Satellite signal separation circuit, chip and receiver
By using bandpass filters and processing circuits in the satellite signal separation circuit, the problem of separating signals from different satellite systems in mixed satellite signals is solved, achieving a highly efficient signal separation effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-24
- Publication Date
- 2026-03-03
AI Technical Summary
Satellite signals from different satellite navigation systems overlap in frequency bands, and how to separate the satellite signals from each satellite navigation system from the mixed satellite signals received by the receiver has become an urgent problem to be solved.
A satellite signal separation circuit is adopted, including a hybrid satellite digital signal input terminal, a first bandpass filter, a second bandpass filter, a third bandpass filter, and a satellite signal processing circuit, which are used to separate GPS, BeiDou, and GLONASS satellite signals respectively. Signal separation is achieved by setting specific passband ranges and filter types (such as FIR filters).
It enables the effective separation of satellite signals from various satellite navigation systems from mixed satellite signals, improving the real-time performance and accuracy of signal processing.
Smart Images
Figure CN223966699U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of satellite communication, and in particular to satellite signal separation circuits, chips and receivers. Background Technology
[0002] With the widespread application of Global Navigation Satellite Systems (GNSS), multiple satellite navigation systems, including the US Global Positioning System (GPS), the BeiDou Navigation Satellite System, and the Russian Global Navigation Satellite System (GLONASS), provide users with a wealth of navigation and positioning services.
[0003] However, satellite signals from different satellite navigation systems overlap in frequency bands. The mixed satellite signals received by the receiver include satellite signals from multiple satellite navigation systems. How to separate the satellite signals from each satellite navigation system from the mixed satellite signals has become an urgent problem to be solved. Summary of the Invention
[0004] This invention provides a satellite signal separation circuit, chip, and receiver, which can separate satellite signals from various satellite navigation systems from mixed satellite signals.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] In a first aspect, a satellite signal separation circuit is provided, comprising: a hybrid satellite digital signal input terminal, a first bandpass filter, a second bandpass filter, a third bandpass filter, and a satellite signal processing circuit. The first bandpass filter is used to separate GPS satellite digital signals from the hybrid satellite digital signal, the second bandpass filter is used to separate BeiDou satellite digital signals from the hybrid satellite digital signal, and the third bandpass filter is used to separate GLONASS satellite digital signals from the hybrid satellite digital signal. The hybrid satellite digital signal input terminal is electrically connected to the first bandpass filter, the second bandpass filter, and the third bandpass filter, respectively. The first bandpass filter, the second bandpass filter, and the third bandpass filter are electrically connected to the satellite signal processing circuit, respectively.
[0007] Based on the satellite signal separation circuit provided by this utility model, the satellite signal separation circuit includes: a hybrid satellite digital signal input terminal, a first bandpass filter, a second bandpass filter, a third bandpass filter, and a satellite signal processing circuit. The hybrid satellite digital signal input terminal is electrically connected to the first bandpass filter, the second bandpass filter, and the third bandpass filter, respectively. The first bandpass filter, the second bandpass filter, and the third bandpass filter are electrically connected to the satellite signal processing circuit, respectively. Since the first bandpass filter is used to separate the GPS satellite digital signal from the hybrid satellite digital signal, the second bandpass filter is used to separate the BeiDou satellite digital signal from the hybrid satellite digital signal, and the third bandpass filter is used to separate the GLONASS satellite digital signal from the hybrid satellite digital signal, after the hybrid satellite digital signal is input to the first bandpass filter and processed by the first bandpass filter, it can output the GPS satellite data signal. After the hybrid satellite digital signal is input to the second bandpass filter and processed by the second bandpass filter, it can output the BeiDou satellite data signal. After the hybrid satellite digital signal is input to the third bandpass filter and processed by the third bandpass filter, it can output the GLONASS satellite data signal. Thus, the satellite signals of each satellite navigation system can be separated from the hybrid satellite signal.
[0008] In conjunction with the first aspect, in some embodiments of the first aspect, the passband range of the first bandpass filter is [1573.42MHz, 1577.42MHz].
[0009] In conjunction with the first aspect, in some embodiments of the first aspect, the passband range of the second bandpass filter is [1559.098MHz, 1563.098MHz].
[0010] In conjunction with the first aspect, in some embodiments of the first aspect, the passband range of the third bandpass filter is [1598MHz, 1606MHz].
[0011] In conjunction with the first aspect, in some embodiments of the first aspect, the satellite signal separation circuit further includes: a hybrid satellite analog signal input terminal and an analog-to-digital conversion circuit; the analog-to-digital conversion circuit is used to convert the hybrid satellite analog signal into a hybrid satellite digital signal; the hybrid satellite analog signal input terminal is electrically connected to the hybrid satellite digital signal input terminal through the analog-to-digital conversion circuit.
[0012] In conjunction with the first aspect, in some embodiments of the first aspect, the satellite signal processing circuit is a correlator circuit or a tracking loop circuit.
[0013] Secondly, a chip is provided, which includes the satellite signal separation circuit provided in the first aspect and any embodiment thereof.
[0014] Thirdly, a receiver is provided, which includes the chip provided in the second aspect. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of a satellite signal separation circuit provided by this utility model. Detailed Implementation
[0016] To facilitate a clear description of the technical solutions of the embodiments of this utility model, the terms "first" and "second" are used in the embodiments of this utility model to distinguish identical or similar items with essentially the same function and effect. Those skilled in the art will understand that the terms "first" and "second" do not limit the quantity or execution order, and the terms "first" and "second" are not necessarily different.
[0017] In this embodiment of the invention, the terms "exemplary" or "for example" are used to indicate that something is being described as an example, illustration, or description. Any embodiment or design described as "exemplary" or "for example" in this embodiment of the invention should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner for ease of understanding.
[0018] It is understood that the term "embodiment" used throughout the specification means that a specific feature, structure, or characteristic related to an embodiment is included in at least one embodiment of the present invention. Therefore, the various embodiments throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. It is understood that in the various embodiments of the present invention, the sequence number of each process does not imply the order of execution; the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.
[0019] It is understood that in this utility model, "when," "if," and "if" all refer to the corresponding processing that will be carried out under certain objective circumstances, and are not limited to a specific time, nor do they require a judgment action to be performed, nor do they imply any other limitations.
[0020] It is understood that some optional features in the embodiments of this utility model can be implemented independently in certain scenarios without relying on other features, such as the current solution on which they are based, to solve the corresponding technical problems and achieve the corresponding effects. Alternatively, they can be combined with other features as needed in certain scenarios. Correspondingly, the device given in the embodiments of this utility model can also implement these features or functions, which will not be elaborated here.
[0021] In this utility model, unless otherwise specified, the same or similar parts between the various embodiments can be referred to each other. In the various embodiments and implementation methods of this utility model, unless otherwise specified or logically conflicting, the terminology and / or descriptions between different embodiments and between the implementation methods of different embodiments are consistent and can be mutually referenced. The technical features in different embodiments and between the implementation methods of different embodiments can be combined according to their inherent logical relationships to form new embodiments, implementation methods, implementation methods, or implementation approaches. The following embodiments of this utility model do not constitute a limitation on the scope of protection of this utility model.
[0022] With the widespread application of Global Navigation Satellite Systems (GNSS), multiple satellite navigation systems, including the US Global Positioning System (GPS), the BeiDou Navigation Satellite System, and the Russian Global Navigation Satellite System (GLONASS), provide users with a wealth of navigation and positioning services.
[0023] However, satellite signals from different satellite navigation systems overlap in frequency bands. The mixed satellite signals received by the receiver include satellite signals from multiple satellite navigation systems. How to separate the satellite signals from each satellite navigation system from the mixed satellite signals has become an urgent problem to be solved.
[0024] To solve the above problems, this utility model provides a satellite signal separation circuit. Figure 1 This is a schematic diagram of the structure of a satellite signal separation circuit provided by this utility model, as shown below. Figure 1 As shown, the satellite signal separation circuit 10 includes: a hybrid satellite digital signal input terminal 101, a first bandpass filter 102, a second bandpass filter 103, a third bandpass filter 104, and a satellite signal processing circuit 105.
[0025] The first bandpass filter 102 is used to separate the GPS satellite digital signal in the mixed satellite digital signal, the second bandpass filter 103 is used to separate the Beidou satellite digital signal in the mixed satellite digital signal, and the third bandpass filter 104 is used to separate the GLONASS satellite digital signal in the mixed satellite digital signal.
[0026] The hybrid satellite digital signal input terminal 101 is electrically connected to the first bandpass filter 102, the second bandpass filter 103, and the third bandpass filter 104, respectively.
[0027] The first bandpass filter 102, the second bandpass filter 103, and the third bandpass filter 104 are electrically connected to the satellite signal processing circuit 105, respectively.
[0028] Among them, the hybrid satellite digital signal can be an intermediate frequency signal.
[0029] The center frequency of the GPS satellite signal in the L1 band is 1575.42MHz, and the bandwidth is 4MHz. The passband range of the first bandpass filter 102 is [1573.42MHz, 1577.42MHz]. The filter order of the first bandpass filter 102 can be 64th order, the coefficient bit width of the first bandpass filter 102 can be 12 bits, and the filter type of the first bandpass filter 102 can be an FIR filter.
[0030] The center frequency of the satellite signal of the BeiDou Navigation Satellite System in the L1 band is 1561.098MHz. The passband range of the second bandpass filter 103 is [1559.098MHz, 1563.098MHz]. The filter order of the second bandpass filter 103 can be 64th order, the coefficient bit width of the second bandpass filter 103 can be 12 bits, and the filter type of the second bandpass filter 103 can be an FIR filter.
[0031] The center frequency of the GLONASS satellite signal in the L1 band is 1602MHz. The passband range of the third bandpass filter 104 is [1598MHz, 1606Hz]. The filter order of the third bandpass filter 104 can be 64th order. The coefficient bit width of the second bandpass filter 103 can be 12 bits. The filter type of the third bandpass filter 104 can be an FIR filter.
[0032] When integrating the first, second, and third filters into the satellite signal separation circuit 10, hardware description languages (HDLs) such as Verilog or VHDL can be used to transform the first, second, and third filters into hardware circuit modules. This constructs a filter circuit structure including data storage units (such as register groups for temporarily storing sampled input signal data and filter coefficients), multiplication units, addition units, and control logic units. For example, a pipelined multiplier-accumulator can be used to accelerate the filtering process and improve the real-time performance of signal processing.
[0033] The satellite signal processing circuit 105 is a correlator circuit or a tracking loop circuit. It should be noted that specific descriptions of the correlator circuit or tracking loop circuit can be found in existing solutions, and will not be described in detail here.
[0034] Optional, such as Figure 1 As shown, the satellite signal separation circuit 10 also includes a hybrid satellite analog signal input terminal 106 and an analog-to-digital conversion circuit 107.
[0035] The analog-to-digital converter circuit 107 is used to convert hybrid satellite analog signals into hybrid satellite digital signals.
[0036] The hybrid satellite analog signal input terminal 106 is electrically connected to the hybrid satellite digital signal input terminal 101 through the analog-to-digital conversion circuit 107.
[0037] The hybrid satellite analog signal input terminal 106 may include a satellite signal receiving antenna or a preamplifier.
[0038] In this way, the input mixed satellite analog signal can be converted into a mixed satellite digital signal, so that subsequent bandpass filters can separate the corresponding satellite signals.
[0039] It should be noted that the specific description of the analog-to-digital conversion circuit 107 can be found in existing solutions, and will not be described in detail here.
[0040] Based on the satellite signal separation circuit 10 provided by this utility model, the satellite signal separation circuit 10 includes: a hybrid satellite digital signal input terminal 101, a first bandpass filter 102, a second bandpass filter 103, a third bandpass filter 104, and a satellite signal processing circuit 105. The hybrid satellite digital signal input terminal 101 is electrically connected to the first bandpass filter 102, the second bandpass filter 103, and the third bandpass filter 104, respectively. The first bandpass filter 102, the second bandpass filter 103, and the third bandpass filter 104 are electrically connected to the satellite signal processing circuit 105, respectively. Since the first bandpass filter 102 is used to separate the GPS satellite digital signal in the hybrid satellite digital signal, and the second bandpass filter 103 is used to separate the GPS satellite digital signal in the hybrid satellite digital signal, the second bandpass filter 103 is used to separate the GPS satellite digital signal in the hybrid satellite digital signal, and the third bandpass filter 104 is used to separate the GPS satellite digital signal in the hybrid satellite digital signal, the second bandpass filter 104 ... The third bandpass filter 104 is used to separate the BeiDou satellite digital signal from the mixed satellite digital signal. Therefore, after the mixed satellite digital signal is input into the first bandpass filter 102, it can output the GPS satellite data signal after processing by the first bandpass filter 102. After the mixed satellite digital signal is input into the second bandpass filter 103, it can output the BeiDou satellite data signal after processing by the second bandpass filter 103. After the mixed satellite digital signal is input into the third bandpass filter 104, it can output the GLONASS satellite data signal. It is possible to separate the satellite signals of each satellite navigation system from the mixed satellite signal.
[0041] This invention provides a chip, which includes the satellite signal separation circuit 10 described above.
[0042] The chip can be a GNSS positioning chip.
[0043] This utility model provides a receiver, which uses the aforementioned chip.
[0044] Although the present invention has been described herein in conjunction with various embodiments, those skilled in the art will understand and implement other variations of the disclosed embodiments by reviewing the accompanying drawings, the disclosure, and the appended claims in carrying out the claimed invention. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude a plurality. A single processor or other unit can implement several functions listed in the claims. While different dependent claims may recite certain measures, this does not mean that these measures cannot be combined to produce good results.
[0045] Although the present invention has been described in conjunction with specific features and embodiments, it is obvious that various modifications and combinations can be made thereto without departing from the spirit and scope of the present invention. Accordingly, this specification and drawings are merely exemplary descriptions of the present invention as defined by the appended claims, and are considered to cover any and all modifications, variations, combinations, or equivalents within the scope of the present invention. Clearly, those skilled in the art can make various alterations and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and modifications of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and modifications.
Claims
1. A satellite signal separating circuit, characterized by comprising: The satellite signal separation circuit comprises a mixed satellite digital signal input end, a first band-pass filter, a second band-pass filter, a third band-pass filter and a satellite signal processing circuit, the first band-pass filter is used for separating a GPS satellite digital signal in the mixed satellite digital signal, the second band-pass filter is used for separating a Beidou satellite digital signal in the mixed satellite digital signal, and the third band-pass filter is used for separating a GLONASS satellite digital signal in the mixed satellite digital signal. The mixed satellite digital signal input end is electrically connected with the first band-pass filter, the second band-pass filter and the third band-pass filter respectively. The first band-pass filter, the second band-pass filter and the third band-pass filter are electrically connected with the satellite signal processing circuit respectively.
2. The satellite signal separating circuit according to claim 1, characterized by The passband range of the first band-pass filter is [1573.42MHz, 1577.42MHz].
3. The satellite signal separating circuit according to claim 1, characterized by, The passband range of the second band-pass filter is [1559.098MHz, 1563.098MHz].
4. The satellite signal separating circuit according to claim 1, characterized by The passband range of the third band-pass filter is [1598MHz, 1606MHz].
5. The satellite signal separating circuit according to any one of claims 1 to 4, characterized by, The satellite signal separation circuit further comprises a mixed satellite analog signal input end and an analog-digital conversion circuit, and the analog-digital conversion circuit is used for converting the mixed satellite analog signal into the mixed satellite digital signal. The mixed satellite analog signal input end is electrically connected with the mixed satellite digital signal input end through the analog-digital conversion circuit.
6. The satellite signal separating circuit according to any one of claims 1 to 4, characterized by, The satellite signal processing circuit is a correlator circuit or a tracking loop circuit.
7. A chip, characterized by The chip comprises the satellite signal separation circuit according to any one of claims 1-6.
8. A receiver, characterized by The receiver comprises the chip according to claim 7.