WO2021120709A1

WO2021120709A1 - Time delay calibration method, wireless radio frequency device and computer readable storage medium

Info

Publication number: WO2021120709A1
Application number: PCT/CN2020/113943
Authority: WO
Inventors: 胡立娟; 李俊强; 刘鑫
Original assignee: 紫光展讯通信(惠州)有限公司
Priority date: 2019-12-16
Filing date: 2020-09-08
Publication date: 2021-06-24
Also published as: CN111064478A; CN111064478B

Abstract

A time delay calibration method, a wireless radio frequency device and a computer readable storage medium. The method comprises: receiving an input signal; performing time delay adjustment on an envelope of the input signal and the input signal to obtain a change relationship of a target parameter value of an intermodulation signal of a channel adjacent to the input signal and a time delay deviation value, the time delay deviation value being a time delay of the envelope of the input signal with respect to the input signal; and determining a calibration time delay value based on the change relationship of the target parameter value of the intermodulation signal of the channel adjacent to the input signal and the time delay deviation value, to perform time delay calibration on a signal to be sent. By applying the scheme, the transportability of the method for carrying out time delay calibration on the ET can be improved.

Description

Time delay calibration method, radio frequency equipment and computer readable storage medium

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office, the application number is 201911296067.3, and the invention title is "Time Delay Calibration Method, Radio Frequency Equipment, and Computer-readable Storage Medium" on December 16, 2019, and its entire contents Incorporated in this application by reference.

Technical field

The present invention relates to the field of communication technology, in particular to a time delay calibration method, radio frequency equipment and computer-readable storage medium.

Background technique

In the radio frequency equipment, a power amplifier (PA) is usually provided to amplify the input signal to improve the transmission performance of the radio frequency equipment. The working efficiency of the PA is related to its power supply voltage.

In practical applications, either a fixed voltage can be provided for the PA as the power supply voltage, or a variable voltage can be provided for the PA as the power supply voltage. Compared with a fixed supply voltage, a variable supply voltage can more effectively improve the working efficiency of the PA.

At present, the variable power supply voltage is provided for the PA mainly through the way of envelope tracking (Envolope Tracking, ET). Specifically, the instantaneous power supply voltage of the PA can be calculated according to the instantaneous signal input by the PA. But a good time match between the instantaneous power supply voltage and the input instantaneous signal can ensure the performance of the entire system. If there is a time deviation between the instantaneous power supply voltage and the input instantaneous signal, not only the working efficiency of the PA will be greatly reduced, but also the performance of the PA output signal will be deteriorated, and some undesired "signals" will be generated outside the bandwidth.

The time delay calibration of ET is to make the instantaneous power supply voltage better fit the input instantaneous signal, while improving the working efficiency of the PA, while ensuring the performance of the output signal of the power amplifier.

However, the existing methods for performing delay calibration on ET are almost completely implemented by hardware circuits. Since different hardware circuits and different radio frequency devices have different delays, the portability of the above methods is poor.

Summary of the invention

The problem to be solved by the present invention is how to improve the portability of the delay calibration method for ET.

In order to solve the above-mentioned problem, the embodiment of the present invention provides a delay calibration method, the method is suitable for wireless radio frequency equipment, the radio frequency equipment includes a transmission path, the transmission path includes a power amplifier; the method includes: receiving Input signal; time delay adjustment is performed on the envelope of the input signal and the input signal itself to obtain the relationship between the target parameter value of the intermodulation signal of the adjacent channel of the input signal and the time delay deviation value; the time The delay deviation value is the time delay of the envelope of the input signal relative to the input signal; the calibration delay value is determined based on the relationship between the target parameter value of the intermodulation signal of the channel adjacent to the input signal and the time delay deviation value , To perform delay calibration on the signal to be sent.

Optionally, the time delay adjustment is performed on the envelope of the input signal and the input signal itself to obtain the change relationship of the time delay deviation value of the target parameter value of the intermodulation signal of the adjacent channel of the input signal, It includes: receiving a plurality of first delay configuration values for adjusting the time delay of the envelope of the input signal, and a plurality of second delay configuration values for adjusting the delay of the input signal itself; based on each of the first time delay configuration values; Delay configuration values, respectively adjust the envelope of the input signal to obtain first power supply voltages corresponding to the first delay configuration values, respectively, as the power supply voltages of the power amplifier; based on each of the second time delays Configuration values, respectively adjusting the time delay of the input signal itself, and respectively inputting to the transmission path of the wireless radio frequency device; respectively obtaining the output signal of the power amplifier when the power amplifier is powered by each of the first supply voltages; respectively based on The output signal of the power amplifier obtains the corresponding target parameter value of the intermodulation signal of the channel adjacent to the input signal; based on the target parameter value of the intermodulation signal of each channel adjacent to the input signal, obtains The relationship between the target parameter value of the intermodulation signal of the channel adjacent to the input signal and the time delay deviation value.

Optionally, the obtaining the target parameter value of the corresponding intermodulation signal of the channel adjacent to the input signal based on the output signal of the power amplifier respectively includes: performing down-conversion processing on the output signal of the power amplifier ; Perform analog-to-digital conversion processing on the signal after the down-conversion processing; perform fast Fourier transform on the signal after the analog-to-digital conversion processing; from the frequency domain signal obtained by the fast Fourier transform, obtain and The intermodulation signal of the adjacent channel of the input signal; calculating the target parameter value of the intermodulation signal of the adjacent channel of the input signal at the intermodulation point.

Optionally, the change relationship between the target parameter value of the intermodulation signal of the adjacent channel of the input signal and the time delay deviation value includes: the time delay deviation of the target parameter value of the intermodulation signal of the adjacent channel on the input signal The relationship between the change of the value and the relationship between the target parameter value of the intermodulation signal of the adjacent channel under the input signal and the deviation value with time.

Optionally, the target parameter value is the sum of the power values of the intermodulation signals on the same adjacent channel as the input signal at all the intersection points, or is the sum of the power values of the intermodulation signals on the same adjacent channel as the input signal at all the intersections. The square sum of the amplitude value of the adjustment point.

Optionally, the determining the calibration delay value based on the change relationship between the target parameter value of the intermodulation signal of the adjacent channel of the input signal and the time delay deviation value includes: selecting the intermodulation of the adjacent channel on the input signal The target parameter value of the signal, whichever is greater than the target parameter value of the intermodulation signal of the adjacent channel under the input signal, is used as the target parameter value of the intermodulation signal corresponding to the corresponding delay deviation value, and the intermodulation signal is obtained. The change curve of the target parameter value of the intermodulation signal with time delay deviation value; in the change curve of the target parameter value of the intermodulation signal with time delay deviation value, the delay deviation value corresponding to the minimum target parameter value is used as the calibration time Extension value.

Optionally, after obtaining the change curve of the target parameter value of the intermodulation signal with the time delay deviation value, the method further includes: calculating the target parameter value of the intermodulation signal in the change curve of the time delay deviation value, the adjacent time delay The difference between the target parameter values corresponding to the deviation values obtains the corresponding difference curve; when the direction of the difference curve changes, the time delay calibration process is ended.

The embodiment of the present invention also provides a wireless radio frequency equipment, the radio frequency equipment includes a transmission path, the transmission path includes a power amplifier; the wireless radio frequency equipment further includes: a receiving unit adapted to receive input signals; target parameter values The calculation unit is adapted to adjust the time delay of the envelope of the input signal and the input signal itself to obtain the relationship between the target parameter value of the intermodulation signal of the adjacent channel of the input signal and the time delay deviation value; The time delay deviation value is the time delay of the envelope of the input signal relative to the time delay of the input signal; the time delay calibration unit is adapted to be based on the time delay deviation value based on the target parameter value of the intermodulation signal of the channel adjacent to the input signal To determine the calibration delay value to perform delay calibration on the signal to be sent.

Optionally, the target parameter value calculation unit includes: a power supply voltage calculation sub-unit adapted to receive a plurality of first delay configuration values for delay adjustment of the envelope of the input signal, and based on each of the first delay configuration values. Delay configuration values, respectively adjust the envelope of the input signal to obtain the first power supply voltages corresponding to the first delay configuration values, respectively, as the power supply voltages of the power amplifier; the delay adjustment subunit, suitable After receiving a plurality of second delay configuration values that adjust the delay of the input signal itself, and based on each of the second delay configuration values, respectively adjust the delay of the input signal itself, and input them to the The transmission path of the wireless radio frequency device; the target parameter value calculation subunit is adapted to obtain the output signal of the power amplifier when powered by each of the first supply voltages, and obtain the corresponding output signal based on the output signal of the power amplifier. The target parameter value of the intermodulation signal of the channel adjacent to the input signal; the change relationship determination subunit is adapted to obtain the target parameter value of the intermodulation signal of each channel adjacent to the input signal and The relationship between the target parameter value of the intermodulation signal of the adjacent channel of the input signal and the time delay deviation value.

Optionally, the target parameter value calculation subunit includes: a down-conversion module, adapted to perform down-conversion processing on the output signal of the power amplifier; and an analog-to-digital conversion module, adapted to perform down-conversion processing on the signal after the down-conversion processing. Perform analog-to-digital conversion processing; Fourier transform module, adapted to perform fast Fourier transform on the signal after the analog-to-digital conversion processing; calculation module, adapted to obtain the frequency domain signal from the fast Fourier transform To obtain the intermodulation signal of the channel adjacent to the input signal, and calculate the target parameter value of the intermodulation signal of the channel adjacent to the input signal at the intermodulation point.

Optionally, the change relationship determination subunit, the obtained change relationship includes: the change relationship of the target parameter value of the intermodulation signal of the adjacent channel on the input signal with time delay deviation value, and the change relationship of the next channel on the input signal The relationship between the target parameter value of the intermodulation signal and the deviation value with time.

Optionally, the target parameter value calculated by the calculation module is the sum of the power values of the intermodulation signals on the same adjacent channel as the input signal at all the intersection points, or is the intermodulation on the same adjacent channel as the input signal The sum of the squares of the amplitude values of the signal at all intersection points.

Optionally, the time delay calibration unit includes: a first selection subunit adapted to select the target parameter value of the intermodulation signal of the adjacent channel on the input signal, and the target parameter value of the intermodulation signal of the adjacent channel below the input signal The larger one of the target parameter values of is used as the target parameter value of the intermodulation signal corresponding to the corresponding delay deviation value, and the target parameter value of the intermodulation signal is obtained as the variation curve of the deviation value with time delay; the second selector The unit is adapted to use the time delay deviation value corresponding to the minimum target parameter value of the signal in the variation curve of the time delay deviation value of the target parameter value of the intermodulation signal as the calibration delay value.

Optionally, the radio frequency device further includes: a difference curve obtaining unit, adapted to calculate the target parameter value of the intermodulation signal after obtaining the change curve of the target parameter value of the intermodulation signal with time delay deviation value In the variation curve of the time delay deviation value, the difference between the target parameter values corresponding to the adjacent time delay deviation values to obtain the corresponding difference curve; the calibration control unit is suitable for when the direction of the difference curve changes To end the time delay calibration process.

Optionally, the power supply voltage calculation subunit includes: an envelope calculation module adapted to calculate the envelope of the input signal; and a delay adjustment module adapted to receive multiple delay adjustments to the envelope of the input signal The first time delay configuration value, and based on each of the first time delay configuration values, the envelope of the input signal is adjusted respectively; the power supply voltage calculation module is adapted to obtain the adjusted envelope of the input signal based on the The first power supply voltage control signal corresponding to the first delay configuration value; an analog-to-digital conversion module adapted to perform analog-to-digital conversion on the obtained first power supply voltage control signal corresponding to the first delay configuration value, Obtain the corresponding analog voltage control signal; the envelope tracking module is adapted to obtain the corresponding first supply voltage based on the obtained analog voltage control signal, respectively as the supply voltage of the power amplifier to supply power to the power amplifier.

The embodiment of the present invention also provides a computer-readable storage medium on which computer instructions are stored, and when the computer instructions are executed by a processor, the steps of any one of the foregoing methods are executed.

An embodiment of the present invention also provides a wireless radio frequency device, including a memory and a processor, the memory stores computer instructions that can run on the processor, and the processor executes any of the foregoing when the computer instructions are executed. One of the steps of the described method.

Compared with the prior art, the technical solution of the embodiment of the present invention has the following advantages:

Using the above solution, after receiving the input signal, by adjusting the envelope of the input signal and the time delay of the input signal itself, the target parameter value of the intermodulation signal of the channel adjacent to the input signal is obtained with time delay deviation The change relationship of the value can further be based on the change relationship of the time delay deviation value of the target parameter value of the intermodulation signal of the channel adjacent to the input signal to determine the calibration delay value. The above-mentioned scheme is less dependent on the hardware circuit, so the portability is stronger.

Further, by performing fast Fourier transform on the signal processed by the analog-to-digital conversion, and from the frequency domain signal obtained by the fast Fourier transform, the intermodulation signal of the channel adjacent to the input signal can be obtained, and then the calculated value can be calculated. For the target parameter value of the intermodulation signal of the channel adjacent to the input signal at the intermodulation point, the data processed by the calibration can meet the required length of the fast Fourier transform, so the time required for calibration is shorter, and the fast Fourier transform After the inner leaf is transformed, it does not need to occupy a large storage space.

Description of the drawings

FIG. 1 is a flowchart of a method for delay calibration in an embodiment of the present invention;

2 is a flow chart of a method for determining the relationship between the target parameter value of the intermodulation signal of the adjacent channel of the input signal and the variation of the delay deviation value with time in an embodiment of the present invention;

3 is a schematic diagram of a frequency domain signal corresponding to an input signal in an embodiment of the present invention;

4 is a schematic diagram of the variation curve of the target parameter value of the intermodulation signal of the adjacent channel of the input signal with the time delay deviation value in the embodiment of the present invention;

5 is a schematic diagram of the variation curve of the target parameter value of an intermodulation signal with time delay deviation value in an embodiment of the present invention;

Fig. 6 is a schematic diagram of a difference curve in an embodiment of the present invention;

Fig. 7 is a schematic structural diagram of a wireless radio frequency device in an embodiment of the present invention.

Detailed ways

At present, the method of delay calibration for ET almost completely relies on hardware circuit implementation. Since different hardware circuits and different radio frequency devices have different delays, the portability of the above methods is poor.

To this end, the embodiment of the present invention provides a delay calibration method. In the method, the envelope of the input signal and the input signal itself are adjusted to obtain the intermodulation signal of the channel adjacent to the input signal. The change relationship of the target parameter value with time delay deviation value, and then the calibration delay value can be determined based on the change relationship of the target parameter value with the time delay deviation value of the intermodulation signal of the channel adjacent to the input signal. The above-mentioned scheme is less dependent on the hardware circuit, so the portability is stronger.

In order to make the above objectives, features and advantages of the present invention more obvious and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

1, an embodiment of the present invention provides a delay calibration method, the method is applicable to a radio frequency device, the radio frequency device includes a transmission path, and the transmission path includes a power amplifier.

Specifically, the method may include the following steps:

Step 11. Receive the input signal.

In a specific implementation, the input signal may be generated by a training sequence generator. For example, the input signal may be a two-tone signal, a four-tone signal or a multi-tone signal produced by the training sequence generator. The input signal may also be a baseband signal used for time delay calibration, and the baseband signal may be a 3G, 4G, or 5G service signal.

In a specific implementation, the input signal may be a dual tone signal. In order to improve the accuracy of the time delay calibration, the input signal may be a multi-tone signal.

Step 12: Perform time delay adjustment on the envelope of the input signal and the input signal itself to obtain the relationship between the target parameter value of the intermodulation signal of the adjacent channel of the input signal and the time delay deviation value; The delay deviation value is the time delay of the envelope of the input signal relative to the input signal.

In specific implementation, the Adjacent Channel Leakage Ratio (ACLR) is an index used to measure the transmission of radio frequency energy in addition to the specified transmission channel, and is generated by the PA.

Due to the existence of ACLR, after the input signal is amplified by PA, energy leakage will occur in the adjacent channel of the input signal. By adjusting the envelope of the input signal and the time delay of the input signal itself, the input signal can be compared with the input signal. The change relationship of the target parameter value of the intermodulation signal of the adjacent channel of the signal with time delay deviation value can know the change trend of the time deviation between the envelope of the input signal and the input signal.

Step 13: Determine a calibration delay value based on the change relationship of the target parameter value of the intermodulation signal of the channel adjacent to the input signal with the time delay deviation value, so as to perform the delay calibration of the signal to be sent.

Since the target parameter value of the intermodulation signal of the channel adjacent to the input signal represents the energy leakage generated in the adjacent channel after the input signal is amplified by the PA, when the input signal is amplified by the PA, it is in the phase When the energy leakage generated by the adjacent channel is the least, the corresponding delay deviation value is the calibration delay value. When a user uses a radio frequency device to send a signal, using the calibration delay value to calibrate the signal to be sent can reduce the delay between the envelope of the signal to be sent and the signal itself, and improve the performance of the PA.

Fig. 2 is a flowchart of a method for determining the relationship between the target parameter value of the intermodulation signal of the adjacent channel of the input signal and the deviation value with time in an embodiment of the present invention. Referring to Figure 2, the method may include the following steps:

Step 21: Receive a plurality of first delay configuration values for adjusting the time delay of the envelope of the input signal, and a plurality of second delay configuration values for adjusting the time delay of the input signal itself.

In a specific implementation, the first delay configuration value and the second delay configuration value can be determined according to the delay of the hardware circuit in the radio frequency device, for example, the delay of the digital circuit and the analog circuit in the radio frequency device. Value range. Assuming that the value range of the first delay configuration value and the second delay configuration value is [minus_delay, positive_delay], the initial value of the first delay configuration value and the second delay configuration value can be set to minus_delay.

In an embodiment of the present invention, the first time delay configuration value can be adjusted subsequently according to a certain step size, but the second time delay configuration value is kept unchanged, so that the envelope of the input signal and the input signal itself The delay gradually matches. For example, when the frequency band of the PA output signal does not change, the second delay configuration value can be kept unchanged, and only the first delay configuration value can be adjusted.

In other embodiments, the first delay configuration value and the second delay configuration value may also be changed at the same time, so that the envelope of the input signal gradually matches the delay of the input signal itself.

Step 22: Based on each of the first delay configuration values, respectively adjust the envelope of the input signal to obtain first supply voltages corresponding to the first delay configuration values, which are used as power supplies for the power amplifiers. Voltage.

In a specific implementation, based on any first delay configuration value, the envelope of the input signal is adjusted, and then the input signal after the delay adjustment is obtained through the correspondence table between the envelope and the voltage (ie, the PVT table) The digital voltage control signal corresponding to the envelope of. Then, the digital voltage control signal can be converted from digital to analog to obtain the corresponding analog voltage control signal. After obtaining the instantaneous power supply voltage of the input signal based on the analog voltage control signal, the instantaneous power supply voltage of the input signal is provided to the PA as the power supply voltage.

Different first time delay configuration values can obtain instantaneous power supply voltages with different time deviations of the envelope of the input signal.

Step 23: Adjust the delay of the input signal itself based on each of the second delay configuration values, and respectively input them into the transmission path of the radio frequency device.

In a specific implementation, when the second delay configuration value input is different each time, the delay of the input signal itself can be adjusted based on the different second delay configuration values to obtain the corresponding multiple delay adjustments. Input signal. When the second delay configuration value input each time is the same, for the same input signal, the delay of the input signal itself can be adjusted only once, and accordingly, there is only one input signal after the delay adjustment.

After the input signal after the delay adjustment is input to the transmission path of the radio frequency device, usually, the input signal after the delay adjustment is first processed by analog-to-digital conversion to obtain the corresponding analog signal, and then up-converted After processing, it is sent to the PA for power amplification.

Step 24: Obtain output signals of the power amplifiers when they are powered by the first supply voltages.

Assuming that the first delay configuration value is N, and N is a positive integer, then N different instantaneous power supply voltages will be obtained based on the first delay configuration value. When the PA is powered by the N instantaneous power supply voltages, the energy leakage of the adjacent channels of the input signal is usually different, so the output signal of the PA when powered by each of the first power supply voltages can be obtained separately, and the output signal of the PA Signal to obtain the relationship between the envelope of the input signal and the time delay change between the input signal itself.

Step 25: Obtain corresponding target parameter values of the intermodulation signal of the channel adjacent to the input signal based on the output signal of the power amplifier.

As described above, for each input signal, different first delay configuration values and second delay configuration values can be configured, so that there are multiple output signals corresponding to each input signal.

In a specific implementation, based on the output signal of the PA, various methods can be used to obtain the corresponding target parameter value of the intermodulation signal of the channel adjacent to the input signal. Wherein, the adjacent channel of the input signal includes the upper adjacent channel and the lower adjacent channel of the input signal, and the intermodulation signal of the channel adjacent to the input signal includes the intermodulation signal of the upper adjacent channel of the input signal and all the adjacent channels. The intermodulation signal of the adjacent channel under the input signal.

Correspondingly, the relationship between the target parameter value of the intermodulation signal of the adjacent channel of the input signal and the time delay deviation value change relationship includes: the change of the target parameter value of the intermodulation signal of the adjacent channel on the input signal with time delay deviation value Relationship, and the relationship between the target parameter value of the intermodulation signal of the adjacent channel under the input signal and the variation relationship with the time delay deviation value.

In an embodiment of the present invention, the output signal of the PA may be down-converted first, and then the down-converted signal may be subjected to analog-to-digital conversion processing. Then, the fast Fourier transform is performed on the signal after the analog-to-digital conversion process, and then the intermodulation signal of the channel adjacent to the input signal can be obtained from the frequency domain signal obtained by the fast Fourier transform, Therefore, the target parameter value of the intermodulation signal of the channel adjacent to the input signal at the intermodulation point can be calculated.

In practical applications, a down-converter can be used to down-convert the output signal of the PA. The down-converter and the up-converter in the transmission path of the radio frequency device are connected through a local oscillator (LO), so that the signal input from the up-converter to the PA is consistent with the output signal of the down-converter Channel.

The signal output by the PA is an analog signal. After the analog-to-digital conversion process, the corresponding digital signal is obtained, and after the fast Fourier transform, the corresponding frequency domain signal is obtained. From the frequency domain signal obtained by the fast Fourier transform, the intermodulation signal of the channel adjacent to the input signal is obtained. The target parameter value of the intermodulation signal at the intermodulation point can indicate that the input signal is in the adjacent channel Of energy leakage.

Taking the input signal as a dual-tone signal as an example, the output signal corresponding to the input signal is shown in FIG. 3. In Fig. 3, the bandwidth range of the transmission channel of the wireless radio frequency device, the bandwidth range of the adjacent channel on the input signal, and the bandwidth range of the adjacent channel under the input signal are respectively shown. Among them, the intermodulation signal obtained after the input signal is amplified by PA is a third-order intermodulation signal, that is, the frequency of the third-order intermodulation signal at the intersection point of the upper adjacent channel is 3f, and the frequency at the intersection point of the lower adjacent channel The frequency is -3f.

In a specific implementation, the target parameter value may be the power value of the intersection point. In order to reduce the amount of calculation, the target parameter value may also be the square of the amplitude value of the intersection point. It is understandable that both the power value of the intersection point or the square of the amplitude value of the intersection point can characterize the energy leakage of the input signal in the adjacent channel.

In an embodiment of the present invention, the target parameter value is the sum of the power values of the intermodulation signal on the same adjacent channel as the input signal at all the intersection points, or is the intersection of the same adjacent channel as the input signal. The sum of the squares of the amplitude values of the modulation signal at all intersection points.

In specific implementation, for the same input signal, there may be only one or more intermodulation points corresponding to the intermodulation signal of the upper adjacent channel. The intermodulation point corresponding to the intermodulation signal of the lower adjacent channel may also only exist. There is one or more than one.

For example, the intermodulation point corresponding to the intermodulation signal of the upper adjacent channel of the input signal may only include one third-order intermodulation point, or it may also include one fifth-order or higher intermodulation point at the same time.

When the intermodulation point corresponding to the intermodulation signal of the upper adjacent channel contains only one third-order intermodulation point, the target parameter value of the upper adjacent channel is: the power value at the third-order intermodulation point. When the input signal corresponding to the intermodulation signal of the upper adjacent channel includes one third-order intermodulation point and one fifth-order intermodulation point at the same time, the target parameter value of the upper adjacent channel is: the third-order intermodulation The sum of the power value at the point, and the power value at the 5th order intermodulation point.

Step 26: Based on the target parameter value of the intermodulation signal of each channel adjacent to the input signal, obtain the change relationship of the target parameter value of the intermodulation signal of the channel adjacent to the input signal with time delay deviation value.

In a specific implementation, a curve of the target parameter value with time delay deviation value may be used to characterize the change relationship of the target parameter value with the time delay deviation value of the target parameter value of the intermodulation signal of the channel adjacent to the input signal. Of course, other methods can also be used to characterize the relationship between the target parameter value of the intermodulation signal of the adjacent channel of the input signal and the deviation value with time.

FIG. 4 is a schematic diagram of the variation curve of the target parameter value of the intermodulation signal of the channel adjacent to the input signal with the time delay deviation value. Among them, the horizontal axis represents the delay deviation value, and the vertical axis represents the target parameter value. Curve 41 represents the change curve of the target parameter value of the adjacent channel intermodulation signal on the input signal with time delay deviation value, and curve 42 represents the change curve of the target parameter value of the adjacent channel intermodulation signal on the input signal with time delay deviation value,

In an embodiment of the present invention, after obtaining the relationship between the target parameter value of the intermodulation signal of the channel adjacent to the input signal and the time delay deviation value, various methods may be used to determine the calibration delay value.

In an embodiment of the present invention, the target parameter value of the intermodulation signal of the adjacent channel on the input signal may be selected first, whichever is greater than the target parameter value of the intermodulation signal of the adjacent channel below the input signal, As the target parameter value of the intermodulation signal corresponding to the corresponding delay deviation value, the change curve of the target parameter value of the intermodulation signal with time delay deviation value is obtained, and then the target parameter value of the intermodulation signal is delayed with time deviation In the value change curve, the delay deviation value corresponding to the minimum target parameter value is used as the calibration delay value, which can enable the radio frequency device to quickly search for the calibration delay value and improve the calibration efficiency.

Specifically, in conjunction with Figure 4, in obtaining the target parameter value of the upper and lower adjacent channel intermodulation signals of the input signal, the variation curve of the time delay deviation value is obtained. For the same delay deviation value, the upper and lower adjacent channel intermodulation signals of the input signal are selected. The larger of the target parameter values is used as the target parameter value corresponding to the delay deviation value, and thus the change curve 51 of the target parameter value of the intermodulation signal shown in FIG. 5 with time delay deviation value can be obtained.

Among them, in FIG. 5, the horizontal axis represents the delay deviation value, and the vertical axis represents the target parameter value. The point where the target parameter value is the smallest is point A. Since the point A is that the intermodulation signal corresponding to the input signal has the least energy leakage in the adjacent channel, the delay deviation value corresponding to the point A is the calibration delay value. Point A is the intersection of curve 41 and curve 42 in FIG. 4.

In an embodiment of the present invention, after obtaining the variation curve of the target parameter value of the intermodulation signal with time delay deviation value, in order to further save the time of delay calibration and improve the calibration efficiency, the calculation of the intermodulation signal can be calculated. In the change curve of the target parameter value with time delay deviation value, the difference between the target parameter values corresponding to the adjacent time delay deviation values is obtained, and the corresponding difference curve is obtained. When the direction of the difference curve changes, the process is ended. Describe the delay calibration process.

In specific implementation, in the process of obtaining the change curve of the target parameter value of the intermodulation signal with time delay deviation value, the corresponding difference curve can be obtained synchronously. Once the positive and negative directions of the difference curve change, the time delay calibration process is ended, thereby enabling the radio frequency device to end the time delay calibration process ahead of time by itself, further shortening the time delay calibration time.

With reference to FIG. 5, in the process of obtaining the change curve 51 of the target parameter value of the intermodulation signal shown in FIG. 5 with the time delay deviation value, the difference curve shown in FIG. 6 can be obtained synchronously. As shown in Figure 6, when the time deviation scans to 1.02ns, the envelope of the input signal and the calibration delay value that needs to be configured between the input signal can actually be obtained, so the following 6 calibration processes can be completely omitted.

It can be seen from the above content that the delay calibration method in the embodiment of the present invention has less dependence on hardware circuits, higher portability, and wider application range.

In order to enable those skilled in the art to better understand and implement the present invention, the device and computer-readable storage medium corresponding to the above method will be described in detail below.

Referring to FIG. 7, an embodiment of the present invention provides a radio frequency device 70. The radio frequency device 70 may include a receiving unit 71, a target parameter value calculation unit, and a delay calibration unit 73. In addition, the wireless radio frequency device 70 also has a transmission path, and the transmission path may include a mode converter 74, an up-converter 75, and a power amplifier 77. among them:

The receiving unit 71 is adapted to receive input signals;

The target parameter value calculation unit is adapted to adjust the time delay of the envelope of the input signal and the input signal itself to obtain the time delay deviation value of the target parameter value of the intermodulation signal of the channel adjacent to the input signal The change relationship of the time delay deviation value is the time delay of the envelope of the input signal relative to the input signal;

The delay calibration unit 73 is adapted to determine the calibration delay value based on the change relationship between the target parameter value of the intermodulation signal of the channel adjacent to the input signal and the delay deviation value, so as to perform the delay calibration on the signal to be sent .

In an embodiment of the present invention, the target parameter value calculation unit may include: a power supply voltage calculation subunit 721, a time delay adjustment subunit 722, a target parameter value calculation subunit 723, and a change relationship determination subunit 724. among them:

The power supply voltage calculation sub-unit 721 is adapted to receive a plurality of first delay configuration values for adjusting the envelope of the input signal, and adjust the input signal respectively based on each of the first delay configuration values To obtain the first power supply voltage corresponding to the first time delay configuration value, respectively, as the power supply voltage of the power amplifier;

The delay adjustment subunit 722 is adapted to receive a plurality of second delay configuration values for adjusting the delay of the input signal itself, and adjust the input signal itself based on each of the second delay configuration values. , And respectively input to the transmission path of the wireless radio frequency device;

The target parameter value calculation sub-unit 723 is adapted to obtain output signals of the power amplifiers when powered by the first supply voltages, and obtain corresponding output signals from the power amplifiers based on the output signals of the power amplifiers. The target parameter value of the intermodulation signal of the adjacent channel of the signal;

The change relationship determination subunit 724 is adapted to obtain the target parameter value of the intermodulation signal of the channel adjacent to the input signal at any time based on the target parameter value of the intermodulation signal of each channel adjacent to the input signal. The relationship between the delay deviation value.

In specific implementation, the delay-adjusted input signal output by the delay adjustment subunit 722 is first processed by the analog-to-digital converter 74 to obtain the corresponding digital signal, and then processed by the up-converter 75 and sent to the PA 77 for power amplification.

In an embodiment of the present invention, the target parameter value calculation subunit 723 may include: a down-conversion module 7231, an analog-to-digital conversion module 7232, a Fourier transform module 7233, and a calculation module 7234. among them:

The down-conversion module 7231 is adapted to perform down-conversion processing on the output signal of the power amplifier;

The analog-to-digital conversion module 7232 is adapted to perform analog-to-digital conversion processing on the down-converted signal;

The Fourier transform module 7233 is adapted to perform fast Fourier transform on the signal processed by the analog-to-digital conversion;

The calculation module 7234 is adapted to obtain the intermodulation signal of the channel adjacent to the input signal from the frequency domain signal obtained by the fast Fourier transform, and to calculate the frequency domain signal of the channel adjacent to the input signal. The target parameter value of the intermodulation signal at the intermodulation point.

In a specific implementation, the down-conversion module 7231 and the up-converter 75 are connected through a local oscillator (LO) 76. The down-conversion module 7231 first performs down-conversion processing on the output signal of the PA 77, and then the analog-to-digital conversion module 7232 performs analog-to-digital conversion processing on the signal after the down-conversion processing. Then, the Fourier transform module 7233 performs fast Fourier transform on the signal after the analog-to-digital conversion process, and then the calculation module 7234 can obtain the signal from the frequency domain obtained by the fast Fourier transform. The intermodulation signal of the adjacent channel of the input signal is input, so that the target parameter value of the intermodulation signal of the adjacent channel of the input signal at the intersection point can be calculated.

In an embodiment of the present invention, the change relationship determining subunit 724, the obtained change relationship includes:

The change relationship of the target parameter value of the intermodulation signal of the adjacent channel on the input signal with the time delay deviation value, and the change relationship of the target parameter value of the intermodulation signal of the adjacent channel below the input signal with the time delay deviation value.

In an embodiment of the present invention, the target parameter value calculated by the calculation module 7234 is the sum of the power values of the intermodulation signal at all the intermodulation points of the same adjacent channel as the input signal, or is the sum of the power values of the intermodulation signal and the input signal. The sum of the squares of the amplitude values of the intermodulation signals of the same adjacent channel at all intermodulation points.

In an embodiment of the present invention, the delay calibration unit 73 may include: a first selection subunit (not shown) and a second selection subunit (not shown). among them:

The first selection subunit is adapted to select the target parameter value of the intermodulation signal of the adjacent channel on the input signal, and the larger of the target parameter value of the intermodulation signal of the adjacent channel below the input signal, as Obtain the change curve of the target parameter value of the intermodulation signal with time delay deviation value at the target parameter value of the intermodulation signal corresponding to the corresponding delay deviation value;

The second selection subunit is adapted to use the time delay deviation value corresponding to the minimum target parameter value of the signal in the change curve of the target parameter value of the intermodulation signal as the calibration time Extension value.

In another embodiment of the present invention, the radio frequency device 70 may further include: a difference curve acquisition unit (not shown) and a calibration control unit (not shown). among them:

The difference curve obtaining unit is adapted to calculate the target parameter value of the intermodulation signal in the change curve of the time delay deviation value after obtaining the change curve of the target parameter value of the intermodulation signal with time delay deviation value. The difference between the target parameter values corresponding to the adjacent delay deviation values, and the corresponding difference curve is obtained;

The calibration control unit is adapted to end the time delay calibration process when the direction of the difference curve changes.

In an embodiment of the present invention, the power supply voltage calculation subunit 721 may include: an envelope calculation module 7211, a delay adjustment module 7212, a power supply voltage calculation module 7213, an analog-to-digital conversion module 7214, and an envelope tracking module 7215. among them:

The envelope calculation module 7211 is adapted to calculate the envelope of the input signal;

The delay adjustment module 7212 is adapted to receive a plurality of first delay configuration values for delay adjustment of the envelope of the input signal, and respectively adjust the value of the input signal based on each of the first delay configuration values. Envelope

The power supply voltage calculation module 7213 is adapted to obtain a first power supply voltage control signal corresponding to the first time delay configuration value based on the adjusted envelope of the input signal;

The analog-to-digital conversion module 7214 is adapted to perform analog-to-digital conversion on the obtained first power supply voltage control signal corresponding to the first time delay configuration value to obtain a corresponding analog voltage control signal;

The envelope tracking module 7215 is adapted to obtain the corresponding first supply voltage based on the obtained analog voltage control signal, which is respectively used as the supply voltage of the power amplifier to supply power to the power amplifier.

In a specific implementation, after the envelope calculation module 7211 calculates the envelope of the input signal, the delay adjustment module 7212 can adjust the envelope of the input signal based on any first delay configuration value, and the power supply voltage calculation module 7213 can The first supply voltage control signal corresponding to the envelope of the input signal after the time delay adjustment is obtained through the correspondence table between the envelope and the voltage (ie, the PVT table), and the first supply voltage control signal is a digital signal. Then, the analog-to-digital conversion module 7214 can perform digital-to-analog conversion on the first supply voltage control signal to obtain a corresponding analog voltage control signal. The envelope tracking module 7215 can obtain the corresponding first supply voltage, that is, the instantaneous supply voltage of the input signal based on the analog voltage control signal, and provide the instantaneous supply voltage of the input signal as the supply voltage to the PA 77.

In a specific implementation, the input signal received by the receiving unit 71 may be generated by a training sequence generator. The training sequence generator can generate a training sequence according to the bandwidth of the initialized transmission path and the bandwidth of the channel where the target parameter value calculation subunit 723 is located.

Taking the input signal as a two-tone signal as an example, the frequency setting of the signal generated by the training sequence generator needs to meet the following conditions:

1) The intermodulation signal (including the third-order intermodulation and the fifth-order intermodulation) generated by the PA 77 after the generated signal can pass the down-conversion module 7231 of the target parameter value calculation subunit 723;

2) The frequency interval of the generated signal is a multiple of the sampling rate or fast Fourier transform length of the channel where the target parameter value calculation subunit 723 is located. The energy of the intermodulation signal generated after PA 77 can be concentrated at a finite point after FFT on.

It can be seen from the foregoing that the radio frequency device 70 in the embodiment of the present invention can perform the time delay and envelope calibration of the input signal through software, which is more convenient to implement and requires a shorter time.

The embodiment of the present invention also provides a computer-readable storage medium, on which computer instructions are stored, and when the computer instructions are executed by a processor, the steps of any one of the delay calibration methods in the above-mentioned embodiments are executed. Go into details.

In a specific implementation, the computer-readable storage medium may include: ROM, RAM, magnetic disk, or optical disk, etc.

An embodiment of the present invention also provides a wireless radio frequency device. The radio frequency device may include a memory and a processor. The memory stores computer instructions that can run on the processor, and the processor runs the The steps of any one of the delay calibration methods described in the foregoing embodiments are executed when the computer is instructed, and details are not described herein again.

Although the present invention is disclosed as above, the present invention is not limited to this. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be subject to the scope defined by the claims.

Claims

A time delay calibration method, characterized in that it is suitable for wireless radio frequency equipment, the radio frequency equipment includes a transmission path, and the transmission path includes a power amplifier; the method includes:

Receive input signal;

The time delay adjustment is performed on the envelope of the input signal and the input signal itself to obtain the change relationship of the time delay deviation value of the target parameter value of the intermodulation signal of the channel adjacent to the input signal; the time delay deviation value Is the time delay of the envelope of the input signal relative to the input signal;

Based on the change relationship of the target parameter value of the intermodulation signal of the channel adjacent to the input signal with the time delay deviation value, the calibration delay value is determined to perform the delay calibration of the signal to be sent.
The time delay calibration method according to claim 1, wherein the time delay adjustment is performed on the envelope of the input signal and the input signal itself to obtain an intermodulation signal of a channel adjacent to the input signal The relationship between the target parameter value and the deviation value with time delay, including:

Receiving multiple first time delay configuration values for adjusting the time delay of the envelope of the input signal, and multiple second time delay configuration values for adjusting the time delay of the input signal itself;

Adjust the envelope of the input signal based on each of the first time delay configuration values to obtain first power supply voltages corresponding to the first time delay configuration values, respectively, as the power supply voltages of the power amplifier;

Adjust the delay of the input signal itself based on each of the second delay configuration values, and respectively input them into the transmission path of the radio frequency device;

Acquiring output signals of the power amplifiers when powered by each of the first supply voltages;

Obtain corresponding target parameter values of the intermodulation signal of the channel adjacent to the input signal based on the output signal of the power amplifier;

Based on the target parameter value of the intermodulation signal of each channel adjacent to the input signal, the relationship between the target parameter value of the intermodulation signal of the channel adjacent to the input signal and the time delay deviation value is obtained.
3. The time delay calibration method according to claim 2, wherein the obtaining corresponding target parameter values of the intermodulation signal of the channel adjacent to the input signal based on the output signal of the power amplifier respectively comprises:

Performing down-conversion processing on the output signal of the power amplifier;

Performing analog-to-digital conversion processing on the signal after down-conversion processing;

Performing a fast Fourier transform on the signal processed by the analog-to-digital conversion;

Obtaining an intermodulation signal of a channel adjacent to the input signal from the frequency domain signal obtained by the fast Fourier transform;

Calculate the target parameter value of the intermodulation signal of the channel adjacent to the input signal at the intermodulation point.
8. The time delay calibration method according to claim 3, wherein the relationship between the target parameter value of the intermodulation signal of the channel adjacent to the input signal and the time delay deviation value includes:

The change relationship of the target parameter value of the intermodulation signal of the adjacent channel on the input signal with the time delay deviation value, and the change relationship of the target parameter value of the intermodulation signal of the adjacent channel below the input signal with the time delay deviation value.
The time delay calibration method according to claim 4, wherein:

The target parameter value is the sum of the power values of the intermodulation signal on the same adjacent channel as the input signal at all the intermodulation points, or the amplitude of the intermodulation signal on the same adjacent channel as the input signal at all the intermodulation points The sum of the squares of the value.
The delay calibration method according to claim 4, wherein the determining the calibration delay value based on the change relationship of the time delay deviation value based on the target parameter value of the intermodulation signal of the channel adjacent to the input signal includes :

Select the target parameter value of the intermodulation signal of the adjacent channel on the input signal, and the larger one of the target parameter value of the intermodulation signal of the adjacent channel on the input signal as the intersection corresponding to the corresponding delay deviation value. The target parameter value of the modulation signal to obtain the variation curve of the target parameter value of the intermodulation signal with time delay deviation value;

In the variation curve of the target parameter value of the intermodulation signal with the time delay deviation value, the delay deviation value corresponding to the minimum target parameter value is used as the calibration delay value.
7. The time delay calibration method according to claim 6, wherein after obtaining the change curve of the time delay deviation value of the target parameter value of the intermodulation signal, the method further comprises:

Calculate the difference between the target parameter values corresponding to adjacent time delay deviation values in the change curve of the target parameter value of the intermodulation signal with time delay deviation value to obtain the corresponding difference curve;

When the direction of the difference curve changes, the time delay calibration process ends.
A wireless radio frequency device, wherein the radio frequency device includes a transmission path, and the transmission path includes a power amplifier; and further includes:

A receiving unit, adapted to receive input signals;

The target parameter value calculation unit is adapted to adjust the time delay of the envelope of the input signal and the input signal itself to obtain the change in the time delay deviation value of the target parameter value of the intermodulation signal of the channel adjacent to the input signal Relationship; the time delay deviation value is the time delay of the envelope of the input signal relative to the input signal;

The delay calibration unit is adapted to determine the calibration delay value based on the change relationship of the target parameter value of the intermodulation signal of the channel adjacent to the input signal with the time delay deviation value, so as to perform the delay calibration on the signal to be sent.
8. The radio frequency device according to claim 8, wherein the target parameter value calculation unit comprises:

The power supply voltage calculation subunit is adapted to receive a plurality of first delay configuration values for delay adjustment of the envelope of the input signal, and adjust the envelope of the input signal respectively based on each of the first delay configuration values , Obtain the first power supply voltages respectively corresponding to the first time delay configuration values, and respectively serve as the power supply voltages of the power amplifier;

The delay adjustment subunit is adapted to receive a plurality of second delay configuration values for adjusting the delay of the input signal itself, and adjust the delay of the input signal itself based on each of the second delay configuration values , And respectively input to the transmission path of the wireless radio frequency device;

The target parameter value calculation subunit is adapted to obtain the output signal of the power amplifier when it is powered by each of the first supply voltages, and obtain the corresponding output signal adjacent to the input signal based on the output signal of the power amplifier. The target parameter value of the intermodulation signal of the channel;

The change relationship determination subunit is adapted to obtain the target parameter value of the intermodulation signal of the channel adjacent to the input signal based on the target parameter value of the intermodulation signal of the channel adjacent to the input signal. The relationship of change.
9. The radio frequency device of claim 9, wherein the target parameter value calculation subunit comprises:

A down-conversion module, adapted to perform down-conversion processing on the output signal of the power amplifier;

An analog-to-digital conversion module, adapted to perform analog-to-digital conversion processing on the signal after the down-conversion processing;

A Fourier transform module, adapted to perform fast Fourier transform on the signal processed by the analog-to-digital conversion;

The calculation module is adapted to obtain the intermodulation signal of the channel adjacent to the input signal from the frequency domain signal obtained by the fast Fourier transform, and calculate the intermodulation signal of the channel adjacent to the input signal The target parameter value at the intersection point.
9. The radio frequency device of claim 10, wherein the change relationship determining subunit, and the obtained change relationship comprises:

The change relationship of the target parameter value of the intermodulation signal of the adjacent channel on the input signal with the time delay deviation value, and the change relationship of the target parameter value of the intermodulation signal of the adjacent channel below the input signal with the time delay deviation value.
The radio frequency device according to claim 11, wherein the target parameter value calculated by the calculation module is the sum of the power values of the intermodulation signals on the same adjacent channel as the input signal at all the intermodulation points, or is The square sum of the amplitude values of the intermodulation signal on the same adjacent channel as the input signal at all the intermodulation points.
The wireless radio frequency device according to claim 11, wherein the time delay calibration unit comprises:

The first selection subunit is adapted to select the target parameter value of the intermodulation signal of the adjacent channel on the input signal, and the larger one of the target parameter value of the intermodulation signal of the adjacent channel on the input signal as the corresponding The target parameter value of the intermodulation signal corresponding to the time delay deviation value, and the change curve of the target parameter value of the intermodulation signal with time delay deviation value is obtained;

The second selection subunit is adapted to use the time delay deviation value corresponding to the minimum target parameter value of the signal in the change curve of the target parameter value of the intermodulation signal as the calibration delay value .
The wireless radio frequency device of claim 13, further comprising:

The difference curve acquisition unit is adapted to calculate the target parameter value of the intermodulation signal in the change curve of the time delay deviation value after obtaining the change curve of the target parameter value of the intermodulation signal with time delay deviation value. The difference between the target parameter values corresponding to the delay deviation value, and the corresponding difference curve is obtained;

The calibration control unit is adapted to end the time delay calibration process when the direction of the difference curve changes.
9. The radio frequency device of claim 9, wherein the power supply voltage calculation subunit comprises:

An envelope calculation module, adapted to calculate the envelope of the input signal;

The delay adjustment module is adapted to receive a plurality of first delay configuration values for delay adjustment of the envelope of the input signal, and adjust the envelope of the input signal respectively based on each of the first delay configuration values;

The power supply voltage calculation module is adapted to obtain the first power supply voltage control signals respectively corresponding to the first time delay configuration value based on the adjusted envelope of the input signal;

The analog-to-digital conversion module is adapted to perform analog-to-digital conversion on the obtained first power supply voltage control signal corresponding to the first time delay configuration value to obtain a corresponding analog voltage control signal;

The envelope tracking module is adapted to obtain the corresponding first power supply voltage based on the obtained analog voltage control signal, which is respectively used as the power supply voltage of the power amplifier to supply power to the power amplifier.
A computer-readable storage medium having computer instructions stored thereon, wherein the computer instructions execute the steps of any one of claims 1 to 7 when the computer instructions are executed by a processor.
A wireless radio frequency device, comprising a memory and a processor, the memory stores computer instructions that can run on the processor, wherein the processor executes claims 1 to 7 when the computer instructions are executed. Any of the steps of the method.