Weak current communication method and weak current communication system

Abstract

The present application discloses a weak-current communication method and a weak-current communication system, which belong to the field of weak-current communication technology. The weak-current communication method includes: performing anti-interference modulation on a signal to obtain a modulated signal; performing regeneration processing on the modulated signal to reconstruct the original form and strength of the signal; performing anti-interference demodulation on the regenerated signal; and sending the anti-interference demodulated signal to a receiving device. The present application can solve the problem of signal interference in the weak-current communication process, improve the transmission performance of the signal in an interference environment, and thus significantly improve the signal quality and communication reliability.

Description

Technical Field

[0001] The present application relates to the field of weak current communication technology, and in particular to a weak current communication method and a weak current communication system. Background Art

[0002] In weak current communication systems, signals are often affected by various interference factors, such as electromagnetic interference, signal attenuation, etc., which will lead to a decrease in signal quality and communication reliability. Although some anti-interference methods are currently used, these methods have limited effects in complex interference environments and cannot effectively solve the interference problem during signal transmission. Summary of the invention

[0003] The present application aims to overcome the defects of the above-mentioned prior art and provide a weak-current communication method and a weak-current communication system, which can improve the transmission performance of signals in interference environments, thereby significantly improving signal quality and communication reliability.

[0004] In a first aspect, the present application provides a weak current communication method, comprising: Performing anti-interference modulation on the signal to obtain a modulated signal; Regenerate the modulated signal to restore the original shape and strength of the signal; performing anti-interference demodulation on the regenerated signal; The signal after anti-interference demodulation is sent to a receiving device.

[0005] Optionally, the regenerating the modulated signal includes: amplifying the modulated signal; The modulated signal after signal amplification is shaped.

[0006] Optionally, the signal is subjected to anti-interference modulation by adopting an orthogonal frequency division multiplexing modulation method or an orthogonal amplitude modulation method to obtain the modulated signal.

[0007] Optionally, a coherent demodulation method or a non-coherent demodulation method is used to perform anti-interference demodulation on the regenerated signal.

[0008] Optionally, before performing anti-interference demodulation on the regenerated signal, the method further includes: preprocessing the regenerated signal, wherein the preprocessing includes: removing a DC component from the regenerated signal; Performing signal alignment on the signal after the DC component is removed; Perform timing recovery on the aligned signals.

[0009] Optionally, before sending the anti-interference demodulated signal to a receiving end device, the method further includes: Detecting the signal after the anti-interference demodulation; The detected signal is post-processed, and the post-processing includes: error coding correction and de-interleaving.

[0010] Optionally, before sending the anti-interference demodulated signal to a receiving end device, the method further includes: Converting the signal after the anti-interference demodulation into a format; Perform clock synchronization on the format-converted signal.

[0011] Optionally, before performing anti-interference modulation on the signal, the method further includes: Collect channel status information; Dynamically adjust the frequency allocation strategy based on the status information; The transmission frequency of the signal is adjusted based on the frequency allocation strategy.

[0012] In a second aspect, the present application further provides a weak current communication system, the weak current communication system comprising: A modulation module, used for performing anti-interference modulation on the signal to obtain a modulated signal; A regeneration processing module, used for performing regeneration processing on the modulated signal to reconstruct the original form and strength of the signal; An anti-interference demodulation module, used for performing anti-interference demodulation on the regenerated signal; The receiving end device is used to receive the signal after anti-interference demodulation.

[0013] Optionally, the weak current communication system further includes: A frequency allocation module, used to dynamically adjust the frequency allocation strategy based on the channel status information; The transmitting end device is used to adjust the transmitting frequency of the signal based on the frequency allocation strategy.

[0014] The weak current communication method and weak current communication system of the present application have the following beneficial effects: by performing anti-interference modulation on the signal to obtain a modulated signal; performing regeneration processing on the modulated signal to reconstruct the original form and strength of the signal; performing anti-interference demodulation on the regenerated signal; and sending the anti-interference demodulated signal to the receiving end device. The present application can solve the signal interference problem in the weak current communication process, improve the transmission performance of the signal in an interference environment, and thus significantly improve the signal quality and communication reliability.

[0015] In order to make the above features and advantages of the invention more obvious and easy to understand, embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or related technologies, the drawings required for use in the embodiments or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a flow chart of a weak current communication method provided in one embodiment of the present application.

[0018] Figure 2 This is a module intention of a weak current communication system provided in another embodiment of the present application. DETAILED DESCRIPTION

[0019] In order to make the purpose and technical solution of the embodiment of the present application clearer, the technical solution of the embodiment of the present application will be clearly and completely described in conjunction with the drawings of the embodiment of the present application. Obviously, the described embodiment is a part of the embodiment of the present application, not all of the embodiments. Based on the described embodiment of the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0020] In one embodiment, see Figure 1 The present application provides a weak-current communication method, which may include the following steps: S101~S104.

[0021] Step S101: performing anti-interference modulation on a signal to obtain a modulated signal.

[0022] Step S102: regenerate the modulated signal to reconstruct the original shape and strength of the signal.

[0023] Step S103: performing anti-interference demodulation on the regenerated signal.

[0024] Step S104: sending the signal after the anti-interference demodulation to a receiving device.

[0025] In the weak current communication method of the present application, the signal is subjected to anti-interference modulation to obtain a modulated signal; the modulated signal is subjected to regeneration processing to reconstruct the original form and strength of the signal; the regenerated signal is subjected to anti-interference demodulation; and the anti-interference demodulated signal is sent to a receiving device. The present application can solve the signal interference problem in the weak current communication process, improve the transmission performance of the signal in an interference environment, and thus significantly improve the signal quality and communication reliability.

[0026] In step S101, refer to Figure 1In step S101, the signal is subjected to anti-interference modulation to obtain a modulated signal.

[0027] As an example, the signal may be an original signal, such as a baseband signal. The signal may be subjected to anti-interference modulation, so that the anti-interference capability of the signal in a complex electromagnetic environment may be significantly improved.

[0028] As an example, in step S101, according to the characteristics of the signal and the interference environment, the optimal anti-interference modulation technology is selected to modulate the signal and convert the information signal into one or more parameters of the carrier signal, such as frequency, amplitude or phase. The selected modulation technology can adapt to different interference environments and ensure the robustness of the signal during transmission.

[0029] As an example, the signal is subjected to anti-interference modulation using the orthogonal frequency division multiplexing modulation method or the orthogonal amplitude modulation method to obtain the modulated signal.

[0030] As an example, for an environment with multipath interference, the orthogonal frequency division multiplexing modulation can be used. The orthogonal frequency division multiplexing is a multi-carrier modulation technology that decomposes a high-speed data stream into multiple low-speed sub-streams, each of which is independently modulated on its own sub-carrier. These sub-carriers are orthogonal, meaning that they are separated in frequency, which can effectively use spectrum resources and reduce interference between the sub-carriers.

[0031] The OFDM modulation is widely used in wireless communication systems, such as Wi-Fi, 4G / 5G mobile communications, etc., especially in channels with large multipath delays, because it can combat the multipath effect by adding a cyclic prefix.

[0032] Based on this, the OFDM modulation is generally used in the following situations: when the channel has multipath propagation and frequency selective fading, the OFDM modulation can effectively resist such fading; in applications requiring high data rates and spectrum efficiency; application scenarios include 4G / 5G mobile communications, Wi-Fi, digital TV broadcasting, etc.

[0033] In another example, the quadrature amplitude modulation can be used. The quadrature amplitude modulation is a multiplexing method of amplitude modulation on two orthogonal carriers, which allows multiple bits of information to be transmitted on each carrier. The quadrature amplitude modulation represents data by changing the amplitude and phase of the carrier, which can provide a higher data transmission rate than traditional modulation methods. Common applications of the quadrature amplitude modulation include cable television, satellite communications, and digital communication systems.

[0034] Based on this, the orthogonal amplitude modulation is usually used in the following situations: when the data transmission rate needs to be increased while keeping the bandwidth requirement relatively low; when the channel quality is good and a certain error rate can be tolerated, because the orthogonal amplitude modulation is more sensitive to channel noise and interference at high-order modulation; application scenarios include cable TV, satellite communications, xDSL and other wired and wireless communication systems.

[0035] Specifically, the modulation process using the orthogonal amplitude modulation as the anti-interference modulation technology is as follows: in, is the modulated signal, and They are The real and imaginary parts of the symbols, It is The subcarrier frequency, is the total number of subcarriers, It's time. is the ratio of pi.

[0036] In step S102, refer to Figure 1 In step S102, the modulated signal is subjected to the regeneration processing to reconstruct the original form and strength of the signal.

[0037] As an example, in the step S102, regenerating the modulated signal may include the following steps: S1021~S1022.

[0038] S1021: Amplify the modulated signal.

[0039] S1022: Perform shaping processing on the modulated signal after the signal is amplified.

[0040] As an example, in step S1021, a low noise amplifier may be used to preliminarily amplify a weak received signal (ie, the modulated signal after modulation in step S101), thereby increasing the energy level of the modulated signal while maintaining the signal quality, thereby reducing the impact of noise in subsequent processing.

[0041] As an example, in step S1022, a shaping unit including a limiter and a filter can be used to shape the modulated signal after signal amplification. Specifically, the amplitude of the modulated signal after signal amplification is limited by the limiter to prevent distortion caused by excessive signal peaks, and then unnecessary frequency components are removed by the filter to ensure the stability and clarity of the signal to facilitate subsequent interference demodulation.

[0042] As an example, after the regeneration process, a high-quality and stable signal can be obtained.

[0043] As an example, after step S102, the following steps are also included: preprocessing the signal after the regeneration process, the preprocessing includes: removing the DC component in the signal after the regeneration process; performing signal alignment on the signal after the DC component is removed; and performing timing recovery on the signal after the signal alignment. Through the preprocessing, it can be ensured that the preprocessed signal is synchronized with the subsequent interference demodulation. In step S103, refer to Figure 1 In step S103, anti-interference demodulation is performed on the regenerated signal.

[0044] As an example, a coherent demodulation method or a non-coherent demodulation method may be used to perform anti-interference demodulation on the regenerated signal; specifically, the anti-interference demodulation method may correspond to the anti-interference modulation.

[0045] As an example, the orthogonal amplitude modulation is used for modulation. The demodulator in this step can perform reverse deduction according to the result of the previous formula in step S101 based on the known modulation mode through corresponding mathematical operations to extract the received signal. and value, thereby restoring the original information.

[0046] As an example, the coherent demodulation is used for demodulation, and a local oscillator signal having the same frequency and phase as the regenerated signal is mixed with the regenerated signal to extract information. The formula used is as follows: , in, is the mixed signal, is the received signal after the regeneration process, c is the local oscillation signal.

[0047] As an example, after step S103, the following steps may be further included: detecting the signal after the anti-interference demodulation; post-processing the detected signal, wherein the post-processing includes: error coding correction and deinterleaving.

[0048] Specifically, after mixing, the baseband signal is obtained through a low-pass filter, and then a signal detection algorithm, such as maximum likelihood detection or minimum mean square error detection, is used to estimate the transmitted symbols.

[0049] As an example, by performing post-processing such as error coding correction and deinterleaving on the detected signal, the accuracy of the signal obtained by interference decoding can be further improved.

[0050] In step S104, refer to Figure 1 In step S104, the signal after anti-interference demodulation is sent to the receiving end device.

[0051] As an example, in step S104, before sending the signal after anti-interference demodulation to the receiving end device, the following steps may also be included: format conversion of the signal after anti-interference demodulation; and clock synchronization of the signal after format conversion.

[0052] As an example, the receiving device is a digital signal processor (DSP), and the demodulation module converts the analog signal into a digital signal through an analog-to-digital converter (ADC). This process is expressed as: in, For digital signals, For analog signals.

[0053] As an example, the converted digital signal is synchronized with an internal clock of the digital signal processor to avoid signal distortion caused by clock deviation.

[0054] As an example, the signal is successfully sent to the receiving device, marking the completion of the entire signal transmission process.

[0055] In another embodiment of the present application, before performing the anti-interference modulation on the signal, that is, before step S101, the following steps may also be included: collecting channel status information; dynamically adjusting the frequency allocation strategy based on the status information; and adjusting the signal transmission frequency based on the frequency allocation strategy.

[0056] As an example, selecting the frequency allocation strategy may include: unoccupied frequency resources: if certain frequencies are monitored to have no signal activity within a specific time, these frequencies may be marked as unoccupied; frequency resources with minimal interference: by analyzing the noise frequency distribution, the module can identify frequency intervals with less interference.

[0057] Specifically, the following are some possible allocation strategies: Frequency Avoidance: If the source of interference on a frequency is known, the allocation strategy may avoid using that frequency or frequencies nearby.

[0058] Principle of minimum interference: select frequencies with the minimum interference level for allocation.

[0059] Frequency reuse: multiplexing frequencies in time and space, and dynamically allocating the frequency resources by utilizing the time-varying characteristics of the channel.

[0060] Specifically, the following analysis results are obtained: Frequency A: weak signal strength and low noise level; Frequency B: medium signal strength and high noise level; Frequency C: no signal strength and low noise level (not occupied). Then the dynamic allocation strategy will be: give priority to the frequency C because it is not occupied and has a low noise level; if the frequency C is not available, select the frequency A because although there is a signal, its noise level is low; the frequency B is the last choice because it has a higher noise level.

[0061] As an example, there are multiple signals to be transmitted in the channel, and different frequency resources are allocated according to the characteristics of each signal. For example, the frequency is specifically adjusted using the following formula to perform transmission to the selected frequency channel: in: is the frequency assigned to the signal; is the starting frequency; is the signal sequence number; is the frequency interval.

[0062] As an example, a transmitting device for transmitting a signal may adjust the transmission frequency of the signal according to the above allocation result to ensure that the signal has the best performance on the transmission path.

[0063] In another embodiment of the present application, please refer to Figure 2 The present application also provides a weak current communication system, which includes: a modulation module 201, a regeneration processing module 202, an anti-interference demodulation module 203 and a receiving device 204. The modulation module 201 is used to perform anti-interference modulation on the signal to obtain a modulated signal; the regeneration processing module 202 is used to perform regeneration processing on the modulated signal to reconstruct the original form and strength of the signal; the anti-interference demodulation module 203 is used to perform anti-interference demodulation on the regenerated signal; and the receiving end device 204 is used to receive the signal after anti-interference demodulation.

[0064] As an example, the weak current communication system can be used to perform the following Figure 1 And the steps of the weak current communication method mentioned above; For the specific limitations of the weak current communication system, please refer to the limitations of the weak current communication method mentioned above, which will not be repeated here. Each module in the above-mentioned weak current communication system can be implemented in whole or in part by software, hardware and a combination thereof. The above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory in the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0065] In one example, the modulation module 201 selects the optimal anti-interference modulation technology according to the characteristics of the signal and the interference environment, modulates the signal, and converts the information signal into one or more parameters of the carrier signal, such as frequency, amplitude or phase. The modulation module 201 converts the received signal into a format suitable for transmission. The regeneration processing module 202 may include a low noise amplifier (not shown), a limiter and a filter; after the regeneration processing module 202 captures the modulated signal, the low noise amplifier preliminarily amplifies the weak received signal (i.e., the modulated signal after interference modulation), and the amplified signal is limited by the limiter to limit the amplitude of the signal, and then the unnecessary frequency components are removed by the filter, and the high-quality and stable regenerated signal is output. The anti-interference demodulation module 203 receives the regenerated signal and pre-processes it, including removing the DC component, signal alignment and timing recovery, so that the pre-processed signal is synchronized with the anti-interference demodulation module 203, and selects the corresponding anti-interference demodulation technology according to the anti-interference modulation technology of the signal. Finally, detection and post-processing are performed, including estimating the originally transmitted symbols, error correction, deinterleaving, etc., to recover the original information. The receiving end device 204 receives the signal after the anti-interference demodulation, performs format conversion, synchronization and clock synchronization on the signal after the anti-interference demodulation, and outputs it to the receiving end device through an appropriate interface to complete signal transmission.

[0066] For another example, see Figure 2 The weak current communication system may further include: a frequency allocator 205 and a transmitting end device 206; wherein the frequency allocation module 205 is used to dynamically adjust the frequency allocation strategy based on the state information of the channel; and the transmitting end device 206 is used to adjust the transmission frequency of the signal based on the frequency allocation strategy.

[0067] Specifically, the frequency allocation module 205 monitors the current state of the channel in real time, including the signal strength, noise level and other potential interference factors; based on these monitoring data, the frequency allocation module 205 can dynamically adjust the frequency allocation strategy and select the frequency resources that are not occupied or have the least interference; the signal transmitting end device 206 adjusts the transmission frequency according to the allocation result of the frequency allocation module 205 to achieve effective isolation between different signals, thereby avoiding mutual interference between them. This process enables the signal to occupy the best frequency band during transmission, improving the overall communication efficiency and the stability of the signal.

[0068] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0069] Although the present application has been disclosed as above with the embodiments, it is not intended to limit the present application. Any person with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of the present application. Therefore, the scope of protection of the present application shall be determined by the scope of the attached patent application.

Claims

1. A weak current communication method, characterized in that: include: Performing anti-interference modulation on the signal to obtain a modulated signal; Regenerate the modulated signal to restore the original shape and strength of the signal; performing anti-interference demodulation on the regenerated signal; The signal after anti-interference demodulation is sent to a receiving device.

2. The weak current communication method according to claim 1, characterized in that: The modulated signal is subjected to regeneration processing, comprising: amplifying the modulated signal; The modulated signal after signal amplification is shaped.

3. The weak current communication method according to claim 1, characterized in that: The signal is subjected to anti-interference modulation by adopting an orthogonal frequency division multiplexing modulation mode or an orthogonal amplitude modulation mode to obtain the modulated signal.

4. The weak current communication method according to claim 1, characterized in that: The regenerated signal is demodulated against interference using a coherent demodulation method or a non-coherent demodulation method.

5. The weak current communication method according to claim 1, characterized in that: Before performing anti-interference demodulation on the regenerated signal, the method further includes: performing preprocessing on the regenerated signal, wherein the preprocessing includes: removing a DC component from the regenerated signal; Performing signal alignment on the signal after the DC component is removed; Perform timing recovery on the aligned signals.

6. The weak current communication method according to claim 1, characterized in that: Before sending the anti-interference demodulated signal to the receiving end device, the method further includes: Detecting the signal after the anti-interference demodulation; The detected signal is post-processed, and the post-processing includes: error coding correction and de-interleaving.

7. The weak current communication method according to claim 1, characterized in that: Before sending the anti-interference demodulated signal to the receiving end device, the method further includes: Converting the signal after the anti-interference demodulation into a format; Perform clock synchronization on the format-converted signal.

8. The weak current communication method according to any one of claims 1 to 7, characterized in that: Before performing anti-interference modulation on the signal, it also includes: Collect channel status information; Dynamically adjust the frequency allocation strategy based on the status information; The transmission frequency of the signal is adjusted based on the frequency allocation strategy.

9. A weak current communication system, characterized in that: include: A modulation module, used for performing anti-interference modulation on the signal to obtain a modulated signal; A regeneration processing module, used for performing regeneration processing on the modulated signal to reconstruct the original form and strength of the signal; An anti-interference demodulation module, used for performing anti-interference demodulation on the regenerated signal; The receiving end device is used to receive the signal after anti-interference demodulation.

10. The weak current communication system according to claim 9, characterized in that: The weak current communication system also includes: A frequency allocation module, used to dynamically adjust the frequency allocation strategy based on the channel status information; The transmitting end device is used to adjust the transmitting frequency of the signal based on the frequency allocation strategy.

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