Specific absorption rate method, apparatus, communication device, and readable storage medium

Abstract

The application relates to a specific absorption rate adjusting method, device, computer equipment, storage medium and computer program product. The method comprises the following steps: acquiring a current bias parameter and a continuous working duration of a power amplifier respectively; determining an actual average specific absorption rate according to a preset mapping relationship, the bias parameter and the continuous working duration; if the actual average specific absorption rate is equal to a preset threshold value, controlling the power amplifier to work at a target bias parameter according to the preset mapping relationship, so that the actual average specific absorption rate is lower than the preset threshold value. By using the method, the actual average absorption rate of the communication equipment can be ensured to be lower than the safety standard preset threshold value of the region, and the power amplifier can work in a state with higher power additional efficiency, so that the transmission efficiency of the communication equipment is improved.

Description

Technical Field

[0001] This application relates to the field of radio frequency technology, and in particular to a specific absorption rate adjustment method, apparatus, communication equipment, computer-readable storage medium, and computer program product. Background Technology

[0002] Electronic devices generate electromagnetic radiation during communication, which can have a certain impact on the human body. To assess the extent of this impact, the industry has introduced the Specific Absorption Rate (SAR). SAR, also known as the electromagnetic wave absorption ratio, refers to the percentage of electromagnetic radiation absorbed by the human body. The lower the SAR, the less electromagnetic radiation is absorbed, and the less impact the electromagnetic radiation from electronic devices has on the human body.

[0003] In related technologies, in order to reduce the SAR value to meet the preset threshold of the regional safety standard, the input power of the power amplifier is usually reduced directly to reduce the radio frequency output power, thereby making the SAR value of the antenna lower than the prescribed safety standard. However, this approach will reduce the transmission efficiency of the communication equipment. Summary of the Invention

[0004] This application provides a specific absorption rate adjustment method, apparatus, communication device, computer-readable storage medium, and computer program product, which can ensure that the actual average absorption rate of the communication device is lower than the preset threshold of the regional safety standard, while also enabling the power amplifier to operate in a state with high power-added efficiency, thereby improving the transmission efficiency of the communication device.

[0005] Firstly, a method for adjusting specific absorption rate is provided, comprising:

[0006] Obtain the current bias parameters and continuous operating time of the power amplifier respectively;

[0007] The actual average specific absorption rate is determined according to the preset mapping relationship, the bias parameter, and the continuous working duration, wherein the preset mapping relationship is used to represent the correspondence between the bias parameter, output power, and average specific absorption rate of the power amplifier;

[0008] If the actual average specific absorption rate is equal to or exceeds a preset threshold, the power amplifier is controlled to operate at the target bias parameter according to the preset mapping relationship, so that the actual average specific absorption rate is lower than the preset threshold.

[0009] Secondly, a specific absorption rate adjustment device is provided, comprising:

[0010] The acquisition module is used to acquire the current bias parameters and continuous operating duration of the power amplifier, respectively.

[0011] The first determining module is used to determine the target average specific absorption rate according to the preset mapping relationship and the bias parameter, wherein the preset mapping relationship is used to represent the correspondence between the bias parameter, output power and average specific absorption rate of the power amplifier;

[0012] The second determining module is used to determine the actual average specific absorption rate based on the continuous working duration and the target average specific absorption rate.

[0013] An adjustment module is used to control the power amplifier to operate at a target bias parameter according to the preset mapping relationship when the actual average specific absorption rate exceeds a preset threshold, so that the actual average specific absorption rate is lower than the preset threshold.

[0014] Thirdly, a communication device is provided, comprising:

[0015] A power amplifier is used to amplify the power of the transmitted signal.

[0016] A storage circuit is used to store a preset mapping relationship, wherein the preset mapping relationship is used to represent the correspondence between the bias parameters, output power and average specific absorption rate of the power amplifier;

[0017] A specific absorption rate adjustment circuit, connected to the power amplifier and the storage module respectively, is used to obtain the current bias parameters and continuous operating time of the power amplifier, determine the target average specific absorption rate according to the preset mapping relationship and the bias parameters, determine the actual average specific absorption rate according to the continuous operating time and the target average specific absorption rate, and if the actual average specific absorption rate exceeds a preset threshold, then control the power amplifier to operate at the target bias parameter according to the preset mapping relationship so that the actual average specific absorption rate is lower than the preset threshold.

[0018] Fourthly, a communication device is provided, including a memory and a processor, wherein the memory stores a computer program, characterized in that, when the computer program is executed by the processor, the processor performs the steps of the specific absorption rate adjustment method as described above.

[0019] Fifthly, a computer-readable storage medium is provided, on which a computer program is stored, characterized in that, when the computer program is executed by a processor, it implements the steps of the specific absorption rate adjustment method as described above.

[0020] Sixthly, a computer program product is provided, comprising a computer program, characterized in that, when the computer program is executed by a processor, it implements the steps of the aforementioned specific absorption rate adjustment method.

[0021] The aforementioned specific absorption rate (SRR) adjustment method, apparatus, communication equipment, computer-readable storage medium, and computer program product can respectively acquire the current bias parameters and continuous operating time of the power amplifier; determine the actual average SRR based on a preset mapping relationship, the bias parameters, and the continuous operating time; if the actual average SRR is equal to or exceeds a preset threshold, control the power amplifier to operate at a target bias parameter according to the preset mapping relationship, so that the actual average SRR is lower than the preset threshold; when the actual average SRR is higher than the preset threshold, adjust the current bias parameters of the power amplifier to the target bias parameters, thereby reducing the actual average SRR to be lower than the preset threshold of the regional safety standard. Simultaneously, adjusting the current bias information does not change the input power of the power amplifier, but adjusts the gain of the power amplifier, thereby reducing the transmit power of the power amplifier, so that the power amplifier operates in a state with high power-added efficiency, improving the transmit efficiency of the communication equipment; furthermore, it can effectively reduce the heat dissipation of the power amplifier, thereby increasing the battery life of the communication equipment. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a diagram illustrating the application environment of a specific absorption rate adjustment method in one embodiment.

[0024] Figure 2 This is a schematic diagram of the output power versus efficiency curve of a power amplifier in one embodiment;

[0025] Figure 3 Here is a flowchart of a specific absorption rate adjustment method in one embodiment;

[0026] Figure 4 Here are the input / output characteristic curves of a power amplifier under different biases in one embodiment;

[0027] Figure 5 This is a distribution diagram of the average proportional absorption rate in one embodiment;

[0028] Figure 6 This is a schematic diagram illustrating the change of the output power of a power amplifier over time in one embodiment;

[0029] Figure 7 This is a flowchart illustrating the determination of the actual average specific absorption rate based on the continuous working duration and the target average specific absorption rate in one embodiment.

[0030] Figure 8 Here is a flowchart of a specific absorption rate adjustment method in another embodiment;

[0031] Figure 9 This is a graph showing the relationship between the actual average SAR and the bias parameter in one embodiment;

[0032] Figure 10 Here is a flowchart of a specific absorption rate adjustment method in another embodiment;

[0033] Figure 11 This is a structural block diagram of a specific absorption rate adjustment device in one embodiment;

[0034] Figure 12 This is a structural block diagram of a communication device in one embodiment;

[0035] Figure 13 This is a structural block diagram of a communication device in another embodiment. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0037] The specific absorption rate adjustment method provided in this application embodiment can be applied to, for example... Figure 1In the application environment shown, the communication device 10 includes a radio frequency transceiver 110, a transmitting circuit 120, a receiving circuit 130, and an antenna ANT. The transmitting circuit 120 and the receiving circuit 130 are connected to the radio frequency transceiver 110, and can be connected to the antenna. The transmitting circuit 120 may include devices such as a power amplifier 121, which receives the transmitted signal output from the radio frequency transceiver 110, amplifies the power of the transmitted signal, and transmits it to the antenna for transmitting signal processing. The receiving circuit 130 may include devices such as a low-noise amplifier 131, which receives the received signal from the antenna, processes the received signal using the low-noise amplifier 131, and transmits it to the radio frequency transceiver 110 for receiving signal processing. Optionally, the transmitting circuit 120 may also include a filtering unit, a coupling unit, etc., and the receiving circuit 130 may also include a filtering unit, etc. In this embodiment, the specific structure of the transmitting circuit 120 and the receiving circuit 130 is not further limited. Optionally, the receiving circuit 130 may be omitted from the communication device 10. The communication device 10 may be, but is not limited to, various personal computers, laptops, smartphones, tablets, IoT devices, and portable wearable devices. IoT devices may include smart speakers, smart in-vehicle devices, etc. Portable wearable devices may include smartwatches, smart bracelets, head-mounted devices, etc.

[0038] In related technologies, specific absorption rate (SRR) adjustment methods are based on adjusting the SRR using a fixed backoff transmit power. For example, if the maximum transmit power of a communication device is 23 dBm, when the SRR backoff mechanism is activated or triggered, the transmit power of the communication device is reduced by a fixed backoff value, such as 3 dB, and the transmit power is maintained at 20 dBm after the backoff. When using a fixed backoff value, the output power of the power amplifier is reduced by decreasing the input power of the power amplifier; the gain of the power amplifier remains unchanged. This leads to a significant decrease in the power-added efficiency (PAE) of the power amplifier. Figure 2 As shown in the figure, taking curve 1 as an example, when the output power is 28dBm, the power-added efficiency of the power amplifier is about 45%, but when it drops back 4dB to 24dBm, the power-added efficiency decreases to 30%.

[0039] In one embodiment, such as Figure 3 As shown, a specific absorption rate adjustment method is provided, which can be applied to... Figure 1 Taking a communication device as an example, the explanation includes the following steps:

[0040] Step 302: Obtain the current bias parameters and continuous operating time of the power amplifier.

[0041] In communication equipment, the operating state of the power amplifier in the transmitting circuit is typically determined by the power amplifier's bias parameters. These operating states include, but are not limited to, the power amplifier's gain, maximum output power, and efficiency. The bias parameters may include bias voltage, bias current (or quiescent current), etc. For ease of explanation, this embodiment uses bias voltage as an example.

[0042] Figure 4 These are the input / output characteristic curves of the power amplifier under different biases. Figure 4 It can be seen that, for the same output power, under different bias parameters, the greater the difference between the output power of the power amplifier and the maximum output power of the power amplifier, the lower the power added efficiency (PAE) of the power amplifier; conversely, the smaller the difference, the higher the power added efficiency of the power amplifier.

[0043] In this embodiment, when the transmitting circuit is in operation, the specific absorption rate adjustment circuit in the communication device can detect the current bias parameters of the power amplifier in the transmitting circuit. Simultaneously, the communication device can obtain the continuous operating time of the power amplifier based on a time monitoring strategy. The continuous operating time can be understood as the duration for which the power amplifier continuously amplifies the transmitted signal output by the RF transceiver within a preset time.

[0044] Step 304: Determine the actual average specific absorption rate based on the preset mapping relationship, the bias parameter, and the continuous working duration.

[0045] A preset mapping relationship is used to represent the correspondence between the bias parameters, output power, and average specific absorption rate of the power amplifier. The output power in the preset mapping relationship is the output power of the power amplifier operating under the corresponding bias parameters. This preset mapping relationship can be stored in the storage circuit of the communication device (e.g., the processor of the communication device), or directly in the radio frequency transceiver, or in an external storage module, such as read-only memory (ROM), flash memory (Flash EEPROM), random access memory (RAM), etc.

[0046] Specific Absorption Rate (SAR) is an internationally recognized indicator for assessing the effects of radio waves on the human body. It is a safety standard subject to strict regulation by regulatory agencies worldwide. The SAR value is strongly correlated with parameters such as the transmitted signal power, antenna efficiency, and antenna radiation pattern. For example, the SAR value is directly proportional to the conducted power; the higher the conducted power, the higher the SAR value.

[0047] In this embodiment, the average specific absorption rate can be understood as the time-averaged specific absorption rate (Time Average SAR), or simply time-averaged SAR. The time-averaged SAR is the time-domain moving average of the specific absorption rate over a preset sampling duration (or sampling time window, sampling time period). The preset sampling duration can be a custom time length or a fixed value set according to the requirements of specific absorption rate regulatory agencies in different countries or regions. For example, the FCC's preset sampling duration is 100 seconds. The communication device can calculate the time-averaged specific absorption rate based on the instantaneous SAR values ​​within the preset sampling duration.

[0048] In this embodiment, the continuous operating time of the power amplifier is less than or equal to a preset sampling time, where the preset sampling time is the sampling time for the average specific absorption rate. The communication device can determine the average specific absorption rate corresponding to the current bias parameter of the power amplifier from a preset mapping relationship, and then determine the actual average specific absorption rate based on the continuous operating time of the power amplifier and the preset sampling time. This avoids obtaining the actual average efficiency based on the current output power of the power amplifier, resulting in higher efficiency.

[0049] Step 306: If the actual average specific absorption rate is equal to or exceeds a preset threshold, then control the power amplifier to operate at the target bias parameter according to the preset mapping relationship so that the actual average specific absorption rate is lower than the preset threshold.

[0050] The preset threshold is set according to the frequency band of the transmitted signal and the requirements of the specific absorption rate (SRR) regulatory structure in different countries or regions. For example, the preset threshold could be 1.6 W / kg as stipulated by the US Federal Communications Commission (FCC), or 2.0 W / kg as stipulated by the European Union. For clarity, using the US FCC as an example, for transmitted signals below 3 GHz, the average SRR over any 100-second preset sampling period must not exceed the upper limit of 1.6 W / kg. However, the instantaneous SRR value can exceed 1.6 W / kg, as long as the average SRR value within the regulatory-required preset sampling period (or sampling time window, e.g., 100 seconds as stipulated by the FCC) is controlled not to exceed the preset threshold. Figure 5 As shown, the dashed circle in the upper left corner of the communication equipment can be interpreted as a distribution map of average SAR values ​​(ellipses represent hotspot values ​​with the same average SAR value; the further out the ellipse, the lower the average SAR hotspot value). Generally, the higher the radio frequency power of the transmitted signal, the higher the average SAR hotspot value (the center of the dashed ellipse), and the lower the radio frequency power of the transmitted signal, the lower the average SAR hotspot value. The preset thresholds of regulatory agencies in various countries or regions can be understood as the hotspot value at the highest point of SAR; that is, the actual average specific absorption rate must not exceed the preset threshold required by regulations.

[0051] If the power amplifier operates at the current bias parameter and its actual average specific absorption rate is equal to or exceeds a preset threshold, then according to a preset mapping relationship, the power amplifier is controlled to operate at a target bias parameter so that the actual average specific absorption rate is lower than the preset threshold, thereby meeting the regulatory requirements of various regions. The average specific absorption rate corresponding to the target bias parameter is lower than the actual average specific absorption rate corresponding to the current bias parameter. The output power of the power amplifier operating at the target quiescent operating point is lower than the output power of the power amplifier operating at the current quiescent operating point.

[0052] Optionally, if the power amplifier operates at the current bias parameters and its actual average specific absorption rate is less than a preset threshold, the power amplifier can be controlled to continue operating at the current bias parameters to maintain the current gain and achieve power amplification of the transmitted signal, thereby maintaining the current output power, without the need to forcibly adjust the current bias parameters of the power amplifier.

[0053] The specific absorption rate adjustment method in this application includes: acquiring the current bias parameters and continuous operating duration of a power amplifier; determining the actual average specific absorption rate based on a preset mapping relationship, the bias parameters, and the continuous operating duration; if the actual average specific absorption rate is equal to or exceeds a preset threshold, controlling the power amplifier to operate at a target bias parameter according to the preset mapping relationship, so that the actual average specific absorption rate is lower than the preset threshold. This allows adjustment of the power amplifier's bias parameters based on the average specific absorption rate, thus enabling communication devices to operate at a power limit P for certain time periods. limit The output power is used to emit electromagnetic wave signals, and for certain time periods, the output power is lower than the power limit. The power limit can be understood as the power level corresponding to the upper limit of the instantaneous specific absorption rate. If the output power exceeds the power limit, the corresponding instantaneous specific absorption rate will exceed the preset threshold, such as... Figure 6 As shown, when the actual average specific absorption rate (SPR) is higher than a preset threshold, the current bias parameter of the power amplifier is adjusted to reduce the actual SPR below the preset threshold of the regional safety standard. Simultaneously, adjusting the current bias information does not change the input power of the power amplifier; instead, it adjusts the gain of the power amplifier, thereby reducing the transmit power of the power amplifier. This allows the power amplifier to operate in a state with high power-added efficiency, improving the transmit efficiency of the communication equipment. Furthermore, it effectively reduces the heat dissipation of the power amplifier, thus extending the battery life of the communication equipment.

[0054] In one embodiment, controlling the power amplifier to operate at a target bias parameter according to the preset mapping relationship so that the actual average specific absorption rate is lower than the preset threshold includes: determining the target bias parameter according to the actual average specific absorption rate and the preset mapping relationship; controlling the power amplifier to operate at the target bias parameter to reduce the output power of the power amplifier.

[0055] The specific absorption rate (SAR) adjustment circuit of the communication device can determine a target bias parameter from a preset mapping relationship based on the acquired actual average SAR. The average SAR corresponding to the target bias parameter is lower than the actual average SAR corresponding to the current bias parameter. The difference between the average SAR corresponding to the target bias parameter and the actual average SAR corresponding to the current bias parameter can be maintained within a certain range. When the target bias parameter is determined, the communication device can adjust the current bias parameter to the target bias parameter, reducing the output power of the power amplifier to make the actual average SAR lower than the preset threshold.

[0056] In one embodiment, the communication device can determine the magnitude of the difference based on the current communication scenario (e.g., obstruction state). For example, if the communication device is currently obstructed and in a weak communication scenario, the difference between the average specific absorption rate corresponding to the target bias parameter and the actual average specific absorption rate corresponding to the current bias parameter can be made smaller. This ensures that when the power amplifier operates at the target bias parameter, it can satisfy the requirement that the average specific absorption rate is below a preset threshold while still allowing for a higher output power, thereby improving communication performance in weak communication scenarios. Conversely, if the communication device is currently not obstructed and in a strong communication scenario, the difference between the average specific absorption rate corresponding to the target bias parameter and the actual average specific absorption rate corresponding to the current bias parameter can be made larger. This ensures that when the power amplifier operates at the target bias parameter, it can satisfy the requirement that the average specific absorption rate is below a preset threshold while further reducing the output power of the power amplifier, thereby reducing the power consumption of the communication device.

[0057] In one embodiment, such as Figure 7 As shown, determining the actual average specific absorption rate based on the continuous working duration and the target average specific absorption rate includes:

[0058] Step 702: Determine the target average specific absorption rate based on the current bias parameter and the preset mapping relationship.

[0059] In a communication device, the specific absorption adjustment circuit determines the target average specific absorption rate corresponding to the current bias parameter based on the detected current bias parameter of the power amplifier within a preset mapping relationship.

[0060] Step 704: Obtain the time percentage based on the continuous working duration and the preset sampling duration.

[0061] In communication equipment, the specific absorption adjustment circuit can obtain the continuous operating time of the power amplifier and determine the time percentage based on this continuous operating time and a preset sampling time. The time percentage can be understood as the ratio of the continuous operating time to the preset sampling time. The continuous operating time and the time percentage are positively correlated; that is, the longer the continuous operating time, the larger the corresponding time percentage.

[0062] Step 706: Determine the actual average specific absorption rate based on the time percentage and the target average specific absorption rate.

[0063] The actual average specific absorption rate (APR) is positively correlated with the target APR and also with the time percentage. For example, the actual APR can be understood as the product of the time percentage and the target APR. In other words, the higher the target APR corresponding to the current bias parameter, the higher the actual APR, and the greater the risk of reaching the preset threshold.

[0064] In this embodiment, the actual average specific absorption rate can be directly determined by using a pre-configured mapping relationship and the power amplifier's operating parameters, such as continuous operating time and current bias parameters. This avoids monitoring the power amplifier's output power through a coupler and calculating the actual average specific absorption rate based on the continuous operating time. This improves the efficiency and accuracy of obtaining the actual average specific absorption rate, and allows for more efficient determination of whether the actual average specific absorption rate has reached a preset threshold. Furthermore, when the actual average specific absorption rate has reached the preset threshold, timely feedback can be provided to adjust the power amplifier's current bias to the target bias parameter, ensuring that the actual average specific absorption rate remains stable within the preset threshold range required by regulations.

[0065] like Figure 8 As shown, in one embodiment, the specific absorption rate adjustment method includes steps 802-816.

[0066] Step 802: Obtain the current bias parameters and continuous operating time of the power amplifier.

[0067] Step 804: Set the output power of the power amplifier according to the preset step.

[0068] In setting the output power of a power amplifier, the operating frequency band of the electromagnetic wave signal processed by the power amplifier can be used. The operating frequency band can include low frequency, mid frequency, and high frequency. Different operating frequency bands correspond to different power ranges for the output power of the power amplifier. The output power of the power amplifier can be set according to a preset step. For example, the preset step can be 1 dBm, and the range of the output power of the power amplifier can be from 10 dBm to 26 dBm. The smaller the preset step value, the more accurate the corresponding bias parameter. The minimum step value needs to satisfy the inherent properties of the power amplifier. In this embodiment, the size of the preset step value and the power range of the power amplifier's output power are not further limited.

[0069] Step 806: Control the input power of the power amplifier to remain constant, adjust the bias parameters of the power amplifier so that the output power of the power amplifier reaches the set output power, and record the correspondence between the bias parameters and the output power.

[0070] During the process of establishing a preset mapping relationship, communication equipment needs to maintain a constant input power of the power amplifier. The input power of the power amplifier is related to the operating frequency band of the electromagnetic signal it processes, and this input power is determined by the radio frequency transceiver.

[0071] The specific absorption rate adjustment circuit of the communication equipment can adjust the bias parameter of the power amplifier while keeping the input power of the power amplifier constant, so that the output power of the power amplifier operating under the corresponding bias parameter is the same as the previously set output power. For example, if the set output power is P_1, the bias parameter of the power amplifier is adjusted to make the output power of the power amplifier the same as the output power P_1, and this bias parameter is recorded as Bias_1. For each set output power, a corresponding bias parameter can be determined, and the correspondence between the bias parameter and the output power can be recorded. In the process of establishing the correspondence between the bias parameter and the output power, it is necessary to control the power amplifier to operate continuously under each bias parameter, where the duration of continuous operation is a preset sampling duration.

[0072] Step 808: Determine the corresponding average specific absorption rate for each output power.

[0073] For each output power, a corresponding specific absorptivity can be obtained, and based on the specific absorptivity and a preset sampling time, the average specific absorptivity can be obtained. The average specific absorptivity is the time-domain moving average of the specific absorptivity over a preset sampling duration (or sampling time window, sampling time period). In this embodiment, the average specific absorptivity can be obtained based on traditional calculation methods. It should be noted that in this embodiment, the average specific absorptivity can be expressed as the time-averaged specific absorptivity, or simply time-averaged SAR.

[0074] Step 810: Determine the preset mapping relationship for the average specific absorption rate and corresponding relationship of each output power.

[0075] For each output power, its corresponding bias parameter and average specific absorption rate are determined and recorded, including but not limited to tables. In this way, a correspondence between output power, bias parameter, and average specific absorption rate can be established for all set output power levels, thus determining the preset mapping relationship, as shown in Table 1 and... Figure 9 As shown.

[0076] Table 1 shows the relationship between output power, bias parameters, and average specific absorption rate.

[0077] Output power bias parameters Gain Average specific absorption rate 10dBm Bias_1 P_1 SAR_1 11dBm Bias_2 P_2 SAR_2 12dBm Bias_3 P_3 SAR_3 13dBm Bias_4 P_4 SAR_4 … … … … 26dBm Bias_N P_N SAR_N

[0078] Steps 804-810 describe the implementation method for establishing a preset mapping relationship in the communication device. Based on steps 804-810, the correspondence between the bias parameters of the power amplifier, the output power of the power amplifier, and the average specific absorption rate can be established.

[0079] Optionally, the gain of the power amplifier can be increased during the process of constructing the preset mapping relationship, as shown in Table 1. Here, given a fixed input power, the gain of the power amplifier is positively correlated with its output power. That is, the higher the gain, the higher the corresponding output power.

[0080] It should be noted that steps 804-810 can be executed before step 802, that is, after the preset mapping relationship is established, step 802 can be executed; or steps 804-810 can be executed after step 802. In this embodiment, the execution order of step 802 and the step of establishing the preset mapping relationship is not further limited.

[0081] Step 812: Determine the target average specific absorption rate according to the preset mapping relationship and the bias parameter.

[0082] Step 814: Determine the actual average specific absorption rate based on the continuous working duration and the target average specific absorption rate.

[0083] Step 816: If the actual average specific absorption rate exceeds a preset threshold, then control the power amplifier to operate at the target bias parameter according to the preset mapping relationship so that the actual average specific absorption rate is lower than the preset threshold.

[0084] In this embodiment, the communication device sets the output power of the power amplifier according to a preset step. The smaller the preset step value, the more accurate the corresponding bias parameter. When feedback adjustment of the current bias of the power amplifier is required, the target bias parameter can be located more accurately. This ensures that the actual average specific absorption rate can be kept stable within the preset threshold range required by regulations, while also enabling the power amplifier to operate in a state with high power-added efficiency, thereby improving the transmission efficiency of the communication device. In addition, it can effectively reduce the heat dissipation of the power amplifier and improve the battery life of the communication device.

[0085] like Figure 10 As shown, in one embodiment, the specific absorption rate adjustment method includes steps 1002-1008.

[0086] Step 1002: Obtain the current bias parameters and continuous operating time of the power amplifier;

[0087] Step 1004: Determine the actual average specific absorption rate according to the preset mapping relationship, the bias parameter, and the continuous working duration, wherein the preset mapping relationship is used to represent the correspondence between the bias parameter, output power, and average specific absorption rate of the power amplifier;

[0088] Step 1006: If the actual average specific absorption rate exceeds a preset threshold, then control the power amplifier to operate at the target bias parameter according to the preset mapping relationship so that the actual average specific absorption rate is lower than the preset threshold.

[0089] Steps 1002-1006 correspond one-to-one with the aforementioned steps 302-306, and will not be repeated here.

[0090] Step 1008: If the power amplifier is operating at the target bias parameter, then reduce the supply voltage of the power amplifier while keeping the output power of the power amplifier unchanged.

[0091] The supply voltage can be adjusted according to the actual needs of the power amplifier. When the power amplifier is loaded with the target bias parameter, that is, when it operates at the target bias parameter, its output power can be understood as the target output power. In communication equipment, the specific absorption rate adjustment circuit can control the reduction of the supply voltage, and even when the supply voltage is reduced, it can still maintain the power amplifier's output power at the target output power.

[0092] The voltage drop of the supply voltage is determined based on at least one of the power amplifier's operating current, error vector amplitude, and adjacent channel leakage ratio. For ease of explanation, the voltage drop can be determined based on the power amplifier's operating current as an example. Simultaneously, the power amplifier's operating current can be increased while decreasing the supply voltage; the product of the voltage drop and the increased current is the target output power.

[0093] Under the same output power conditions, the lower the supply voltage of the power amplifier, the higher its efficiency. For an example, please refer to [link / reference needed]. Figure 2 Different curves represent different supply voltages of the power amplifier (the supply voltage of curve 2 on the far left of the figure is lower than that of curve 1 on the far right). Under the same output power conditions, the lower the supply voltage of the power amplifier, the higher the efficiency of the power amplifier. In the embodiments of this application, when the power amplifier is controlled to operate at the target bias parameter, the supply voltage output to the power amplifier can be reduced simultaneously, which can further improve the efficiency of the power amplifier and reduce the power consumption of the power amplifier.

[0094] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0095] Based on the same inventive concept, this application also provides a specific absorption rate (SAR) regulating device for implementing the aforementioned specific absorption rate (SAR) regulating method. The solution provided by this device is similar to the implementation described in the above method; therefore, specific limitations in one embodiment of the SAR regulating device provided below can be found in the limitations of the specific absorption rate (SAR) regulating method described above, and will not be repeated here.

[0096] In one embodiment, such as Figure 11 As shown, a specific absorption rate adjustment device is provided, comprising: an acquisition module 1110, a determination module 1120, and an adjustment module 1130, wherein:

[0097] The acquisition module 1110 is used to acquire the current bias parameters and continuous operating time of the power amplifier, respectively.

[0098] The determining module 1120 is used to determine the actual average specific absorption rate according to the preset mapping relationship, the bias parameter, and the continuous working duration, wherein the preset mapping relationship is used to represent the correspondence between the bias parameter, output power, and average specific absorption rate of the power amplifier;

[0099] The adjustment module 1130 is used to control the power amplifier to operate at a target bias parameter according to the preset mapping relationship when the actual average specific absorption rate exceeds a preset threshold, so that the actual average specific absorption rate is lower than the preset threshold.

[0100] The aforementioned specific absorption rate adjustment device adjusts the current bias parameters of the power amplifier when the actual average specific absorption rate is higher than a preset threshold, thereby reducing the actual average specific absorption rate to below the preset threshold of the regional safety standard. At the same time, by adjusting the current bias information, the input power of the power amplifier is not changed, but the gain of the power amplifier is adjusted, thereby reducing the transmission power of the power amplifier so that the power amplifier operates in a state with high power-added efficiency, improving the transmission efficiency of the communication equipment. In addition, it can also effectively reduce the heat dissipation of the power amplifier, thereby increasing the battery life of the communication equipment.

[0101] In one embodiment, the determining module 1120 is further configured to determine the target average specific absorption rate based on the current bias parameter and the preset mapping relationship, obtain the time proportion based on the continuous working duration and the preset sampling duration, and determine the actual average specific absorption rate based on the time proportion and the average specific absorption rate.

[0102] In one embodiment, the adjustment module 1130 is further configured to determine the target bias parameter based on the actual average specific absorption rate and the preset mapping relationship; control the power amplifier to operate under the target bias parameter, and reduce the output power of the power amplifier, wherein the average specific absorption rate corresponding to the target bias parameter is lower than the actual average specific absorption rate corresponding to the current bias parameter.

[0103] In one embodiment, the specific absorption rate adjustment device further includes:

[0104] The mapping relationship construction module is used to set the output power of the power amplifier according to a preset step, control the input power of the power amplifier to remain constant, adjust the bias parameters of the power amplifier so that the output power of the power amplifier reaches the set output power, and record the correspondence between the bias parameters and the output power; wherein, the duration for which the power amplifier operates at the bias parameters is a preset sampling duration, the average specific absorption rate is determined for each output power, and the preset mapping relationship is determined for the average specific absorption rate and the corresponding relationship for each output power.

[0105] In one embodiment, the specific absorption rate adjustment device further includes:

[0106] The voltage regulation module 1130 is used to reduce the supply voltage of the power amplifier while keeping the output power of the power amplifier constant when the power amplifier is operating under the target bias parameters, wherein the voltage drop of the supply voltage is determined based on at least one of the operating current of the power amplifier, the error vector amplitude, and the adjacent channel leakage ratio.

[0107] Each module in the aforementioned specific absorption rate adjustment device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of a computer device in hardware form or independent of it, or stored in the memory of a computer device in software form, so that the processor can call and execute the operations corresponding to each module.

[0108] like Figure 12 As shown, in one embodiment, a communication device is provided, which may further include a storage module 140 and a specific absorption rate adjustment circuit 150. The storage module 140 is used to store a preset mapping relationship, wherein the preset mapping relationship represents the correspondence between the bias parameters, output power, and average specific absorption rate of the power amplifier. The storage module 140 may also be integrated into the radio frequency transceiver 110.

[0109] The specific absorption rate adjustment circuit 150 is connected to the power amplifier 121 and the storage module 140, respectively. It is used to obtain the current bias parameters and continuous working time of the power amplifier, determine the target average specific absorption rate according to the preset mapping relationship and the bias parameters, determine the actual average specific absorption rate according to the continuous working time and the target average specific absorption rate, and if the actual average specific absorption rate exceeds the preset threshold, it controls the power amplifier to work at the target bias parameter according to the preset mapping relationship so that the actual average specific absorption rate is lower than the preset threshold.

[0110] The communication device in this embodiment can adjust the current bias parameter of the power amplifier when the actual average specific absorption rate is higher than a preset threshold, thereby reducing the actual average specific absorption rate to below the preset threshold of the regional safety standard to meet the regulatory requirements of the regulatory agency. At the same time, adjusting the current bias information does not change the input power of the power amplifier, but adjusts the gain of the power amplifier, thereby reducing the transmit power of the power amplifier so that the power amplifier operates in a state with high power-added efficiency, improving the transmit efficiency of the communication device. In addition, it can also effectively reduce the heat dissipation of the power amplifier, thereby improving the battery life of the communication device.

[0111] In one embodiment, please refer to... Figure 12The communication device further includes a power supply circuit 160 connected to the power amplifier 121, used to provide a power supply voltage to the power amplifier 121. The power supply circuit 160 may include an average power tracking (APT) chip or an envelope tracking (ET) power supply chip. The specific absorption rate adjustment circuit 150 is also connected to the power supply circuit 160, used to reduce the power amplifier's supply voltage while maintaining the power amplifier's output power when the power amplifier is operating with the target bias parameters. The voltage drop of the supply voltage is determined based on at least one of the power amplifier's operating current, error vector amplitude, and adjacent channel leakage ratio.

[0112] Under the same output power conditions, the lower the supply voltage of the power amplifier, the higher its efficiency. For an example, please refer to [link / reference needed]. Figure 2 Different curves represent different power amplifier supply voltages (the supply voltage of curve 2 on the far left of the figure is lower than that of curve 1 on the far right). Under the same output power conditions, the lower the supply voltage of the power amplifier, the higher the efficiency of the power amplifier.

[0113] In this embodiment, when the power amplifier is controlled to operate at the target bias parameter, the power supply voltage output by the power supply circuit 160 to the power amplifier can be reduced simultaneously, which can further improve the efficiency of the power amplifier and reduce its power consumption.

[0114] It should be noted that the specific absorption rate adjustment circuit 150 described above can be configured to perform all the steps of the specific absorption rate adjustment method in any of the above embodiments.

[0115] In one embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as follows: Figure 13As shown, the computer device includes a processor, memory, input / output interface, communication interface, display unit, and input device. The processor, memory, and input / output interface are connected via a system bus, and the communication interface, display unit, and input device are also connected to the system bus via the input / output interface. The processor provides computational and control capabilities. The memory includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs stored in the non-volatile storage medium. The input / output interface is used for exchanging information between the processor and external devices. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, mobile cellular networks, NFC (Near Field Communication), or other technologies. When executed by the processor, the computer program implements a specific absorption rate adjustment method.

[0116] Those skilled in the art will understand that Figure 13 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0117] This application also provides a computer-readable storage medium. One or more non-volatile computer-readable storage media containing computer-executable instructions, which, when executed by one or more processors, cause the processors to perform the steps of a specific absorption rate adjustment method.

[0118] This application also provides a computer program product containing instructions that, when run on a computer, cause the computer to execute a specific absorption rate adjustment method.

[0119] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments described above. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0120] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0121] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A specific absorption rate adjustment method, characterized by, The method comprises: obtaining a current bias parameter and a continuous working duration of a power amplifier respectively; determining a target average specific absorption rate according to the current bias parameter and a preset mapping relationship, wherein the preset mapping relationship is used to represent a corresponding relationship among bias parameters, output powers and average specific absorption rates of the power amplifier; determining an actual average specific absorption rate according to the continuous working duration, a preset sampling duration and the target average specific absorption rate of the power amplifier; if the actual average specific absorption rate is equal to or exceeds a preset threshold, controlling the power amplifier to work at a target bias parameter according to the preset mapping relationship, so that the actual average specific absorption rate is lower than the preset threshold.

2. The method of claim 1, wherein, The continuous working duration is less than or equal to a preset sampling duration, and the preset sampling duration is a sampling duration of the average specific absorption rate.

3. The method of claim 2, wherein, The determining of the actual average specific absorption rate according to the continuous working duration, the preset sampling duration and the target average specific absorption rate of the power amplifier comprises: obtaining a time proportion according to the continuous working duration and the preset sampling duration; determining the actual average specific absorption rate according to the time proportion and the target average specific absorption rate.

4. The method of claim 2, wherein, The controlling of the power amplifier to work at the target bias parameter according to the preset mapping relationship, so that the actual average specific absorption rate is lower than the preset threshold, comprises: determining the target bias parameter according to the actual average specific absorption rate and the preset mapping relationship; controlling the power amplifier to work at the target bias parameter and reducing the output power of the power amplifier, wherein the average specific absorption rate corresponding to the target bias parameter is lower than the actual average specific absorption rate corresponding to the current bias parameter.

5. The method of claim 2, wherein, The method further comprises: setting the output power of the power amplifier according to a preset step; controlling the input power of the power amplifier to remain unchanged, adjusting the bias parameter of the power amplifier, so that the output power of the power amplifier reaches each set output power, and recording the corresponding relationship between the bias parameter and the output power, wherein the duration of the power amplifier working at the bias parameter is a preset sampling duration; determining the average specific absorption rate corresponding to each output power; determining the preset mapping relationship according to the average specific absorption rate of each output power and the corresponding relationship.

6. The method according to any one of claims 1 to 5, characterized in that, The method further comprises: if the power amplifier works at the target bias parameter, reducing the supply voltage of the power amplifier and keeping the output power of the power amplifier unchanged, wherein the voltage drop value of the supply voltage is determined according to at least one of the working current, the error vector magnitude and the adjacent channel leakage ratio of the power amplifier.

7. The method of claim 1, wherein, The bias parameter comprises one of a bias voltage and a bias current.

8. A specific absorption rate adjustment device, comprising: The method comprises: an obtaining module, configured to obtain a current bias parameter and a continuous working duration of a power amplifier respectively; a first determining module, configured to determine a target average specific absorption rate according to the current bias parameter and a preset mapping relationship, wherein the preset mapping relationship is used to represent a corresponding relationship among bias parameters, output powers and average specific absorption rates of the power amplifier; The second determining module is configured to determine an actual average specific absorption rate according to the continuous working duration of the power amplifier, a preset sampling duration, and the target average specific absorption rate. The adjusting module is configured to control the power amplifier to work at a target bias parameter according to the preset mapping relationship when the actual average specific absorption rate is equal to or exceeds a preset threshold, so as to make the actual average specific absorption rate lower than the preset threshold.

9. A communication device, characterized by The power amplifier is configured to amplify a power of a transmitting signal. The storage circuit is configured to store a preset mapping relationship, wherein the preset mapping relationship is used to represent a corresponding relationship among bias parameters, output powers, and average specific absorption rates of the power amplifier. The specific absorption rate adjusting circuit is respectively connected with the power amplifier and the storage module, and is configured to acquire a current bias parameter and a continuous working duration of the power amplifier, determine a target average specific absorption rate according to the preset mapping relationship and the bias parameter, determine an actual average specific absorption rate according to the continuous working duration, a preset sampling duration, and the target average specific absorption rate, and control the power amplifier to work at a target bias parameter according to the preset mapping relationship when the actual average specific absorption rate is equal to or exceeds a preset threshold, so as to make the actual average specific absorption rate lower than the preset threshold. The communication device further comprises:

10. The communication device of claim 9, wherein, The power supply circuit is connected with the power amplifier, and is configured to provide a power supply voltage for the power amplifier. The specific absorption rate adjusting circuit is further connected with the power supply circuit, and is configured to reduce the power supply voltage of the power amplifier when the power amplifier works at the target bias parameter, and keep the output power of the power amplifier unchanged, wherein a voltage drop value of the power supply voltage is determined according to at least one of a working current, an error vector magnitude, and a leakage ratio of adjacent channels of the power amplifier. The computer program is executed by the processor, so that the processor executes the steps of the specific absorption rate adjusting method according to any one of claims 1 to 7.

11. A communication device comprising a memory and a processor, said memory having stored therein a computer program, characterized in that, ​

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