WO2019001279A1

WO2019001279A1 - Vector standing wave ratio acquisition method, fpga and remote radio frequency unit

Info

Publication number: WO2019001279A1
Application number: PCT/CN2018/091126
Authority: WO
Inventors: 张恩溯; 李虎虎; 陈凯
Original assignee: 中兴通讯股份有限公司
Priority date: 2017-06-27
Filing date: 2018-06-13
Publication date: 2019-01-03
Also published as: CN109150322A; CN109150322B

Abstract

Provided are a vector standing wave ratio acquisition method, a field programmable gate array (FPGA) and a remote radio frequency (RF) unit, wherein an amplitude value of a reflection coefficient of each signal period is directly calculated (S104) by means of acquiring maximum amplitude values of a pulse emission signal and a reflection signal during each signal period (S101, S102); directly calculating a phase of the reflection coefficient of each signal period (S105) by means of acquiring a time delay of the pulse emission signal and the reflection signal during each signal period (S103) and combining the same with a preset acquisition frequency; determining the reflection coefficient of each corresponding signal period according to the amplitude and phase of the reflection coefficient of the each corresponding signal period (S106), and obtaining the vector standing wave ratio of the each corresponding signal period according to the reflection coefficient (S107).

Description

Vector standing wave ratio acquisition method, FPGA and remote radio unit

Technical field

The present disclosure relates to the field of communications technologies, and in particular, to a vector standing wave ratio acquisition method, an FPGA, and a remote radio unit.

Background technique

In communication technology, the vector standing wave ratio detection is applied to the remote radio unit (RRU) to solve the VSWR conversion scheme in the scalar standing wave ratio detection scheme (the power amplifier port reflection coefficient to the antenna standing wave ratio) ) and the error caused by the use of scalar calculations, causing a problem that the antenna standing wave ratio detection error is large. In the existing method of detecting the vector standing wave ratio, a large amount of data of a transmitted signal and a reflected signal is collected by an FPGA (Field Programmable Gate Array), and is transmitted to a DSP (Digital Signal Processor). Processor) to calculate the reflection coefficient. For example, when calculating the reflection coefficient, the DSP performs delay alignment processing on the acquired data of a large number of transmitted signals and reflected signals, and performs data filtering, and calculates data according to the corresponding points of the transmitted signal and the reflected signal after the delay alignment processing. The phase of the reflection coefficient is obtained, and the average power of the transmitted signal and the reflected signal are respectively calculated by Fourier transform and inverse Fourier transform according to the processed data of the transmitted signal and the reflected signal, and then the reflection is obtained according to the average power of the transmitted signal and the reflected signal. The magnitude of the coefficient multiplies the amplitude and phase of the reflection coefficient to obtain the reflection coefficient. The vector standing wave ratio is then obtained by the RRU's central processing unit based on the reflection coefficient calculated by the DSP. However, when the vector standing wave ratio is obtained according to the above existing method, the amount of data required to be acquired is large, the calculation process is complicated, and the demand for resources is high.

Summary of invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

When the vector standing wave ratio is obtained according to the existing method, the amount of data to be acquired is large, the calculation process is complicated, and the demand for resources is high, the present disclosure provides a vector standing wave ratio acquisition method of the embodiment, FPGA and remote RF unit.

An embodiment of the present disclosure provides a method for acquiring a vector standing wave ratio, including:

Obtaining a maximum amplitude value of the periodic pulse transmission signal in each signal period, and collecting a maximum amplitude value of the reflected signal of the periodic pulse transmission signal in each signal period according to a preset acquisition frequency;

Obtaining a delay corresponding to the periodic pulse transmitting signal and the reflected signal in each signal period;

Obtaining, according to a maximum amplitude value of the periodic pulse transmitting signal and the reflected signal in each signal period, an amplitude of a reflection coefficient corresponding to each signal period, and acquiring, according to the acquiring frequency and a delay corresponding to each signal period, corresponding to each signal period. The phase of the reflection coefficient;

And determining, according to the amplitude and phase of the reflection coefficient corresponding to each signal period, the reflection coefficient corresponding to each signal period, and acquiring the vector standing wave ratio corresponding to each signal period according to the reflection coefficient corresponding to each signal period.

The embodiment of the present disclosure further provides a field programmable gate array FPGA, including: a signal transmitter, an acquisition processing device, and a reflection coefficient calculation device;

The signal transmitter is configured to transmit a periodic pulse transmission signal, and to a maximum amplitude value of the periodic pulse transmission signal in each signal period, and a maximum amplitude value of the periodic pulse transmission signal in the first signal period Corresponding time is sent to the reflection coefficient calculation device;

The collection processing device is configured to: when the signal transmitter transmits a periodic pulse transmission signal, acquire a maximum amplitude value of the reflected signal of the periodic pulse transmission signal in each of the signal periods according to a preset acquisition frequency, and Obtaining a time when the maximum amplitude value of the reflected signal is collected in each of the signal periods;

The reflection coefficient calculating means is configured to calculate a magnitude of a reflection coefficient of each signal period according to a maximum amplitude value of the periodic pulse transmission signal and a maximum amplitude value of the reflected signal in each of the signal periods;

The reflection coefficient calculation device is further configured to calculate, according to a time corresponding to a maximum amplitude value of the periodic pulse transmission signal sent by the signal transmitter in a first signal period, and a period duration of the signal period a time corresponding to the maximum amplitude value in the signal period, and combining the preset acquisition frequency and the time of the maximum amplitude value of the reflected signal obtained by the acquisition processing device, calculating a phase of the reflection coefficient of each signal period; and setting The amplitude and phase of the reflection coefficients for each signal period determine the reflection coefficient for each signal period.

The embodiment of the present disclosure further provides a remote radio unit, including: a processor, and the FPGA connected to the processor;

The FPGA is configured to transmit a periodic pulse transmission signal and calculate a reflection coefficient of the periodic pulse transmission signal in each signal period;

The processor is configured to calculate a vector standing wave ratio of the periodic pulse transmission signal in each signal period according to a reflection coefficient of the periodic pulse transmission signal calculated by the FPGA in each signal period.

An embodiment of the present disclosure further provides a vector standing wave ratio obtaining apparatus, including a data acquiring module and a processing module.

The data acquisition module is configured to acquire a maximum amplitude value of the periodic pulse transmission signal in each signal period, and acquire a maximum amplitude value of the reflected signal of the periodic pulse transmission signal in each signal period according to a preset acquisition frequency; And setting a time delay corresponding to the periodic pulse transmitting signal and the reflected signal in each signal period;

The processing module is configured to acquire, according to a maximum amplitude value of the periodic pulse transmitting signal and the reflected signal in each signal period, a magnitude of a reflection coefficient corresponding to each signal period, and obtain corresponding signals according to the collecting frequency and a delay corresponding to each signal period. a phase of the reflection coefficient of the period, thereby determining a reflection coefficient corresponding to each signal period; and being configured to acquire a vector standing wave ratio corresponding to each signal period according to a reflection coefficient corresponding to each signal period.

Embodiments of the present disclosure also provide a computer storage medium having stored therein computer executable instructions for performing the aforementioned vector standing wave ratio acquisition method.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

FIG. 1 is a schematic flowchart diagram of a method for acquiring a vector standing wave ratio according to Example 1 of the present disclosure;

2 is a schematic diagram of waveforms of several periodic pulse transmission signals according to Example 1 of the present disclosure;

3 is a comparison diagram of an acquisition data and a periodic pulse transmission signal according to Example 1 of the present disclosure;

4 is a schematic flow chart of collecting a maximum amplitude value of a reflected signal in each signal period and determining a corresponding time according to Example 1 of the present disclosure;

FIG. 5 is a schematic structural diagram of a vector standing wave ratio obtaining apparatus according to Example 2 of the present disclosure;

6 is a schematic structural diagram of a remote radio unit according to Example 3 of the present disclosure;

7 is a schematic structural diagram of a field programmable gate array according to Example 3 of the present disclosure;

8 is a schematic structural diagram of an acquisition processing device according to Example 3 of the present disclosure;

9 is a schematic structural diagram of a data processing unit according to Example 3 of the present disclosure;

10 is a schematic structural diagram of a more detailed data processing unit of Example 3 of the present disclosure;

11 is a schematic structural diagram of a reflection coefficient calculation device according to Example 3 of the present disclosure;

12 is a schematic structural diagram of a detailed field programmable gate array according to Example 4 of the present disclosure.

Detailed

The embodiments of the present disclosure will be described in detail below by way of exemplary embodiments with reference to the accompanying drawings.

Example 1:

In order to reduce the requirement for resources of the vector standing wave ratio and simplify the calculation process, the embodiment of the present disclosure provides a vector standing wave ratio acquisition method. Referring to FIG. 1, FIG. 1 is a schematic flowchart of a method for acquiring a vector standing wave ratio according to an embodiment of the present invention, including:

S101: Acquire a maximum amplitude value of the periodic pulse transmission signal in each signal period;

In this embodiment, since the pulse transmission signal is periodic, only the maximum amplitude value in the first signal period can be obtained as the maximum amplitude value of the pulse transmission signal in each signal period; The maximum amplitude value can also be reacquired in each signal cycle to ensure the accuracy of the maximum amplitude value obtained during the signal period. The acquisition of the maximum amplitude value of the pulsed transmission signal over each signal period can be achieved by a signal detector.

When generating the periodic pulse transmission signal, the relevant parameters of the pulse transmission signal, such as waveform, period, maximum amplitude, etc., are set in the signal generator in advance. Therefore, in order to reduce the circuit complexity, the signal detector may not be set. At this time, the preset maximum amplitude is directly obtained from the generating device of the periodic pulse transmitting signal as the maximum amplitude value of the pulse transmitting signal in each signal period. can.

For a pulse signal, it essentially transmits a pulse with a periodic interval, such as three periodic pulse transmission signals as shown in FIG. 2, and the signal waveform of the s ₀ portion is the transmitted pulse, and the s ₁ portion means that the signal waveform of the transmission pulse interval, i.e., _a substantial portion of the transmitted pulse not s. Therefore, in the present embodiment, for the periodic pulse transmission signal, the start time must be the start time of transmitting the first pulse signal. That is, in the present embodiment, the waveform of each signal period is a waveform starting from a pulse signal waveform and ending with a line characterizing 0 level.

S102: Acquire a maximum amplitude value of a reflected signal of the periodic pulse transmission signal in each signal period according to a preset acquisition frequency;

In this embodiment, since the pulse transmission signal is a periodic signal starting from a pulse signal and ending at a level of 0, the reflected signal is also within a signal period time (in time for receiving the reflected signal). Starting with the pulse signal, ending at level 0, the maximum amplitude is determined by the reflected pulse signal.

In this embodiment, in order to ensure the timeliness of the data collection of the reflected signal, the data of the reflected signal may be collected when the periodic pulse transmission signal is transmitted. Since the received reflected signal is delayed compared to the pulsed transmitted signal, when the reflected signal is not returned, the data collected at this time is characterized by a 0 level, after which the pulse signal in the reflected signal is acquired, and the corresponding 0 power is thereafter Flat signal. Therefore, for the collected reflected signal data, it can be represented by a waveform diagram as shown in FIG. 3. The upper waveform in FIG. 3 is a periodic pulse transmission signal, and the lower side is a waveform image formed by the collected data. It can be seen from the comparison of the two that the starting time of collecting data is the starting time t _{0 of} the periodic pulse transmitting signal. Let T denote the duration of the signal period, and n denote the nth signal period. In this embodiment, the maximum amplitude value of the reflected signal in each signal period is: t ₀ +(n-1)T to t ₀ +nT The maximum amplitude value of the reflected signal data collected during the time period.

Therefore, in order to ensure that the collected data in each signal period contains the data of the pulse signal of the reflected signal, in the periodic pulse transmission signal, the transmission interval of the pulse signal must be greater than or equal to the received reflected signal and the transmitted pulse transmitted signal. The delay between. In practical engineering applications, in the periodic pulse transmission signal, the transmission interval of the pulse signal is much larger than the delay between the received reflected signal and the transmitted pulse transmitted signal.

In this embodiment, the acquisition frequency may be preset by an engineer according to actual needs. Thereafter, the collected data is divided according to the signal period, and the data in the same signal period is compared, thereby obtaining the maximum amplitude value corresponding to each signal period.

There is no timing relationship in steps S101 and S102 in this embodiment.

S103: Obtain a delay corresponding to a periodic pulse transmission signal and a reflection signal in each signal period;

In this embodiment, the delay between the pulsed emission signal and the reflected signal can be recorded by recording the start time t _{0 of the} transmitted pulse signal, and recording the time t _{1 of the} first acquisition of the non-zero data of the reflected signal (because the reflected signal is also The pulse signal is in front, so the time t _{1 at which the} non-zero data of the reflected signal is first collected can be used to indicate the reception time of the reflected signal), and the delay between the pulsed signal and the reflected signal can be determined by t ₁ -t ₀ . And determine that the delay is consistent within each signal period.

In the above process of determining the delay, t ₁ is the time when the reflected pulse signal is first collected, which is limited by the acquisition frequency, and may be greatly deviated from the reception time of the real reflected signal, and therefore, the signal period can be passed. The time corresponding to the maximum amplitude of the internal pulsed emission signal and the reflected signal determines the time delay corresponding to the periodic pulsed emission signal and the reflected signal in each signal period. For example, the time corresponding to the maximum amplitude value of the periodic pulse transmission signal in each signal period is obtained, and the time corresponding to the maximum amplitude value of the reflected signal in each signal period is obtained; and corresponding to the maximum amplitude value of the reflected signal in each signal period. The time corresponding to the maximum amplitude value of the periodic pulse transmission signal determines the time delay corresponding to the periodic pulse transmission signal and the reflection signal in each signal period.

For example, it is assumed that the time corresponding to the maximum amplitude of the pulse transmission signal in a certain signal period is t ₂ , and the time corresponding to the maximum amplitude of the reflected signal is t ₃ , and the calculation delay is t ₃ -t ₂ . In this embodiment, only the delay corresponding to the pulse transmission signal and the reflection signal in the first signal period may be calculated, and the delay is used as the corresponding delay in each signal period. In this embodiment, the delay corresponding to the pulsed emission signal and the reflected signal in each signal period can also be separately calculated.

S104: Acquire an amplitude of a reflection coefficient corresponding to each signal period according to a maximum amplitude value of the periodic pulse transmission signal and the reflection signal in each signal period;

It is assumed that the maximum amplitude value of the pulse transmission signal is A1 in a certain signal period, and the maximum amplitude value of the reflection signal is A2, and the amplitude of the reflection coefficient is A2/A1.

S105: Acquire a phase corresponding to a reflection coefficient of each signal period according to an acquisition frequency and a delay corresponding to each signal period;

Let the acquisition frequency be f, and the delay in a signal period is τ, then the phase of the corresponding reflection coefficient in the signal period is cos(2πfτ)+isin(2πfτ). The former formula is a complex number, cos(2πfτ) is the real part of the complex number, and sin(2πfτ) is the imaginary part of the complex number, i is (-1) ^1/2 .

There is no timing relationship in steps S104 and S105 in this embodiment.

S106: Determine a reflection coefficient corresponding to each signal period according to an amplitude and a phase of a reflection coefficient corresponding to each signal period;

It is assumed that the amplitude of the reflection coefficient is A2/A1 and the phase is cos(2πfτ)+isin(2πfτ) in a certain signal period, and the reflection coefficient Г=A2/A1[cos(2πfτ)+isin(2πfτ)].

S107: Acquire a vector standing wave ratio corresponding to each signal period according to a reflection coefficient corresponding to each signal period.

The final standing wave ratio VSWR can be calculated according to the formula VSWR=(1+Г)/(1-Г). In the present embodiment, since the reflection coefficient Γ is a vector value, it has amplitude and phase information, thereby accurately acquiring the standing wave ratio.

In this embodiment, the time delay corresponding to the periodic pulse transmitting signal and the reflected signal in each signal period is determined by the time corresponding to the maximum amplitude of the pulse transmitting signal and the reflected signal in each signal period, for periodic pulses in each signal period. The time corresponding to the maximum amplitude value of the transmitted signal may be obtained by detecting the maximum amplitude value of the periodic pulse transmission signal in each signal period and determining the corresponding time.

In the above method, the pulse transmission signal is monitored in real time, and the demand for resources is large. In fact, since the pulse transmission signal is a periodic signal, the time corresponding to the maximum amplitude value in each cycle also corresponds. Therefore, it is possible to acquire only the time corresponding to the maximum amplitude value of the periodic pulse transmission signal in the first signal period; and calculate the remaining signal period based on the time corresponding to the maximum amplitude value in the first signal period and the period duration of the signal period. The time corresponding to the maximum value. For example, if the period of the signal period is T, and the time corresponding to the maximum amplitude value in the first signal period is t ₄ , the time corresponding to the maximum amplitude value in the nth signal period is t ₄ +(n-1)T.

The manner of determining the maximum amplitude value corresponding to the periodic pulse transmission signal in each signal period may be adapted to obtain the preset maximum amplitude directly from the generating device of the periodic pulse transmitting signal as the pulse transmitting signal in each signal period. The solution of the maximum amplitude value, at this time, the time corresponding to the maximum amplitude value of the pulse transmission signal in each signal period can be determined according to the waveform of the pulse signal. For example, for the first arc pulse and the second triangular pulse as shown in FIG. 2, the duration of the pulse signal is T ₁ , or the interval between the two pulse signals is T ₂ , then the nth signal The time corresponding to the maximum amplitude value in the period is 1/2T ₁ +(n-1)T, or 1/2(TT ₂ )+(n-1)T. For the third square waveform pulse shown in FIG. 2, the generation time of the square wave pulse in each signal period can be used as the time corresponding to the maximum amplitude value.

For a square wave, there is more than one point corresponding to the maximum amplitude value in one signal period, so it is possible to obtain the time when the amplitude value of the square wave reaches the maximum amplitude value in the first signal period as the signal with the periodic pulse emission. The time corresponding to the maximum amplitude value in the first signal period, thereby determining the corresponding time of the maximum amplitude value in each signal period. At this time, the relevant signal detecting device is needed to accurately obtain the time when the amplitude value of the square wave reaches the maximum amplitude value.

In the above manner, the demand for resources is high due to the intervention of the relevant signal detecting means. In practical applications, the time during which the square wave is generated to reach the maximum amplitude value is very short, so the start time of the square wave can be obtained as the time corresponding to the maximum amplitude value of the periodic pulse transmission signal in the first signal period. Thereby, the determination of the corresponding time of the maximum amplitude value in each signal period is performed. In this way, the intervention of the relevant signal detecting device is not required, and the time corresponding to the maximum amplitude value of the periodic pulse transmitting signal in the first signal period can be obtained directly by the generating device of the periodic pulse transmitting signal.

In this embodiment, the maximum amplitude value in each signal period is determined for the collected reflected signal and the corresponding time is determined. The process is shown in FIG. 4, and includes:

S401: Acquire an amplitude value of the reflected signal according to a preset acquisition frequency;

S402: Record the sequence number of each amplitude value collected;

S403: compare magnitudes corresponding to the sequence numbers collected in the same signal period;

The determination as to whether or not the data is acquired in the same signal period can be determined by the sequence number of the record. For example, if the period of the signal period is T seconds and the preset acquisition frequency is M/T, the sequence number is 1+(n-1)M to nM, which is the data collected in the nth signal period.

S404: Determine a maximum amplitude value of the reflected signal in each signal period;

In this embodiment, the comparison of the acquired amplitude values in the same signal period may be: comparing the amplitude value of the previous sequence number with the amplitude value of the subsequent sequence number, discarding the smaller one; continuing with the next sequence The amplitude values of the numbers are compared so that the maximum amplitude value is finally retained.

S405: Calculate a time when the maximum amplitude value of the reflected signal is collected in each signal period according to the sequence number of the maximum amplitude value in each signal period and the preset acquisition frequency.

The sequence number of the record has a corresponding relationship with the preset acquisition frequency and the acquisition time. The acquisition time = sequence number ÷ preset acquisition frequency.

In this embodiment, when the sequence numbers of the acquired amplitude values are recorded, the acquisition time of the sequence value corresponding to the sequence number is saved, and the correspondence between the sequence number and the acquisition time is established, and then the maximum is determined according to each signal period. The sequence number of the amplitude value can directly get the corresponding time.

In this embodiment, in order to ensure the accuracy of the final calculation result, the data of the reflected signals collected according to the preset acquisition frequency may be averaged to determine the amplitude of each collection point, and finally find out more in each signal cycle. The exact maximum amplitude.

The average amplitude value of the acquired consecutive amplitude values of K sequence numbers in the same signal period can be calculated, and the calculated average amplitude value is used as the amplitude value corresponding to the smallest sequence number among the collected K sequence numbers, and finally The amplitude values corresponding to the sequence numbers collected in the same signal period are compared in size. At this time, the size comparison is performed on the calculated average value.

The average calculation in this embodiment is the data collected in the same signal period. For the last K-1 data collected in the same signal period, the number of the average values used for calculation is insufficient, and the complement is added by adding 0. For example, if K is 8, and there are 50 amplitude values collected in the same signal period, the final determined amplitude number of the sequence number is the average of the first 8 amplitude values collected, and the sequence number is 2 The value is the average value of the collected second amplitude value to the ninth amplitude value, and so on. For the amplitude value of sequence number 44, it is the collected 44th amplitude value to the 50th amplitude value. Add an average value of 0 divided by 8 and the amplitude value of sequence number 45 is the average value of the 45th amplitude value to the 50th amplitude value, plus 2 zeros divided by 8 and so on. For the amplitude value of sequence number 50, the average value of the 50th amplitude value collected is further supplemented by 7 zeros divided by 8.

The method for acquiring the vector standing wave ratio provided by this embodiment may be implemented by using a DSP, or may be implemented only by using an FPGA. When implemented only by FPGA, there is no need to set up the DSP in the RRU device, which reduces the cost and simplifies the circuit complexity.

The vector standing wave ratio obtaining method provided in this embodiment directly calculates the amplitude of the reflection coefficient corresponding to each signal period by acquiring the maximum amplitude value of the transmitted signal and the reflected signal in each signal period, directly passing the transmitted signal and the reflected signal. The delay of each signal period calculates the phase of the reflection coefficient corresponding to each signal period, which reduces the amount of data to be acquired, simplifies the calculation process, and reduces the demand for resources.

Example two:

In order to reduce the requirement of resources for acquiring the vector standing wave ratio and simplify the calculation process, the embodiment of the present disclosure provides a vector standing wave ratio obtaining device. Referring to FIG. 5, FIG. 5 is a schematic structural diagram of a vector standing wave ratio obtaining apparatus according to an embodiment, which includes a data acquiring module 51 and a processing module 52, where:

The data acquisition module 51 is configured to acquire a maximum amplitude value of the periodic pulse transmission signal in each signal period, and acquire a maximum amplitude value of the reflected signal of the periodic pulse transmission signal in each signal period according to a preset acquisition frequency; And setting a time delay corresponding to the periodic pulse transmitting signal and the reflected signal in each signal period.

The processing module 52 is configured to obtain, according to the maximum amplitude value of the periodic pulse transmission signal and the reflection signal in each signal period, the amplitude of the reflection coefficient corresponding to each signal period, and obtain corresponding signals according to the acquisition frequency and the delay corresponding to each signal period. a phase of the reflection coefficient of the period, thereby determining a reflection coefficient corresponding to each signal period; and being configured to acquire a vector standing wave ratio corresponding to each signal period according to a reflection coefficient corresponding to each signal period.

In this embodiment, since the pulse transmission signal is periodic, the data acquisition module 51 can obtain only the maximum amplitude value in the first signal period, thereby using the maximum amplitude value of the pulse transmission signal in each signal period; In this embodiment, the data acquisition module 51 can also reacquire the maximum amplitude value once in each signal period, thereby ensuring the accuracy of the maximum amplitude value acquired in the signal period.

For a pulsed transmit signal, it is essentially a pulse with periodic intervals, so for a periodic pulsed transmit signal, its start time is the start time at which the first pulse signal is transmitted. That is, in the present embodiment, the waveform of each signal period is a waveform starting from a pulse signal waveform and ending with a line characterizing 0 level.

In this embodiment, in order to ensure the timeliness of the data acquisition module 51 for the collection of the reflected signal data, the data of the reflected signal may be collected when the periodic pulse transmission signal is transmitted. Since the received reflected signal is delayed compared to the pulsed transmitted signal, when the reflected signal is not returned, the data acquired by the data acquiring module 51 at this time is characterized by a level of 0, after which the pulse signal in the reflected signal is acquired, and thereafter Corresponding 0 level signal. Therefore, for the collected data, the starting time of the collected data is the starting time t _{0 of} the periodic pulse transmitting signal; the maximum amplitude value of the collected reflected signal in each signal period is: at t ₀ + (n-1) The maximum amplitude value of the reflected signal data collected from T to t ₀ +nT period. T represents the duration of the signal period, and n represents the nth signal period.

Therefore, in order to ensure that the collected data of the data acquisition module 51 in each signal period includes the data of the pulse signal of the reflected signal, in the periodic pulse transmission signal, the transmission interval of the pulse signal must be greater than or equal to the received reflection signal and The delay between the transmission of the pulse transmission signal. In practical engineering applications, in the periodic pulse transmission signal, the transmission interval of the pulse signal is much larger than the delay between the received reflected signal and the transmitted pulse transmitted signal.

In this embodiment, the acquisition frequency can be preset by the engineer according to actual needs.

In this embodiment, the delay between the pulse transmission signal and the reflection signal acquired by the data acquisition module 51 can be performed by recording the start time t _{0 of the} transmission pulse transmission signal, and recording the first time the reflected signal is non-zero. The time t _{1 of the} data (because the reflected signal is also the pulse signal first, the time t _{1 at which the} non-zero data of the reflected signal is first collected can be used to indicate the reception time of the reflected signal), and the pulse emission can be determined by t ₁ -t ₀ The delay between the signal and the reflected signal, and determines that the delay is consistent over each signal period.

In the above process of determining the delay, t ₁ is the time when the reflected pulse signal is first collected, which is limited by the acquisition frequency, and may be greatly deviated from the reception time of the real reflected signal. Therefore, the data acquisition module 51 may The time delay corresponding to the periodic pulsed emission signal and the reflected signal in each signal period is determined by the time corresponding to the maximum amplitude of the pulsed signal and the reflected signal in each signal period. For example, the data acquisition module 51 acquires the time corresponding to the maximum amplitude value of the periodic pulse transmission signal in each signal period, and acquires the time corresponding to the maximum amplitude value of the reflected signal in each signal period; and then reflects the signal according to each signal period. The time corresponding to the maximum amplitude value and the time corresponding to the maximum amplitude value of the periodic pulse transmission signal determine the time delay corresponding to the periodic pulse transmission signal and the reflection signal in each signal period. In this embodiment, the data acquisition module 51 can also separately calculate the delay corresponding to the pulse transmission signal and the reflection signal in each signal period.

In this embodiment, the processing module 52 can calculate the amplitude of the reflection coefficient according to the formula A2/A1, where A1 is the maximum amplitude value of the pulse transmission signal in a certain signal period, and A2 is the maximum amplitude value of the reflection signal in the signal period. The phase of the reflection coefficient can be calculated according to the formula cos(2πfτ)+isin(2πfτ), where f is the preset acquisition frequency, τ is the corresponding delay of the signal period, and i is (-1) ^1/2 .

The processing module 52 calculates the reflection coefficient Г according to the formula Г=A2/A1[cos(2πfτ)+isin(2πfτ)], and calculates the final standing wave ratio VSWR according to the calculated Г.

In this embodiment, the data acquiring module 51 determines the time delay corresponding to the periodic pulse transmitting signal and the reflected signal in each signal period by using the time corresponding to the maximum amplitude of the pulse transmitting signal and the reflected signal in each signal period, for each signal period. One way of obtaining the time corresponding to the maximum amplitude value of the internal periodic pulse transmission signal may be to detect the maximum amplitude value of the periodic pulse transmission signal in each signal period and determine the corresponding time.

In the above manner, the data acquisition module 51 performs real-time monitoring on the pulse transmission signal, and the demand for resources is large. In fact, since the pulse transmission signal is a periodic signal, the time corresponding to the maximum amplitude value in each cycle also corresponds. Therefore, the data acquisition module 51 may only acquire the time corresponding to the maximum amplitude value of the periodic pulse transmission signal in the first signal period; and calculate the time corresponding to the maximum amplitude value in the first signal period and the period duration of the signal period. The time corresponding to the maximum amplitude value in the remaining signal periods.

The manner in which the data acquiring module 51 determines that the maximum amplitude value of the periodic pulse transmission signal in each signal period corresponds to the time may be applied to directly obtain the preset maximum amplitude from the generating device of the periodic pulse transmitting signal as the pulse transmitting signal. The scheme of the maximum amplitude value in each signal period, at which time the time corresponding to the maximum amplitude value of the pulse transmission signal in each signal period can be determined according to the waveform of the pulse signal.

For a square wave, there is more than one point corresponding to the maximum amplitude value in one signal period, so the data acquisition module 51 can acquire the time when the amplitude value of the square wave reaches the maximum amplitude value in the first signal period as the periodicity. The time corresponding to the maximum amplitude value of the pulsed transmission signal in the first signal period, thereby determining the corresponding time of the maximum amplitude value in each signal period.

In practical applications, the time during which the square wave is generated to reach the maximum amplitude value is very short, so the data acquisition module 51 can acquire the start time of the square wave as the maximum amplitude value corresponding to the periodic pulse transmission signal in the first signal period. The time, thereby determining the corresponding time of the maximum amplitude value in each signal period.

In this embodiment, the data acquiring module 51 determines the maximum amplitude value in each signal period and determines the corresponding time for the collected reflected signal, and the process is: collecting the amplitude value of the reflected signal according to the preset acquisition frequency, and recording and collecting. The sequence number of each amplitude value obtained is compared with the amplitude values corresponding to the sequence numbers collected in the same signal period, thereby determining the maximum amplitude value of the reflected signal in each signal period, and finally according to each signal period. The sequence number of the largest value and the preset acquisition frequency are used to calculate the time at which the maximum amplitude value of the reflected signal is acquired in each signal period.

The determination by the data acquisition module 51 as to whether or not data is acquired in the same signal period can be determined by the sequence number of the record. The data acquisition module 51 compares the acquired amplitude values in the same signal period, and compares the amplitude value of the previous sequence number with the amplitude value of the subsequent sequence number, and discards the smaller one; continues with the next sequence. The amplitude values of the numbers are compared so that the maximum amplitude value is finally retained.

The sequence number recorded by the data acquisition module 51 has a corresponding relationship with the preset acquisition frequency and the acquisition time. The acquisition time=sequence number ÷the preset acquisition frequency. The sequence number in the formula is the sequence number corresponding to the maximum amplitude value, and is obtained based on the data. Module 51 can determine the time corresponding to the maximum amplitude value collected.

In this embodiment, the data acquisition module 51 may also save the acquisition time of the sequence value corresponding to the amplitude value when the sequence number of each amplitude value is collected, and establish a correspondence between the sequence number and the acquisition time, and then according to each The sequence number of the maximum amplitude value in the signal period can directly obtain the corresponding time.

In this embodiment, in order to ensure the accuracy of the final calculation result, the data acquisition module 51 may perform mean processing on the data of the reflected signals collected according to the preset acquisition frequency, thereby determining the amplitude of each collection point, and finally finding out in each More accurate maximum amplitude during the signal period.

The vector standing wave ratio obtaining device provided in this embodiment directly acquires the maximum amplitude value of the transmitted signal and the reflected signal in each signal period through the data acquiring module, so that the processing module can directly calculate the amplitude of the reflection coefficient corresponding to each signal period; The time delay of the transmitted signal and the reflected signal in each signal period is directly obtained by the data acquisition module, so that the processing module can directly calculate the phase of the reflection coefficient corresponding to each signal period, which reduces the amount of data required to be acquired, and simplifies the calculation. The process reduces the need for resources.

Example three:

Referring to FIG. 6, FIG. 6 is a schematic structural diagram of a remote radio unit according to an embodiment of the present disclosure, including a processor 61 and a field programmable gate array 62, where:

The field programmable gate array 62 is configured to transmit a periodic pulse transmission signal and calculate a reflection coefficient of the periodic pulse transmission signal in each signal period;

The processor 61 is configured to calculate the reflection coefficient of the periodic pulse transmission signal calculated in accordance with the FPGA 62 in each signal period, thereby calculating the vector standing wave ratio of the periodic pulse transmission signal in each signal period.

The structure of the field programmable gate array 62 can be seen in FIG. 7, and includes a signal transmitter 621, an acquisition processing device 622, and a reflection coefficient calculation device 623. among them,

The signal transmitter 621 is configured to transmit a periodic pulse transmission signal, and to output a maximum amplitude value of the periodic pulse transmission signal in each signal period, and a time corresponding to the maximum amplitude value of the periodic pulse transmission signal in the first signal period. Sended to the reflection coefficient calculation device;

The acquisition processing device 622 is configured to: when the signal transmitter 621 transmits the periodic pulse transmission signal, acquire the maximum amplitude value of the reflected signal of the periodic pulse transmission signal in each signal period according to the preset acquisition frequency, and acquire the signal in each signal period. The time at which the maximum amplitude value of the reflected signal is collected;

The reflection coefficient calculation means 623 is arranged to calculate the amplitude of the reflection coefficient of each signal period according to the maximum amplitude value of the periodic pulse transmission signal and the maximum amplitude value of the reflection signal in each signal period;

The reflection coefficient calculation means 623 is further configured to calculate the time corresponding to the maximum amplitude value in each signal period according to the time corresponding to the maximum amplitude value of the periodic pulse transmission signal transmitted by the signal transmitter and the period duration of the signal period. And combining the preset acquisition frequency and the time of acquiring the maximum amplitude value of the reflected signal obtained by the processing device, calculating the phase of the reflection coefficient of each signal period; and setting the signal period according to the amplitude and phase of the reflection coefficient of each signal period. Reflection coefficient.

In this embodiment, since the pulse transmission signal transmitted by the signal transmitter 621 is periodic, when the pulse transmission signal is generated, the relevant parameters of the pulse transmission signal, such as the waveform, the period, are set in advance in the signal generator. , the maximum amplitude, etc. Therefore, the signal transmitter 621 can directly transmit the preset maximum amplitude of the periodic pulse transmission signal to the reflection coefficient calculation means 623 as the maximum amplitude value of the pulse transmission signal in each signal period. At this time, the time corresponding to the maximum amplitude of each periodic pulse transmission signal of the signal transmitter 621 may be determined as follows: at this time, the maximum amplitude value of the pulse transmission signal in the first signal period can be determined according to the waveform of the pulse signal. Corresponding time, and calculating the time corresponding to the maximum amplitude value in the remaining signal periods according to the time and the signal period duration.

Meanwhile, in the embodiment, the signal detecting circuit can also be disposed in the signal transmitter 621, so that when the signal transmitter 621 generates and transmits the periodic pulse transmitting signal, the periodic pulse transmitting signal can be detected and acquired in each signal period. The maximum amplitude value within. In addition, since the pulse transmission signal is periodic, the signal detection circuit can acquire only the maximum amplitude value in the first signal period as the maximum amplitude value of the pulse transmission signal in each signal period.

In the present embodiment, when the signal detecting circuit is disposed in the signal transmitter 621, the corresponding time can be determined when detecting the maximum amplitude value of the periodic pulse transmitting signal in each signal period. However, in actual operation, since the pulse transmission signal is a periodic signal, the time corresponding to the maximum amplitude value in each cycle also corresponds. Therefore, the signal detecting circuit can only acquire the time corresponding to the maximum amplitude value of the periodic pulse transmitting signal in the first signal period; and calculate the rest based on the time corresponding to the maximum amplitude value in the first signal period and the period duration of the signal period. The time corresponding to the maximum amplitude value in the signal period.

In this embodiment, in order to ensure the timeliness of the acquisition of the reflected signal data by the acquisition processing device 622, the data of the reflected signal may be simultaneously started when the signal transmitter 621 transmits the periodic pulse transmission signal. Since the reflected signal received by the acquisition processing device 622 is delayed compared to the pulsed signal, when the reflected signal is not returned, the data collected by the acquisition processing device 622 is characterized by a level of 0, after which the pulse in the reflected signal is acquired. The signal, and the corresponding 0-level signal thereafter. Therefore, for the data collected by the acquisition processing device 622, the start time of the collected data is the start time t _{0 of} the signal transmitter 621 transmitting the periodic pulse transmission signal; the acquisition processing device 622 is at the nth signal period. The maximum amplitude value of the internally collected reflected signal is the maximum amplitude value of the reflected signal data collected during the period from t ₀ +(n-1)T to t ₀ +nT. T represents the duration of the signal period.

Therefore, in order to ensure that the collected data of the signal transmitter 621 in each signal period includes the data of the pulse signal of the reflected signal, in the periodic pulse transmission signal, the transmission interval of the pulse signal must be greater than or equal to the received reflected signal and The delay between the transmission of the pulse transmission signal. In practical engineering applications, in the periodic pulse transmission signal, the transmission interval of the pulse signal is much larger than the delay between the received reflected signal and the transmitted pulse transmitted signal.

The delay between the received reflected signal and the transmitted pulse transmitted signal is obtained by the reflection coefficient calculating means 623 according to the time corresponding to the maximum amplitude value of the periodic pulse transmitting signal in each signal period and the time of the maximum amplitude value of the collected reflected signal. of. When the signal transmitter 621 transmits only the time corresponding to the maximum amplitude value of the periodic pulse transmission signal in the first signal period, the time corresponding to the maximum amplitude value of the pulse transmission signal in each of the remaining signal periods is determined by the reflection coefficient calculation means 623. The time corresponding to the maximum amplitude value in the first signal period and the duration of the signal period are calculated.

In the present embodiment, the periodic pulse transmission signal transmitted by the signal transmitter 621 may be a square wave pulse transmission signal. The square wave pulse transmitting signal has more than one point corresponding to the maximum amplitude value in one signal period, so the signal transmitter 621 can use the time when the amplitude value of the square wave pulse in the first signal period reaches the maximum amplitude value as the periodic pulse. The transmission signal is sent to the reflection coefficient calculation means 623 at a time corresponding to the maximum amplitude value in the first signal period, thereby determining the corresponding time of the maximum amplitude value in each signal period.

In practical applications, the signal transmitter 621 generates a square wave pulse until the time when the amplitude of the square wave pulse reaches the maximum amplitude value is very short, so the signal transmitter 621 can directly use the start time of transmitting the periodic pulse signal as the periodicity. The pulse transmission signal is sent to the reflection coefficient calculation means 623 at a time corresponding to the maximum amplitude value in the first signal period, thereby determining the corresponding time of the maximum amplitude value in each signal period.

In this embodiment, referring to FIG. 8, the acquisition processing device 622 includes a signal collector 6221 and a data processing unit 6222. The signal collector 6221 is responsible for collecting the relevant data in the reflected signal, and the data processing unit 6222 determines the maximum amplitude value in each signal period and the time corresponding to the maximum amplitude value in each signal period.

In this embodiment, the acquisition processing device 622 determines the maximum amplitude value in each signal period and determines the corresponding time for the collected reflected signal, by: collecting the periodic pulse emission by the signal collector 6221 according to the preset acquisition frequency. The amplitude value of the signal is recorded, and the sequence numbers of the acquired amplitude values are recorded; and the data processing unit 6222 compares the amplitude values corresponding to the sequence numbers collected in the same signal period to determine the reflection in each signal period. The maximum amplitude value of the signal is finally calculated according to the sequence number of the maximum amplitude value and the preset acquisition frequency in each signal period, and the time at which the maximum amplitude value of the reflected signal is collected in each signal period is calculated.

The sequence number of the data collected in this embodiment has a corresponding relationship with the preset acquisition frequency and the acquisition time. For example, the sequence number is 15, the preset acquisition frequency is 30 times/second, and the acquisition time is 0.5 seconds. Frequency × acquisition time = 15, which means that 15 times have been collected. The sequence number of the newly acquired data is 15. Based on the data acquisition unit 6222, the time corresponding to the acquired maximum amplitude value can be determined according to the formula acquisition time=sequence number ÷preset acquisition frequency, where the sequence number is the sequence number corresponding to the maximum amplitude value.

The data processing unit 6222 is to determine the data collected by the signal collector 6221 to determine if it was acquired in the same signal period. The determination can be performed by the sequence number of the record. For example, the preset acquisition frequency is 30 times/second, and the signal period duration is 5 seconds, indicating that one cycle is acquired 150 times, that is, starting from sequence number 1, each consecutive 150 sequence numbers. The corresponding data is in one signal period.

In this embodiment, in order to ensure the accuracy of the final calculation result, the data processing unit 622 may perform mean processing on the data of the reflected signals collected according to the preset acquisition frequency, thereby determining the amplitude of each collection point, and finally finding out the More accurate maximum amplitude during the signal period.

The data processing unit 6222 can calculate the average amplitude value of the acquired K consecutive number values of the sequence numbers in the same signal period, and then use the calculated average amplitude value as the smallest sequence number among the collected K sequence numbers. The amplitude value is finally compared with the amplitude values corresponding to the sequence numbers collected in the same signal period. At this time, the data processing unit 622 performs size comparison on the calculated average value.

In the present embodiment, as shown in FIG. 9, the data processing unit 6222 can be a single input, a K output shift register 91, and a K input adder 92 connected to the K outputs of the shift register 91, respectively. A first divider 93 connected to the K input adder 92 and a numerical comparator 94 connected to the first divider 93 are formed. among them:

The shift register 91 is arranged to input successive amplitude values of K sequence numbers located in the same signal period into the adder 92 through the K output terminals;

The adder 92 is arranged to sum the input K amplitude values, and send the result of the summation to the first divider 93;

The first divider 93 is arranged to calculate an amplitude average of the sum of the K amplitude values;

The numerical comparator 94 is arranged to receive the amplitude average calculated by the first divider 93 and compare the amplitude averages to determine the maximum amplitude value of the reflected signal during each of the signal periods. For example, the value comparator 94 compares the amplitude value of the previous sequence number with the amplitude value of the latter sequence number, discards the smaller one; continues to compare with the amplitude value of the latter sequence number, and so on, and finally retains The most significant value.

In order to reduce the task of the numerical comparator 94, the data whose amplitude average calculated by the first divider 93 is lower than the preset threshold may be directly discarded.

In this embodiment, referring to FIG. 10, the shift register 91 may be formed by a series of K D flip-flops 911, and each D flip-flop is set to output a signal input to the shift register by the signal collector 6221 when triggered. Amplitude value.

For example, the shift register 91 is composed of eight D flip-flops 911 connected in series. From the input end of the shift register 91, eight D flip-flops 911 are sequentially D1-D8, and the signal collector 6221 is sequentially input with eight amplitude values. A11-A18, when the signal collector 6211 inputs the first amplitude value A11, D1 outputs A11, D2-D8 has no output; when the signal collector 6221 inputs the second amplitude value A12, D1 outputs A11 to D2, D1 output A12, D2 output A11, D3-D8 no output; when the signal collector 6221 inputs the third amplitude value A13, D2 outputs A11 to D3, D1 outputs A12 to D2, D1 outputs A13, and D2 outputs A12. D3 output A11, D4-D8 has no output; and so on, finally when the signal collector 6211 inputs the eighth amplitude value A18, D1 outputs A18, D2 outputs A17, D3 outputs A16, ..., D8 outputs A11. When the signal collector 6221 continues to input the ninth amplitude value A19, the previously input A11 is discarded. At this time, D1 outputs A19, D2 outputs A18, D3 outputs A17, ..., and D8 outputs A12.

In the present embodiment, referring to FIG. 11, the reflection coefficient calculating means 623 may be constituted by a numerically controlled oscillator 6231 (NCO) and a second divider 6232. The second divider 6232 divides the maximum amplitude value of the reflected signal and the pulsed emission signal in each signal period to obtain the magnitude of the reflection coefficient. The digitally controlled oscillator 6231 is configured to calculate the real and imaginary parts of the phase of the emission coefficient in accordance with the time corresponding to the maximum amplitude value of the pulsed signal and the reflected signal in each signal period, in combination with the preset acquisition frequency.

In this embodiment, the vector standing wave ratio is finally calculated by the processor 61 of the remote radio unit based on the reflection coefficient calculated by the FPGA 62. However, the function of the processor 61 to calculate the vector standing wave ratio based on the reflection coefficient can also be implemented in the FPGA 62.

The remote radio unit provided in this embodiment includes an FPGA that can obtain a vector reflection coefficient, and directly transmits the maximum amplitude value of the transmitted signal and the reflected signal in each signal period to the reflection coefficient computing device through the signal transmitter and the acquisition processing device of the FPGA. So that the reflection coefficient calculation device directly calculates the amplitude of the reflection coefficient corresponding to each signal period; at the same time, directly transmits the transmitted signal and the reflected signal at the corresponding time of the maximum amplitude value of each signal period through the signal transmitter and the acquisition processing device of the FPGA. The reflection coefficient calculating means causes the reflection coefficient calculating means to directly calculate the phase of the reflection coefficient corresponding to each signal period, thereby reducing the amount of data required to acquire the vector standing wave ratio, simplifying the calculation process, and reducing the resources Demand. In the meantime, the remote radio unit provided in this embodiment can acquire the vector standing wave ratio by the FPGA and the processor, or even separately by the FPGA, so there is no need to set the DSP in the remote radio unit. Reduced costs.

Example four:

The present example exemplifies the solution of the embodiment of the present disclosure on the basis of the third example, taking a case where the signal transmitter 621 transmits a periodic square wave pulse transmission signal.

Referring to FIG. 12, FIG. 12 is a schematic structural diagram of an FPGA according to an embodiment of the present disclosure, including a signal transmitter 621, an acquisition processing device 622 including a signal collector 6221 and a data processing unit 6222, and a digital control oscillator 6231 and The reflection coefficient calculation means 623 of the second divider 6232.

The signal transmitter 621 transmits a periodic square wave pulse transmission signal, and the signal period duration is T, and the square wave pulse transmission signal starts time is t ₀ . The signal transmitter 621 transmits the start time t ₀ to the signal collector 6221 and the reflection coefficient calculation means 623, and transmits the set square wave pulse transmission signal amplitude A1 to the reflection coefficient calculation means 623.

The signal collector 6221 starts sampling with the time t ₀ as the starting time, and separately collects the data of the reflected signals in each signal period based on the signal period. In one cycle, the sequence number of the sampling point is N _sample = T × f, and f is the preset sampling frequency. In actual operation, there is a sampling point at t ₀ , that is, there is an initial sampling point, in order to ensure the accuracy of the calculation, that is, the sequence number of the initial sampling point in each period is 0. That is, the sampling point in the first period is N _sample +1. For the data collected in other signal periods after the first period, the data of the sampling point with the sequence number N _sample in the previous signal period is The sampled data of its starting point. In this embodiment, the sequence numbers of the sampling points are not repeated. For example, if 101 points are collected in one signal period, the sampling point sequence number is 0-100 in the first signal period, and the sampling points in the first signal period. The sequence number is 100-200. Note that for a sample point with sequence number 100, it is the last sample point in the first signal period and the initial sample point in the second signal period.

In this embodiment, the signal collector 6221 adds the amplitude of the sample point with the sequence number N and the amplitude of the 7 sample points after the point in the sampling process, and then averages the sample point with the sequence number N. The magnitude of the. Where N=0, 1, 2, .... If there are not enough 7 sample points after the Nth sampling point, then by complementing 0, the average is still averaged according to 8 data.

The data processing unit 6222 finds the maximum value in the data after the equalization processing, for example, compares one data with the smallest sequence number with the latter data, and discards if it is smaller than the previous number, and is retained if it is greater than the previous number. The previous number and its location information are discarded. By analogy, until the data of one cycle is compared, the last retained data is the amplitude A2 of the maximum point of the amplitude and its sequence number N _max . Thereafter, according to t ₁ +(n-1)T=N _max /f, the sampling time t ₁ +(n-1)T can be calculated, where n is the number of signal periods, indicating that the signal collector 6221 collects the first few Cycle data.

Thereafter, the data processing unit 6222 transmits A2 and the corresponding sampling time t ₁ +(n-1)T to the reflection coefficient calculating means 623, and the reflection coefficient calculating means 623 determines that the start time of the square wave pulse transmitting signal of the period is t ₀ + (n-1)T, input t ₀ +(n-1)T and t ₁ +(n-1)T into the digitally controlled oscillator 6231, and calculate the real part cos of the reflection coefficient (2πf(t ₁ - t ₀ )) and the imaginary part sin(2πf(t ₁ -t ₀ )).

At the same time, the reflection coefficient calculating means 623 also inputs the amplitude A1 of the square wave pulse transmitting signal and the maximum amplitude A2 of the collected reflected signal into the second divider 6232, and calculates the amplitude A2/A1 of the reflection coefficient.

In summary, by using the FPGA provided by the present disclosure, the vector reflection coefficient value is directly calculated by directly acquiring the square wave amplitude and the start time, and directly collecting the maximum amplitude value and the maximum amplitude value of the reflected signal, which makes the vector reflection coefficient value The algorithm for calculating the vector standing wave ratio detection is simpler, and the whole process is realized by FPGA, which does not require DSP intervention, simplifies the circuit and reduces the cost.

Those of ordinary skill in the art will appreciate that all or some of the steps, systems, and functional blocks/units of the methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be composed of several physical The components work together. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on a computer readable medium, which may include computer storage media (or non-transitory media) and communication media (or transitory media). As is well known to those of ordinary skill in the art, the term computer storage medium includes volatile and nonvolatile, implemented in any method or technology for storing information, such as computer readable instructions, data structures, program modules or other data. Sex, removable and non-removable media. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridge, magnetic tape, magnetic disk storage or other magnetic storage device, or may Any other medium used to store the desired information and that can be accessed by the computer. Moreover, it is well known to those skilled in the art that communication media typically includes computer readable instructions, data structures, program modules or other data in a modulated data signal, such as a carrier wave or other transport mechanism, and can include any information delivery media. .

The above is a detailed description of the present disclosure in connection with the exemplary embodiments, and the implementation of the present disclosure is not limited to the description. It will be apparent to those skilled in the art that the present invention can be made in the scope of the present disclosure without departing from the scope of the present disclosure.

Claims

A vector standing wave ratio acquisition method includes:

Obtaining a maximum amplitude value of the periodic pulse transmission signal in each signal period (S101), and acquiring a maximum amplitude value of the reflected signal of the periodic pulse transmission signal in each signal period according to a preset acquisition frequency (S102) ;

Obtaining a delay corresponding to the periodic pulse transmission signal and the reflection signal in each signal period (S103);

Obtaining an amplitude of a reflection coefficient corresponding to each signal period according to a maximum amplitude value of the periodic pulse transmission signal and the reflection signal in each signal period (S104), and according to the acquisition frequency and a delay corresponding to each signal period Obtaining a phase of the reflection coefficient corresponding to each signal period (S105);

Determining the reflection coefficient corresponding to each signal period according to the amplitude and phase of the reflection coefficient corresponding to each signal period (S106), and acquiring a vector corresponding to each signal period according to the reflection coefficient corresponding to each signal period Standing wave ratio (S107).
The vector standing wave ratio acquisition method according to claim 1, wherein the obtaining a time delay corresponding to the periodic pulse transmission signal and the reflection signal in each signal period (S103) comprises:

Obtaining a time corresponding to a maximum amplitude value of the periodic pulse transmission signal in each signal period;

Obtaining a time corresponding to a maximum amplitude value of the reflected signal in each signal period;

And determining, according to a time corresponding to a maximum amplitude value of the reflected signal in each signal period and a time corresponding to a maximum amplitude value of the periodic pulse transmission signal, acquiring the periodic pulse transmission signal and the reflection signal in each signal period. Delay.
The vector standing wave ratio acquisition method according to claim 2, wherein the acquiring the time corresponding to the maximum amplitude value of the periodic pulse transmission signal in each signal period comprises:

Obtaining a time corresponding to a maximum amplitude value of the periodic pulse transmission signal in the first signal period;

The time corresponding to the maximum amplitude value in the remaining signal periods is calculated based on the time corresponding to the maximum amplitude value in the first signal period and the period duration of the signal period.
The vector standing wave ratio acquisition method according to claim 3, wherein the periodic pulse transmission signal is a square wave;

The acquiring the time corresponding to the maximum amplitude value of the periodic pulse transmission signal in the first signal period includes:

Obtaining, in a first signal period, a time when the amplitude value of the square wave reaches a maximum amplitude value as a time corresponding to a maximum amplitude value of the periodic pulse transmission signal in a first signal period;

or,

The start time of the square wave is obtained as the time corresponding to the maximum amplitude value of the periodic pulse transmission signal in the first signal period.
The vector standing wave ratio acquisition method according to any one of claims 2 to 4, wherein the maximum amplitude value of the reflected signal of the periodic pulse transmission signal is acquired in each signal period according to a preset acquisition frequency ( S102) includes:

Collecting the amplitude value of the reflected signal according to a preset acquisition frequency (S401), and recording the sequence number of each amplitude value collected (S402);

Amplifying the amplitude values corresponding to each sequence number acquired in the same signal period (S403), determining a maximum amplitude value of the reflected signal in each of the signal periods (S404);

The obtaining the time corresponding to the maximum amplitude value of the reflected signal in each signal period includes:

And calculating a time at which the maximum amplitude value of the reflected signal is acquired in each of the signal periods according to a sequence number of a maximum amplitude value in each of the signal periods and the preset acquisition frequency (S405).
The vector standing wave ratio acquisition method according to claim 5, wherein said comparing magnitude values corresponding to each sequence number acquired in the same signal period (S403) comprises:

Calculating an average amplitude value of the acquired amplitude values of the K consecutive numbers in the same signal period, and using the average amplitude value as the amplitude value corresponding to the smallest sequence number among the collected K sequence numbers;

The amplitude values corresponding to each sequence number acquired in the same signal period are compared in size.
A field programmable gate array FPGA (62) comprising: a signal transmitter (621), an acquisition processing device (622), and a reflection coefficient calculation device (623);

The signal transmitter (621) is configured to transmit a periodic pulse transmission signal and to a maximum amplitude value of the periodic pulse transmission signal in each signal period, and the periodic pulse transmission signal is in a first signal The time corresponding to the maximum amplitude value in the period is sent to the reflection coefficient computing device (623);

The acquisition processing device (622) is configured to collect a reflected signal of the periodic pulse transmission signal according to a preset acquisition frequency when the signal transmitter (621) transmits a periodic pulse transmission signal in each of the signal periods a maximum amplitude value within, and obtaining a time at which the maximum amplitude value of the reflected signal is acquired during each of the signal periods;

The reflection coefficient calculation means (623) is configured to calculate a magnitude of a reflection coefficient of each signal period according to a maximum amplitude value of the periodic pulse transmission signal and a maximum amplitude value of the reflected signal in each of the signal periods;

The reflection coefficient calculation means (623) is further configured to: time according to a maximum amplitude value of the periodic pulse transmission signal transmitted by the signal transmitter (621) in a first signal period, and the signal period The period of time is calculated for the time corresponding to the maximum amplitude value in each of the signal periods, and combined with the preset acquisition frequency and the time of the maximum amplitude value of the reflected signal obtained by the acquisition processing device (622), each signal period is calculated. a phase of the reflection coefficient; and a reflection coefficient determined for each signal period based on an amplitude and a phase of a reflection coefficient of each signal period.
The FPGA (62) of claim 7, wherein said acquisition processing means (622) comprises: a signal collector (6221) and a data processing unit (6222);

The signal collector (6221) is configured to collect an amplitude value of the periodic pulse transmission signal according to a preset acquisition frequency, and record a sequence number of each amplitude value collected;

The data processing unit (6222) is configured to compare magnitude values corresponding to each sequence number acquired in the same signal period, and determine a maximum amplitude value of the reflected signal in each of the signal periods, and according to A sequence number of the maximum amplitude value in each of the signal periods and the preset acquisition frequency, and a time at which the maximum amplitude value of the reflected signal is acquired in each of the signal periods.
The FPGA (62) of claim 8 wherein said data processing unit (6222) is arranged to compare the magnitudes of the amplitude values corresponding to each sequence number acquired during the same signal period comprising:

The data processing unit (6222) is configured to calculate an average amplitude value of the acquired K consecutive number values of the sequence numbers in the same signal period, and use the average amplitude value as the collected K sequence numbers. The amplitude value corresponding to the minimum sequence number; and the magnitude values corresponding to each sequence number acquired in the same signal period are compared in size.
A remote radio unit comprising: a processor (61), and the FPGA (62) according to any one of claims 7-9 connected to the processor;

The FPGA (62) is configured to transmit a periodic pulse transmission signal and calculate a reflection coefficient of the periodic pulse transmission signal in each signal period;

The processor is configured to calculate a vector of the periodic pulse transmission signal in each signal period according to a reflection coefficient of the periodic pulse transmission signal calculated by the FPGA (62) in each signal period. Bobby.
A vector standing wave ratio obtaining device includes a data acquiring module (51) and a processing module (52), wherein:

The data acquisition module (51) is configured to acquire a maximum amplitude value of the periodic pulse transmission signal in each signal period, and collect a reflection signal of the periodic pulse transmission signal according to a preset acquisition frequency in each signal period. a maximum amplitude value; and a delay set corresponding to the periodic pulsed emission signal and the reflected signal in each signal period;

The processing module 52 is configured to obtain an amplitude of a reflection coefficient corresponding to each signal period according to a maximum amplitude value of the periodic pulse transmission signal and the reflection signal in each signal period, and according to the acquisition frequency and each signal period Corresponding delays acquire phases corresponding to the reflection coefficients of each signal period, thereby determining the reflection coefficients corresponding to each signal period; and setting to acquire corresponding signals according to the reflection coefficients corresponding to each signal period The periodic vector standing wave ratio.
A computer readable storage medium storing computer executable instructions that, when executed by a processor, implement the method of any of claims 1-6.