CN114614911B - Pulse modulation and demodulation communication method, system, equipment and storage medium - Google Patents
Pulse modulation and demodulation communication method, system, equipment and storage medium Download PDFInfo
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- H04B14/00—Transmission systems not characterised by the medium used for transmission
- H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
- H04B14/023—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using pulse amplitude modulation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B14/00—Transmission systems not characterised by the medium used for transmission
- H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
- H04B14/04—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using pulse code modulation
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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Abstract
The invention discloses a pulse modulation and demodulation communication method, a system, equipment and a storage medium, and belongs to the technical field of communication. According to the invention, after the jump information of the signal to be modulated is obtained through the signal transmitting end, the signal to be modulated is modulated into the polar pulse signal according to the jump information, the signal to be modulated is modulated into the polar pulse signal by utilizing the characteristic that the total times of the 0 to 1 jump and the 1 to 0 jump are similar in the signal to be modulated, the generation of direct current components is reduced, the modulated polar pulse signal is transmitted to the signal receiving end, the signal transmission capacity is improved, and the effectiveness of signal transmission is increased. When the signal receiving end monitors the polar pulse signal, the polar pulse signal is matched with a preset detection voltage, a judgment reference is provided for polar pulse signal demodulation, so that the polar pulse signal is demodulated based on a matching result, a demodulated signal is obtained, the signal state is accurately recovered, the signal recovery capability is ensured, and the effectiveness of signal transmission is improved.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method, a system, an apparatus, and a storage medium for pulse modulation and demodulation communications.
Background
The modulation methods used in the pulse modulation and demodulation communication technology mainly include pulse amplitude modulation (PAM, pulse Amplitude Modulation), pulse width modulation (PWM, pulse Width Modulation), pulse position modulation (PPM, pulse Position Modulation), and the like. The pulse amplitude modulation is a modulation mode that the amplitude of a pulse carrier wave changes along with a baseband signal, and in digital communication, 0 and 1 are respectively represented by different pulse amplitudes; pulse width modulation is a pulse modulation mode in which the pulse duration (pulse width) of a pulse carrier varies with the variation of the pulse width of a modulated wave, and in digital communication, 0 and 1 are respectively represented by pulses of different widths; the pulse position modulation is a modulation signal that controls the relative position (i.e., phase) of each pulse in a pulse train so that the relative position of each pulse varies with the modulation signal. However, in the above-mentioned modulation method, the polarities of the two pulse amplitudes in the pulse amplitude modulation are the same, and the modulated signal contains a direct current component; the pulse amplitude and the pulse width in the pulse position modulation time sequence are unchanged, and the modulated signal also contains a direct current component. In the signal transmission process, if the direct current component exists, the direct long-distance transmission is not facilitated, and how to reduce the direct current component of the modulated signal to improve the effectiveness of the signal transmission becomes a problem to be solved.
Disclosure of Invention
The invention mainly aims to provide a pulse modulation and demodulation communication method, a system, equipment and a storage medium, which aim to solve the technical problem of improving the effectiveness of signal transmission.
In order to achieve the above object, the present invention provides a pulse modulation and demodulation communication method, which is applied to a signal transmitting end, and the pulse modulation and demodulation communication method includes the following steps:
acquiring jump information of a signal to be modulated;
modulating the signal to be modulated into a polar pulse signal according to the jump information, and sending the polar pulse signal to a signal receiving end.
Optionally, the step of modulating the signal to be modulated into a polar pulse signal according to the jump information of the signal to be modulated includes:
detecting whether first jump information and/or second jump information exist in jump information of the signal to be modulated;
if the first jump information and/or the second jump information are detected, modulating a signal to be modulated corresponding to the first jump information and/or the second jump information into a first polarity pulse signal and/or a second polarity pulse signal, and taking the first polarity pulse signal and/or the second polarity pulse signal as a polarity pulse signal;
The signal hopping directions of the first hopping information and the second hopping information are opposite, and the pulse polarities of the first polarity pulse signal and the second polarity pulse signal are opposite.
Optionally, the step of modulating the signals to be modulated corresponding to the first jump information and the second jump information into a first polarity pulse signal and a second polarity pulse signal includes:
modulating the signals to be modulated corresponding to the first jump information into first polarity pulse signals with preset numbers, and modulating the signals to be modulated corresponding to the second jump information into second polarity pulse signals with the same numbers as the first polarity pulse signals.
Optionally, the step of modulating the signal to be modulated corresponding to the first jump information into a preset number of first polarity pulse signals, and modulating the signal to be modulated corresponding to the second jump information into a number of second polarity pulse signals equal to the first polarity pulse signals includes:
determining a first time width of the signal to be modulated corresponding to the first jump information, and determining a second time width of the signal to be modulated corresponding to the second jump information;
modulating signals to be modulated corresponding to the first jump information into a preset number of first polarity pulse signals based on the first time width;
Determining a first pulse amplitude corresponding to the first polarity pulse signal, and calculating a first pulse area based on the first pulse amplitude, the first time width and the preset number;
and determining a second pulse area equal to the first pulse area, and modulating the signal to be modulated corresponding to the second jump information into second polarity pulse signals with the same number as that of the first polarity pulse signals based on the second pulse area and the second time width.
In addition, in order to achieve the above object, the present invention also provides a pulse modulation and demodulation communication method, which is applied to a signal receiving end, and the pulse modulation and demodulation communication method includes the following steps:
if a polar pulse signal sent by a signal sending end is received, determining whether the pulse amplitude corresponding to the polar pulse signal is matched with a first detection voltage in preset detection voltages;
and if the pulse amplitude is matched with the first detection voltage, determining that the polarity pulse signal is a first polarity pulse signal, and demodulating the first polarity pulse signal based on first jump information in the jump information to obtain a demodulation signal.
Optionally, after the step of determining whether the pulse amplitude corresponding to the polarity pulse signal matches the first detection voltage of the preset detection voltages, the method further includes:
if the pulse amplitude is not matched with the first detection voltage, determining whether the pulse amplitude is matched with a second detection voltage in preset detection voltages, wherein the polarity of the second detection voltage is opposite to that of the first detection voltage;
and if the pulse amplitude is matched with the second detection voltage, determining that the polarity pulse signal is a second polarity pulse signal, and demodulating the second polarity pulse signal based on second jump information in the jump information to obtain a demodulation signal.
Optionally, after the step of obtaining the demodulated signal, the method further includes:
determining the pulse polarity corresponding to the demodulation signal, and continuously outputting the demodulation signal based on the pulse polarity;
and if the change of the pulse polarity is detected, turning over the output state of the demodulation signal.
In addition, in order to achieve the above object, the present invention also provides a pulse modulation and demodulation communication system, the pulse modulation and demodulation communication system includes a signal transmitting end and a signal receiving end which are communicatively connected, the pulse modulation and demodulation communication system implements the following steps:
The signal transmitting end acquires jump information of a signal to be modulated;
the signal transmitting end modulates the signal to be modulated into a polar pulse signal according to the jump information and transmits the polar pulse signal to a signal receiving end;
if the signal receiving end receives the polar pulse signal sent by the signal sending end, determining whether the pulse amplitude corresponding to the polar pulse signal is matched with a first detection voltage in preset detection voltages or not;
and if the pulse amplitude is matched with the first detection voltage, the signal receiving end determines that the polarity pulse signal is a first polarity pulse signal, and demodulates the first polarity pulse signal based on first jump information in jump information to obtain a demodulation signal.
In addition, in order to achieve the above object, the present invention also provides a pulse modem communication device, the pulse modem communication device including a memory, a processor, and a pulse modem communication program stored on the memory and executable on the processor, wherein: the pulse modulation communication program when executed by the processor implements the steps of the pulse modulation communication method as described above.
In addition, in order to achieve the above object, the present invention also provides a computer-readable storage medium having stored thereon a pulse modulation communication program which, when executed by a processor, implements the steps of the pulse modulation communication method as described above.
According to the pulse modulation and demodulation communication method, the system, the equipment and the storage medium, after the signal sending end obtains the signal to be modulated, the signal to be modulated is modulated into the polar pulse signal according to the hopping information of the signal to be modulated, the signal to be modulated is modulated into the polar pulse signal by utilizing the characteristic that the total frequency of 0 to 1 hops and 1 to 0 hops is similar in the signal to be modulated, the generation of direct current components is reduced, the modulated polar pulse signal is sent to the signal receiving end, the signal transmission capacity is improved, and the effectiveness of signal transmission is improved.
Drawings
Fig. 1 is a schematic structural diagram of a pulse modem communication device in a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a flowchart of a first embodiment of a pulse modulation communication method according to the present invention;
FIG. 3 is a schematic diagram of modulation coding according to an embodiment of the present invention;
FIG. 4 is a flow chart of a third embodiment of a pulse modulation and demodulation communication method according to the present invention;
FIG. 5 is a schematic flow chart of polar pulse demodulation according to an embodiment of the present invention;
FIG. 6 is a schematic diagram illustrating a signal output process according to an embodiment of the present invention;
FIG. 7 is a decoding schematic diagram according to an embodiment of the present invention;
fig. 8 is a schematic diagram of a pulse modem communication system according to the present invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a pulse modem communication device in a hardware operating environment according to an embodiment of the present invention.
As shown in fig. 1, the pulse modem communication apparatus may include: a processor 1001, such as a central processing unit (Central Processing Unit, CPU), a communication bus 1002, a user interface 1003, a network interface 1004, a memory 1005. Wherein the communication bus 1002 is used to enable connected communication between these components. The user interface 1003 may include a Display, an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may further include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a WIreless interface (e.g., a WIreless-FIdelity (WI-FI) interface). The Memory 1005 may be a high-speed random access Memory (Random Access Memory, RAM) Memory or a stable nonvolatile Memory (NVM), such as a disk Memory. The memory 1005 may also optionally be a storage device separate from the processor 1001 described above.
It will be appreciated by those skilled in the art that the structure shown in fig. 1 is not limiting of the pulse modem communication device and may include more or fewer components than shown, or may combine certain components, or a different arrangement of components.
As shown in fig. 1, an operating system, a data storage module, a network communication module, a user interface module, and a pulse modem communication program may be included in the memory 1005 as one type of storage medium.
In the pulse modem communication device shown in fig. 1, the network interface 1004 is mainly used for data communication with other devices; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 in the pulse modulation and demodulation communication device of the present invention may be disposed in the pulse modulation and demodulation communication device, where the pulse modulation and demodulation communication device invokes a pulse modulation and demodulation communication program stored in the memory 1005 through the processor 1001, and executes the pulse modulation and demodulation communication method provided in the embodiment of the present invention.
The embodiment of the invention provides a pulse modulation and demodulation communication method, which is applied to a signal transmitting end, and referring to fig. 2, fig. 2 is a flow chart of a first embodiment of the pulse modulation and demodulation communication method.
In this embodiment, the pulse modulation and demodulation communication method includes:
step S100, obtaining a signal to be modulated and obtaining jump information of the signal to be modulated;
in the present embodiment, modulation refers to converting various digital baseband signals into digital modulation signals (modulated signals or band signals) suitable for channel transmission. The digital signal is represented by signal states of 0 and 1. . The transition information refers to information of a digital state change in a signal to be modulated, for example, a transition from 0 to 1 or a transition from 1 to 0 in the digital signal. In this embodiment, the digital signal to be modulated is hopped to encode to generate a polarity pulse signal, where the polarity pulse signal includes a positive polarity pulse signal and a negative polarity pulse signal, and the generation of a direct current component is reduced by modulating the polarity pulse signal, so as to realize direct long-distance transmission of the signal. The signal to be modulated refers to a digital baseband signal which is not modulated yet.
Step S200, modulating the signal to be modulated into a polar pulse signal according to the jump information, and transmitting the polar pulse signal to a signal receiving end.
In this embodiment, the polar pulse signal refers to a signal that is modulated and then used for transmission on a channel. Before the signal to be modulated is sent out, the signal to be modulated is modulated so as to facilitate channel transmission. Based on two different conditions corresponding to the jump information of the signal to be modulated, the signal to be modulated can be modulated respectively based on a certain modulation rule, and two polarity pulse signals with different pulse polarities are generated. Specifically, a signal to be modulated is modulated according to jump information of the modulated signal to obtain a polar pulse signal, and the polar pulse signal is sent to a signal receiving end.
In the embodiment of the invention, after the signal transmitting end acquires the hopping information of the signal to be modulated, the signal to be modulated is modulated into the polar pulse signal according to the hopping information, the signal to be modulated is modulated into the polar pulse signal by utilizing the characteristic that the total frequency of the hopping from 0 to 1 and the hopping from 1 to 0 is similar in the signal to be modulated, the generation of direct current components is reduced, the modulated polar pulse signal is transmitted to the signal receiving end, the signal transmission capacity is improved, and the effectiveness of signal transmission is increased.
Further, based on the first embodiment of the pulse modulation and demodulation communication method of the present invention, a second embodiment of the pulse modulation and demodulation communication method of the present invention is provided, wherein the step S200 includes the steps of modulating the signal to be modulated into a polar pulse signal according to the hopping information of the signal to be modulated, and transmitting the polar pulse signal to a signal receiving end, and includes:
step a, detecting whether first jump information and/or second jump information exist in jump information of the signal to be modulated;
b, if the first jump information and/or the second jump information are detected, modulating a signal to be modulated corresponding to the first jump information and/or the second jump information into a first polarity pulse signal and/or a second polarity pulse signal, taking the first polarity pulse signal and/or the second polarity pulse signal as a polarity pulse signal, and sending the polarity pulse signal to a signal receiving end;
The signal hopping directions of the first hopping information and the second hopping information are opposite, and the pulse polarities of the first polarity pulse signal and the second polarity pulse signal are opposite.
In this embodiment, it should be noted that the jump information refers to a jump from 0 to 1 or a jump from 1 to 0 in the digital signal, where the first jump information or the second jump information may specifically be a jump from 0 to 1 or a jump from 1 to 0, and is not strictly limited, and may be determined according to actual requirements under a condition that a signal jump direction of the first jump information and a signal jump direction of the second jump information are opposite. In this embodiment, taking a transition from 0 to 1 in the digital signal as the first transition information, a transition from 1 to 0 in the digital signal as the second transition information is described. The first polarity pulse signal and the second polarity pulse signal may include positive polarity pulse signal or negative polarity pulse signal, which are not strictly limited, and may be determined under the condition of ensuring that the pulse polarities of the first polarity pulse signal and the second polarity pulse signal are opposite according to actual requirements. In this embodiment, the first polarity pulse signal is taken as a positive polarity pulse signal, and the second polarity pulse signal is taken as a negative polarity pulse signal as an example. The first jump information corresponds to a first polarity pulse signal, and when the first jump information is detected, a signal to be modulated corresponding to the first jump information is modulated into the first polarity pulse signal; the second jump information corresponds to the second polarity pulse signal, and when the second jump information is detected, the signal to be modulated corresponding to the second jump information is modulated into the second polarity pulse signal. For example, when first jump information exists in the jump information of the signal to be modulated, namely when the jump of the digital signal from 0 to 1 is detected, the signal to be modulated when the jump of the digital signal from 0 to 1 starts to be modulated into a first polarity pulse signal, namely a positive polarity pulse signal; when the jump information in the signal to be modulated is detected to have second jump information, namely when the jump of the digital signal from 1 to 0 is detected, the signal to be modulated when the jump is from 1 to 0 starts to be modulated into a second polarity pulse signal, namely a negative polarity pulse signal.
In this embodiment, the signal to be modulated is modulated into the polarity pulse signal through the jump information, so that the direct current component of the modulated signal is reduced, and the signal transmission capability is effectively improved.
Further, the step of modulating the signal to be modulated corresponding to the first jump information and/or the second jump information into a first polarity pulse signal and/or a second polarity pulse signal includes:
and c, modulating the signals to be modulated corresponding to the first jump information into first polarity pulse signals with preset numbers, and modulating the signals to be modulated corresponding to the second jump information into second polarity pulse signals with the same numbers as the first polarity pulse signals.
In this embodiment, it should be noted that the preset number refers to the number of pulses determined according to the actual application requirement, and the number of pulses is a positive integer. The first polarity pulse signal and the second polarity pulse signal are set to be equal in number, so that the polarity pulse signals with different pulse polarities are in pairs. Specifically, the signal to be modulated corresponding to the first jump signal is modulated into a preset number of first polarity pulse signals, for example, when the signal to be modulated jumps from 0 to 1, the signal to be modulated is modulated into a number of first polarity pulse signals of N. The second pulse signal is modulated into the second polarity pulse signal with the same number as the first polarity pulse signal, for example, when the signal to be modulated jumps from 1 to 0, the signal to be modulated is modulated into the second polarity pulse signal with the number of M. Wherein n=m, N, M takes a positive integer.
It can be appreciated that the preset number may be preset, and the number of the first polarity pulse signal and the second polarity pulse signal is limited; the number of the first polarity pulse signals may be limited in advance, and the number of the second polarity pulse signals may be further controlled to be equal to the number of the first polarity pulse signals; after the signal to be modulated corresponding to the first jump information is converted into a certain number of first polarity pulse signals, the certain number is used as a preset number, and the first polarity pulse signals are not limited in advance at this time, so that the number of second polarity pulse signals is further controlled to be equal to the number of the first polarity pulse signals.
In this embodiment, the numbers of the first polarity pulse signal and the second polarity pulse signal are set to be equal, so that pulse signals with different polarities always appear in pairs, that is, the modulated signal contains a reduced dc component, thereby effectively improving the signal transmission quality.
Further, the step of modulating the signal to be modulated corresponding to the first jump information into a first polarity pulse signal with a preset number, and modulating the signal to be modulated corresponding to the second jump information into a second polarity pulse signal with the same number as that of the first polarity pulse signal includes:
Step d, determining a first time width of the signal to be modulated corresponding to the first jump information, and determining a second time width of the signal to be modulated corresponding to the second jump information;
step e, modulating the signal to be modulated corresponding to the first jump information into a preset number of first polarity pulse signals based on the first time width;
f, determining a first pulse amplitude corresponding to the first polarity pulse signal, and calculating a first pulse area based on the first pulse amplitude, the first time width and the preset number;
and g, determining a second pulse area equal to the first pulse area, and modulating the signal to be modulated corresponding to the second jump information into second polarity pulse signals with the same number as that of the first polarity pulse signals based on the second pulse area and the second time width.
In this embodiment, it should be noted that, the first time width refers to a duration of the signal to be modulated corresponding to the first jump information, for example, when the first jump information jumps from 0 to 1, after the jump, until the next jump, the state of the signal to be modulated will be kept as 1, and the first time width is a duration of the signal to be modulated with the state of 1. The second time width refers to the duration of the signal to be modulated corresponding to the second jump information. In the application, it is assumed that the duration of the signal to be modulated corresponding to the first hopping information is one symbol bit, and beyond the duration, the next symbol bit is entered. Therefore, in this embodiment, in order to ensure accurate modulation of the signal to be modulated corresponding to the first hopping information and ensure accurate recovery of the demodulated signal obtained by demodulating after the modulation, it is necessary to limit the modulation of the signal to be modulated within the duration time width of the signal to be modulated, that is, limit the total number of the time widths of all the first polarity pulse signals corresponding to the signal to be modulated corresponding to the first hopping information after the modulation to not exceed the first time width; and limiting the total number of the time widths of the second polarity pulse signals corresponding to the signals to be modulated corresponding to the second jump information after modulation not to exceed the second time width. For example, the number of the first polarity pulse signals is N, and the number of the second polarity pulse signals is M, so that the total time width of the N or M pulses is limited to be less than or equal to the time for holding the state 1 or 0 of the signal to be modulated corresponding to the total time width.
In this embodiment, it should be noted that, the first pulse area is an area corresponding to the first polarity pulse signal, the first pulse area is a sum of areas corresponding to all the first polarity pulse signals, and the area of each first polarity pulse signal is a product of a first pulse amplitude corresponding to each first polarity pulse signal and a time width maintained by each first polarity pulse signal; the second pulse area is the area corresponding to the second polarity pulse signals, the second pulse area is the sum of the areas corresponding to all the second polarity pulse signals, and the area of each second polarity pulse signal is the product of the second pulse amplitude corresponding to each second polarity pulse signal and the time width kept by each second polarity pulse signal. In order to reduce the generation of the direct current component, the first pulse areas corresponding to all the first polarity pulse signals are further limited to be equal to the second pulse areas corresponding to all the second polarity pulse signals. After determining the first pulse area, limiting the sum of areas of all second polarity pulse signals based on the first pulse area, limiting the number of the second polarity pulse signals to be equal to the number of the first polarity pulse signals based on the preset number corresponding to the first polarity pulse signals, limiting the sum of duration of all second polarity pulse signals based on the second time width of the signal to be modulated corresponding to the second jump signal, and further modulating the signal to be modulated corresponding to the second jump signal into the second polarity pulse signal.
It can be understood that the area, the pulse amplitude and the single duration width of the polarity pulse signal can be flexibly set according to actual requirements, and only the total time width corresponding to the first polarity pulse signal is ensured not to exceed the first time width corresponding to the first jump signal and for which the signal to be modulated is continuous; the total time width corresponding to the second polarity pulse signal does not exceed the second time width corresponding to the second jump signal and lasting the signal to be modulated. And ensuring that the sum of the areas corresponding to all the first polarity pulse signals is equal to the sum of the areas corresponding to all the second polarity pulse signals.
In this embodiment, the areas of the first polarity pulse signal and the second polarity pulse signal are set to be identical, so that pulse signals with different polarities always appear in pairs, that is, the modulated signal contains a reduced dc component, thereby effectively improving the signal transmission quality.
Referring to fig. 3, in one embodiment, the original signal waveform is modulated into a pulse modulated signal waveform, wherein in the encoded illustration, the pulse signal is modulated into a negative polarity pulse signal with m number and VMm amplitude at the first signal transition. Modulated into positive polarity pulse signals with the number of n and the amplitude of VNn at the time of second signal jump. The number of pulses n and m may be positive integers of 1, 2, 3, 4. And the total time width of n or m pulses should be less than the time that a single signal state remains. Pulse amplitudes VNn and VMm represent the amplitudes of the nth and mth pulses, respectively.
The embodiment of the invention provides a pulse modulation and demodulation communication method, which is applied to a signal receiving end, and referring to fig. 4, fig. 4 is a flow chart of a third embodiment of the pulse modulation and demodulation communication method.
Step S300, if a polar pulse signal sent by a signal sending end is received, determining whether the pulse amplitude corresponding to the polar pulse signal is matched with a first detection voltage in preset detection voltages;
in this embodiment, it should be noted that, the preset detection voltage is a reference standard for detecting and judging the pulse polarity of the polarity pulse signal, and the preset detection voltage is set corresponding to the modulation rule for generating the polarity pulse signal during modulation. For example, when modulating a signal to be modulated, the modulation rule is: if the jump information of the signal to be modulated is the jump from 1 to 0, modulating the signal to be modulated into a positive-polarity pulse signal; and if the jump information of the signal to be modulated is a jump from 0 to 1, modulating the signal into a negative polarity pulse signal. The corresponding preset detection voltages will be set for the positive polarity pulse signal and the negative polarity pulse signal, respectively. And determining whether the polarity pulse signal is matched with the preset detection voltage by detecting whether the pulse amplitude of the polarity pulse signal exceeds the range of the preset detection voltage.
In this embodiment, the first detection voltage is a reference standard for demodulating the first polarity pulse signal, for example, if the first polarity pulse signal is a positive polarity pulse signal modulated by the signal to be modulated, when the first polarity pulse signal is detected by the first detection voltage, the first detection voltage is set as the detection voltage for detecting the positive polarity pulse signal, and if the detected pulse amplitude of the polarity pulse signal is greater than the first detection voltage, the first polarity pulse signal is considered to be matched with the first detection voltage.
In this embodiment, the polarity of the polarity pulse signal is detected by the polarity detection voltage, so as to determine the signal state after demodulation of the polarity pulse signal, accurately restore the signal state to be modulated before modulation, and improve the accuracy and effectiveness of signal transmission.
Step S400, if the pulse amplitude matches the first detection voltage, determining that the polarity pulse signal is a first polarity pulse signal, and demodulating the first polarity pulse signal based on the first jump information in the jump information to obtain a demodulated signal.
In this embodiment, demodulation refers to restoring the received digital modulation signal to a digital baseband signal, that is, demodulating the polarity pulse signal to a demodulation signal consistent with the signal to be modulated before modulation. And matching the polarity pulse signal with a preset detection voltage, and determining the signal state before the modulation of the polarity pulse signal so as to demodulate the polarity pulse signal. For example, the preset first polarity pulse signal is a positive polarity pulse signal obtained by modulating a transition from 0 to 1 of the signal to be modulated, the preset detection voltage is V2 with positive polarity, when the pulse amplitude of the positive polarity pulse signal is greater than V2 with positive polarity, the positive polarity pulse signal can be determined to match with the preset detection voltage, and the signal is demodulated to be a transition from 0 to 1 and maintained.
In this embodiment, when the signal receiving end monitors the polar pulse signal sent by the signal sending end, the polar pulse signal is matched with the preset detection voltage, so as to provide a judging reference for polar pulse signal demodulation, so that the polar pulse signal is demodulated based on the matching result, a demodulated signal is obtained, the signal state is accurately recovered, the signal recovery capability is ensured, and the effectiveness of signal transmission is improved.
Further, referring to fig. 5, based on the embodiment shown in fig. 4, step S300, after the step of determining whether the pulse amplitude corresponding to the polarity pulse signal matches the first detection voltage of the preset detection voltages if the polarity pulse signal sent by the signal sending end is received, further includes:
step S500, if the pulse amplitude is not matched with the first detection voltage, determining whether the pulse amplitude is matched with a second detection voltage in preset detection voltages, wherein the polarity of the second detection voltage is opposite to that of the first detection voltage;
the step of demodulating the polarity pulse signal based on the matching result includes:
step S600, if the pulse amplitude matches the second detection voltage, determining that the polarity pulse signal is a second polarity pulse signal, and demodulating the second polarity pulse signal based on the second jump information in the jump information to obtain a demodulated signal.
In this embodiment, the first detection voltage and the second detection voltage are set according to the transmission environment and according to the pulse amplitude polarity of the polarity pulse signal. The second detection voltage is a detection voltage with polarity opposite to that of the first detection voltage. The second detection voltage is a reference standard for demodulating the second polarity pulse signal, for example, if the second polarity pulse signal is a negative polarity pulse signal modulated by a transition of the second transition information of the signal to be modulated from 1 to 0, when the second detection voltage is used for detecting the second polarity pulse signal, the second detection voltage is set as the detection voltage for detecting the negative polarity pulse signal, and if the pulse amplitude of the polarity pulse signal is detected to be smaller than the second detection voltage, the second polarity pulse signal is considered as the negative polarity pulse signal, and the second polarity pulse signal is demodulated to be a transition from 1 to 0 signal and maintained. In this embodiment, when the polarity pulse signal is not matched with the first detection voltage, the polarity pulse signal is matched with the second detection voltage, and if the pulse amplitude is matched with the second detection voltage, the polarity pulse signal is determined to be the second polarity pulse signal, and the second polarity pulse signal is demodulated based on the second jump information in the jump information, so as to obtain a demodulated signal. It is understood that the detection sequence for the polarity pulse signal may be to match the polarity pulse signal with the first detection voltage and the second detection voltage at the same time; or the first detection voltage is matched with the polarity pulse signal, and when the polarity pulse signal is not matched with the first detection voltage, the second detection voltage is used for detection; or the second detection voltage is matched with the polarity pulse signal, and when the polarity pulse signal is not matched with the second detection voltage, the sequence of detection by using the first detection voltage can be flexibly set according to actual requirements.
In this embodiment, the polarity of the polarity pulse signal is detected by the polarity detection voltage, so as to determine the signal state after demodulation of the polarity pulse signal, accurately restore the signal state to be modulated before modulation, and improve the accuracy and effectiveness of signal transmission.
Further, referring to fig. 6, based on the embodiment shown in fig. 4, step S400, if the pulse amplitude matches the second detection voltage, determines that the polarity pulse signal is a second polarity pulse signal, demodulates the second polarity pulse signal based on the second jump information in the jump information, and further includes, after the step of obtaining the demodulated signal:
step 700, determining a pulse polarity corresponding to the demodulation signal, and continuously outputting the demodulation signal based on the pulse polarity;
step 800, if the pulse polarity is detected to be changed, turning over the output state of the demodulation signal.
In this embodiment, after the demodulation signal is determined, the demodulation signal is output, and the demodulation signal is a polarity pulse signal with different polarities, and the demodulation signal is demodulated and output according to the polarity pulse signal with different polarities. When the positive polarity pulse signal or the negative polarity pulse signal is detected again, the demodulation circuit keeps outputting the last state if the detected pulse polarity is consistent with the previous pulse polarity, and turns over the output state if the detected pulse polarity is opposite to the previous pulse polarity. For example, when the polarity detection voltage detects that the polarity of the polarity pulse signal is positive polarity pulse, the corresponding pulse polarity of the demodulation signal is positive polarity pulse, the demodulation circuit outputs high level and maintains at this time, when the polarity detection voltage detects that the polarity of the polarity pulse signal is negative polarity pulse, the corresponding pulse polarity of the demodulation signal is negative polarity pulse, and the demodulation circuit outputs low level and maintains at this time.
It is understood that whether the demodulation circuit outputs a high level or a low level when detecting a positive polarity pulse signal or a negative polarity pulse signal does not limit the correspondence, and the specific output state is determined according to jump information when modulating a signal to be modulated in practical application. For example, a positive polarity pulse signal, the demodulation circuit outputs a signal which jumps from 0 to 1 and is maintained; the demodulation circuit outputs a negative polarity pulse signal, and the signal jumps from 1 to 0 and is maintained.
In this embodiment, the signal state after demodulation of the polar pulse signal is determined by the pulse polarity, so that the signal state to be modulated before modulation is accurately restored and accurately output, and the accuracy and effectiveness of signal transmission are improved.
Referring to fig. 7, in one embodiment, the original signal waveform is modulated into a pulse modulated signal waveform, and then the pulse modulated signal waveform is decoded to output a demodulated signal output waveform. In the coded illustration, the first signal jump is modulated into a negative polarity pulse signal with m number and VMm amplitude. Modulated into positive polarity pulse signals with the number of n and the amplitude of VNn at the time of second signal jump. The number of pulses n and m may be positive integers of 1, 2, 3, 4. Pulse amplitudes VNn and VMm represent the amplitudes of the nth and mth pulses, respectively. Setting detection voltages V1 and V2, presetting V2 to be larger than V1, presetting that the detection circuit judges positive polarity pulse signals when detecting that the pulse amplitude is larger than V2, and judging negative polarity pulse signals when detecting that the pulse amplitude is smaller than V1. If the corresponding positive pulse signal is detected, the demodulation circuit outputs high and maintains, when the positive pulse signal or the negative pulse signal is detected again, if the detected polarity is consistent with the previous pulse polarity, the demodulation circuit keeps outputting in the previous state, and if the detected pulse polarity is opposite to the previous pulse polarity, the demodulation circuit turns over the output state.
In addition, referring to fig. 8, the present invention further proposes a pulse modulation and demodulation communication system, which includes a signal transmitting end and a signal receiving end, wherein:
the signal transmitting end 2001 acquires jump information of a signal to be modulated;
the signal transmitting terminal 2001 modulates the signal to be modulated into a polarity pulse signal according to the jump information, and transmits the polarity pulse signal to a signal receiving terminal;
if the signal receiving end 2002 receives the polar pulse signal sent by the signal sending end, determining whether the pulse amplitude corresponding to the polar pulse signal is matched with a first detection voltage in preset detection voltages;
if the pulse amplitude matches the first detection voltage, the signal receiving end 2002 determines that the polarity pulse signal is a first polarity pulse signal, and demodulates the first polarity pulse signal based on the first jump information in the jump information to obtain a demodulated signal.
Optionally, the signal transmitting terminal 2001 is further configured to:
detecting whether first jump information and/or second jump information exist in jump information of the signal to be modulated;
if the first jump information and/or the second jump information are detected, modulating a signal to be modulated corresponding to the first jump information and/or the second jump information into a first polarity pulse signal and/or a second polarity pulse signal, and taking the first polarity pulse signal and/or the second polarity pulse signal as a polarity pulse signal;
The signal hopping directions of the first hopping information and the second hopping information are opposite, and the pulse polarities of the first polarity pulse signal and the second polarity pulse signal are opposite.
Optionally, the signal transmitting terminal 2001 is further configured to:
modulating the signals to be modulated corresponding to the first jump information into first polarity pulse signals with preset numbers, and modulating the signals to be modulated corresponding to the second jump information into second polarity pulse signals with the same numbers as the first polarity pulse signals.
Optionally, the signal transmitting terminal 2001 is further configured to:
determining a first time width of the signal to be modulated corresponding to the first jump information, and determining a second time width of the signal to be modulated corresponding to the second jump information;
modulating signals to be modulated corresponding to the first jump information into a preset number of first polarity pulse signals based on the first time width;
determining a first pulse amplitude corresponding to the first polarity pulse signal, and calculating a first pulse area based on the first pulse amplitude, the first time width and the preset number;
and determining a second pulse area equal to the first pulse area, and modulating the signal to be modulated corresponding to the second jump information into second polarity pulse signals with the same number as that of the first polarity pulse signals based on the second pulse area and the second time width.
Optionally, the signal receiving terminal 2002 is further configured to:
continuously determining whether the pulse amplitude corresponding to the polarity pulse signal is matched with a first detection voltage in preset detection voltages or not, and continuously judging whether the pulse amplitude corresponding to the polarity pulse signal is matched with a second detection voltage in the preset detection voltages or not, wherein the polarity of the second detection voltage is opposite to that of the first detection voltage;
if the pulse amplitude is not matched with the first detection voltage, determining whether the pulse amplitude is matched with a second detection voltage in preset detection voltages, wherein the polarity of the second detection voltage is opposite to that of the first detection voltage;
and if the pulse amplitude is matched with the second detection voltage, determining that the polarity pulse signal is a second polarity pulse signal, and demodulating the second polarity pulse signal based on second jump information in the jump information to obtain a demodulation signal.
Optionally, the signal receiving terminal 2002 is further configured to:
determining the pulse polarity corresponding to the demodulation signal, and continuously outputting the demodulation signal based on the pulse polarity;
and if the change of the pulse polarity is detected, turning over the output state of the demodulation signal.
The specific implementation manner of the pulse modulation and demodulation communication of the present invention is basically the same as the above-mentioned embodiments of the pulse modulation and demodulation communication method, and will not be described herein.
In addition, the invention also provides a pulse modulation and demodulation communication device, which is characterized by comprising a memory, a processor and a pulse modulation and demodulation communication program stored on the memory and capable of running on the processor, wherein: the pulse modulation and demodulation communication program realizes the pulse modulation and demodulation communication method according to each embodiment of the invention when being executed by the processor.
Furthermore, the invention also proposes a storage medium comprising a computer readable storage medium. On which a pulse modem communication program is stored. The computer readable storage medium may be the Memory 20 in the terminal of fig. 1, or may be at least one of ROM (Read-Only Memory)/RAM (Random Access Memory ), magnetic disk, and optical disk, and the computer readable storage medium includes several instructions for causing a pulse modem communication device having a processor to perform the pulse modem communication method according to the embodiments of the present invention.
It is appreciated that in the description herein, reference to the terms "one embodiment," "another embodiment," "other embodiments," or "first through nth embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) as described above, comprising instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the method according to the embodiments of the present invention.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (6)
1. The pulse modulation and demodulation communication method is characterized in that the pulse modulation and demodulation communication method is applied to a signal transmitting end and comprises the following steps:
acquiring jump information of a signal to be modulated;
modulating the signal to be modulated into a polar pulse signal according to the jump information, and sending the polar pulse signal to a signal receiving end;
the step of modulating the signal to be modulated into a polar pulse signal according to the jump information of the signal to be modulated comprises the following steps:
detecting whether first jump information and/or second jump information exist in jump information of the signal to be modulated;
if the first jump information and/or the second jump information are detected, modulating a signal to be modulated corresponding to the first jump information and/or the second jump information into a first polarity pulse signal and/or a second polarity pulse signal, and taking the first polarity pulse signal and/or the second polarity pulse signal as a polarity pulse signal;
the signal hopping directions of the first hopping information and the second hopping information are opposite, and the pulse polarities of the first polarity pulse signal and the second polarity pulse signal are opposite;
The step of modulating the signals to be modulated corresponding to the first jump information and the second jump information into a first polarity pulse signal and a second polarity pulse signal comprises the following steps:
modulating the signals to be modulated corresponding to the first jump information into first polarity pulse signals with preset numbers, and modulating the signals to be modulated corresponding to the second jump information into second polarity pulse signals with the same numbers as the first polarity pulse signals;
the step of modulating the signal to be modulated corresponding to the first jump information into a first polarity pulse signal with a preset number, and modulating the signal to be modulated corresponding to the second jump information into a second polarity pulse signal with the same number as that of the first polarity pulse signal comprises the following steps:
determining a first time width of the signal to be modulated corresponding to the first jump information, and determining a second time width of the signal to be modulated corresponding to the second jump information;
modulating signals to be modulated corresponding to the first jump information into a preset number of first polarity pulse signals based on the first time width;
determining a first pulse amplitude corresponding to the first polarity pulse signal, and calculating a first pulse area based on the first pulse amplitude, the first time width and the preset number;
And determining a second pulse area equal to the first pulse area, and modulating the signal to be modulated corresponding to the second jump information into second polarity pulse signals with the same number as that of the first polarity pulse signals based on the second pulse area and the second time width.
2. A pulse modulation and demodulation communication method, wherein the pulse modulation and demodulation communication method is applied to a signal receiving end and demodulates a polar pulse signal obtained by modulating the method according to claim 1, and the pulse modulation and demodulation communication method comprises the following steps:
if a polar pulse signal sent by a signal sending end is received, determining whether the pulse amplitude corresponding to the polar pulse signal is matched with a first detection voltage in preset detection voltages;
if the pulse amplitude is matched with the first detection voltage, determining that the polarity pulse signal is a first polarity pulse signal, and demodulating the first polarity pulse signal based on first jump information in jump information to obtain a demodulation signal;
if the pulse amplitude is not matched with the first detection voltage, determining whether the pulse amplitude is matched with a second detection voltage in preset detection voltages, wherein the polarity of the second detection voltage is opposite to that of the first detection voltage;
And if the pulse amplitude is matched with the second detection voltage, determining that the polarity pulse signal is a second polarity pulse signal, and demodulating the second polarity pulse signal based on second jump information in the jump information to obtain a demodulation signal.
3. The pulse modem communication method of claim 2, wherein after the step of obtaining the demodulated signal, further comprising:
determining the pulse polarity corresponding to the demodulation signal, and continuously outputting the demodulation signal based on the pulse polarity;
and if the change of the pulse polarity is detected, turning over the output state of the demodulation signal.
4. The pulse modulation and demodulation communication system is characterized by comprising a signal transmitting end and a signal receiving end which are in communication connection, wherein the pulse modulation and demodulation communication system comprises the following steps:
the signal transmitting end acquires jump information of a signal to be modulated;
the signal transmitting end modulates the signal to be modulated into a polar pulse signal according to the jump information and transmits the polar pulse signal to a signal receiving end;
the signal transmitting end also executes the following steps:
Detecting whether first jump information and/or second jump information exist in jump information of the signal to be modulated;
if the first jump information and/or the second jump information are detected, modulating a signal to be modulated corresponding to the first jump information and/or the second jump information into a first polarity pulse signal and/or a second polarity pulse signal, and taking the first polarity pulse signal and/or the second polarity pulse signal as a polarity pulse signal;
the signal hopping directions of the first hopping information and the second hopping information are opposite, and the pulse polarities of the first polarity pulse signal and the second polarity pulse signal are opposite;
modulating the signals to be modulated corresponding to the first jump information into first polarity pulse signals with preset numbers, and modulating the signals to be modulated corresponding to the second jump information into second polarity pulse signals with the same numbers as the first polarity pulse signals;
determining a first time width of the signal to be modulated corresponding to the first jump information, and determining a second time width of the signal to be modulated corresponding to the second jump information;
modulating signals to be modulated corresponding to the first jump information into a preset number of first polarity pulse signals based on the first time width;
Determining a first pulse amplitude corresponding to the first polarity pulse signal, and calculating a first pulse area based on the first pulse amplitude, the first time width and the preset number;
determining a second pulse area equal to the first pulse area, and modulating a signal to be modulated corresponding to the second jump information into second polarity pulse signals with the same number as that of the first polarity pulse signals based on the second pulse area and the second time width;
if the signal receiving end receives the polar pulse signal sent by the signal sending end, determining whether the pulse amplitude corresponding to the polar pulse signal is matched with a first detection voltage in preset detection voltages or not;
if the pulse amplitude is matched with the first detection voltage, the signal receiving end determines that the polarity pulse signal is a first polarity pulse signal, and demodulates the first polarity pulse signal based on first jump information in jump information to obtain a demodulation signal;
the signal receiving end also executes the following steps:
if the pulse amplitude is not matched with the first detection voltage, determining whether the pulse amplitude is matched with a second detection voltage in preset detection voltages, wherein the polarity of the second detection voltage is opposite to that of the first detection voltage;
And if the pulse amplitude is matched with the second detection voltage, determining that the polarity pulse signal is a second polarity pulse signal, and demodulating the second polarity pulse signal based on second jump information in the jump information to obtain a demodulation signal.
5. A pulse modem communication apparatus, the pulse modem communication apparatus comprising: a memory, a processor and a pulse modem communication program stored on the memory and operable on the processor, the pulse modem communication program being configured to implement the steps of the pulse modem communication method of any one of claims 1, 2 to 3.
6. A storage medium having stored thereon a pulse modem communication program which when executed by a processor performs the steps of the pulse modem communication method according to any one of claims 1, 2 to 3.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1447512A (en) * | 2002-03-25 | 2003-10-08 | 天津电气传动设计研究所 | Control signal transporter in high voltage frequency converter |
| CN103219971A (en) * | 2013-04-19 | 2013-07-24 | 上海大学 | Sinusoidal pulse width modulation (SPWM) impulse wave production system based on modulating wave period normalization |
| CN103516652A (en) * | 2012-06-25 | 2014-01-15 | 电子科技大学 | Continuous phase BPSK modulation method and its modulation device |
| CN104836773A (en) * | 2015-03-31 | 2015-08-12 | 苏州东奇信息科技股份有限公司 | Bipolar binary shift pulse keying modulation and demodulation method |
| CN112804010A (en) * | 2019-11-14 | 2021-05-14 | 苏州东奇信息科技股份有限公司 | Polarity-staggered binary offset pulse keying modulation and demodulation method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7317748B2 (en) * | 2003-02-25 | 2008-01-08 | Matsushita Electric Industrial Co., Ltd. | Methods and apparatus for transmitting and receiving randomly inverted wideband signals |
| WO2006090742A1 (en) * | 2005-02-22 | 2006-08-31 | Tadashi Asahina | Code type transmitting device, and code type receiving device |
| US7936229B2 (en) * | 2005-08-11 | 2011-05-03 | Texas Instruments Incorporated | Local oscillator incorporating phase command exception handling utilizing a quadrature switch |
-
2022
- 2022-03-02 CN CN202210201380.XA patent/CN114614911B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1447512A (en) * | 2002-03-25 | 2003-10-08 | 天津电气传动设计研究所 | Control signal transporter in high voltage frequency converter |
| CN103516652A (en) * | 2012-06-25 | 2014-01-15 | 电子科技大学 | Continuous phase BPSK modulation method and its modulation device |
| CN103219971A (en) * | 2013-04-19 | 2013-07-24 | 上海大学 | Sinusoidal pulse width modulation (SPWM) impulse wave production system based on modulating wave period normalization |
| CN104836773A (en) * | 2015-03-31 | 2015-08-12 | 苏州东奇信息科技股份有限公司 | Bipolar binary shift pulse keying modulation and demodulation method |
| CN112804010A (en) * | 2019-11-14 | 2021-05-14 | 苏州东奇信息科技股份有限公司 | Polarity-staggered binary offset pulse keying modulation and demodulation method |
Non-Patent Citations (3)
| Title |
|---|
| DELTA脉冲调制器的性能研究与实现;张加胜;石油大学学报(自然科学版)(第01期);第79-82页 * |
| 超宽带脉冲波形设计及调制技术研究;李海涨;《中国优秀硕士学位论文全文数据库 (信息科技辑)》;I136-571 * |
| 高效调制多载波与多址技术研究;张鹏;《中国博士学位论文全文数据库 (信息科技辑)》;I136-10 * |
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