Signal sending method, storage medium, electronic device, and computer program product

Abstract

Embodiments of the present disclosure provide a signal sending method, a storage medium, an electronic device, and a computer program product. The signal sending method comprises: adding a time interval to sub-pulses of a first signal, and sending the first signal by means of different sensing and communication nodes.

Description

Signal transmission methods, storage media, electronic devices, and computer program products

[0001] Cross-reference to related applications

[0002] This application is based on and claims priority to Chinese patent application CN202411594097.3, filed on November 8, 2024, entitled “Signal Transmission Method, Storage Medium, Electronic Device and Computer Program Product”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to the field of communications, and more specifically, to a signal transmission method, a storage medium, an electronic device, and a computer program product. Background Technology

[0004] In integrated sensing and communication systems, multi-station cooperative sensing is one of the key technologies for integrated sensing and communication. To minimize interference between multiple stations, it is necessary to maintain the orthogonality of multiple waveforms as much as possible. OFDM-Chirp waveforms based on Orthogonal Frequency-Division Multiplexing (OFDM) are commonly used orthogonal waveform generation schemes in radar sensing. However, because related technologies do not consider the effects of system nonlinearity, the orthogonality of multiple waveforms is destroyed, and the multiple signals are no longer completely orthogonal, which seriously affects the sensing performance of multiple sensing nodes. Summary of the Invention

[0005] This disclosure provides a signal transmission method, a storage medium, an electronic device, and a computer program product.

[0006] According to one embodiment of this disclosure, a signal transmission method is provided, comprising: adding a time interval to a sub-pulse of a first signal; and transmitting the first signal through different inductive nodes.

[0007] According to yet another embodiment of this disclosure, a computer-readable storage medium is also provided, wherein a computer program is stored therein, wherein the computer program is configured to perform the steps in any of the above method embodiments when it is run.

[0008] According to yet another embodiment of this disclosure, an electronic device is also provided, including a memory and a processor, wherein the memory stores a computer program and the processor is configured to run the computer program to perform the steps in any of the above method embodiments.

[0009] According to yet another embodiment of this disclosure, a computer program product is also provided, including a computer program that, when executed by a processor, implements the steps in any of the above method embodiments. Attached Figure Description

[0010] Figure 1 is a hardware structure block diagram of the computer terminal in which the signal transmission method of this embodiment of the present disclosure is operated;

[0011] Figure 2 is a flowchart of a signal transmission method according to an embodiment of the present disclosure;

[0012] Figure 3 is a schematic diagram of the OFDM-Chirp principle according to an embodiment of this disclosure;

[0013] Figure 4 is a time-domain schematic diagram of x1(t) without the added time interval in an embodiment of this disclosure;

[0014] Figure 5 is a time-domain schematic diagram of the added time interval x1(t) according to an embodiment of the present disclosure. Detailed Implementation

[0015] The embodiments of this disclosure will be described in detail below with reference to the accompanying drawings and examples.

[0016] It should be noted that the terms "first," "second," etc., in the specification, claims, and drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0017] In related technologies, integrated communication and sensing refers to a novel signal processing technology that achieves coordinated sensing and communication functions based on software and hardware resource sharing or information sharing. Integrated communication and sensing technology is a new capability of 5G-A and one of the key technologies of 6G. Multi-site cooperative sensing is one of the key technologies of integrated communication and sensing. To minimize interference between multiple stations, it is necessary to maintain the orthogonality of multiple waveforms as much as possible. OFDM-Chirp waveforms are a commonly used orthogonal waveform generation scheme in the field of radar sensing. However, traditional schemes, due to the lack of consideration for the influence of system nonlinearity, will destroy the orthogonality of multiple waveforms, seriously affecting the performance of multi-site sensing.

[0018] The method embodiments provided in this disclosure can be executed in a mobile terminal, computer terminal, or similar computing device. Taking a computer terminal as an example, FIG1 is a hardware structure block diagram of the computer terminal on which the signal transmission method of this disclosure is executed. As shown in FIG1, the computer terminal 100 may include one or more (only one is shown in FIG1) processors 101 (processors 101 may include, but are not limited to, processing devices such as microprocessors MCUs or programmable logic devices FPGAs) and a memory 102 for storing data. The computer terminal may also include transmission devices for communication functions and input / output devices. It will be understood by those skilled in the art that the structure shown in FIG1 is only illustrative and does not limit the structure of the computer terminal. For example, the computer terminal may also include more or fewer components than shown in FIG1, or have a different configuration than shown in FIG1.

[0019] The memory 102 can be used to store computer programs, such as application software programs and modules, like the computer program corresponding to the signal transmission method in this embodiment. The processor 101 executes various functional applications and data processing by running the computer program stored in the memory 102, thus implementing the above-described method. The memory 102 may include high-speed random access memory and non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 102 may further include memory remotely located relative to the processor 101, and these remote memories can be connected to a computer terminal via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0020] The transmission device is used to receive or send data via a network. Specific examples of the network described above may include a wireless network provided by a communication provider for the computer terminal. In one example, the transmission device includes a Network Interface Controller (NIC), which can connect to other network devices via a base station to communicate with the Internet. In another example, the transmission device may be a Radio Frequency (RF) module, used for wireless communication with the Internet.

[0021] This disclosure provides a signal transmission method. Figure 2 is a flowchart of the signal transmission method according to this disclosure. As shown in Figure 2, the process includes the following steps:

[0022] Step S202: Add a time interval to the sub-pulse of the first signal.

[0023] In one exemplary embodiment, adding a time interval to a sub-pulse of a first signal includes adding a time interval at the end of each sub-pulse of the first signal.

[0024] In this embodiment of the disclosure, the first signal can consist of multiple sub-pulses, meaning the first signal is composed of multiple sub-pulses. For example, when the first signal includes a first sub-pulse and a second sub-pulse, time intervals are added to the tails of the first and second sub-pulses, respectively.

[0025] In one exemplary embodiment, the time interval is greater than the time it takes for the tail portion of the sub-pulse to decay to the noise level in the filter.

[0026] In one exemplary embodiment, the time interval is determined by the sensing server based on the hardware level of the sensing node.

[0027] In one exemplary embodiment, adding a time interval to a sub-pulse of a first signal includes: adding a time interval by shortening the pulse width of the sub-pulse when the pulse width of the first signal is constant.

[0028] For example, the meaning of "the pulse width of the first signal is fixed" is that, in the current scenario, the pulse width of the first signal is a fixed value.

[0029] In one exemplary embodiment, shortening the pulse duration of a sub-pulse includes: shortening the pulse duration of a sub-pulse by adjusting the frequency modulation slope of the sub-pulse, given a fixed bandwidth of the inductive system.

[0030] In one exemplary embodiment, the frequency modulation slope is either positive or negative frequency modulation.

[0031] In one exemplary embodiment, adding a time interval to a sub-pulse of the first signal includes: adding a time interval by extending the pulse width of the first signal when the bandwidth of the integrated sensing system is constant and the pulse width of the sub-pulse is fixed.

[0032] In one exemplary embodiment, the method further includes: performing a Fourier transform and discretization on the first signal to obtain a first frequency domain signal, wherein each first frequency domain signal corresponds to N subcarriers, and among the N subcarriers there are M available subcarriers, and the M available subcarriers carry the first frequency domain signal at fixed intervals, wherein M and N are both positive integers, and M is less than N.

[0033] In this embodiment of the disclosure, the first frequency domain signal is the frequency domain representation of the first signal.

[0034] In this embodiment of the disclosure, the fixed interval is a fixed number of available subcarriers spaced apart among M available subcarriers to carry the first frequency domain signal. For example, when the number of sensing nodes is 2, the fixed interval is 2, the number of the first signal and the number of the first frequency domain signal are 2, each first signal includes two subpulses, and among the available subcarriers, the 1st, 3rd, 5th... available subcarriers carry one first frequency domain signal, and among the available subcarriers, the 2nd, 4th, 6th... available subcarriers carry another first frequency domain signal.

[0035] For example, when the number of sensing nodes is 3, the fixed interval is 3, the number of first signals and first frequency domain signals is 3, and each first signal includes three sub-pulses. Among the available subcarriers, the 1st, 4th, 7th... available subcarriers carry the first first frequency domain signal, the 2nd, 5th, 8th... available subcarriers carry the second first frequency domain signal, and the 3rd, 6th, 9th... available subcarriers carry the third first frequency domain signal.

[0036] It should be noted that the aforementioned available subcarriers (1st, 3rd, 5th... and 2nd, 5th, 8th...) are counted only for available subcarriers, i.e., the individual counting order of the M available subcarriers. For the N subcarriers, including the M available subcarriers and unavailable subcarriers, the counting method is separate, and the counting index of the available subcarriers is not used.

[0037] In this embodiment of the disclosure, the description of the counting method for subcarriers and available subcarriers is only to illustrate that the first frequency domain signal is carried at fixed intervals, and the available subcarriers are labeled to reflect the fixed intervals. This embodiment of the disclosure does not impose any restrictions on the labeling or numbering method of subcarriers and available subcarriers.

[0038] Step S204: Send the first signal through different sensing nodes.

[0039] Through the above steps, a signal transmission method is provided. By adding a time interval to the sub-pulses of the first signal and transmitting the first signal through different sensing nodes, the problem of poor sensing performance of sensing nodes caused by the incomplete orthogonality of multiple signals in related technologies is solved. The interference between different sensing base stations, i.e., sensing nodes, is significantly reduced, thereby improving the orthogonality of multiple signals and the sensing performance of sensing nodes.

[0040] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods according to the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the embodiments of this disclosure, or the part that contributes to the related technology, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the embodiments of this disclosure.

[0041] This embodiment also provides a signal transmitting device for implementing the above embodiments and preferred embodiments; details already described will not be repeated. As used below, the term "module" can refer to a combination of software and / or hardware that implements a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0042] The signal transmitting device provided in this embodiment includes an interval adding module and a transmitting module. The interval adding module is used to add time intervals to sub-pulses of a first signal. The transmitting module is configured to transmit the first signal through different sensing nodes. The signal transmitting device provided in this embodiment can be installed at a sensing node of a sensing integrated system, but is not limited to being installed at a sensing node.

[0043] In this embodiment of the disclosure, the signal transmitting device may further include different modules, and the naming and functional division of the modules may be selected in different ways according to the actual situation, without specific limitations.

[0044] It should be noted that the above modules can be implemented by software or hardware. For the latter, they can be implemented in the following ways, but are not limited to: all the above modules are located in the same processor; or, the above modules are located in different processors in any combination.

[0045] This disclosure also provides a computer-readable storage medium storing a computer program configured to perform the steps in any of the above method embodiments when executed.

[0046] In one exemplary embodiment, the aforementioned computer-readable storage medium may include, but is not limited to, various media capable of storing computer programs, such as a USB flash drive, read-only memory (ROM), random access memory (RAM), portable hard disk, magnetic disk, or optical disk.

[0047] This disclosure also provides an electronic device including a memory and a processor, the memory storing a computer program and the processor being configured to run the computer program to perform the steps in any of the above method embodiments.

[0048] In one exemplary embodiment, the electronic device may further include a transmission device and an input / output device, wherein the transmission device is connected to the processor and the input / output device is connected to the processor.

[0049] This disclosure also provides a computer program product, including a computer program that, when executed by a processor, implements the steps in any of the above method embodiments.

[0050] In one exemplary embodiment, the computer program product described above includes a non-volatile computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the method described in the embodiments of this disclosure.

[0051] Specific examples in this embodiment can be found in the examples described in the above embodiments and exemplary implementations, and will not be repeated here.

[0052] Obviously, those skilled in the art should understand that the modules or steps of the embodiments of this disclosure described above can be implemented using general-purpose computing devices. They can be centralized on a single computing device or distributed across a network of multiple computing devices. They can be implemented using computer-executable program code, and thus can be stored in a storage device for execution by a computing device. In some cases, the steps shown or described can be performed in a different order than those presented herein, or they can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. Thus, the embodiments of this disclosure are not limited to any particular combination of hardware and software.

[0053] To enable those skilled in the art to better understand the technical solutions of the embodiments of this disclosure, the following description is provided in conjunction with different embodiments.

[0054] Example 1

[0055] In this embodiment of the disclosure, the number of sub-pulses of the first signal can be multiple. In this embodiment, the example of the first signal including a first sub-pulse and a second sub-pulse is described.

[0056] Figure 3 is a schematic diagram of the OFDM-Chirp principle of this embodiment. As shown in Figure 3, two signals (first signal) are generated using the OFDM-Chirp method for use by two stations (i.e., sensing nodes). Figure 3 shows the frequency domain generation method of the two signals. One signal is placed at an odd frequency point, and the other signal is placed at an even frequency point. The two signals can be used for the transmission sequence of the two sensing nodes respectively.

[0057] The time-domain representation of the two signals shown in Figure 3 is as follows:

[0058] Where x1(t) represents the first signal and x2(t) represents the second signal, the first half of x1(t) and x2(t) are... Indicates the first sub-pulse, the latter half Let represent the second sub-pulse, where t∈[0,2T], k r The chirp slope represents the frequency modulation slope of the chirp signal, T represents the pulse width of the sub-pulse, j represents the imaginary unit, rect represents the rectangular window function, and exp represents the exponential function.

[0059] Figure 4 is a time-domain schematic diagram of x1(t) without adding a time interval according to an embodiment of this disclosure. As shown in Figure 4, in an actual integrated sensing system, due to the nonlinear effect of the system, the tail of the first sub-pulse will have a trailing effect, and the trailing effect will interact with the second sub-pulse, resulting in the generation of new signal components.

[0060] In actual implementation, the above interactions will cause spectrum leakage, with the spectrum of odd-frequency points of x1(t) leaking to even-frequency points; and the spectrum of even-frequency points of x2(t) leaking to odd-frequency points. This will destroy the orthogonality of the two signals.

[0061] In this embodiment of the disclosure, in order to prevent the orthogonality of the two signals from being broken, a certain time interval needs to be added between the two sub-pulses to reduce the spectral leakage caused by nonlinearity.

[0062] In this embodiment, since the above two OFDM-Chirp signals are the extraction of odd and even frequency points in the frequency domain, they should be the repetition of sub-pulses in the time domain. If a time interval T1 is added between the above two sub-pulses, in order to maintain the repetition of the signal in the time domain, a time interval T1 needs to be added at the end of the second sub-pulse at the same time. When actually generating the sequence, N1 zeros corresponding to the time T1 should be filled at the end of the sequence. If the number of sampling points corresponding to T1 is N1, then N1 zeros need to be filled. At this time, the time domain length of the entire signal is 2(T + T1); at this time, if x1(t) is transformed into the frequency domain, the energy will only be at odd frequency points, and the same is true for x2(t).

[0063] In this embodiment, after adding an interval in the time domain, the time domain representations of the two signals are:

[0064] Among them, T' represents the new pulse width of the first sub-pulse, and T1 represents the added time interval. Therefore, the value range of the above time t changes to t ∈ [0, 2(T' + T1)]. FIG. 5 is a time domain schematic diagram of x1(t) with an added time interval in an embodiment of the present disclosure. As shown in FIG. 5, the value range of the above time t is t ∈ [0, 2(T' + T1)].

[0065] If the above time domain signals are sampled in the time domain, the representations of the first signal in the time domain sequence x1(n) and x2(n) are:

[0066] Among them, n represents the nth sampling point in the time domain, N' represents the number of sampling points corresponding to the pulse width T' of the first sub-pulse, and N1 represents the number of sampling points corresponding to the time interval T1.

[0067] The value of the above n within one sub-pulse is n ∈ [0, 2(N' + N1) - 1].

[0068] In an embodiment of the present disclosure, for the above first signal, the method of adding a time interval in the time domain is equally applicable to the frequency domain representation of the first signal.

[0069] In an embodiment of the present disclosure, without considering the cyclic prefix, from the time domain perspective, an OFDM symbol includes N samples, and N is also the number of points of the discrete Fourier transform or inverse discrete Fourier transform of the OFDM symbol. From the frequency domain perspective, N corresponds to the number of subcarriers included in the OFDM symbol. Considering the oversampling factor, only M subcarriers are available among the N subcarriers (M < N), and the remaining (N - M) subcarriers are guard subcarriers and usually do not transmit any signals. Among them, both M and N are positive integers, and M is less than N.

[0070] For the first sub-pulse, t ∈ [0, T'], and its discrete representation is:

[0071] Where n represents the nth sampling point in the time domain, and N' represents the number of sampling points corresponding to the time width T' of the first sub-pulse.

[0072] Correspondingly, in this embodiment, the frequency domain representation of the two first signals, namely the two first frequency domain signals X1(k) and X2(k), is as follows:

[0073] Where θ is the initial phase, which can be any real number; considering periodicity, θ is any real number from 0 to 2π. N f Let be the number of points in the Fourier transform, and k represent the subcarrier index. k∈[Cindx,Cindx+1....Cindx+M-1] represents the set of indices of available subcarriers, where Cindx represents the starting index of the first available subcarrier among the N subcarriers. In this case, the signal X1(k) is placed on the odd frequency point of the available OFDM signal subcarrier, and X2(k) is placed on the even frequency point of the available OFDM signal subcarrier; or the signal X1(k) is placed on the even frequency point of the available OFDM signal subcarrier, and X2(k) is placed on the odd frequency point of the available OFDM signal subcarrier, forming two orthogonal sequences used for orthogonal transmission sequences of two sensing nodes or two sectors. g represents the gain factor.

[0074] In this embodiment of the disclosure, the length of the time interval T1 is related to the performance of the filter. When the tail of the first sub-pulse decays to the noise level in the filter in a time of T0, the time interval T1 only needs to be slightly larger than T0, for example, T0+0.1us. At this time, the orthogonality of the two signals can be guaranteed.

[0075] In this embodiment, the sensing server can determine the aforementioned time interval based on the hardware capabilities of the sensing nodes and notify the sensing nodes of the calculated time interval. In one embodiment, the sensing server needs to notify multiple sensing nodes of the aforementioned time interval, wherein the number of OFDM-Chirp signal channels depends on the number of sensing nodes. In this embodiment, two channels are used as an example, meaning the sensing server needs to notify two sensing nodes of the aforementioned time interval.

[0076] In this embodiment, given a fixed pulse width of the first signal, a time interval is added by shortening the pulse width of the sub-pulse. Given a fixed bandwidth of the integrated sensing system, the pulse width is shortened by adjusting the frequency modulation slope of the sub-pulse. In this embodiment, the frequency modulation slope is either positive or negative frequency modulation.

[0077] In this embodiment of the disclosure, when the bandwidth of the integrated sensing system is fixed and the pulse duration of the sub-pulse is fixed, a time interval is added by extending the pulse duration of the first signal.

[0078] In this embodiment of the disclosure, the meaning of "the bandwidth of the integrated sensing system is certain" is that, in the current scenario, the bandwidth of the integrated sensing system is a fixed value. Similarly, the meaning of "the pulse width of the first signal is certain" is that, in the current scenario, the pulse width of the first signal is a fixed value.

[0079] The above description is merely a preferred embodiment of this disclosure and is not intended to limit the scope of this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A signal transmission method, comprising: Add a time interval to the sub-pulses of the first signal; The first signal is transmitted through different sensor nodes.

2. The method according to claim 1, wherein, The addition of time intervals to the sub-pulses of the first signal includes: The time interval is added to the end of each sub-pulse of the first signal.

3. The method according to claim 1, wherein, Also includes: The first signal is subjected to Fourier transform and discretization to obtain the first frequency domain signal, wherein each first frequency domain signal corresponds to N subcarriers, and there are M available subcarriers among the N subcarriers. The M available subcarriers carry the first frequency domain signal at fixed intervals, wherein M and N are both positive integers, and M is less than N.

4. The method according to claim 1, wherein, The time interval is greater than the time it takes for the tail portion of the sub-pulse to decay to noise level in the filter.

5. The method according to claim 1, wherein, The time interval is determined by the sensing server based on the hardware capabilities of the sensing node.

6. The method according to claim 1, wherein, The addition of time intervals to the sub-pulses of the first signal includes: With a fixed pulse width of the first signal, the time interval is added by shortening the pulse width of the sub-pulse.

7. The method according to claim 6, wherein, Shortening the pulse width of the sub-pulse includes: Given a fixed bandwidth in a synergistic sensing system, the pulse duration can be shortened by adjusting the frequency modulation slope of the sub-pulse.

8. The method according to claim 7, wherein, The frequency modulation slope is either positive or negative.

9. The method according to claim 1, wherein, The addition of time intervals to the sub-pulses of the first signal includes: With a fixed bandwidth in the integrated sensing system and a fixed pulse width for the sub-pulse, the time interval is added by extending the pulse width of the first signal.

10. A computer-readable storage medium storing a computer program, wherein, When the computer program is executed by a processor, it implements the steps of the method described in any one of claims 1 to 9.

11. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the steps of the method according to any one of claims 1 to 9.

12. A computer program product comprising a computer program that, when executed by a processor, implements the steps of the method described in any one of claims 1 to 9.

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