband signal with a gain value being a target gain value, then the baseband signal after the gain processing is sent to the ADC sampling chip 712 for ADC sampling, and finally filtered by the channel filter 713 and sent to the processor 714 for data acquisition, and the acquired data is output.
Referring to fig. 8, fig. 8 is a schematic structural diagram of an embodiment of a computer readable storage medium according to the present application. The computer readable storage medium 800 stores a computer program 801 that can be run by a processor, the computer program 801 being for implementing the method of improving adjacent channel selectivity as described in any of the embodiments of fig. 1-6 and their counterparts. Specifically, the computer readable storage medium 800 may be one of a memory, a personal computer, a server, a network device, a usb disk, etc., which is not limited in this regard.
The foregoing description is only of embodiments of the present application, and is not intended to limit the scope of the patent application, and all equivalent structures or equivalent processes using the descriptions and the contents of the present application or other related technical fields are included in the scope of the patent application.
Claims (12)
1. A method of increasing adjacent channel selectivity, the method comprising:
acquiring a first parameter of a current received signal of a communication device; the first parameter includes signal strength;
judging whether the first parameter is larger than a first threshold value or not, wherein the first threshold value corresponds to the first parameter setting;
If yes, determining a target gain value according to the first parameter, and adjusting the gain of a programmable gain amplifier of the communication device to the target gain value;
the determining a target gain value according to the first parameter includes:
determining the power of the currently received signal based on the signal strength;
acquiring a first difference value between the power of the current received signal and the power of a reference signal;
if the power of the current received signal is greater than a second threshold, judging whether the first difference value is greater than a maximum attenuation stepping value; if yes, taking a second difference value between the current gain value and the maximum attenuation stepping value as the target gain value; and if not, taking a third difference value between the current gain value and the first difference value as the target gain value.
2. The method according to claim 1, wherein the method further comprises:
if the power of the current received signal is smaller than a third threshold value, judging whether the first difference value is larger than or equal to the maximum attenuation stepping value; if yes, taking the sum of the current gain value and the maximum attenuation stepping value as the target gain value; and if not, taking the sum of the current gain value and the first difference value as a target gain value, wherein the third threshold value is smaller than the second threshold value, and the reference signal power is a value between the second threshold value and the third threshold value.
3. The method of claim 1, wherein prior to determining the power of the currently received signal based on the signal strength, the method further comprises:
waiting for a preset time to configure registers, wherein the preset time is the sum of the register time for configuring each required configuration.
4. The method of claim 1, wherein the obtaining the signal strength of the currently received signal comprises:
demodulating the current received signal to obtain an IQ signal;
and calculating and obtaining the signal strength of the current received signal based on the IQ signal strength.
5. The method according to claim 1, wherein the method further comprises:
if the first parameter is greater than the first threshold, maintaining the automatic gain adjustment function of the programmable gain amplifier in an on state;
and if the first parameter is smaller than or equal to the first threshold value, the automatic gain adjustment function is adjusted to be in a closed state, and the gain of the programmable gain amplifier of the communication device is adjusted to be a preset gain value.
6. The method of claim 5, wherein prior to said adjusting the gain of the programmable gain amplifier of the communication device to a preset gain value, the method further comprises:
And obtaining a preset gain value corresponding to the first parameter, wherein different signal strengths correspond to different preset gain values.
7. A method of increasing adjacent channel selectivity, the method comprising:
acquiring a first parameter of a current received signal of a communication device; the first parameter includes signal power;
judging whether the first parameter is larger than a first threshold value or not, wherein the first threshold value corresponds to the first parameter setting;
if yes, determining a target gain value according to the first parameter, and adjusting the gain of a programmable gain amplifier of the communication device to the target gain value;
the determining a target gain value according to the first parameter includes:
acquiring a first difference value between the power of a current received signal and the power of a reference signal;
if the power of the current received signal is greater than a second threshold, judging whether the first difference value is greater than a maximum attenuation stepping value; if yes, taking a second difference value between the current gain value and the maximum attenuation stepping value as the target gain value; and if not, taking a third difference value of the current gain value and the first difference value as the target gain value, wherein the power of the current received signal is the first parameter.
8. The method of claim 7, wherein the method further comprises:
if the power of the current received signal is smaller than a third threshold value, judging whether the first difference value is larger than or equal to the maximum attenuation stepping value; if yes, taking the sum of the current gain value and the maximum attenuation stepping value as the target gain value; and if not, taking the sum of the current gain value and the first difference value as a target gain value, wherein the third threshold value is smaller than the second threshold value, and the reference signal power is a value between the second threshold value and the third threshold value.
9. The method of claim 7, wherein the method further comprises:
if the first parameter is greater than the first threshold, maintaining the automatic gain adjustment function of the programmable gain amplifier in an on state;
and if the first parameter is smaller than or equal to the first threshold value, the automatic gain adjustment function is adjusted to be in a closed state, and the gain of the programmable gain amplifier of the communication device is adjusted to be a preset gain value.
10. The method of claim 9, wherein prior to said adjusting the gain of the programmable gain amplifier of the communication device to a preset gain value, the method further comprises:
And obtaining a preset gain value corresponding to the first parameter, wherein different signal strengths correspond to different preset gain values.
11. A communication device, the communication device comprising: a programmable gain amplifier and a processor;
the control end of the programmable gain amplifier is connected with the processor and is used for performing gain processing on the received signal with a gain value being a target gain value under the control of the processor;
the processor is connected to the control terminal of the programmable gain amplifier, and is configured to perform the method of any one of claims 1 to 6 or 7-10 to determine a target gain value, generate a control command corresponding to the target gain value, and send the control command to the programmable gain amplifier to adjust the gain value of the programmable gain amplifier.
12. A computer readable storage medium, characterized in that it stores a computer program executable by a processor for implementing the method of any one of claims 1 to 6 or 7-10.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20150094141A (en) * | 2014-02-10 | 2015-08-19 | 삼성전자주식회사 | Apparatus and method for power gain control with considering adjacent channel interference in wireless communication system |
| CN205105177U (en) * | 2015-10-20 | 2016-03-23 | 北京中科飞鸿科技有限公司 | Be applied to power amplifier's singlechip step control gain reduction compensating circuit |
| CN111130667A (en) * | 2019-12-26 | 2020-05-08 | 海能达通信股份有限公司 | Gain adjustment method, device, computer readable storage medium and related equipment |
| CN111478710A (en) * | 2020-04-09 | 2020-07-31 | 展讯通信（上海）有限公司 | Method and system for suppressing adjacent channel interference, receiver and communication system |
-
2021
- 2021-01-14 CN CN202110048981.7A patent/CN114765846B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20150094141A (en) * | 2014-02-10 | 2015-08-19 | 삼성전자주식회사 | Apparatus and method for power gain control with considering adjacent channel interference in wireless communication system |
| CN205105177U (en) * | 2015-10-20 | 2016-03-23 | 北京中科飞鸿科技有限公司 | Be applied to power amplifier's singlechip step control gain reduction compensating circuit |
| CN111130667A (en) * | 2019-12-26 | 2020-05-08 | 海能达通信股份有限公司 | Gain adjustment method, device, computer readable storage medium and related equipment |
| CN111478710A (en) * | 2020-04-09 | 2020-07-31 | 展讯通信（上海）有限公司 | Method and system for suppressing adjacent channel interference, receiver and communication system |
Non-Patent Citations (1)
| Title |
|---|
| 施扬喜 ; 赵利 ; 梁仪庆 ; 唐俏笑 ; .软件无线电接收机的AGC信号处理算法及控制模型的设计与实现.现代计算机.(第21期), * |
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