CN114024635A

CN114024635A - Wide signal measurement method and device considering signal-to-noise ratio

Info

Publication number: CN114024635A
Application number: CN202111359582.9A
Authority: CN
Inventors: 刘宏璇; 张丙伟; 刘玉莲
Original assignee: Nanjing Changfeng Space Electronics Technology Co Ltd
Current assignee: Nanjing Changfeng Space Electronics Technology Co Ltd
Priority date: 2021-11-17
Filing date: 2021-11-17
Publication date: 2022-02-08

Abstract

The invention discloses a method and a device for measuring a wide signal considering signal-to-noise ratio, belonging to the technical field of electronic reconnaissance and radar signal processing, wherein the method comprises the following steps: receiving a wide-amplitude input signal, carrying out wave detection amplitude comparison processing on the signal, controlling to gate a branch 1 when the signal amplitude is larger than a preset threshold value, directly outputting the signal, controlling to gate a branch 2 when the signal amplitude is smaller than the threshold value, and outputting the signal after amplification; the processed signal is finally controlled by the numerical control attenuator to be stabilized at the receiving nominal power value, the invention adopts a method for distinguishing and processing the received wide-width signal, ensures that the signal-to-noise ratio of the input signal is not deteriorated through different links, reduces the false detection rate, and simultaneously realizes the rapid convergence and stable output of the amplitude, and the method has simple links and takes into account the economic benefit.

Description

Wide signal measurement method and device considering signal-to-noise ratio

Technical Field

The invention relates to a method and a device for measuring a wide signal considering signal-to-noise ratio, belonging to the technical field of electronic reconnaissance and radar signal processing.

Background

In the modern electronic warfare process, electronic signal detection and reception are the first step of electronic countermeasure, and detection and reception signals serve as the basis of subsequent signal sorting and signal processing, and whether the detection and reception signals are accurate or not directly determines the effectiveness of the whole electronic countermeasure.

In the actual electronic warfare process, electromagnetic signal is complicated, the cover frequency range is wide, signal power fluctuates greatly, to the wide-width signal that the power fluctuation changes fast, use the automatic gain control mode to handle at present more, this kind of mode has certain drawback, when signal amplitude developments are too big, the tradition is handled the link and is hardly taken into account two, when guaranteeing the effective detection of small signal, when high-power signal reachs, must lead to the signal saturation, compress the SNR, direct influence follow-up reconnaissance result, the false rate is high, therefore need a wide-width signal measurement method that can compromise the SNR promptly.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide a method and a device for measuring a wide signal with consideration of signal-to-noise ratio.

In order to achieve the purpose, the invention is realized by adopting the following technical scheme:

in a first aspect, the present invention provides a method for measuring a wide signal with consideration to signal-to-noise ratio, including:

receiving a wide-amplitude input signal, carrying out wave detection amplitude comparison processing on the signal, controlling to gate a branch 1 when the signal amplitude is larger than a preset threshold value, directly outputting the signal, controlling to gate a branch 2 when the signal amplitude is smaller than the threshold value, and outputting the signal after amplification;

and inputting the amplified signal into a numerical control attenuator, and finally controlling the input signal to be stabilized at a receiving nominal power value.

Further, a fixed attenuator and an amplifier are arranged between the gating 1 branch and the gating 2 branch.

Furthermore, the gain difference between the gating 1 branch and the gating 2 branch is a fixed value A, and a digitally controlled attenuator B is cascaded after the switches are combined.

In a second aspect, the present invention provides a wide signal measuring apparatus with a signal-to-noise ratio, including:

the processing unit is used for receiving the wide-width input signal, carrying out wave detection amplitude comparison processing on the signal, controlling to gate the branch 1 when the signal amplitude is larger than a preset threshold value, directly outputting the signal, controlling to gate the branch 2 when the signal amplitude is smaller than the threshold value, and amplifying and outputting the signal;

and the control unit is used for enabling the processed signals to pass through the numerical control attenuator and finally controlling the input signals to be stable at the receiving nominal power value.

In a third aspect, the present invention provides a wide signal measurement apparatus considering signal-to-noise ratio, including a processor and a storage medium;

the storage medium is used for storing instructions;

the processor is configured to operate in accordance with the instructions to perform the steps of the method according to any of the above.

In a fourth aspect, the invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of any of the methods described above.

Compared with the prior art, the invention has the following beneficial effects:

the wide signal measuring method and device considering the signal-to-noise ratio provided by the invention have the advantages that the received wide signals are distinguished and processed, the optimal signal-to-noise ratio of the output signals is ensured through different control links, the false detection rate is reduced, and meanwhile, the amplitude is rapidly converged and stably output.

Drawings

Fig. 1 is a circuit for automatically controlling and measuring a wide-range signal according to an embodiment of the present invention.

Detailed Description

The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

Example 1

The embodiment introduces a method for measuring a wide signal with consideration to a signal-to-noise ratio, which includes:

receiving a wide dynamic input signal, and carrying out detection and amplitude comparison processing on the signal, wherein when the signal amplitude is greater than a preset threshold value, the gating 1 branch is controlled, the signal passes through the through branch, and when the signal amplitude is less than the threshold value, the gating 2 branch is controlled, and the signal is amplified and then output;

and inputting the amplified signal into a numerical control ATT (automatic transfer test), and controlling the input signal to be stabilized at a receiving nominal power value.

And a fixed attenuator and an amplifier are arranged between the gating 1 branch and the gating 2 branch.

The gain difference between the gating 1 branch and the gating 2 branch is a fixed value A, and a digitally controlled attenuation B is cascaded after the switches are combined.

The application process of the wide-width signal measuring method and device considering signal-to-noise ratio provided by the embodiment specifically relates to the following steps:

firstly, receiving a wide-width input signal, carrying out wave detection and amplitude comparison processing after the signal reaches AD, controlling to gate a branch 1 when the signal amplitude is larger than a threshold value P, ensuring that a signal link works in a linear region without deteriorating the signal-to-noise ratio by the signal passing through a straight-through branch, and controlling to gate a branch 2 when the signal amplitude is smaller than the threshold value P, and outputting a small signal after amplifying the small signal.

And the second and subsequent signals pass through the numerical control ATT, and the input signals are controlled to be stabilized at the receiving nominal power value, so that the stability of the final output signals is ensured.

And thirdly, the gain phase difference between the two branches is a fixed value A through the allocation of a fixed attenuator and an amplifier, the designed circuit is equivalent to a simple A-value attenuator, the switches are combined and then cascaded with a digitally controlled attenuation B, and the system can realize the wide input power control function of the A + B range.

The contents designed in the above embodiments will be described below with reference to a preferred embodiment.

The dynamic range of a signal to be detected is-70 dBm-10 dBm, the threshold value is-30 dBm, when the signal power of the detection amplitude ratio is larger than-30 dBm, the signal is attenuated to a required stable power value through a direct link 1 branch, when the signal power of the detection amplitude ratio is smaller than-30 dBm, the signal is amplified by 40dB through a branch 2 and then is attenuated to the same stable power value through a subsequent numerical control attenuator.

By the processing, the signal link is ensured to be output without saturation, the signal-to-noise ratio is not deteriorated, the effective measurement of the wide-width signal is realized, and the error detection probability is greatly reduced.

Example 2

The embodiment provides a wide signal measuring device with signal-to-noise ratio, including:

Example 3

The embodiment provides a wide-amplitude signal measuring device considering signal-to-noise ratio, which comprises a processor and a storage medium;

the storage medium is used for storing instructions;

the processor is configured to operate in accordance with the instructions to perform the steps of the method according to any one of:

Example 4

The present embodiments provide a computer-readable storage medium, on which a computer program is stored, which when executed by a processor implements the steps of any of the methods:

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. a wide-width signal measurement method taking into account the signal-to-noise ratio, is characterized in that, comprising:

Receive a wide-width input signal, and perform detection and amplitude ratio processing on the signal. When the signal amplitude is greater than the preset threshold value, control the strobe 1 branch, and the signal is directly output. When the signal amplitude is less than the threshold value, control the selection. Through 2 branches, the signal is amplified and output;

The processed signal is passed through a numerically controlled attenuator, and finally the input signal is controlled to be stable at the receiving nominal power value.

2 . The method for measuring a wide signal with a signal-to-noise ratio taking into account according to claim 1 , wherein a fixed attenuator and an amplifier are arranged between the gate 1 branch and the gate 2 branch. 3 .

3. The wide-amplitude signal measurement method taking into account the signal-to-noise ratio according to claim 2, wherein the gain difference between the gate 1 branch and the gate 2 branch is a fixed value A, and the switch is combined. Then cascade a digital attenuation B.

4. A wide-amplitude signal measuring device taking into account the signal-to-noise ratio is characterized in that, comprising:

The processing unit is used to receive a wide-width input signal, and perform detection and amplitude ratio processing on the signal. When the signal amplitude is greater than the preset threshold value, control the gate 1 branch, and the signal is directly output. When the signal amplitude is less than the threshold When the value is set, control the strobe 2 branches, amplify the signal and output it;

The control unit is used to pass the processed signal through the numerically controlled attenuator, and finally control the input signal to be stable at the receiving nominal power value.

5 . The wide-amplitude signal measuring device taking into account the signal-to-noise ratio according to claim 4 , wherein a fixed attenuator and an amplifier are arranged between the gate 1 branch and the gate 2 branch. 6 .

6 . The wide-amplitude signal measuring device taking into account the signal-to-noise ratio according to claim 5 , wherein the gain difference between the gate 1 branch and the gate 2 branch is a fixed value A, and the switch is combined. 7 . Then cascade a digital attenuation B.

7. A wide signal measuring device with consideration to signal-to-noise ratio, characterized in that: comprising a processor and a storage medium;

the storage medium is used for storing instructions;

The processor is adapted to operate according to the instructions to perform the steps of the method according to any one of claims 1-5.

8. A computer-readable storage medium on which a computer program is stored, characterized in that: when the program is executed by a processor, the steps of the method according to any one of claims 1 to 5 are implemented.