Passive electronic tag decoding method, device, equipment, medium and product

Abstract

The invention discloses a passive electronic tag decoding method, device and equipment, a medium and a product. The method comprises the following steps: receiving a downlink signaling sent by a reader, and determining a coding mode of the downlink signaling; inputting the downlink signaling into a waveform sequence detection unit according to the coding mode, and determining a signal legality judgment result; if the signal is determined to be legal according to the signal legality judgment result, extracting a target waveform sequence in a calibrator, and performing matched filtering on the downlink signaling based on the target waveform sequence; if it is determined that the target judgment moment arrives according to the output signal of the symbol synchronization unit, the decoding result of the passive electronic tag is determined according to the matched filtering result. According to the technical scheme, the problem that the passive electronic tag data decoding anti-interference capability is poor is solved, the decoding result of the passive electronic tag is determined according to the matched filtering result of the target judgment moment, and the decoding sensitivity of the passive electronic tag is improved.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technology, and in particular to a decoding method, device, equipment, medium and product of a passive electronic tag. Background Art

[0002] At present, the representative technology of passive Internet of Things is Radio Frequency Identification (RFID) technology, the principle of which is to conduct non-contact data communication between the reader and the tag to achieve the purpose of identifying the target.

[0003] Passive electronic tags need to obtain energy from the radio frequency field generated by the reader. The communication distance is limited by the power supply method and energy conversion efficiency, and long-distance communication cannot be achieved. The communication distance is usually around twenty meters.

[0004] In order to ensure the success rate of passive electronic tag information reception, passive electronic tags are usually designed with low power consumption, and the data demodulation and decoding algorithm is very simple, resulting in abnormal decoding once the demodulated signal output by envelope detection has interference signals such as glitches, and the data decoding method has poor anti-interference ability. Summary of the invention

[0005] The present invention provides a decoding method, device, equipment, medium and product for a passive electronic tag to solve the problem of poor anti-interference ability of passive electronic tag data decoding. The decoding result of the passive electronic tag is determined according to the matched filtering result at the target decision moment, thereby improving the decoding sensitivity of the passive electronic tag.

[0006] According to one aspect of the present invention, a method for decoding a passive electronic tag is provided, the method comprising:

[0007] Receive downlink signaling sent by the reader, and determine the encoding method of the downlink signaling;

[0008] According to the encoding method, the downlink signaling is input into a waveform sequence detection unit to determine a signal legitimacy judgment result;

[0009] If the signal is determined to be legal according to the signal legality judgment result, extracting the target waveform sequence in the calibration symbol, and performing matched filtering on the downlink signaling based on the target waveform sequence;

[0010] If it is determined that the target decision time has arrived according to the output signal of the symbol synchronization unit, the decoding result of the passive electronic tag is determined according to the matched filtering result.

[0011] According to another aspect of the present invention, there is provided a decoding device for a passive electronic tag, the device comprising:

[0012] A signaling receiving module, used to receive downlink signaling sent by the reader and determine the encoding method of the downlink signaling;

[0013] A legality determination module, used to input the downlink signaling into a waveform sequence detection unit according to the encoding method to determine a signal legality determination result;

[0014] A matched filtering module, configured to extract a target waveform sequence in the calibration symbol if the signal is determined to be legal according to the signal legality judgment result, and perform matched filtering on the downlink signaling based on the target waveform sequence;

[0015] The decoding result determination module is used to determine the decoding result of the passive electronic tag according to the matched filtering result if it is determined that the target decision time has arrived according to the output signal of the symbol synchronization unit.

[0016] According to another aspect of the present invention, there is provided an electronic device, the electronic device comprising:

[0017] At least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the decoding method of the passive electronic tag described in any embodiment of the present invention.

[0018] According to another aspect of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the passive electronic tag decoding method described in any embodiment of the present invention when executed.

[0019] According to another aspect of the present invention, a computer program product is provided, comprising a computer program, wherein when the computer program is executed by a processor, the method for decoding a passive electronic tag according to any one of the embodiments of the present invention is implemented.

[0020] The technical solution of the embodiment of the present invention is to receive the downlink signaling sent by the reader and determine the encoding method of the downlink signaling; according to the encoding method, input the downlink signaling into the waveform sequence detection unit to determine the signal legitimacy judgment result; if the signal is determined to be legal according to the signal legitimacy judgment result, extract the target waveform sequence in the calibration symbol, and perform matched filtering on the downlink signaling based on the target waveform sequence; if the target decision moment is determined to have arrived according to the output signal of the symbol synchronization unit, determine the decoding result of the passive electronic tag according to the matched filtering result. This technical solution solves the problem of poor anti-interference ability of passive electronic tag data decoding, and improves the decoding sensitivity of the passive electronic tag by determining the decoding result of the passive electronic tag according to the matched filtering result at the target decision moment.

[0021] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 is a flow chart of a decoding method for a passive electronic tag provided according to Embodiment 1 of the present invention;

[0024] Figure 2 is a flow chart of a decoding method for a passive electronic tag provided according to Embodiment 2 of the present invention;

[0025] Figure 3 is a schematic structural diagram of a decoding device for a passive electronic tag provided according to Embodiment 3 of the present invention;

[0026] Figure 4 The present invention is a schematic diagram of the structure of an electronic device for implementing the decoding method of a passive electronic tag according to an embodiment of the present invention. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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 should fall within the scope of protection of the present invention.

[0028] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices. The acquisition, storage, use, processing, etc. of data in the technical solution of this application comply with the relevant provisions of national laws and regulations.

[0029] Embodiment 1

[0030] Figure 1 A flowchart of a method for decoding a passive electronic tag is provided for the first embodiment of the present invention. This embodiment is applicable to radio frequency identification scenarios, especially the decoding of passive electronic tags. The method can be executed by a decoding device for a passive electronic tag, which can be implemented in the form of hardware and / or software, and can be configured in an electronic device. Figure 1 As shown, the method includes:

[0031] S110: Receive downlink signaling sent by a reader, and determine a coding method of the downlink signaling.

[0032] This scheme can be executed by a passive electronic tag, which can be a passive tag without a built-in power supply. Outside the reading range of the reader, the electronic tag is in a passive state. Within the reading range of the reader, the electronic tag extracts the power required for its operation from the radio frequency energy emitted by the reader. The passive electronic tag can also convert light energy into electrical energy required for operation through irradiation of a light source. For example, a solar film is provided on the surface of the passive electronic tag, and the energy conversion of "solar energy-electric energy" is completed under sunlight, so that the passive electronic tag can work with electrical energy. Passive electronic tags generally use reflection modulation to complete the transmission of electronic tag information to the reader. The reader can encode the downlink signaling according to a pre-set encoding method and send it to the passive electronic tag. Within the reading range of the reader, the passive electronic tag can receive the downlink signaling sent by the reader and obtain the encoding method of the downlink signaling. Among them, the encoding method of the downlink signaling can be one of non-return-to-zero encoding, Manchester encoding, Miller encoding, unipolar return-to-zero encoding or differential biphase encoding.

[0033] S120. According to the encoding method, input the downlink signaling into a waveform sequence detection unit to determine a signal legitimacy judgment result.

[0034] The passive electronic tag can perform waveform sequence detection on the downlink signaling according to the encoding method of the downlink signaling to determine whether the downlink signaling complies with the protocol design. Specifically, the waveform sequence detection unit can record the level length of the waveform sequence in the downlink signaling based on the counter and the edge detector, and determine whether the signal of the downlink signaling is legal according to the level length of the waveform sequence in the downlink signaling, thereby obtaining a signal legality judgment result.

[0035] S130: If the signal is determined to be legal according to the signal legality judgment result, a target waveform sequence in the calibration symbol is extracted, and matched filtering is performed on the downlink signaling based on the target waveform sequence.

[0036] It can be understood that the calibration mark in the downlink signaling is used to verify the integrity and correctness of the data segment to ensure that the data has not been tampered with or damaged during data transmission. If the signal of the downlink signaling is legal, the passive electronic tag can extract the waveform sequence of a specific interval in the calibration mark as the target waveform sequence, and perform matched filtering on the downlink signaling based on the target waveform sequence to obtain the matched filtering result.

[0037] S140: If it is determined that the target decision time has arrived according to the output signal of the symbol synchronization unit, a decoding result of the passive electronic tag is determined according to the matched filtering result.

[0038] It is easy to understand that in a digital communication system, since the clock generated by the receiver oscillator is independent of the clock generated by the transmitter oscillator, there may be differences in frequency and phase between the two. In order to recover the data signal from the received signal, the receiving end must periodically sample and judge the output signal of the receiving filter in the demodulator at the symbol rate. Therefore, a clock signal synchronized with the symbol rate of the received digital baseband signal must be configured at the receiving end to obtain an accurate sampling instant.

[0039] In this solution, the symbol synchronization unit is set in the passive electronic tag to output a clock signal synchronized with the symbol rate of the digital baseband signal of the downlink signal. The passive electronic tag can determine whether the target decision time has arrived based on the output signal of the symbol synchronization unit. If the target decision time has arrived, the passive electronic tag can determine the decoding result of the passive electronic tag based on the matched filtering result of the downlink signaling and the target waveform sequence.

[0040] The technical solution of the embodiment of the present invention is to receive the downlink signaling sent by the reader and determine the encoding method of the downlink signaling; according to the encoding method, input the downlink signaling into the waveform sequence detection unit to determine the signal legitimacy judgment result; if the signal is determined to be legal according to the signal legitimacy judgment result, extract the target waveform sequence in the calibration symbol, and perform matched filtering on the downlink signaling based on the target waveform sequence; if the target decision moment is determined to have arrived according to the output signal of the symbol synchronization unit, determine the decoding result of the passive electronic tag according to the matched filtering result. This technical solution solves the problem of poor anti-interference ability of passive electronic tag data decoding, and improves the decoding sensitivity of the passive electronic tag by determining the decoding result of the passive electronic tag according to the matched filtering result at the target decision moment.

[0041] Embodiment 2

[0042] Figure 2 This is a flowchart of a decoding method for a passive electronic tag provided in the second embodiment of the present invention. This embodiment is refined based on the above embodiment. Figure 2 As shown, the method includes:

[0043] S210, receiving downlink signaling sent by the reader, wherein the encoding method of the downlink signaling is Manchester encoding; the frame structure of the downlink signaling includes a delimiter, a calibration symbol and a data segment; the waveform sequence detection unit includes a clutter detection subunit, a delimiter detection subunit and a calibration symbol detection subunit.

[0044] In this solution, the encoding method of downlink signaling is Manchester encoding, and the frame structure of downlink signaling includes a delimiter, a calibration mark and a data segment. Among them, the delimiter can be a low-level sequence of a fixed length, such as 12.5us. The calibration mark can be a waveform sequence of a fixed length, and the waveform change order can be low level -> high level -> low level -> high level, and the duration of the low level and the high level can be the same, such as 11.1us. The data segment can be the valid data transmitted by the reader.

[0045] The waveform sequence detection unit may include a noise detection subunit, a delimiter detection subunit and a calibration detection subunit. The noise detection subunit is used to detect whether there is noise in the downlink signaling; the delimiter detection electronic unit is used to detect whether the delimiter in the downlink signaling complies with the protocol design; and the calibration detection subunit is used to detect whether the calibration in the downlink signaling complies with the protocol design.

[0046] S220, input the downlink signaling into the clutter detection subunit, the delimiter detection subunit and the calibrator detection subunit in sequence, and determine the signal legitimacy judgment result according to the detection results output by each subunit.

[0047] In a feasible solution, the clutter detection subunit is used to determine whether the level length between every two edges in the downlink signaling is within a preset length range;

[0048] The delimiter detection subunit is used to identify the delimiter and determine whether the level length matched by the delimiter is equal to a preset level length threshold;

[0049] The calibration mark detection subunit is used to identify the calibration mark and determine whether the waveform sequence matched by the calibration mark meets the preset level sequence condition.

[0050] The clutter detection subunit can use a counter and an edge detector to record the level length between each two edges, and determine whether the level length between each two edges is within a preset length range. If so, it is determined that the wave is normal, and if not, it is determined that the wave is clutter. If there is clutter in the downlink signaling, the passive electronic tag can filter the downlink signaling to remove the clutter.

[0051] The delimiter detection subunit can identify the delimiter according to the level characteristics of the downlink signaling, and determine whether the level length matched by the delimiter is equal to the preset level length threshold. If the level length corresponding to the delimiter is equal to the preset level length threshold, it is determined that the delimiter complies with the protocol design; if the level length corresponding to the delimiter is not equal to the preset level length threshold, it is determined that the delimiter does not comply with the protocol design.

[0052] The calibration mark detection subunit can identify the calibration mark according to the level characteristics of the downlink signaling, and judge whether the waveform sequence matched by the calibration mark meets the preset level sequence conditions, such as judging whether the waveform sequence matched by the calibration mark is a low-high alternating level sequence, whether the level lengths of the low level and the high level are equal, whether the level lengths of the low level and the high level are equal to the preset level length threshold, etc. If the waveform sequence matched by the calibration mark meets the preset level sequence conditions, it is determined that the calibration mark meets the protocol design; if the waveform sequence matched by the calibration mark does not meet the preset level sequence conditions, it is determined that the calibration mark does not meet the protocol design.

[0053] On the basis of the above scheme, the signal legitimacy judgment result is determined according to the detection result output by each subunit, including:

[0054] If the level length between every two edges in the downlink signaling is within the preset length range, the level length matched by the delimiter is equal to the preset level length threshold, and the waveform sequence matched by the calibrator meets the preset level sequence condition, the signal is determined to be legal; otherwise, the signal is illegal.

[0055] It can be understood that if the level length between every two edges in the downlink signaling is within the preset length range, the level length matched by the delimiter is equal to the preset level length threshold, and whether the waveform sequence matched by the calibration symbol meets the preset level sequence condition, then the downlink signaling signal is determined to be legal, otherwise the downlink signaling signal is determined to be illegal.

[0056] S230: If the signal is determined to be legal according to the signal legality judgment result, a target waveform sequence in the calibration symbol is extracted, and matched filtering is performed on the downlink signaling based on the target waveform sequence.

[0057] On the basis of the above scheme, the target waveform sequence includes a first waveform sequence and a second waveform sequence; the first waveform sequence is a waveform sequence associated with symbol 0, and the second waveform sequence is a waveform sequence associated with symbol 1;

[0058] The performing matched filtering on the downlink signaling based on the target waveform sequence includes:

[0059] Using the first waveform sequence as a characteristic coefficient of a first matched filter, performing matched filtering on the downlink signaling to obtain a first matched filtering result;

[0060] The second waveform sequence is used as a characteristic coefficient of a second matched filter, and matched filtering is performed on the downlink signaling to obtain a second matched filtering result.

[0061] It can be understood that the calibration symbol includes a high level sequence and a low level sequence, and the high level and the low level can be represented by symbols 1 and 0 respectively. The passive electronic tag can use the waveform sequence associated with symbol 0 as the first waveform sequence and the waveform sequence associated with symbol 1 as the second waveform sequence.

[0062] The passive electronic tag can use the first waveform sequence as the characteristic coefficient of the first matched filter to perform matched filtering on the downlink signaling to obtain a first matched filtering result, and at the same time use the second waveform sequence as the characteristic coefficient of the second matched filter to perform matched filtering on the downlink signaling to obtain a second matched filtering result.

[0063] S240: If it is determined that the target decision time has arrived according to the output signal of the symbol synchronization unit, a decoding result of the passive electronic tag is determined according to the matched filtering result.

[0064] In a feasible solution, the symbol synchronization unit is used to determine the symbol end position according to the encoding mode of the downlink signaling and the output peak value of the matched filter, and output a pulse signal with the symbol end position as the starting point;

[0065] Determining the decoding result of the passive electronic tag according to the matched filtering result includes:

[0066] The maximum value between the first matched filtering result and the second matched filtering result is used as the decoding result of the passive electronic tag.

[0067] It is easy to understand that the output peak of the matched filter is the maximum instantaneous signal-to-noise ratio generated by the matched filter at the output when white noise is added to the input signal. The symbol synchronization unit can determine the symbol end position according to the encoding method of the downlink signaling and the output peak of the matched filter, and output a pulse signal starting from the symbol end position.

[0068] The first matched filtering result can be used to characterize the similarity between the first waveform sequence and the downlink signaling.

[0069] The second matched filtering result can be used to characterize the similarity between the second waveform sequence and the downlink signaling. The matched filtering result with a higher similarity can be used as the decoding result of the passive electronic tag.

[0070] In a specific example, a simulation model of RFID communication is established based on Matlab, and the simulation model includes a downlink signal envelope extraction unit, a hysteresis comparison unit, a DBB (Digital Baseband) symbol synchronization unit, and a DBB symbol decoding unit. Among them, the downlink signal envelope extraction unit is used to extract the envelope of the downlink signaling, and the hysteresis comparison unit is used to simulate the waveform of the downlink signaling envelope under different field strengths, and the waveform of the downlink signaling envelope under different field strengths is digitally sampled, and the sampling results are input into DBB.

[0071] The DBB symbol synchronization unit is used to find the duration and count value of a symbol 1 (Tari) and the edge position in the downlink signaling according to the delimiter and calibration symbol in the downlink signaling. Symbol 1 in the calibration symbol can be used as a local sequence for convolution of correlation detection, that is, the target waveform sequence. According to the insertion rule of CP (Cyclic Prefix) in the downlink signaling frame and the mathematical equation relationship between each part of the downlink signaling and tari, the start and end positions of CP and symbols are calculated, and the best decision time for symbol correlation detection is found. The DBB symbol decoding unit is used to convolve the input downlink signaling with the waveform sequences associated with symbol 0 and symbol 1 respectively, and at the calculated best decision time, the numerical values ​​of the two-way correlation convolution are judged, and the one with a higher degree of similarity is considered to be the decision value of the current symbol.

[0072] The technical solution of the embodiment of the present invention is to receive the downlink signaling sent by the reader and determine the encoding method of the downlink signaling; according to the encoding method, input the downlink signaling into the waveform sequence detection unit to determine the signal legitimacy judgment result; if the signal is determined to be legal according to the signal legitimacy judgment result, extract the target waveform sequence in the calibration symbol, and perform matched filtering on the downlink signaling based on the target waveform sequence; if the target decision moment is determined to have arrived according to the output signal of the symbol synchronization unit, determine the decoding result of the passive electronic tag according to the matched filtering result. This technical solution solves the problem of poor anti-interference ability of passive electronic tag data decoding, and improves the decoding sensitivity of the passive electronic tag by determining the decoding result of the passive electronic tag according to the matched filtering result at the target decision moment.

[0073] Embodiment 3

[0074] Figure 3 This is a schematic diagram of the structure of a decoding device for a passive electronic tag provided in the third embodiment of the present invention. Figure 3 As shown, the device comprises:

[0075] The signaling receiving module 310 is used to receive the downlink signaling sent by the reader and determine the encoding method of the downlink signaling;

[0076] A legality determination module 320, configured to input the downlink signaling into a waveform sequence detection unit according to the coding mode to determine a signal legality determination result;

[0077] A matched filtering module 330, configured to extract a target waveform sequence in the calibration symbol if the signal is determined to be legal according to the signal legality judgment result, and perform matched filtering on the downlink signaling based on the target waveform sequence;

[0078] The decoding result determination module 340 is used to determine the decoding result of the passive electronic tag according to the matched filtering result if it is determined that the target decision time has arrived according to the output signal of the symbol synchronization unit.

[0079] In this solution, optionally, the encoding method of the downlink signaling is Manchester encoding; the frame structure of the downlink signaling includes a delimiter, a calibrator and a data segment; the waveform sequence detection unit includes a clutter detection subunit, a delimiter detection subunit and a calibrator detection subunit;

[0080] The legal determination module 320 is specifically used for:

[0081] The downlink signaling is sequentially input into the clutter detection subunit, the delimiter detection subunit and the calibration detection subunit, and the signal legitimacy judgment result is determined according to the detection results output by each subunit.

[0082] On the basis of the above scheme, the clutter detection subunit is used to determine whether the level length between every two edges in the downlink signaling is within a preset length range;

[0083] The delimiter detection subunit is used to identify the delimiter and determine whether the level length matched by the delimiter is equal to a preset level length threshold;

[0084] The calibration mark detection subunit is used to identify the calibration mark and determine whether the waveform sequence matched by the calibration mark meets the preset level sequence condition.

[0085] In a feasible solution, the legal determination module 320 is specifically used to:

[0086] If the level length between every two edges in the downlink signaling is within the preset length range, the level length matched by the delimiter is equal to the preset level length threshold, and the waveform sequence matched by the calibrator meets the preset level sequence condition, the signal is determined to be legal; otherwise, the signal is illegal.

[0087] In this embodiment, the target waveform sequence includes a first waveform sequence and a second waveform sequence; the first waveform sequence is a waveform sequence associated with symbol 0, and the second waveform sequence is a waveform sequence associated with symbol 1; the matched filtering module 330 is specifically used for:

[0088] Using the first waveform sequence as a characteristic coefficient of a first matched filter, performing matched filtering on the downlink signaling to obtain a first matched filtering result;

[0089] The second waveform sequence is used as a characteristic coefficient of a second matched filter, and matched filtering is performed on the downlink signaling to obtain a second matched filtering result.

[0090] On the basis of the above scheme, the symbol synchronization unit is used to determine the symbol end position according to the encoding mode of the downlink signaling and the output peak value of the matched filter, and output a pulse signal with the symbol end position as the starting point;

[0091] The decoding result determination module 340 is specifically used to:

[0092] The maximum value between the first matched filtering result and the second matched filtering result is used as the decoding result of the passive electronic tag.

[0093] The passive electronic tag decoding device provided in the embodiment of the present invention can execute the passive electronic tag decoding method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0094] Embodiment 4

[0095] Figure 4A schematic diagram of an electronic device 410 that can be used to implement an embodiment of the present invention is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device may also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0096] like Figure 4 As shown, the electronic device 410 includes at least one processor 411, and a memory connected to the at least one processor 411 in communication, such as a read-only memory (ROM) 412, a random access memory (RAM) 413, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 411 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 412 or the computer program loaded from the storage unit 418 to the random access memory (RAM) 413. In the RAM 413, various programs and data required for the operation of the electronic device 410 can also be stored. The processor 411, the ROM 412, and the RAM 413 are connected to each other via a bus 414. An input / output (I / O) interface 415 is also connected to the bus 414.

[0097] Multiple components in the electronic device 410 are connected to the I / O interface 415, including: an input unit 416, such as a keyboard, a mouse, etc.; an output unit 417, such as various types of displays, speakers, etc.; a storage unit 418, such as a disk, an optical disk, etc.; and a communication unit 419, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 419 allows the electronic device 410 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0098] The processor 411 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the processor 411 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, digital signal processors (DSPs), and any appropriate processors, controllers, microcontrollers, etc. The processor 411 executes the various methods and processes described above, such as a decoding method for a passive electronic tag.

[0099] In some embodiments, the decoding method of the passive electronic tag can be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 418. In some embodiments, part or all of the computer program can be loaded and / or installed on the electronic device 410 via the ROM 412 and / or the communication unit 419. When the computer program is loaded into the RAM 413 and executed by the processor 411, one or more steps of the decoding method of the passive electronic tag described above can be performed. Alternatively, in other embodiments, the processor 411 can be configured to execute the decoding method of the passive electronic tag in any other appropriate manner (for example, by means of firmware).

[0100] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0101] The computer program for implementing the method of the present invention can be written in any combination of one or more programming languages. These computer programs can be provided to a processor of a general-purpose computer, a special-purpose computer or other programmable passive electronic tag decoding device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program can be executed completely on the machine, partially on the machine, as an independent software package, partially on the machine and partially on a remote machine, or completely on a remote machine or server.

[0102] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in combination with an instruction execution system, device or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0103] To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0104] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0105] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0106] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0107] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for decoding a passive electronic tag, characterized in that: The method comprises: Receive downlink signaling sent by the reader, and determine the encoding method of the downlink signaling; According to the encoding method, the downlink signaling is input into a waveform sequence detection unit to determine a signal legitimacy judgment result; If the signal is determined to be legal according to the signal legality judgment result, extracting the target waveform sequence in the calibration symbol, and performing matched filtering on the downlink signaling based on the target waveform sequence; If it is determined that the target decision time has arrived according to the output signal of the symbol synchronization unit, the decoding result of the passive electronic tag is determined according to the matched filtering result.

2. The method according to claim 1, characterized in that The encoding mode of the downlink signaling is Manchester encoding; the frame structure of the downlink signaling includes a delimiter, a calibrator and a data segment; the waveform sequence detection unit includes a clutter detection subunit, a delimiter detection subunit and a calibrator detection subunit; The step of inputting the downlink signaling into a waveform sequence detection unit according to the encoding mode to determine a signal legitimacy judgment result includes: The downlink signaling is sequentially input into the clutter detection subunit, the delimiter detection subunit and the calibration detection subunit, and the signal legitimacy judgment result is determined according to the detection results output by each subunit.

3. The method according to claim 2, characterized in that The clutter detection subunit is used to determine whether the level length between every two edges in the downlink signaling is within a preset length range; The delimiter detection subunit is used to identify the delimiter and determine whether the level length matched by the delimiter is equal to a preset level length threshold; The calibration mark detection subunit is used to identify the calibration mark and determine whether the waveform sequence matched by the calibration mark meets the preset level sequence condition.

4. The method according to claim 3, characterized in that Determining the signal legitimacy judgment result according to the detection results output by each subunit includes: If the level length between every two edges in the downlink signaling is within the preset length range, the level length matched by the delimiter is equal to the preset level length threshold, and the waveform sequence matched by the calibrator meets the preset level sequence condition, the signal is determined to be legal; otherwise, the signal is illegal.

5. The method according to claim 4, characterized in that The target waveform sequence includes a first waveform sequence and a second waveform sequence; the first waveform sequence is a waveform sequence associated with symbol 0, and the second waveform sequence is a waveform sequence associated with symbol 1; The performing matched filtering on the downlink signaling based on the target waveform sequence includes: Using the first waveform sequence as a characteristic coefficient of a first matched filter, performing matched filtering on the downlink signaling, and obtaining a first matched filtering result; The second waveform sequence is used as a characteristic coefficient of a second matched filter, and matched filtering is performed on the downlink signaling to obtain a second matched filtering result.

6. The method according to claim 5, characterized in that The symbol synchronization unit is used to determine the symbol end position according to the encoding mode of the downlink signaling and the output peak value of the matched filter, and output a pulse signal with the symbol end position as the starting point; Determining the decoding result of the passive electronic tag according to the matched filtering result includes: The maximum value between the first matched filtering result and the second matched filtering result is used as the decoding result of the passive electronic tag.

7. A decoding device for a passive electronic tag, characterized in that: The device comprises: A signaling receiving module, used to receive downlink signaling sent by the reader and determine the encoding method of the downlink signaling; A legality determination module, used to input the downlink signaling into a waveform sequence detection unit according to the encoding method to determine a signal legality determination result; A matched filtering module, configured to extract a target waveform sequence in the calibration symbol if the signal is determined to be legal according to the signal legality judgment result, and perform matched filtering on the downlink signaling based on the target waveform sequence; The decoding result determination module is used to determine the decoding result of the passive electronic tag according to the matched filtering result if it is determined that the target decision time has arrived according to the output signal of the symbol synchronization unit.

8. An electronic device, characterized in that: The electronic device comprises: At least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the decoding method of the passive electronic tag according to any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the decoding method of the passive electronic tag according to any one of claims 1 to 6 when executed.

10. A computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the computer program implements the decoding method of the passive electronic tag according to any one of claims 1 to 6.

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