Signal synthesis method and system based on dual-channel magnetic antenna, and storage medium

Abstract

The invention discloses a signal synthesis method based on a dual-channel magnetic antenna. The method comprises the following steps: S1, acquiring two groups of antenna signals through an ADC (Analog to Digital Converter); s2, independently searching the maximum peak value in the sampling data by each group of antennas, and calculating the peak value ratio of the two groups of antennas; s3, determining an incident angle according to a peak ratio result; s4, judging the phase of each group of antennas, and determining the quadrant of the incident angle according to the result of the antenna phase, thereby determining the range of the signal incident angle; and S5, according to the signal incident angle and the coefficient values synthesized by the two groups of signals, carrying out coefficient multiplication and adding to obtain a final synthesized signal. A single group of electric antennas is replaced by double groups of magnetic antennas to receive long-wave time service signals and synthesize the signals, and the magnetic antennas have stronger penetrating power in urban environments, mountainous areas and other places, so that the Roland C receiver equipped with the magnetic antennas is more suitable for land mobile application. The problem that a single group of magnetic antennas cannot realize omnidirectional receiving of an electric antenna is solved, and omnidirectional signal receiving of the magnetic antenna is realized.

Description

Technical Field

[0004] The present invention belongs to the technical field of signal synthesis, and in particular relates to a signal synthesis method, system and storage medium based on a dual-channel magnetic antenna. Background Art

[0005] Electric antennas are easily affected by water and static electricity, and have poor anti-noise performance. Electric antennas require good grounding, which is difficult to achieve in mobile applications (such as cars or ships). In addition, the broadband characteristics of electric antennas cause intermodulation problems. The use of magnetic antennas can solve the above problems, but currently a single set of electric antennas cannot achieve omnidirectional reception when in use. Therefore, this application proposes a signal synthesis method based on a dual-channel magnetic antenna to achieve the function of omnidirectional signal reception. Summary of the invention

[0006] The object of the present invention is to provide a signal synthesis method based on a dual-channel magnetic antenna to realize the signal synthesis of the dual-channel magnetic antenna and realize the omnidirectional signal receiving function.

[0007] In order to solve the above problems, the present invention discloses a signal synthesis method based on a dual-channel magnetic antenna, comprising:

[0008] S1, two groups of antenna signals are collected through ADC respectively;

[0009] S2, each group of antennas independently searches for the maximum peak value in the sampled data, and calculates the peak ratio of the two groups of antennas;

[0010] S3. Determine the incident angle according to the peak ratio result;

[0011] S4, judging the phase of each group of antennas, and determining the quadrant of the incident angle according to the result of the antenna phase, thereby determining the range of the signal incident angle;

[0012] S5. The final synthesized signal is obtained by multiplying and adding the coefficients synthesized by the signal incident angle and the two groups of signals.

[0013] Preferably, calculating the synthesis coefficient according to the incident angle to perform signal synthesis includes:

[0014] S=A*cos(α)+B*sin(α)

[0015] Where S is the incident signal, A is the signal received by the first set of antennas, B is the signal received by the second set of antennas, and α is the angle between the incident signal and the antenna direction.

[0016] Preferably, the two groups of antenna signals collect signals through ADC respectively, including: the two groups of antenna signals are independently sampled through their respective ADCs, and each performs signal search to determine the tracking point, and when one group of signals completes the tracking point determination, the other group of signals stops signal search.

[0017] Preferably, each group of antennas independently searches for the maximum peak value in the sampled data and calculates the peak ratio of the two groups of antennas, including: when the tracking point is determined, searching for the maximum amplitude value of the two groups of signals and comparing them, and the signal with the larger amplitude value is used as the reference signal as the reference for subsequent signal synthesis.

[0018] Preferably, the method further includes: entering a phase tracking stage, synthesizing signals with reference signals as a standard, and determining the sign bit of the synthesis coefficient according to the absolute phase of the reference signal and the relative phase of the non-reference signal.

[0019] Preferably, it also includes: the coefficient size of the synthetic signal is calculated by the peak ratio of the two groups of signals, the same peak ratio corresponds to different angles in different quadrants, so there are four possible angle values, and the quadrant is determined by the absolute phase of the two groups of channels.

[0020] Preferably, the method further includes: accumulating the synthetic signal to improve the signal-to-noise ratio, and when the number of accumulations is reached, adjusting the tracking point and finally judging the phase of the synthetic signal, thereby determining the quadrant of the incident signal and obtaining the signal incident angle.

[0021] Preferably, the method further includes: updating the sign bit of the synthesized signal according to the calculation result of the signal incident angle in the previous step and synthesizing to obtain a correct incident signal waveform.

[0022] On the other hand, the present application proposes a system for implementing a signal synthesis method based on a dual-channel magnetic antenna, comprising:

[0023] The antenna module includes two sets of mutually orthogonal magnetic antennas and is configured to receive long-wave timing signals;

[0024] The signal synthesis module is configured to synthesize the signals of the two groups of magnetic antennas, including:

[0025] A signal acquisition unit is configured to sample data through an ADC;

[0026] A signal processing unit is configured to search for a maximum peak value in the sampled data, calculate a peak ratio of the two antenna groups, and determine a signal incident angle;

[0027] The signal synthesis unit is configured to obtain coefficient values ​​according to the signal incident angle, and obtain a final synthesized signal by multiplying and adding the coefficients.

[0028] On the other hand, the present application also proposes an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the signal synthesis method based on the dual-channel magnetic antenna when executing the computer program.

[0029] On the other hand, the present application further proposes a storage medium, wherein the computer-readable storage medium stores a computer program, and when the program is executed by a processor, the signal synthesis method based on the dual-channel magnetic antenna is implemented.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] The present invention replaces the single electric antenna with a dual magnetic antenna to receive long-wave timing signals and synthesize the signals, achieving the same effect as the single electric antenna in receiving signals omnidirectionally. The magnetic antenna has stronger penetration in urban environments and mountainous areas, which makes the Loran C receiver equipped with the magnetic antenna more suitable for land mobile applications. The magnetic antenna does not need to be grounded, which makes it very suitable for GPS antenna integration. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic diagram of the layout of the magnetic antenna of the present invention;

[0033] Figure 2 It is a schematic diagram of incident signal and antenna angle of the present invention;

[0034] Figure 3 is a graph showing the relationship between the incident signal angle α and the magnetic antenna gain of the present invention;

[0035] Figure 4 is a diagram showing the relationship between the signal incident angle and the phase of the present invention;

[0036] Figure 5 It is a simplified flow chart of signal synthesis of the present invention;

[0037] Figure 6 It is the signal synthesis vector diagram of the present invention;

[0038] Figure 7 It is a complete flow chart of signal synthesis of the present invention. DETAILED DESCRIPTION

[0039] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0040] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] like Figure 1 As shown in FIG. 1 , the layout diagram of the magnetic antenna of the present invention is shown. The magnetic antenna is directional. A single set of magnetic antennas cannot receive omnidirectional signals. Therefore, two sets of mutually orthogonal antennas are required to receive omnidirectional signals. The magnetic antenna uses two mutually perpendicular antennas to receive long-wave timing signals.

[0044] like Figure 2 As shown in Figure 1, in order to achieve the same omnidirectional signal reception effect as the electric antenna, the two groups of signals need to be synthesized. Let the angle between the incident signal and the magnetic antenna direction be α.

[0045] The incident signal angle α and the magnetic antenna gain have the following characteristics: Figure 3 The relationship between the incident signal angle α and the signal phase is shown as Figure 4 shown.

[0046] Signal synthesis is performed using linear superposition, based on Figure 3 and Figure 4 The relationship between the signal incident angle, gain and phase. The detailed process of signal synthesis is as follows: Figure 5 The specific implementation steps are as follows:

[0047] 1. Two sets of antenna signals are sampled through ADC data.

[0048] 2. Each group of antennas independently searches for the maximum peak in the sampled data and calculates the peak ratio of the two groups of antennas.

[0049] 3. According to the peak ratio results, Figure 3 Four possible angles of incidence can be determined.

[0050] 4. Determine the phase of each antenna group, and according to the results of the antenna phase, Figure 4 The quadrant of the incident angle can be determined in the , thereby determining the range of the signal incident angle.

[0051] 5. Combined with the signal incident angle Figure 3 and Figure 4 The coefficient values ​​of the synthesis of the two sets of signals are obtained, and the final synthesized signal is obtained by multiplying and adding the coefficients.

[0052] The core of signal synthesis lies in the calculation of the signal incident angle. Signal synthesis is achieved by using vector synthesis. Figure 6 It is a schematic diagram of signal vector synthesis.

[0053] The incident signal synthesis can be calculated by the following formula, where S is the incident signal, A is the signal received by the first group of antennas, B is the signal received by the second group of antennas, and α is the angle between the incident signal and the antenna direction.

[0054] S=A*cos(α)+B*sin(α)

[0055] like Figure 7 As shown, the signal incident angle calculation method and synthesis method are as follows:

[0056] 1. The two antenna signals are sampled independently by their respective ADCs, and each performs signal search to determine the tracking point. When one set of signals completes the tracking point determination, the other set of signals stops signal search.

[0057] 2. When the tracking point is determined, search for the maximum amplitude value of the two groups of signals and compare them. The signal with the larger amplitude value is used as the reference signal and as the basis for subsequent signal synthesis.

[0058] 3. Enter the phase tracking stage and synthesize the signal with the reference signal as the standard. Determine the sign bit of the synthesis coefficient according to the absolute phase of the reference signal and the relative phase of the non-reference signal.

[0059] 4. The coefficient size of the synthetic signal is calculated by the peak ratio of the two groups of signals. The same peak ratio corresponds to different angles in different quadrants, so there are four possible angle values. The quadrant is determined by the absolute phase of the two groups of channels.

[0060] 5. Accumulate the composite signal to improve the signal-to-noise ratio. When the number of accumulations is reached, adjust the tracking point and finally determine the phase of the composite signal, and then determine the quadrant of the incident signal and obtain the signal incident angle.

[0061] 6. Based on the calculation result of the signal incident angle in the previous step, update the sign bit of the synthesized signal and synthesize to obtain the correct incident signal waveform.

[0062] Compared with the prior art: the present invention replaces the single electric antenna with a dual magnetic antenna to receive the long-wave timing signal and synthesize the signal, achieving the same effect as the single electric antenna receiving the signal omnidirectionally. The dual-channel magnetic antenna synthesis method solves the problem that the single magnetic antenna cannot achieve omnidirectional reception of the electric antenna, and achieves omnidirectional signal reception of the magnetic antenna.

[0063] The above is only an embodiment of the present invention, and the common sense such as the known specific structure and characteristics in the scheme is not described in detail here. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the attached claims rather than the above description, so it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

Claims

1. A signal synthesis method based on a dual-channel magnetic antenna, characterized in that: include: S1, two groups of antenna signals are collected through ADC respectively; S2, each group of antennas independently searches for the maximum peak value in the sampled data, and calculates the peak ratio of the two groups of antennas; S3. Determine the incident angle according to the peak ratio result; S4, judging the phase of each group of antennas, and determining the quadrant of the incident angle according to the result of the antenna phase, thereby determining the range of the signal incident angle; S5. The final synthesized signal is obtained by multiplying and adding the coefficients synthesized by the signal incident angle and the two groups of signals.

2. The signal synthesis method based on the dual-channel magnetic antenna according to claim 1, characterized in that: The step of calculating a synthesis coefficient according to the incident angle to perform signal synthesis includes: S=A*cos(α)+B*sin(α) Where S is the incident signal, A is the signal received by the first set of antennas, B is the signal received by the second set of antennas, and α is the angle between the incident signal and the antenna direction.

3. The signal synthesis method based on the dual-channel magnetic antenna according to claim 2 is characterized in that: The two groups of antenna signals collect signals through ADC respectively, including: the two groups of antenna signals are independently sampled through their respective ADCs, and each performs signal search to determine the tracking point, and when one group of signals completes the tracking point determination, the other group of signals stops signal search.

4. The signal synthesis method based on the dual-channel magnetic antenna according to claim 3 is characterized in that: Each group of antennas independently searches for the maximum peak value in the sampled data and calculates the peak ratio of the two groups of antennas, including: when the tracking point is determined, searching for the maximum amplitude value of the two groups of signals and comparing them, and the signal with the larger amplitude value is used as the reference signal as the reference for subsequent signal synthesis.

5. The signal synthesis method based on dual-channel magnetic antenna according to claim 4, characterized in that: Also includes: Entering the phase tracking stage, the reference signal is used as the standard for signal synthesis, and the sign bit of the synthesis coefficient is determined according to the absolute phase of the reference signal and the relative phase of the non-reference signal.

6. The signal synthesis method based on dual-channel magnetic antenna according to claim 5, characterized in that: Also includes: The coefficient size of the synthetic signal is calculated by the peak ratio of the two groups of signals. The same peak ratio corresponds to different angles in different quadrants, so there are four possible angle values. The quadrant is determined by the absolute phase of the two groups of channels.

7. The signal synthesis method based on dual-channel magnetic antenna according to claim 5, characterized in that: Also includes: The synthetic signal is accumulated to improve the signal-to-noise ratio. When the number of accumulations is reached, the tracking point is adjusted and the phase of the synthetic signal is finally determined to determine the quadrant of the incident signal and obtain the signal incident angle.

8. The signal synthesis method based on dual-channel magnetic antenna according to claim 5, characterized in that: Also includes: According to the calculation result of the signal incident angle in the previous step, the sign bit of the synthesized signal is updated and synthesized to obtain the correct incident signal waveform.

9. A signal synthesis system based on a dual-channel magnetic antenna as claimed in any one of claims 1 to 8, characterized in that: include: The antenna module includes two sets of mutually orthogonal magnetic antennas and is configured to receive long-wave timing signals; The signal synthesis module is configured to synthesize the signals of the two groups of magnetic antennas, including: A signal acquisition unit is configured to sample data through an ADC; A signal processing unit is configured to search for a maximum peak value in the sampled data, calculate a peak ratio of the two antenna groups, and determine a signal incident angle; The signal synthesis unit is configured to obtain coefficient values ​​according to the signal incident angle, and obtain a final synthesized signal by multiplying and adding the coefficients.

10. A storage medium, characterized in that: The storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 8 are implemented.

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