阅读说明：本技术 基于信号分析仪实现5g信号发射调制质量测量的方法 (Method for realizing 5G signal emission modulation quality measurement based on signal analyzer ) 是由 徐林 王明果 于 2019-10-22 设计创作，主要内容包括：本发明涉及一种基于信号分析仪实现5G信号发射调制质量测量的方法,包括以下步骤：触发抖动补偿,信号输入；根据输入参数,对接收到的信号进行傅里叶变换；采样抖动补偿；提取各信道的参考信号进行信道估计,并进行信道均衡操作；进行相位补偿；测量信号发射调制质量。采用了本发明的基于信号分析仪实现5G信号发射调制质量测量的方法,通过引入触发抖动补偿、采样抖动补偿以及相位补偿等多个模块降低传输带来的误差,大大提高了分析仪对信号发射调制质量测量的准确度。本发明针对于分析仪对5G信号的处理,在传统机制上添加触发抖动补偿、采样抖动补偿以及相位补偿等模块进而实现了分析仪测量信号发射调制质量准确度的提高。(The invention relates to a method for realizing 5G signal emission modulation quality measurement based on a signal analyzer, which comprises the following steps: triggering jitter compensation and inputting signals; performing Fourier transform on the received signal according to the input parameters; compensating sampling jitter; extracting reference signals of each channel to carry out channel estimation and carrying out channel equalization operation; performing phase compensation; the signal emission modulation quality is measured. By adopting the method for realizing the 5G signal emission modulation quality measurement based on the signal analyzer, the error caused by transmission is reduced by introducing a plurality of modules such as trigger jitter compensation, sampling jitter compensation, phase compensation and the like, and the accuracy of the signal emission modulation quality measurement of the analyzer is greatly improved. Aiming at the processing of the 5G signal by the analyzer, modules such as trigger jitter compensation, sampling jitter compensation, phase compensation and the like are added on the traditional mechanism, so that the accuracy of the transmission modulation quality of the signal measured by the analyzer is improved.)

1. A method for realizing 5G signal emission modulation quality measurement based on a signal analyzer is characterized by comprising the following steps:

(1) triggering jitter compensation and inputting signals;

(2) performing Fourier transform on the received signal according to the input parameters;

(3) compensating sampling jitter;

(4) extracting reference signals of each channel to carry out channel estimation and carrying out channel equalization operation;

(5) performing phase compensation;

(6) the signal emission modulation quality is measured.

2. The method for realizing 5G signal emission modulation quality measurement based on the signal analyzer as claimed in claim 1, wherein the step (1) specifically comprises the following steps:

(1.1) inputting parameters and calculating a starting point of the time domain position of the PSS No. 0;

(1.2) extracting data in an input signal range, and performing sliding correlation on the extracted data and local time domain data;

(1.3) judging whether the correlation value exceeds a threshold value, if so, continuing the step (1.4); otherwise, the input signal is not matched with the configuration parameters, no compensation is carried out, and the step is exited;

(1.4) calculating the peak position of the correlation value and calculating the trigger jitter amount;

(1.5) judging whether the trigger jitter amount is 0, if so, not performing any compensation, and exiting the step; otherwise, the trigger jitter amount is issued to the FPGA for trigger jitter compensation.

3. The method for realizing 5G signal emission modulation quality measurement based on the signal analyzer as claimed in claim 1, wherein the step (3) specifically comprises the following steps:

(3.1) extracting PSS frequency domain data, and performing conjugate multiplication on the PSS frequency domain data and a local code;

(3.2) carrying out conjugate multiplication on the front half section and the rear half section, and calculating the jitter amount of the sampling clock;

and (3.3) compensating the jitter of the sampling clock.

4. The method for implementing 5G signal emission modulation quality measurement based on the signal analyzer as claimed in claim 1, wherein the step (5) specifically comprises the following steps:

(5.1) determining a tuning mode according to the input parameters, and calculating a reference point;

(5.2) judging whether the Euclidean distance between the equalized data and the reference point is less than 0.01, and if so, recording the equalized data as a sample point; otherwise, not processing, and exiting the step;

(5.3) calculating 8 powers of all sample points and summing;

and (5.4) calculating the phase deflection amount and performing phase compensation on the equalized data.

5. The method of claim 2, wherein the input signal range in step (1.2) is [ position1-symbol _ len/2, position1+ symbol _ len/2], wherein position1 is the starting point of PSS time domain position No. 0, and symbol _ len is the length of one OFDM symbol.

6. The method for implementing 5G signal transmission modulation quality measurement based on the signal analyzer as claimed in claim 2, wherein the step (1.4) of calculating the trigger jitter amount specifically comprises:

the amount of trigger jitter is calculated according to the following equation:

trigger jitter amount position2-position 1;

the position1 is the starting point of the time domain position of PSS 0, and the position2 is the peak position of the correlation value.

Technical Field

The invention relates to the field of communication, in particular to the field of 5G signal modulation, and specifically relates to a method for realizing 5G signal emission modulation quality measurement based on a signal analyzer.

Background

In the fields of wireless communication, satellite communication, radar and the like, digital baseband, intermediate frequency, radio frequency vector signals and modulation signals need to be analyzed, and a signal analyzer is generated accordingly.

The main purpose of the signal analyzer is to accurately measure the transmit modulation quality of a received signal, which requires the analyzer to perform corresponding compensation on the signal after receiving data to eliminate additionally introduced errors, and in general, the compensation module only needs to include channel estimation and channel equalization, but more needs to be considered for 5G signals.

Due to the high sampling rate of the 5G signal, there are two non-negligible error effects in the time dimension when performing 5G signal analysis: trigger jitter and sample jitter. The main cause of the trigger jitter is that the periodic accuracy of a trigger signal generated by a signal source is deviated, and the trigger jitter can cause the data acquired by an analyzer to generate overall random offset; the sampling jitter is mainly caused by the jitter of the local oscillator of the analyzer in the A/D sampling link. The probability of trigger jitter occurring is low and the resulting offset is at the chip level, while the sample jitter is exactly the opposite, so that different schemes need to be used when compensating for both types of jitter.

Due to the fact that the transmission rate of the 5G signal is high, the data received by the analyzer has the phenomenon that the phase offsets of different OFDM symbols are inconsistent, and the 5G frame structure can know that the OFDM symbols corresponding to the PDSCH channel do not all contain reference signals, so that the difference of the phase offsets of different OFDM symbols cannot be made up by the channel equalization time domain difference, and an additional phase compensation module needs to be added in the 5G signal processing process.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a method for realizing 5G signal emission modulation quality measurement based on a signal analyzer, which has the advantages of high accuracy, high precision and small error.

In order to achieve the above purpose, the method for implementing 5G signal emission modulation quality measurement based on the signal analyzer of the present invention is as follows:

the method for realizing 5G signal emission modulation quality measurement based on the signal analyzer is mainly characterized by comprising the following steps of:

(1) triggering jitter compensation and inputting signals;

(2) performing Fourier transform on the received signal according to the input parameters;

(3) compensating sampling jitter;

(4) extracting reference signals of each channel to carry out channel estimation and carrying out channel equalization operation;

(5) performing phase compensation;

(6) the signal emission modulation quality is measured.

Preferably, the step (1) specifically comprises the following steps:

(1.1) inputting parameters and calculating a starting point of the time domain position of the PSS No. 0;

(1.2) extracting data in an input signal range, and performing sliding correlation on the extracted data and local time domain data;

(1.3) judging whether the correlation value exceeds a threshold value, if so, continuing the step (1.4); otherwise, the input signal is not matched with the configuration parameters, no compensation is carried out, and the step is exited;

(1.4) calculating the peak position of the correlation value and calculating the trigger jitter amount;

(1.5) judging whether the trigger jitter amount is 0, if so, not performing any compensation, and exiting the step; otherwise, the trigger jitter amount is issued to the FPGA for trigger jitter compensation.

Preferably, the step (3) specifically includes the following steps:

(3.1) extracting PSS frequency domain data, and performing conjugate multiplication on the PSS frequency domain data and a local code;

(3.2) carrying out conjugate multiplication on the front half section and the rear half section, and calculating the jitter amount of the sampling clock;

and (3.3) compensating the jitter of the sampling clock.

Preferably, the step (5) specifically comprises the following steps:

(5.1) determining a tuning mode according to the input parameters, and calculating a reference point;

(5.2) judging whether the Euclidean distance between the equalized data and the reference point is less than 0.01, and if so, recording the equalized data as a sample point; otherwise, not processing, and exiting the step;

(5.3) calculating 8 powers of all sample points and summing;

and (5.4) calculating the phase deflection amount and performing phase compensation on the equalized data.

Preferably, the input signal range in step (1.2) is [ position1-symbol _ len/2, position1+ symbol _ len/2], where position1 is the starting point of PSS time domain position No. 0, and symbol _ len is the length of one OFDM symbol.

Preferably, the step (1.4) of calculating the trigger jitter amount specifically includes:

the amount of trigger jitter is calculated according to the following equation:

trigger jitter amount position2-position 1;

the position1 is the starting point of the time domain position of PSS 0, and the position2 is the peak position of the correlation value.

By adopting the method for realizing the 5G signal emission modulation quality measurement based on the signal analyzer, the error caused by transmission is reduced by introducing a plurality of modules such as trigger jitter compensation, sampling jitter compensation, phase compensation and the like, and the accuracy of the signal emission modulation quality measurement of the analyzer is greatly improved. Aiming at the processing of the 5G signal by the analyzer, modules such as trigger jitter compensation, sampling jitter compensation, phase compensation and the like are added on the traditional mechanism, so that the accuracy of the transmission modulation quality of the signal measured by the analyzer is improved.

Drawings

Fig. 1 is a flow chart of a method for implementing 5G signal emission modulation quality measurement based on a signal analyzer according to the present invention.

Fig. 2 is a flow chart of trigger jitter compensation of the method for implementing 5G signal transmission modulation quality measurement based on the signal analyzer.

Fig. 3 is a flow chart of the sampling jitter compensation of the method for implementing 5G signal transmission modulation quality measurement based on the signal analyzer.

Fig. 4 is a flow chart of phase compensation of the method for implementing 5G signal transmission modulation quality measurement based on the signal analyzer.

Detailed Description

In order to more clearly describe the technical contents of the present invention, the following further description is given in conjunction with specific embodiments.

The invention discloses a method for realizing 5G signal emission modulation quality measurement based on a signal analyzer, which comprises the following steps:

(1) triggering jitter compensation and inputting signals;

(1.1) inputting parameters and calculating a starting point of the time domain position of the PSS No. 0;

(1.2) extracting data in an input signal range, and performing sliding correlation on the extracted data and local time domain data;

(1.3) judging whether the correlation value exceeds a threshold value, if so, continuing the step (1.4); otherwise, the input signal is not matched with the configuration parameters, no compensation is carried out, and the step is exited;

(1.4) calculating the peak position of the correlation value and calculating the trigger jitter amount;

(1.5) judging whether the trigger jitter amount is 0, if so, not performing any compensation, and exiting the step; otherwise, the trigger jitter amount is issued to the FPGA for trigger jitter compensation;

(2) performing Fourier transform on the received signal according to the input parameters;

(3) compensating sampling jitter;

(3.1) extracting PSS frequency domain data, and performing conjugate multiplication on the PSS frequency domain data and a local code;

(3.2) carrying out conjugate multiplication on the front half section and the rear half section, and calculating the jitter amount of the sampling clock;

(3.3) carrying out sampling clock jitter compensation;

(4) extracting reference signals of each channel to carry out channel estimation and carrying out channel equalization operation;

(5) performing phase compensation;

(5.1) determining a tuning mode according to the input parameters, and calculating a reference point;

(5.2) judging whether the Euclidean distance between the equalized data and the reference point is less than 0.01, and if so, recording the equalized data as a sample point; otherwise, not processing, and exiting the step;

(5.3) calculating 8 powers of all sample points and summing;

(5.4) calculating a phase deflection amount, and performing phase compensation on the equalized data;

(6) the signal emission modulation quality is measured.

As a preferred embodiment of the present invention, the input signal range in step (1.2) is [ position1-symbol _ len/2, position1+ symbol _ len/2], where position1 is the starting point of PSS time domain position No. 0, and symbol _ len is the length of one OFDM symbol.

As a preferred embodiment of the present invention, the step (1.4) of calculating the trigger jitter amount specifically includes:

the amount of trigger jitter is calculated according to the following equation:

trigger jitter amount position2-position 1;

the position1 is the starting point of the time domain position of PSS 0, and the position2 is the peak position of the correlation value.

In the specific implementation mode of the invention, the invention aims to improve the accuracy of the 5G signal emission modulation quality measured by the analyzer.

The invention discloses a method for realizing 5G signal emission modulation quality measurement based on a signal analyzer, which comprises the following steps:

step 1, triggering jitter compensation:

as shown in FIG. 2, the starting point position1 of PSS time domain position No. 0 is known from the input parameters, and data in the range of input signal [ position1-symbol _ len/2, position1+ symbol _ len/2], where symbol _ len is the length of one OFDM symbol, is extracted. And performing sliding correlation on the extracted data and the PSS local time domain data. Comparing the result of the sliding correlation with a threshold value, and if the correlation value does not exceed the threshold value, considering that the input signal is not matched with the configuration parameters, and not performing any compensation; if the correlation value exceeds the threshold value, the peak position2 of the correlation value is calculated. Calculating the trigger jitter amount position2-position1, and if the position2-position1 is equal to 0, not making any compensation; and if the position2-position1 is not equal to 0, issuing the trigger jitter amount to the FPGA for trigger jitter compensation.

And 2, performing FFT operation on the received signal according to the input parameters.

And 3, compensating sampling jitter, wherein the sampling jitter enables each data after FFT to generate a certain amount of phase rotation according to the property of Fourier transform, and the phase rotation amount is directly linked with the sampling jitter amount, so that the sampling jitter amount can be estimated by calculating the phase rotation amount of a certain known signal, and the sampling jitter compensation can be implemented. The present invention is derived from the PSS data, as shown in fig. 3.

The conjugate multiplication is carried out on the PSS frequency domain data after the FFT and the local code to obtain

Wherein k is_iThe subcarrier index, Δ f, the subcarrier interval, τ, and i are 1,2, and 3 … 127, respectively. Then, the result obtained by conjugate multiplication is subjected to conjugate multiplication in the front half section and the rear half section to obtain A_iA_i+63e^{j·2·π·63·Δf·τ}And calculating the phase of the result of conjugate multiplication of the front half section and the rear half section to calculate the sampling jitter amount. Finally, the estimated sampling jitter amount is utilized to perform sampling clock jitter compensation on the FFT data, namely, the FFT data is multiplied by the sampling clock jitter amount

And 4, extracting the reference signals of all channels to carry out channel estimation and channel equalization operation.

Step 5, PDSCH phase compensation:

as shown in fig. 4, the modulation scheme used for PDSCH is known from the input parameters, complex-valued symbols that satisfy the power of eight and are constant in this modulation scheme are obtained, and both of these symbols are used as reference points, for example, in 256QAM modulation scheme

Comparing the equalized data with each reference point one by one, if the equalized data meets the Euclidean distance with a certain reference pointIf the average value is less than 0.01, the equalized data is recorded as a sample point. The octave results of all the sample points are calculated and summed to obtain

Wherein

Is the phase rotation amount; and calculating the phase rotation amount, and performing phase compensation on the equalized data.

And 6, measuring the signal emission modulation quality.

By adopting the method for realizing the 5G signal emission modulation quality measurement based on the signal analyzer, the error caused by transmission is reduced by introducing a plurality of modules such as trigger jitter compensation, sampling jitter compensation, phase compensation and the like, and the accuracy of the signal emission modulation quality measurement of the analyzer is greatly improved. Aiming at the processing of the 5G signal by the analyzer, modules such as trigger jitter compensation, sampling jitter compensation, phase compensation and the like are added on the traditional mechanism, so that the accuracy of the transmission modulation quality of the signal measured by the analyzer is improved.

In this specification, the invention has been described with reference to specific embodiments thereof. It will, however, be evident that various modifications and changes may be made thereto without departing from the broader spirit and scope of the invention. The specification and drawings are, accordingly, to be regarded in an illustrative rather than a restrictive sense.