CN115085826A - Transmission power detection circuit, method and wireless communication device - Google Patents
Transmission power detection circuit, method and wireless communication device Download PDFInfo
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Abstract
The invention discloses a transmission power detection circuit, a method and a wireless communication device, wherein the circuit comprises: a baseband processor; the zero intermediate frequency architecture transmitter is used for modulating and up-converting the analog baseband signal into a radio frequency signal; the power amplifier is used for amplifying the radio frequency signal so that the transmission power of the radio frequency signal reaches a target power value; the coupler is used for coupling the amplified radio-frequency signal to obtain a coupled radio-frequency signal: a zero intermediate frequency architecture receiver for converting the coupled radio frequency signal to the analog baseband signal; the baseband processor is also connected with the zero intermediate frequency architecture receiver and is used for converting the analog baseband signal into a digital baseband signal and calculating the transmitting power of the acquired radio frequency signal according to the digital baseband signal. The invention reduces the difficulty of circuit design, reduces the circuit size, and has simpler debugging and easy signal restoration due to simple circuit.
Description
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a transmission power detection circuit, a transmission power detection method, and a wireless communication device.
Background
Due to the development of wireless communication technology, the transmission power detection method has been gradually upgraded from 4G to 5G, and the development of the technology also puts more stringent requirements on radio frequency performance. Regulations co-existing with other wireless networks require tight control of transmit power, and in addition, precise RF power control can improve radio frequency spectrum performance and save transmitter power amplifier cost and power consumption. Real-time power detection of the RF signal is essential to achieve accurate control of the RF power.
The detection mode of the transmitting power in the prior art is usually built by using discrete devices, the circuit is complex, the debugging is difficult, and the original signal cannot be restored.
Disclosure of Invention
Embodiments of the present invention provide a transmission power detection circuit, a transmission power detection method, and a wireless communication device, which reduce circuit design difficulty and circuit size, and make debugging simpler and easy to restore signals due to simple circuits.
In a first aspect, to achieve the above object, an embodiment of the present invention provides a transmission power detection circuit, including:
a baseband processor;
the zero intermediate frequency architecture transmitter is connected with the baseband processor and is used for modulating and up-converting the analog baseband signals into radio frequency signals;
the power amplifier is connected with the zero intermediate frequency architecture transmitter and used for amplifying the radio frequency signal so as to enable the transmission power of the radio frequency signal to reach a target power value;
the coupler is connected with the power amplifier and used for coupling the amplified radio-frequency signal to obtain a coupled radio-frequency signal:
a zero intermediate frequency architecture receiver connected with the coupler for converting the coupled radio frequency signal into the analog baseband signal;
the baseband processor is also connected with the zero intermediate frequency architecture receiver and is used for converting the analog baseband signal into a digital baseband signal and calculating the transmitting power of the acquired radio frequency signal according to the digital baseband signal.
In a second aspect, to solve the same technical problem, an embodiment of the present invention provides a transmission power detection method applied to the transmission power detection circuit, including:
the coupler is controlled to carry out coupling processing on the radio-frequency signal amplified by the power amplifier to obtain a coupled radio-frequency signal:
controlling a zero intermediate frequency architecture receiver to convert the coupled radio frequency signal into an analog baseband signal;
and controlling a baseband processor to convert the analog baseband signal into a digital baseband signal, and calculating the transmitting power of the acquired radio frequency signal according to the digital baseband signal.
In a third aspect, to solve the same technical problem, an embodiment of the present invention provides a wireless communication device, including the transmission power detection circuit.
The embodiment of the invention provides a transmission power detection circuit, a transmission power detection method and wireless communication equipment, wherein a zero intermediate frequency architecture is adopted to realize power detection, a local oscillator and a mixer are integrated through the zero intermediate frequency architecture, compared with a circuit of a discrete device, the transmission power detection circuit is simpler, more convenient to debug and smaller in circuit area, and a baseband signal can be obtained to sense transmission signal distortion.
Drawings
Fig. 1 is a schematic structural diagram of a transmission power detection circuit according to an embodiment of the present invention;
fig. 2 is a schematic diagram of another structure of a transmission power detection circuit according to an embodiment of the present invention;
fig. 3 is a schematic flowchart of a method for detecting transmission power according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a wireless communication device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be understood that the various steps recited in the method embodiments of the present disclosure may be performed in a different order, and/or performed in parallel. Moreover, method embodiments may include additional steps and/or omit performing the illustrated steps. The scope of the present disclosure is not limited in this respect.
The term "include" and variations thereof as used herein are open-ended, i.e., "including but not limited to". The term "based on" is "based, at least in part, on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Relevant definitions for other terms will be given in the following description.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a transmission power detection circuit according to an embodiment of the present invention, including:
a baseband processor 10;
specifically, the baseband processor 10 is a highly complex system on a chip (SoC), the baseband processor 10 can synthesize a baseband signal to be transmitted and decode a received baseband signal, and the baseband processor 10 not only supports several communication standards but also provides multimedia functions and interfaces for multimedia displays, image sensors and audio devices.
A zero intermediate frequency architecture transmitter 20, connected to the baseband processor 10, for modulating and up-converting the analog baseband signal into a radio frequency signal;
specifically, a Zero Intermediate Frequency (ZIF) architecture can integrate more functions, and a zero intermediate frequency design not only can realize high performance, but also has great flexibility, and can support frequencies and bandwidths with ultra-wide ranges and maintain nearly flat performance. Meanwhile, the Zero Intermediate Frequency (ZIF) architecture can reduce the radio frequency filter, so that the size of the PCB wireless communication equipment can be greatly reduced, the high-speed process of a frequency band is simplified, and the energy input during size change can be reduced. Except that the zero-if architecture transmitter 20 is connected to the baseband processor 10 and configured to modulate and up-convert the analog baseband signal output by the baseband processor 10 into a radio frequency signal, the zero-if architecture transmitter 20 is connected to an antenna through a power amplifier 30 and a coupler 40, so that the radio frequency signal amplified by the power amplifier 30 is transmitted through the antenna, and thus other wireless communication devices can receive the radio frequency signal transmitted by themselves.
The power amplifier 30 is connected to the zero intermediate frequency architecture transmitter 20, and is configured to amplify the radio frequency signal so that the transmission power of the radio frequency signal reaches a target power value;
the coupler 40 is connected to the power amplifier 30, and configured to perform coupling processing on the amplified radio frequency signal to obtain a coupled radio frequency signal:
specifically, the coupler 40 couples a portion of the energy out of the signal, and the coupled energy is commonly used for signal detection or monitoring, such as power measurement and detection.
The coupler 40 of the present invention is a directional coupler 40, and the directional coupler 40 is a common microwave/millimeter wave component in microwave measurement and other microwave systems, and can be used for signal isolation, separation and mixing, such as power monitoring, source output power stabilization, signal source isolation, transmission and reflection sweep test, etc. The directional coupler 40 is a directional microwave power divider, which mainly includes two portions of a main line and a sub line, which are coupled to each other through various types of small holes, slits, gaps, and the like. Therefore, a part of the power inputted from the '1' on the main line end is coupled into the secondary line, and due to the interference or superposition of the waves, the power is transmitted only along one direction of the secondary line (called 'forward direction'), while almost no power is transmitted in the other direction (called 'reverse direction'), thereby obtaining a coupled radio frequency signal. Illustratively, coupler 40 of the present invention is model number CP0603A3500 GN.
A zero intermediate frequency architecture receiver 50 connected to the coupler 40 for converting the coupled radio frequency signal into the analog baseband signal;
specifically, the zero-if architecture transmitter 20 is connected to the coupler 40 for demodulating and down-converting the coupled rf signal output by the coupler 40 into an analog baseband signal, and the zero-if architecture receiver 50 is connected to the antenna through the coupler 40 for receiving rf signals transmitted by other wireless communication devices through the antenna.
The baseband processor 10 is further connected to the zero intermediate frequency architecture receiver 50, and is configured to convert the analog baseband signal into a digital baseband signal, and calculate the transmission power of the acquired radio frequency signal according to the digital baseband signal.
Specifically, the coupler 40 of the present invention performs coupling processing on a tiny part of the transmission signal to obtain a coupled radio frequency signal, and transmits the coupled radio frequency signal to the zero intermediate frequency architecture receiver 50, the zero intermediate frequency architecture receiver 50 processes the coupled radio frequency signal to convert the coupled radio frequency signal into an analog baseband signal, the baseband processor 10 converts the analog baseband signal into a digital baseband signal, and then the baseband processor 10 calculates the digital baseband signal to obtain the transmission power of the acquired radio frequency signal.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a transmit power detection circuit according to an embodiment of the present invention, where the baseband processor 10 includes: the digital-to-analog conversion module DAC and the analog-to-digital conversion module ADC are connected;
the digital-to-analog conversion module DAC is used for generating corresponding analog baseband signals according to the baseband digital quantity;
the analog-to-digital conversion module ADC is used for performing analog-to-digital conversion on the radio frequency signal to obtain a corresponding digital baseband signal.
Specifically, if the transmission power of the wireless communication device needs to be detected and even adjusted, these analog quantities need to be converted into digital quantities that can be recognized by the computer, and the digital quantities analyzed and processed by the computer need to be converted into corresponding analog quantities to achieve effective control of the controlled object, which requires a digital-to-analog conversion module DAC and an analog-to-digital conversion module ADC that can play a role of a bridge between the analog quantities and the digital quantities.
The base band digital quantity is expressed by combining the codes according to the digit, in order to convert the base band digital quantity into the analog quantity, the code of each digit is converted into the corresponding analog quantity according to the size of the bit weight, and then the analog quantities are added to obtain the total analog quantity which is in direct proportion to the digital quantity, thereby realizing the digital-to-analog conversion and obtaining the corresponding analog base band signal.
The radio frequency signal is modulated and has an electrical wave with a certain transmission frequency. The base station transmits radio frequency signals in an analog form through an antenna, namely, baseband digital quantity is simulated through a digital-to-analog conversion module DAC to generate analog baseband signals, and then the analog baseband signals are modulated through a plurality of rows of frequency mixing to obtain radio frequency signals in an analog form so as to be transmitted through the antenna. In addition, the input radio frequency signal in analog form is converted into a digital baseband signal proportional to the radio frequency signal by the analog-to-digital conversion module ADC.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a transmit power detection circuit according to an embodiment of the present invention, where the baseband processor 10 further includes:
the comparison module is used for comparing the calculated transmitting power with a power threshold range; the power threshold range comprises a coarse adjustment range and a fine adjustment range;
and a processing module, configured to adjust the transmission power of the zero intermediate frequency architecture transmitter 20 to implement coarse tuning if it is determined according to the comparison result that the calculated transmission power is within the coarse tuning range, and adjust the transmission power of the baseband digital quantity to implement fine tuning if it is determined according to the comparison result that the calculated transmission power is within the fine tuning range.
Specifically, the transmitting power is compared with a corresponding power threshold, and the baseband digital quantity is updated according to the comparison result, so that the baseband processor 10 adjusts the corresponding transmitting power and transmits the radio frequency signal according to the adjusted transmitting power.
The corresponding power threshold may be one or multiple, and is preset. Each power threshold may correspond to a transmission power step, such as first gear, second gear, etc. It will be appreciated that each gear corresponds to a transmit power.
In a real scene, various interferences exist in the air, so that the numerical value of the transmitting power acquired at a single time is relatively inaccurate. Meanwhile, too frequent adjustment of the transmission power may also affect the receiving performance of the receiving device. Thus, the transmit power may be adjusted by an average of the plurality of transmit powers.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a baseband processor 10 according to an embodiment of the present invention, where the zero-if architecture transmitter 20 includes: a first I-phase mixer M1, a first Q-phase mixer M2, a first local oscillator LO1, a summing amplifier M5, and a preamplifier PreAmp;
the first local oscillator LO1 is connected to the first I-phase mixer M1 and the first Q-phase mixer M2, and configured to output a first local oscillation signal to the first I-phase mixer M1 and output a second local oscillation signal to the first Q-phase mixer M2;
specifically, in signal analysis, the signal is usually subjected to vector decomposition, that is, the signal is decomposed into two components with the same frequency and the same peak amplitude but with a phase difference of 90. The digital baseband signal, the radio frequency signal, the analog baseband signal and the coupling radio frequency signal can be expressed by vectors.
A mixer, which may be referred to as a "frequency converter" or "frequency converter," converts the frequency of an input signal to another frequency, such as an output signal frequency equal to the sum, difference, or other combination of the two input signal frequencies. The mixer is usually made up of a non-linear element and a frequency selective loop. The mixer of the present invention is a complex mixer.
The LOCAL OSCILLATOR (LOCAL OSCILLATOR), also called LOCAL OSCILLATOR, is a free-running sine wave OSCILLATOR. The local oscillator can generate a high-frequency sine wave signal with equal amplitude and a middle frequency higher than the received signal, and the local oscillator signal is injected into the mixer to be mixed with the high-frequency television signal to obtain an intermediate-frequency television signal.
The use of a local oscillator with a mixer can alter the signal frequency. This frequency conversion process (also known as heterodyning) produces sum and difference frequencies from the frequency of the local oscillator and the frequency of the input signal. Processing the signal at a fixed frequency may improve the performance of the radio receiver.
The first I-phase mixer M1 is connected to the digital-to-analog conversion module DAC and the first local oscillator LO1, and configured to receive a first I-phase orthogonal signal I1 in the analog baseband signal, and perform up-conversion processing on the first I-phase orthogonal signal I1 and the first local oscillator signal to obtain an I-phase up-conversion signal;
the first Q-phase mixer M2 is connected to the digital-to-analog conversion module DAC and the first local oscillator LO1, and configured to receive a first Q-phase quadrature signal Q1 in the analog baseband signal, and perform up-conversion processing on the first Q-phase quadrature signal Q1 and the second local oscillator signal to obtain a Q-phase up-conversion signal;
the summing amplifier M5 is connected to the first I-phase mixer M1 and the first Q-phase mixer M2, and is configured to sum the I-phase up-converted signal and the Q-phase up-converted signal to output the radio frequency signal;
the preamplifier PreAmp is connected with the summing amplifier M5, and is configured to amplify the radio frequency signal.
In particular, upconversion is used in transmitters that convert a lower intermediate or baseband frequency to a higher intermediate or radio frequency in order to provide more efficient power transfer in the transmitter. That is, the present invention performs an up-conversion process on the first I-phase orthogonal signal I1 and the first local oscillator signal to obtain an I-phase up-converted signal, performs an up-conversion process on the first Q-phase orthogonal signal Q1 and the second local oscillator signal to obtain a Q-phase up-converted signal, and finally performs a summation process on the I-phase up-converted signal and the Q-phase up-converted signal through the summation amplifier M5 to output a radio frequency signal.
The functions of the local oscillator and the mixer in the present invention are combined in a zero intermediate frequency architecture transmitter, thereby reducing space, cost and power consumption.
Referring to fig. 2, the zero intermediate frequency architecture receiver 50 includes: a second I-phase mixer M3, a second Q-phase mixer M4, a second local oscillator LO2, a low noise power amplifier LNA;
the low noise power amplifier LNA is connected with the coupler 40 and is used for receiving the coupled radio frequency signal;
in particular, the coupled rf signals of the present invention can also be expressed as vectors. The mixer is located behind the low noise amplifier, and can directly process the radio frequency signal amplified by the low noise amplifier. In order to realize the frequency mixing function, the frequency mixer also needs to receive a local oscillation signal from a local oscillator, and the circuit of the frequency mixer completely works in a radio frequency band.
The second local oscillator LO2 is connected to the second I-phase mixer M3 and the second Q-phase mixer M4, and configured to output a third local oscillation signal to the second I-phase mixer M3 and output a fourth local oscillation signal to the second Q-phase mixer M4;
the second I-phase mixer M3 is connected to the analog-to-digital conversion module ADC and the second local oscillator LO2, and configured to perform down-conversion processing on the third local oscillator signal and a second I-phase orthogonal signal in the coupled radio frequency signal to obtain an I-phase down-converted signal I2, and send the I-phase down-converted signal I2 to the analog-to-digital conversion module ADC;
the second Q-phase mixer M4 is connected to the analog-to-digital conversion module ADC and the second local oscillator LO2, and configured to perform down-conversion processing on the fourth local oscillator signal and a second Q-phase orthogonal signal in the coupled radio frequency signal to obtain a Q-phase down-converted signal Q2, and send the I-phase down-converted signal I2 to the analog-to-digital conversion module ADC.
In particular, down-conversion is in a receiver that converts a radio frequency or higher frequency to a lower intermediate frequency or baseband, making the signal easier to process in a radio frequency receiver. That is to say, the present invention performs down-conversion processing on the second I-phase orthogonal signal and the third local oscillator signal to obtain an I-phase down-converted signal I2, and sends the I-phase down-converted signal I2 to the analog-to-digital conversion module ADC, and performs down-conversion processing on the second Q-phase orthogonal signal and the fourth local oscillator signal to obtain a Q-phase down-converted signal Q2, and finally sends the I-phase down-converted signal I2 and the Q-phase down-converted signal Q2 to the analog-to-digital conversion module ADC through the summing amplifier M5.
The functions of the local oscillator and mixer of the present invention are combined in a zero intermediate frequency architecture receiver 50, thereby reducing space, cost and power consumption. The transmission power detection circuit of the present invention mainly comprises a baseband processing chip 10 with a DSP core, a zero-if architecture transmitter 20 (i.e., RFIC in fig. 2), a zero-if architecture receiver 50 (i.e., OBS in fig. 2), a power amplifier 30 (i.e., SPA in fig. 2), and a coupler 40 (i.e., Coupling in fig. 2).
Referring to fig. 2, the analog-to-digital conversion module ADC is configured to perform analog-to-digital conversion on a radio frequency signal composed of the I-phase down-conversion signal and the Q-phase down-conversion signal to obtain a corresponding digital baseband signal.
Referring to fig. 2, the baseband processor 10 further includes:
and the calculation module is used for calculating to obtain the intensity of the received signal according to the digital baseband signal and carrying out inverse operation calculation according to the intensity of the received signal to obtain the transmitting power.
Wherein the calculation module comprises:
the signal calculation unit is used for substituting the signal data of the digital baseband signal into the following formula to calculate the received signal strength of the radio frequency signal; the digital baseband signal is characterized according to the form of the I/Q signal;
the power calculation unit is used for substituting the following formula to calculate the transmitting power of the radio frequency signal according to the intensity of the received signal;
RSSI＝10lgP
wherein, RSSI is the intensity of the received signal, n is the number of sampling points in a preset time period, k is the serial number of the current sampling point, I k Is the value, Q, of a first I-phase quadrature signal I1 in the digital baseband signal k Is the value of a second Q-phase orthogonal signal in the digital baseband signal, P is the transmission power, lg is the logarithm with the base number of 10The function sign.
Specifically, the method is used for detecting the downlink power on the 5GNR RRU, so as to meet the requirement of a mobile operator on the transmission power. The device adopts a Radio Frequency Integrated Circuit (RFIC) scheme to perform coupling acquisition on radio frequency signals, perform down-conversion and demodulation, perform analog-to-digital conversion on the signals after the signals are restored into baseband signals, and then calculate the digital signals to fulfill the aim of power detection.
A solution for power detection is provided for transmit power control for 5GNR RRU. The method employs an RFIC to reduce the complexity of the system. The method achieves the purpose of power detection by calculating the digital baseband signal.
The coupler 40 couples the tiny part of the transmitted Signal to the OBS, the OBS receiver demodulates and down-converts the RF Signal to an analog baseband Signal, the ADC in the DSP converts the analog Signal to a digital Signal, and then the DSP calculates the acquired digital Signal to obtain an rssi (received Signal Strength indication) received Signal Strength indication. The transmission power P is then calculated from the received signal strength.
The invention adopts the zero intermediate frequency architecture receiver 50OBS to realize power detection, the transmitting power detection circuit of the invention adopts the zero intermediate frequency architecture, integrates the local oscillator and the frequency mixer, has simpler circuit, more convenient debugging and smaller circuit area compared with the circuit of a discrete device, and can acquire baseband signals for sensing the distortion of transmitting signals. The invention uses complex frequency mixer in zero intermediate frequency structure, so that the emission power detection circuit does not need RF filtering, and simultaneously, the efficiency of baseband power can be optimized.
Referring to fig. 3, fig. 3 is a schematic flow chart of a method for detecting transmission power according to an embodiment of the present invention, including:
s301, controlling the coupler 40 to couple the rf signal amplified by the power amplifier 30 to obtain a coupled rf signal:
s302, controlling the zero intermediate frequency architecture receiver 50 to convert the coupled radio frequency signal into an analog baseband signal;
s303, controlling the baseband processor 10 to convert the analog baseband signal into a digital baseband signal, and calculating the transmit power of the acquired radio frequency signal according to the digital baseband signal.
In this embodiment, the processor in the wireless communication device loads instructions corresponding to processes of one or more application programs into the memory according to the above steps, and the processor runs the application programs stored in the memory, thereby implementing various functions.
Referring to fig. 4, in a specific implementation, each of the modules and/or units may be implemented as an independent entity, or may be implemented as one or multiple entities in any combination, and the specific implementation of each of the modules and/or units may refer to the foregoing circuit embodiment, and specific beneficial effects that can be achieved also refer to the beneficial effects in the foregoing circuit embodiment, which are not described herein again.
In addition, the wireless communication device provided by the embodiment of the invention can be a mobile terminal such as a smart phone, a tablet computer, a wireless router and the like. The wireless communication device includes a processor, a memory. The processor is electrically connected with the memory.
The processor is a control center of the wireless communication device, connects various parts of the whole wireless communication device by using various interfaces and lines, executes various functions of the wireless communication device and processes data by running or loading an application program stored in the memory and calling the data stored in the memory, thereby performing overall monitoring of the wireless communication device.
The wireless communication device may implement the functions in any embodiment of the transmission power detection circuit provided in the embodiment of the present invention, and therefore, the beneficial effects that any one of the transmission power detection circuits provided in the embodiment of the present invention can implement may be achieved, for details, see the foregoing embodiments, and are not described herein again.
As shown in fig. 4, fig. 4 is a specific block diagram of a wireless communication device provided in an embodiment of the present invention, which can be used to implement the transmission power detection circuit provided in the above embodiment. The wireless communication device 900 may be a mobile terminal such as a smart phone or a notebook computer.
The RF circuit 910 is used for receiving and transmitting electromagnetic waves, and interconverting the electromagnetic waves and electrical signals, so as to communicate with a communication network or other devices. RF circuit 910 may include various existing circuit elements for performing these functions, such as an antenna, a radio frequency transceiver, a digital signal processor, an encryption/decryption chip, a Subscriber Identity Module (SIM) card, memory, and so forth. The RF circuit 910 may communicate with various networks such as the internet, an intranet, a wireless network, or with other devices over a wireless network. The wireless network may comprise a cellular telephone network, a wireless local area network, or a metropolitan area network. The Wireless network may use various Communication standards, protocols, and technologies, including, but not limited to, Global System for Mobile Communication (GSM), Enhanced Data GSM Environment (EDGE), Wideband Code Division Multiple Access (WCDMA), Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Wireless Fidelity (Wi-Fi) (e.g., Institute of Electrical and Electronics Engineers (IEEE) standard IEEE802.11 a, IEEE802.11 b, IEEE802.11g, and/or IEEE802.11 n), Voice over Internet Protocol (VoIP), world wide mail Access (Microwave Access for micro), wimax-1, other suitable short message protocols, and any other suitable Protocol for instant messaging, and may even include those protocols that have not yet been developed.
the coupler is controlled to carry out coupling processing on the radio-frequency signal amplified by the power amplifier to obtain a coupled radio-frequency signal:
controlling a zero intermediate frequency architecture receiver to convert the coupled radio frequency signal into the analog baseband signal;
and controlling a baseband processor to convert the analog baseband signal into a digital baseband signal, and calculating the transmitting power of the acquired radio frequency signal according to the digital baseband signal.
The memory 920 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 920 can further include memory located remotely from the processor 980, which can be connected to the wireless communication device 900 over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input unit 930 may be used to receive input numeric or character information and generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function control. In particular, the input unit 930 may include a touch-sensitive surface 931 as well as other input devices 932. The touch-sensitive surface 931, also referred to as a touch screen or a touch pad, may collect touch operations by a user on or near the touch-sensitive surface 931 (e.g., operations by a user on or near the touch-sensitive surface 931 using a finger, a stylus, or any other suitable object or attachment) and drive the corresponding connecting device according to a predetermined program. Alternatively, the touch sensitive surface 931 may include both a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 980, and can receive and execute commands sent by the processor 980. In addition, the touch sensitive surface 931 may be implemented in various types, such as resistive, capacitive, infrared, and surface acoustic wave. The input unit 930 may also include other input devices 932 in addition to the touch-sensitive surface 931. In particular, other input devices 932 may include, but are not limited to, one or more of a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like.
The display unit 940 may be used to display information input by or provided to the user as well as various graphical user interfaces of the wireless communication device 900, which may be made up of graphics, text, icons, video, and any combination thereof. The Display unit 940 may include a Display panel 941, and optionally, the Display panel 941 may be configured in the form of an LCD (Liquid Crystal Display), an OLED (Organic Light-Emitting Diode), or the like. Further, the touch-sensitive surface 931 may overlay the display panel 941, and when a touch operation is detected on or near the touch-sensitive surface 931, the touch operation is transmitted to the processor 980 to determine the type of touch event, and the processor 980 then provides a corresponding visual output on the display panel 941 according to the type of touch event. Although the touch-sensitive surface 931 and the display panel 941 are shown as two separate components to implement input and output functions, in some embodiments, the touch-sensitive surface 931 and the display panel 941 may be integrated to implement input and output functions.
The wireless communication device 900 may also include at least one sensor 950, such as light sensors, motion sensors, and other sensors. Specifically, the light sensor may include an ambient light sensor that may adjust the brightness of the display panel 941 according to the brightness of ambient light, and a proximity sensor that may generate an interrupt when the folder is closed or closed. As one of the motion sensors, the gravity acceleration sensor can detect the magnitude of acceleration in each direction (generally, three axes), can detect the magnitude and direction of gravity when the mobile phone is stationary, and can be used for applications of recognizing the posture of the mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer and tapping), and the like; as for other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor that may be further configured to the wireless communication device 900, further description is omitted here.
The audio circuitry 960, speaker 961, microphone 962 may provide an audio interface between a user and the wireless communication device 900. The audio circuit 960 may transmit the electrical signal converted from the received audio data to the speaker 961, and convert the electrical signal into a sound signal for output by the speaker 961; on the other hand, the microphone 962 converts the collected sound signal into an electric signal, converts the electric signal into audio data after being received by the audio circuit 960, and outputs the audio data to the processor 980 for processing, and then transmits the audio data to another terminal via the RF circuit 910, or outputs the audio data to the memory 920 for further processing. The audio circuit 960 may also include an earbud jack to provide communication of a peripheral headset with the wireless communication device 900.
The wireless communication device 900, via a transport module 970 (e.g., a Wi-Fi module), may assist a user in receiving requests, sending messages, etc., which provides the user with wireless broadband internet access. Although the transmission module 970 is shown in the drawing, it is understood that it does not belong to the essential constitution of the wireless communication device 900 and can be omitted entirely within the scope not changing the essence of the invention as needed.
The processor 980 is a control center of the wireless communication device 900, connects various parts of the entire handset using various interfaces and lines, and performs various functions of the wireless communication device 900 and processes data by running or executing software programs and/or modules stored in the memory 920 and calling up data stored in the memory 920, thereby performing overall monitoring of the wireless communication device. Optionally, processor 980 may include one or more processing cores; in some embodiments, the processor 980 may integrate an application processor, which primarily handles operating systems, user interfaces, applications, etc., and a modem processor, which primarily handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 980.
The wireless communication device 900 also includes a power supply 990 (e.g., a battery) that provides power to the various components and, in some embodiments, may be logically coupled to the processor 980 via a power management system that provides for managing charging, discharging, and power consumption. Power supply 990 may also include any component of one or more dc or ac power sources, recharging systems, power failure detection circuits, power converters or inverters, power status indicators, and the like.
In specific implementation, the above modules may be implemented as independent entities, or may be combined arbitrarily to be implemented as the same or several entities, and specific implementation of the above modules may refer to the foregoing method embodiments, which are not described herein again.
It will be understood by those skilled in the art that all or part of the steps of the methods of the above embodiments may be performed by instructions or by associated hardware controlled by the instructions, which may be stored in a computer readable storage medium and loaded and executed by a processor. To this end, embodiments of the present invention provide a storage medium, in which a plurality of instructions are stored, and the instructions can be loaded by a processor to execute the steps of any embodiment of the transmission power detection circuit provided in embodiments of the present invention.
Sliding the original signal according to the peak window to obtain a plurality of maximum peak positions; the original signal consists of a plurality of continuous point data; the maximum peak position is a coordinate value of the maximum peak in the direction of the horizontal axis;
performing data amplification processing according to the maximum peak position to obtain data after amplification;
obtaining a plurality of maximum power value positions according to the data after amplification; the maximum power value position is a coordinate value of the maximum power value in the direction of the horizontal axis;
calculating according to the maximum power value position to obtain a corresponding cancellation pulse sequence label;
and processing according to the maximum peak position, the maximum power value position and the counteracting pulse sequence label to obtain a signal after peak clipping.
Wherein the storage medium may include: read Only Memory (ROM), Random Access Memory (RAM), magnetic or optical disks, and the like.
Since the instructions stored in the storage medium may execute the steps in any embodiment of the transmission power detection circuit provided in the embodiment of the present invention, the beneficial effects that any one of the transmission power detection circuits provided in the embodiment of the present invention can achieve may be achieved, for details, see the foregoing embodiments, and are not described herein again.
The cross-domain data sharing, apparatus, wireless communication device and storage medium provided by the embodiments of the present invention are described in detail above, and the principles and embodiments of the present invention are explained herein by applying specific examples, and the descriptions of the above embodiments are only used to help understanding the method and core ideas of the present invention; meanwhile, for those skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention. Moreover, it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention, and such modifications and adaptations are intended to be within the scope of the invention.
Claims (10)
1. A transmit power detection circuit, comprising:
a baseband processor;
the zero intermediate frequency architecture transmitter is connected with the baseband processor and is used for modulating and up-converting an analog baseband signal into a radio frequency signal;
the power amplifier is connected with the zero intermediate frequency architecture transmitter and used for amplifying the radio frequency signal so as to enable the transmission power of the radio frequency signal to reach a target power value;
the coupler is connected with the power amplifier and used for coupling the amplified radio-frequency signal to obtain a coupled radio-frequency signal:
a zero intermediate frequency architecture receiver connected with the coupler for converting the coupled radio frequency signal into the analog baseband signal;
the baseband processor is also connected with the zero intermediate frequency architecture receiver and is used for converting the analog baseband signal into a digital baseband signal and calculating the transmitting power of the acquired radio frequency signal according to the digital baseband signal.
2. The transmit power detection circuit of claim 1, wherein the baseband processor comprises: the digital-to-analog conversion module and the analog-to-digital conversion module;
the digital-to-analog conversion module is used for generating a corresponding analog baseband signal according to the baseband digital quantity;
the analog-to-digital conversion module is used for performing analog-to-digital conversion on the radio frequency signal to obtain a corresponding digital baseband signal.
3. The transmit power detection circuit of claim 2, wherein the baseband processor further comprises:
the comparison module is used for comparing the calculated transmitting power with a power threshold range; the power threshold range comprises a coarse adjustment range and a fine adjustment range;
and the processing module is used for adjusting the transmitting power of the zero intermediate frequency architecture transmitter to realize coarse adjustment if the transmitting power obtained by calculation is determined to be within the coarse adjustment range according to the comparison result, and adjusting the transmitting power of the baseband digital quantity to realize fine adjustment if the transmitting power obtained by calculation is determined to be within the fine adjustment range according to the comparison result.
4. The transmit power detection circuit of claim 2, wherein the zero intermediate frequency architecture transmitter comprises: a first I-phase mixer, a first Q-phase mixer, a first local oscillator, a summing amplifier and a preamplifier;
the first local oscillator is connected with the first I-phase frequency mixer and the first Q-phase frequency mixer, and is used for outputting a first local oscillation signal to the first I-phase frequency mixer and outputting a second local oscillation signal to the first Q-phase frequency mixer;
the first I-phase frequency mixer is connected with the digital-to-analog conversion module and the first local oscillator, and is used for receiving a first I-phase orthogonal signal in the analog baseband signal and performing up-conversion processing on the first I-phase orthogonal signal and the first local oscillator signal to obtain an I-phase up-conversion signal;
the first Q-phase frequency mixer is connected with the digital-to-analog conversion module and the first local oscillator, and is used for receiving a first Q-phase orthogonal signal in the analog baseband signal and performing up-conversion processing on the first Q-phase orthogonal signal and the second local oscillator signal to obtain a Q-phase up-conversion signal;
the summing amplifier is connected with the first I-phase mixer and the first Q-phase mixer and is used for summing the I-phase up-conversion signal and the Q-phase up-conversion signal to output the radio-frequency signal;
the preamplifier is connected with the summing amplifier and is used for amplifying the radio-frequency signals.
5. The transmit power detection circuit of claim 2, wherein the zero intermediate frequency architecture receiver comprises: the first I-phase mixer, the first Q-phase mixer, the first local oscillator and the low-noise power amplifier are connected;
the low noise power amplifier is connected with the coupler and used for receiving the coupled radio frequency signal;
the second local oscillator is connected with the second I-phase frequency mixer and the second Q-phase frequency mixer, and is configured to output a third local oscillation signal to the second I-phase frequency mixer and output a fourth local oscillation signal to the second Q-phase frequency mixer;
the second I-phase mixer is connected to the analog-to-digital conversion module and the second local oscillator, and configured to perform down-conversion processing on the third local oscillator signal and a second I-phase orthogonal signal in the coupled radio frequency signal to obtain an I-phase down-conversion signal, and send the I-phase down-conversion signal to the analog-to-digital conversion module;
the second Q-phase frequency mixer is connected to the analog-to-digital conversion module and the second local oscillator, and configured to perform down-conversion processing on the fourth local oscillator signal and a second Q-phase orthogonal signal in the coupled radio frequency signal to obtain a Q-phase down-conversion signal, and send the I-phase down-conversion signal to the analog-to-digital conversion module.
6. The transmit power detection circuit of claim 5,
and the analog-to-digital conversion module is used for performing analog-to-digital conversion on a radio frequency signal consisting of the I-phase down-conversion signal and the Q-phase down-conversion signal to obtain a corresponding digital baseband signal.
7. The transmit power detection circuit of any of claims 1-6, wherein the baseband processor further comprises:
and the calculation module is used for calculating to obtain the intensity of the received signal according to the digital baseband signal and carrying out inverse operation calculation according to the intensity of the received signal to obtain the transmitting power.
8. The transmit power detection circuit of claim 7, wherein the calculation module comprises:
the signal calculation unit is used for substituting the signal data of the digital baseband signal into the following formula to calculate the received signal strength of the radio frequency signal; the digital baseband signal is characterized according to the form of the I/Q signal;
the power calculation unit is used for substituting the following formula to calculate the transmitting power of the radio frequency signal according to the intensity of the received signal;
RSSI＝10lgP
wherein, RSSI is the intensity of the received signal, n is the number of sampling points in a preset time period, k is the serial number of the current sampling point, I k Is the value, Q, of the first I-phase quadrature signal in the digital baseband signal k Is the value of the second Q-phase quadrature signal in the digital baseband signal, P is the transmit power, lg is a logarithmic function with a base number of 10And (4) a symbol.
9. A transmission power detection method applied to the transmission power detection circuit according to any one of claims 1 to 8, comprising the steps of:
the coupler is controlled to carry out coupling processing on the radio-frequency signal amplified by the power amplifier to obtain a coupled radio-frequency signal:
controlling a zero intermediate frequency architecture receiver to convert the coupled radio frequency signal into an analog baseband signal;
and controlling a baseband processor to convert the analog baseband signal into a digital baseband signal, and calculating the transmitting power of the acquired radio frequency signal according to the digital baseband signal.
10. A wireless communication device comprising the transmission power detection circuit of any one of claims 1 to 8.
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