CN114079605B - Communication signal demodulation device and communication signal demodulation method - Google Patents
Communication signal demodulation device and communication signal demodulation method Download PDFInfo
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- CN114079605B CN114079605B CN202010811891.4A CN202010811891A CN114079605B CN 114079605 B CN114079605 B CN 114079605B CN 202010811891 A CN202010811891 A CN 202010811891A CN 114079605 B CN114079605 B CN 114079605B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2649—Demodulators
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
- H04L27/14—Demodulator circuits; Receiver circuits
- H04L27/144—Demodulator circuits; Receiver circuits with demodulation using spectral properties of the received signal, e.g. by using frequency selective- or frequency sensitive elements
- H04L27/148—Demodulator circuits; Receiver circuits with demodulation using spectral properties of the received signal, e.g. by using frequency selective- or frequency sensitive elements using filters, including PLL-type filters
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Abstract
The present application relates to a communication signal demodulation device and a communication signal demodulation method. The communication signal demodulation device is used for demodulating the communication signal to generate an output signal. The communication signal demodulation device includes: the sensing circuits are respectively used for sensing different electrical characteristics of the same communication signal and respectively generating corresponding sensing modulation signals; the processing filters are respectively used for filtering the corresponding sensing modulation signals and respectively generating corresponding filtering modulation signals; a plurality of demodulators for demodulating the plurality of filtered modulated signals respectively to generate corresponding demodulated signals, wherein each of the filtered modulated signals corresponds to at least one demodulator; the judging circuit receives a plurality of demodulation signals, determines whether each unit signal in each demodulation signal is correct or not according to a judging mechanism, and generates an output signal after combining at least one correct unit signal.
Description
Technical Field
The present invention relates to a communication signal demodulation device, and more particularly, to a communication signal demodulation device having an improved communication signal demodulation speed. The invention also relates to a communication signal demodulation method.
Background
Conventional communication signal demodulation devices demodulate (demodulate) a communication signal to obtain desired data. Generally, a known communication signal demodulation device performs a correctness check on demodulated data to ensure that the received data is correct. When the known communication signal demodulation means check the correctness of the demodulated data, the result is incorrect, and the known communication signal demodulation means will re-perform the demodulation procedure on the received communication signal until the demodulated data passes the correctness check.
A disadvantage of this prior art is that the time to demodulate the communication signal is wasted by re-demodulating the new signal because the correctness check is not passed.
For example, in a wireless charging application, when a communication signal between a charging stand and a device to be charged is transmitted, if a correctness check of a demodulated communication signal fails, an initial procedure needs to be restarted to enable the device to be charged to retransmit the communication signal. Therefore, time waste is caused.
In view of the above, the present invention addresses the above-described shortcomings of the prior art by providing a communication signal demodulation device and a communication signal demodulation method that can improve the efficiency of communication signal demodulation.
Disclosure of Invention
In one aspect, the present invention provides a communication signal demodulating apparatus for demodulating a communication signal to generate an output signal, the communication signal demodulating apparatus comprising: the sensing circuits are respectively used for sensing different electrical characteristics of the same communication signal and respectively generating a corresponding sensing modulation signal; the processing filters are respectively used for filtering the corresponding sensing modulation signals and respectively generating a corresponding filtering modulation signal; a plurality of demodulators for demodulating a plurality of the filtered modulated signals respectively, and generating a corresponding demodulation signal respectively, wherein each of the filtered modulated signals corresponds to at least one of the demodulators; and a judging circuit for receiving a plurality of the demodulation signals, determining whether each unit signal in each demodulation signal is correct or not according to a judging mechanism, and generating the output signal after combining at least one correct unit signal.
In another aspect, the present invention provides a communication signal demodulating method for demodulating a communication signal to generate an output signal, the communication signal demodulating method comprising: a plurality of sensing circuits are used for respectively sensing different electrical characteristics of the same communication signal and respectively generating a corresponding sensing modulation signal; filtering a plurality of the sensing modulation signals respectively to generate a corresponding filtering modulation signal; demodulating a plurality of the filtered modulated signals by at least one demodulation program, and generating a corresponding demodulation signal respectively, wherein each of the filtered modulated signals corresponds to at least one demodulation program; and receiving a plurality of the demodulation signals, determining whether each unit signal in each demodulation signal is correct or not according to a judging mechanism, and generating the output signal after combining at least one correct unit signal.
In a preferred embodiment, the cell signal comprises a packet (packet) or a byte (byte).
In a preferred embodiment, the communication signal is transmitted to the communication signal demodulation device via a wireless communication transmission.
In a preferred embodiment, the plurality of demodulators demodulate the plurality of filtered modulated signals with different demodulation procedures.
In a preferred embodiment, the demodulation process of the demodulator for demodulating the filtered modulated signal includes: calculating pulse width between every two instantaneous switches in the filtering modulation signal in an edge triggering mode; and demodulating the filtered modulated signal according to a plurality of the pulse widths between all two instantaneous switches in the filtered modulated signal and a logic level in each pulse width.
In a preferred embodiment, the demodulation process of the demodulator for demodulating the filtered modulated signal includes: counting pulse width between every two instantaneous switches in the filtered modulation signal by a frequency signal; and demodulating the filtered modulated signal according to a plurality of the pulse widths between all two instantaneous switches in the filtered modulated signal and a logic level in each pulse width.
In a preferred embodiment, the determination mechanism includes a checksum (checksum) step and/or a parity check (parity check) step.
The objects, technical contents, features and effects achieved by the present invention will be more readily understood from the following detailed description of specific embodiments.
Drawings
Fig. 1A and 1B are schematic diagrams illustrating an embodiment of a communication signal demodulation apparatus according to the present invention.
FIG. 2A is a schematic diagram of waveforms of different sensing modulation signals for sensing different electrical characteristics of the same communication signal according to the present invention.
Fig. 2B shows signal waveforms of different filtered modulated signals according to the present invention.
Fig. 3A and 3B are schematic diagrams showing related signal waveforms of a demodulation process according to the present invention.
Fig. 4A and 4B are schematic diagrams showing related signal waveforms of another demodulation procedure according to the present invention.
Fig. 5 shows a schematic diagram of a demodulation conversion step according to the present invention.
Description of the symbols in the drawings
1: communication signal demodulation device
11, 12: sensing circuit
21, 22: processing filter
31, 32, 33, 34: demodulator with a plurality of filters
40: judging circuit
Pac11, pac12, pac13, pac21, pac22, pac23, pac31, pac32, pac33, pac41, pac42, pac43: packaging bag
Ref: reference signal
Sdm1, sdm2, sdm3, sdm 4): demodulating signals
Sft1, sft2: filtering a modulated signal
Detailed Description
The drawings in the present invention are schematic and are mainly intended to represent coupling relationships between circuits and relationships between signal waveforms, which are not drawn to scale.
Fig. 1A and 1B are schematic diagrams illustrating an embodiment of a communication signal demodulation apparatus according to the present invention. Fig. 1A shows an embodiment of a communication signal demodulating apparatus (communication signal demodulating apparatus 1) according to the present invention. The communication signal demodulation device 1 includes sensing circuits 11 and 12, processing filters 21 and 22, demodulators 31, 32, 33 and 34, and a determination circuit 40.
As shown in fig. 1A, the communication signal demodulation device 1 is configured to demodulate a communication signal to generate an output signal. In a preferred embodiment, the communication signal is transmitted to the communication signal demodulation device 1 via a wireless communication transmission mode. For example, in the application of wireless charging of a mobile phone, communication signals are transmitted between the charging stand and the mobile phone in a wireless communication transmission manner.
With continued reference to fig. 1A, the sensing circuits 11 and 12 are respectively configured to sense different electrical characteristics of the same communication signal, and respectively generate corresponding sensing modulation signals Ssm1 and Ssm2. For example, the sensing circuit 11 is, but not limited to, a voltage sensing circuit for sensing the voltage of the communication signal to generate a voltage sensing signal, i.e. a sensing modulation signal Ssm1; the sensing circuit 12 is, for example and not limited to, a current sensing circuit for sensing the current of the communication signal and generating a current sensing signal, i.e. a sensing modulation signal Ssm2.
With continued reference to fig. 1A, the processing filters 21 and 22 are respectively configured to filter the corresponding sensing modulation signals Ssm1 and Ssm2, and respectively generate corresponding filtered modulation signals Sft1 and Sft2. Please refer to fig. 2A and fig. 2B, fig. 2A shows different sensing modulation signal waveforms for sensing different electrical characteristics of the same communication signal according to the present invention; fig. 2B shows signal waveforms of different filtered modulated signals according to the present invention. As shown in fig. 2A and 2B, the sensing modulation signals Ssm1 and Ssm2 with higher noise are converted into the filtering modulation signals Sft1 and Sft2 with lower noise after the filtering of the processing filters 21 and 22, so as to facilitate the execution of the subsequent demodulation process.
With continued reference to fig. 1A, the demodulators 31, 32, 33, and 34 are configured to demodulate the filtered modulated signals Sft1 and Sft2, respectively, and generate corresponding demodulated signals Sdm1, sdm2, sdm3, and Sdm4, respectively, wherein each of the filtered modulated signals Sft1 and Sft2 corresponds to at least one of the demodulators 31, 32, 33, and 34. As shown, the filtered modulated signal Sft1 corresponds to the demodulators 31 and 32, for example; the filtered modulated signal Sft2 corresponds to the demodulators 33 and 34, for example. For example, the demodulators 31, 32, 33 and 34 respectively employ the same or different demodulation processes to demodulate the filtered modulated signals Sft1 and Sft2, and respectively generate the corresponding demodulated signals Sdm1, sdm2, sdm3 and Sdm4.
With continued reference to fig. 1A, the determining circuit 40 receives the plurality of demodulation signals Sdm1, sdm2, sdm3 and Sdm4, determines whether each of the demodulation signals Sdm1, sdm2, sdm3 and Sdm4 is correct according to the determining mechanism, and generates an output signal after combining at least one correct unit signal. Referring to fig. 1B, for example, a unit signal refers to a packet (packet), and the demodulation signal Sdm1 has packets Pac11, pac12, and Pac13; the demodulation signal Sdm2 has packets Pac21, pac22 and Pac23; the demodulation signal Sdm3 has packets Pac31, pac32, and Pac33; the demodulation signal Sdm4 has packets Pac41, pac42, and Pac43. The judging circuit 40 judges whether each packet is correct or not according to the judging mechanism, as shown in fig. 1B. And combining the correct packets into an output signal according to the judgment result. Therefore, the defects of the prior art can be avoided, the communication signal does not need to be received again, the time for transmitting and demodulating the communication signal is saved, and the communication efficiency is improved.
It should be noted that, the unit signal is not limited to be a packet, for example, it may be a byte (byte), the judging circuit 40 is not limited to judging the correctness of each packet, and it is also possible to use the same judging mechanism to judge whether each byte is correct or not, and combine the correct bytes into a correct packet or directly combine the correct bytes into an output signal, which falls within the scope of the present invention.
It should be noted that there are various embodiments of the judging mechanism, for example, the judging mechanism includes a checksum (checksum) step and/or a parity check (parity check) step. This is well known to those skilled in the art and will not be described here in detail.
Referring to fig. 3A and 3B, fig. 3A and 3B show waveforms of signals associated with a demodulation process according to the present invention. Fig. 3A shows a signal waveform of the filtered modulated signal Sft1. As shown in fig. 3A, the demodulator 31 triggers a plurality of pulses as shown in fig. 3B to generate the pulse signal Spw1, for example, in an edge triggering manner, that is, when the filtered modulated signal Sft1 is switched instantaneously, that is, a rising edge (rising edge) and a falling edge (falling edge) occur. Next, the demodulator 31 calculates the pulse width between every two instantaneous switches in the filtered modulated signal Sft1 according to the pulse signal Spw1. Next, the demodulator 31 demodulates the filtered modulated signal Sft1 according to the plurality of pulse widths between all two instantaneous switches in the filtered modulated signal Sft1 and the logic level in each pulse width. Referring to fig. 5, a schematic diagram of a demodulation conversion step according to the present invention is shown. As shown in fig. 5, in a bi-phase demodulation conversion step, the logic level of each pulse width of the filtered modulation signal Sft1 is compared with the reference signal Ref, for example, in a period of a combination of a high level pulse and a low level pulse of the reference signal Ref, the logic level of two pulse widths of the corresponding filtered modulation signal Sft1 has a combination of a high level and a low level, which represents a logic "1"; the logic level of both pulse widths of the filtered modulated signal Sft1 is either high or low, representing a logic "0", which is used to demodulate the filtered modulated signal Sft1.
Referring to fig. 4A and 4B, fig. 4A and 4B show waveforms of signals according to another demodulation process according to the present invention. Fig. 4A shows a signal waveform of the filtered modulated signal Sft1. As shown in fig. 4A, the demodulator 32 counts the time kept at the high level in the filtered modulated signal Sft1, for example, to calculate the pulse width between every two instantaneous switches, thereby generating the pulse signal Spw2. Next, the demodulator 32 calculates the pulse width between every two instantaneous switches in the filtered modulated signal Sft1 according to the pulse signal Spw2. Next, the demodulator 32 demodulates the filtered modulated signal Sft1 according to the plurality of pulse widths between all two instantaneous switches in the filtered modulated signal Sft1 and the logic level in each pulse width. The filtered modulated signal Sft1 is then demodulated by a demodulation and conversion step according to the present invention as shown in fig. 5.
The judging circuit 40 judges whether each unit signal in each demodulation signal is correct or not by a judging mechanism, and generates an output signal after combining at least one unit signal which is correct. For example, the determination mechanism includes a checksum (checksum) step and/or a parity check (parity check) step, which are well known to those skilled in the art and are not described herein.
The invention has the advantages over the prior art that one of the invention uses a plurality of sensing circuits and a plurality of demodulators to demodulate the same communication signal at the same time, and generates the output signal after judging whether each unit signal in the communication signal is correct by the judging circuit and combining one or more correct unit signals, thereby not only confirming the correct demodulation result, but also saving the retransmission of a plurality of communication signals, saving the time for re-demodulating the communication signals and improving the communication efficiency.
The present invention has been described in terms of the preferred embodiments, but the above description is only for the purpose of easily understanding the present invention by those skilled in the art, and is not intended to limit the scope of the claims of the present invention. The embodiments described are not limited to single applications but may be combined, for example, two or more embodiments may be combined, and portions of one embodiment may be substituted for corresponding components of another embodiment. In addition, various equivalent changes and various combinations will be apparent to those skilled in the art, and for example, the term "processing or calculating based on a signal or generating an output result" in the present invention is not limited to the processing or calculating based on the signal itself, but includes performing voltage-to-current conversion, current-to-voltage conversion, and/or scaling conversion of the signal, if necessary, and then processing or calculating based on the converted signal to generate an output result. It will thus be appreciated that those skilled in the art will be able to devise various arrangements which, although not explicitly described herein, embody the principles of the invention and are thus equally well suited to the particular use contemplated. Accordingly, the scope of the invention should be assessed as that of the above and all other equivalent variations.
Claims (14)
1. A communication signal demodulation apparatus for demodulating a communication signal to generate an output signal, the communication signal demodulation apparatus comprising:
the sensing circuits are respectively used for sensing different electrical characteristics of the same communication signal and respectively generating a corresponding sensing modulation signal;
the processing filters are respectively used for filtering the corresponding sensing modulation signals and respectively generating a corresponding filtering modulation signal;
a plurality of demodulators for demodulating a plurality of the filtered modulated signals respectively, and generating a corresponding demodulation signal respectively, wherein each of the filtered modulated signals corresponds to at least one of the demodulators; and
and a judging circuit for receiving a plurality of the demodulation signals, determining whether each unit signal in each demodulation signal is correct or not according to a judging mechanism, and generating the output signal after combining at least one correct unit signal.
2. The communication signal demodulation apparatus of claim 1, wherein the unit signal comprises a packet or a byte.
3. The communication signal demodulation apparatus according to claim 1, wherein the communication signal is transmitted to the communication signal demodulation apparatus via a wireless communication transmission scheme.
4. The communication signal demodulating apparatus according to claim 1, wherein the plurality of demodulators demodulate the plurality of filtered modulated signals with different demodulation procedures.
5. The communication signal demodulating apparatus according to claim 1, wherein the demodulator corresponds to a demodulating program for demodulating the filtered modulated signal, comprising:
calculating pulse width between every two instantaneous switches in the filtering modulation signal in an edge triggering mode; and
demodulating the filtered modulated signal according to a plurality of the pulse widths between all two instantaneous switches in the filtered modulated signal and a logic level in each pulse width.
6. The communication signal demodulating apparatus according to claim 1, wherein the demodulator corresponds to a demodulating program for demodulating the filtered modulated signal, comprising:
counting pulse width between every two instantaneous switches in the filtered modulation signal by a frequency signal; and
demodulating the filtered modulated signal according to a plurality of the pulse widths between all two instantaneous switches in the filtered modulated signal and a logic level in each pulse width.
7. The communication signal demodulating apparatus according to claim 1, wherein the judging means includes a checksum step and/or a homonymy checksum step.
8. A communication signal demodulation method for demodulating a communication signal to generate an output signal, the communication signal demodulation method comprising:
a plurality of sensing circuits are used for respectively sensing different electrical characteristics of the same communication signal and respectively generating a corresponding sensing modulation signal;
filtering a plurality of the sensing modulation signals respectively to generate a corresponding filtering modulation signal;
demodulating a plurality of the filtered modulated signals by at least one demodulation program, and generating a corresponding demodulation signal respectively, wherein each of the filtered modulated signals corresponds to at least one demodulation program; and
the method comprises the steps of receiving a plurality of demodulation signals, determining whether each unit signal in each demodulation signal is correct or not according to a judging mechanism, combining at least one correct unit signal, and generating the output signal.
9. The method of claim 8, wherein the unit signal comprises a packet or a byte.
10. The communication signal demodulation method of claim 8, wherein the communication signal is generated via a wireless communication transmission scheme.
11. The communication signal demodulation method of claim 8, wherein each of the filtered modulated signals corresponds to a plurality of the demodulation processes.
12. The communication signal demodulation method of claim 8, wherein the demodulation process of demodulating the filtered modulated signal comprises:
calculating pulse width between every two instantaneous switches in the filtering modulation signal in an edge triggering mode; and
demodulating the filtered modulated signal according to a plurality of the pulse widths between all two instantaneous switches in the filtered modulated signal and a logic level in each pulse width.
13. The communication signal demodulation method of claim 8, wherein the demodulation process of demodulating the filtered modulated signal comprises:
counting pulse width between every two instantaneous switches in the filtered modulation signal by a frequency signal; and
demodulating the filtered modulated signal according to a plurality of the pulse widths between all two instantaneous switches in the filtered modulated signal and a logic level in each pulse width.
14. The communication signal demodulation method of claim 8, wherein the determination mechanism comprises a checksum step and/or a parity check step.
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