A method, system and device for multi-path parallel processing in a power line scenario and an intelligent fusion terminal

Abstract

The application relates to the technical field of communication signal processing, and relates to a multi-path parallel processing method, system and device under a power line scene and an intelligent fusion terminal. The multi-path parallel processing method under the power line scene comprises the following steps: acquiring time domain receiving signals of three-phase paths after frame synchronization; performing discrete Fourier transform and channel equalization on receiving signals corresponding to each phase path of a frame control symbol of the three-phase path time domain, so as to obtain a frame control symbol; using a maximum ratio combination algorithm to combine the frame control symbols of the three-phase paths, so as to obtain a combined path equalization signal; performing demodulation and channel decoding on the frame control symbol and performing demodulation and channel decoding on the combined path equalization signal, so as to obtain a decoding result; and determining a combination mode of a load data symbol according to the decoding result. The application can improve the decoding accuracy of the load data symbol.

Description

Technical Field

[0001] This application relates to the field of communication signal processing technology, and in particular to a method, system, device and intelligent fusion terminal for multi-channel parallel processing in power line scenarios. Background Technology

[0002] Power line communication (PLC) is a technology that uses existing power line infrastructure for data transmission. PLC systems are widely used in smart grids, smart homes, and other fields because they require no additional wiring. Orthogonal frequency division multiplexing (OFDM) has good resistance to frequency-selective fading, and therefore is widely used in PLC systems.

[0003] In common three-phase power line communication systems, the receiving end typically receives signals from phases A, B, and C. Traditional processing methods often involve simply combining these three signals, such as equal-gain combining or maximum-ratio combining, and then demodulating and decoding the combined single signal. However, in scenarios with user interference or decoding errors in some three-phase control symbols, the current simple combining method in PLC systems is susceptible to interference from interfering users or decoding errors in the phases, thus reducing system performance. Summary of the Invention

[0004] This application aims to at least solve the technical problems existing in the prior art, and to provide a method, system, device and intelligent fusion terminal for multi-channel parallel processing in power line scenarios.

[0005] Firstly, this application provides a method for multi-path parallel processing in a power line scenario, the method comprising: Acquire the time-domain received signal of the three-phase path after frame synchronization; The frame control symbols are obtained by performing discrete Fourier transform and channel equalization on the received signals corresponding to each phase of the three-phase time-domain frame control symbols. The frame control symbols of the three-phase path are combined using the maximum ratio combining algorithm to obtain the combined path equalization signal; Demodulate and channel decode the frame control symbols, and demodulate and channel decode the combined path equalization signal to obtain the decoding result; The method for merging payload data symbols is determined based on the decoding results.

[0006] Secondly, this application provides a multi-path parallel processing system for power line scenarios, the system comprising: The acquisition module is used to acquire the three-phase path time-domain received signal after frame synchronization; The first processing module is used to perform discrete Fourier transform and channel equalization on the received signal corresponding to each phase of the three-phase time-domain frame control symbol to obtain the frame control symbol. The merging module is used to merge the frame control symbols of the three-phase path using the maximum ratio merging algorithm to obtain the equalized signal of the merged path; The decoding module is used to demodulate and channel decode the frame control symbols, as well as to demodulate and channel decode the combined path equalization signal, to obtain the decoding result; The output module is used to determine the merging method of payload data symbols based on the decoding results.

[0007] Thirdly, this application provides an electronic device, the electronic device comprising: At least one processor; and, A memory communicatively connected to the at least one processor; wherein, The memory stores a computer program that can be executed by the at least one processor, which enables the at least one processor to perform the multi-parallel processing method in the power line scenario described above.

[0008] Fourthly, this application also provides an intelligent fusion terminal, comprising: The interface module is used to receive initial three-phase power line data; The control module is used to control the exchange and communication of initial power line data; The communication module is used to process the received initial three-phase power line data according to the multi-parallel processing method in the power line scenario described above. The storage module is used to temporarily store initial power line data, intermediate data, and / or software programs for multi-parallel processing methods in power line scenarios.

[0009] In summary, this application includes the following beneficial technical effects: This application constructs multiple parallel decoding paths by independently equalizing, demodulating, and decoding the three-phase signals, while simultaneously generating a combined signal with the maximum ratio and performing the same processing. The decoding result of the frame control symbols (whose correctness can be verified) is used to intelligently decide the merging method for subsequent payload data. This enables the system to identify and avoid phases with decoding errors or strong interference. In scenarios where one or more three-phase paths experience decoding errors or signal quality degradation due to user interference, this application can dynamically select the optimal one or more signals for re-merging, reducing the possibility of erroneous phases contaminating the final result and improving the decoding accuracy of frame control symbols. Attached Figure Description

[0010] Figure 1A flowchart illustrating a multi-parallel processing method in a power line scenario provided in an embodiment of this application; Figure 2 This is a frame structure diagram of the time-domain received signal in a power line scenario. Figure 3 A flowchart illustrating the specific judgment process of a multi-parallel processing method in a power line scenario provided in an embodiment of this application; Figure 4 Bit error rate curve of a multi-path parallel processing method in a power line scenario provided in an embodiment of this application; Figure 5 This is a schematic diagram of the structure of an electronic device that implements the multi-parallel processing method in the power line scenario according to an embodiment of this application.

[0011] Reference numerals: 10, processor; 11, memory; 12, communication bus; 13, communication interface.

[0012] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0013] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0014] In the description of this application, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0015] In the description of this application, unless otherwise specified and limited, it should be noted that the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, or internal connections between two components. They can be direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0016] Reference Figure 1 In this embodiment, the multi-path parallel processing method in the power line scenario includes: S1. Obtain the three-phase time-domain received signal after frame synchronization.

[0017] The three-phase path time-domain received signal originates from the three phases of the power line channel. The three-phase path time-domain received signal consists of time-domain signals received through phases A, B, and C of the power line channel, respectively. In this embodiment, the time-domain received signal is an OFDM symbol, and the time-domain received signal for each phase path includes a preamble symbol, a frame control symbol, and a payload data symbol. The time-domain received signal is composed of the preamble symbol, frame control symbol, and payload data symbol in sequence. The preamble symbol is used for frame synchronization.

[0018] refer to Figure 2 , Figure 2 This is a frame structure diagram of the received signal in a power line scenario. The preamble symbol is a pilot sequence known to both the transmitter and receiver, used for received packet detection, timing synchronization, and channel estimation.

[0019] S2. Perform Discrete Fourier Transform and Channel Equalization on the received signal corresponding to each phase of the three-phase time-domain frame control symbol to obtain the frame control symbol.

[0020] The frame control symbols carry the payload data modulation and coding information and system information, while the payload data symbols are the transmitted data.

[0021] After performing Discrete Fourier Transform on the received signals of the three-phase time-domain frame control symbols following frame synchronization, the frequency-domain received signal is obtained; the expression for the frequency-domain received signal is: ; in, Indicates the received signal in the frequency domain. Indicates the subcarrier number. Indicates the number of subcarriers. Indicates the frame control symbol number, Indicates the number of frame control symbols. Indicates the signal number received by the three-phase path. Indicates the first road signal number The first frame control symbol Frequency domain symbols transmitted by each subcarrier, Indicates the first road signal number Frequency domain channel response of each subcarrier Indicates the first road signal number The first frame control symbol Channel noise of each subcarrier.

[0022] After channel equalization, the first road signal number The first frame control symbol Frequency domain symbols received by each subcarrier The expression is: ; in Indicates the first road signal number The frequency domain channel response estimate of each subcarrier.

[0023] S3. Use the maximum ratio merging algorithm to merge the frame control symbols of the three-phase path to obtain the merged path equalization signal.

[0024] Specifically, the maximum ratio combining algorithm is used to combine the frame control symbols of the three-phase paths to obtain the combined path equalization signal, including: S31. For the frame control symbols of each of the three-phase paths, merge all the frame control symbols in each path to obtain merged frame control symbols.

[0025] It should be added that before merging multiple frame control symbols, the receiving end needs to restore the cyclic shift on each symbol to its original alignment state. For each received frame control symbol, according to the shift rules agreed upon by the sending end, it is reverse cyclically shifted (also known as de-shifting or de-shifting) so that all symbols correspond to the same information bit originally transmitted at the same subcarrier position.

[0026] The merged first road signal number Frequency domain frame control symbols received by each subcarrier The expression is: .

[0027] S32. Combine the control symbols of the corresponding multiple merged frames with the maximum ratio to obtain the equalized signal of the merged path, where the merged path's first... Frequency domain frame control symbols received by each subcarrier : in, Indicates the control symbol for merging frames. Indicates the first The weighting factors of the road signals satisfy: .

[0028] S4. Demodulate and channel decode the frame control symbols, and demodulate and channel decode the combined path equalization signal to obtain the decoding result.

[0029] Assume the modulation order is That is, one frequency domain symbol is generated. The soft information value, after demodulation, is the first... Frame control symbol number Soft information of each subcarrier The expression is: in This represents the demodulation function, which is implemented by calculating the Euclidean distance between the input frequency domain received signal and the decision threshold.

[0030] The demodulated soft information is input into the channel decoder, assuming the channel coding rate is... The number of bits after decoding is Then the first The decoding bits of the road frame control symbol are: .

[0031] S5. Determine the merging method of payload data symbols based on the decoding results.

[0032] Reference Figure 3 Specifically, through the first The correctness of the decoding of the road frame control symbols determines the processing method of the load data in the three-phase road signal. In this embodiment, the specific steps for determining the merging method of load data symbols based on the decoding results include: If all three-phase path frame control symbols are decoded correctly and the merged path is decoded correctly, then at least two signals with the same decoded bit value in the three-phase path frame control symbols are selected for re-merging, and then the re-merged load data is processed. If all three-phase path frame control symbols are decoded correctly, but the merged path is decoded incorrectly, then a merging anomaly is reported. If all three-phase road frame control symbols are decoded incorrectly, but the merged road is decoded correctly, then process the load data of the merged road. If all three-phase path frame control symbols are decoded incorrectly, and the merged path is decoded incorrectly, then the reported data is incorrect. If the three-phase frame control symbol decoding is correct or incorrect, at least two signals with correct frame control symbol decoding and identical decoding bits are selected for re-merging, and then the re-merged load data is processed.

[0033] The performance of the multi-parallel processing method in the power line scenario of this application is verified below. Figure 4 The bit error rate curve of a multi-channel parallel processing method provided in an embodiment of this application. From... Figure 4 As can be seen, the multi-path parallel processing method provided in one embodiment of this application, compared with the traditional merging processing method, has a lower bit error rate. The performance was improved by 0.8 to 1 dB.

[0034] Based on the same inventive concept, one embodiment of this application provides a multi-parallel processing system for power line scenarios.

[0035] The multi-channel parallel processing system for power line scenarios described in this application can be installed in an electronic device. Depending on the functions implemented, the multi-channel parallel processing system for power line scenarios includes: The acquisition module is used to acquire the three-phase path time-domain received signal after frame synchronization; The first processing module is used to perform discrete Fourier transform and channel equalization on the received signal corresponding to each phase of the three-phase time-domain frame control symbol to obtain the frame control symbol. The merging module is used to merge the frame control symbols of the three-phase path using the maximum ratio merging algorithm to obtain the equalized signal of the merged path; The decoding module is used to demodulate and channel decode the frame control symbols, as well as to demodulate and channel decode the combined path equalization signal, to obtain the decoding result; The output module is used to determine the merging method of payload data symbols based on the decoding results.

[0036] The module described in this application can also be called a unit, which refers to a series of computer program segments that can be executed by the processor of an electronic device and can perform a fixed function, and are stored in the memory of the electronic device.

[0037] The various variations and specific examples of the multi-path parallel processing method in the power line scenario provided in the above embodiments are also applicable to the multi-path parallel processing system in the power line scenario of this embodiment. Through the foregoing detailed description of the multi-path parallel processing method in the power line scenario, those skilled in the art can clearly understand the implementation method of the multi-path parallel processing system in the power line scenario of this embodiment. For the sake of brevity, it will not be described again here.

[0038] This application also discloses an intelligent fusion terminal, including: The interface module is used to receive initial three-phase power line data; The control module is used to control the exchange and communication of initial power line data; The communication module is used to process the received initial three-phase power line data in the above-mentioned multi-parallel processing method in the power line scenario. The storage module is used to temporarily store initial power line data, intermediate data, and / or software programs for multi-parallel processing methods in power line scenarios.

[0039] This application also discloses an electronic device, such as Figure 5The diagram shown is a schematic representation of an electronic device for a method of multi-path parallel processing in a power line scenario according to an embodiment of this application. The electronic device may include at least one processor 10, a memory 11 communicatively connected to the at least one processor, a communication bus 12, and a communication interface 13. It may also include a computer program, such as a method program for multi-path parallel processing in a power line scenario, stored in the memory 11 and executable on the processor 10.

[0040] In some embodiments, the processor 10 may be composed of integrated circuits, such as a single packaged integrated circuit or multiple integrated circuits with the same or different functions, including combinations of one or more central processing units (CPUs), microprocessors, digital processing chips, graphics processors, and various control chips. The processor 10 is the control unit of the electronic device, connecting various components of the entire electronic device through various interfaces and lines. It executes programs or modules stored in the memory 11 (e.g., methods for multi-channel parallel processing in power line scenarios) and calls data stored in the memory 11 to perform various functions of the electronic device and process data.

[0041] The memory 11 includes at least one type of readable storage medium, including flash memory, portable hard drive, multimedia card, card-type memory (e.g., SD or DX memory), magnetic memory, magnetic disk, optical disk, etc. In some embodiments, the memory 11 can be an internal storage unit of an electronic device, such as a portable hard drive. In other embodiments, the memory 11 can be an external storage device of the electronic device, such as a plug-in portable hard drive, Smart Media Card (SMC), Secure Digital (SD) card, Flash Card, etc. Furthermore, the memory 11 can include both internal and external storage units of the electronic device. The memory 11 can be used not only to store application software and various types of data installed on the electronic device, such as code for methods of multi-channel parallel processing in power line scenarios, but also to temporarily store data that has been output or will be output.

[0042] The communication bus 12 can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. This bus can be divided into an address bus, a data bus, a control bus, etc. The bus is configured to enable communication between the memory 11 and at least one processor 10, etc.

[0043] Communication interface 13 is used for communication between the aforementioned electronic device and other devices, including a network interface and a user interface. Optionally, the network interface may include a wired interface and / or a wireless interface (such as a Wi-Fi interface, Bluetooth interface, etc.), typically used to establish communication connections between the electronic device and other electronic devices. The user interface may be a display, an input unit (such as a keyboard), and optionally, a standard wired or wireless interface. Optionally, in some embodiments, the display may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, or an OLED (Organic Light-Emitting Diode) touchscreen, etc. The display may also be appropriately referred to as a screen or display unit, used to display information processed in the electronic device and to display a visual user interface.

[0044] Figure 5 Only electronic devices with components are shown; it will be understood by those skilled in the art that... Figure 5 The structure shown does not constitute a limitation on the electronic device and may include fewer or more components than shown, or combine certain components, or have different component arrangements.

[0045] For example, although not shown, the electronic device may also include a power supply (such as a battery) to power various components. Preferably, the power supply can be logically connected to at least one processor 10 via a power management device, thereby enabling functions such as charging management, discharging management, and power consumption management. The power supply may also include one or more DC or AC power supplies, recharging devices, power fault detection circuits, power converters or inverters, power status indicators, and other arbitrary components. The electronic device may also include various sensors, Bluetooth modules, Wi-Fi modules, etc., which will not be elaborated further here.

[0046] It should be understood that the embodiments are for illustrative purposes only and are not limited to this structure in the scope of the patent application.

[0047] Furthermore, if the modules / units integrated into the electronic device are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. The computer-readable storage medium can be volatile or non-volatile.

[0048] This application provides a computer-readable storage medium, including, for example, any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a portable hard drive, a magnetic disk, an optical disk, a computer memory, or a read-only memory (ROM). The computer-readable storage medium stores a computer program that can be loaded by a processor and execute the multi-channel parallel processing method for power line scenarios described in the above embodiments.

[0049] In the description of this specification, the references to terms such as "an embodiment," "some embodiments," "example," "specific example," "a implementation," "a preferred implementation," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0050] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A method for multi-path parallel processing in a power line scenario, characterized in that, The method includes: Acquire the time-domain received signal of the three-phase path after frame synchronization; The frame control symbols are obtained by performing discrete Fourier transform and channel equalization on the received signals corresponding to each phase of the three-phase time-domain frame control symbols. The frame control symbols of the three-phase path are combined using the maximum ratio combining algorithm to obtain the combined path equalization signal; Demodulate and channel decode the frame control symbols, and demodulate and channel decode the combined path equalization signal to obtain the decoding result; The method for merging payload data symbols is determined based on the decoding results.

2. The multi-path parallel processing method in the power line scenario as described in claim 1, characterized in that, The three-phase path time-domain received signals are time-domain signals received through the A-phase, B-phase, and C-phase lines of the power line channel, respectively; the time-domain received signal of each phase path includes a preamble symbol, a frame control symbol, and a payload data symbol.

3. The multi-path parallel processing method in the power line scenario as described in claim 1 or 2, characterized in that, After performing Discrete Fourier Transform on the received signals of the three-phase time-domain frame control symbols, the frequency-domain received signals are obtained; the expression for the frequency-domain received signals is as follows: ； in, Indicates the received signal in the frequency domain. Indicates the subcarrier number. Indicates the number of subcarriers. Indicates the frame control symbol number, Indicates the number of frame control symbols. Indicates the signal number received by the three-phase path. Indicates the first road signal number The first frame control symbol Frequency domain symbols transmitted by each subcarrier, Indicates the first road signal number Frequency domain channel response of each subcarrier Indicates the first road signal number The first frame control symbol Channel noise of each subcarrier.

4. The multi-path parallel processing method in the power line scenario as described in claim 3, characterized in that, After channel equalization, the first road signal number The first frame control symbol Frequency domain symbols received by each subcarrier The expression is: ； in Indicates the first road signal number The frequency domain channel response estimate of each subcarrier.

5. The multi-path parallel processing method in a power line scenario as described in claim 1, characterized in that, The process of combining the frame control symbols of the three-phase paths using the maximum ratio combining algorithm to obtain the combined path equalization signal includes: For each of the three-phase paths, all frame control symbols in each path are merged to obtain merged frame control symbols. The maximum ratio of the control symbols of the multiple corresponding merged frames is combined to obtain the equalized signal of the merged path, where the merged path's first... Frequency domain frame control symbols received by each subcarrier : in, Indicates the control symbol for merging frames. Indicates the first The weighting factors of the road signals satisfy: 。 6. The multi-path parallel processing method in the power line scenario as described in claim 1, characterized in that, The method for determining the merging method of payload data symbols based on the decoding results specifically includes: If all three-phase path frame control symbols are decoded correctly and the merged path is decoded correctly, then at least two signals with the same decoded bit value in the three-phase path frame control symbols are selected for re-merging, and then the re-merged load data is processed. If all three-phase path frame control symbols are decoded correctly, but the merged path is decoded incorrectly, then a merging anomaly is reported. If all three-phase road frame control symbols are decoded incorrectly, but the merged road is decoded correctly, then process the load data of the merged road. If all three-phase path frame control symbols are decoded incorrectly, and the merged path is decoded incorrectly, then the reported data is incorrect. If the three-phase frame control symbol decoding is correct or incorrect, at least two signals with correct frame control symbol decoding and identical decoding bits are selected for re-merging, and then the re-merged load data is processed.

7. A multi-path parallel processing system for power line scenarios, used to implement the multi-path parallel processing method for power line scenarios as described in any one of claims 1 to 6, characterized in that, include: The acquisition module is used to acquire the three-phase path time-domain received signal after frame synchronization; The first processing module is used to perform discrete Fourier transform and channel equalization on the received signal corresponding to each phase of the three-phase time-domain frame control symbol to obtain the frame control symbol. The merging module is used to merge the frame control symbols of the three-phase path using the maximum ratio merging algorithm to obtain the equalized signal of the merged path; The decoding module is used to demodulate and channel decode the frame control symbols, as well as to demodulate and channel decode the combined path equalization signal, to obtain the decoding result; The output module is used to determine the merging method of payload data symbols based on the decoding results.

8. An electronic device, characterized in that, The electronic device includes: At least one processor (10); and, A memory (11) communicatively connected to the at least one processor (10); The memory (11) stores a computer program that can be executed by the at least one processor (10), which is executed by the at least one processor (10) to enable the at least one processor (10) to perform the multi-parallel processing method in the power line scenario as described in any one of claims 1 to 6.

9. A smart converged terminal, characterized in that, include: The interface module is used to receive initial three-phase power line data; The control module is used to control the exchange and communication of initial power line data; The communication module is used to process the received initial three-phase power line data in the power line scenario according to any one of claims 1 to 6. The storage module is used to temporarily store initial power line data, intermediate data, and / or software programs for multi-parallel processing methods in power line scenarios.

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