CN113050101B - Coherent signal receiving device, method and coherent detection system - Google Patents

Abstract

The present invention discloses a coherent signal receiving device, comprising: a receiving array, comprising a plurality of array units, the array units being used to generate a corresponding first signal with polarity based on the received coherent signal; at least one signal processing unit, each of the signal processing units being connected to one or more associated array units, and being used to perform depolarization processing on the corresponding first signal or the superposition signal of a plurality of the first signals according to a preset rule to obtain a second signal. The present invention also discloses a coherent detection system and a coherent signal receiving method. The plurality of first signals with polarity received by the receiving array are uniformly processed according to a preset rule, so that the second signal generated can shield the influence of some interference factors from multiple angles and at multiple levels, reduce signal loss, increase the total output of the coherent signal receiving device, and improve detection efficiency.

Description

Coherent signal receiving device, method and coherent detection system

Technical Field

The present disclosure relates to the technical field of coherent detection, and in particular to a coherent signal receiving device, a coherent signal receiving method and a coherent detection system.

Background Art

Coherent detection is achieved by mixing the echo signal and the local oscillator light, outputting the difference frequency component of the two, and then absorbing it through the detector to generate photocurrent. The difference frequency component retains the amplitude, frequency and phase information of the echo signal, realizing holographic detection of the echo signal. Compared with direct detection, it has the advantages of strong detection capability, high conversion gain, high signal-to-noise ratio and strong anti-interference ability, and is widely used in coherent optical communication, remote sensing, laser radar speed measurement and ranging and other fields.

However, since the signals received by the detector come from different parts of the target, the echo phase fluctuates, and multiple echo signals interfere with the local oscillator light on the detector surface. When the detector absorbs these interference signals, the generated current distribution fluctuates positively and negatively, causing positive and negative cancellation, resulting in a decrease in the total optical heterodyne signal. In particular, when the target surface is rough, the current on the detector is randomly distributed due to the uneven surface of the target, and the photocurrent output after the positive and negative cancellation is severely reduced, affecting the detection efficiency.

In addition, the above series of problems will also be encountered when receiving coherent signals.

In summary, a coherent signal processing solution is urgently needed to solve the above problems.

Summary of the invention

In order to solve the above technical problems, the present disclosure is proposed. The embodiments of the present disclosure provide a coherent signal receiving device, a coherent detection system and a coherent signal receiving method.

According to one aspect of an embodiment of the present disclosure, a coherent signal receiving device is provided, the device comprising:

A receiving array, comprising a plurality of array units, wherein the array units are used to generate corresponding polarized first signals based on received coherent signals;

At least one signal processing unit, each of which is connected to one or more associated array units, and is used to perform depolarization processing on the corresponding first signal or a superimposed signal of multiple first signals according to a preset rule to obtain a second signal.

In one embodiment of the present disclosure, the preset rules include:

Performing even-power processing on the first signal or a superimposed signal of a plurality of the first signals to obtain the second signal; or

The second signal is obtained by taking the absolute value of the first signal or a superimposed signal of a plurality of the first signals.

In one embodiment of the present disclosure, an output unit is further included, which is communicatively connected to at least part of the signal processing circuit and is used to output a third signal after superimposing an input signal including at least part of the second signal.

In one embodiment of the present disclosure, a judgment module is further included, which is used to judge the polarity of each of the first signals based on a preset function and preset parameters to obtain a judgment result, and the judgment result is used to indicate the division of multiple associated array units and/or whether each of the signal processing units performs depolarization processing.

In one embodiment of the present disclosure, the judgment result is used to indicate whether each of the signal processing units performs depolarization processing, including:

When the polarity of the first signal is not the preset polarity, the corresponding signal processing unit performs depolarization processing according to a preset rule, otherwise it is not executed.

In one embodiment of the present disclosure, the plurality of associated array units include any one of the following:

A plurality of array units with the same polarity in the receiving array;

a row or a portion of a row of the receiving array;

a column or a portion of a column of the receiving array;

The area of the receiving array includes more than three array units.

According to another aspect of the embodiment of the present disclosure, a coherent detection system is also provided. The system includes:

A signal transmitting device, used for transmitting a detection signal, a part of which is used to generate an echo signal after being reflected by a detection target, and another part of which is used as a local oscillator signal to enter any of the above-mentioned coherent signal receiving devices for interfering with the echo signal to generate a coherent signal;

The coherent signal receiving device as described above, used to generate a corresponding third signal based on the received coherent signal;

The processing device is used to obtain relevant information of the detection target based on the third signal.

According to another aspect of the embodiment of the present disclosure, a coherent signal receiving method is also provided, the method comprising:

receiving a plurality of coherent signals and generating a plurality of first signals having corresponding polarities based on the received coherent signals;

A depolarization process is performed on the corresponding first signal or a superimposed signal of multiple first signals according to a preset rule to obtain a second signal.

In one embodiment of the present disclosure, the preset rules include:

Performing even-power processing on the first signal or a superimposed signal of a plurality of the first signals to obtain the second signal; or

The second signal is obtained by taking the absolute value of the first signal or a superimposed signal of a plurality of the first signals.

In one embodiment of the present disclosure, the method further includes:

The input signal including at least part of the second signal is superimposed and then a third signal is output.

In one embodiment of the present disclosure, the method further includes:

The polarity of each of the first signals is determined based on a preset function and preset parameters to obtain a determination result, wherein the determination result is used to indicate the division of a plurality of associated array units and/or whether to perform the depolarization process.

In one embodiment of the present disclosure, the judgment result is used to indicate whether each of the signal processing units performs the depolarization processing, including:

When the polarity of the first signal is not the preset polarity, the depolarization processing is performed according to a preset rule, otherwise it is not performed.

Based on a coherent signal receiving device, method and coherent detection system using the device provided by the above-mentioned embodiments of the present disclosure, multiple polarized first signals received by the receiving array are uniformly processed according to preset rules, so that the generated signals can shield the influence of some interference factors from multiple angles and levels, reduce signal loss, improve the overall output of the coherent signal receiving device, and improve the detection efficiency.

The technical solution of the present disclosure is further described in detail below through the accompanying drawings and embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

The present disclosure may be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

FIG1-1 is a schematic diagram of an embodiment of a coherent signal receiving device of the present disclosure;

FIG1-2 is a schematic diagram of another embodiment of a coherent signal receiving device disclosed in the present invention;

FIG2 is a schematic diagram of another embodiment of a coherent signal receiving device of the present disclosure;

FIG3 is a schematic diagram of a detector array of a coherent signal receiving device disclosed in the present invention;

FIG4 is another schematic diagram of the detector array of the coherent signal receiving device disclosed in the present invention;

FIG5 is another schematic diagram of the detector array of the coherent signal receiving device disclosed in the present invention;

FIG6 is a schematic diagram of an optical path system of a square facet of a coherent signal receiving device disclosed in the present invention;

FIG7 is a diagram showing a curve variation of a detector array current of a coherent signal receiving device disclosed herein;

FIG8 is a schematic diagram of the integral current curve of the detector array of the coherent signal receiving device disclosed in the present invention;

FIG9 is a schematic diagram of the current of a facet module in a detector array of a coherent signal receiving device disclosed in the present invention;

FIG10 is another schematic diagram of the current of the facet module in the detector array of the coherent signal receiving device disclosed in the present invention;

FIG11 is a schematic diagram showing how the existing integrated current varies with the size of the detector;

FIG12 is a schematic diagram showing how the integrated current of the coherent signal receiving device disclosed herein changes with the size of the detector;

FIG13 is a schematic diagram of an embodiment of a coherent detection system of the present disclosure;

FIG. 14 is a method flow chart of an embodiment of a coherent signal receiving method disclosed herein.

DETAILED DESCRIPTION

The exemplary embodiments according to the present disclosure will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments of the present disclosure, and it should be understood that the present disclosure is not limited to the exemplary embodiments described here.

It should be noted that the relative arrangement of components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise.

Those skilled in the art can understand that the terms "first" and "second" in the embodiments of the present disclosure are only used to distinguish different steps, devices or modules, etc., and neither represent any specific technical meaning nor indicate the necessary logical order between them.

It should also be understood that in the embodiments of the present disclosure, “plurality” may refer to two or more than two, and “at least one” may refer to one, two or more than two.

It should also be understood that any component, data or structure mentioned in the embodiments of the present disclosure can generally be understood as one or more, unless explicitly limited or otherwise indicated in the context.

In addition, the term "and/or" in this disclosure is only a description of the association relationship of associated objects, indicating that there may be three relationships, such as A and/or B, which can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character "/" in this disclosure generally indicates that the associated objects before and after are in an "or" relationship.

It should also be understood that the description of the various embodiments in the present disclosure focuses on the differences between the various embodiments, and the same or similar aspects thereof can be referenced to each other, and for the sake of brevity, they will not be described one by one.

At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present disclosure, its application, or uses.

Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

The embodiments of the present disclosure can be applied to electronic devices such as terminal devices, computer systems, servers, etc., which can operate with many other general or special computing system environments or configurations. Examples of well-known terminal devices, computing systems, environments and/or configurations suitable for use with electronic devices such as terminal devices, computer systems or servers include, but are not limited to: personal computer systems, server computer systems, thin clients, thick clients, handheld or laptop devices, microprocessor-based systems, set-top boxes, programmable consumer electronics, network personal computers, small computer systems, large computer systems, and distributed cloud computing technology environments including any of the above systems, etc.

Electronic devices such as terminal devices, computer systems, servers, etc. can be described in the general context of computer system executable instructions (such as program modules) executed by computer systems. Generally, program modules can include routines, programs, target programs, components, logic, data structures, etc., which perform specific tasks or implement specific abstract data types. Computer systems/servers can be implemented in a distributed cloud computing environment. In a distributed cloud computing environment, tasks can be performed by remote processing devices linked through a communication network. In a distributed cloud computing environment, program modules can be located on local or remote computing system storage media including storage devices.

SUMMARY OF THE DISCLOSURE

When studying coherent detection, the inventors found that there are some problems with the reception of coherent signals and the series of processing after reception, which will lead to reduced detection efficiency. For example, since the signals received by the detector come from different parts of the target, the echo phase fluctuates, and multiple echo signals interfere with the local oscillator light on the detector surface. When the detector absorbs these interference signals, the generated current distribution will fluctuate positively and negatively, causing positive and negative cancellation, resulting in a reduction in the total optical heterodyne signal. In particular, when the target surface is rough, the current on the detector is randomly distributed due to the uneven and random fluctuations of the target surface, and the photocurrent output after the positive and negative cancellation is severely reduced, affecting the detection efficiency. In addition, the inventors also found that the reception of coherent signals will encounter the above series of problems. On this basis, the inventors of this case further thought about it, conducted research and discovery on the reception of coherent signals and the coherent detection system, and proposed this solution on this basis.

Exemplary Overview

The coherent signal receiving device of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

An example of a coherent signal receiving device provided by the present disclosure is shown in FIG1-1 : A coherent signal receiving device 100 includes a receiving array 120 and at least one signal processing unit 140 .

Wherein, the receiving array 120 includes a plurality of array units, and the array units are used to generate a corresponding polarized first signal based on the received coherent signal. Each of the signal processing units 140 is connected to one or more associated array units, and is used to perform depolarization processing on the corresponding first signal or the superimposed signal of multiple first signals according to a preset rule to obtain a second signal. Referring to Figure 1-1, the signal processing units 140 are respectively connected to an array unit, and each signal processing unit is used to perform depolarization processing on the first signal generated by the corresponding array unit. Referring to Figure 1-2, the signal processing unit 140 can also be connected to a group of associated array units, and is used to perform depolarization processing on the superimposed new signal generated by this group of array units.

It should be noted that the coherent signals targeted by the solution proposed here may include electromagnetic wave signals or sound wave signals, wherein the electromagnetic wave signals involved may include at least one of radio waves, microwaves, infrared rays, visible light, ultraviolet rays, x-rays and gamma rays.

The multiple polarized first signals received by the receiving array are uniformly processed according to preset rules, so that the generated signal can avoid the positive and negative cancellation when the electrical signals of different polarities are superimposed, resulting in a reduction in the total electrical signal when the electrical signals of each pixel of the entire array are superimposed and output, thereby suppressing the decoherence phenomenon, reducing signal loss, increasing the total output of the coherent signal receiving device, and improving the detection efficiency.

By processing the above preset rules, the polar first signal is depolarized to obtain the second signal. The above preset rules may be: processing the first signal or the superposition signal of multiple first signals by even power to obtain the second signal; or taking the absolute value of the first signal or the superposition signal of multiple first signals to obtain the second signal. The depolarization processing is completed by processing the preset rules.

On this basis, referring to FIG2 , the coherent signal receiving device 200 may further include an output unit 160, which is communicatively connected to at least part of the signal processing circuit 140, and is configured to output a third signal after superimposing an input signal including at least part of the second signal. The signal input to and output from the unit 160 may include only the second signal, or may include both the first signal and the second signal.

On this basis, the coherent signal receiving device 100 may further include a judgment module 180, which is used to judge the polarity of each of the first signals based on a preset function and preset parameters to obtain a judgment result, and the judgment result can be used to indicate the division of multiple associated array units and/or whether each of the signal processing units performs depolarization processing. Taking the coherent signal as an optical signal as an example, the preset parameters may include: emission light wavelength, target detection distance, signal light amplitude, local oscillation light amplitude, lens focal length.

The above judgment result can be used to indicate the division of multiple associated array units. For example, when the polarity of the judgment result is the same, it can be divided into associated array units. The above multiple associated array units can include any of the following: multiple array units with the same polarity in the receiving array; a row or a part of a row of the receiving array; a column or a part of a column of the receiving array; an area of the receiving array, which includes more than three array units.

The above judgment result can also be used to indicate whether each of the signal processing units performs depolarization processing. For example, when the polarity of the first signal is not the preset polarity, the corresponding signal processing unit performs depolarization processing according to the preset rules, otherwise it is not performed. In this way, the polarity of the first signal can be known, and when it is not the preset polarity to be obtained, the depolarization processing is performed. The specific depolarization processing method can refer to the above-mentioned depolarization processing method.

On this basis, a coherent detection system is also disclosed, including: a signal transmitting device, a coherent signal receiving device and a processing device.

The signal transmitting device is used to transmit a detection signal, a part of which is used to generate an echo signal after being reflected by the detection target, and the other part is used as a local oscillator signal to enter the coherent signal receiving device as described above, and is used to interfere with the echo signal to generate a coherent signal; and the coherent signal receiving device as described above is used to generate a corresponding third signal based on the received coherent signal; the processing device is used to obtain relevant information of the detection target based on the third signal. The relevant information here includes speed and/or distance information.

By depolarizing the received signal through the coherent signal receiving device, the influence of some interference factors can be shielded from multiple angles and multiple levels, the signal loss can be reduced, the overall output of the coherent signal receiving device can be increased, and the detection efficiency can be improved.

Exemplary Devices

In order to better understand the present solution, the present solution is further described in detail below by taking the coherent signal as an optical signal as an example. However, it should be noted that the coherent signal as an optical signal is only an exemplary description here, and is not a limitation on the coherent signal. Other coherent signals in the field are within the protection scope of the present solution.

The detection signal is transmitted through the optical signal transmitting device. A part of the detection signal generates an echo signal after being reflected by the detection target, and the other part enters the coherent signal receiving device as a local oscillator signal to interfere with the echo signal to generate a coherent signal.

The receiving array of the above-mentioned coherent signal receiving device can be a detector array, and the corresponding array unit can be a face element or a pixel in the detector array. Among them, the face element can include at least one pixel. Referring to Figures 3 and 4, the detector array includes a plurality of pixels, wherein the face element includes one pixel. As shown in Figure 5, the detector array includes a plurality of face elements, wherein the face element includes a plurality of pixels.

Regarding the division of the detector array, as shown in Figures 4 and 5, the center point of the detector array can be used as the center, and a central face element or pixel can be set, and the entire array can be divided outward in sequence according to a preset size based on the central face element or pixel; or as shown in Figure 3, the center point of the detector array can be used as the common vertex of multiple central face elements or pixels, and the entire detector array can be divided outward in sequence according to a preset size based on the multiple central face elements or pixels.

Regarding the division of facets or pixels, the area can be divided according to the current distribution in the detector array, and the area of the facets or pixels can be controlled within the area with the same current direction. Regarding the shape of facets or pixels, considering the manufacturing process and saving array area, the detector array is mostly divided into square pixels, whose side length is less than or equal to the maximum distance corresponding to the integrated current phase change in the detector array.

The following uses a square pixel or a surface element as an example to further explain how to determine the polarity of a pixel or a surface element and how to perform depolarization.

Refer to Figure 6 for the optical path system of a square pixel. The light emitted from point A and point O on the target passes through the optical receiving system and irradiates the detector surface. L is the distance between point O of the target object and the receiving system, _L1 is the optical path from point O to the detector surface, that is, the focal length of the optical receiving system, d is the optical path from point A to the receiving system, _d1 is the optical path from point A to the detector surface, and the distance from point A to the optical axis is The distance from the image point corresponding to point A' on the detector to the optical axis

The optical path difference between the two rays is:

Δ＝d+d ₁ −LL ₁ (Formula 1)

Simplifying, we get:

Ignore the time characteristics and substitute the above formula into ω _IF = 0, the current is:

When the wavelength is λ, the detection distance is L, the signal light amplitude is _As , the local oscillation light amplitude is A _l , and the distance from the lens to the detection surface is _L1 , the current distribution of the detector array can be obtained according to Formula 3.

FIG7 shows the variation of the current in the detector array with the radius R. It can be seen from the figure that when the radius of the detector array is within a certain range, the current directions generated by the signal light and the local oscillator light are the same, and then the current directions are reversed. As the radius of the array increases, the current direction shows a periodic change, and the frequency of the change increases with the increase of the radius.

As shown in FIG8 , by integrating the current distribution curve, the relationship between the final output current of the detector array and the size of the detector surface area can be obtained. As the integral size increases, the integral current, that is, the final output current, decreases. The main reason is that when the integral is a square, as the integral area increases, the more circular interference fringes cut by the four right-angled sides of the integral, the more current is cut, and the more positive and negative are offset, so the overall signal amplitude cannot reach the maximum value of the first amplitude. As can be seen from FIG8 , as the size of the detector increases, the integral current gradually rises from zero to the first maximum value, indicating that the direction of the current is the same within the size range, and the output current increases with the increase in size, but begins to decrease after the maximum value, indicating that the further increased size range is the reverse direction current, causing the integral current to decrease with the further increase in size. Therefore, according to Formula 3, the positive and negative of each face element or pixel can be obtained by integrating the area where the face element or pixel is located (refer to FIG9 or 10).

As shown in FIG9 , the positive and negative current distribution on each pixel is when the wavelength λ is 905 nm, the detection distance is L=200 m, the signal light amplitude is _As =5 mW, the local oscillator light amplitude is A _l =10 mW, the focal length of the lens to the detection surface is L ₁ =0.030 m, and the pixel size is 1.25 um×1.25 um. According to the preset rules, the positive currents and the negative currents can be added separately to obtain the total I(+) and the total I(-), and then the total I(-) can be reversed and added to obtain the total output current, thereby increasing the total output current on the array. Alternatively, the even-power processing can be performed separately and then added to obtain the total output current.

The above-mentioned depolarization treatment has more realistic effects and significance in actual operations.

For example, in the actual detection process, since the target object is often not a smooth surface but has a certain degree of roughness, the following embodiment provides an implementation process for detecting a rough surface target object.

The optical path difference between two rays on the rough surface is Δ＝d+d ₁ -LL ₁ +h(x,y) (Formula 4)

h(x,y) is the rough surface distribution function. Assuming the size of the detected pixel is a 20um square, with the center of the pixel as the 0 point, the coordinates at the distance from the pixel R1 are Substituting into equation 4, we get

Ignore the time characteristics and substitute the above formula into ω _IF = 0, the current is:

The current is integrated in the x and y directions within the detection surface to obtain the final output current integral. As shown in Figure 11, it can be seen from this figure that in the case of the influence of the rough surface, the integral current will change in amplitude as the detector size changes, and the positive and negative currents no longer show regular periodic changes as on the smooth surface. At this time, if the current direction is processed in the same direction, such as reversing the negative current, the obtained integral current changes with the detector size curve as shown in Figure 12, and the order of magnitude of the output current is increased from ^10-12 shown in Figure 11 to ^10-9 , which is an increase of 3 orders of magnitude, which will be beneficial to improving the signal-to-noise ratio and detection efficiency.

In this case, it is more difficult to judge the positive and negative values of different bins or pixels in the array, as shown in Figure 10. Therefore, the depolarization rule is preferably to process the output current of each bin or pixel to an even power, such as taking the square and then outputting it; or to take the absolute value of the output current of each bin or pixel and then add them together to increase the output current.

Furthermore, because the current in each pixel itself has positive and negative cancellation, the final output current is actually the sum of the integrated currents on each pixel. Therefore, the output current of each pixel or pixel can be further increased by reducing the positive and negative cancellation inside the pixel or pixel, thereby increasing the total output current of the entire array.

In order to reduce the positive and negative cancellation within the pixel, it is necessary to divide the area with the same current direction into one pixel as much as possible, reduce the proportion of currents with different directions, and reduce the pixel area to achieve this requirement. Preferably, the side length of the face element or pixel can be controlled to be less than or equal to the maximum distance corresponding to the integral current phase change of π/2 in the detector array. Since the frequency of change of the integral current increases with the increase of the detector size, the distance corresponding to the integral current phase change of π/2 becomes shorter and shorter. As shown in Figure 8, the maximum distance is the center of the detector array, and the distance is D.

It can be seen that the coherent signal receiving device with depolarization processing provided by this solution has a very obvious effect in actual operation, and can be combined with different environments, and different depolarization methods can be selected, so it is relatively practical.

Exemplary Methods

Based on the same design concept as the above coherent signal receiving device, a coherent signal receiving method is also provided. The method comprises the following steps:

Step S120: receiving a plurality of coherent signals and generating a plurality of corresponding first signals with polarities based on the received coherent signals;

Step S140: performing depolarization processing on the corresponding first signal or a superimposed signal of multiple first signals according to a preset rule to obtain a second signal.

The depolarization processing rules may include: performing even-power processing on the first signal or a superimposed signal of multiple first signals to obtain the second signal; or taking the absolute value of the first signal or a superimposed signal of multiple first signals to obtain the second signal.

Based on the above, the method further includes: outputting a third signal after superimposing an input signal including at least a portion of the second signal.

On the basis of the above, it also includes: judging the polarity of each of the first signals based on a preset function and preset parameters to obtain a judgment result, wherein the judgment result is used to indicate the division of multiple associated array units and/or whether each of the signal processing units performs depolarization processing.

When the judgment result is used to indicate whether each of the signal processing units performs depolarization processing, it includes: when the polarity of the first signal is not a preset polarity, the corresponding signal processing unit performs depolarization processing according to a preset rule, otherwise it is not performed.

When the judgment result is used to indicate the division of multiple associated array units, it includes setting array units with the same polarity as associated array units. The multiple associated array units mentioned above include any one of the following: multiple array units with the same polarity in the receiving array; a row or a part of a row of the receiving array; a column or a part of a column of the receiving array; an area of the receiving array, the area including more than three array units.

By depolarizing the received signal using a coherent signal receiving method, the influence of some interference factors can be shielded from multiple angles and levels, signal loss can be reduced, the total output of the coherent signal receiving device can be increased, and the detection efficiency can be improved.

The basic principles of the present disclosure are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present disclosure are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. must be possessed by each embodiment of the present disclosure. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, rather than limitation, and the above details do not limit the present disclosure to the necessity of adopting the above specific details to be implemented.

Each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the system embodiment, since it basically corresponds to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

The block diagrams of the devices, apparatuses, equipment, and systems involved in the present disclosure are intended only as illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagrams. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems may be connected, arranged, and configured in any manner. Words such as "include," "comprise," "have," and the like are open words, meaning "including but not limited to," and may be used interchangeably therewith. The words "or" and "and" used herein refer to the words "and/or," and may be used interchangeably therewith, unless the context clearly indicates otherwise. The word "such as" used herein refers to the phrase "such as but not limited to," and may be used interchangeably therewith.

The method and apparatus of the present disclosure may be implemented in many ways. For example, the method and apparatus of the present disclosure may be implemented by software, hardware, firmware, or any combination of software, hardware, and firmware. The above order of steps for the method is for illustration only, and the steps of the method of the present disclosure are not limited to the order specifically described above, unless otherwise specifically stated. In addition, in some embodiments, the present disclosure may also be implemented as a program recorded in a recording medium, which includes machine-readable instructions for implementing the method according to the present disclosure. Therefore, the present disclosure also covers a recording medium storing a program for executing the method according to the present disclosure.

It should also be noted that in the apparatus, device and method of the present disclosure, each component or each step can be decomposed and/or recombined. Such decomposition and/or recombination should be regarded as equivalent solutions of the present disclosure.

The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present disclosure. Various modifications to these aspects, etc., will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present disclosure. Therefore, the present disclosure is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present disclosure to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims (10)

1. A coherent signal receiving apparatus is characterized in that,

Comprising the following steps:

A receive array comprising a plurality of array elements for generating respective first signals of polarity based on the received coherent signals;

The signal processing units are connected with one or more associated array units and are used for performing depolarization processing on the corresponding first signals or the superimposed signals of the plurality of first signals according to a preset rule to obtain second signals;

the preset rule is that the first signal or the superposition signals of a plurality of first signals are subjected to even power processing to obtain the second signal.

2. The apparatus of claim 1, further comprising, in communication with at least a portion of the signal processing circuitry, a third signal for outputting after superimposing an input signal comprising at least a portion of the second signal.

3. The apparatus of claim 1, further comprising a judging module configured to judge a polarity of each of the first signals based on a preset function and a preset parameter to obtain a judgment result, the judgment result being used to indicate a division of a plurality of associated array units, and/or whether each of the signal processing units performs a depolarization process.

4. The apparatus of claim 3, the determination result for indicating whether each of the signal processing units performs a depolarization process, comprising:

when the polarity of the first signal is not the preset polarity, the corresponding signal processing unit performs the depolarization processing according to the preset rule, otherwise, the depolarization processing is not performed.

5. The apparatus of any one of claims 1 to 4, the plurality of associated array elements comprising any one of:

A plurality of array units with the same polarity in the receiving array;

a row or a portion of a row of the receiving array;

A column or a portion of a column of the receiving array;

The area of the receiving array includes more than three array elements.

6. A coherent detection system, comprising:

Signal transmitting means for transmitting a probe signal, a part of the probe signal being used for generating an echo signal after being reflected by a probe target, and the other part being used as a local oscillation signal and entering the coherent signal receiving means according to any one of claims 1 to 5, for interfering with the echo signal to generate a coherent signal;

the coherent signal receiving device according to any one of claims 1 to 5, for generating a corresponding third signal based on the received coherent signal;

Processing means for obtaining information about the detection target based on the third signal.

7. A coherent signal receiving method is characterized in that,

Comprising the following steps:

receiving a plurality of coherent signals and generating a corresponding plurality of first signals having polarities based on the received coherent signals;

Performing depolarization processing on the corresponding first signal or the superimposed signal of a plurality of first signals according to a preset rule to obtain a second signal;

the preset rule is that the first signal or the superposition signals of a plurality of first signals are subjected to even power processing to obtain the second signal.

8. The method of claim 7, wherein the step of determining the position of the probe is performed,

The method further comprises the steps of:

and superposing input signals comprising at least part of the second signals and outputting third signals.

9. The method of claim 7, wherein the step of determining the position of the probe is performed,

The method further comprises the steps of:

And judging the polarity of each first signal based on a preset function and a preset parameter to obtain a judgment result, wherein the judgment result is used for indicating the division of a plurality of associated array units and/or whether to execute the depolarization processing.

10. The method of claim 9, wherein the step of determining the position of the substrate comprises,

The judging result is used for indicating whether each signal processing unit executes the depolarization processing or not, and comprises the following steps:

and when the polarity of the first signal is not the preset polarity, performing the depolarization according to a preset rule, otherwise, not performing the depolarization.