Waveform adjustment methods to improve signal resolution

Abstract

A waveform adjustment method for improving signal resolution is applicable to adjusting a waveform to be adjusted corresponding to a received signal. For each adjustment point of the waveform to be adjusted, the method includes the following steps: (A) when the adjustment point is a target point, adjusting the wave value of the target point to the wave value of the adjustment point with the maximum wave value and using it as the highest point of the adjusted waveform, wherein the target point is selected from the adjustment point with the maximum wave value and at least one neighboring adjustment point adjacent to the adjustment point with the maximum wave value; and (B) when the adjustment point is not the target point, adjusting the adjustment point so that the angle between the rising and falling portions of the adjusted waveform is smaller than the angle between the rising and falling portions of the waveform to be adjusted.

Description

Technical Field

[0001] This invention relates to a method for improving signal resolution, and more particularly to a waveform adjustment method for improving signal resolution by adjusting a waveform to be adjusted corresponding to a received signal. Prior Technology

[0002] When using traditional radar for detection, the radar transmitter (TX) emits a signal that hits an object and bounces back, generating echoes. These echoes are then received by the radar system receiver (RX). In the current time domain, longer wavelengths cause the echo signals to overlap on the time axis, resulting in low resolution and reduced time domain resolution. This can lead to problems with traditional radar detection methods, such as the inability to distinguish between two objects.

[0003] The traditional solution for radar is to shorten the wavelength. However, shortening the wavelength brings some challenges, such as the difficulty in long-distance transmission. Therefore, although shorter wavelengths naturally result in higher resolution, they also have the obvious drawback of being difficult to transmit over long distances. On the other hand, maintaining the resolution of the original wavelength is often unsatisfactory. Thus, it is necessary to find a solution. Summary of the Invention

[0004] Therefore, the objective of this invention is to provide a waveform adjustment method that improves signal resolution by narrowing the waveform to increase its resolution and thereby enhance the accuracy of radar systems in distinguishing objects.

[0005] Therefore, the waveform adjustment method for improving signal resolution of the present invention is applicable to adjusting a waveform to be adjusted corresponding to a received signal, and is implemented by a processing unit. The waveform to be adjusted includes multiple adjustment points. For each adjustment point, the waveform adjustment method for improving signal resolution includes the following steps:

[0006] (A) When the point to be adjusted is a target point, the wave value of the target point is adjusted to the wave value of the point to be adjusted with the maximum wave value, and this is taken as the highest point of the adjusted waveform, wherein the target point is selected from the point to be adjusted with the maximum wave value and at least one neighboring point to be adjusted adjacent to the point to be adjusted with the maximum wave value; and

[0007] (B) When the point to be adjusted is not the target point, adjust the point to be adjusted so that the angle between the rising and falling parts of the adjusted waveform is smaller than the angle between the rising and falling parts of the waveform to be adjusted.

[0008] The advantages of this invention are: without altering the existing conventional radar system, that is, without changing the wavelength and bandwidth of the radar signal, the waveform is adjusted so that the angle between the rising and falling portions of the adjusted waveform is smaller than the angle between the rising and falling portions of the original waveform, thereby improving the resolution and thus improving the accuracy of determining the number of objects under test within a predetermined time. Simple Explanation of the Diagram

[0009] Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, wherein: Figure 1 is a block diagram illustrating a processing unit signal-connected to a signal receiving unit in an embodiment of the waveform adjustment method for improving signal resolution according to the present invention; and Figure 2 is a flowchart illustrating an embodiment of the waveform adjustment method for improving signal resolution according to the present invention; and Figure 3 is a schematic diagram illustrating a waveform to be adjusted and a waveform after adjustment. Implementation

[0010] Referring to Figure 1, an embodiment of the waveform adjustment method for improving signal resolution according to the present invention is applicable to adjusting a waveform to be adjusted corresponding to a received signal, and is implemented by a processing unit 12. The processing unit 12 is signal-connected to a signal receiving unit 11 for receiving the received signal.

[0011] Referring to Figures 1 and 2, for each adjustment point of the waveform to be adjusted, an embodiment of the waveform adjustment method for improving signal resolution of the present invention includes the following steps.

[0012] In step 51, the processing unit 12 determines the point to be adjusted as one of an ascending point located in the ascending portion of the waveform, the target point, and a descending point located in the descending portion of the waveform.

[0013] In step 52, when the point to be adjusted is the target point, the wave value of the target point is adjusted to the wave value of the point to be adjusted with the maximum wave value and used as the highest point of the adjusted waveform. The target point is selected from the point to be adjusted with the maximum wave value and at least one neighboring point to be adjusted that is adjacent to the point to be adjusted with the maximum wave value.

[0014] In step 53, when the point to be adjusted is not the target point, the point to be adjusted is adjusted so that the angle between the rising and falling portions of the adjusted waveform is smaller than the angle between the rising and falling portions of the waveform to be adjusted. Step 53 includes sub-steps 531-532. In sub-step 531, when the point to be adjusted is not the target point and is a rising point, the wave value of the point to be adjusted is adjusted to the average wave value of the point to be adjusted and the n points preceding it. In sub-step 532, when the point to be adjusted is not the target point and is a falling point, the wave value of the point to be adjusted is adjusted to zero.

[0015] Regarding how the processing unit 12 determines the point to be adjusted as one of the rising point, the target point, and the falling point, at least the following three implementation states are included.

[0016] In the first embodiment, the processing unit 12 determines the point to be adjusted as one of the rising point, the target point, and the falling point based on the wave value of the point to be adjusted, the wave value of the point below the point to be adjusted, and the wave values ​​of the two points below the point to be adjusted. When the wave values ​​of the two points below the point to be adjusted are greater than the wave value of the point below the point to be adjusted, and the wave value of the point below the point to be adjusted is greater than the wave value of the point to be adjusted, the point to be adjusted is determined as the rising point. When the wave values ​​of the two points below the point to be adjusted are less than the wave value of the point below the point to be adjusted, and the wave value of the point below the point to be adjusted is greater than the wave value of the point to be adjusted, the point to be adjusted is determined as the target point. When the wave values ​​of the two points below the point to be adjusted are less than the wave value of the point below the point to be adjusted, and the wave value of the point below the point to be adjusted is less than the wave value of the point to be adjusted, the point to be adjusted is determined as the falling point. Figure 3 illustrates the waveform 301 to be adjusted and the adjusted waveform 302 obtained according to the first embodiment.

[0017] In the second embodiment, the processing unit 12 determines the point to be adjusted as one of the rising point, the target point, and the falling point based on the wave value of the point above the point to be adjusted, the wave value of the point to be adjusted, and the wave value of the point below the point to be adjusted. When the wave value of the point above the point to be adjusted is less than the wave value of the point to be adjusted, and the wave value of the point to be adjusted is less than the wave value of the point below the point to be adjusted, the point to be adjusted is determined as the rising point. When the wave value of the point above the point to be adjusted is less than the wave value of the point to be adjusted, and the wave value of the point to be adjusted is greater than the wave value of the point below the point to be adjusted, the point to be adjusted is determined as the target point. When the wave value of the point above the point to be adjusted is greater than the wave value of the point to be adjusted, and the wave value of the point to be adjusted is greater than the wave value of the point below the point to be adjusted, the point to be adjusted is determined as the falling point.

[0018] In the third embodiment, the processing unit 12 determines the point to be adjusted as one of the rising point, the target point, and the falling point based on the wave values ​​of two points above the point to be adjusted, the wave value of one point above the point to be adjusted, and the wave value of the point to be adjusted. When the wave values ​​of the two points above the point to be adjusted are less than the wave value of the one point above the point to be adjusted, and the wave value of the one point above the point to be adjusted is less than the wave value of the point to be adjusted, the point to be adjusted is determined to be the rising point. When the wave values ​​of the two points above the point to be adjusted are less than the wave value of the one point above the point to be adjusted, and the wave value of the one point above the point to be adjusted is greater than the wave value of the point to be adjusted, the point to be adjusted is determined to be the target point. When the wave values ​​of the two points above the point to be adjusted are greater than the wave value of the one point above the point to be adjusted, and the wave value of the one point above the point to be adjusted is greater than the wave value of the point to be adjusted, the point to be adjusted is determined to be the falling point.

[0019] In summary, the waveform adjustment method for improving signal resolution of the present invention adjusts the waveform without modifying the existing conventional radar system, i.e., without changing the wavelength and bandwidth of the radar signal. This adjusts the waveform so that the angle between the rising and falling portions of the adjusted waveform is smaller than the angle between the rising and falling portions of the original waveform, thereby improving resolution and increasing the accuracy of determining the number of objects within a predetermined time. Furthermore, since the waveform adjustment method using the processing unit 12 does not require adjusting the wavelength and frequency of the existing radar system, it has high compatibility with conventional radar systems, thus effectively achieving the purpose of the present invention.

[0020] However, the above description is merely an embodiment of the present invention and should not be construed as limiting the scope of the present invention. Any simple equivalent changes and modifications made in accordance with the scope of the patent application and the contents of the patent specification of the present invention shall still fall within the scope of the patent of the present invention.

[0021] 11: Signal Receiving Unit 12: Processing Unit Steps 51-53 531~532: Sub-steps 30: Waveform to be adjusted 302: Adjusted waveform

Claims

1. A waveform adjustment method for improving signal resolution, applicable to adjusting a waveform to be adjusted corresponding to a received signal, and implemented by a processing unit, the waveform to be adjusted comprising a plurality of adjustment points, wherein for each adjustment point, the waveform adjustment method for improving signal resolution comprises the following steps: (A) when the adjustment point is a target point, adjusting the wave value of the target point to the wave value of the adjustment point corresponding to the maximum wave value and using it as the highest point of the adjusted waveform, wherein the target point is selected from the adjustment point corresponding to the maximum wave value and at least one neighboring adjustment point adjacent to the adjustment point corresponding to the maximum wave value; and (B) when the adjustment point is not the target point, adjusting the adjustment point so that the angle between the rising and falling portions of the adjusted waveform is smaller than the angle between the rising and falling portions of the waveform to be adjusted.

2. The waveform adjustment method for improving signal resolution as described in claim 1, further comprising the following steps before step (A): (C) determining the point to be adjusted as one of an rising point located in the rising portion of the waveform, the target point, and a falling point located in the falling portion of the waveform.

3. The waveform adjustment method for improving signal resolution as described in claim 2, wherein, Step (B) includes the following sub-steps: (B-1) When the point to be adjusted is not the target point and is an ascending point, adjust the wave value of the point to be adjusted to the average wave value of the point to be adjusted and the n points preceding the point to be adjusted; and (B-2) When the point to be adjusted is not the target point and is a descending point, adjust the wave value of the point to be adjusted to zero.

4. The waveform adjustment method for improving signal resolution as described in claim 2, wherein, In step (C), the point to be adjusted is determined to be one of the rising point, the target point, and the falling point based on the wave value of the point to be adjusted, the wave value of the point below the point to be adjusted, and the wave values ​​of the two points below the point to be adjusted.

5. The waveform adjustment method for improving signal resolution as described in claim 4, wherein, In step (C), when the wave values ​​of the two points below the point to be adjusted are greater than the wave value of the point below the point to be adjusted, and the wave value of the point below the point to be adjusted is greater than the wave value of the point to be adjusted, the point to be adjusted is determined to be the rising point. When the wave values ​​of the two points below the point to be adjusted are less than the wave value of the point below the point to be adjusted, and the wave value of the point below the point to be adjusted is greater than the wave value of the point to be adjusted, the point to be adjusted is determined to be the target point. When the wave values ​​of the two points below the point to be adjusted are less than the wave value of the point below the point to be adjusted, and the wave value of the point below the point to be adjusted is less than the wave value of the point to be adjusted, the point to be adjusted is determined to be the falling point.

6. The waveform adjustment method for improving signal resolution as described in claim 2, wherein, In step (C), the point to be adjusted is determined to be one of the rising point, the target point, and the falling point based on the wave value of the point above the point to be adjusted, the wave value of the point to be adjusted, and the wave value of the point below the point to be adjusted.

7. The waveform adjustment method for improving signal resolution as described in claim 6, wherein, In step (C), when the wave value of the point above the point to be adjusted is less than the wave value of the point to be adjusted, and the wave value of the point to be adjusted is less than the wave value of the point below the point to be adjusted, the point to be adjusted is determined to be the rising point. When the wave value of the point above the point to be adjusted is less than the wave value of the point to be adjusted, and the wave value of the point to be adjusted is greater than the wave value of the point below the point to be adjusted, the point to be adjusted is determined to be the target point. When the wave value of the point above the point to be adjusted is greater than the wave value of the point to be adjusted, and the wave value of the point to be adjusted is greater than the wave value of the point below the point to be adjusted, the point to be adjusted is determined to be the falling point.

8. The waveform adjustment method for improving signal resolution as described in claim 2, wherein, In step (C), the point to be adjusted is determined to be one of the rising point, the target point, and the falling point based on the wave values ​​of the two points above the point to be adjusted, the wave value of the point above the point to be adjusted, and the wave value of the point to be adjusted.

9. The waveform adjustment method for improving signal resolution as described in claim 8, wherein, In step (C), when the wave values ​​of the two points above the point to be adjusted are less than the wave value of the point above the point to be adjusted, and the wave value of the point above the point to be adjusted is less than the wave value of the point to be adjusted, the point to be adjusted is determined to be the rising point. When the wave values ​​of the two points above the point to be adjusted are less than the wave value of the point above the point to be adjusted, and the wave value of the point above the point to be adjusted is greater than the wave value of the point to be adjusted, the point to be adjusted is determined to be the target point. When the wave values ​​of the two points above the point to be adjusted are greater than the wave value of the point above the point to be adjusted, and the wave value of the point above the point to be adjusted is greater than the wave value of the point to be adjusted, the point to be adjusted is determined to be the falling point.

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