Signal transmission method and device, terminal and storage medium

Abstract

The application discloses a signal transmission method, device, terminal and storage medium, and belongs to the communication field. The signal transmission method of the application embodiment comprises the following steps: performing encoding processing on to-be-transmitted bit data to obtain a modulation signal corresponding to the to-be-transmitted bit data; writing the modulation signal into a first resource domain constructed by a Doppler dimension and a frequency dimension to obtain a modulation signal in the first resource domain; transforming the modulation signal in the first resource domain to a second resource domain constructed by a time dimension and a frequency dimension to obtain a modulation signal in the second resource domain; and determining a transmittable signal of the to-be-transmitted bit data based on the modulation signal in the second resource domain.

Description

Technical Field

[0001] This application relates to the field of communications, and more particularly to a signal transmission method, apparatus, terminal, and storage medium. Background Technology

[0002] With the development of communication and industrial technologies, people's requirements for wireless communication rates in high-speed mobile scenarios are increasing. Long Term Evolution (LTE) and New Radio (NR) systems mainly use Orthogonal Frequency Division Multiplexing (OFDM) single-carrier and multi-carrier waveform technologies. Considering the user's movement speed, this waveform is more suitable for signal transmission for low-speed mobile users. However, the rapid time-varying characteristics of high-speed mobile users cause certain limitations in demodulation performance under this waveform. Therefore, a signal transmission method that improves signal demodulation performance for high-speed mobile users is needed. Summary of the Invention

[0003] This application provides a signal transmission method, apparatus, terminal, and storage medium that can improve signal demodulation performance for high-speed mobile users.

[0004] In a first aspect, a signal transmission method is provided, the method comprising: encoding bit data to be transmitted to obtain a modulation signal corresponding to the bit data to be transmitted; writing the modulation signal into a first resource domain constructed by a Doppler dimension and a frequency dimension to obtain a modulation signal in the first resource domain; transforming the modulation signal in the first resource domain to a second resource domain constructed by a time dimension and a frequency dimension to obtain a modulation signal in the second resource domain; and determining a transmittable signal of the bit data to be transmitted based on the modulation signal in the second resource domain.

[0005] Secondly, a signal transmission method is provided, the method comprising: receiving a transmittable signal and determining a modulation signal in a second resource domain constructed from a time dimension and a frequency dimension corresponding to the transmittable signal; transforming the modulation signal in the second resource domain to a first resource domain constructed from a Doppler dimension and a frequency dimension to obtain a modulation signal in the first resource domain; extracting the modulation signal in the first resource domain and decoding the extracted modulation signal to obtain bit data to be processed.

[0006] Thirdly, a transmitting device is provided, comprising: an encoding module for encoding bit data to be transmitted to obtain a modulation signal corresponding to the bit data to be transmitted; a writing module for writing the modulation signal into a first resource domain constructed from Doppler and frequency dimensions to obtain a modulation signal in the first resource domain; a conversion module for converting the modulation signal in the first resource domain to a second resource domain constructed from time and frequency dimensions to obtain a modulation signal in the second resource domain; and a transmitting module for determining a transmittable signal of the bit data to be transmitted based on the modulation signal in the second resource domain.

[0007] Fourthly, a receiving device is provided, comprising: a receiving module for receiving a transmittable signal and determining a modulation signal in a second resource domain constructed from a time dimension and a frequency dimension corresponding to the transmittable signal; a transformation module for transforming the modulation signal in the second resource domain to a first resource domain constructed from a Doppler dimension and a frequency dimension to obtain a modulation signal in the first resource domain; and an extraction module for extracting the modulation signal in the first resource domain and decoding the extracted modulation signal to obtain bit data to be processed.

[0008] Fifthly, a readable storage medium is provided, on which a program or instructions are stored, which, when executed by a processor, implement the steps of the method described in the first aspect, or implement the steps of the method described in the second aspect.

[0009] In a sixth aspect, a chip is provided, the chip including a processor and a communication interface coupled to the processor, the processor being configured to run programs or instructions to implement the method as described in the first aspect, or to implement the method as described in the second aspect.

[0010] In a seventh aspect, a computer program / program product is provided, the computer program / program product being stored in a storage medium, the computer program / program product being executed by at least one processor to implement the steps of the signal transmission method as described in the first or second aspect.

[0011] In this embodiment, the modulated signal corresponding to the bit data to be transmitted is obtained by encoding the bit data to be transmitted. The modulated signal is written into a first resource domain constructed by the Doppler and frequency dimensions to obtain the modulated signal in the first resource domain. The modulated signal in the first resource domain is transformed into a second resource domain constructed by the time and frequency dimensions to obtain the modulated signal in the second resource domain. Based on the modulated signal in the second resource domain, the transmittable signal of the bit data to be transmitted is determined. Based on the Orthogonal Frequency Division Multiplexing (OFDM) waveform, a new waveform-frequency Doppler orthogonal space division technique (ODFS) is proposed. This waveform not only has better backward compatibility but also retains the technical advantages of OFDM. It is also resistant to the demodulation performance degradation caused by rapid channel time-varying. Moreover, it considers Doppler diversity gain, which can significantly improve demodulation performance and user perception, especially for high-speed mobile users. In addition, this waveform technique can also weaken the influence of sub-band or symbol-level interference within the system and improve anti-interference capability. Attached Figure Description

[0012] Figure 1 This diagram illustrates a wireless communication system to which embodiments of this application may be applied.

[0013] Figure 2 This is a schematic flowchart of a signal transmission method according to an embodiment of this application;

[0014] Figure 3 This is a schematic diagram illustrating the signal conversion process between domains according to an embodiment of this application;

[0015] Figure 4 This is a schematic diagram of the structure of a transmitting device according to an embodiment of this application;

[0016] Figure 5 This is a schematic flowchart of a signal transmission method according to another embodiment of this application;

[0017] Figure 6 This is a schematic diagram comparing the performance of ODFS and OFDM waveforms in a Los channel scenario according to an embodiment of this application;

[0018] Figure 7 This is a schematic diagram comparing the performance of ODFS and OFDM waveforms in a NLos channel scenario according to an embodiment of this application;

[0019] Figure 8 This is a schematic diagram of the structure of a terminal according to an embodiment of this application;

[0020] Figure 9 This is a schematic diagram of the structure of a receiving device according to another embodiment of this application;

[0021] Figure 10 This is a schematic diagram of the structure of a network-side device according to another embodiment of this application. Detailed Implementation

[0022] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0023] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0024] It is worth noting that the technologies described in this application are not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" in this application are often used interchangeably, and the described technologies can be used with the systems and radio technologies mentioned above, as well as with other systems and radio technologies. The following description describes New Radio (NR) systems for illustrative purposes, and the term NR is used in most of the following description; however, these technologies can also be applied to applications other than NR systems, such as 6th generation (6G) radio systems. th Generation 6G communication system.

[0025] Figure 1This diagram illustrates a block diagram of a wireless communication system applicable to embodiments of this application. The wireless communication system includes a transmitting device 11 and a receiving device 12. The transmitting device 11 can be a mobile phone, tablet computer, laptop computer, personal digital assistant (PDA), handheld computer, netbook, ultra-mobile personal computer (UMPC), mobile internet device (MID), augmented reality (AR) / virtual reality (VR) device, robot, wearable device, vehicle-mounted device (VUE), pedestrian terminal (PUE), smart home (home devices with wireless communication capabilities, such as refrigerators, televisions, washing machines, or furniture), game console, personal computer (PC), ATM, or self-service machine, etc. Wearable devices include: smartwatches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart chains, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. It should be noted that the specific type of transmitting device 11 is not limited in this application embodiment. The receiving device 12 may include access network equipment or core network equipment. Access network equipment 12 may also be referred to as radio access network equipment, radio access network (RAN), radio access network function, or radio access network unit. Access network equipment 12 may include base stations, WLAN access points, or WiFi nodes, etc. A base station may be referred to as a Node B, evolved Node B (eNB), access point, base transceiver station (BTS), radio base station, radio transceiver, basic service set (BSS), extended service set (ESS), home B node, home evolved B node, transmitting and receiving point (TRP), or any other suitable term in the field, as long as the same technical effect is achieved. The base station is not limited to specific technical terms. It should be noted that in this embodiment, only a base station in an NR system is used as an example for description, and the specific type of base station is not limited.Core network equipment may include, but is not limited to, at least one of the following: core network node, core network function, Mobility Management Entity (MME), Access and Mobility Management Function (AMF), Session Management Function (SMF), User Plane Function (UPF), Policy Control Function (PCF), Policy and Charging Rules Function (PCRF), Edge Application Server Discovery Function (EASDF), Unified Data Management (UDM), Unified Data Repository (UDR), Home Subscriber Server (HSS), Centralized network configuration (CNC), Network Repository Function (NRF), Network Exposure Function (NEF), Local NEF (or L-NEF), and Binding Support Function. Support Function (BSF), Application Function (AF), etc. It should be noted that this application embodiment only uses the core network equipment in the NR system as an example for description, and does not limit the specific type of core network equipment.

[0026] The signal transmission method provided in this application will be described in detail below with reference to the accompanying drawings, through some embodiments and application scenarios.

[0027] like Figure 2 As shown, one embodiment of this application provides a signal transmission method 200. This method can be executed by a transmitting device, which can be a terminal or a network-side device. In other words, this method can be executed by software or hardware installed on the terminal. The method includes the following steps:

[0028] S202: Encode the bit data to be transmitted to obtain a modulation signal corresponding to the bit data to be transmitted.

[0029] In one implementation, bit-level processing such as channel coding can be performed on the bit data stream to be transmitted to obtain the modulation signal corresponding to the bit data to be transmitted.

[0030] S204: Write the modulation signal into a first resource domain constructed from the Doppler dimension and the frequency dimension to obtain the modulation signal in the first resource domain.

[0031] In one implementation, the encoded modulated signal can be mapped to a first resource domain (i.e., the Frequency-Doppler domain, or simply the DF domain) constructed from the Doppler and frequency dimensions according to certain rules. The specific data symbol mapping process can be written sequentially by row or by column, without any restriction.

[0032] S206: Transform the modulation signal in the first resource domain into a second resource domain constructed from the time dimension and the frequency dimension to obtain the modulation signal in the second resource domain.

[0033] The grid size in the first resource domain and the grid size in the second resource domain can be the same or different. In one implementation, if the grid size in the first resource domain and the grid size in the second resource domain are the same, the modulation signal in the first resource domain can be directly transformed into the second resource domain constructed by the time dimension and the frequency dimension to obtain the modulation signal in the second resource domain.

[0034] In one implementation, if the grid size in the first resource domain is inconsistent with that in the second resource domain (i.e., the Time-Frequency domain, which can be simply referred to as the physical TF domain), the modulation signal in the first resource domain can be transformed into a third resource domain (i.e., the Time-Frequency domain, which can be simply referred to as the virtual TF domain) constructed by the time and frequency dimensions to obtain the modulation signal in the third resource domain. The grid size in the third resource domain is consistent with that in the first resource domain. Then, the modulation signal in the third resource domain is mapped to the second resource domain constructed by the time and frequency dimensions and written into the second resource domain in turn, either row or column.

[0035] Figure 3 This is a schematic diagram illustrating the resource mapping process from the first resource domain to the second resource domain. For example... Figure 3 As shown, the grid in the third resource domain can be the same size as the grid in the first resource domain, and the data flow in the first resource domain can be transformed into the third resource domain constructed by the time dimension and the frequency dimension.

[0036] In one implementation, the modulated signal in the first resource domain can be transformed along the Doppler direction to a third resource domain constructed from the time and frequency dimensions using inverse Fourier transform. The inverse Fourier transform can be a type of transform such as inverse discrete Fourier transform or inverse short-time Fourier transform.

[0037] In some examples, the resource grid in the DF domain can be represented by M*N, where M represents the number of sampling points in the frequency dimension and N represents the number of sampling points in the Doppler dimension. The modulated signal of each resource grid can be represented by X[m,d], which identifies the m-th modulated signal in the frequency dimension and the d-th modulated signal in the Doppler dimension. The following formula, using the Inverse Discrete Fourier Transform (IDFT) as an example, transforms the modulated signal X[m,d] in the DF domain to the TF domain, i.e.

[0038]

[0039] It should be noted that N can be the number of points in the IDFT transform, and its value can be the same or different in different frequency directions.

[0040] Then, the modulation signal of the virtual TF domain is mapped to the physical resource block of the physical TF domain according to a preset mapping rule. There can be multiple preset mapping rules; for example, the TF signal of the virtual TF domain can be written into the resource grid of the physical TF domain of the actual physical resource block row by row. The actual size of the physical resource block transmitted by the user is F*T, and the resource mapping can be performed row by row.

[0041] S208: Based on the modulation signal in the second resource domain, determine the transmittable signal of the bit data to be transmitted.

[0042] In one implementation, the demodulation reference signal corresponding to the bit data to be transmitted can be mapped to a second resource domain to obtain the demodulation reference signal (DMRS) in the second resource domain, such as... Figure 3 As shown, DMRS and Data (i.e., the modulated signal) can be mapped in the physical TF domain, and then the transmittable signal can be determined based on the modulated signal and demodulated reference signal in the second resource domain.

[0043] In one implementation, the modulated signal in the second resource domain can be precoded to obtain a precoded signal corresponding to the modulated signal in the second resource domain. Then, the precoded signal and the demodulation reference signal in the second resource domain are transformed into a time-domain transmit signal, and the time-domain transmit signal is determined as a transmittable signal. By precoding the modulated signal in the second resource domain, not only can the peak-to-average power ratio (PAPR) be reduced, but frequency diversity and Doppler diversity gains can also be acquired simultaneously, thereby improving the overall demodulation performance of the user.

[0044] In some examples, if the modulation signal in the second resource domain is a single-carrier signal, it can be precoded in the frequency direction based on the Discrete Fourier Transform (DFT) to obtain a precoded signal corresponding to the modulation signal in the second resource domain.

[0045]

[0046] Where M represents the number of Res carried on a single symbol of a user.

[0047] In some examples, if the signal in the second resource domain is a multicarrier signal, the modulated signal in the second resource domain can be determined as the precoded signal corresponding to the modulated signal in the second resource domain. That is, if the signal in the second resource domain is a multicarrier signal, there is no need to perform transmission precoding processing on X[m,t], i.e., X[f,t]→X[m,t].

[0048] After obtaining the demodulation reference signal in the second resource domain, resource mapping of ports and antennas can be performed on the resource blocks to be transmitted. This process can be achieved by mapping data to ports and antennas using precoding weights (which can be simply referred to as W weights). The precoding weights on data symbols (i.e., precoded signals) and DMRS symbols can be the same or different, depending on the actual method used by the system, and are not limited here. The W weights can be calculated from channel monitoring signals, or obtained from feedback information from the transmitting / receiving equipment, or selected from a preset set of weights. This application does not specifically limit this process.

[0049] Then, the modulation signal and demodulation reference signal in the second resource domain can be frequency-time transformed to obtain the time domain signal (i.e., the transmittable signal). Then, the transmittable signal can be sent out from the radio frequency interface through processes such as windowing and shaping filtering in the radio frequency unit.

[0050] The signal transmission method provided in this application involves encoding the bit data to be transmitted to obtain a modulation signal corresponding to the bit data. The modulation signal is then written into a first resource domain constructed from Doppler and frequency dimensions to obtain the modulation signal in the first resource domain. This modulation signal is then transformed into a second resource domain constructed from time and frequency dimensions to obtain the modulation signal in the second resource domain. Based on the modulation signal in the second resource domain, the transmittable signal of the bit data to be transmitted is determined. A novel waveform-frequency-Doppler orthogonal space division technique (ODFS) is proposed based on Orthogonal Frequency Division Multiplexing (OFDM) waveforms. This waveform not only offers better backward compatibility but also retains the technical advantages of OFDM. It also resists the degradation of demodulation performance caused by rapid channel time-varying. Furthermore, it incorporates Doppler diversity gain, significantly improving demodulation performance and user perception, especially for high-speed mobile users. In addition, this waveform technique can weaken the influence of symbol-level interference within the system or between different systems, enhancing anti-interference capabilities.

[0051] It should be noted that the signal transmission method provided in this application embodiment can be executed by a signal transmission device. In this application embodiment, the signal transmission device is used as an example to illustrate the signal transmission device provided in this application embodiment.

[0052] Figure 4 This is a schematic diagram of the structure of a transmitting device according to an embodiment of this application. Figure 4 As shown, the transmitting device 400 includes: an encoding module 140, a writing module 420, a conversion module 430, and a transmitting module 440.

[0053] The encoding module 410 is used to encode the bit data to be transmitted to obtain a modulation signal corresponding to the bit data to be transmitted; the writing module 420 is used to write the modulation signal into a first resource domain constructed by the Doppler dimension and the frequency dimension to obtain a modulation signal in the first resource domain; the conversion module 430 is used to transform the modulation signal in the first resource domain to a second resource domain constructed by the time dimension and the frequency dimension to obtain a modulation signal in the second resource domain; the transmitting module 440 is used to determine a transmittable signal based on the modulation signal in the second resource domain and transmit the transmittable signal of the bit data to be transmitted.

[0054] In one implementation, the transmitting module 440 is used to map the demodulation reference signal corresponding to the bit data to be transmitted to the second resource domain to obtain the demodulation reference signal in the second resource domain; and to determine the transmittable signal based on the modulation signal and the demodulation reference signal in the second resource domain.

[0055] In one implementation, the transmitting module 440 is configured to precode the modulation signal in the second resource domain to obtain a precoded signal corresponding to the modulation signal in the second resource domain; transform the precoded signal and the demodulation reference signal of the second resource domain into a time-domain transmitting signal, and determine the time-domain transmitting signal as the transmittable signal.

[0056] In one implementation, the grid size in the first resource domain is different from that in the second resource domain. The conversion module 430 is used to transform the modulation signal in the first resource domain to a third resource domain constructed from the time dimension and the frequency dimension to obtain the modulation signal in the third resource domain. The grid size in the third resource domain is the same as that in the first resource domain. The modulation signal in the third resource domain is then mapped to the second resource domain constructed from the time dimension and the frequency dimension.

[0057] In one implementation, the conversion module 430 is used to transform the modulation signal in the first resource domain to the third resource domain constructed by the time dimension and the frequency dimension based on the inverse Fourier transform.

[0058] In one implementation, the modulation signal in the second resource domain is a single-carrier signal, and the transmitting module is used to precode the modulation signal in the second resource domain in the frequency direction based on discrete Fourier transform to obtain a precoded signal corresponding to the modulation signal in the second resource domain.

[0059] In one implementation, the signal in the second resource domain is a multicarrier signal, and the transmitting module is used to determine the modulated signal in the second resource domain as a precoded signal corresponding to the modulated signal in the second resource domain.

[0060] In this embodiment, the modulated signal corresponding to the bit data to be transmitted is obtained by encoding the bit data to be transmitted. The modulated signal is written into a first resource domain constructed by the Doppler and frequency dimensions to obtain the modulated signal in the first resource domain. The modulated signal in the first resource domain is transformed into a second resource domain constructed by the time and frequency dimensions to obtain the modulated signal in the second resource domain. Based on the modulated signal in the second resource domain, the transmittable signal of the bit data to be transmitted is determined. Based on the Orthogonal Frequency Division Multiplexing (OFDM) waveform, a new waveform-frequency Doppler orthogonal space division technique (ODFS) is proposed. This waveform not only has better backward compatibility but also retains the technical advantages of OFDM. It is also resistant to the demodulation performance degradation caused by rapid channel time-varying. Moreover, it considers Doppler diversity gain, which can significantly improve demodulation performance and user perception, especially for high-speed mobile users. In addition, this waveform technique can also weaken the influence of symbol-level interference in sub-bands or different systems within the system, improving anti-interference capability.

[0061] The transmitting device in this application embodiment can be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or a chip. The electronic device can be a terminal or other devices besides a terminal. For example, the transmitting device can be, but is not limited to, the type of transmitting device 11 listed above. Other devices can be servers, network attached storage (NAS), etc., and this application embodiment does not specifically limit the types.

[0062] The launching device provided in this application embodiment can achieve... Figures 2 to 3 The various processes implemented in the method embodiments achieve the same technical effect, and will not be described again here to avoid repetition.

[0063] The above combination Figure 2 A signal transmission method according to embodiments of this application is described in detail. The following will be combined with... Figure 5 A signal transmission method according to another embodiment of this application is described in detail. It will be understood that the interaction between the receiving device and the transmitting device described from the receiving device side... Figure 2 The descriptions of the transmitting equipment side in the methods shown are the same; to avoid repetition, relevant descriptions have been omitted as appropriate.

[0064] Figure 5This is a schematic diagram illustrating the implementation flow of the signal transmission method according to an embodiment of this application. It can be applied to the receiving device side, which can be a terminal or a network-side device, such as... Figure 5 As shown, the method 500 includes:

[0065] S502: Receive a transmittable signal and determine the modulation signal in a second resource domain constructed from the time dimension and the frequency dimension corresponding to the transmittable signal.

[0066] In one implementation, the baseband obtains the time-domain signal (i.e., the transmittable signal) in the digital domain through the transmission of the Remote Radio Unit (RRU). Then, the frequency-domain signal corresponding to the transmittable signal can be determined. After precoding and inverse processing of the frequency-domain signal, the modulation signal in the second resource domain constructed by the time and frequency dimensions is obtained.

[0067] In some examples, a demodulation reference signal can be obtained based on the frequency domain signal, and channel estimation and basic measurements can be performed based on the demodulation reference signal to determine the precoding weights. Based on the precoding weights, the frequency domain signal is equalized to eliminate the channel response and obtain the equalized frequency domain signal. The equalized X[f,t] is then used for the inverse precoding process to obtain X[m,t] (i.e., the modulation signal in the second resource domain).

[0068] In some examples, if X[f,t] is a single carrier, the data can be sequentially processed in reverse transmission precoding according to symbols in the time dimension, i.e., an IDFT transform can be performed, as follows:

[0069]

[0070] Where M represents the number of Res carried on a single symbol of a user.

[0071] In some examples, if X[f,t] is a multicarrier, then no inverse precoding processing of data symbols is required, i.e., X[m,t] = X[f,t].

[0072] S504: Transform the modulation signal in the second resource domain into a first resource domain constructed from the Doppler dimension and the frequency dimension to obtain the modulation signal in the first resource domain.

[0073] The grid size in the first resource domain can be the same as or different from the grid size in the second resource domain. In one implementation, if the grid size in the first resource domain is the same as the grid size in the second resource domain, the modulation signal in the second resource domain can be directly transformed into the first resource domain constructed by the Doppler dimension and the frequency dimension to obtain the modulation signal in the first resource domain.

[0074] In one implementation, if the grid size in the first resource domain is inconsistent with that in the second resource domain (i.e., the Time-Frequency domain, which can be simply referred to as the physical TF domain), the modulation signal in the second resource domain can be mapped to a third resource domain constructed from the time and frequency dimensions according to the mapping relationship between the virtual DF domain and the physical DF domain consistent with the transmitting device. The grid size in the third resource domain is consistent with that in the first resource domain. The modulation signal in the third resource domain is then transformed back to the first resource domain constructed from the Doppler and frequency dimensions to obtain the modulation signal in the first resource domain.

[0075] In some examples, the X[m,t] obtained by precoding inverse processing can be mapped to the virtual resource block of the virtual TF domain (i.e., the third resource domain) to obtain the TF domain signal on the virtual resource block. Then, in the The signal is then converted to the DF domain (i.e., the first resource domain). This conversion can be achieved through transformations such as DFT, FFT, and STFT, allowing the signal to move from the virtual TF domain to the DF domain. For example, using DFT...

[0076]

[0077] The value of N depends on whether the DMRS symbol carries data Re. Generally, there are only two values ​​to choose from, which are related to the mapping pattern of DMRS and Data.

[0078] S506: Extract the modulation signal from the first resource domain and decode the extracted modulation signal to obtain the bit data to be processed.

[0079] In one implementation, the valid modulated signal can be extracted from the DF domain, and the modulation information is then passed to the precoding, demodulation, de-layering modules and the bit-level processing module to obtain valid decoded bit data. Where the terminal's DMRS and the modulated signal use the same precoding weights, the inverse precoding process can be omitted.

[0080] In one implementation, the extracted modulated signal can be decoded to obtain the bit data to be processed and a first verification result. The first verification result can be a verification result generated by the transmitting device based on the bit data to be processed. Based on the bit data to be processed, a second verification result is generated, and based on the second verification result and the first verification result, it is determined whether the bit data to be processed has been tampered with during transmission. The first verification result can be a Cyclic Redundancy Check (CRC) result.

[0081] Figure 6This section compares the performance of ODFS and OFDM waveforms in Los channel scenarios. Figure 7 This paper compares the performance of ODFS and OFDM waveforms in the NLos channel scenario. Figure 6 and Figure 7 To compare the performance of ODFS and OFDM waveforms under different channel scenarios obtained through simulation experiments, from... Figure 6 and Figure 7 It can be seen that in both Los channel and NLos channel scenarios, the performance of the OFDM waveform proposed in this application is higher than that of the ODFS waveform.

[0082] In this embodiment, a transmittable signal is received, and the modulation signal in the second resource domain, constructed from the time and frequency dimensions, corresponding to the transmittable signal is determined. The modulation signal in the second resource domain is then transformed into a first resource domain constructed from the Doppler and frequency dimensions to obtain the modulation signal in the first resource domain. The modulation signal in the first resource domain is extracted, and the extracted modulation signal is decoded to obtain the bit data to be processed. This application proposes a new waveform-frequency-Doppler orthogonal space division technique (ODFS) based on Orthogonal Frequency Division Multiplexing (OFDM) waveforms. This waveform not only offers better backward compatibility but also retains the technical advantages of OFDM. It also resists the degradation of demodulation performance caused by rapid channel time-varying. Furthermore, it considers Doppler diversity gain, which significantly improves demodulation performance and user perception, especially for high-speed mobile users. In addition, this waveform technique can weaken the influence of symbol-level interference within the system or between different systems, improving anti-interference capabilities.

[0083] The transmitting device provided in this application embodiment can achieve... Figure 2-3 The signal transmission method embodiments implement various processes or corresponding processes, achieving the same or corresponding technical effects. To avoid repetition, these will not be described again here. Optionally, such as Figure 8 As shown, this application embodiment also provides a terminal 800, including a processor 801 and a memory 802. The memory 802 stores a program or instructions that can run on the processor 801. When the program or instructions are executed by the processor 801, they implement the various steps of the above-mentioned signal transmission method embodiment and can achieve the same technical effect. To avoid repetition, they will not be described again here.

[0084] The terminal may also include, but is not limited to, at least some of the following components: radio frequency unit, network module, audio output unit, input unit, sensor, display unit, user input unit, interface unit, memory, and processor.

[0085] Those skilled in the art will understand that the terminal may also include a power supply (such as a battery) to power the various components. The power supply can be connected to the processor logic through a power management system, thereby enabling functions such as charging, discharging, and power consumption management through the power management system. The terminal structure shown in the figure does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0086] This application also provides a readable storage medium storing a program or instructions. When the program or instructions are executed by a processor, they implement the various processes of the above-described signal transmission method embodiments and achieve the same technical effects. To avoid repetition, they will not be described again here.

[0087] The processor is the processor in the terminal described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0088] Figure 9 This is a schematic diagram of the structure of a receiving device according to an embodiment of this application. Figure 9 As shown, the receiving device 900 includes: a receiving module 910, a conversion module 920, and an extraction module 930.

[0089] The receiving module 910 is used to receive a transmittable signal and determine the modulation signal in a second resource domain constructed from the time and frequency dimensions corresponding to the transmittable signal; the transformation module 920 is used to transform the modulation signal in the second resource domain to a first resource domain constructed from the Doppler and frequency dimensions to obtain the modulation signal in the first resource domain; the extraction module 930 is used to extract the modulation signal in the first resource domain and perform decoding processing on the extracted modulation signal to obtain the bit data to be processed.

[0090] In one implementation, the receiving module 910 is configured to determine the frequency domain signal corresponding to the transmittable signal; and perform precoding inverse processing on the frequency domain signal to obtain the modulation signal in the second resource domain constructed from the time dimension and the frequency dimension.

[0091] In one implementation, the grid size in the first resource domain is different from that in the second resource domain. The transformation module 920 is used to map the modulation signal in the second resource domain to a third resource domain constructed from time and frequency dimensions, wherein the grid size in the third resource domain is the same as that in the first resource domain; and transform the modulation signal in the third resource domain to the first resource domain constructed from Doppler and frequency dimensions to obtain the modulation signal in the first resource domain.

[0092] In one implementation, the extraction module 930 is used to decode the extracted modulation signal to obtain the bit data to be processed and a first verification result, wherein the first verification result is a verification result generated by the transmitting device based on the bit data to be processed; based on the bit data to be processed, a second verification result is generated, and based on the second verification result and the first verification result, it is determined whether the bit data to be processed has been tampered with during transmission.

[0093] In one implementation, the receiving module 910 is configured to acquire a demodulation reference signal based on the frequency domain signal, and determine a precoding weight based on the demodulation reference signal; perform equalization processing on the frequency domain signal based on the precoding weight to obtain an equalized frequency domain signal, and determine the equalized frequency domain signal as the modulation signal in the second resource domain.

[0094] The signal transmission device provided in this application embodiment can achieve Figure 5 The various processes implemented in the transmission method embodiments, or the corresponding processes, achieve the same or corresponding technical effects. To avoid repetition, they will not be described in detail here.

[0095] This application also provides a receiving device, which corresponds to the above-described signal transmission method. All implementation processes and methods of the above-described method can be applied to this receiving device and achieve the same technical effect.

[0096] Specifically, embodiments of this application also provide a network-side device. For example... Figure 10 As shown, the network device 1000 includes: an antenna 1001, a radio frequency (RF) device 1002, a baseband device 1003, a processor 1004, and a memory 1005. The antenna 1001 is connected to the RF device 1002. In the uplink direction, the RF device 1002 receives information through the antenna 1001 and transmits the received information to the baseband device 1003 for processing. In the downlink direction, the baseband device 1003 processes the information to be transmitted and sends it to the RF device 1002. The RF device 1002 processes the received information and transmits it through the antenna 1001.

[0097] The method executed by the network-side device in the above embodiments can be implemented in the baseband device 1003, which includes a baseband processor.

[0098] The baseband device 1003 may include, for example, at least one baseband board on which multiple chips are disposed, such as... Figure 10 As shown, one of the chips is, for example, a baseband processor, which is connected to the memory 1005 via a bus interface to call the program in the memory 1005 and execute the network device operation shown in the above method embodiment.

[0099] The network-side device may also include a network interface 1006, such as a common public radio interface (CPRI).

[0100] Specifically, the network-side device 1000 in this application embodiment further includes: instructions or programs stored in memory 1005 and executable on processor 1004, wherein processor 1004 calls the instructions or programs in memory 1005 to execute. Figure 9 The methods executed by each module shown achieve the same technical effect, and to avoid repetition, they will not be described in detail here.

[0101] This application also provides a readable storage medium storing a program or instructions. When the program or instructions are executed by a processor, they implement the various processes of the above-described signal transmission method embodiments and achieve the same technical effects. To avoid repetition, they will not be described again here.

[0102] The processor is the processor in the transmitting device described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0103] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the various processes of the above-described signal transmission method embodiments and achieve the same technical effect. To avoid repetition, it will not be described again here.

[0104] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0105] This application also provides a computer program / program product, which is stored in a storage medium and executed by at least one processor to implement the various processes of the above-described signal transmission method embodiments, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0106] This application also provides a signal transmission system, including a transmitting device and a receiving device. The transmitting device can be used to perform the steps of the signal transmission method described above, and the receiving device can be used to perform the steps of the signal transmission method described above.

[0107] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0108] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of 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 this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a computer 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 (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0109] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A method for transmitting a signal, characterized in that, The method includes: Encode the bit data to be transmitted to obtain a modulation signal corresponding to the bit data to be transmitted. The modulation signal is written into a first resource domain constructed from the Doppler dimension and the frequency dimension to obtain the modulation signal in the first resource domain; The modulation signal in the first resource domain is transformed into the second resource domain constructed by the time dimension and the frequency dimension to obtain the modulation signal in the second resource domain. Based on the modulation signal in the second resource domain, the transmittable signal of the bit data to be transmitted is determined.

2. The method as described in claim 1, characterized in that, Determining the transmittable signal of the bit data to be transmitted based on the modulation signal in the second resource domain includes: The demodulation reference signal corresponding to the bit data to be transmitted is mapped to the second resource domain to obtain the demodulation reference signal in the second resource domain. The transmittable signal is determined based on the modulation signal and demodulation reference signal in the second resource domain.

3. The method as described in claim 2, characterized in that, The step of determining the transmittable signal of the bit data to be transmitted based on the modulation signal and demodulation reference signal in the second resource domain includes: The modulation signal in the second resource domain is precoded to obtain a precoded signal corresponding to the modulation signal in the second resource domain; The precoded signal and the demodulation reference signal of the second resource domain are transformed into a time-domain transmit signal, and the time-domain transmit signal is determined as the transmittable signal.

4. The method as described in claim 3, characterized in that, The grid sizes in the first resource domain and the second resource domain are inconsistent. The step of transforming the modulated signal in the first resource domain to the second resource domain, constructed from time and frequency dimensions, includes: The modulation signal in the first resource domain is transformed into a third resource domain constructed from the time dimension and the frequency dimension to obtain the modulation signal in the third resource domain. The grid in the third resource domain has the same size as the grid in the first resource domain. The modulated signal in the third resource domain is mapped to the second resource domain constructed from the time and frequency dimensions.

5. The method as described in claim 4, characterized in that, The step of transforming the modulated signal in the first resource domain to a third resource domain constructed from the time and frequency dimensions includes: Based on the inverse Fourier transform, the modulated signal in the first resource domain is transformed into the third resource domain constructed from the time dimension and the frequency dimension.

6. The method as described in claim 5, characterized in that, The modulation signal in the second resource domain is a single-carrier signal. The step of precoding the modulation signal in the second resource domain to obtain a precoded signal corresponding to the modulation signal in the second resource domain includes: Based on the discrete Fourier transform, the modulation signal in the second resource domain is precoded in the frequency direction to obtain the precoded signal corresponding to the modulation signal in the second resource domain.

7. The method as described in claim 6, characterized in that, The signal in the second resource domain is a multicarrier signal. The step of precoding the modulated signal in the second resource domain to obtain a precoded signal corresponding to the modulated signal in the second resource domain includes: The modulation signal in the second resource domain is determined as the precoded signal corresponding to the modulation signal in the second resource domain.

8. A method for transmitting a signal, characterized in that, The method includes: Receive a transmittable signal and determine the modulation signal in a second resource domain constructed from the time and frequency dimensions corresponding to the transmittable signal; The modulation signal in the second resource domain is transformed into the first resource domain constructed by the Doppler dimension and the frequency dimension to obtain the modulation signal in the first resource domain. The modulation signal in the first resource domain is extracted, and the extracted modulation signal is decoded to obtain the bit data to be processed.

9. The method as described in claim 8, characterized in that, Determining the modulated signal in the second resource domain, constructed from the time and frequency dimensions, corresponding to the transmittable signal includes: Determine the frequency domain signal corresponding to the transmittable signal; The frequency domain signal is precoded and inversely processed to obtain the modulated signal in the second resource domain constructed from the time and frequency dimensions.

10. The method as described in claim 9, characterized in that, The grid size in the first resource domain is different from that in the second resource domain. The step of transforming the modulated signal in the second resource domain to the first resource domain, constructed from Doppler and frequency dimensions, to obtain the modulated signal in the first resource domain includes: The modulated signal in the second resource domain is mapped to a third resource domain constructed from the time and frequency dimensions, wherein the grid in the third resource domain has the same size as the grid in the first resource domain; The modulation signal in the third resource domain is transformed into the first resource domain constructed by the Doppler dimension and the frequency dimension to obtain the modulation signal in the first resource domain.

11. The method as described in claim 10, characterized in that, The step of decoding the extracted modulated signal to obtain the bit data to be processed includes: The extracted modulation signal is decoded to obtain the bit data to be processed and a first verification result, wherein the first verification result is a verification result generated by the transmitting device based on the bit data to be processed. Based on the bit data to be processed, a second verification result is generated, and based on the second verification result and the first verification result, it is determined whether the bit data to be processed has been tampered with during transmission.

12. The method as described in claim 11, characterized in that, The step of performing precoding inverse processing on the frequency domain signal to obtain the modulated signal in the second resource domain constructed from the time and frequency dimensions includes: Based on the frequency domain signal, a demodulation reference signal is obtained, and precoding weights are determined based on the demodulation reference signal. Based on the precoding weights, the frequency domain signal is subjected to equalization processing to obtain an equalized frequency domain signal, and the equalized frequency domain signal is determined as the modulation signal in the second resource domain.

13. A launching device, characterized in that, include: The encoding module is used to encode the bit data to be transmitted to obtain a modulation signal corresponding to the bit data to be transmitted. The writing module is used to write the modulated signal into a first resource domain constructed by the Doppler dimension and the frequency dimension to obtain the modulated signal in the first resource domain. The conversion module is used to transform the modulated signal in the first resource domain to a second resource domain constructed by the time dimension and the frequency dimension, so as to obtain the modulated signal in the second resource domain. The transmission module is used to determine the transmittable signal of the bit data to be transmitted based on the modulation signal in the second resource domain.

14. A receiving device, characterized in that, include: A receiving module is configured to receive a transmittable signal and determine a modulated signal in a second resource domain constructed from a time dimension and a frequency dimension corresponding to the transmittable signal. The transformation module is used to transform the modulation signal in the second resource domain to a first resource domain constructed by the Doppler dimension and the frequency dimension, so as to obtain the modulation signal in the first resource domain. The extraction module is used to extract the modulation signal in the first resource domain and decode the extracted modulation signal to obtain the bit data to be processed.

15. A readable storage medium, characterized in that, The readable storage medium stores a program or instructions which, when executed by a processor, perform the method as described in any one of claims 1-7, or the method as described in any one of claims 8-12.

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