Radio frequency system, wireless communication device and method for controlling power

Abstract

A radio frequency system, a wireless communication device, and a method of controlling power are provided. The radio frequency system comprises a first radio frequency path which is connected with a first antenna and is used for transmitting a radio frequency signal of a first frequency band, and the first radio frequency path comprises a first power amplifier; the second radio frequency path is used for transmitting a radio frequency signal of a second frequency band, the second radio frequency path comprises a second power amplifier, a first temperature can be increased when the second power amplifier is in a working state, and the first temperature is the temperature of the first power amplifier; and the control module is used for executing the following operations: reducing the input power of the second power amplifier according to the first temperature under the condition that the first power amplifier is at the rated input power so as to improve the target output power of the first antenna. According to the embodiment of the invention, the output power of the first antenna port can be improved, and the uplink coverage range of the first radio frequency path signal can be enhanced.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of wireless communication technology, and more specifically, to a radio frequency system, a wireless communication device, and a method for controlling power. Background Art

[0002] With the widespread application of communication technology, wireless communication equipment is increasingly being used. In wireless communication equipment, wireless communication is achieved through radio frequency circuits. Power amplifiers are important components in radio frequency circuits, and they can amplify the power of radio frequency signals. Taking a mobile phone as an example, when two or more power amplifiers are working at the same time, the temperature of the entire device rises rapidly, which will affect the transmission performance of the power amplifier and reduce the coverage of wireless communication. Summary of the invention

[0003] The embodiments of the present application provide a radio frequency system, a wireless communication device, and a method for controlling power. Various aspects of the embodiments of the present application are introduced below.

[0004] In a first aspect, a radio frequency system is provided, comprising: a first antenna; a first radio frequency path connected to the first antenna and used to transmit radio frequency signals of a first frequency band, the first radio frequency path comprising a first power amplifier, the first power amplifier being used to power amplify the radio frequency signals; a second radio frequency path, used to transmit radio frequency signals of a second frequency band, the second radio frequency path comprising a second power amplifier, the second power amplifier will increase a first temperature when in operation, the first temperature being the temperature of the first power amplifier; a detection module, used to detect the first temperature; a control module, connected to the detection module, used to perform the following operations: when the first power amplifier is at rated input power, reducing the input power of the second power amplifier according to the first temperature to increase the target output power of the first antenna, the target output power being associated with the gain of the first power amplifier and the insertion loss of the first radio frequency path.

[0005] In a second aspect, a wireless communication device is provided, comprising: a baseband system for generating a baseband signal; and a radio frequency system as described in the first aspect, for generating a radio frequency signal according to the baseband signal.

[0006] According to a third aspect, a method for controlling power is provided, wherein the RF system comprises: a first antenna; a first RF path connected to the first antenna and used to transmit RF signals of a first frequency band, the first RF path comprising a first power amplifier, the first power amplifier being used to perform power amplification processing on the RF signals; a second RF path for transmitting RF signals of a second frequency band, the second RF path comprising a second power amplifier, the second power amplifier will increase a first temperature when in operation, the first temperature being the temperature of the first power amplifier; a detection module for detecting the first temperature; a control module connected to the detection module; the method comprises: obtaining the first temperature; when the first power amplifier is at rated input power, reducing the input power of the second power amplifier according to the first temperature to increase the target output power of the first antenna, the target output power being associated with the gain of the first power amplifier and the insertion loss of the first RF path.

[0007] According to a fourth aspect, a non-volatile computer-readable storage medium is provided, wherein the computer storage medium stores a computer program, and when the computer program is executed, the method according to the third aspect is implemented.

[0008] According to a fifth aspect, a computer program product is provided, comprising instructions for executing the method according to the third aspect.

[0009] In the embodiment of the present application, when multiple power amplifiers are in working state, the temperature rise will cause the output power of the first antenna port of the first radio frequency path to become lower. By reducing the output power of the power amplifiers in other radio frequency paths, it is helpful to increase the output power of the first antenna port, enhance the uplink coverage of the first radio frequency path signal, and ensure the call quality of the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of a radio frequency system.

[0011] Figure 2 It is a schematic diagram of a radio frequency system provided in an embodiment of the present application.

[0012] Figure 3 yes Figure 2 Schematic diagram of one possible implementation of a radio frequency system.

[0013] Figure 4 It is a schematic diagram of component units / partial component units of a wireless communication device provided in an embodiment of the present application.

[0014] Figure 5 It is a flowchart of the method for controlling power provided in an embodiment of the present application. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0016] In recent years, with the development of communication technology, wireless communication equipment has been used more and more widely, and wireless communication equipment has been constantly updated and upgraded.

[0017] It should be noted that the wireless communication device mentioned in the embodiments of the present application may refer to any type of electronic device with wireless communication function. The wireless communication device mentioned in the embodiments of the present application may refer to a device that provides voice and / or data connectivity to a user, and can be used to connect people, objects and machines, such as a handheld device with wireless connection function, a vehicle-mounted device, etc. The wireless communication device in the embodiments of the present application may be, for example, a mobile phone, a tablet computer (Pad), a laptop computer, a PDA, a mobile Internet device (mobile internet device, MID), a wearable device, a virtual reality (virtual reality, VR) device, an augmented reality (augmented reality, AR) device, a wireless terminal in industrial control (industrial control), a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in a smart city (smart city), a wireless terminal in a smart home (smart home), etc.

[0018] Wireless communication devices generally include a baseband system and a radio frequency system. The baseband system is used to generate a baseband signal, and the radio frequency system is used to convert the baseband signal into a radio frequency signal, so as to transmit the radio frequency signal to a wireless radio frequency channel through an antenna.

[0019] The RF system may include an RF transceiver and an RF path. The RF transceiver can transmit a radio frequency (RF) signal to a power amplifier (PA) of the RF path. After the RF signal is amplified by the power amplifier, it can reach the desired transmission power and then be transmitted outward through the antenna. The power amplifier can adjust the transmission power of the RF signal according to actual needs to meet the transmission power requirements of different scenarios. The power amplifier is an important component of the RF path, and the normal operation of the power amplifier is of great significance to wireless communication equipment.

[0020] Taking mobile phones as an example, current users have higher and higher requirements for the upload and download speed of mobile phone wireless data, and the frequency bands of mobile phones are becoming more and more numerous. There are more and more scenarios where multiple transmission (TX) channels work simultaneously. When two or more PAs work at the same time, the temperature of the whole machine rises rapidly. In some special scenarios, such as deserts and remote areas, low-frequency communication signals are used. The radiation distance of low-frequency signals is long, and antennas usually need larger output power to transmit low-frequency signals. When two or more PAs work at the same time, the temperature rises, which will affect the transmission performance of the PA, and then cause the output power of the antenna port to become lower, reducing the communication distance of the mobile phone and affecting the coverage of wireless communication.

[0021] Therefore, when two or more PAs work at the same time, how to increase the output power of the antenna port and expand the coverage of wireless communication is a problem that needs to be solved.

[0022] Based on this, the embodiment of the present application proposes a radio frequency system. In the process of designing the radio frequency system, the embodiment of the present application first analyzes the reasons for limiting the wireless communication distance when multiple groups of PAs work simultaneously. The following is an example of an exemplary description using the scenario of two groups of PAs working simultaneously.

[0023] Figure 1 is a schematic diagram of a radio frequency system. Figure 1 As shown, the RF system 100 includes: a RF transceiver 110 , a first RF path 140 , a second RF path 150 , and the like.

[0024] The RF transceiver 110 has an output terminal connected to the RF path, namely, the output terminals of the digital-to-analog conversion units DAC0 and DAC1. The RF transceiver 110 can control the transmission frequency of the signal and adjust the transmission power of the signal.

[0025] The communication frequency band is roughly divided into several main frequency bands according to the frequency range, for example, divided into low frequency band, medium frequency band and high frequency band. In different regions and different mobile communication systems, low frequency band, medium frequency band and high frequency band may have different frequency band divisions. In a typical frequency band division, the low frequency band (low band, LB) covers below 1GHz, the middle frequency band (middleband, MB) covers 1GHz-6GHz, and the high frequency band (high band, HB) covers above 6GHz. The embodiment of the present application does not limit the specific frequency band division of the low frequency band, the middle frequency band and the high frequency band.

[0026] The first RF path 140 is connected to an output end of the RF transceiver 110 and may include a power amplifier 141, a filter 142, a switch 143, an antenna 144 and a thermistor 145. The first RF path 140 is used to transmit and receive RF signals in a low frequency band (LB).

[0027] The power amplifier 141 has an input end and an output end, and the input end is connected to the output end of the RF transceiver 110, and is used to receive the output power of the RF transceiver 110. The power amplifier 141 is used to adjust the power of the amplified RF signal. The power amplifier 141 has a gain characteristic, and the transmission power of the RF signal can be adjusted according to actual needs to meet different requirements for transmission power in different scenarios.

[0028] The filter 142 is used to filter out interference signals on the radio frequency path. The filter 142 may be a duplexer, for example.

[0029] Antenna 144 is used for transmitting and receiving radio frequency signals.

[0030] The thermistor 145 is used to detect the temperature of the power amplifier 141 .

[0031] The second RF path 150 is connected to the other output end of the RF transceiver 110, and the second RF path 150 may include a power amplifier 151, a filter 152, a switch 153, an antenna 154, and a thermistor 155. The second RF path 150 is used to transmit and receive RF signals in the middle frequency band (MB). The thermistor 155 is used to detect the temperature of the power amplifier 151.

[0032] The radio frequency system 100 may further include a power management integrated circuit 130. The power management integrated circuit (PMIC) may manage the input voltage of the power amplifier 141 and the power amplifier 151. The power management integrated circuit 130 may include temperature detection modules ADC0 and ADC1. The temperature detection module ADC0 is connected to the thermistor 145, and ADC1 is connected to the thermistor 155. The power management integrated circuit 130 may be connected to the processor 120.

[0033] When each power amplifier works alone or together, the output power of the corresponding antenna port is different.

[0034] like Figure 1 As shown, when a single-channel PA is working, that is, when the power amplifier 141 is working, the power amplifier 151 is not in working state. Assuming that the maximum output power (that is, the rated input power of the power amplifier 141) set by the digital-to-analog conversion unit DAC0 of the RF transceiver 110 is DA0m, the RF signal is amplified by the power amplifier 141, passes through the filter 142 and the switch 143 in sequence, and finally sent by the antenna 144. The thermistor 145 has the characteristic that the resistance value changes with the temperature. The collected analog signal is converted into an electrical signal and detected by the temperature detection module ADC0 of the power management integrated circuit 130. At this time, under single PA transmission, the temperature of the power amplifier 141 is T00, the gain of the power amplifier 141 corresponding to the temperature T00 is G00, and the insertion loss of the filter 142 is L00. The insertion loss of the routing in the first RF path 140 and the switch 143 is a fixed value A. Then the input power of the antenna 144 port is P0=DA0m+G00-L00-A. The output power of the antenna is positively correlated with the input power of the antenna port and is related to the radiation efficiency of the antenna. In the embodiments of the present application, the output power and input power of the antenna are not distinguished, and generally refer to the transmission power.

[0035] When the dual PA transmits at maximum power, for example, in scenarios such as 4G and 5G dual connectivity (E-UTRAN new radio dual connectivity, ENDC), uplink carrier aggregation (CA), etc., the power amplifier 141 and the power amplifier 151 are both in operation. Assume that the maximum output power DA1m set by the digital-to-analog conversion unit DAC1 of the RF transceiver 110 is amplified by the power amplifier 151, passed through the filter 152 and the switch 153, and finally the RF signal is sent by the antenna 154. Since the power amplifier 151 in the intermediate frequency band operates at high power, the temperature of the power amplifier 151 will increase, thereby causing the temperature of the entire machine to increase. At this time, the temperature of the power amplifier 141 will rise, and the temperature detection module ADC0 can be used to collect and detect that when the dual PAs are working simultaneously, the temperature of the power amplifier 141 is TM (the temperature increase is related to the distance between the two PAs). Among them, the maximum output power DA0m of DAC0 remains unchanged, the gain of the power amplifier 141 corresponding to the temperature TM is G0m, and the insertion loss of the filter 142 is Lm. The insertion loss of the wiring and the switch 143 is a fixed value A, and the input power of the antenna 144 port is PM=DA0m+G0m-L0m-A.

[0036] Among them, the characteristic of the power amplifier is that the higher the temperature, the lower the gain. The G00 value will be greater than G0m. By looking up the mapping table of the power amplifier gain changing with temperature, we can get the gain difference caused by temperature change: ΔG = G00-G0m. The characteristic of the filter is that the higher the temperature, the greater the insertion loss, that is, the L0m value is greater than L00. By looking up the table of the filter insertion loss changing with temperature, we can get the insertion loss difference caused by temperature change: ΔL = L0m-L00. It can be seen that ΔG and ΔL are both greater than 0.

[0037] Therefore, compared with the single PA transmission, the temperature becomes higher when the dual PA transmits, causing the input power of the antenna 144 port to become lower. The power difference is ΔP = P0-PM = (DA0m+G00-L00-A)-(DA0m+G0m-L0m-A) = G00-G0m+L0m-L00 = ΔG+ΔL.

[0038] It can be seen that P0 is greater than PM. The higher the temperature of the power amplifier 141 is, the lower the input power of the port of the antenna 144 is, and the lower the output power of the antenna 144 is.

[0039] Figure 2 Schematic diagram of the radio frequency system provided in the embodiment of the present application. Figure 2 The radio frequency system of the embodiment of the present application is described in detail. Figure 2As shown, the RF system 200 includes: a first antenna 212 , a first RF path 210 and a second RF path 220 , a detection module 230 and a control module 240 .

[0040] The first RF path 210 is connected to the first antenna 212 for transmitting RF signals in the first frequency band. The first RF path 210 includes a first power amplifier 211 for amplifying the power of the RF signal. The first antenna 212 is used to transmit and receive RF signals in the first frequency band.

[0041] The second RF path 220 is used to transmit RF signals in a second frequency band. The second RF path 220 includes a second power amplifier 221. When the second power amplifier 221 is in operation, the first temperature is increased, and the first temperature is the temperature of the first power amplifier 211. The specifications of the first power amplifier 211 and the second power amplifier 221 can be the same or different.

[0042] In some embodiments, the second RF path 220 is connected to a second antenna 222 , and the second antenna 222 is used to transmit and receive RF signals in a second frequency band.

[0043] In some implementations, the RF system 200 may include multiple RF paths. The second RF path 220 may be any RF path among the multiple RF paths that is different from the first RF path 210. The RF system 200 may include multiple power amplifiers, and the second power amplifier 221 may be any power amplifier among the multiple power amplifiers that is not the first power amplifier 211.

[0044] The detection module 230 is used to detect the first temperature. The detection module 230 may include a thermal element and a corresponding analog-to-digital conversion element.

[0045] The control module 240 is connected to the detection module 230, and is used to perform the following operations: when the first power amplifier 211 is at rated input power, the input power of the second power amplifier 221 is reduced according to the first temperature to increase the target output power of the first antenna 212. The target output power is the output power expected by the first antenna 212, and the target output power is associated with the gain of the first power amplifier 211 and the insertion loss of the first RF path 210.

[0046] As can be seen from the above analysis, there is a certain mapping relationship between the temperature of the first power amplifier 211 and the output power difference of the first antenna 212. The output power difference of the first antenna is also called the change in output power. The output power difference of the first antenna is the difference between the first power and the second power, the first power being the output power of the first antenna 212 when the first power amplifier 211 is at the rated input power and the second power amplifier 221 is not in working state; the second power is the output power of the first antenna 211 when the first power amplifier 211 is at the rated input power and the second power amplifier 221 is in working state. In some implementations, the control module 240 is used to perform the following operations: when the first power amplifier 211 is at the rated input power, according to the mapping relationship between the first temperature and the output power difference of the first antenna 212, the input power of the second power amplifier 221 is reduced to control the first power amplifier 211 to be at the target temperature, so as to increase the output power of the first antenna 212 to the target output power.

[0047] The temperature of the first power amplifier 211 and the output power difference of the first antenna 212 have a certain mapping relationship, that is, the temperature of the first power amplifier 211 and the output power of the first antenna 212 have a certain mapping relationship. In some implementations, the control module 240 is used to perform the following operations: when the first power amplifier 211 is at a rated input power, according to the mapping relationship between the first temperature and the output power of the first antenna 212, the input power of the second power amplifier 221 is reduced to control the first power amplifier 211 to be at a target temperature, so as to increase the output power of the first antenna 212 to the target output power.

[0048] In some implementations, the insertion loss of the first RF path 210 may include the insertion loss of a filter. The insertion loss of the filter is positively correlated with the temperature, and the gain of the first power amplifier 211 is negatively correlated with the temperature.

[0049] In some implementations, the first frequency band is a low frequency band, and the second frequency band is a mid-frequency band or a high frequency band.

[0050] In the embodiment of the present application, when multiple PAs are transmitting, the temperature rises, causing the output power of the antenna port of the first radio frequency path to decrease. By reducing the output power of other PAs (located in other radio frequency paths), it is helpful to increase the output power of the antenna port of the first radio frequency path, enhance the uplink coverage of the first radio frequency path signal, and ensure the call quality of the user.

[0051] The radio frequency system of the embodiment of the present application is further described below in combination with some possible implementation methods of the embodiment of the present application.

[0052] Figure 3 yes Figure 2A schematic diagram of a possible implementation of a radio frequency system. Figure 3 As shown, the RF system 300 includes: a first RF path 310 and a second RF path 320 , a detection module 330 , a control module 340 and a RF transceiver 350 .

[0053] The first RF path 310 is connected to the first antenna 314 for transmitting RF signals in the first frequency band. The first RF path 310 may include a first power amplifier 311, a filter 312, a switch 313, and a thermistor 315. The first power amplifier 311 is used to amplify the RF signal. The first antenna 314 is used to transmit and receive RF signals in the first frequency band.

[0054] The second RF path 320 is used to transmit RF signals of the second frequency band. The second RF path 320 may include a second power amplifier 321, a filter 322, a switch 323, and a thermistor 325. When the second power amplifier 321 is in operation, the first temperature is increased, and the first temperature is the temperature of the first power amplifier 311. The second RF path 320 is connected to a second antenna 324, and the second antenna 324 is used to transmit and receive RF signals of the second frequency band.

[0055] The detection module 330 is used to detect the first temperature. The detection module 330 may include an analog-to-digital conversion element corresponding to the thermistor 315. The thermistor 315 is located near the first power amplifier 311 and is used to collect the temperature signal of the first power amplifier 311.

[0056] In some embodiments, the detection module 330 may further include an analog-to-digital conversion element corresponding to the thermistor 325. The thermistor 325 is located near the second power amplifier 321 and is used to collect a temperature signal of the second power amplifier 321.

[0057] The detection module 330 may be an independent module or may be integrated into other modules. For example, the detection module 330 may be integrated into a power management integrated circuit (PMIC).

[0058] The RF transceiver 350 has a plurality of output terminals connected to the RF path, namely the output terminals of the digital-to-analog conversion units DAC0 and DAC1. The RF transceiver 350 can control the transmission frequency of the signal and adjust the transmission power of the signal.

[0059] The control module 340 is connected to the detection module 330, and is used to perform the following operations: when the first power amplifier 311 is at rated input power, the input power of the second power amplifier 321 is reduced according to the first temperature to increase the target output power of the first antenna 314. The target output power is the output power expected by the first antenna 314, and the target output power is associated with the gain of the first power amplifier 311 and the insertion loss of the first RF path 310.

[0060] The control module 340 may be an independent module or may be integrated into other modules. For example, the control module 340 may be integrated into a central processing unit (CPU), which is usually connected to a storage unit. A mapping table of the temperature of the first power amplifier 311 and the output power difference of the first antenna 314 may be stored in the storage unit.

[0061] From the above analysis, it can be known that there is a certain mapping relationship between the temperature of the first power amplifier 311 and the output power difference of the first antenna 314. The output power difference of the first antenna 314 is the difference between the first power and the second power, the first power is the output power of the first antenna 314 when the first power amplifier 311 is at the rated input power and the second power amplifier 321 is not in the working state; the second power is the output power of the first antenna 314 when the first power amplifier 311 is at the rated input power and the second power amplifier 321 is in the working state.

[0062] In some embodiments, a mapping relationship table of the output power of the RF transceiver 350 corresponding to the temperature change of the first power amplifier 311 may be recorded. The table includes: a data table of the gain of the first power amplifier 311 changing with temperature, a data table of the insertion loss of the filter 312 changing with temperature, and a data table of the output power of the first antenna 314 port changing with temperature. According to the detected temperature data of the first power amplifier 311, the input power of the second power amplifier 321 is adjusted, thereby reducing the temperature of the whole device, reducing the temperature of the first power amplifier 311, and increasing the target output power of the first antenna 314.

[0063] The following example uses two PAs transmitting at maximum power as an example. Figure 3 , which exemplarily introduces the working process of the radio frequency system of an embodiment of the present application.

[0064] In step 1, the electrical characteristics of the components of the first RF path 310 as they change with temperature are recorded. That is, the gain characteristics of the first power amplifier 311 as they change with temperature, and the insertion loss characteristics of the filter 312 as they change with temperature are recorded. Taking the first power amplifier 311 for low-frequency signals as an example, the first power amplifier 311 has an uplink coverage function.

[0065] Table 1 shows the gain characteristics of the first power amplifier 311. Table 2 shows the insertion loss characteristics of the filter 312. As shown in Table 1, at temperature Tn, the gain of the first power amplifier is G00, and at temperature TM, the gain of the first power amplifier is G0m. As shown in Table 2, at temperature Tn, the insertion loss of the filter 142 is L00, and at temperature TM, the insertion loss of the filter 142 is L0m.

[0066] Table 1 Gain characteristics of the first power amplifier

[0067] temperature T0 … Tn Tn+1 … TM Gain G … G00 G01 … G0m

[0068] Table 2 Insertion loss characteristics of the filter

[0069] temperature T0 … Tn Tn+1 … TM Insertion loss L … L00 L01 … L0m

[0070] In step 2, the electrical characteristics of the first power amplifier 311 when working alone are determined, that is, when the second power amplifier 321 is not in working state, the electrical characteristics of the first power amplifier 311 when transmitting with maximum input power are determined.

[0071] The current temperature of the first power amplifier 311 is collected as Tn through the thermistor 315, and it can be queried that when the temperature is Tn, the gain of the first power amplifier 311 is G00 and the insertion loss of the filter 312 is L00. The test environment can be, for example, room temperature. It should be understood that under different test environments, the current temperature value (Tn) of the first power amplifier 311 at the maximum input power may be different, but the test environment for single PA transmission and multi-PA transmission should be the same. The embodiment of the present application does not specifically limit the test environment.

[0072] In step three, when both PAs are in operation, the electrical characteristics of the first power amplifier 311 when transmitting at the maximum input power are determined.

[0073] When both PAs transmit at maximum power, it can be found that the current temperature of the first power amplifier 311 is TM, the gain of the first power amplifier 311 is G0m, and the insertion loss of the filter 312 is L0m.

[0074] In step 4, according to the power difference formula ΔP=ΔG+ΔL described above, the output power (or input power) of the first antenna 314 port can be calculated, and the power change ΔP at temperature Tn under single PA operation as the temperature increases (Tn+1 to TM) under dual PA operation can be calculated, as shown in Table 3.

[0075] Table 3 Mapping relationship between the change in the first antenna input power and temperature

[0076]

[0077] In step 5, when the first power amplifier 311 transmits at the maximum power, the second power amplifier 321 is kept in the working state. The power input to the second power amplifier 321 by the RF transceiver 350 is controlled to increase from a small value to a maximum value (such as P 20 To P 2m ) is increased successively, and the current temperature of the first power amplifier 311 is collected through the thermistor 315, and this temperature data is simultaneously mapped with the power of the second power amplifier 321 to form a mapping relationship table. This temperature data can be mapped to the power change (power difference) of the first antenna 314 when the power of the second power amplifier 321 changes, and the first power amplifier 311 is transmitting at the maximum power, and the mapping relationship is shown in Table 4. The mapping relationship table can be stored in the storage area of ​​the control device 340, or a storage device connected to the control device 340.

[0078] It can be seen from Table 4 that the higher the input power of the second power amplifier 321, the higher the temperature of the first power amplifier 311, and the lower the input power of the first antenna 314 port becomes. When the input power of the second power amplifier 321 is maximum, the power change ΔP of the first antenna port is maximum. The maximum power change is:

[0079] ΔPmax=(G00-L00)-(G0m-L0m)

[0080] Table 4 Mapping relationship between the input power of the second power amplifier and the temperature and the power change of the first antenna

[0081]

[0082] It should be understood that when the first power amplifier 311 is at the maximum input power (input power), that is, when the input power is constant, the input power (or output power) of the first antenna 314 port can be determined according to the input power difference of the first antenna 314 port. That is, according to the mapping relationship between the output power difference of the first antenna 314 port and the temperature change of the first power amplifier 311, the mapping relationship between the output power of the first antenna 314 port and the temperature change of the first power amplifier 311 can be determined. It should be understood that according to the temperature of the first power amplifier 311, the output power or output power difference of the first antenna 314 port can be determined. According to the input power of the second power amplifier 321, the temperature of the first power amplifier 311 can be determined, and then the output power or output power difference of the first antenna 314 port can be determined.

[0083] In operation, when the first power amplifier 311 is at the maximum input power, if the uplink coverage of the LB needs to be improved, the input power of the first antenna 314 port needs to be increased. By detecting the current temperature of the first power amplifier 311, the current power change ΔP of the first antenna 314 is queried according to the mapping relationship between the current temperature and the change in the output power of the first antenna port and the temperature. According to the current power change ΔP, the input power value of the corresponding second power amplifier 321 is reduced, thereby reducing the temperature of the first power amplifier 311, so as to achieve the effect of increasing the target input power of the first antenna port and increasing the uplink coverage of the LB.

[0084] In the embodiment of the present application, when the dual PAs are transmitting, the temperature rises, causing the output power of the antenna port of the first RF path to decrease. According to the mapping relationship between the change in the output power of the first antenna port and the temperature, reducing the input power of other PAs helps to increase the output power of the first antenna port, enhance the uplink coverage of the first antenna signal, and ensure the call quality of the user.

[0085] The present application also provides a wireless communication device, Figure 4 Schematic diagram of a component unit or a partial component unit of a wireless communication device provided in an embodiment of the present application. Figure 4 As shown, the wireless communication device 400 may include a baseband system 410 and a radio frequency system 420 .

[0086] The baseband system 410 may be used to generate a baseband signal. The radio frequency system 420 may be used to generate a radio frequency signal according to the baseband signal generated by the baseband system 410. The radio frequency system 420 may be any radio frequency system described in the above embodiments.

[0087] Combination of the above Figures 1 to 4 , describes in detail the device embodiment of the present application. Figure 5 , the method embodiment of the present application is described in detail. It should be understood that the description of the method embodiment corresponds to the description of the device embodiment, so the parts not described in detail can refer to the previous device embodiment.

[0088] Figure 5 It is a flowchart of a method for controlling power of a radio frequency system provided in an embodiment of the present application. Figure 5The method can be applied to the RF system mentioned in any of the above embodiments. The RF system may include: a first antenna; a first RF path connected to the first antenna and used to transmit RF signals of a first frequency band, the first RF path including a first power amplifier, the first power amplifier being used to amplify the RF signals; a second RF path being used to transmit RF signals of a second frequency band, the second RF path including a second power amplifier, the second power amplifier will increase a first temperature when in operation, the first temperature being the temperature of the first power amplifier; a detection module being used to detect the first temperature; and a control module being connected to the detection module.

[0089] Figure 5 The method may include step S510 and step S520, and these steps are described in detail with examples below.

[0090] It should be pointed out that the size of the serial numbers of the steps in the embodiments of the present application does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0091] In step S510, a first temperature is acquired.

[0092] In step S520, when the first power amplifier is at rated input power, the input power of the second power amplifier is reduced according to the first temperature to increase the target output power of the first antenna, where the target output power is associated with the gain of the first power amplifier and the insertion loss of the first RF path.

[0093] Optionally, according to the first temperature, reducing the input power of the second power amplifier to increase the target output power of the first antenna includes: reducing the input power of the second power amplifier according to the mapping relationship between the first temperature and the output power difference of the first antenna; controlling the first power amplifier to be at the target temperature to increase the output power of the first antenna to the target output power. The output power difference of the first antenna is the difference between the first power and the second power, the first power is the output power of the first antenna when the first power amplifier is at the rated input power and the second power amplifier is not in the working state; the second power is the output power of the first antenna when the first power amplifier is at the rated input power and the second power amplifier is in the working state.

[0094] Optionally, the insertion loss of the first radio frequency path includes the insertion loss of the filter, the insertion loss of the filter is positively correlated with the temperature, and the gain of the first power amplifier is negatively correlated with the temperature.

[0095] Optionally, the first frequency band is a low frequency band, and the second frequency band is a medium frequency band or a high frequency band.

[0096] An embodiment of the present application also provides a non-volatile computer-readable storage medium on which a computer program is stored, and the computer program is used to execute any of the methods described above.

[0097] It should be understood that the computer-readable storage medium mentioned in the embodiments of the present application can be any available medium that can be read by a computer or a data storage device such as a server or a data center that includes one or more available media integrated. The available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a digital video disc (DVD)) or a semiconductor medium (e.g., a solid state disk (SSD)), etc.

[0098] In various embodiments of the present application, "first", "second", etc. are used to distinguish different objects rather than to describe a specific order. The size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0099] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0100] In several embodiments provided in the present application, it should be understood that when a part is said to be "connected" or "connected" to another part, it means that the part can not only be "directly connected" but also "electrically connected" with another element intervening therebetween. In addition, the term "connected" also means that the part is "physically connected" and "wirelessly connected". In addition, when a part is said to "include" a certain element, unless otherwise stated, it means that the part can include another element, rather than excluding the other element.

[0101] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0102] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0103] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A radio frequency system, characterized in that: include: First antenna; A first radio frequency path, connected to the first antenna, and used to transmit a radio frequency signal in a first frequency band, wherein the first radio frequency path comprises a first power amplifier, and the first power amplifier is used to perform power amplification processing on the radio frequency signal; A second radio frequency path, used for transmitting a radio frequency signal of a second frequency band, wherein the second radio frequency path comprises a second power amplifier, and when the second power amplifier is in operation, a first temperature is increased, and the first temperature is a temperature of the first power amplifier; A detection module, used for detecting the first temperature; The control module is connected to the detection module and is used to perform the following operations: When the first power amplifier is at rated input power, the input power of the second power amplifier is reduced according to the first temperature to increase the target output power of the first antenna, where the target output power is associated with the gain of the first power amplifier and the insertion loss of the first RF path.

2. The radio frequency system according to claim 1, characterized in that: The control module is used to perform the following operations: When the first power amplifier is at rated input power, according to a mapping relationship between the first temperature and the output power difference of the first antenna, the input power of the second power amplifier is reduced to control the first power amplifier to be at a target temperature and increase the output power of the first antenna to the target output power; The output power difference of the first antenna is the difference between the first power and the second power, the first power being the output power of the first antenna when the first power amplifier is at the rated input power and the second power amplifier is not in a working state; the second power is the output power of the first antenna when the first power amplifier is at the rated input power and the second power amplifier is in a working state.

3. The radio frequency system according to any one of claims 1 to 2, characterized in that: The insertion loss of the first radio frequency path includes the insertion loss of the filter, the insertion loss of the filter is positively correlated with the temperature, and the gain of the first power amplifier is negatively correlated with the temperature.

4. The radio frequency system according to any one of claims 1 to 2, characterized in that: The first frequency band is a low frequency band, and the second frequency band is a medium frequency band or a high frequency band.

5. A wireless communication device, characterized in that: include: A baseband system for generating a baseband signal; The radio frequency system according to any one of claims 1 to 4, configured to generate a radio frequency signal according to the baseband signal.

6. A method for controlling power of a radio frequency system, characterized in that: The radio frequency system comprises: First antenna; A first radio frequency path, connected to the first antenna, and used to transmit a radio frequency signal in a first frequency band, wherein the first radio frequency path comprises a first power amplifier, and the first power amplifier is used to perform power amplification processing on the radio frequency signal; A second radio frequency path, used for transmitting a radio frequency signal of a second frequency band, wherein the second radio frequency path comprises a second power amplifier, and when the second power amplifier is in operation, a first temperature is increased, and the first temperature is a temperature of the first power amplifier; A detection module, used for detecting the first temperature; A control module connected to the detection module; The method comprises: obtaining the first temperature; When the first power amplifier is at rated input power, the input power of the second power amplifier is reduced according to the first temperature to increase the target output power of the first antenna, where the target output power is associated with the gain of the first power amplifier and the insertion loss of the first RF path.

7. The method according to claim 6, characterized in that The step of reducing the input power of the second power amplifier according to the first temperature to increase the target output power of the first antenna includes: reducing the input power of the second power amplifier according to a mapping relationship between the first temperature and the output power difference of the first antenna; controlling the first power amplifier to be at a target temperature to increase the output power of the first antenna to a target output power; The output power difference of the first antenna is the difference between the first power and the second power, the first power being the output power of the first antenna when the first power amplifier is at the rated input power and the second power amplifier is not in a working state; the second power is the output power of the first antenna when the first power amplifier is at the rated input power and the second power amplifier is in a working state.

8. The method according to any one of claims 6 to 7, characterized in that: The insertion loss of the first radio frequency path includes the insertion loss of the filter, the insertion loss of the filter is positively correlated with the temperature, and the gain of the first power amplifier is negatively correlated with the temperature.

9. The method according to any one of claims 6 to 7, characterized in that: The first frequency band is a low frequency band, and the second frequency band is a medium frequency band or a high frequency band.

10. A non-volatile computer-readable storage medium, characterized in that: The computer storage medium stores a computer program, and when the computer program is executed, the method according to any one of claims 6 to 9 is implemented.

Images