CN114826293A

CN114826293A - Radio frequency system, wireless communication device and protection method of power amplifier

Info

Publication number: CN114826293A
Application number: CN202210411411.4A
Authority: CN
Inventors: 熊建才
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2022-04-19
Filing date: 2022-04-19
Publication date: 2022-07-29

Abstract

A radio frequency system, a wireless communication device and a protection method of a power amplifier are provided. The radio frequency system includes: a radio frequency path for transmitting a radio frequency signal in a first frequency band; the power amplifier is positioned on the radio frequency path and used for carrying out power amplification processing on the radio frequency signal; and the control module is used for controlling the input power of the power amplifier so that the input power of the power amplifier is smaller than the maximum allowable input power of the power amplifier. In the embodiment of the application, the input power of the power amplifier is controlled to be lower than the maximum allowable input power of the power amplifier, the PA is protected from being burnt, and the reliability of the PA is improved to a certain extent.

Description

Radio frequency system, wireless communication device and protection method of power amplifier

Technical Field

The present invention relates to the field of wireless communication technologies, and in particular, to a radio frequency system, a wireless communication device, and a protection method for a power amplifier.

Background

With the wide application of communication technology, wireless communication devices are increasingly used. In wireless communication devices, wireless communication is typically achieved through radio frequency circuitry. A Power Amplifier (PA) is an important component in a radio frequency circuit, and the radio frequency circuit generally amplifies power of a radio frequency signal through the PA. However, the power amplifier is easy to burn out during use, and the reliability problem occurs.

Disclosure of Invention

The embodiment of the application provides a radio frequency system, wireless communication equipment and a protection method of a power amplifier.

In a first aspect, a radio frequency system is provided, comprising: a radio frequency path for transmitting a radio frequency signal in a first frequency band; the power amplifier is positioned on the radio frequency path and used for carrying out power amplification processing on the radio frequency signal; and the control module is used for controlling the input power of the power amplifier so that the input power of the power amplifier is smaller than the maximum allowable input power of the power amplifier.

In a second aspect, a wireless communication device is provided, comprising: a fundamental frequency system for generating a fundamental frequency signal; the radio frequency system according to the first aspect, configured to generate a radio frequency signal according to the baseband signal.

In a third aspect, a protection method for a power amplifier is provided, where the radio frequency system includes: a radio frequency path for transmitting a radio frequency signal in a first frequency band; the power amplifier is positioned on the radio frequency path and used for carrying out power amplification processing on the radio frequency signal; a control module for controlling the input power of the power amplifier; the method comprises the following steps: controlling the input power of the power amplifier to be less than the maximum allowable input power of the power amplifier.

In a fourth aspect, there is provided a computer readable storage medium storing a computer program which, when executed, implements the method of the third aspect.

In the embodiment of the application, the input power of the power amplifier is controlled to be lower than the maximum allowable input power of the power amplifier according to the maximum allowable input power of the power amplifier. The input power of the power amplifier is reduced, the working current of the triode in the PA is reduced, and the working current is smaller than the triode device or the maximum allowable working current of the wiring, so that the current breakdown phenomenon can not be caused, the PA can not be burnt out, and the reliability of the PA is improved to a certain extent.

Drawings

Fig. 1 is a schematic diagram of a radio frequency system provided in the related art.

Fig. 2 is a schematic diagram of the relationship between voltage and current in a transistor provided by the related art.

Fig. 3 is a schematic diagram of a radio frequency system according to an embodiment of the present application.

Fig. 4 is a schematic structural diagram of a wireless communication device according to an embodiment of the present application.

Fig. 5 is a schematic flowchart of a protection method according to an embodiment of the present application.

Fig. 6 is a schematic flow chart of another protection method provided in the embodiment of the present application.

Fig. 7 is a schematic flowchart of another protection method provided in the embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments.

In recent years, with the development of communication technology, wireless communication devices are more and more widely used, and the wireless communication devices are also continuously updated and iterated. 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 having a wireless communication function. The wireless communication device mentioned in the embodiments of the present application may refer to a device providing voice and/or data connectivity to a user, and may be used for connecting people, things and machines, such as a handheld device having a wireless connection function, a vehicle-mounted device, and the like. The wireless communication device in the embodiment of the present application may be, for example, a mobile phone (mobile phone), a tablet computer (Pad), a notebook computer, a palm top computer, a Mobile Internet Device (MID), a wearable device, a Virtual Reality (VR) device, an Augmented Reality (AR) device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote surgery (remote medical supply), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), and the like.

Wireless communication devices typically include a baseband system and a radio frequency system. The base frequency system is used for generating base frequency signals, and the radio frequency system is used for converting the base frequency signals into radio frequency signals so as to transmit the radio frequency signals into a wireless radio frequency channel through the antenna.

The radio frequency system may include a radio frequency transceiver and a radio frequency path. The radio frequency transceiver may transmit radio frequency signals to a power amplifier of the radio frequency path. After the radio frequency signal is subjected to power amplification processing through the power amplifier, the expected transmission power can be achieved, and the radio frequency signal can be transmitted outwards through the antenna. The power amplifier can adjust the transmitting power of the radio frequency signal according to actual requirements, so that the requirements of different scenes on the transmitting power are met.

Power amplifiers are an important component in the radio frequency path. The proper operation of a power amplifier is of great importance to wireless communication devices. At present, in order to ensure the stability of power supply to the power amplifier, the related art generally uses a special radio frequency power supply to supply power to the power amplifier. The radio frequency power supply may be integrated on a chip to form a Radio Frequency (RF) power supply chip. The supply voltage required by the power amplifier is different for different transmit powers. In other words, the power amplifier has a requirement for the voltage range of the supply voltage supplied thereto by the radio frequency power supply. For example, the voltage range of the supply voltage provided by the rf power supply to the power amplifier may be 0.7V to 5V. The radio frequency power supply can adjust the supply voltage of the power amplifier within the voltage range according to the currently required transmission power.

Fig. 1 is a schematic diagram of a radio frequency system provided in the related art. As shown in fig. 1, the radio frequency system includes: a radio frequency transceiver 110, a radio frequency path 120, etc.

The radio frequency transceiver 110 has an output port connected to the radio frequency path 120. The radio frequency transceiver 110 may control the transmission frequency of the signal and adjust the transmission power of the signal.

The radio frequency path 120 may include a power amplifier 121, a power supply 122, a filter 123, an antenna 124, and the like. The power amplifier 121 is used to amplify the power of the transmission signal, and then the signal is transmitted through the antenna. The power supply 122 may adjust the supply voltage of the power amplifier within a certain range based on the currently required transmit power. The filter 123 is used for filtering the interference signal on the rf path 120. The antenna 124 is used for transmission and reception of radio frequency signals.

Different scenes have different requirements on the transmitting power of an antenna, and generally, a radio frequency transceiver detects the output power of an output end of a power amplifier through a feedback loop and determines the corresponding transmitting power of the radio frequency transceiver according to a return loss ratio (also called as reflection loss). The return loss is the ratio of the incident power to the reflected power of the radio frequency circuit, and is a mismatch problem of input and output in terms of power. For example, if 1mW (0dBm) of power is input to the antenna, if 10% of it is reflected (bounced back), the return loss is 10 dB. In the case of determining parameters such as element impedance, antenna efficiency, radiation field shape of the antenna, and the like of the radio frequency circuit, the return loss of the radio frequency circuit is also fixed.

The power amplifier is easy to burn out in the using process, and the reliability of a radio frequency access is influenced. Under some conditions, as shown in fig. 1, when a hardware abnormality occurs at the PA link post-stage, for example, the filter 123 or the antenna 124 is damaged, or the link insertion loss becomes large, which results in that the transmission power of the antenna 124 does not go, the controller is triggered to increase the PA input power to ensure the PA output power. While in practice the PA is at a fixed gain, as the PA input power increases, the output power of the PA increases accordingly. If the front-end link is broken, the rf transceiver will maximize the PA input power and also maximize the PA output power. Thus, the PA is saturated and if left in this state for a long time, the PA is easily burned out, resulting in reliability problems.

Analysis shows that the burning-out of the PA is mainly caused by two reasons, namely voltage breakdown of the internal triode of the PA and current breakdown of the internal triode of the PA.

As shown in FIG. 2, when the input VCC voltage of the PA exceeds the collector-emitter reverse breakdown voltage (i.e., BV) _CEO ) In time, the transistor undergoes avalanche breakdown. Wherein, BV _CEO Is collector-emitter reverse breakdown voltage, BV _CBO Is the collector-base reverse breakdown voltage, BV _CEO ＜BV _CBO 。

The main reason of the current breakdown is that the output power of the PA is too high, the device current capacity in the current path of the triode inside the PA is insufficient, the working current exceeds the maximum current capacity of the device or the circuit, and the working current appears in the area with the maximum current swing, so that the current breakdown is caused.

Therefore, in order to ensure the normal operation of the rf path and improve the operational reliability of the PA, it is an urgent need to develop a scheme for protecting the PA from being burned.

In view of the foregoing problems, an embodiment of the present application provides a radio frequency system, and the following describes an embodiment of the present application in detail.

Fig. 3 is a schematic diagram of a radio frequency system according to an embodiment of the present application. As shown in fig. 3, the radio frequency system includes: a radio frequency transceiver 210, a radio frequency path 220, a control circuit 230, etc.

The radio frequency transceiver 210 has an output connected to a radio frequency path 220. The radio frequency transceiver 210 may control the transmission frequency of the signal and adjust the transmission power of the signal.

The rf path 220 is connected to an output terminal of the rf transceiver 210, and may include a power amplifier 221, a power supply 222, a filter 223, an antenna 224, and the like.

The power amplifier 221 has a first input connected to the output of the radio frequency transceiver 210 for receiving the output power of the radio frequency transceiver, and a second input. A second input terminal is connected to the power supply 222 for receiving an input voltage. The power amplifier 221 is used to adjust the power of the amplified transmission signal. The power amplifier 221 may adjust the transmission power of the radio frequency signal according to actual requirements, so as to meet different requirements of different scenarios on the transmission power.

The power supply 222 may adjust the power amplifier supply voltage based on the currently required transmit power.

The filter 223 is used to filter out the interference signal on the rf path 220.

The antenna 224 is used for transmitting and receiving radio frequency signals.

The control circuit 230 is connected to the rf transceiver 210, and the control circuit 230 ensures that the PA input power is within a certain range, and controls the input power of the power amplifier to be lower than the maximum allowable input power of the power amplifier. If the front end hardware is abnormal or the link is disconnected, which causes the transmission power of the antenna 224 to be lost, the controller is triggered to increase the PA input power to ensure the PA output power. As the PA input power increases, the output power of the PA increases accordingly. If the rf transceiver increases the PA input power to the maximum allowed input power, the PA output power will not increase after the maximum. Therefore, the output power of the PA is ensured to be within a certain range, and the PA is ensured to be within a reliable range under any condition and not to be burnt.

In some implementations, the power may be controlled such that the input power is lower than the maximum allowed input power of the power amplifier. In some implementations, Relative Gain Indication (RGI) may also be used to correspond to different powers, making the input power lower than the maximum allowed input power of the power amplifier. The RGI may be used to correspond to different input powers, for example, by a feedback receive loop (FBRX), an Average Power Tracking (APT) technique, an Envelope Tracking (ET) technique, or the like. Alternatively, the composition of the input power, such as the input voltage, may also be controlled, and the input voltage may be controlled to be lower than the maximum allowable input voltage of the power amplifier, so that the input power is lower than the maximum allowable input power of the power amplifier.

In some implementations using RGI control, the maximum input power of the corresponding PA is first identified, which can be obtained from specifications, etc. Then, the relation between the output power of the output end of the radio frequency transceiver and the RGI is measured, the output power of the output end of the transceiver is the input power of the input end of the PA, and the maximum RGI which needs to be limited for calibrating the maximum input power of the PA is found out.

The PA may operate in different frequency bands, and the maximum input power corresponding to the PA may be different in different operating frequency bands. Aiming at different working frequency bands of the PA, firstly, the maximum input power of the corresponding working frequency band of the PA is confirmed, then the relation between the output power of the radio frequency transceiver in the different working frequency bands and the corresponding RGI is measured, and the maximum RGI of the different working frequency bands of the PA, which needs to be calibrated and limited, is found out.

The mapping relationship between the output power of the calibrated radio frequency transceiver in different working frequency bands and the corresponding RGIs can be stored in a memory of the terminal device, and can also be stored in a cloud server. On the memory of the terminal device, in some implementations, it may be stored on an internal memory, such as a Random Access Memory (RAM), to limit the calibrated PA input power. For example, a feedback receive loop, an average power tracking technique, or an envelope tracking technique may invoke a mapping of the output power of different operating bands of the radio frequency transceiver and corresponding RGIs stored on RAM, limiting the calibrated PA input power. Optionally, it may also be stored in a nonvolatile memory (NVM) to limit the input power of the PA.

The primary purpose of the RAM is to store code and data for the controller to call when needed. The contents of the RAM memory cells can be fetched or stored as needed, and the access speed is independent of the location of the memory cells, but such memories lose their contents when power is removed.

And a control circuit 230 for controlling the RGI of the output of the rf transceiver to be lower than the corresponding RGI of the maximum allowable input power of the power amplifier according to the relationship between the output power of the calibrated rf transceiver in different operating frequency bands and the corresponding RGI. Therefore, the output power of the radio frequency transceiver can be limited to be lower than the maximum allowable input power of the power amplifier, so that the input power of the power amplifier is ensured to be within the allowable range of normal operation, and the PA is ensured not to be burnt.

In some implementations, the input power of the PA may be controlled by an RGI of a feedback receive loop connected to the radio frequency transceiver. The feedback receiving loop may detect a power parameter, a phase parameter, etc. of the signal at the output of the power amplifier. The feedback receiving loop controls the RGIs of the radio frequency transceiver in different working frequency bands according to the relationship between the output power of the pre-stored and calibrated radio frequency transceiver in different working frequency bands and the corresponding RGIs, so that the output power corresponding to the RGIs is lower than the maximum allowable input power of the PA.

Referring to fig. 3, an exemplary operation process of a radio frequency system for limiting a calibrated PA input power based on an FBRX method according to an embodiment of the present application is described as follows:

the method comprises the following steps: the maximum allowed input power for the different operating frequency bands of the PA is first identified.

Step two: and then measuring the relationship between the output power of the radio frequency transceiver in different working frequency bands and the corresponding RGI, wherein the output power of the radio frequency transceiver is the input power of the PA, and finding out the calibrated maximum RGI which is limited by the maximum allowable input power of the PA in different working frequency bands. The corresponding relationship between the RGI of the middle frequency band of Long Term Evolution (LTE) and the output power of the RF transceiver is obtained as shown in Table 1.

Table 1 shows the correspondence between the RGI of the frequency band of the LTE intermediate frequency and the output power of the radio frequency transceiver. As shown in table 1, in the correspondence relationship between the RGI of the B1 band in LTE and the output power of the rf transceiver, if the maximum allowed input power of the PA is 6dBm, and the corresponding RGI is found to be 69, the maximum RGI value set in the calibration parameter is not allowed to exceed 69.

TABLE 1

The relationship between the output power of the radio frequency transceiver in different operating frequency bands and the corresponding RGI is measured, and the corresponding relationship between the RGI in the LTE B1 frequency band and the output power of the radio frequency transceiver is obtained as shown in Table 2, and only part of the data is schematically shown. For control of subsequent steps. Table 2 shows partial data of the correspondence between the RGI of the LTE B1 band and the output power of the rf transceiver.

TABLE 2

RGI	1	2	3	4	5	6	7	8	9	10	11
												PWR(dB)	-160	-155	-143	-133	-123	-112	-102	-92	-83	-73	-67
RGI	12	13	14	15	16	17	18	19	20	21	22
												PWR(dB)	-55	-46	-35	-24	-13	-3	8	19	30	40	51
RGI	23	24	25	26	27	28	29	30	31	32	33
												PWR(dB)	61	73	84	95	108	119	132	143	155	166	177

Step three: and controlling the RGI of the output end of the radio frequency transceiver to be lower than the maximum RGI corresponding to the maximum allowable input power of the power amplifier according to the relationship between the output power of the calibrated radio frequency transceiver in different working frequency bands and the corresponding RGI.

Controlling the RGI of the output end of the radio frequency transceiver to be lower than 69 according to the relationship between the output power of the calibrated radio frequency transceiver in different working frequency bands and the corresponding RGI (shown in the table 2) and the maximum RGI value 69. Therefore, the output power of the radio frequency transceiver can be limited to be lower than the maximum allowable input power of the power amplifier, and the input power of the power amplifier is ensured to be within the allowable range of normal operation.

In some implementations, the input power of the PA may be controlled by sweeping the RGI through an average power tracking technique such that the RGI swept by the APT technique is not allowed to exceed the maximum RGI. APT is also called adaptive voltage regulation, which is a technique for automatically adjusting the operating voltage of a PA according to the pre-output power of the PA in combination with its own parameters.

In some implementations, the input power of the PA may also be controlled by scanning the RGI through the ET technique such that the RGI scanned by the ET technique is not allowed to exceed the maximum RGI. As mentioned above, the maximum allowed input power to the PA is 6dBm, which limits the output power of the rf transceiver to within 6dBm, thereby ensuring that the input power of the PA does not exceed 6 dBm. The basic working principle of ET is as follows: the envelope signal (envelope signal) is calculated by the radio frequency processing unit and the fundamental frequency processing unit according to the radio frequency signal, the power level and the characteristic parameters of the power amplifier, meanwhile, a differential digital-to-analog converter in the radio frequency and fundamental frequency units can provide an analog reference signal, the envelope signal can be amplified by the power supply of the ET and then sent to the PA, meanwhile, the radio frequency signal can be amplified by the PA, the RF signal and the working voltage of the PA can follow, finally, the amplified signal is sent to the duplexer by the PA, the duplexer can attenuate the signal outside the bandwidth, and meanwhile, useful signals are highlighted. ET establishes a link between the working voltage of the PA and the input radio frequency signal to enable the working voltage and the input radio frequency signal to follow each other in real time, and therefore the working efficiency of the PA is improved.

When the controller power is turned off or suddenly and accidentally turned off, data in the internal memory of the controller is easily lost. In some implementations, the PA may be stored on a non-volatile memory (NVM) to limit the input power of the PA. The nonvolatile memory is used for preventing data in the nonvolatile memory from being lost when the computer is turned off or is suddenly and unexpectedly turned off, and the nonvolatile memory is similar to an external memory such as a hard disk. Such as read-only memory (ROM) and Flash Memory (FM).

Table 3 shows the RGI values corresponding to the maximum allowed output powers of the rf transceivers of different communication systems. Referring to fig. 3, the operation of a radio frequency system for limiting PA input power by non-volatile memory-based operation is described as follows, which mainly includes the following three steps:

the method comprises the following steps: the maximum allowed input power for different operating frequency bands of the PA is first identified.

TABLE 3

Communication system	LTE	LTE	LTE	LTE	LTE	LTE	WCDMA	WCDMA	WCDMA
										Frequency band	1	2	3	4	34	39	2	1	5
RGI	67	67	65	64	64	63	55	53	50

Step two: and then measuring the relationship between the output power of the radio frequency transceiver in different working frequency bands and the corresponding RGIs, and finding out the maximum RGIs limited by the maximum allowable input power of the calibrated PA in different working frequency bands. The corresponding relations between the output power and the RGI of the approved radio frequency transceiver in different working frequency bands are obtained and stored in the nonvolatile memory.

Step three: and controlling the RGI of the output end of the radio frequency transceiver to be lower than the maximum RGI corresponding to the maximum allowable input power of the power amplifier according to the relationship between the output power of the calibrated radio frequency transceiver in different working frequency bands and the corresponding RGI and the maximum RGI value. Therefore, the output power of the radio frequency transceiver can be limited to be lower than the maximum allowable input power of the power amplifier, and the input power of the power amplifier is ensured to be within the allowable range of normal operation.

In some implementations, the RGI for calibration can be limited to be lower than the PA input power using FBRX, APT, or ET techniques alone, or the input power of the PA can be limited using NVM storage RGI alone. In some implementations, it is also possible to limit the calibrated RGI below the PA input power using one of FBRX, APT, or ET techniques in combination with limiting the input power of the PA using NVM to store the RGI.

An embodiment of the present application further provides a wireless communication device, and fig. 4 is a schematic structural diagram of a wireless communication device provided in an embodiment of the present application. As shown in fig. 4, the wireless communication device 400 may include a baseband system 410 and a radio frequency system 420. The baseband system 410 may be used to generate baseband signals. The radio frequency system 420 may be used to generate radio frequency signals from the baseband signals generated by the baseband system 410. The rf system 420 may be any one of the rf systems described in any of the embodiments above.

The device embodiments of the present application are described in detail above in connection with fig. 1 to 4. Method embodiments of the present application are described in detail below with reference to fig. 5-7. It is to be understood that the description of the method embodiments corresponds to the description of the apparatus embodiments, and therefore reference may be made to the preceding apparatus embodiments for parts which are not described in detail.

Fig. 5 is a schematic flow chart of a protection method provided in an embodiment of the present application. The method of fig. 5 may be applied to the radio frequency system mentioned in any of the previous embodiments.

The radio frequency system includes: a radio frequency path for transmitting a radio frequency signal in a first frequency band; the power amplifier is positioned on the radio frequency path and used for carrying out power amplification processing on the radio frequency signal; and the control module is used for controlling the input power of the power amplifier.

The method of fig. 5 may include step S510 and step S520, which are exemplified in detail below.

In step S510, maximum allowable input powers for different operating frequency bands of the PA are confirmed.

In step S520, the input power of the PA is limited to be lower than the maximum input power of the current operating frequency band of the PA.

In some implementations, the output power of the radio frequency transceiver in different operating frequency bands may be measured, where the output power of the radio frequency transceiver is the input power of the PA, and the output power of the radio frequency transceiver is controlled to be lower than the maximum input power of the PA in the current operating frequency band. In some implementations, the relative gain indication may also be used to correspond to different powers, with the input power being lower than the maximum allowed input power of the power amplifier. The RGI may be used to correspond to different input powers, e.g., by FBRX, APT techniques, ET techniques, or the like. Alternatively, the composition of the input power, such as the input voltage, may also be controlled, and the input voltage may be controlled in such a way that the input voltage is lower than the maximum allowable input voltage of the power amplifier, and thus the input power is lower than the maximum allowable input power of the power amplifier.

In some implementations of the exemplary method of fig. 5, the RGI of the calibration may be limited to be lower than the PA input power using FBRX, APT, or ET techniques alone, or the input power of the PA may be limited using NVM storage RGI alone. In some implementations, it is also possible to limit the calibrated RGI below the PA input power using either FBRX, APT, or ET techniques in combination with the use of NVM to store the RGI.

Fig. 6 is a schematic flow chart of another protection method provided in an embodiment of the present application, where the method is based on a control manner of the FBRX. As shown in fig. 6, the method includes steps S610 to S630.

In step S610, maximum allowable input powers for different operating bands of the PA are confirmed.

In step S620, the relationship between the output power of the rf transceiver in different operating bands and the corresponding RGI is measured, where the output power of the rf transceiver is the input power of the PA, and the calibrated maximum RGI required to be limited by the maximum allowed input power of the PA in different operating bands is found.

In step S630, according to the relationship between the output power of the calibrated rf transceiver in different operating bands and the RGI of the corresponding FBRX, the RGI of the output terminal of the rf transceiver is controlled to be lower than the maximum RGI corresponding to the maximum allowable input power of the current operating band of the power amplifier.

In some implementations of the protection method in the embodiment of fig. 6, the rpi may also be scanned by the APT technique to control the input power of the PA, so that the rpi scanned by the APT technique is not allowed to exceed the maximum RGI corresponding to the maximum allowable input power of the current operating frequency band of the power amplifier.

In some implementations of the protection method in the embodiment of fig. 6, the input power of the PA may also be controlled by scanning the RGI through the ET technique, so that the RGI scanned through the ET technique is not allowed to exceed the maximum RGI corresponding to the maximum allowable input power of the current operating frequency band of the power amplifier.

Fig. 7 is a schematic flow chart of another protection method provided in the embodiment of the present application, which is a control method based on NVM storage. As shown in fig. 7, the method includes steps S710 to S730.

In step S710, maximum allowable input powers for different operating bands of the PA are determined.

In step S720, the relationship between the output power of the rf transceiver in different operating bands and the corresponding RGI is measured, where the output power of the rf transceiver is the input power of the PA, and the calibrated maximum RGI required to be limited by the maximum allowed input power of the PA in different operating bands is found. And storing the mapping relation between the output power of the calibrated radio frequency transceiver in different working frequency bands and the corresponding RGIs on a nonvolatile memory.

In step S730, according to the relationship between the output power of the calibration rf transceiver in different operating bands and the corresponding RGI stored in the non-volatile memory, the RGI at the output end of the rf transceiver is controlled to be lower than the maximum RGI corresponding to the maximum allowable input power of the current operating band of the power amplifier.

Embodiments of the present application also provide a computer-readable storage medium, which stores a computer program, and when the computer program is executed, the method steps are implemented.

The embodiment of the application controls the input power of the power amplifier to be lower than the maximum allowable input power of the power amplifier according to the maximum allowable input power of the calibrated power amplifier. The input power of the power amplifier is reduced, the working current of the triode in the PA is reduced, and the working current is smaller than the triode device or the maximum allowable working current of the wiring, so that the current breakdown phenomenon can not be caused, the PA can not be burnt out, and the reliability of the PA is improved to a certain extent.

It should be understood that, in various embodiments of the present application, "first", "second", and the like are used for distinguishing different objects, and are not used for describing a specific order, the order of execution of the above-mentioned processes is not meant to indicate the order of execution, and the order of execution of the processes should be determined by their functions and inherent logic, and should not constitute any limitation to the implementation processes of the embodiments of the present application.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

In all embodiments provided in the present application, it should be understood that when a portion is referred to as being "connected" or "connected" to another portion, it means that the portion can be not only "directly connected" but also "electrically connected" with another element interposed therebetween. In addition, the term "connected" also means that the parts are "physically connected" as well as "wirelessly connected". In addition, when a portion is referred to as "comprising" an element, it means that the portion may include another element without excluding the other element unless otherwise stated.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via a wired (e.g., coaxial cable, fiber optic cable, Digital Subscriber Line (DSL), or wireless (e.g., infrared, wireless, microwave, etc.) link.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A radio frequency system, comprising:

a radio frequency path for transmitting a radio frequency signal in a first frequency band;

the power amplifier is positioned on the radio frequency path and used for carrying out power amplification processing on the radio frequency signal;

and the control module is used for controlling the input power of the power amplifier so that the input power of the power amplifier is smaller than the maximum allowable input power of the power amplifier.

2. The radio frequency system according to claim 1, wherein the controlling the input power of the power amplifier such that the input power of the power amplifier is less than a maximum allowed input power of the power amplifier comprises:

and controlling the relative gain index of the first frequency band so that the relative gain index of the first frequency band is smaller than a target relative gain index, wherein the target relative gain index is the relative gain index corresponding to the maximum allowable input power.

3. The radio frequency system of claim 2, wherein the controlling the relative gain index of the first frequency band comprises:

calibrating the relative gain index of the first frequency band using one or more of a feedback receive loop FBRX, an average power tracking APT, and an envelope tracking ET such that the relative gain index of the first frequency band is less than the target relative gain index.

4. The radio frequency system of claim 2, wherein the controlling the relative gain index of the first frequency band comprises:

controlling the relative gain index of the first frequency band so that the relative gain index of the first frequency band is smaller than the target relative gain index recorded in the memory.

5. A wireless communication device, comprising:

a fundamental frequency system for generating a fundamental frequency signal;

the radio frequency system of any one of claims 1-4, configured to generate a radio frequency signal from the fundamental frequency signal.

6. A protection method for a power amplifier, applied to a radio frequency system, the radio frequency system comprising:

a control module for controlling the input power of the power amplifier so that the input power of the power amplifier is less than the maximum allowable input power of the power amplifier;

the method comprises the following steps:

and controlling the input power of the power amplifier to be smaller than the maximum allowable input power of the power amplifier according to the maximum allowable input power of the power amplifier.

7. The method of claim 6, wherein the controlling the input power of the power amplifier to be less than a maximum allowed input power of the power amplifier comprises:

8. The method of claim 7, wherein the controlling the relative gain index of the first frequency band comprises:

9. The method of claim 7, wherein the controlling the relative gain index of the first frequency band comprises:

10. A computer-readable storage medium, characterized in that the computer storage medium stores a computer program which, when executed, implements the method of any of claims 6-9.