WO2022199556A1 - 一种数据发送方法、信号处理方法及装置 - Google Patents

一种数据发送方法、信号处理方法及装置 Download PDF

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Publication number
WO2022199556A1
WO2022199556A1 PCT/CN2022/082130 CN2022082130W WO2022199556A1 WO 2022199556 A1 WO2022199556 A1 WO 2022199556A1 CN 2022082130 W CN2022082130 W CN 2022082130W WO 2022199556 A1 WO2022199556 A1 WO 2022199556A1
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Prior art keywords
signal
source data
segment
unit
similarity
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PCT/CN2022/082130
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English (en)
French (fr)
Inventor
唐瑜键
吴毅凌
陈俊
汪孙节
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华为技术有限公司
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Publication of WO2022199556A1 publication Critical patent/WO2022199556A1/zh

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
    • G06K7/10316—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers
    • G06K7/10356—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers using a plurality of antennas, e.g. configurations including means to resolve interference between the plurality of antennas

Definitions

  • the present application relates to the field of communication technologies, and in particular, designs a data transmission method, a signal processing method, and an apparatus.
  • Radio Frequency Identification (RFID) technology is a non-contact automatic identification technology.
  • An RFID tag can modulate a pre-stored source data sequence onto a carrier signal, and send a wireless signal to an RFID tag reader (Reader).
  • the source data sequence may include one or more source data 0 and/or source data 1, and the wireless signal is an analog signal.
  • the RFID tag reader can receive the wireless signal sent by the RFID tag, and determine the source data sequence from the wireless signal through steps such as envelope detection, filtering, and analog-to-digital conversion, so as to obtain the information sent by the RFID tag. In this way, wireless communication between the RFID tag reader and the RFID tag is realized.
  • the RFID tag reader can also send other source data sequences to the RFID tag through wireless signals, and the RFID tag can also receive data sent by the RFID tag reader according to the wireless signal.
  • the RFID tag reader (or RFID tag) can first encode the source data sequence into an intermediate signal, and then modulate the encoded intermediate signal onto a carrier signal for transmission.
  • the RFID tag (or the RFID tag reader) can first convert the wireless signal into a digital signal, and then decode the digital signal to determine the source data sequence.
  • source data 0 and source data 1 are mostly encoded as intermediate signals with different durations. Then, during decoding, the intermediate signal can be divided into multiple signal segments according to the rising edge or the falling edge, and then the source data corresponding to the signal segment is determined according to the duration of each signal segment.
  • SIR Signal-to-interference power ratio
  • the embodiments of the present application provide a data sending method, a signal processing method, and an apparatus, which aim to reduce the influence of external interference on wireless signal transmission and improve the anti-interference ability by adjusting the encoding rules and decoding rules.
  • an embodiment of the present application provides a data sending method, which can be applied to a first device that sends a signal to a second device, including: the first device acquires a sequence of source data to be sent, the source data
  • the sequence may include at least one source data 0 and/or at least one source data 1 .
  • the first device may encode the source data to obtain a target signal, and send the target signal to the second device.
  • the first device may encode source data 0 into a first unit signal, encode source data 1 into a unit signal, and the duration of the first unit signal is the same as the duration of the second unit signal. equal.
  • the second device when the second device decodes the target device, since the duration of the first unit signal is equal to the duration of the second unit signal, the second device can divide the signal segment according to the duration of the first unit signal (or the second unit signal). , it is not necessary to divide the signal segment according to the rising edge, thus reducing the influence of false rising edge and loss of rising edge on the decoding result. In this way, by adjusting the coding rules and decoding rules, the influence of external interference on wireless signal transmission is reduced, and the anti-interference capability is improved.
  • the process of encoding the source data sequence by the first device may include two steps of precoding and secondary coding, where secondary coding is also called line code coding.
  • the first device may precode the source data 0 into an intermediate data sequence including m intermediate data 0 and n intermediate data 1, and precode the source data 1 into an intermediate data sequence including m intermediate data sequences of n intermediate data 0 and n intermediate data 1, and the intermediate data sequence obtained by precoding of source data 1 is different from the intermediate data sequence obtained by precoding of source data 0.
  • m and n are positive integers greater than or equal to 1.
  • the number of intermediate data 0 is equal and the number of intermediate data 1 is equal.
  • the waveforms of the obtained target signals are different, but the lengths are the same. In this way, on the basis of ensuring the difference between the first unit signal and the second unit signal, the durations of the first unit signal and the second unit signal are the same.
  • the secondary encoding may be pulse width encoding (Pulse Interval Encoding, PIE).
  • the first device includes a radio frequency identification RFID tag reader
  • the second device includes an RFID tag
  • the first device is a base station including the RFID tag reader
  • the second device is a terminal device including the RFID tag
  • the source data sequence is used to start the second device.
  • an embodiment of the present application provides a signal processing method, which can be applied to a second device that receives a signal from a first device, including: the second device acquires a target signal from the first device.
  • the target signal is a signal obtained after the first device encodes the source data sequence code, and the source data sequence includes at least one source data 0, and/or at least one source data 1.
  • the source data 0 is encoded as the first unit signal
  • the source data 1 is encoded as the second unit signal
  • the duration of the first unit signal is the same as the duration of the second unit signal, both being the first time interval.
  • the second device may divide the target signal into at least one signal segment according to the first time interval, and the duration of each signal segment is equal to or similar to the first time interval.
  • the second device may decode each signal segment in the at least one signal segment, so as to determine the source data corresponding to each signal segment, and obtain a first sequence of source data.
  • the second device can divide the signal segment according to the first time interval, and does not need to divide the signal segment according to the rising edge, thereby reducing false rising edges. and the effect of missing rising edge on the decoding result.
  • the second device may adjust the coding rules and decoding rules, the influence of external interference on wireless signal transmission is reduced, and the anti-interference capability is improved.
  • the second device may determine the detection segment according to the time interval, and divide the signal segment according to the model of the detection segment.
  • the foregoing at least one signal segment includes the first signal segment as an example for description.
  • the second device may first determine the first time window and the second time window according to the first time interval, and determine the first detection segment corresponding to the first time window from the target signal and a second detection segment corresponding to the second time window.
  • the interval between the start point of the first time window and the start point of the second time window is a preset time interval.
  • the target signal can be divided into the first signal segment according to the waveform of the first detection segment and the waveform of the second detection segment.
  • the second device may divide the first signal segment according to the waveform of the first detection segment and whether the waveform of the second detection segment includes a rising edge.
  • the second device may detect the difference between the first rising edge and the second rising edge.
  • the target signal in between is determined to be the first signal segment; if the waveform of the first detection segment includes the first rising edge, and the waveform of the second detection segment does not include the second rising edge, the second device can compare the first rising edge with the second rising edge.
  • the target signal between the midpoints of the waveform of the detection segment is determined to be the first signal segment; if the waveform of the first detection segment does not include the first rising edge, and the waveform of the second detection segment includes the second rising edge, the second device can Determine the target signal between the midpoint of the waveform of the first detection segment and the second rising edge as the first signal segment; if the waveform of the first detection segment does not include the first rising edge, and the waveform of the second detection segment does not include On the second rising edge, the second device determines the target signal between the midpoint of the waveform of the first detection segment and the midpoint of the waveform of the second detection segment as the first signal segment.
  • each division of the signal segment is based on a fixed time interval, which can eliminate the accumulated error generated by each division of the signal segment.
  • the duration of the first time window is shorter than the first time interval, and the duration of the second time window is also shorter than the first time interval. In this way, the influence of false rising edges and rising edges on the first detection segment and the second detection segment can be reduced as much as possible, thereby improving the anti-interference capability of the second device.
  • the similarity between the signal segment and the first unit signal and the second unit signal may be compared one by one.
  • the second device may compare the degree of similarity between the first signal segment and the first unit signal to obtain the first degree of similarity.
  • the second device may also compare the degree of similarity between the second radio frequency signal segment and the second unit signal to obtain the second degree of similarity.
  • the second device may determine the source data corresponding to the first signal segment according to the first similarity and/or the second similarity.
  • the degree of overlap can still determine whether the signal segment is generated by the first unit signal after interference or the second unit signal. produced after interference. In this way, the accuracy of the decoded source data can be ensured.
  • the second device may compare the magnitudes of the first similarity and the second similarity, and if the first similarity is greater than the second similarity, it indicates that the waveform of the first signal segment is the waveform of the first unit signal. If it is closer, the client can determine that the source data corresponding to the first signal segment is source data 0; if the first similarity is less than the second similarity, it means that the waveform of the first signal segment is more similar to the waveform of the second unit signal. Approaching, the client can determine that the source data corresponding to the first signal segment is the source data 1 .
  • the target signal is modulated onto a carrier signal and sent to the second device.
  • the second device can receive the first radio frequency signal sent by the first device through devices such as an antenna, and then filter the first radio frequency signal to filter out high-frequency components and interference signals in the first radio frequency signal to obtain the second radio frequency Signal.
  • the second device may convert the second radio frequency signal into a digital signal to obtain the target signal.
  • the second device may use two filters to filter the first radio frequency preference. Specifically, the second device can first filter the first radio frequency signal through the first low-pass filter to obtain the intermediate signal; and then filter the intermediate signal through the second low-pass filter to obtain the second radio frequency signal. Wherein, the cut-off frequency of the first low-pass filter is higher than the cut-off frequency of the second low-pass filter.
  • the cutoff frequency of the second low-pass filter is the reciprocal of the shortest duration of the low level or the high level in the target signal.
  • the first device includes an RFID tag reader and the second device includes an RFID tag.
  • the first device is a base station including the RFID tag reader
  • the second device is a terminal device including an RFID tag.
  • the second device when the second device is a terminal device including an RFID, the second device may also compare the first source data sequence with pre-stored target source data after obtaining the first source data sequence Whether the sequence matches, if so, control the terminal device to enter the working state. In this way, the electric energy stored in the second device can be saved, thereby extending the working time of the second device.
  • an embodiment of the present application provides a data sending apparatus, the apparatus is located in the aforementioned first device, and includes: an obtaining unit configured to obtain a source data sequence to be sent, where the source data sequence includes at least one signal source. source data 0, and/or, at least one source data 1; a processing unit, configured to encode the source data sequence to obtain a target signal, wherein the target signal includes at least one first unit signal, and/ Or, at least one second unit signal, the first unit signal is obtained by encoding the source data 0, the second unit signal is obtained by encoding the source data 1, and the first unit signal is obtained by encoding the source data 1.
  • the duration of a unit signal and the second unit signal are the same; the sending unit is used for sending the target signal to the second device.
  • the processing unit is configured to pre-encode the source data sequence to obtain an intermediate data sequence, wherein each source data in the source data sequence is pre-coded as m intermediate data 0 and n intermediate data 1, where m and n are both integers greater than or equal to 1; perform secondary encoding on the intermediate data sequence to obtain a target signal.
  • the processing unit is configured to perform pulse width encoding (PIE) on the intermediate data sequence to obtain the target signal.
  • PIE pulse width encoding
  • the first device includes a radio frequency identification RFID tag reader and the second device includes an RFID tag.
  • the first device is a base station including the RFID tag reader
  • the second device is a terminal device including the RFID tag
  • the source data sequence is used to start the second device.
  • an embodiment of the present application provides a signal processing apparatus, the apparatus is located in a second device, and includes: an acquisition unit configured to acquire a target signal from the first device; the target signal is a data sequence of a signal source The encoded signal, the source data sequence includes at least one source data 0, and/or at least one source data 1, the target signal includes at least one first unit signal, and/or, at least one second unit signal, the first unit signal is obtained by encoding the source data 0, the second unit signal is obtained by encoding the source data 1, the duration of the first unit signal and the The duration of the second unit signal is a first time interval; the processing unit is configured to divide the target signal into at least one signal segment according to the first time interval; for each signal in the at least one signal segment The segment is decoded to obtain the first source data sequence.
  • the processing unit is configured to determine a first detection segment corresponding to the first time window and a second detection segment corresponding to the second time window from the target signal according to the first time interval segment, the interval between the starting point of the first time window and the starting point of the second time window is the preset time interval; according to the waveform of the first detection segment and the waveform of the second detection segment A waveform divides the target signal into the first signal segments.
  • the duration of the first time window detection segment is shorter than the first time interval, and the duration of the second time stamp is shorter than the first time interval.
  • the processing unit is configured to, in response to the waveform of the first detection segment including a first rising edge, and the waveform of the second detection segment including a second rising edge, convert the first The target signal between the rising edge and the second rising edge is determined as the first signal segment.
  • the processing unit is configured to, in response to the waveform of the first detection segment including a first rising edge, and the waveform of the second detection segment not including a second rising edge, process the first The target signal between a rising edge and the midpoint of the waveform of the second detection segment is determined as the first signal segment.
  • the processing unit is configured to, in response to the waveform of the first detection segment not including the first rising edge, and the waveform of the second detection segment not including the second rising edge, process the The target signal between the midpoint of the waveform of the first detection segment and the midpoint of the waveform of the second detection segment is determined as the first signal segment.
  • the at least one signal segment includes a first signal segment; the processing unit is configured to compare the degree of similarity between the first signal segment and the first unit signal to obtain a first degree of similarity, and or, comparing the degree of similarity between the first signal segment and the second unit signal to obtain a second degree of similarity; and determining the corresponding degree of the first signal segment according to the first degree of similarity and/or the second degree of similarity the first source of data.
  • the processing unit is configured to compare the magnitudes of the first similarity and the second similarity; in response to the first similarity being greater than the second similarity, determine the The source data corresponding to the first signal segment is source data 0; in response to the first similarity being less than the second similarity, the source data corresponding to the first signal segment is determined to be source data 1.
  • the processing unit includes a first XOR gate, a second XOR gate, a first adder, a second adder, and a comparator; the first XOR gate is used to compare all the degree of similarity between the first signal segment and the first unit signal; the second XOR gate for comparing the degree of similarity between the first signal segment and the second unit signal; the first adder , used to record the first similarity; the second adder, used to record the second similarity; the comparator, used to compare the first similarity with the second similarity size.
  • the receiving unit is configured to receive a first radio frequency signal sent by the first device; filter the first radio frequency signal to obtain a second radio frequency signal; analog-to-digital conversion to obtain the target signal.
  • the processing unit is configured to filter the first radio frequency signal through a first low-pass filter to obtain an intermediate signal; filter the intermediate signal through a second low-pass filter, A second radio frequency signal is obtained; wherein the cut-off frequency of the first low-pass filter is higher than the cut-off frequency of the second low-pass filter.
  • the cutoff frequency of the second low-pass filter is the reciprocal of the shortest duration of the low level or the high level in the target signal.
  • the first device includes an RFID tag reader and the second device includes an RFID tag.
  • the first device is a base station including the RFID tag reader
  • the second device is a terminal device including an RFID tag.
  • the processing unit is further configured to compare whether the first information source data sequence matches the pre-stored target information source data sequence, and if they match, control the terminal device to enter a working state.
  • an embodiment of the present application provides a device, the device includes: at least one processor, the at least one processor is coupled with at least one memory; the at least one processor is configured to execute the at least one The computer program or instructions stored in the memory enable the device to execute the data sending method described in the first aspect.
  • the device is a base station that includes an RFID tag reader.
  • an embodiment of the present application provides a device, the device includes: at least one processor, the at least one processor is coupled with at least one memory; the at least one processor is configured to execute the at least one The computer program or instructions stored in the memory cause the apparatus to perform the signal processing method described in the aforementioned second aspect.
  • the device is a terminal device that includes an RFID tag.
  • an embodiment of the present application provides a computer-readable storage medium, including instructions, programs, or codes, when the instructions, programs, or codes are executed on a computer, the computer is made to perform as described in the foregoing first aspect. the data transmission method described above, or cause the computer to execute the signal processing method described in the second aspect.
  • FIG. 1 is a schematic structural diagram of an RFID system provided by an embodiment of the present application.
  • FIG. 2 is a schematic diagram of a signal waveform provided by an embodiment of the present application.
  • FIG. 3 is a signaling interaction diagram of a data sending method provided by an embodiment of the present application.
  • FIG. 4 is a schematic diagram of another signal waveform provided by an embodiment of the present application.
  • FIG. 5 is a schematic diagram of another signal waveform provided by an embodiment of the present application.
  • Fig. 6 is a kind of simulation result diagram provided by the embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of a data sending apparatus 700 according to an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of a signal processing apparatus 800 according to an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of a device 900 according to an embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of a device 1000 provided by an embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of a device 1100 provided by an embodiment of the present application.
  • FIG. 12 is a schematic structural diagram of a device 1200 provided by an embodiment of the present application.
  • the RFID system includes an RFID tag 110 and an RFID tag reader 120 .
  • the RFID tag reader 120 can encode the source data sequence to obtain a target signal, modulate the target signal to a carrier wave to obtain a wireless signal, and send the wireless signal to the RFID tag 110 Signal.
  • the RFID tag 110 can receive the wireless signal sent by the RFID tag reader 120 through the antenna, and process the wireless signal through components such as an envelope detector, a low-frequency filter and an analog-to-digital converter, and convert the wireless signal into a digital signal format. target signal.
  • the RFID tag 110 can decode the target signal according to the decoding method corresponding to the encoding method of the RFID tag reader 120 , and finally determine the source data sequence sent by the RFID tag reader 120 .
  • the RFID tag 110 can also transmit other data to the RFID tag reader 120 through a similar method.
  • the specific process is similar to the foregoing process, and is not repeated here.
  • the duration of the signal obtained after the source data 0 is encoded may be different from the duration of the signal obtained after the source data 1 is encoded.
  • the target signal when decoding the target signal, can be divided into one or more signal segments according to the rising edge (Rising Edge) or the falling edge (Falling Edge) in the target signal, and then according to the duration of each signal segment. Determine the source data corresponding to the signal segment.
  • the rising edge is the time when the target signal changes from low level to high level
  • the falling edge is the time when the target signal changes from high level to low level.
  • the following description takes the encoding method as pulse width encoding as an example.
  • the source data 0 in the source data sequence is encoded as a target signal with a high level of one clock unit and a low level of one clock unit.
  • the clock unit refers to the time when the clock signal of the device encoding the source data sequence (such as an RFID tag or an RFID tag reader) is flipped once (or multiple times), or the time for one cycle of the clock signal.
  • its specific waveform may be as shown in the waveform 210 in FIG. 2 .
  • the waveform 210 includes a high-level signal 211 with a duration of one clock unit and a low-level signal 212 with a duration of one clock unit, and ends with a rising edge 213 .
  • the duration of the obtained target signal is two clock units.
  • the ordinate of each coordinate system in FIG. 2 and subsequent waveform diagrams represents the magnitude of the signal level
  • the horizontal axis is the time axis
  • the duration between any two adjacent thin dotted lines is one clock unit .
  • the source data 1 in the source data sequence is encoded as a target signal with a high level of three clock units and a low level of one clock unit.
  • its specific waveform may be as shown in the waveform 220 in FIG. 2 .
  • the waveform 220 includes a high-level signal 221 with a duration of 3 clock units and a low-level signal 222 with a duration of one clock unit, and ends with a rising edge 223 . It can be seen that after the pulse width coding is performed on the source data 1, the duration of the obtained target signal is four clock units.
  • the RFID tag 110 When decoding the target signal, the RFID tag 110 (or the RFID tag reader 120 ) can detect the rising edge of the target signal, divide the signal between the two rising edges into a signal segment, and then determine the duration of the signal segment The source data corresponding to this signal segment. For example, RFID tag 110 (or RFID tag reader 120) may compare the magnitude of the duration of the signal segment to the duration of three clock units. If the duration of the signal segment is greater than the duration of three clock units, the source data corresponding to the signal segment is 1; if the duration of the signal segment is less than the duration of three clock units, the source data corresponding to the signal segment is 0.
  • the waveform 230 in FIG. 2 is the waveform of the target signal obtained after encoding the source data sequence “10”, including a high-level signal 231 with a duration of 3 clock units, a low-level signal 232 with a duration of 1 clock unit, and a duration of A high-level signal 234 of 1 clock unit and a low-level signal 235 of a duration of 1 clock unit.
  • the starting position of the high-level signal 231 is the rising edge.
  • the RFID tag 110 When decoding the target signal, the RFID tag 110 (or the RFID tag reader 120 ) can divide the target signal into 2 signal segments according to the rising edge 237 , the rising edge 233 and the rising edge 236 , and the waveform of the first signal segment includes The high-level signal 231 and the low-level signal 232 have a duration of 4 clock units; the waveform of the second signal segment includes a high-level signal 234 and a low-level signal 235, and the duration is 2 clock units.
  • the RFID tag 110 (or the RFID tag reader 120) can determine that the first source data in the source data sequence is 1; When the duration is less than the duration of three clock units, the RFID tag 110 (or the RFID tag reader 120 ) can determine that the second source data in the source data sequence is 0.
  • spurious rising edge 242 appears in waveform 240 in FIG. 2, and a rising edge 253 is missing from waveform 250.
  • the RFID tag when decoding the target signal corresponding to the waveform 240, the RFID tag (or the RFID tag reader 120) can divide the target signal into 3 signal segments according to the rising edge 249, the rising edge 242, the rising edge 245 and the rising edge 248.
  • the first The waveform of the first signal segment includes a high-level signal 241; the waveform of the second signal segment includes a high-level signal 243 and a low-level signal 244; the waveform of the third signal segment includes a high-level signal 246 and a low-level signal 247.
  • the source data sequence obtained by decoding is "000", which is different from the source data sequence "10".
  • the RFID tag When decoding the target signal corresponding to the waveform 250 , the RFID tag (or the RFID tag reader 120 ) can divide the target signal into one signal segment according to the rising edge 251 and the rising edge 255 , and the waveform of the signal segment includes the high-level signal 252 and the low-level signal 254, the decoded source data sequence is "1", which is different from the source data sequence "10".
  • the RFID tag or the RFID tag reader 120 may not be able to accurately divide the signal segment, which affects the decoding result and has poor anti-interference ability.
  • the embodiments of the present application provide a data transmission method and a signal decoding method.
  • the method ensures that the length of the target signal obtained by encoding the source data 0 and the source data 1 is the same, so that the decoding does not need to be based on the rising
  • the signal segment is divided by the edge to reduce the influence of false rising edges and missing rising edges on the decoding result. In this way, by adjusting the coding rules and decoding rules, the influence of external interference on wireless signal transmission is reduced, and the anti-interference capability is improved.
  • the RFID tag 110 may be an active RFID tag or a passive RFID tag.
  • an active RFID tag refers to an RFID tag with a power supply
  • a passive RFID tag refers to an RFID tag without a power supply.
  • the RFID tag reader 120 can be an active RFID tag reader; when the RFID tag 110 is a passive RFID tag, the RFID tag reader can be a passive RFID tag reader. device.
  • the RFID tag reader 120 further includes an energy transmitting device for transmitting electrical energy to the RFID tag 110, and the RFID tag 110 further includes an energy receiving device for receiving the transmission from the RFID tag reader 120. of electrical energy.
  • the RFID tag 110 and the RFID tag reader 120 may belong to terminal devices.
  • Terminal equipment also known as user equipment (UE), mobile station (MS), mobile terminal (MT), terminal, etc.
  • UE user equipment
  • MS mobile station
  • MT mobile terminal
  • terminal equipment is a device that provides voice and/or data connectivity to users.
  • device or a chip provided in the device, for example, a handheld device with a wireless connection function, a vehicle-mounted device, etc.
  • terminal devices are: mobile phone, desktop computer, tablet computer, notebook computer, PDA, mobile internet device (MID), wearable device, virtual reality (VR) device, augmented reality (augmented reality, AR) equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, and smart grids wireless terminals, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, and 5G-residential gateway devices that support 5G access , 5G-RG) and so on.
  • MID mobile internet device
  • VR virtual reality
  • AR augmented reality
  • wireless terminals in industrial control wireless terminals in self-driving
  • wireless terminals in remote medical surgery and smart grids wireless terminals
  • wireless terminals in transportation safety wireless terminals in smart cities, wireless terminals in smart homes, and 5G-residential gateway devices that support 5G access , 5G-RG) and so on.
  • the RFID tag 110 belongs to the base station and the RFID tag reader 120 belongs to the terminal device.
  • the terminal device may be an Internet of Things terminal device.
  • the terminal device Before the terminal device receives the target source data sequence, the terminal device can control other functional modules except the RFID tag reader 120 to be in a sleep state. After the terminal device receives the target source data sequence sent by the base station through the RFID tag 110 through the RFID tag reading area 120, the terminal device can wake up the dormant functional module.
  • the terminal device can wake up the dormant functional module.
  • the methods provided in the embodiments of the present application can also be applied to other scenarios in which data is transmitted through radio frequency signals. It can be understood that any device that needs to send a source data sequence to other devices can execute the data sending method provided by the embodiment of the present application. Likewise, any device that needs to receive a source data sequence sent by another device can execute the signal processing method provided by the embodiment of the present application.
  • the RFID system is only a preferred application scenario of the present application, which does not mean that the methods provided in the embodiments of the present application can only be applied to the RFID system.
  • FIG. 3 is a data interaction diagram of a data sending method provided by an embodiment of the present application.
  • the data sending method provided by the embodiment of the present application includes the following steps:
  • S301 The first device acquires the source data sequence to be sent.
  • the first device Before sending the signal to the second device, the first device may first obtain the source data sequence to be sent.
  • the first device may be the RFID tag reader 120 in the embodiment shown in FIG. 1 , for example, it may be an active RFID tag reader or a passive RFID tag reader; the second device may be the RFID tag reader in the embodiment shown in FIG. 1 .
  • Tag 110 for example, may be an active RFID tag or a passive RFID tag.
  • the first device may also be an RFID tag 110
  • the second device may be an RFID tag reader 120 .
  • the source data sequence may include at least one source data 0 , and/or at least one source data 1 .
  • the source data sequence is the data that the first device actually wants to send to the second device, so that the second device performs corresponding operations according to the source data sequence.
  • the source data may be stored in the first device in the form of a program, or may be stored in the first device in the form of a hardware circuit, which is not limited in the embodiment of the present application.
  • the first device encodes the source data sequence to obtain a target signal.
  • the first device may encode the source data sequence to obtain the target signal.
  • the target signal may include a high-level signal of at least one clock unit and a low-level signal of at least one clock unit.
  • the clock unit may be the duration of one flip of the clock signal of the first device, or the duration of one or more cycles of the clock signal.
  • the first device and the second device may include a device for generating a clock signal, which may be, for example, an electronic component such as a crystal oscillator.
  • the frequency of the clock signal is 1.92 MHz (Million Hertz, MHz).
  • the first device may sequentially encode each source data in the source data sequence, and then encode the obtained signals in sequence according to the sequence of the source data in the source data sequence. Arrange to get the target signal.
  • a signal obtained after encoding source data 0 is called a first unit signal
  • a signal obtained after encoding source data 1 is called a second unit signal.
  • the obtained target signal includes at least one first unit signal and/or at least one second unit signal.
  • the main reason for the poor anti-interference ability of wireless signals in the prior art is that the signal durations obtained after encoding of source data 0 and source data 1 are not equal, so signal segments need to be divided by rising edges.
  • the duration of the first unit signal is equal to the duration of the second unit signal. In this way, during the decoding process, the signal segments can be divided according to the duration of the first unit signal (or the second unit signal), so as to avoid being affected by false rising edges or lost rising edges.
  • the first device may first perform precoding on the source data sequence to obtain the intermediate data sequence, and then perform secondary encoding on the intermediate data sequence to obtain the target signal.
  • the secondary encoding can also be called line code encoding, and the encoding method used can be the same as the traditional encoding method, such as PIE, Not Return to Zero (Not Return to Zero) code or Manchester code and other encoding methods.
  • the coding method used in precoding can encode the source data 1 into an intermediate data sequence with m intermediate data 0 and n intermediate data 1, and encode the source data 1 into an intermediate data sequence with m intermediate data 0 and n intermediate data 1.
  • m and n are positive integers greater than or equal to 1. That is to say, in the intermediate data sequence obtained after the precoding of the source data 1 and the source data 0, the number of the intermediate data 0 is equal and the number of the intermediate data 1 is equal.
  • the secondary coding mode is pulse width coding
  • the coding mode adopted for precoding can encode source data 1 as a sequence "10”, and encode source data 0 as a sequence "01".
  • the intermediate data sequence "01" can be obtained, and then after pulse width coding, the obtained first unit signal is shown as waveform 410 in Figure 4, which is composed of a high level of one clock unit.
  • the signal 411, the low-level signal 412 of one clock unit, the high-level signal 413 of three clock units, and the low-level signal 414 of one clock unit are composed in sequence.
  • the intermediate data sequence "10" can be obtained, and then after pulse width coding, the obtained second unit signal is shown in the waveform 420 in Figure 3, which consists of three clock units of high-level signals. 421 , a low-level signal 412 of one clock unit, a high-level signal 423 of one clock unit, and a low-level signal 424 of one clock unit are formed in sequence. It can be seen that the waveforms of the signals obtained after the precoding and secondary coding of the source data 1 and the source data 0 are different, but the lengths are the same. In this way, on the basis of ensuring the difference between the first unit signal and the second unit signal, the durations of the first unit signal and the second unit signal are the same.
  • encoding source data 1 as an intermediate data sequence "10” and encoding source data 0 as an intermediate data sequence "01" is only an implementation manner provided by the embodiments of the present application.
  • the first device may further perform precoding on the source data sequence by using a coding manner such as a walsh code or a gold code.
  • the first device may precode the source data in other ways, for example, encode source data 1 as "0101” and encode source data 0 as "1010".
  • S303 The first device sends the target signal to the second device.
  • the first device may send the target signal to the second device.
  • the first device may modulate the target signal onto a high-frequency carrier to obtain a first radio frequency signal, and then send the first radio frequency signal to the second device through an antenna.
  • the second device is a device including an RFID tag, and may be, for example, a terminal device including an RFID tag.
  • the second device is a low-power IoT terminal device.
  • the first device may be a base station including an RFID tag reader.
  • S304 The second device acquires the target signal from the first device.
  • the second device may receive the first radio frequency signal through the signal receiving device. After receiving the first radio frequency signal sent by the first device, the second device may process the first radio frequency signal to obtain the target signal from the first device. For example, the second device may receive the signal of the first device through an antenna, and process the first radio frequency signal through devices such as an envelope detector, a filter, an analog-to-digital converter, etc., to obtain the target signal.
  • the target signal is a digital signal, including at least one clock unit high level signal and at least one clock unit low level signal.
  • the second device may filter the first radio frequency signal through a second-stage low-pass filter.
  • the secondary low-pass filter includes a first low-pass filter and a second low-pass filter.
  • the cutoff frequency of the first low-pass filter corresponds to the carrier signal, and is used to filter the carrier signal with a higher frequency in the first radio frequency signal.
  • the cut-off frequency of the second low-pass filter is lower than the cut-off frequency of the first low-pass filter and higher than the highest frequency of the target signal, and is used to filter the interference in the first radio frequency signal whose frequency is lower than the carrier signal and higher than the target signal Signal.
  • the highest frequency of the target signal is the inverse of the duration of the shortest low-level signal, or the inverse of the duration of the shortest high-level signal in the target signal.
  • the cutoff frequency of the second low-pass filter may be the reciprocal of the shortest duration of the low-level signal or the high-level signal in the target signal.
  • the cutoff frequency of the second low-pass filter may be one half of the reciprocal of the duration of the shortest low level in the first unit signal (or the second unit signal).
  • the first radio frequency signal received by the second device may be different from the first radio frequency signal actually sent by the first device.
  • S305 The second device divides the target signal into at least one signal segment according to the first time interval.
  • the second device may divide the target signal into at least one signal segment according to the first time interval.
  • the first time interval is the length of the first unit signal (or the second unit signal), that is, the duration of the target signal obtained after the source data 0 (or the source data 1) is encoded.
  • each signal segment in the at least one signal segment matches the first unit signal or the second unit signal, and corresponds to source data 0 or source data 1.
  • each signal segment is decoded to obtain target data corresponding to each signal segment, thereby determining the source data sequence corresponding to the target signal.
  • the second device may divide the signal segment according to the length of the target signal, or may divide the signal segment according to the rising edge in the target signal. Two methods for the second device to determine the first signal segment from the target signal are described below by taking the aforementioned at least one signal segment including the first signal segment as an example.
  • the second device may determine the first signal segment from the target signal according to the first time interval and the length of the target signal.
  • the first time interval is the duration of the signal obtained after the encoding of the source data 0 (or the source data 1).
  • the technician can calculate the duration of the first unit signal (or the second unit signal) after determining the encoding mode to obtain the first time interval.
  • the first time interval can be recorded in the second device.
  • the second device may determine the first signal segment according to a rising edge in the target signal. For example, the second device may determine the first signal segment according to the waveform of the target signal within the time window.
  • the second device may first determine the first time window and the second time window according to the first time interval.
  • the time interval between the starting point of the first time window and the starting point of the second time window is the first time interval.
  • the first time interval is 1 ms
  • the lengths of the first time window and the second time window are smaller than the first time interval.
  • the lengths of the first time window and the second time window may be substantially larger than the first time interval, for example, may be one-tenth or twentieth of the first time interval. one.
  • start point of the first time window is earlier than the start point of the second time window, but in some other implementation manners, the start point of the second time window may also be earlier than the first time window The starting point of the window.
  • the embodiment of the present application does not limit the sequence relationship between the first time window and the second time window.
  • the second device may record the waveform of the target signal in the first time window as the first detection segment, and record the waveform of the target signal in the second time window as the second detection segment detection segment. Next, the second device may detect whether the first detection segment includes a rising edge, and detect whether the second detection segment includes a rising edge.
  • the second device can connect the target signal between the first rising edge and the second rising edge.
  • the part between the rising edges is divided into the first signal segment; if the first detection segment does not include the first rising edge, and the second detection segment includes the second rising edge, the second device can place the target signal in the middle of the first detection segment.
  • the part between the point and the second rising edge is divided into the first signal segment; if the first detection segment includes the first rising edge, and the second detection segment does not include the second rising edge, the second device can place the target signal in the first signal segment.
  • the part between a rising edge and the midpoint of the second detection segment is divided into the first signal segment; if the first detection segment does not include the first rising edge, and the second detection segment does not include the second rising edge, the second device
  • the portion of the target signal between the midpoint of the first detection segment and the midpoint of the second detection segment may be divided into first signal segments.
  • the midpoint of the first detection segment (or the second detection segment) refers to the signal of the target signal at the middle moment of the first time window (or the second time window).
  • the waveform of the target signal may be any one of the waveform 510 , the waveform 520 or the waveform 530 .
  • the second device can detect the first rising edge 511 in the first detection segment corresponding to the first time window 540 , and in the second detection segment corresponding to the second time window 550 .
  • the second rising edge 512 is detected, and the third rising edge 513 is detected in the third detection segment corresponding to the third time window 560 .
  • the second device may determine the target signal between the first rising edge 511 and the second rising edge 512 as the first signal segment, and the target signal between the second rising edge 512 and the third rising edge 513 as The second radio frequency signal segment.
  • the second device may detect the first rising edge 521 in the first detection segment corresponding to the first time window 540 , and detect the first rising edge 521 in the second detection segment corresponding to the second time window 550 .
  • the second rising edge is not detected, and the third rising edge 523 is detected in the third detection segment corresponding to the third time window 560 .
  • the second device may determine the target signal between the first rising edge 521 and the midpoint 522 of the second detection segment as the first signal segment, and determine the difference between the midpoint 522 of the second detection segment and the third rising edge 523 The target signal between them is determined as the second radio frequency signal segment.
  • the second device may not detect the first rising edge in the first detection segment corresponding to the first time window 540 , and may not detect the first rising edge in the second detection segment corresponding to the second time window 550 The second rising edge is not detected, and the third rising edge 533 is detected in the third detection segment corresponding to the third time window 560 .
  • the second device may determine the target signal between the midpoint 531 of the first detection segment and the midpoint 532 of the second detection segment as the first signal segment, and connect the midpoint 532 of the second detection segment to the third rising
  • the target signal between edges 533 is determined to be the second RF signal segment.
  • the second device can still divide the signal segment with the middle position of the detection segment as the starting point or end point, so as to ensure The length of each divided signal segment is substantially consistent with the first time interval. In this way, the influence of false rising edges and missing rising edges on the decoding result can be avoided, and the anti-interference capability of the second device is improved.
  • the clock signal of the second device may be unstable. Then, by detecting the rising edge of the target signal within the time window to divide the signal segment, the problem of incorrect division of the signal segment caused by the jitter of the clock signal of the second device can be avoided. In this way, the influence of the jitter or offset of the internal clock frequency of the chip on the synchronization is shielded.
  • Each division of the signal segment is based on a fixed time interval, which can eliminate the accumulated error generated by each division of the signal segment.
  • S306 The second device decodes each signal segment in the at least one signal segment to obtain a first signal source data sequence.
  • the second device can decode each signal segment, determine the source data corresponding to each signal segment, and then calculate the obtained signal source according to the sequence of the signal segments in the target signal.
  • the data is sorted to obtain a first source data sequence.
  • the second device may determine the source data corresponding to the signal segment ranked first in the target signal as the first source data in the first source data sequence, and the signal segment ranked second corresponds to The source data is determined to be the second source data in the first source data sequence.
  • the second device may first acquire the first unit signal and the second unit signal.
  • the first unit signal is a signal obtained by encoding source data
  • the second unit signal is a signal obtained by encoding source data 1.
  • the second device can generate the first unit signal and the second unit signal through a unit signal generating unit, and the unit signal generating unit can be a processor control software module, or components such as a memory, a gate counter, and a gate circuit. composed of physical equipment.
  • the second device may compare the degree of coincidence between the first signal segment and the first unit signal to obtain the first similarity.
  • the first similarity represents the degree of overlap between the first signal segment and the first unit signal, and may be, for example, a ratio of the same duration of the first signal segment and the second unit signal to the total duration of the first signal segment. For example, assuming that the duration of the first signal segment is 1ms, the first 0.6ms is a high-level signal, the last 0.4ms is a low-level signal, and the length of the first unit signal is 1ms, and the first 0.5ms is a high-level signal, The last 0.5ms is a low level signal. Then, the first signal segment is consistent with the first unit signal for 0.8 ms, and the first similarity may be 80%. Similarly, the second device may also compare the degree of coincidence between the first signal segment and the second unit signal to obtain the second similarity.
  • the second device may compare the degree of similarity of the first signal segment to the first unit signal, and compare the degree of similarity of the first signal segment to the second unit signal. In some other implementation manners, the second device may also compare the degree of similarity between the first signal segment and any one of the first unit signal and the second unit signal.
  • the second device may determine the first source data corresponding to the first signal segment according to the first similarity and/or the second similarity. For example, assuming that the second device determines the first degree of similarity and the second degree of similarity, the second device may compare the magnitudes of the first degree of similarity and the second degree of similarity.
  • the second device can determine that the first signal segment corresponds to the The source data is source data 0; if the first similarity is greater than the second similarity, it means that the degree of coincidence between the first signal segment and the first unit signal is lower than the degree of overlap between the first signal segment and the second unit signal, and the second The device may determine that the source data corresponding to the first signal segment is source data 1 .
  • the second device can determine the source data corresponding to the first signal segment through the processor, or can determine the source data corresponding to the first signal segment through a relatively simple digital circuit component such as a gate circuit or a comparator .
  • the first device may input the first signal segment and the first unit signal into two input segments of the XOR gate respectively, and then connect the output end of the XOR gate to the adder.
  • the XOR gate outputs a high level to the adder, and the count value of the adder is increased by 1.
  • the value accumulated in the adder increases every time the first signal segment is the same as the first unit signal. It can be seen that the value recorded in the adder can reflect the degree of coincidence between the first signal segment and the first unit signal, that is, the first similarity.
  • the second device can also obtain the second similarity in a similar manner.
  • the second device may use the outputs of the two adders representing the first similarity and the second similarity as the input of the comparator, so as to judge the two The size of the output of each adder, that is, comparing the size of the first similarity and the second similarity.
  • the target signal is decoded by components with relatively simple structures such as an adder, an XOR gate and a comparator, which reduces the complexity of the second device, and has the characteristics of low complexity, low area and low power consumption.
  • the second device is a passive RFID tag, the power obtained by the second device from the first device can be saved.
  • the second device may also compare the magnitude of the first similarity (or the second similarity) with a preset threshold. If the first similarity is greater than the preset threshold, it means that the first signal segment has a high degree of coincidence with the first unit signal, and the second device can determine that the source data corresponding to the first signal segment is source data 0; If the degree is greater than the preset threshold, it indicates that the degree of coincidence between the first signal segment and the second unit signal is relatively high, and the second device can determine that the source data corresponding to the first signal segment is source data 1.
  • the preset threshold may be 50%.
  • the second device can compare the waveform of the signal segment with the standard waveform (that is, the waveform of the first unit signal or the waveform of the second unit signal), and compare the waveform of the signal segment with the standard waveform (that is, the waveform of the first unit signal or the waveform of the second unit signal).
  • the degree of coincidence of the first unit signal or the second unit signal determines the source data corresponding to the signal segment. In this way, even if there is a difference between the waveform of the signal segment and the first unit signal or the second unit signal due to external interference, the degree of overlap can still determine whether the signal segment is generated by the first unit signal after interference or the second unit signal. produced after interference. In this way, the accuracy of the decoded source data can be ensured.
  • the second device may determine the sequence of each source data in the source data according to the sequence of the signal segments in the target signal, thereby obtaining the first source data sequence.
  • the first device that sends the source data sequence may encode the source data 0 and the source data 1 into a first unit signal and a second unit signal with the same duration, respectively, and send the data to the second unit signal.
  • the device sends the encoded source data sequence.
  • the second device may divide the target signal into at least one signal segment with a similar duration according to the duration of the first unit signal (or the second unit signal). In this way, by ensuring that the encoded time lengths of source data 0 and source data 1 are the same, signal segments can be divided according to time during the decoding process.
  • the RFID system using the method provided by the embodiment of the present application can be improved by 13 decibels compared with the traditional RFID system (model AZ-9654). (decibel, dB) interference.
  • the horizontal axis of FIG. 6 represents the signal-to-noise ratio
  • the vertical axis represents the bit error rate
  • different curves represent different encoding methods.
  • the second device is a terminal device including an RFID tag.
  • the first source data sequence acquired by the second device can be used to control the working states of other functional modules of the second device.
  • the second device is a low-power IoT terminal device, including a power supply, a passive RFID tag, a memory, and at least one functional module.
  • the technician can pre-store the target source data sequence in the memory.
  • the second device can control the passive RFID tag to be in a working state, and control the at least one functional module to be in a sleep state, that is, control the power supply not to supply power to the at least one functional module, thereby Save energy stored in the power supply.
  • the second device After receiving the first source data sequence sent by the first device through the passive RFID tag, the second device can compare whether the first source data sequence matches the target source data sequence. If matched, the second device can control the at least one functional module to be in a working state, that is, control the power supply to supply power to the at least one functional module. In this way, the electric energy stored in the second device can be saved, thereby extending the working time of the second device.
  • an embodiment of the present application further provides a data sending apparatus 700, and the data sending apparatus 700 can implement the function of the first device in the embodiment shown in FIG. 3 .
  • the data sending apparatus 700 includes an obtaining unit 701 , a processing unit 702 and a sending unit 703 .
  • the acquiring unit 701 is used to implement S301 in the embodiment shown in FIG. 3
  • the processing unit 702 is used to implement S302 in the embodiment shown in FIG. 3
  • the sending unit 703 is used to implement S303 in the embodiment shown in FIG. 3 .
  • the obtaining unit 701 is configured to obtain a sequence of source data to be sent, where the sequence of source data includes at least one source data 0, and/or at least one source data 1.
  • a processing unit 702 configured to encode the source data sequence to obtain a target signal, wherein the target signal includes at least one first unit signal, and/or at least one second unit signal, the first unit signal The signal is obtained by encoding the source data 0, the second unit signal is obtained by encoding the source data 1, and the first unit signal and the second unit signal have the same duration.
  • the sending unit 703 is configured to send the target signal to the second device.
  • an embodiment of the present application further provides a signal processing apparatus 800 , and the signal processing apparatus 800 can implement the function of the second device in the embodiment shown in FIG. 3 .
  • the signal processing apparatus 800 includes an acquisition unit 801 and a processing unit 802 .
  • the obtaining unit 801 is used to implement S304 in the embodiment shown in FIG. 3
  • the processing unit 802 is used to implement S305 and S306 in the embodiment shown in FIG. 3 .
  • the obtaining unit 801 is configured to obtain a target signal from the first device;
  • the target signal is a signal obtained by encoding a source data sequence, the source data sequence including at least one source data 0, and/or , at least one source data 1
  • the target signal includes at least one first unit signal, and/or, at least one second unit signal
  • the first unit signal is obtained by encoding the source data 0.
  • the second unit signal is obtained by encoding the source data 1
  • the duration of the first unit signal and the duration of the second unit signal are both the first time interval.
  • the processing unit 802 is configured to divide the target signal into at least one signal segment according to the first time interval; and decode each signal segment in the at least one signal segment to obtain a first signal source data sequence.
  • each functional unit in the embodiments of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • the acquiring unit and the processing unit may be the same unit or different units.
  • the above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.
  • FIG. 9 is a schematic structural diagram of a device 900 provided by an embodiment of the present application.
  • the above apparatus 700 can be implemented by the apparatus shown in FIG. 9 .
  • the device 900 includes at least one processor 901 , a communication bus 902 and at least one network interface 904 , and optionally, the device 900 may further include a memory 903 .
  • the processor 901 may be a general-purpose central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits (integrated circuits) used to control the execution of the programs of the present application. , IC).
  • the processor may be configured to process the configuration file to implement the data sending method provided in the embodiments of the present application.
  • the processor 901 may be configured to: acquire a source data sequence to be sent, where the source data sequence includes at least one source Data 0, and/or at least one source data 1, encode the source data sequence to obtain a target signal, wherein the target signal includes at least one first unit signal, and/or, at least one second unit signal, the first unit signal is obtained by encoding the source data 0, the second unit signal is obtained by encoding the source data 1, the first unit signal and the The duration of the second unit signal is the same; the target signal is sent to the second device.
  • Communication bus 902 is used to transfer information between processor 901 , network interface 904 and memory 903 .
  • the memory 903 can be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, and the memory 903 can also be a random access memory (RAM) or can store information and other types of dynamic storage devices for instructions, also can be compact disc read-only Memory (CD-ROM) or other optical disc storage, optical disc storage (including compact disc, laser disc, optical disc, digital versatile disc, Blu-ray optical disks, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, without limitation.
  • the memory 903 may exist independently and is connected to the processor 901 through the communication bus 902 .
  • the memory 903 may also be integrated with the processor 901 .
  • the memory 903 is used for storing program codes or instructions for executing the solutions of the present application, and the execution is controlled by the processor 901 .
  • the processor 901 is used to execute program codes or instructions stored in the memory 903 .
  • One or more software modules may be included in the program code.
  • the processor 901 may also store program codes or instructions for executing the solutions of the present application. In this case, the processor 901 does not need to read the program codes or instructions from the memory 903 .
  • the network interface 904 may be a device such as a transceiver for communicating with other devices or a communication network, and the communication network may be an Ethernet, a radio access network (RAN), or a wireless local area network (WLAN), or the like. In this embodiment of the present application, the network interface 904 may be configured to receive packets sent by other nodes in the segment routing network, and may also send packets to other nodes in the segment routing network.
  • the network interface 904 may be an ethernet (ethernet) interface, a fast ethernet (FE) interface, or a gigabit ethernet (GE) interface, or the like.
  • the device 900 may include multiple processors, such as the processor 901 and the processor 905 shown in FIG. 9 .
  • processors can be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor.
  • a processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (eg, computer program instructions).
  • FIG. 10 is a schematic structural diagram of a device 1000 provided by an embodiment of the present application.
  • the above apparatus 800 can be implemented by the device shown in FIG. 10 .
  • the device 1000 includes at least one processor 1001 , a communication bus 1002 and at least one network interface 1004 , and optionally, the device 1000 may further include a memory 1003 .
  • the processor 1001 may be a general-purpose central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits (integrated circuits) used to control the execution of the programs of the present application. , IC).
  • the processor may be used to process the configuration file to implement the signal processing method provided in the embodiments of the present application.
  • the processor 1001 can be used to: acquire a target signal from the first device; the target signal is encoding the source data sequence
  • the obtained signal, the source data sequence includes at least one source data 0, and/or, at least one source data 1
  • the target signal includes at least one first unit signal, and/or, at least one second unit signal
  • the first unit signal is obtained by encoding the source data
  • the second unit signal is obtained by encoding the source data 1
  • the duration of the second unit signal is the first time interval
  • the target signal is divided into at least one signal segment according to the first time interval, and each signal segment in the at least one signal segment is decoded to obtain the first time interval.
  • Communication bus 1002 is used to transfer information between processor 1001 , network interface 1004 and memory 1003 .
  • the memory 1003 can be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, and the memory 1003 can also be a random access memory (random access memory, RAM) or can store information. and other types of dynamic storage devices for instructions, also can be compact disc read-only Memory (CD-ROM) or other optical disc storage, optical disc storage (including compact disc, laser disc, optical disc, digital versatile disc, Blu-ray optical disks, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, without limitation.
  • the memory 1003 can exist independently and is connected to the processor 1001 through the communication bus 1002 .
  • the memory 1003 may also be integrated with the processor 1001 .
  • the memory 1003 is used for storing program codes or instructions for executing the solution of the present application, and the execution is controlled by the processor 1001 .
  • the processor 1001 is used to execute program codes or instructions stored in the memory 1003 .
  • One or more software modules may be included in the program code.
  • the processor 1001 may also store program codes or instructions for executing the solutions of the present application, in which case the processor 1001 does not need to read the program codes or instructions from the memory 1003 .
  • the network interface 1004 may be a device such as a transceiver for communicating with other devices or a communication network, which may be Ethernet, a radio access network (RAN), or a wireless local area network (WLAN), or the like.
  • the network interface 1004 may be configured to receive packets sent by other nodes in the segment routing network, and may also send packets to other nodes in the segment routing network.
  • the network interface 1004 may be an ethernet (ethernet) interface, a fast ethernet (FE) interface, or a gigabit ethernet (GE) interface, or the like.
  • the device 1000 may include multiple processors, such as the processor 1001 and the processor 1005 shown in FIG. 10 .
  • processors can be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor.
  • a processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (eg, computer program instructions).
  • FIG. 11 is a schematic structural diagram of a device 1100 provided by an embodiment of the present application.
  • the first device in Fig. 3 can be implemented by the device shown in Fig. 11 .
  • the device 1100 includes a main control board and one or more interface boards.
  • the main control board communicates with the interface board.
  • the main control board is also called a main processing unit (MPU) or a route processor card.
  • the main control board includes a CPU and a memory.
  • the main control board is responsible for the control and management of various components in the device 1100, including Route calculation, device management and maintenance functions.
  • Interface boards also known as line processing units (LPUs) or line cards, are used to receive and send messages.
  • LPUs line processing units
  • the communication between the main control board and the interface board or between the interface board and the interface board is through a bus.
  • the interface boards communicate through a switch fabric board.
  • the device 1100 also includes a switch fabric board.
  • the switch fabric board is communicatively connected to the main control board and the interface board.
  • the switch fabric board is used to forward the interface board.
  • the data between them, the switch fabric board can also be called a switch fabric unit (SFU).
  • the interface board includes a CPU, a memory, a forwarding engine, and an interface card (IC), wherein the interface card may include one or more network interfaces.
  • the network interface can be an Ethernet interface, an FE interface, or a GE interface.
  • the CPU is connected in communication with the memory, the forwarding engine and the interface card, respectively.
  • the memory is used to store the forwarding table.
  • the forwarding engine is used to forward the received packet based on the forwarding table stored in the memory. If the destination address of the received packet is the IP address of device 1100, the packet is sent to the CPU of the main control board or interface board for processing. Processing; if the destination address of the received packet is not the IP address of the device 1100, then look up the forwarding table according to the destination, if the next hop and outgoing interface corresponding to the destination address are found from the forwarding table, the packet Forwarding to the outbound interface corresponding to the destination address.
  • the forwarding engine may be a network processor (NP).
  • the interface card also known as the daughter card, can be installed on the interface board and is responsible for converting photoelectric signals into data frames, and after checking the validity of the data frames, forwards them to the forwarding engine for processing or the interface board CPU.
  • the CPU can also perform the function of a forwarding engine, such as implementing soft forwarding based on a general-purpose CPU, so that a forwarding engine is not required in the interface board.
  • the forwarding engine may be implemented by an ASIC or a field programmable gate array (FPGA).
  • the memory that stores the forwarding table may also be integrated into the forwarding engine as part of the forwarding engine.
  • the number of processors in the chip system may be one or more.
  • the processor can be implemented by hardware or by software.
  • the processor may be a logic circuit, an integrated circuit, or the like.
  • the processor may be a general-purpose processor implemented by reading software codes stored in memory.
  • the memory may be integrated with the processor, or may be provided separately from the processor, which is not limited in this application.
  • the memory can be a non-transitory processor, such as a read-only memory ROM, which can be integrated with the processor on the same chip, or can be provided on different chips.
  • the setting method of the processor is not particularly limited.
  • the chip system may be an FPGA, an ASIC, a system on chip (system on chip, SoC), a CPU, an NP, or a digital signal processing circuit (digital signal processor, DSP), can also be a microcontroller (micro controller unit, MCU), can also be a programmable logic device (programmable logic device, PLD) or other integrated chips.
  • SoC system on chip
  • DSP digital signal processing circuit
  • MCU microcontroller
  • PLD programmable logic device
  • each step of the first device in the foregoing method embodiment may be completed by an integrated logic circuit of hardware in a processor or an instruction in the form of software.
  • the method steps disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware processor, or executed by a combination of hardware and software modules in the processor.
  • FIG. 12 is a schematic structural diagram of a device 1200 provided by an embodiment of the present application.
  • the second device in FIG. 3 can be implemented by the device shown in FIG. 12 .
  • the device 1200 includes a main control board and one or more interface boards.
  • the main control board communicates with the interface board.
  • the main control board is also called a main processing unit (MPU) or a route processor card.
  • the main control board includes a CPU and a memory.
  • the main control board is responsible for the control and management of each component in the device 1200, including Route calculation, device management and maintenance functions.
  • Interface boards also known as line processing units (LPUs) or line cards, are used to receive and send messages.
  • LPUs line processing units
  • the communication between the main control board and the interface board or between the interface board and the interface board is through a bus.
  • the interface boards communicate through a switch fabric board.
  • the device 1200 also includes a switch fabric board.
  • the switch fabric board is communicatively connected to the main control board and the interface board.
  • the switch fabric board is used to forward the interface board.
  • the data between them, the switch fabric board can also be called a switch fabric unit (SFU).
  • the interface board includes a CPU, a memory, a forwarding engine, and an interface card (IC), wherein the interface card may include one or more network interfaces.
  • the network interface can be an Ethernet interface, an FE interface, or a GE interface.
  • the CPU is connected in communication with the memory, the forwarding engine and the interface card, respectively.
  • the memory is used to store the forwarding table.
  • the forwarding engine is used to forward the received packet based on the forwarding table stored in the memory. If the destination address of the received packet is the IP address of the device 1200, the packet is sent to the CPU of the main control board or interface board for processing. Processing; if the destination address of the received message is not the IP address of the device 1200, then look up the forwarding table according to the destination, if the next hop and outgoing interface corresponding to the destination address are found from the forwarding table, the message Forwarding to the outbound interface corresponding to the destination address.
  • the forwarding engine may be a network processor (NP).
  • the interface card also known as the daughter card, can be installed on the interface board and is responsible for converting photoelectric signals into data frames, and after checking the validity of the data frames, forwards them to the forwarding engine for processing or the interface board CPU.
  • the CPU can also perform the function of a forwarding engine, such as implementing soft forwarding based on a general-purpose CPU, so that a forwarding engine is not required in the interface board.
  • the forwarding engine may be implemented by an ASIC or a field programmable gate array (FPGA).
  • the memory that stores the forwarding table may also be integrated into the forwarding engine as part of the forwarding engine.
  • the number of processors in the chip system may be one or more.
  • the processor can be implemented by hardware or by software.
  • the processor may be a logic circuit, an integrated circuit, or the like.
  • the processor may be a general-purpose processor implemented by reading software codes stored in memory.
  • the memory may be integrated with the processor, or may be provided separately from the processor, which is not limited in this application.
  • the memory can be a non-transitory processor, such as a read-only memory ROM, which can be integrated with the processor on the same chip, or can be provided on different chips.
  • the setting method of the processor is not particularly limited.
  • the chip system may be an FPGA, an ASIC, a system on chip (system on chip, SoC), a CPU, an NP, or a digital signal processing circuit (digital signal processor, DSP), can also be a microcontroller (micro controller unit, MCU), can also be a programmable logic device (programmable logic device, PLD) or other integrated chips.
  • SoC system on chip
  • DSP digital signal processing circuit
  • MCU microcontroller
  • PLD programmable logic device
  • each step of the second device in the foregoing method embodiment may be completed by an integrated logic circuit of hardware in a processor or an instruction in the form of software.
  • the method steps disclosed in conjunction with the embodiments of the present application may be directly embodied as being executed by a hardware processor, or executed by a combination of hardware and software modules in the processor.
  • Embodiments of the present application further provide a computer-readable storage medium, including instructions, when running on a computer, to cause the computer to execute the data sending method provided by the above method embodiments and executed by the first device, or to cause the computer
  • the signal processing method provided by the above method embodiment and executed by the second device is executed.
  • Embodiments of the present application further provide a computer program product including instructions, which, when run on a computer, causes the computer to execute the data sending method provided by the above method embodiments and executed by the first device, or causes the computer to execute the above method.
  • the signal processing method provided by the method embodiment and executed by the second device.
  • the disclosed system, apparatus and method may be implemented in other manners.
  • the apparatus embodiments described above are only illustrative.
  • the division of the units is only a logical module division.
  • multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be acquired according to actual needs to achieve the purpose of the solution in this embodiment.
  • each module unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • the above-mentioned integrated unit may be implemented in the form of hardware, or may be implemented in the form of software module units.
  • the integrated unit if implemented in the form of a software module unit and sold or used as a stand-alone product, may be stored in a computer-readable storage medium.
  • the technical solutions of the present application can be embodied in the form of software products in essence, or the parts that contribute to the prior art, or all or part of the technical solutions, and the computer software products are stored in a storage medium , including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: U disk, mobile hard disk, Read-Only Memory (ROM, Read-Only Memory), Random Access Memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes .
  • the functions described in the present invention may be implemented in hardware, software, firmware, or any combination thereof.
  • the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium.
  • Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another.
  • a storage medium can be any available medium that can be accessed by a general purpose or special purpose computer.

Abstract

一种数据发送方法、信号处理方法及装置，旨在通过调整编码规则和解码规则，降低外界干扰对无线信号传输的影响，提升抗干扰能力。其中，所述数据发送方法包括：第一设备获取待发送的信源数据序列（S301），所述信源数据序列包括至少一个信源数据0，和/或，至少一个信源数据1；所述第一设备对所述信源数据序列进行编码（S302），得到目标信号，其中，所述目标信号包括至少一个第一单位信号，和/或，至少一个第二单位信号，所述第一单位信号是对所述信源数据0进行编码得到的，所述第二单位信号是对所述信源数据1进行编码得到的，所述第一单位信号和所述第二单位信号的时长相同；所述第一设备向第二设备发送所述目标信号（S303）。

Description

一种数据发送方法、信号处理方法及装置
本申请要求于2021年03月23日提交中国专利局、申请号为202110308818.X、发明名称为“一种数据发送方法、信号处理方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其设计一种数据发送方法、信号处理方法及装置。
背景技术
射频识别(Radio Frequency Identification，RFID)技术，是一种非接触式的自动识别技术。RFID标签(Tag)可以向预先存储的信源数据序列调制到载波信号上，并向RFID标签阅读器(Reader)发送无线信号。其中，信源数据序列中可以包括一个或多个信源数据0和/或信源数据1，该无线信号为模拟信号。RFID标签阅读器可以接收RFID标签发送的无线信号，并通过包络检波、滤波和模数转换等步骤从无线信号中确定信源数据序列，从而得到RFID标签发送的信息。如此，实现了RFID标签阅读器与RFID标签之间的无线通信。相应地，RFID标签阅读器也可以通过无线信号向RFID标签发送其他信源数据序列，RFID标签也可以根据无线信号接收RFID标签阅读器发送的数据。
为了防止无线信号被干扰，RFID标签阅读器(或RFID标签)可以先对信源数据序列进行编码为中间信号，再将编码后的中间信号调制到载波信号上发送。相应的，RFID标签(或RFID标签阅读器)在接收到无线信号后，可以先将无线信号转换为数字信号，再对数字信号进行解码确定信源数据序列。
在传统的编码方式中，大多将信源数据0和信源数据1编码为时长不同的中间信号。那么在解码时，可以依据上升沿或下降沿将中间信号划分为多个信号段，再根据每个信号段的时长确定该信号段对应的信源数据。但是，在信号干扰功率比(Signal Interference Ratio，SIR)较低，即干扰较强的环境下，传统的解码的方法误差较大。
发明内容
本申请实施例提供了一种数据发送方法、信号处理方法及装置，旨在通过调整编码规则和解码规则，降低外界干扰对无线信号传输的影响，提升抗干扰能力。
第一方面，本申请实施例提供了一种数据发送方法，该方法可以应用于向第二设备发送信号的第一设备，包括：第一设备获取待发送的信源数据序列，该信源数据序列可以包括至少一个信源数据0和/或至少一个信源数据1。在得到信源数据序列后，第一设备可以对信源数据进行编码得到目标信号，并向第二设备发送该目标信号。在对信源数据序列进行编码时，第一设备可以将信源数据0编码为第一单位信号，将信源数据1编码为单位信号，且第一单位信号的时长与第二单位信号的时长相等。这样，在第二设备对目标设备进行解码时，由于第一单位信号的时长与第二单位信号的时长相等，第二设备可以根据第一 单位信号(或第二单位信号)的时长划分信号段，不需要根据上升沿划分信号段，从而减少了虚假上升沿和上升沿丢失对解码结果的影响。如此，通过调整编码规则和解码规则，降低了外界干扰对无线信号传输的影响，提升了抗干扰能力。
在一种可能的实现中，第一设备对信源数据序列进行编码的过程可以包括预编码和二次编码两步，其中，二次编码又称线路码编码。在对信源数据序列进行预编码时，第一设备可以将信源数据0预编码为包括m个中间数据0和n个中间数据1的中间数据序列，将信源数据1预编码为包括m个中间数据0和n个中间数据1的中间数据序列，且信源数据1预编码得到的中间数据序列与信源数据0预编码得到的中间数据序列不同。其中，m和n为大于等于1的正整数。也就是说，信源数据1和信源数据0经过预编码后得到的中间数据序列中，中间数据0的个数相等且中间数据1的个数相等。那么，在对中间数据序列进行二次编码，得到的目标信号的波形不同，但是长度相同。如此，在保证第一单位信号与第二单位信号存在差异的基础上，使得第一单位信号和第二单位信号的时长相同。
在一种可能的实现中，二次编码的方式可以为脉冲宽度编码(Pulse Interval Encoding，PIE)。
在一种可能的实现中，所述第一设备包括射频识别RFID标签阅读器，所述第二设备包括RFID标签。
在一种可能的实现中，所述第一设备为包括所述RFID标签阅读器的基站，所述第二设备为包括所述RFID标签的终端设备，所述信源数据序列用于启动所述第二设备。
第二方面，本申请实施例提供了一种信号处理方法，该方法可以应用于接收来自第一设备的信号的第二设备，包括：第二设备获取来自第一设备的目标信号。该目标信号为第一设备对信源数据序列码编码后得到的信号，信源数据序列包括至少一个信源数据0，和/或，至少一个信源数据1。在编码过程中，信源数据0被编码为第一单位信号，信源数据1被编码为第二单位信号，且第一单位信号的时长与第二单位信号的时长相同，均为第一时间间隔。在获取到目标信号后，第二设备可以根据第一时间间隔将目标信号划分为至少一个信号段，每个信号段的时长与第一时间间隔相等或相近。接着，第二设备可以分别对至少一个信号段中每个信号段进行解码，从而确定每个信号段对应的信源数据，得到第一信源数据序列。这样，由于信源数据0和信源数据1被编码后得到的信号的时长相等，第二设备可以根据第一时间间隔划分信号段，不需要根据上升沿划分信号段，从而减少了虚假上升沿和上升沿丢失对解码结果的影响。如此，通过调整编码规则和解码规则，降低了外界干扰对无线信号传输的影响，提升了抗干扰能力。
在一种可能的实现中，第二设备可以根据时间间隔确定检测段，并根据检测段的模型划分信号段。具体地，以前述至少一个信号段包括第一信号段为例进行说明。在从目标信号中划分第一信号段时，第二设备可以先根据第一时间间隔确定第一时间窗和第二时间窗，并从目标信号中确定与第一时间窗对应的第一检测段和与第二时间窗对应的第二检测段。其中，第一时间窗的起始点与第二时间窗的起始点之间的间隔为预设时间间隔。在确定了第一检测段和第二检测段之后，可以根据第一检测段的波形和第二检测段的波形将目标信 号划分为第一信号段。例如，第二设备可以根据第一检测段的波形和第二检测段的波形中是否包括上升沿划分第一信号段。
在一种可能的实现中，如果第一检测段的波形包括第一上升沿，且第二检测段的波形包括第二上升沿，那么第二设备可以将第一上升沿与第二上升沿之间的目标信号确定为第一信号段；如果第一检测段的波形包括第一上升沿，且第二检测段的波形不包括第二上升沿，第二设备可以将第一上升沿与第二检测段的波形的中点之间的目标信号确定为第一信号段；如果第一检测段的波形不包括第一上升沿，且第二检测段的波形包括第二上升沿，第二设备可以将第一检测段的波形的中点与第二上升沿之间的目标信号确定为第一信号段；如果第一检测段的波形不包括第一上升沿，且第二检测段的波形不包括第二上升沿，第二设备将第一检测段的波形的中点与第二检测段的波形的中点之间的目标信号确定为第一信号段。这样，通过检测目标信号在时间窗内的上升沿划分信号段，可以避免因第二设备的时钟信号的抖动导致的信号段划分出错的问题。如此，屏蔽了芯片内部时钟频率的抖动或者偏移对同步的影响。而每次划分信号段均以固定的时间间隔为基础，可以消除每次划分信号段产生的累积误差。
在一种可能的实现中，第一时间窗的时长小于第一时间间隔，且第二时间窗的时长也小于第一时间间隔。这样，能够尽可能降低虚假上升沿和上升沿对第一检测段和第二检测段的影响，从而提高第二设备的抗干扰能力。
在一种可能的实现中，第二设备在对至少一个信号段进行解码时，可以逐个比较信号段与第一单位信号和第二单位信号的相似度。例如，第二设备可以比较第一信号段和第一单位信号的相似程度，得到第一相似度。第二设备还可以比较第二射频信号段和第二单位信号的相似程度，得到第二相似度。接着，第二设备可以根据第一相似度和/或第二相似度确定第一信号段对应的信源数据。这样，即使由于外界干扰导致信号段的波形与第一单位信号或第二单位信号之间存在差异，通过重合程度仍然可以确定信号段是第一单位信号经过干扰后产生的，还是第二单位信号经过干扰后产生的。如此，可以确保解码得到的信源数据的准确性。
在一种可能的实现中，第二设备可以比较第一相似度和第二相似度的大小，如果第一相似度大于第二相似度，说明第一信号段的波形与第一单位信号的波形更为接近，客户端可以确定第一信号段对应的信源数据为信源数据0；如果第一相似度小于第二相似度，说明第一信号段的波形与第二单位信号的波形更为接近，客户端可以确定第一信号段对应的信源数据为信源数据1。
在一些可能的实现中，目标信号是被调制到载波信号上发送给第二设备的。那么，第二设备可以通过天线等设备接收第一设备发送的第一射频信号，再对该第一射频信号进行滤波，过滤掉第一射频信号中的高频分量和干扰信号，得到第二射频信号。接着，第二设备可以再将第二射频信号转换为数字信号，得到目标信号。
在一些可能的实现中，为了防止外界环境的干扰，第二设备可以采用两个滤波器对第一射频喜好进行滤波。具体的，第二设备可以先通过第一低通滤波器对第一射频信号进行 滤波，得到中间信号；再通过第二低通滤波器对中间信号进行滤波，得到第二射频信号。其中，其中，所述第一低通滤波器的截止频率高于所述第二低通滤波器的截止频率。
在一些可能的实现中，所述第二低通滤波器的截止频率为所述目标信号中低电平或高电平的最短时长的倒数。
在一些可能的实现中，其特征在于，所述第一设备包括RFID标签阅读器，所述第二设备包括RFID标签。
在一些可能的实现中，所述第一设备为包括所述RFID标签阅读器的基站，所述第二设备为包括RFID标签的终端设备。
在一些可能的实现中，当第二设备为包括RFID的终端设备时，第二设备还可以在得到所述第一信源数据序列之后比较第一信源数据序列与预先存储的目标信源数据序列是否匹配，若匹配，则控制终端设备进入工作状态。如此，可以节省第二设备中存储的电能，从而延长第二设备的工作时间。
第三方面，本申请实施例提供了一种数据发送装置，该装置位于前述第一设备，包括：获取单元，用于获取待发送的信源数据序列，所述信源数据序列包括至少一个信源数据0，和/或，至少一个信源数据1；处理单元，用于对所述信源数据序列进行编码，得到目标信号，其中，所述目标信号包括至少一个第一单位信号，和/或，至少一个第二单位信号，所述第一单位信号是对所述信源数据0进行编码得到的，所述第二单位信号是对所述信源数据1进行编码得到的，所述第一单位信号和所述第二单位信号的时长相同；发送单元，用于向第二设备发送所述目标信号。
在一些可能的实现中，所述处理单元，用于对所述信源数据序列进行预编码，得到中间数据序列，其中，所述信源数据序列中的每个信源数据分别被预编码为m个中间数据0和n个中间数据1，所述m和n均为大于或等于1的整数；对所述中间数据序列进行二次编码，得到目标信号。
在一些可能的实现中，所述处理单元，用于对所述中间数据序列进行脉冲宽度编码PIE，得到目标信号。
在一些可能的实现中，，所述第一设备包括射频识别RFID标签阅读器，所述第二设备包括RFID标签。
在一些可能的实现中，，所述第一设备为包括所述RFID标签阅读器的基站，所述第二设备为包括所述RFID标签的终端设备，所述信源数据序列用于启动所述第二设备。
第四方面，本申请实施例提供了一种信号处理装置，所述装置位于第二设备，包括：获取单元，用于获取来自第一设备的目标信号；所述目标信号为对信源数据序列编码得到的信号，所述信源数据序列包括至少一个信源数据0，和/或，至少一个信源数据1，所述目标信号包括至少一个第一单位信号，和/或，至少一个第二单位信号，所述第一单位信号是对所述信源数据0进行编码得到的，所述第二单位信号是对所述信源数据1进行编码得到的，所述第一单位信号的时长和所述第二单位信号的时长均为第一时间间隔；处理单元，用于根据所述第一时间间隔将所述目标信号划分为至少一个信号段；对所述至少一个信号段中每个信号段进行解码，得到第一信源数据序列。
在一些可能的实现中，所述处理单元，用于根据所述第一时间间隔从所述目标信号中确定与第一时间窗对应的第一检测段和与第二时间窗对应的第二检测段，所述第一时间窗的起始点与所述第二时间窗的起始点之间的间隔为所述预设时间间隔；根据所述第一检测段的波形和所述第二检测段的波形将所述目标信号划分为所述第一信号段。
在一些可能的实现中，所述第一时间窗检测段的时长小于所述第一时间间隔，所述第二时间戳的时长小于所述第一时间间隔。
在一些可能的实现中，所述处理单元，用于响应于所述第一检测段的波形包括第一上升沿，且所述第二检测段的波形包括第二上升沿，将所述第一上升沿与所述第二上升沿之间的目标信号确定为第一信号段。
在一些可能的实现中，所述处理单元，用于响应于所述第一检测段的波形包括第一上升沿，且所述第二检测段的波形不包括第二上升沿，将所述第一上升沿与所述第二检测段的波形的中点之间的目标信号确定为第一信号段。
在一些可能的实现中，所述处理单元，用于响应于所述第一检测段的波形不包括第一上升沿，且所述第二检测段的波形不包括第二上升沿，将所述第一检测段的波形的中点与所述第二检测段的波形的中点之间的目标信号确定为第一信号段。
在一些可能的实现中，，所述至少一个信号段包括第一信号段；所述处理单元，用于比较所述第一信号段与第一单位信号的相似程度，得到第一相似度，和/或，比较所述第一信号段与第二单位信号的相似程度，得到第二相似度；根据所述第一相似度和/或所述第二相似度，确定所述第一信号段对应的第一信源数据。
在一些可能的实现中，所述处理单元，用于比较所述第一相似度与所述第二相似度的大小；响应于所述第一相似度大于所述第二相似度，确定所述第一信号段对应的信源数据为信源数据0；响应于所述第一相似度小于所述第二相似度，确定所述第一信号段对应的信源数据为信源数据1。
在一些可能的实现中，所述处理单元包括第一异或门、第二异或门、第一加法器、第二加法器和一个比较器；所述第一异或门，用于比较所述第一信号段与所述第一单位信号的相似程度；所述第二异或门，用于比较所述第一信号段与所述第二单位信号的相似程度；所述第一加法器，用于记录所述第一相似度；所述第二加法器，用于记录所述第二相似度；所述比较器，用于比较所述第一相似度与所述第二相似度的大小。
在一些可能的实现中，所述接收单元，用于接收所述第一设备发送的第一射频信号；对所述第一射频信号进行滤波得到第二射频信号；对所述第二射频信号进行模数转换，得到所述目标信号。
在一些可能的实现中，所述处理单元，用于通过第一低通滤波器对所述第一射频信号进行滤波，得到中间信号；通过第二低通滤波器对所述中间信号进行滤波，得到第二射频信号；其中，所述第一低通滤波器的截止频率高于所述第二低通滤波器的截止频率。
在一些可能的实现中，所述第二低通滤波器的截止频率为所述目标信号中低电平或高电平的最短时长的倒数。
在一些可能的实现中，所述第一设备包括RFID标签阅读器，所述第二设备包括RFID标签。
在一些可能的实现中，所述第一设备为包括所述RFID标签阅读器的基站，所述第二设备为包括RFID标签的终端设备。
在一些可能的实现中，所述处理单元，还用于比较所述第一信源数据序列与预先存储的目标信源数据序列是否匹配，若匹配，则控制所述终端设备进入工作状态。
第五方面，本申请实施例提供了一种设备，所述设备包括：至少一个处理器，所述至少一个处理器与至少一个存储器耦合；所述至少一个处理器，用于执行所述至少一个存储器中存储的计算机程序或指令，使得所述设备执行前述第一方面所述的数据发送方法。
在一些可能的实现中，所述设备为包括RFID标签阅读器的基站。
第六方面，本申请实施例提供了一种设备，所述设备包括：至少一个处理器，所述至少一个处理器与至少一个存储器耦合；所述至少一个处理器，用于执行所述至少一个存储器中存储的计算机程序或指令，使得所述设备执行前述第二方面所述的信号处理方法。
在一些可能的实现中，所述设备为包括RFID标签的终端设备。
第七方面，本申请实施例提供了一种计算机可读存储介质，包括指令、程序或代码，当所述指令、程序或代码在计算机上执行时，使得所述计算机执行如前述第一方面所述的数据发送方法，或使得所述计算机执行如前述第二方面所述的信号处理方法。
附图说明
图1为本申请实施例提供的RFID系统的一种结构示意图；
图2为本申请实施例提供的一种信号波形的示意图；
图3为本申请实施例提供的数据发送方法的信令交互图；
图4为本申请实施例提供的另一种信号波形的示意图；
图5为本申请实施例提供的又一种信号波形的示意图；
图6为本申请实施例提供的一种仿真结果图；
图7为本申请实施例提供的一种数据发送装置700的结构示意图；
图8为本申请实施例提供的一种信号处理装置800的结构示意图；
图9为本申请实施例提供的一种设备900的结构示意图；
图10为本申请实施例提供的一种设备1000的结构示意图；
图11为本申请实施例提供的一种设备1100的结构示意图；
图12为本申请实施例提供的一种设备1200的结构示意图。
具体实施方式
本下面结合附图对传统技术和本申请实施例提供的数据发送方法和信号处理方法进行介绍。
参见图1，该图为本申请实施例提供的RFID系统的一种结构示意图。其中，该RFID系统包括RFID标签110和RFID标签阅读器120。在向RFID标签110发送信源数据序列 时，RFID标签阅读器120可以对信源数据序列进行编码，得到目标信号，再将该目标信号调制到载波得到无线信号，并向RFID标签110发送该无线信号。RFID标签110可以通过天线接收RFID标签阅读器120发送的无线信号，并通过包络检波器、低频滤波器和模数转换器等元器件对无线信号进行处理，将无线信号转换为数字信号格式的目标信号。接着，RFID标签110可以根据RFID标签阅读器120的编码方式对应的解码方式对目标信号进行解码，最终确定RFID标签阅读器120发送的信源数据序列。
同理，RFID标签110也可以通过相似的方法向RFID标签阅读器120发送其他数据。具体过程与前述过程类似，这里不再赘述。
目前，在对信源数据进行编码时，信源数据0编码后得到的信号的时长和信源数据1编码后得到的信号的时长可以不同。相应的，在对目标信号进行解码时，可以根据目标信号中的上升沿(Rising Edge)或下降沿(Falling Edge)将目标信号划分为一个或多个信号段，再依据每个信号段的时长判断该信号段对应的信源数据。其中，上升沿为目标信号从低电平变化到高电平的时刻，下降沿为目标信号从高电平变化到低电平的时刻。
下面以编码方式为脉冲宽度编码为例进行说明。
当信源数据序列以PIE的方式进行编码时，信源数据序列中的信源数据0被编码为一个时钟单位的高电平和一个时钟单位的低电平的目标信号。其中，时钟单位指编码信源数据序列的设备(例如RFID标签或RFID标签阅读器)的时钟信号翻转一次(或多次)的时间，或时钟信号一个周期的时间。具体地，信源数据0被编码后的，其具体波形可以如图2中波形210所示。该波形210包括时长为1个时钟单位的高电平信号211和时长为1个时钟单位的低电平信号212，且以上升沿213结束。可见，在对信源数据0进行脉冲宽度编码后，得到的目标信号的时长为两个时钟单位。在本申请实施例中，图2以及后续各个波形图中各个坐标系的纵坐标表示信号电平的大小，横轴为时间轴，任意两条相邻的细虚线之间的时长为一个时钟单位。
当信源数据序列以PIE的方式进行编码时，信源数据序列中的信源数据1被编码为三个时钟单位的高电平和一个时钟单位的低电平的目标信号。具体地，信源数据1被编码后的，其具体波形可以如图2中波形220所示。其中，该波形220包括时长为3个时钟单位的高电平信号221和时长为1个时钟单位的低电平信号222，且以上升沿223结束。可见，在对信源数据1进行脉冲宽度编码后，得到的目标信号的时长为四个时钟单位。
在对目标信号进行解码时，RFID标签110(或RFID标签阅读器120)可以检测目标信号的上升沿，并将两个上升沿之间的信号划分为一个信号段，再根据信号段的时长确定该信号段对应的信源数据。例如，RFID标签110(或RFID标签阅读器120)可以比较信号段的时长与三个时钟单位的时长之间的大小。如果信号段的时长大于三个时钟单位的时长，说明该信号段对应的信源数据为1；如果信号段的时长小于三个时钟单位的时长，说明该信号段对应的信源数据为0。
仍以图2为例进行说明。图2中波形230为信源数据序列“10”编码后得到的目标信号的波形，包括时长为3个时钟单位的高电平信号231、时长为1个时钟单位的低电平信号232、时长为1个时钟单位的高电平信号234和时长为1个时钟单位的低电平信号235。 其中，高电平信号231的起始位置为上升沿。
在对目标信号进行解码时，RFID标签110(或RFID标签阅读器120)可以根据上升沿237、上升沿233和上升沿236将目标信号划分为2个信号段，第一个信号段的波形包括高电平信号231和低电平信号232，时长为4个时钟单位；第二个信号段的波形包括高电平信号234和低电平信号235，时长为2个时钟单位。由于第一个信号段的时长大于三个时钟单位的时长，RFID标签110(或RFID标签阅读器120)可以确定信源数据序列中第一个信源数据为1；由于第二个信号段的时长小于三个时钟单位的时长，RFID标签110(或RFID标签阅读器120)可以确定信源数据序列中第二个信源数据为0。
但是，在SIR较高的情况下，目标信号中可能会因干扰产生波动，从而出现虚假的上升沿或丢失上升沿。例如，图2中波形240中出现了虚假的上升沿242，波形250丢失了上升沿253。
那么在解码波形240对应的目标信号时，RFID标签(或RFID标签阅读器120)可以根据上升沿249、上升沿242、上升沿245和上升沿248将目标信号划分为3个信号段，第一个信号段的波形包括高电平信号241；第二个信号段的波形包括高电平信号243和低电平信号244；第三个信号段的波形包括高电平信号246和低电平信号247，解码得到的信源数据序列为“000”，与信源数据序列“10”不同。在解码波形250对应的目标信号时，RFID标签(或RFID标签阅读器120)可以根据上升沿251和上升沿255将目标信号划分为1个信号段，该信号段的波形包括高电平信号252和低电平信号254，解码得到的信源数据序列为“1”，与信源数据序列“10”不同。
可见，由于现有的解码技术根据上升沿确定信号段，在强干扰的环境下，RFID标签或RFID标签阅读器120可能无法准确地划分信号段，影响解码结果，抗干扰能力较差。
为了解决上述问题，本申请实施例提供了一种数据发送方法及信号解码方法，该方法通过确保信源数据0和信源数据1编码后得到的目标信号的长度相同，使得解码时无需根据上升沿划分信号段，减少了虚假上升沿和上升沿丢失对解码结果的影响。如此，通过调整编码规则和解码规则，降低了外界干扰对无线信号传输的影响，提升了抗干扰能力。
本申请实施例提供的方法可以应用于图1所示的RFID系统。RFID标签110可以是有源RFID标签，也可以是无源RFID标签。其中，有源RFID标签是指具有电源的RFID标签，无源RFID标签是指不具有电源的RFID标签。相应地，当RFID标签110为有源RFID标签是，RFID标签阅读器120可以是有源RFID标签阅读器；当RFID标签110为无源RFID标签是，RFID标签阅读器可以是无源RFID标签阅读器。当RFID标签110为无源RFID标签时，RFID标签阅读器120还包括能量发送装置，用于通过向RFID标签110发送电能，RFID标签110还包括能量接收装置，用于接收RFID标签阅读器120发送的电能。
在本申请实施例中，RFID标签110和RFID标签阅读器120可以属于终端设备。终端设备，又可以称为用户设备(user equipment，UE)、移动台(mobile station，MS)、移动终端(mobile terminal，MT)、终端等，是一种向用户提供语音和/或数据连通性的 设备，或，设置于该设备内的芯片，例如，具有无线连接功能的手持式设备、车载设备等。目前，一些终端设备的举例为：手机、台式电脑、平板电脑、笔记本电脑、掌上电脑、移动互联网设备(mobile internet device，MID)、可穿戴设备，虚拟现实(virtual reality，VR)设备、增强现实(augmented reality，AR)设备、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程手术(remote medical surgery)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端、支持5G接入的家庭网关设备(5G-residential gateway，5G-RG)等。
在一些可能的实现中，RFID标签110属于基站，RFID标签阅读器120属于终端设备。可选地，该终端设备可以为物联网终端设备。在终端设备接收到目标信源数据序列前，终端设备可以控制除RFID标签阅读器120以外的其他功能模块处于休眠状态。当终端设备通过RFID标签阅读区120接收到基站通过RFID标签110发送的目标信源数据序列后，终端设备可以唤醒休眠的功能模块。关于这部分内容的详细介绍可以参见下文这里不再赘述。
除了RFID系统以外，本申请实施例所提供的方法还可以应用在其他通过无线射频信号传输数据的场景。可以理解的是，任意一个需要向其他设备发送信源数据序列的设备均可执行本申请实施例提供的数据发送方法。同样，任意一个需要接收其他设备发送的信源数据序列的设备均可执行本申请实施例提供的信号处理方法。RFID系统仅是本申请优选的一种应用场景，并不代表本申请实施例提供的方法仅能应用于RFID系统中。
参见图3，该图3为本申请实施例提供的一种数据发送方法的数据交互图。本申请实施例提供的数据发送方法包括如下步骤：
S301：第一设备获取待发送的信源数据序列。
在向第二设备发送信号前，第一设备可以先获取待发送的信源数据序列。其中，第一设备可以是图1所示实施例中RFID标签阅读器120，例如可以是有源RFID标签阅读器或无源RFID标签阅读器；第二设备可以是图1所示实施例中RFID标签110，例如可以是有源RFID标签或无源RFID标签。当然，第一设备还可以是RFID标签110，第二设备为RFID标签阅读器120。为了便于说明，后续以第一设备为RFID标签阅读器120，第二设备为RFID标签110为例进行说明。信源数据序列可以包括至少一个信源数据0，和/或，至少一个信源数据1。该信源数据序列为第一设备实际要发送给第二设备的数据，以便第二设备根据信源数据序列执行相应地操作。
在本申请实施例中，信源数据可以以程序的方式存储在第一设备中，也可以以硬件电路的方式存储在第一设备中，本申请实施例对此不作限定。
S302：第一设备对所述信源数据序列进行编码，得到目标信号。
在得到信源数据序列后，第一设备可以对信源数据序列进行编码，得到目标信号。其中，目标信号可以包括至少一个时钟单位的高电平信号和至少一个时钟单位的低电平信号。时钟单位可以是第一设备的时钟信号翻转一次的时长，也可以是时钟信号一 个或多个周期的时长。在本申请实施例中，第一设备和第二设备可以包括用于产生时钟信号的装置，例如可以是晶振等电子元件。在一些可能的实现中，时钟信号的频率为1.92兆赫兹(Million Hertz，MHz)。
在对信源数据序列进行编码时，第一设备可以依次对信源数据序列中每个信源数据进行编码，再根据信源数据在信源数据序列中的顺序将编码后得到的信号按顺序排列，得到目标信号。在本申请实施例中，对信源数据0进行编码后得到的信号被称为第一单位信号，对信源数据1进行编码后得到的信号被称为第二单位信号。那么，在对信源数据序列进行编码后，得到的目标信号包括至少一个第一单位信号和/或至少一个第二单位信号。
根据前文介绍可知，导致现有技术中无线信号的抗干扰能力差的主要原因是信源数据0和信源数据1在编码后得到的信号时长不等，因此需要通过上升沿划分信号段。为了解决这一问题，在本申请实施例中，第一单位信号的时长和第二单位信号的时长相等。这样在解码的过程中可以根据第一单位信号(或第二单位信号)的时长划分信号段，从而避免受到虚假上升沿或上升沿丢失的影响。
在一种可能的实现中，第一设备可以先对信源数据序列进行预编码，得到中间数据序列，再对中间数据序列进行二次编码，得到目标信号。其中，二次编码又可以被称为线路码编码，所采用的编码方式可以与传统的编码方式相同，例如可以采用PIE、不归零(Not Return to Zero)码或曼彻斯特码等编码方式。预编码所采用的编码方式可以将信源数据1编码为具有m个中间数据0和n个中间数据1的中间数据序列，将信源数据1编码为同样具有m个中间数据0和n个中间数据1的中间数据序列。其中，m和n为大于或等于1的正整数。也就是说，在信源数据1和信源数据0经过预编码后得到的中间数据序列中，中间数据0的个数相等且中间数据1的个数相等。
举例说明。假设二次编码方式为脉冲宽度编码，且预编码所采用的编码方式可以将信源数据1编码为序列“10”，将信源数据0编码为序列“01”。那么，信源数据0在被预编码后，可以得到中间数据序列“01”，再经过脉冲宽度编码，得到的第一单位信号如图4中波形410所示，由一个时钟单位的高电平信号411、一个时钟单位的低电平信号412、三个时钟单位的高电平信号413和一个时钟单位的低电平信号414按顺序组成。信源数据1在被预编码后，可以得到中间数据序列“10”，再经过脉冲宽度编码，得到的第二单位信号如图3中波形420所示，由三个时钟单位的高电平信号421、一个时钟单位的低电平信号412、一个时钟单位的高电平信号423和一个时钟单位的低电平信号424按顺序组成。可见，信源数据1和信源数据0在经过预编码和二次编码后得到的信号的波形不同，但是长度相同。如此，在保证第一单位信号与第二单位信号存在差异的基础上，使得第一单位信号和第二单位信号的时长相同。
需要说明的是，将信源数据1编码为中间数据序列“10”，将信源数据0编码为中间数据序列“01”仅仅是本申请实施例提供的一种实现方式。在一些其他的实现方式中，第一设备还可以通过walsh码或gold码等编码方式对信源数据序列进行预编码。当然，第一设备可以通过其他方式对信源数据进行预编码，例如将信源数据1编码为 “0101”，将信源数据0编码为“1010”。
S303：第一设备向第二设备发送所述目标信号。
在将信源数据序列编码为目标信号后，第一设备可以向第二设备发送该目标信号。可选地，第一设备可以将目标信号调制到高频载波上，得到第一射频信号，再通过天线将第一射频信号发送给第二设备。
在本申请实施例中，第二设备为包括RFID标签的设备，例如可以是包括RFID标签的终端设备。在一种可能的实现中，第二设备为低功耗物联网终端设备。相应的，第一设备可以是包括RFID标签阅读器的基站。
S304：第二设备获取来自第一设备的目标信号。
第二设备可以通过信号接收装置接收第一射频信号。在接收到第一设备发送的第一射频信号后，第二设备可以对第一射频信号进行处理，从而获取来自第一设备的目标信号。例如，第二设备可以通过天线接收第一设备信号，并通过包络检波器、滤波器、模数转换器等设备对第一射频信号进行处理，得到目标信号。其中，目标信号为数字信号，包括至少一个时钟单位的高电平信号和至少一个时钟单位的低电平信号。
在本申请实施例中，为了进一步降低外界环境对解码结果的干扰，第二设备可以通过二级低通滤波器对第一射频信号进行滤波。其中，该二级低通滤波器包括第一低通滤波器和第二低通滤波器。其中，第一低通滤波器的截止频率与载波信号相对应，用于过滤第一射频信号中频率较高的载波信号。第二低通滤波器的截止频率低于第一低通滤波器的截止频率，且高于目标信号的最高频率，用于过滤第一射频信号中频率低于载波信号且高于目标信号的干扰信号。目标信号的最高频率为目标信号中最短低电平信号的时长的倒数，或最短高电平信号的时长的倒数。相应地，第二低通滤波器的截止频率可以为目标信号中低电平信号或高电平信号的最短时长的倒数。例如，在图3所示实施例中，第二低通滤波器的截止频率可以是第一单位信号(或第二单位信号)中最短低电平的时长的倒数的二分之一。例如，假设第一单位信号包括1ms的低电平信号和9ms的高电平信号，该截止频率可以为0.5*1/(0.001)＝500Hz。
需要说明的是，由于外界环境的干扰，第二设备接收到的第一射频信号可能与第一设备实际发送的第一射频信号存在差异。相应的，第二设备获取到的目标信号与第一设备实际发送的目标信号也可能存在差异。
S305：第二设备根据所述第一时间间隔将所述目标信号划分为至少一个信号段。
在获取到目标信号后，第二设备可以根据第一时间间隔将目标信号划分为至少一个信号段。其中，第一时间间隔为第一单位信号(或第二单位信号)的长度，即信源数据0(或信源数据1)在编码后得到的目标信号的时长。这样，根据第一时间间隔划分得到至少一个信号段中每个信号段均与第一单位信号或第二单位信号相匹配，对应信源数据0或信源数据1。这样，再对每个信号段进行解码，即可得到每个信号段对应的目标数据，从而确定目标信号对应信源数据序列。
在本申请实施例中，第二设备可以根据目标信号的长度划分信号段，也可以根据目标信号中的上升沿划分信号段。下面以前述至少一个信号段包括第一信号段为例， 对第二设备从目标信号中确定第一信号段的两种方法进行介绍。
在第一种可能的实现中，第二设备可以根据第一时间间隔和目标信号的长度从目标信号中确定第一信号段。具体的，根据前文介绍可知，第一时间间隔为信源数据0(或信源数据1)在编码后得到的信号的时长。那么，技术人员可以在确定编码方式后计算第一单位信号(或第二单位信号)的时长，得到第一时间间隔。接着，可以在第二设备中记录该第一时间间隔。这样，在获取到目标信号后，第二设备可以每隔第一时间间隔提取一次目标信号，并将提取的目标信号作为一个信号段。举例说明。假设第一时间间隔为1ms。那么第二设备在t＝0的时刻启动计时器，并记录目标信号的波形，并在t＝1ms时停止计时，将记录的目标信号的波形作为第一信号段。
在第二种可能的实现中，第二设备可以根据目标信号中的上升沿确定第一信号段。例如，第二设备可以根据目标信号在时间窗内的波形确定第一信号段。
具体地，第二设备可以先根据第一时间间隔确定第一时间窗和第二时间窗。该第一时间窗的起始点与第二时间窗的起始点之间的时间间隔即为第一时间间隔。例如，假设第一时间间隔为1ms，且第一时间窗的起始点为t＝0的时刻。那么第二设备可以将t＝1ms的时刻确定为第二时间窗的起始点。其中，第一时间窗和第二时间窗的长度小于第一时间间隔。可选地，为了提高第二设备的抗干扰能力，第一时间窗和第二时间窗的长度可以大幅度第一时间间隔，例如可以是第一时间间隔的十分之一或二十分之一。
需要说明的是，在本实施例中，第一时间窗的起始点早于第二时间窗的起始点，但是一些其他的实现方式中，第二时间窗的起始点也可以早于第一时间窗的起始点。本申请实施例并不限定第一时间窗与第二时间窗的先后关系。
在确定第一时间窗和第二时间窗后，第二设备可以将目标信号在第一时间窗内的波形记录为第一检测段，将目标信号在第二时间窗内的波形记录为第二检测段。接着，第二设备可以检测第一检测段是否包括上升沿，并检测第二检测段是否包括上升沿。
如果第一检测段包括上升沿(后称第一上升沿)，且第二检测段也包括上升沿(后称第二上升沿)，第二设备可以将目标信号在第一上升沿与第二上升沿之间的部分划分为第一信号段；如果第一检测段不包括第一上升沿，且第二检测段包括第二上升沿，第二设备可以将目标信号在第一检测段的中点到第二上升沿的之间的部分划分为第一信号段；如果第一检测段包括第一上升沿，且第二检测段不包括第二上升沿，第二设备可以将目标信号在第一上升沿到第二检测段的中点的之间的部分划分为第一信号段；如果第一检测段不包括第一上升沿，且第二检测段不包括第二上升沿，第二设备可以将目标信号在第一检测段的中点到第二检测段的中点的之间的部分划分为第一信号段。其中，第一检测段(或第二检测段)的中点是指目标信号在第一时间窗(或第二时间窗)的中间时刻的信号。
下面以图5为例进行详细介绍。在图5所示的实施例中，目标信号的波形可以是波形510、波形520或波形530中的任意一个。第一时间窗540为t＝t0时刻到t＝t1时刻之间的时间间隔，第二时间窗550为t＝t2时刻到t＝t3时刻之间的时间间隔，第三时间窗560为t＝t4时刻到t＝t5之间时刻的时间间隔。
当目标信号的波形如波形510所示时，第二设备可以在第一时间窗540对应的第一检测段中检测到第一上升沿511，在第二时间窗550对应的第二检测段中检测到第二上升沿512，在第三时间窗560对应的第三检测段中检测到第三上升沿513。相应地，第二设备可以将第一上升沿511与第二上升沿512之间的目标信号确定为第一信号段，将第二上升沿512与第三上升沿513之间的目标信号确定为第二射频信号段。
当目标信号的波形如波形520所示时，第二设备可以在第一时间窗540对应的第一检测段中检测到第一上升沿521，在第二时间窗550对应的第二检测段中没有检测到第二上升沿，在第三时间窗560对应的第三检测段中检测到第三上升沿523。相应地，第二设备可以将第一上升沿521与第二检测段的中点522之间的目标信号确定为第一信号段，将第二检测段的中点522与第三上升沿523之间的目标信号确定为第二射频信号段。
当目标信号的波形如波形530所示时，第二设备可以在第一时间窗540对应的第一检测段中没有检测到第一上升沿，在第二时间窗550对应的第二检测段中没有检测到第二上升沿，在第三时间窗560对应的第三检测段中检测到第三上升沿533。相应地，第二设备可以将第一检测段的中点531与第二检测段的中点532之间的目标信号确定为第一信号段，将第二检测段的中点532与第三上升沿533之间的目标信号确定为第二射频信号段。
可见，即使外界环境干扰较强，获取的目标信号出现了虚假的上升沿，或丢失了原有的上升沿，第二设备仍然能够以检测段的中间位置作为起点或终点划分信号段，从而确保划分出的每个信号段的长度基本与第一时间间隔一致。如此，可以避免了虚假上升沿和上升沿丢失对解码结果的影响，提高了第二设备的抗干扰能力。
另外，当第二设备为无源RFID标签时，由于无源RFID标签的电能来自无源RFID标签读写器，第二设备的时钟信号可能不稳定。那么，通过检测目标信号在时间窗内的上升沿划分信号段，可以避免因第二设备的时钟信号的抖动导致的信号段划分出错的问题。如此，屏蔽了芯片内部时钟频率的抖动或者偏移对同步的影响。而每次划分信号段均以固定的时间间隔为基础，可以消除每次划分信号段产生的累积误差。
S306：第二设备对所述至少一个信号段中每个信号段进行解码，得到第一信源数据序列。
在将目标信号划分为至少一个信号段后，第二设备可以对每个信号段进行解码，确定每个信号段对应的信源数据，再根据信号段在目标信号中的顺序将得到的信源数据进行排序，得到第一信源数据序列。例如，第二设备可以将目标信号中排在第一位的信号段对应的信源数据确定为第一信源数据序列中的第一个信源数据，将排在第二位的信号段对应的信源数据确定为第一信源数据序列中的第二个信源数据。
下面以前述至少一个信号段中的第一信号段为例，对第二设备对信号段进行解码的过程进行详细介绍。
在对第一信号段进行解码时，第二设备可以先获取第一单位信号和第二单位信号。根据前文介绍可知，第一单位信号为信源数据0经过编码后得到的信号，第二单位信 号为信源数据1经过编码后得到的信号。可选地，第二设备可以通过单位信号生成单元生成第一单位信号和第二单位信号，该单位信号生成单元可以是处理器控制软件模块，也可以是存储器、门计数器和门电路等元器件组成的实体设备。
在获取到第一单位信号和第二单位信号后，第二设备可以比较第一信号段与第一单位信号的重合程度，得到第一相似度。其中，第一相似度表示第一信号段与第一单位信号的重合程度，例如可以是第一信号段与第二单位信号相同的时长占第一信号段的总时长的比例。举例说明，假设第一信号段的时长为1ms，前0.6ms为高电平信号，后0.4ms为低电平信号，且第一单位信号的长度为1ms，前0.5ms为高电平信号，后0.5ms为低电平信号。那么，第一信号段有0.8ms与第一单位信号一致，第一相似度可以为80％。相似的，第二设备也可以比较第一信号段与第二单位信号的重合程度，得到第二相似度。
在一些可能的实现中，第二设备可以比较第一信号段与第一单位信号的相似程度，并比较第一信号段和第二单位信号的相似程度。而在一些其他的实现方式中，第二设备也而可以比较第一信号段与第一单位信号和第二单位信号中任意一个的相似程度。
在得到第一相似度和/或第二相似度后，第二设备可以根据第一相似度和/或第二相似度确定第一信号段对应的第一信源数据。例如，假设第二设备确定了第一相似度和第二相似度，第二设备可以比较第一相似度与第二相似度的大小。如果第一相似度大于第二相似度，说明第一信号段与第一单位信号的重合程度高于第一信号段与第二单位信号的重合程度，第二设备可以确定第一信号段对应的信源数据为信源数据0；如果第一相似度大于第二相似度，说明第一信号段与第一单位信号的重合程度低于第一信号段与第二单位信号的重合程度，第二设备可以确定第一信号段对应的信源数据为信源数据1。
在本申请实施中，第二设备可以通过处理器确定第一信号段对应的信源数据，也可以通过门电路或比较器等较为简单的数字电路元器件确定第一信号段对应的信源数据。例如，第一设备可以将第一信号段和第一单位信号分别输入异或门的两个输入段，再将异或门的输出端连接到加法器。这样，当第一信号段与第一单位信号一致时，异或门输出高电平到加法器，加法器的计数值加1。这样，每当第一信号段与第一单位信号相同时，加法器中累加的数值都会增加。可见，加法器中记录的数值能够可体现第一信号段与第一单位信号的重合程度，即第一相似度。同样，第二设备还可以通过类似的方式得到第二相似度。
而在比较第一相似度和/或第二相似度时，第二设备可以将代表第一相似度和第二相似度的两个加法器的输出作为比较器的输入，从而通过比较器判断两个加法器的输出的大小，即比较第一相似度和第二相似度的大小。这样，通过加法器、异或门和比较器等结构较为简单的元器件对目标信号进行解码，降低了第二设备的复杂度，具有低复杂度、低面积、低功耗特点。如此，当第二设备为无源RFID标签时，可以节省第二设备从第一设备获取的电能。
当然，在一些其他的实现方式中，第二设备也可以比较第一相似度(或第二相似 度)与预设阈值的大小。如果第一相似度大于预设阈值，说明第一信号段与第一单位信号的重合程度较高，第二设备可以确定第一信号段对应的信源数据为信源数据0；如果第二相似度大于预设阈值，说明第一信号段与第二单位信号的重合程度较高，第二设备可以确定第一信号段对应的信源数据为信源数据1。可选地，为了确保结果的准确性，所述预设阈值可以为50％。
可见，在本申请实施例提供的方案中，第二设备可以将信号段的波形与标准波形(即第一单位信号的波形或第二单位信号的波形)相比较，并通过信号段与作为标准的第一单位信号或第二单位信号的重合程度确定信号段对应的信源数据。这样，即使由于外界干扰导致信号段的波形与第一单位信号或第二单位信号之间存在差异，通过重合程度仍然可以确定信号段是第一单位信号经过干扰后产生的，还是第二单位信号经过干扰后产生的。如此，可以确保解码得到的信源数据的准确性。
在确定至少一个信号段中每个信号段对应的信源数据后，第二设备可以根据信号段在目标信号中的顺序确定各个信源数据在信源数据中的顺序，从而得到第一信源数据序列。
在本申请实施例提供的方法中，发送信源数据序列的第一设备可以将信源数据0和信源数据1分别编码为时长相同的第一单位信号和第二单位信号，并向第二设备发送编码后的信源数据序列。相应地，在接收到第一设备发送的目标信号后，第二设备可以根据第一单位信号(或第二单位信号)的时长将目标信号划分为至少一个时长相近的信号段。这样，通过确保信源数据0和信源数据1编码后的时长相同，使得解码过程中可以根据时间划分信号段。也就不需要根据上升沿划分信号段，从而减少了虚假上升沿和上升沿丢失对解码结果的影响。如此，通过调整编码规则和解码规则，降低了外界干扰对无线信号传输的影响，提升了抗干扰能力。从图6中可以看出，在保证相同的误码率(1％)的基础上，采用本申请实施例提供的方法的RFID系统可以比传统的RFID系统(型号为AZ-9654)提升13分贝(decibel，dB)的干扰。其中，图6的横轴表示信噪比，纵轴表示误码率，不同的曲线表示不同的编码方法。
可选地，在一些可能的实现方式中，第二设备为包括RFID标签的终端设备。那么，第二设备获取的第一信源数据序列可以用于控制第二设备其他功能模块的工作状态。例如，假设第二设备为低功耗物联网终端设备，包括电源、无源RFID标签、存储器和至少一个功能模块。那么，技术人员可以在存储器中预先存储目标信源数据序列。在未接收到目标信源数据序列的情况下，第二设备可以控制无源RFID标签处于工作状态，并控制该至少一个功能模块处于休眠状态，即控制电源不给该至少一个功能模块供电，从而节省电源中存储的电能。在通过无源RFID标签接收到第一设备发送的第一信源数据序列后，第二设备可以比较第一信源数据序列与目标信源数据序列是否匹配。若匹配，第二设备可以控制该至少一个功能模块处于工作状态，即控制电源为该至少一个功能模块供电。如此，可以节省第二设备中存储的电能，从而延长第二设备的工作时间。
参见图7，本申请实施例还提供了一种数据发送装置700，该数据发送装置700可 以实现图3所示实施例中第一设备的功能。该数据发送装置700包括获取单元701、处理单元702和发送单元703。其中，获取单元701用于实现图3所示实施例中的S301，处理单元702用于实现图3所示实施例中的S302，发送单元703用于实现图3所示实施例中的S303。
具体的，获取单元701，用于获取待发送的信源数据序列，所述信源数据序列包括至少一个信源数据0，和/或，至少一个信源数据1。
处理单元702，用于对所述信源数据序列进行编码，得到目标信号，其中，所述目标信号包括至少一个第一单位信号，和/或，至少一个第二单位信号，所述第一单位信号是对所述信源数据0进行编码得到的，所述第二单位信号是对所述信源数据1进行编码得到的，所述第一单位信号和所述第二单位信号的时长相同。
发送单元703，用于向第二设备发送所述目标信号。
具体执行过程请参考上述图3所示实施例中相应步骤的详细描述，这里不再一一赘述。
参见图8，本申请实施例还提供了一种信号处理装置800，该信号处理装置800可以实现图3所示实施例中第二设备的功能。该信号处理装置800包括获取单元801和处理单元802。其中，获取单元801用于实现图3所示实施例中的S304，处理单元802用于实现图3所示实施例中的S305和S306。
具体的，获取单元801，用于获取来自第一设备的目标信号；所述目标信号为对信源数据序列编码得到的信号，所述信源数据序列包括至少一个信源数据0，和/或，至少一个信源数据1，所述目标信号包括至少一个第一单位信号，和/或，至少一个第二单位信号，所述第一单位信号是对所述信源数据0进行编码得到的，所述第二单位信号是对所述信源数据1进行编码得到的，所述第一单位信号的时长和所述第二单位信号的时长均为第一时间间隔。
处理单元802，用于根据所述第一时间间隔将所述目标信号划分为至少一个信号段；对所述至少一个信号段中每个信号段进行解码，得到第一信源数据序列。
具体执行过程请参考上述图3所示实施例中相应步骤的详细描述，这里不再一一赘述。
需要说明的是，本申请实施例中对单元的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。本申请实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。例如，上述实施例中，获取单元和处理单元可以是同一个单元，也不同的单元。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
图9是本申请实施例提供的一种设备900的结构示意图。上文中的装置700可以通过图9所示的设备来实现。参见图9，该设备900包括至少一个处理器901，通信总线902以及至少一个网络接口904，可选地，该设备900还可以包括存储器903。
处理器901可以是一个通用中央处理器(central processing unit，CPU)、特定应用 集成电路(application-specific integrated circuit，ASIC)或一个或多个用于控制本申请方案程序执行的集成电路(integrated circuit，IC)。处理器可以用于对配置文件进行处理，以实现本申请实施例中提供的数据发送方法。
比如，当图3中的第一设备通过图9所示的设备900来实现时，该处理器901可以用于：获取待发送的信源数据序列，所述信源数据序列包括至少一个信源数据0，和/或，至少一个信源数据1，对所述信源数据序列进行编码，得到目标信号，其中，所述目标信号包括至少一个第一单位信号，和/或，至少一个第二单位信号，所述第一单位信号是对所述信源数据0进行编码得到的，所述第二单位信号是对所述信源数据1进行编码得到的，所述第一单位信号和所述第二单位信号的时长相同；向第二设备发送所述目标信号。
通信总线902用于在处理器901、网络接口904和存储器903之间传送信息。
存储器903可以是只读存储器(read-only memory，ROM)或可存储静态信息和指令的其它类型的静态存储设备，存储器903还可以是随机存取存储器(random access memory，RAM)或者可存储信息和指令的其它类型的动态存储设备，也可以是只读光盘(compact disc read-only Memory，CD-ROM)或其它光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或者其它磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其它介质，但不限于此。存储器903可以是独立存在，通过通信总线902与处理器901相连接。存储器903也可以和处理器901集成在一起。
可选地，存储器903用于存储执行本申请方案的程序代码或指令，并由处理器901来控制执行。处理器901用于执行存储器903中存储的程序代码或指令。程序代码中可以包括一个或多个软件模块。可选地，处理器901也可以存储执行本申请方案的程序代码或指令，在这种情况下处理器901不需要到存储器903中读取程序代码或指令。
网络接口904可以为收发器一类的装置，用于与其它设备或通信网络通信，通信网络可以为以太网、无线接入网(RAN)或无线局域网(wireless local area networks，WLAN)等。在本申请实施例中，网络接口904可以用于接收分段路由网络中的其他节点发送的报文，也可以向分段路由网络中的其他节点发送报文。网络接口904可以为以太接口(ethernet)接口、快速以太(fast ethernet，FE)接口或千兆以太(gigabit ethernet，GE)接口等。
在具体实现中，作为一种实施例，设备900可以包括多个处理器，例如图9中所示的处理器901和处理器905。这些处理器中的每一个可以是一个单核(single-CPU)处理器，也可以是一个多核(multi-CPU)处理器。这里的处理器可以指一个或多个设备、电路、和/或用于处理数据(例如计算机程序指令)的处理核。
图10是本申请实施例提供的一种设备1000的结构示意图。上文中的装置800可以通过图10所示的设备来实现。参见图10，该设备1000包括至少一个处理器1001，通信总线1002以及至少一个网络接口1004，可选地，该设备1000还可以包括存储器1003。
处理器1001可以是一个通用中央处理器(central processing unit，CPU)、特定应用集成电路(application-specific integrated circuit，ASIC)或一个或多个用于控制本申请方案程序执行的集成电路(integrated circuit，IC)。处理器可以用于对配置文件进行处理，以实现本申请实施例中提供的信号处理方法。
比如，当图3中的第二设备通过图10所示的设备1000来实现时，该处理器1001可以用于：获取来自第一设备的目标信号；所述目标信号为对信源数据序列编码得到的信号，所述信源数据序列包括至少一个信源数据0，和/或，至少一个信源数据1，所述目标信号包括至少一个第一单位信号，和/或，至少一个第二单位信号，所述第一单位信号是对所述信源数据0进行编码得到的，所述第二单位信号是对所述信源数据1进行编码得到的，所述第一单位信号的时长和所述第二单位信号的时长均为第一时间间隔，根据所述第一时间间隔将所述目标信号划分为至少一个信号段，对所述至少一个信号段中每个信号段进行解码，得到第一信源数据序列。
通信总线1002用于在处理器1001、网络接口1004和存储器1003之间传送信息。
存储器1003可以是只读存储器(read-only memory，ROM)或可存储静态信息和指令的其它类型的静态存储设备，存储器1003还可以是随机存取存储器(random access memory，RAM)或者可存储信息和指令的其它类型的动态存储设备，也可以是只读光盘(compact disc read-only Memory，CD-ROM)或其它光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或者其它磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其它介质，但不限于此。存储器1003可以是独立存在，通过通信总线1002与处理器1001相连接。存储器1003也可以和处理器1001集成在一起。
可选地，存储器1003用于存储执行本申请方案的程序代码或指令，并由处理器1001来控制执行。处理器1001用于执行存储器1003中存储的程序代码或指令。程序代码中可以包括一个或多个软件模块。可选地，处理器1001也可以存储执行本申请方案的程序代码或指令，在这种情况下处理器1001不需要到存储器1003中读取程序代码或指令。
网络接口1004可以为收发器一类的装置，用于与其它设备或通信网络通信，通信网络可以为以太网、无线接入网(RAN)或无线局域网(wireless local area networks，WLAN)等。在本申请实施例中，网络接口1004可以用于接收分段路由网络中的其他节点发送的报文，也可以向分段路由网络中的其他节点发送报文。网络接口1004可以为以太接口(ethernet)接口、快速以太(fast ethernet，FE)接口或千兆以太(gigabit ethernet，GE)接口等。
在具体实现中，作为一种实施例，设备1000可以包括多个处理器，例如图10中所示的处理器1001和处理器1005。这些处理器中的每一个可以是一个单核(single-CPU)处理器，也可以是一个多核(multi-CPU)处理器。这里的处理器可以指一个或多个设备、电路、和/或用于处理数据(例如计算机程序指令)的处理核。
图11是本申请实施例提供的一种设备1100的结构示意图。图3中的第一设备可 以通过图11所示的设备来实现。参见图11所示的设备结构示意图，设备1100包括主控板和一个或多个接口板。主控板与接口板通信连接。主控板也称为主处理单元(main processing unit，MPU)或路由处理卡(route processor card)，主控板包括CPU和存储器，主控板负责对设备1100中各个组件的控制和管理，包括路由计算、设备管理和维护功能。接口板也称为线处理单元(line processing unit，LPU)或线卡(line card)，用于接收和发送报文。在一些实施例中，主控板与接口板之间或接口板与接口板之间通过总线通信。在一些实施例中，接口板之间通过交换网板通信，在这种情况下设备1100也包括交换网板，交换网板与主控板、接口板通信连接，交换网板用于转发接口板之间的数据，交换网板也可以称为交换网板单元(switch fabric unit，SFU)。接口板包括CPU、存储器、转发引擎和接口卡(interface card，IC)，其中接口卡可以包括一个或多个网络接口。网络接口可以为Ethernet接口、FE接口或GE接口等。CPU与存储器、转发引擎和接口卡分别通信连接。存储器用于存储转发表。转发引擎用于基于存储器中保存的转发表转发接收到的报文，如果接收到的报文的目的地址为设备1100的IP地址，则将该报文发送给主控板或接口板的CPU进行处理；如果接收到的报文的目的地址不是设备1100的IP地址，则根据该目的地查转发表，如果从转发表中查找到该目的地址对应的下一跳和出接口，将该报文转发到该目的地址对应的出接口。转发引擎可以是网络处理器(network processor，NP)。接口卡也称为子卡，可安装在接口板上，负责将光电信号转换为数据帧，并对数据帧进行合法性检查后转发给转发引擎处理或接口板CPU。在一些实施例中，CPU也可执行转发引擎的功能，比如基于通用CPU实现软转发，从而接口板中不需要转发引擎。在一些实施例中，转发引擎可以通过ASIC或现场可编程门阵列(field programmable gate array，FPGA)实现。在一些实施例中，存储转发表的存储器也可以集成到转发引擎中，作为转发引擎的一部分。
可选地，该芯片系统中的处理器可以为一个或多个。该处理器可以通过硬件实现也可以通过软件实现。当通过硬件实现时，该处理器可以是逻辑电路、集成电路等。当通过软件实现时，该处理器可以是一个通用处理器，通过读取存储器中存储的软件代码来实现。
可选地，该芯片系统中的存储器也可以为一个或多个。该存储器可以与处理器集成在一起，也可以和处理器分离设置，本申请并不限定。示例性的，存储器可以是非瞬时性处理器，例如只读存储器ROM，其可以与处理器集成在同一块芯片上，也可以分别设置在不同的芯片上，本申请对存储器的类型，以及存储器与处理器的设置方式不作具体限定。
示例性的，该芯片系统可以是FPGA，可以是ASIC，还可以是系统芯片(system on chip，SoC)，还可以是CPU，还可以是NP，还可以是数字信号处理电路(digital signal processor，DSP)，还可以是微控制器(micro controller unit，MCU)，还可以是可编程控制器(programmable logic device，PLD)或其他集成芯片。
应理解，上述方法实施例中第一设备的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。结合本申请实施例所公开的方法步骤可以直接体现 为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。
图12是本申请实施例提供的一种设备1200的结构示意图。图3中的第二设备可以通过图12所示的设备来实现。参见图12所示的设备结构示意图，设备1200包括主控板和一个或多个接口板。主控板与接口板通信连接。主控板也称为主处理单元(main processing unit，MPU)或路由处理卡(route processor card)，主控板包括CPU和存储器，主控板负责对设备1200中各个组件的控制和管理，包括路由计算、设备管理和维护功能。接口板也称为线处理单元(line processing unit，LPU)或线卡(line card)，用于接收和发送报文。在一些实施例中，主控板与接口板之间或接口板与接口板之间通过总线通信。在一些实施例中，接口板之间通过交换网板通信，在这种情况下设备1200也包括交换网板，交换网板与主控板、接口板通信连接，交换网板用于转发接口板之间的数据，交换网板也可以称为交换网板单元(switch fabric unit，SFU)。接口板包括CPU、存储器、转发引擎和接口卡(interface card，IC)，其中接口卡可以包括一个或多个网络接口。网络接口可以为Ethernet接口、FE接口或GE接口等。CPU与存储器、转发引擎和接口卡分别通信连接。存储器用于存储转发表。转发引擎用于基于存储器中保存的转发表转发接收到的报文，如果接收到的报文的目的地址为设备1200的IP地址，则将该报文发送给主控板或接口板的CPU进行处理；如果接收到的报文的目的地址不是设备1200的IP地址，则根据该目的地查转发表，如果从转发表中查找到该目的地址对应的下一跳和出接口，将该报文转发到该目的地址对应的出接口。转发引擎可以是网络处理器(network processor，NP)。接口卡也称为子卡，可安装在接口板上，负责将光电信号转换为数据帧，并对数据帧进行合法性检查后转发给转发引擎处理或接口板CPU。在一些实施例中，CPU也可执行转发引擎的功能，比如基于通用CPU实现软转发，从而接口板中不需要转发引擎。在一些实施例中，转发引擎可以通过ASIC或现场可编程门阵列(field programmable gate array，FPGA)实现。在一些实施例中，存储转发表的存储器也可以集成到转发引擎中，作为转发引擎的一部分。
可选地，该芯片系统中的处理器可以为一个或多个。该处理器可以通过硬件实现也可以通过软件实现。当通过硬件实现时，该处理器可以是逻辑电路、集成电路等。当通过软件实现时，该处理器可以是一个通用处理器，通过读取存储器中存储的软件代码来实现。
可选地，该芯片系统中的存储器也可以为一个或多个。该存储器可以与处理器集成在一起，也可以和处理器分离设置，本申请并不限定。示例性的，存储器可以是非瞬时性处理器，例如只读存储器ROM，其可以与处理器集成在同一块芯片上，也可以分别设置在不同的芯片上，本申请对存储器的类型，以及存储器与处理器的设置方式不作具体限定。
示例性的，该芯片系统可以是FPGA，可以是ASIC，还可以是系统芯片(system on chip，SoC)，还可以是CPU，还可以是NP，还可以是数字信号处理电路(digital signal processor，DSP)，还可以是微控制器(micro controller unit，MCU)，还可以是可编程控制器(programmable logic device，PLD)或其他集成芯片。
应理解，上述方法实施例中第二设备的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。结合本申请实施例所公开的方法步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。
本申请实施例还提供了一种计算机可读存储介质，包括指令，当其在计算机上运行时，使得计算机执行以上方法实施例提供的、由第一设备执行的数据发送方法，或，使得计算机执行以上方法实施例提供的、由第二设备执行的信号处理方法。
本申请实施例还提供了一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行以上方法实施例提供的、由第一设备执行的数据发送方法，或，使得计算机执行以上方法实施例提供的、由第二设备执行的信号处理方法。
本申请的说明书和权利要求书及上述附图中的术语“第一”、“第二”、“第三”、“第四”等(如果存在)是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换，以便这里描述的实施例能够以除了在这里图示或描述的内容以外的顺序实施。此外，术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统，装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统，装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑模块划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要获取其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各模块单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件模块单元的形式实现。
所述集成的单元如果以软件模块单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储 器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。
本领域技术人员应该可以意识到，在上述一个或多个示例中，本发明所描述的功能可以用硬件、软件、固件或它们的任意组合来实现。当使用软件实现时，可以将这些功能存储在计算机可读介质中或者作为计算机可读介质上的一个或多个指令或代码进行传输。计算机可读介质包括计算机存储介质和通信介质，其中通信介质包括便于从一个地方向另一个地方传送计算机程序的任何介质。存储介质可以是通用或专用计算机能够存取的任何可用介质。
以上所述的具体实施方式，对本发明的目的、技术方案和有益效果进行了进一步详细说明，所应理解的是，以上所述仅为本发明的具体实施方式而已。
以上所述，以上实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围。

Claims (44)

  1. 一种数据发送方法，其特征在于，所述方法包括：
    第一设备获取待发送的信源数据序列，所述信源数据序列包括至少一个信源数据0，和/或，至少一个信源数据1；
    所述第一设备对所述信源数据序列进行编码，得到目标信号，其中，所述目标信号包括至少一个第一单位信号，和/或，至少一个第二单位信号，所述第一单位信号是对所述信源数据0进行编码得到的，所述第二单位信号是对所述信源数据1进行编码得到的，所述第一单位信号和所述第二单位信号的时长相同；
    所述第一设备向第二设备发送所述目标信号。
  2. 根据权利要求1所述的方法，其特征在于，所述第一设备对所述信源数据序列进行编码得到目标信号包括：
    所述第一设备对所述信源数据序列进行预编码，得到中间数据序列，其中，所述信源数据序列中的每个信源数据分别被预编码为m个中间数据0和n个中间数据1，所述m和n均为大于或等于1的整数；
    所述第一设备对所述中间数据序列进行二次编码，得到目标信号。
  3. 根据权利要求2所述的方法，其特征在于，所述第一设备对所述中间数据序列进行二次编码，得到目标信号包括：
    所述第一设备对所述中间数据序列进行脉冲宽度编码PIE，得到目标信号。
  4. 根据权利要求1至3任一项所述的方法，其特征在于，所述第一设备包括射频识别RFID标签阅读器，所述第二设备包括RFID标签。
  5. 根据权利要求4所述的方法，其特征在于，所述第一设备为包括用于发送所述目标信号的所述RFID标签阅读器的基站，所述第二设备为包括用于接收所述目标信号的所述RFID标签的终端设备，所述信源数据序列用于启动所述第二设备。
  6. 一种信号处理方法，其特征在于，所述方法包括：
    第二设备获取来自第一设备的目标信号；所述目标信号为对信源数据序列编码得到的信号，所述信源数据序列包括至少一个信源数据0，和/或，至少一个信源数据1，所述目标信号包括至少一个第一单位信号，和/或，至少一个第二单位信号，所述第一单位信号是对所述信源数据0进行编码得到的，所述第二单位信号是对所述信源数据1进行编码得到的，所述第一单位信号的时长和所述第二单位信号的时长均为第一时间间隔；
    所述第二设备根据所述第一时间间隔将所述目标信号划分为至少一个信号段；
    所述第二设备对所述至少一个信号段中每个信号段进行解码，得到第一信源数据序列。
  7. 根据权利要求6所述的方法，其特征在于，所述至少一个信号段包括第一信号段，所述第二设备根据所述第一时间间隔将所述目标信号划分为至少一个信号段包括：
    所述第二设备根据所述第一时间间隔从所述目标信号中确定与第一时间窗对应的第一检测段和与第二时间窗对应的第二检测段，所述第一时间窗的起始点与所述第二时间窗的起始点之间的间隔为所述预设时间间隔；
    所述第二设备根据所述第一检测段的波形和所述第二检测段的波形将所述目标信号划 分为所述第一信号段。
  8. 根据权利要求7所述的方法，其特征在于，所述第一时间窗的时长小于所述第一时间间隔，所述第二时间窗的时长小于所述第一时间间隔。
  9. 根据权利要求7或8所述的方法，其特征在于，所述第二设备根据所述第一检测段的波形和所述第二检测段的波形将所述目标信号划分为所述第一信号段包括：
    响应于所述第一检测段的波形包括第一上升沿，且所述第二检测段的波形包括第二上升沿，所述第二设备将所述第一上升沿与所述第二上升沿之间的目标信号确定为第一信号段。
  10. 根据权利要求7或8所述的方法，其特征在于，所述第二设备根据所述第一检测段的波形和所述第二检测段的波形将所述目标信号划分为所述第一信号段包括：
    响应于所述第一检测段的波形包括第一上升沿，且所述第二检测段的波形不包括第二上升沿，所述第二设备将所述第一上升沿与所述第二检测段的波形的中点之间的目标信号确定为第一信号段。
  11. 根据权利要求7或8所述的方法，其特征在于，所述第二设备根据所述第一检测段的波形和所述第二检测段的波形将所述目标信号划分为所述第一信号段包括：
    响应于所述第一检测段的波形不包括第一上升沿，且所述第二检测段的波形不包括第二上升沿，所述第二设备将所述第一检测段的波形的中点与所述第二检测段的波形的中点之间的目标信号确定为第一信号段。
  12. 根据权利要求6至11任一项所述的方法，其特征在于，所述至少一个信号段包括第一信号段，所述第二设备对所述至少一个信号段中每个信号段进行解码得到第一信源数据序列包括：
    所述第二设备比较所述第一信号段与第一单位信号的相似程度，得到第一相似度，和/或，比较所述第一信号段与第二单位信号的相似程度，得到第二相似度；
    所述第二设备根据所述第一相似度和/或所述第二相似度，确定所述第一信号段对应的第一信源数据。
  13. 根据权利要求12所述的方法，其特征在于，所述第二设备根据所述第一相似度和/或所述第二相似度，确定所述第一信号段对应的第一信源数据包括：
    所述第二设备比较所述第一相似度与所述第二相似度的大小；
    响应于所述第一相似度大于所述第二相似度，所述第二设备确定所述第一信号段对应的信源数据为信源数据0；
    响应于所述第一相似度小于所述第二相似度，所述第二设备确定所述第一信号段对应的信源数据为信源数据1。
  14. 根据权利要求6至13任一项所述的方法，其特征在于，所述第二设备获取目标信号包括：
    所述第二设备接收所述第一设备发送的第一射频信号；
    所述第二设备对所述第一射频信号进行滤波得到第二射频信号；
    所述第二设备对所述第二射频信号进行模数转换，得到所述目标信号。
  15. 根据权利要求14所述的方法，其特征在于，所述第二设备对所述第一射频信号进行滤波得到第二射频信号包括：
    所述第二设备通过第一低通滤波器对所述第一射频信号进行滤波，得到中间信号；
    所述第二设备通过第二低通滤波器对所述中间信号进行滤波，得到第二射频信号；
    其中，所述第一低通滤波器的截止频率高于所述第二低通滤波器的截止频率。
  16. 根据权利要求15所述的方法，其特征在于，所述第二低通滤波器的截止频率为所述目标信号中低电平或高电平的最短时长的倒数。
  17. 根据权利要求6至16任一项所述的方法，其特征在于，所述第一设备包括射频识别RFID标签阅读器，所述第二设备包括RFID标签。
  18. 根据权利要求17所述的方法，其特征在于，所述第一设备为包括用于发送所述目标信号的所述RFID标签阅读器的基站，所述第二设备为包括用于接收所述目标信号的RFID标签的终端设备。
  19. 根据权利要求18所述的方法，其特征在于，在得到所述第一信源数据序列之后，所述方法还包括：
    所述第二设备比较所述第一信源数据序列与预先存储的目标信源数据序列是否匹配，若匹配，则控制所述终端设备从休眠状态进入工作状态。
  20. 一种数据发送装置，其特征在于，所述装置位于第一设备，包括：
    获取单元，用于获取待发送的信源数据序列，所述信源数据序列包括至少一个信源数据0，和/或，至少一个信源数据1；
    处理单元，用于对所述信源数据序列进行编码，得到目标信号，其中，所述目标信号包括至少一个第一单位信号，和/或，至少一个第二单位信号，所述第一单位信号是对所述信源数据0进行编码得到的，所述第二单位信号是对所述信源数据1进行编码得到的，所述第一单位信号和所述第二单位信号的时长相同；
    发送单元，用于向第二设备发送所述目标信号。
  21. 根据权利要求20所述的装置，其特征在于，
    所述处理单元，用于对所述信源数据序列进行预编码，得到中间数据序列，其中，所述信源数据序列中的每个信源数据分别被预编码为m个中间数据0和n个中间数据1，所述m和n均为大于或等于1的整数；对所述中间数据序列进行二次编码，得到目标信号。
  22. 根据权利要求21所述的装置，其特征在于，
    所述处理单元，用于对所述中间数据序列进行脉冲宽度编码PIE，得到目标信号。
  23. 根据权利要求20至21任一项所述的装置，其特征在于，所述第一设备包括射频识别RFID标签阅读器，所述第二设备包括RFID标签。
  24. 根据权利要求23所述的装置，其特征在于，所述第一设备为包括用于发送所述目标信号的所述RFID标签阅读器的基站，所述第二设备为包括用于接收所述目标信号的所述RFID标签的终端设备，所述信源数据序列用于启动所述第二设备。
  25. 一种信号处理装置，其特征在于，所述装置位于第二设备，包括：
    获取单元，用于获取来自第一设备的目标信号；所述目标信号为对信源数据序列编码 得到的信号，所述信源数据序列包括至少一个信源数据0，和/或，至少一个信源数据1，所述目标信号包括至少一个第一单位信号，和/或，至少一个第二单位信号，所述第一单位信号是对所述信源数据0进行编码得到的，所述第二单位信号是对所述信源数据1进行编码得到的，所述第一单位信号的时长和所述第二单位信号的时长均为第一时间间隔；
    处理单元，用于根据所述第一时间间隔将所述目标信号划分为至少一个信号段；对所述至少一个信号段中每个信号段进行解码，得到第一信源数据序列。
  26. 根据权利要求25所述的装置，其特征在于，
    所述处理单元，用于根据所述第一时间间隔从所述目标信号中确定与第一时间窗对应的第一检测段和与第二时间窗对应的第二检测段，所述第一时间窗的起始点与所述第二时间窗的起始点之间的间隔为所述预设时间间隔；根据所述第一检测段的波形和所述第二检测段的波形将所述目标信号划分为所述第一信号段。
  27. 根据权利要求26所述的装置，其特征在于，所述第一时间窗的时长小于所述第一时间间隔，所述第二时间戳的时长小于所述第一时间间隔。
  28. 根据权利要求26或27所述的装置，其特征在于，
    所述处理单元，用于响应于所述第一检测段的波形包括第一上升沿，且所述第二检测段的波形包括第二上升沿，将所述第一上升沿与所述第二上升沿之间的目标信号确定为第一信号段。
  29. 根据权利要求26或27所述的装置，其特征在于，
    所述处理单元，用于响应于所述第一检测段的波形包括第一上升沿，且所述第二检测段的波形不包括第二上升沿，将所述第一上升沿与所述第二检测段的波形的中点之间的目标信号确定为第一信号段。
  30. 根据权利要求26或27所述的装置，其特征在于，
    所述处理单元，用于响应于所述第一检测段的波形不包括第一上升沿，且所述第二检测段的波形不包括第二上升沿，将所述第一检测段的波形的中点与所述第二检测段的波形的中点之间的目标信号确定为第一信号段。
  31. 根据权利要求25至30任一项所述的装置，其特征在于，所述至少一个信号段包括第一信号段；
    所述处理单元，用于比较所述第一信号段与第一单位信号的相似程度，得到第一相似度，和/或，比较所述第一信号段与第二单位信号的相似程度，得到第二相似度；根据所述第一相似度和/或所述第二相似度，确定所述第一信号段对应的第一信源数据。
  32. 根据权利要求31所述的装置，其特征在于，
    所述处理单元，用于比较所述第一相似度与所述第二相似度的大小；响应于所述第一相似度大于所述第二相似度，确定所述第一信号段对应的信源数据为信源数据0；响应于所述第一相似度小于所述第二相似度，确定所述第一信号段对应的信源数据为信源数据1。
  33. 根据权利要求32所述的装置，其特征在于，所述处理单元包括第一异或门、第二异或门、第一加法器、第二加法器和一个比较器；
    所述第一异或门，用于比较所述第一信号段与所述第一单位信号的相似程度；
    所述第二异或门，用于比较所述第一信号段与所述第二单位信号的相似程度；
    所述第一加法器，用于记录所述第一相似度；
    所述第二加法器，用于记录所述第二相似度；
    所述比较器，用于比较所述第一相似度与所述第二相似度的大小。
  34. 根据权利要求25至32任一项所述的装置，其特征在于，
    所述接收单元，用于接收所述第一设备发送的第一射频信号；对所述第一射频信号进行滤波得到第二射频信号；对所述第二射频信号进行模数转换，得到所述目标信号。
  35. 根据权利要求34所述的装置，其特征在于，
    所述处理单元，用于通过第一低通滤波器对所述第一射频信号进行滤波，得到中间信号；通过第二低通滤波器对所述中间信号进行滤波，得到第二射频信号；其中，所述第一低通滤波器的截止频率高于所述第二低通滤波器的截止频率。
  36. 根据权利要求35所述的装置，其特征在于，所述第二低通滤波器的截止频率为所述目标信号中低电平或高电平的最短时长的倒数。
  37. 根据权利要求25至36任一项所述的装置，其特征在于，所述第一设备包括射频识别RFID标签阅读器，所述第二设备包括RFID标签。
  38. 根据权利要求37所述的装置，其特征在于，所述第一设备为包括用于发送所述目标信号的所述RFID标签阅读器的基站，所述第二设备为用于接收所述目标信号的包括RFID标签的终端设备。
  39. 根据权利要求38所述的装置，其特征在于，
    所述处理单元，还用于比较所述第一信源数据序列与预先存储的目标信源数据序列是否匹配，若匹配，则控制所述终端设备进入工作状态。
  40. 一种设备，其特征在于，所述设备包括：至少一个处理器，所述至少一个处理器与至少一个存储器耦合；
    所述至少一个处理器，用于执行所述至少一个存储器中存储的计算机程序或指令，使得所述设备执行所述权利要求1-5任一项所述的数据发送方法。
  41. 根据权利要求40所述的设备，其特征在于，所述设备为包括射频识别RFID标签阅读器的基站。
  42. 一种设备，其特征在于，所述设备包括：至少一个处理器，所述至少一个处理器与至少一个存储器耦合；
    所述至少一个处理器，用于执行所述至少一个存储器中存储的计算机程序或指令，使得所述设备执行所述权利要求6-19任一项所述的信号处理方法。
  43. 根据权利要求42所述的设备，其特征在于，所述设备为包括射频识别RFID标签的终端设备。
  44. 一种计算机可读存储介质，其特征在于，包括指令、程序或代码，当所述指令、程序或代码在计算机上执行时，使得所述计算机执行如权利要求1-5任一所述的数据发送方法，或使得所述计算机执行如权利要求6-19任一所述的信号处理方法。
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