WO2022134995A1

WO2022134995A1 - Time delay adjustment method and apparatus, and storage medium and electronic apparatus

Info

Publication number: WO2022134995A1
Application number: PCT/CN2021/132530
Authority: WO
Inventors: 程润虹; 王子越; 胡安稳; 龚晓亮; 刘欢
Original assignee: 中兴通讯股份有限公司
Priority date: 2020-12-21
Filing date: 2021-11-23
Publication date: 2022-06-30
Also published as: CN114726727A

Abstract

Provided are a time delay adjustment method and apparatus, and a storage medium and an electronic apparatus. The method comprises: determining a cross-correlation value between a multi-channel transmission signal and a multi-channel feedback signal in a digital-analog hybrid circuit; determining a relative time delay between the transmission signal and the feedback signal according to the cross-correlation value; and adjusting the relative time delay. The problems of the measurement and adjustment of a relative time delay in the related art not being applicable for a digital-analog hybrid circuit, the measurement time being relatively long, and the adjustment accuracy being relatively low can be solved. The measurement and adjustment of a relative time delay between a transmission signal and a feedback signal, which are in a correlation, in a digital-analog hybrid circuit is realized, the measurement time is short, and the adjustment accuracy is high.

Description

A delay adjustment method, device, storage medium and electronic device

technical field

The embodiments of the present application relate to the field of communication technologies, and in particular, to a method, device, storage medium, and electronic device for adjusting time delay.

Background technique

When a signal passes through a certain transmission system or network, the output signal will inevitably have a certain time delay relative to the input signal. For communication systems, the transmission delay characteristic largely determines the linear distortion of the transmitted signal. Furthermore, the measurement of distance often relies on the measurement of time delay. Therefore, the measurement accuracy of transmission delay plays a key role in many fields such as aerospace measurement and control, navigation and positioning, and digital communication.

In recent years, with the rapid development and wide application of electronic technology, many new signal transmission systems have appeared. The measurement theory and measurement method of time delay are becoming more and more perfect, and various measurement instruments have come out one after another. At present, the measurement of time delay can be mainly classified into the measurement in the time domain and the measurement in the frequency domain according to its basic principle. Time-domain delay measurement is a relatively traditional measurement method, and it has been used until now. Typical examples include time interval counters, optical time-domain reflectometers, etc. The main principle is to introduce time delay by transmitting pulse signals, and measure the time interval before and after transmission. , limited by the nonlinear effect and pulse width of the transmission system, the measurement method has low precision and small measurement range; thus the frequency domain delay measurement emerges as the times require, the most commonly used is the network analyzer, and its measurement principle is based on the system The phase-frequency response curve is obtained to obtain the group delay characteristics, while the vector signal analyzer uses the Fourier transform and cross-correlation operation of the two channels to determine the signal delay difference from the peak position of the correlation value, and the time delay in the frequency domain. Extended measurement has higher accuracy and greater range, but the system is usually more complex and more tedious to operate. At the same time, with the emergence of more and more diverse transmission systems and working modes, higher requirements have been placed on the accuracy of time delay measurement and the diversification of testing methods.

In the prior art, the method for measuring and adjusting the relative time delay of the calibration signal has the following disadvantages:

There are few applicable signal types, most of which are for pure digital circuit systems, and are not suitable for time delay measurement of digital and analog mixed circuits;

The measurement time is long, the real-time adjustment is poor, and the measurement often uses the upper computer for cross-correlation calculation, which takes a long time;

The adjustment precision is relatively low, and the prior art usually can only adjust the delay of the sample point or the clock level, and there is no delay adjustment less than the clock level.

No solution has been proposed for the problems that the relative time delay measurement and adjustment in the related art cannot be applied to digital and analog mixed circuits, and the measurement time is long and the adjustment accuracy is low.

SUMMARY OF THE INVENTION

The embodiments of the present application provide a time delay adjustment method, device, storage medium and electronic device, so as to at least solve the problem that the measurement and adjustment of relative time delay cannot be applied to digital and analog mixed circuits, and the measurement time is long and the adjustment accuracy is low The problem.

According to an embodiment of the present application, a time delay adjustment method is provided, including:

Determine the cross-correlation value of the multi-channel transmission signal and the feedback signal in the digital-analog hybrid circuit;

determining the relative time delay between the transmitted signal and the feedback signal according to the cross-correlation value;

The relative delay is adjusted.

In an exemplary embodiment, determining the cross-correlation value of the multi-channel transmission signal and the feedback signal in the digital-analog hybrid circuit includes:

A cross-correlation operation is performed on the transmitted signal and the feedback signal to obtain the cross-correlation value.

In an exemplary embodiment, performing a cross-correlation operation on the transmission signal and the feedback signal to obtain the cross-correlation value includes:

Determine the power accumulation value of the transmission signal, the power accumulation value of the feedback signal, and the complex multiplication accumulation value of the conjugate data of the transmission signal and the feedback signal according to the preconfigured data block length;

determining the product of the power accumulation value of the transmitted signal and the power accumulation value of the feedback signal, and taking the square root of the product to obtain the square root value of the product;

The cross-correlation value is determined as the ratio of the complex multiplication and accumulation value of the conjugate data to the square root value of the product.

In an exemplary embodiment, adjusting the relative delay includes:

Time delay alignment processing is performed on the transmit signal and the feedback signal according to the relative time delay.

In an exemplary embodiment, performing time delay alignment processing on the transmit signal and the feedback signal according to the relative time delay includes:

Based on the pre-configured sample delay and clock delay, delay adjustment is performed on the transmit signal according to the relative delay;

Based on a preconfigured delay filter coefficient, the feedback signal is adjusted with a delay of less than 1 clock according to the relative delay.

In an exemplary embodiment, determining the relative time delay between the transmission signal and the feedback signal according to the cross-correlation value includes:

The relative time delay between the transmitted signal and the feedback signal is determined according to the peak position of the cross-correlation value.

According to another embodiment of the present application, a delay adjustment device is also provided, including:

a first determining module, configured to determine the cross-correlation value of the multi-channel transmission signal and the feedback signal in the digital-analog hybrid circuit;

a second determining module, configured to determine the relative time delay between the transmitted signal and the feedback signal according to the cross-correlation value;

An adjustment module, configured to adjust the relative time delay.

In an exemplary embodiment, the first determining module is further configured to

In an exemplary embodiment, the first determining module includes:

The first determination submodule is configured to determine the power accumulation value of the transmission signal, the power accumulation value of the feedback signal, and the complex data of the conjugate data of the transmission signal and the feedback signal according to a preconfigured data block length. multiply the accumulated value;

The second determination submodule is configured to determine the product of the power accumulation value of the transmitted signal and the power accumulation value of the feedback signal, and to perform the square root of the product to obtain the square root value of the product;

The third determination submodule is configured to determine the ratio of the complex multiplication and accumulation value of the conjugate data to the square root value of the product as the cross-correlation value.

In an exemplary embodiment, the adjustment module is further configured to

In an exemplary embodiment, the adjustment module includes:

a first adjustment sub-module, configured to perform delay adjustment on the transmitted signal according to the relative delay based on the preconfigured sample delay and clock delay;

The second adjustment sub-module is configured to perform a delay adjustment of less than 1 clock on the feedback signal according to the relative delay based on a preconfigured delay filter coefficient.

In an exemplary embodiment, the second determining module is further configured to

According to yet another embodiment of the present application, a computer-readable storage medium is also provided, where a computer program is stored in the storage medium, wherein the computer program is configured to execute any one of the above method embodiments when running steps in .

According to yet another embodiment of the present application, an electronic device is also provided, comprising a memory and a processor, wherein a computer program is stored in the memory, and the processor is configured to run the computer program to execute any one of the above steps in a method embodiment.

In this embodiment of the present application, the cross-correlation value of the multi-channel transmission signal and the feedback signal in the digital-analog hybrid circuit is determined; the relative time delay between the transmission signal and the feedback signal is determined according to the cross-correlation value; It can solve the problem that the relative delay measurement and adjustment in the related art cannot be applied to digital and analog mixed circuits, and the measurement time is long and the adjustment accuracy is low, and the related transmission in the digital-analog mixed circuit is realized. The measurement and adjustment of the relative time delay between the signal and the feedback signal, the measurement time is short and the adjustment precision is high.

Description of drawings

1 is a flowchart of a method for adjusting time delay according to the present embodiment;

2 is a schematic diagram of relative delay measurement and adjustment with a multi-channel digital-analog hybrid circuit according to the present embodiment;

3 is a schematic diagram of routing according to the present embodiment;

4 is a schematic diagram 1 of cross-correlation calculation according to the present embodiment;

5 is a schematic diagram 2 of cross-correlation calculation according to the present embodiment;

FIG. 6 is a schematic diagram of coarse delay alignment according to the present embodiment;

7 is a schematic diagram of fine delay filtering according to the present embodiment;

FIG. 8 is a block diagram of a delay adjustment apparatus according to the present embodiment.

Detailed ways

Hereinafter, the embodiments of the present application will be described in detail with reference to the accompanying drawings and in conjunction with the embodiments.

It should be noted that the terms "first", "second", etc. in the description and claims of the present application and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence.

According to an embodiment of the present application, a method for adjusting time delay is provided. FIG. 1 is a flowchart of the method for adjusting time delay according to this embodiment. As shown in FIG. 1 , the method includes:

Step S102, determine the cross-correlation value of the multi-channel transmission signal and the feedback signal in the digital-analog hybrid circuit;

In this embodiment, the above step S102 may specifically include: performing a cross-correlation operation on the transmission signal and the feedback signal to obtain the cross-correlation value, and further, determining the transmission signal according to a preconfigured data block length. The power accumulation value, the power accumulation value of the feedback signal, and the complex multiplication accumulation value of the conjugate data of the transmission signal and the feedback signal; determine the power accumulation value of the transmission signal and the power accumulation of the feedback signal The value of the product of the multiplication value, and the square root of the product is performed to obtain the square root value of the product; the ratio of the complex multiplication and accumulation value of the conjugate data to the square root value of the product is determined as the cross-correlation value. .

Step S104, determining the relative time delay between the transmitted signal and the feedback signal according to the cross-correlation value;

In this embodiment, the foregoing step S104 may specifically include: determining the relative time delay between the transmission signal and the feedback signal according to the peak position of the cross-correlation value. Specifically, the cross-correlation value can be calculated by hardware calculation and reported to the software. The software uses the hardware to calculate the cross-correlation value and compare it with the software threshold. If the hardware cross-correlation value is greater than or equal to the software threshold, it can be considered that the transmission and feedback data have no delay, otherwise it needs to be Reconfigure the coarse delay alignment and fine delay alignment.

Step S106, adjusting the relative time delay.

In this embodiment, the above step S106 may specifically include: performing a delay alignment process on the transmission signal and the feedback signal according to the relative delay, and further, based on the preconfigured sample delay and clock delay, Delay adjustment is performed on the transmission signal according to the relative delay; based on a preconfigured delay filter coefficient, delay adjustment is performed on the feedback signal less than 1 clock according to the relative delay.

In this embodiment, the cross-correlation operation is performed on the multi-channel transmission and feedback data in the digital-analog hybrid circuit, and the relative delay difference between the transmission and the feedback signal is determined from the peak position of the correlation value, and the delay difference is adjusted at the same time. According to the characteristics of the digital-analog hybrid circuit, the method of calculating the cross-correlation of the transmission and feedback data is used to measure and adjust the relative time delay; the design of a cross-correlation calculation module for time-division multiplexing of the transmission and reflection data of multiple channels is adopted to improve the single Real-time channel adjustment, while saving hardware resources; two-level adjustment is adopted, coarse delay adjustment is used for sample point level and clock level adjustment, and fine delay filter adjustment is used for clock level adjustment.

In the intermediate frequency system, the transmitted signal is sampled by a digital-to-analog converter (DAC) after being processed by a digital circuit, and then given to the power amplifier. -Digital Converter (abbreviated as ADC) is sampled and then sent to the IF system for internal processing. These two sets of signals are the transmit and feedback signals. These two sets of signals need to be aligned in terms of delay during subsequent processing. The present application belongs to frequency-domain time delay measurement. The cross-correlation operation is performed on the transmission and feedback data of multiple channels in a digital-analog hybrid circuit, and the relative time delay difference between the transmission and feedback signals is determined by the peak position of the correlation value. Delay adjustment. According to the characteristics of the digital-analog hybrid circuit, the method of calculating the cross-correlation of the transmission and feedback data is used to measure and adjust the relative time delay; the design of a cross-correlation calculation module for time-division multiplexing of the transmission and reflection data of multiple channels is adopted to improve the single Real-time channel adjustment, while saving hardware resources; two-level adjustment is adopted, coarse delay adjustment is used for sample point level and clock level adjustment, and fine delay filter adjustment is used for adjustment in clock level.

FIG. 2 is a schematic diagram of relative delay measurement and adjustment with a multi-channel digital-analog hybrid circuit according to the present embodiment. As shown in FIG. 2, it includes 32 transmit channel inputs and 8 feedback channel inputs, wherein the data of the feedback channel It is a digital signal, and the analog signal output by the power amplifier is the data sampled by the analog-to-digital converter, that is, the ADC, that is, the process of converting the analog signal to the digital signal. It consists of 1 routing, 1 cross-correlation calculation, 1 coarse delay alignment, fine delay filtering and CPU configuration. Correlation calculation, fine delay filtering and coarse delay alignment are configured accordingly. The cross-correlation calculation is responsible for calculating the cross-correlation value of the transmitted and feedback data and reporting it to the CPU for configuration. The coarse delay alignment is responsible for delaying the transmitted data at the sample level and the clock level, so that the transmitted data is aligned with the feedback data at the sample level and the clock level. The fine delay filtering is responsible for adjusting the feedback data whose delay is less than the clock level introduced by the transmitted data through the analog link.

CPU configuration, routing configuration based on 32 transmit channels and 8 feedback channels required to be supported. Configure the length of the data block for the cross-correlation calculation, and receive the normalized cross-correlation value reported by the cross-correlation calculation at the same time. Coarse delay alignment and fine delay filtering are configured according to the reported normalized cross-correlation value, so that the subsequently reported normalized cross-correlation value meets the requirements. At this time, the currently processed transmit channel and feedback channel data completes the delay Alignment operation.

FIG. 3 is a schematic diagram of routing according to the present embodiment. As shown in FIG. 3, routing, according to the configuration of the CPU, completes the round-robin of 32 transmission channels and 8 feedback channels, based on the transmission channel selection signal, from 32 transmission channels The transmission channel N is determined by selecting among the channels; based on the feedback channel selection information, the feedback channel M is selected from the 8 feedback channels. .

4 is a schematic diagram 1 of cross-correlation calculation according to the present embodiment, and FIG. 5 is a schematic diagram of a second cross-correlation calculation according to the present embodiment, as shown in FIGS. The cumulative value of the transmit power of the transmitted data, the cumulative value of the feedback power of the feedback data, and the value of the transmitted feedback conjugate complex multiplied and accumulated real part of the conjugate data of the transmitted data and the feedback data, and then divided by the transmitted feedback conjugate complex multiplied and accumulated real part value The normalized cross-correlation value is obtained by taking the square root of the product of the cumulative value of the transmit power and the cumulative value of the feedback power. The calculation formula is as follows:

Among them, Corr_xy is the normalized cross-correlation value of transmission and feedback, Pxy is the real part of the conjugate complex multiplication and accumulation value of transmission and feedback, Px, Py are the power accumulation value of transmission and feedback data, respectively, transmission fwd, feedback fb signal Both are complex signals, and the formula for single-point complex multiplication is:

After the single-point multiplication, only the real part needs to be taken.

FIG. 6 is a schematic diagram of coarse delay alignment according to the present embodiment. As shown in FIG. 6 , the coarse delay alignment is performed according to the sample delay configuration and clock and configuration configured by the CPU to delay the transmission data, and the input transmission is delayed. Data, according to the coarse delay value configured by the CPU and the clock delay stage delay, the aligned data is obtained, that is, the transmitted data is output.

FIG. 7 is a schematic diagram of the fine delay filtering according to the present embodiment. As shown in FIG. 7 , in the fine delay filtering, the feedback data is subjected to less than clock level filtering according to the fine delay filtering filter coefficients (ie filter coefficients) configured by the CPU. delay adjustment. By configuring the coefficient of the fine delay filter by the CPU, the delay from 1/8 of the clock to 7/8 of the clock can be performed, and the minimum clock delay unit can be adjusted by changing the order of the fine delay filter. By configuring the coarse delay value of the CPU to ensure that the read and write addresses of the RAM maintain the configured address difference, the absolute delay difference of the sample level between the write data and the read data can be guaranteed. At the same time, the value of the RAM is read as the clock level For the beat, the same can be selected by configuring the CPU to read the RAM value or the value after the beat.

In this embodiment, the normalized cross-correlation value can be calculated for the transmission and feedback data input by multiple channels in the digital-analog hybrid circuit, and the coarse delay and fine delay configuration can be configured through the CPU in time, so that the transmission and feedback data are delayed in time. extended alignment. The delay adjustment process may specifically include;

Step 1, the CPU determines the transmit and feedback channels that need to be polled currently, and performs routing configuration of the transmit and feedback channels.

Step 2, configure the coarse delay alignment and the fine delay filtering according to the empirical value.

Step 3: Configure the cross-correlation calculation according to the size of the data block required to perform the cross-correlation calculation.

Step 4, the CPU judges whether the normalized cross-correlation value reported by the cross-correlation calculation meets the requirements.

Step 5, if the normalized cross-correlation value meets the requirements, complete the relative delay adjustment, and perform step 1 at the same time; otherwise, perform step 2 again.

This embodiment can be applied to a system that is a pure digital circuit or a digital-analog hybrid circuit between two or more groups of signals with correlation, to adjust and measure the relative time delay.

According to another embodiment of the present application, a delay adjustment apparatus is also provided. FIG. 8 is a block diagram of the delay adjustment apparatus according to this embodiment, as shown in FIG. 8 , including:

The first determination module 82 is configured to determine the cross-correlation value of the multi-channel transmission signal and the feedback signal in the digital-analog hybrid circuit;

The second determining module 84 is configured to determine the relative time delay between the transmitted signal and the feedback signal according to the cross-correlation value;

The adjustment module 86 is configured to adjust the relative time delay.

In an exemplary embodiment, the first determining module 82 is further configured to

In an exemplary embodiment, the first determining module 82 includes:

In an exemplary embodiment, the adjustment module 86 is further configured to

In an exemplary embodiment, the adjustment module 86 includes:

In an exemplary embodiment, the second determining module 84 is further configured to

Embodiments of the present application further provide a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, wherein the computer program is configured to execute the steps in any of the above method embodiments when running.

In an exemplary embodiment, the above-mentioned computer-readable storage medium may include, but is not limited to, a USB flash drive, a read-only memory (Read-Only Memory, referred to as ROM for short), and a random access memory (Random Access Memory, referred to as RAM for short) , mobile hard disk, magnetic disk or CD-ROM and other media that can store computer programs.

Embodiments of the present application further provide an electronic device, including a memory and a processor, where a computer program is stored in the memory, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments.

In an exemplary embodiment, the above-mentioned electronic device may further include a transmission device and an input-output device, wherein the transmission device is connected to the above-mentioned processor, and the input-output device is connected to the above-mentioned processor.

For specific examples in this embodiment, reference may be made to the examples described in the foregoing embodiments and exemplary implementation manners, and details are not described herein again in this embodiment.

Obviously, those skilled in the art should understand that the above-mentioned modules or steps of the present application can be implemented by a general-purpose computing device, and they can be centralized on a single computing device or distributed in a network composed of multiple computing devices On the other hand, they can be implemented in program code executable by a computing device, so that they can be stored in a storage device and executed by the computing device, and in some cases, can be performed in a different order than shown here. Or the described steps, or they are respectively made into individual integrated circuit modules, or a plurality of modules or steps in them are made into a single integrated circuit module to realize. As such, the present application is not limited to any particular combination of hardware and software.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the principles of this application shall be included within the protection scope of this application.

Claims

A delay adjustment method, comprising:

Determine the cross-correlation value of the multi-channel transmission signal and the feedback signal in the digital-analog hybrid circuit;

determining the relative time delay between the transmitted signal and the feedback signal according to the cross-correlation value;

The relative delay is adjusted.
The method according to claim 1, wherein determining the cross-correlation value of the multi-channel transmission signal and the feedback signal in the digital-analog hybrid circuit comprises:

A cross-correlation operation is performed on the transmitted signal and the feedback signal to obtain the cross-correlation value.
The method according to claim 2, wherein performing a cross-correlation operation on the transmitted signal and the feedback signal to obtain the cross-correlation value comprises:

Determine the power accumulation value of the transmission signal, the power accumulation value of the feedback signal, and the complex multiplication accumulation value of the conjugate data of the transmission signal and the feedback signal according to the preconfigured data block length;

determining the product of the power accumulation value of the transmitted signal and the power accumulation value of the feedback signal, and taking the square root of the product to obtain the square root value of the product;

The cross-correlation value is determined as the ratio of the complex multiplication and accumulation value of the conjugate data to the square root value of the product.
The method of claim 1, wherein adjusting the relative delay comprises:

Time delay alignment processing is performed on the transmit signal and the feedback signal according to the relative time delay.
The method according to claim 4, wherein performing time delay alignment processing on the transmission signal and the feedback signal according to the relative time delay comprises:

Based on the pre-configured sample delay and clock delay, delay adjustment is performed on the transmit signal according to the relative delay;

Based on a preconfigured delay filter coefficient, the feedback signal is adjusted with a delay of less than 1 clock according to the relative delay.
The method according to any one of claims 1 to 5, wherein determining the relative time delay between the transmitted signal and the feedback signal according to the cross-correlation value comprises:

The relative time delay between the transmitted signal and the feedback signal is determined according to the peak position of the cross-correlation value.
A delay adjustment device, comprising:

a first determining module, configured to determine the cross-correlation value of the multi-channel transmission signal and the feedback signal in the digital-analog hybrid circuit;

a second determining module, configured to determine the relative time delay between the transmitted signal and the feedback signal according to the cross-correlation value;

An adjustment module, configured to adjust the relative time delay.
The device according to claim 7, wherein the first determining module is further configured to

Perform a cross-correlation operation on the transmitted signal and the feedback signal to obtain the cross-correlation value.
A computer-readable storage medium in which a computer program is stored, wherein the computer program is configured to execute the method of any one of claims 1 to 6 when run.
An electronic device comprising a memory and a processor with a computer program stored in the memory, the processor being arranged to run the computer program to perform the method of any one of claims 1 to 6.