Signal transmission method, device and program product

Abstract

The embodiment of the disclosure provides a signal transmission method, device and program product, relates to the technical field of communication, and is used for realizing the combination of an NTN wireless communication system and a SAR imaging system. The method is applied to a non-ground network node, and the method comprises the following steps: mapping a modulation symbol of a downlink communication signal to a first frequency domain resource unit of a transmission bandwidth, and mapping a frequency domain sequence of a remote sensing signal to a second frequency domain resource unit of the transmission bandwidth to obtain a communication and remote sensing integrated signal, the first frequency domain resource unit and the second frequency domain resource unit do not overlap in the frequency domain; and transmitting the communication and remote sensing integrated signal.

Description

Technical Field

[0001] This disclosure relates to the field of communication technology, and in particular to a signal transmission method, device and program product. Background Technology

[0002] In non-terrestrial network (NTN) wireless communication systems, satellites can directly connect with terminals, thereby extending the coverage of wireless communication. On one hand, satellites play a significant role in geographic remote sensing, with spaceborne synthetic aperture radar (SAR) being a crucial method in remote sensing imaging. SAR provides all-weather, 24 / 7 Earth remote sensing and offers phase information of targets, providing unique remote sensing advantages. Combining NTN wireless communication systems with SAR imaging systems can further conserve increasingly scarce spectrum resources, reduce equipment size, and provide a more powerful cost advantage for multi-functional systems. On the other hand, the combination of NTN wireless communication systems and SAR imaging systems aims to maintain communication while conducting topographic and geomorphological surveys. For example, in large-scale geological emergency rescue scenarios such as earthquakes and tsunamis, NTN wireless communication systems can provide wide-area emergency communication coverage, while the integrated NTN communication and remote sensing capabilities enable timely disaster imaging and reconnaissance. Summary of the Invention

[0003] This disclosure provides a signal transmission method, device, and program product for integrating an NTN wireless communication system with a SAR imaging system.

[0004] To achieve the above objectives, the present disclosure adopts the following technical solution.

[0005] Firstly, a signal transmission method is provided, applicable to non-terrestrial network nodes, including:

[0006] The modulation symbols of the downlink communication signal are mapped onto the first frequency domain resource unit of the transmission bandwidth, and the frequency domain sequence of the remote sensing signal is mapped onto the second frequency domain resource unit of the transmission bandwidth to obtain the integrated communication and remote sensing signal. The first frequency domain resource unit and the second frequency domain resource unit do not overlap in the frequency domain.

[0007] Send integrated communication and remote sensing signals.

[0008] Secondly, a communication device is provided for use in a non-terrestrial network node, comprising:

[0009] The processing unit is used to map the modulation symbols of the downlink communication signal onto the first frequency domain resource unit of the transmission bandwidth, and to map the frequency domain sequence of the remote sensing signal onto the second frequency domain resource unit of the transmission bandwidth to obtain an integrated communication and remote sensing signal. The first frequency domain resource unit and the second frequency domain resource unit do not overlap in the frequency domain.

[0010] The transmitting unit is used to transmit integrated communication and remote sensing signals.

[0011] Thirdly, an electronic device is provided, comprising: a processor and a memory; the memory storing processor-executable instructions; when the processor is configured to execute the instructions, causing a communication device to implement any of the methods provided in the first aspect above.

[0012] Fourthly, a computer-readable storage medium is provided that stores computer instructions that, when executed on a computer, cause the computer to perform any of the methods provided in the first aspect.

[0013] Fifthly, a computer program product comprising computer instructions is provided, which, when executed on a computer, cause the computer to perform any of the methods provided in the first aspect.

[0014] In this embodiment, the influence of the duty cycle of the remote sensing signal is taken into account. The modulation symbols of the downlink communication signal are mapped (i.e., filled) onto the first frequency domain resource unit of the transmission bandwidth, and the frequency domain sequence of the remote sensing signal is mapped onto the second frequency domain resource unit of the transmission bandwidth other than the first frequency domain resource unit (i.e., the first and second frequency domain resource units do not overlap in the frequency domain). This results in an integrated communication and remote sensing signal. This mapping method is equivalent to reconstructing and integrating the remote sensing signal in the frequency domain, so that remote sensing signals with different duty cycles can be processed and represented in a unified way in the frequency domain. Therefore, the influence of the duty cycle of the remote sensing signal can be ignored when constructing the integrated communication and remote sensing signal, realizing the integrated communication and remote sensing waveform in the NTN scenario. It can realize remote sensing while communicating, that is, realize the combination of the NTN wireless communication system and the SAR imaging system. Attached Figure Description

[0015] The accompanying drawings are provided to further understand the technical solutions of this disclosure and constitute a part of the specification. They are used together with the embodiments of this disclosure to explain the technical solutions of this disclosure and do not constitute a limitation on the technical solutions of this disclosure.

[0016] Figure 1 This is a schematic diagram of the structure of an NTN wireless communication system provided in an embodiment of the present disclosure;

[0017] Figure 2A schematic diagram of a satellite radar remote sensing provided in an embodiment of this disclosure;

[0018] Figure 3 This is a schematic diagram of the structure of a communication system provided in an embodiment of the present disclosure;

[0019] Figure 4 This is a schematic diagram of the structure of a spaceborne base station provided in an embodiment of the present disclosure;

[0020] Figure 5 A schematic flowchart of a signal transmission method provided in an embodiment of this disclosure;

[0021] Figure 6 A schematic diagram illustrating the generation process of an integrated communication and remote sensing signal provided in an embodiment of this disclosure;

[0022] Figure 7 A schematic diagram illustrating the generation process of an integrated communication and remote sensing signal provided in an embodiment of this disclosure;

[0023] Figure 8 This is a schematic diagram of a transmission beam corresponding to a communication signal and a transmission beam corresponding to a remote sensing signal, provided in an embodiment of this disclosure.

[0024] Figure 9 This is a schematic diagram of the downlink frequency signal transmission and reception timing of an integrated communication and remote sensing signal provided in an embodiment of this disclosure;

[0025] Figure 10 A schematic flowchart illustrating another signal transmission method provided in an embodiment of this disclosure;

[0026] Figure 11 This is a schematic diagram of a transmit pulse portion being set to zero, provided as an embodiment of the present disclosure;

[0027] Figure 12 This is a schematic diagram of the overall process of a signal transmission method provided in an embodiment of the present disclosure;

[0028] Figure 13 This is a schematic diagram of the composition of a communication device provided in an embodiment of the present disclosure;

[0029] Figure 14 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this disclosure. Detailed Implementation

[0030] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this disclosure.

[0031] Unless the context otherwise requires, throughout the specification and claims, the term "comprise" and other forms such as the third-person singular "comprises" and the present participle "comprising" are interpreted as open-ended and encompassing, meaning "including, but not limited to." In the description of the specification, terms such as "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific example," or "some examples" are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this disclosure. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics mentioned may be included in any suitable manner in any one or more embodiments or examples.

[0032] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0033] In this disclosure, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary" or "for example" in this disclosure should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0034] In addition, the use of “based on” implies openness and inclusivity, because processes, steps, calculations or other actions “based on” one or more of the stated conditions or values ​​may in practice be based on additional conditions or values ​​beyond those stated.

[0035] NTN refers to a ubiquitous, three-dimensional communication network that utilizes non-terrestrial communication infrastructure such as satellites and high-altitude platforms (e.g., drones, stratospheric balloons) to build a network. Figure 1 This is a schematic diagram of the structure of an NTN wireless communication system provided in an embodiment of this disclosure. See also... Figure 1NTN wireless communication systems include satellites and user equipment (UE). NTN wireless communication systems can be applied to the following scenarios:

[0036] Remote area communications: Providing voice, data and other communication services to residents in rural, mountainous, and desert areas to improve their quality of life and economic development.

[0037] IoT Applications: Supports the connection of a large number of IoT devices to realize applications such as remote environmental monitoring, agricultural monitoring, and logistics tracking.

[0038] Emergency communication support: In the event of natural disasters such as earthquakes, floods, and typhoons, communication links can be quickly established to ensure the communication needs of rescue command and affected people.

[0039] Transportation sector: Provides communication services for mobile terminals in airspace, seaspace, railways and other transportation sectors, supporting communication and positioning of vehicles, ships and aircraft during their movement.

[0040] Satellite radar remote sensing is a technology that uses a radar system mounted on a satellite to observe and detect the Earth's surface. Figure 2 The diagram shown is a schematic representation of a satellite radar remote sensing method according to an embodiment of this disclosure. See also... Figure 2 Satellite radar systems transmit microwave signals to the ground and then receive the echo signals reflected back from ground objects. By analyzing the characteristics of the echo signals, such as intensity, phase, and polarization, information about ground targets is obtained. Because microwaves have penetrating power, they can penetrate clouds, vegetation, and a certain degree of soil. Therefore, satellite radar remote sensing can be conducted under various weather conditions, unaffected by cloud cover or lighting conditions. The radar itself can be SAR (Special Radar Aspect).

[0041] Thus, on the one hand, combining the NTN wireless communication system with the SAR imaging system can further save on increasingly scarce spectrum costs and reduce equipment size, providing a more powerful cost advantage for multifunctional systems. On the other hand, the combination of the NTN wireless communication system and the SAR imaging system aims to maintain communication while conducting remote sensing of terrain and landform surveys. For example, in large-scale geological emergency rescue scenarios such as earthquakes and tsunamis, the NTN wireless communication system can provide wide-area emergency communication coverage, while the integrated NTN communication and remote sensing functions can achieve timely disaster imaging and surveying of disaster scenarios.

[0042] While related technologies propose integrated sensing waveforms, these refer specifically to integrated communication and sensing waveforms. This integration aims to merge communication and sensing functions into a single system, using the same waveform to achieve both information transmission (communication) and environmental detection (sensing). For example, the designed integrated sensing waveform must meet the data transmission rate and stability requirements of communication services like phone calls and internet access, while also being able to detect environmental information such as object position, speed, and shape. Since sensing functions and remote sensing functions are not the same, the integrated sensing waveforms proposed in these technologies may not be applicable to large-scale geological emergency rescue scenarios such as earthquakes and tsunamis.

[0043] Furthermore, due to the duty cycle of remote sensing signals, the integrated communication and remote sensing waveform generation method in related technologies may not be applicable to the generation of integrated communication and remote sensing waveforms (i.e., integrated communication and remote sensing signals) required when NTN wireless communication systems are combined with SAR imaging systems.

[0044] Therefore, how to combine the NTN wireless communication system with the SAR imaging system is an urgent problem to be solved.

[0045] Based on this, embodiments of this disclosure provide a signal transmission method, device, and program product that take into account the influence of the duty cycle of remote sensing signals. The modulation symbols of the downlink communication signal are mapped (i.e., filled) onto the first frequency domain resource unit of the transmission bandwidth, and the frequency domain sequence of the remote sensing signal is mapped onto the second frequency domain resource unit of the transmission bandwidth other than the first frequency domain resource unit (i.e., the first and second frequency domain resource units do not overlap in the frequency domain), resulting in an integrated communication and remote sensing signal. This mapping method is equivalent to reconstructing and integrating the remote sensing signal in the frequency domain, so that remote sensing signals with different duty cycles can be processed and represented in a unified manner in the frequency domain. Thus, the influence of the duty cycle of the remote sensing signal can be ignored when constructing the integrated communication and remote sensing signal, realizing the integrated communication and remote sensing waveform in the NTN scenario, enabling remote sensing to be achieved while communicating, that is, realizing the combination of the NTN wireless communication system and the SAR imaging system.

[0046] The technical solutions provided in this disclosure can be applied to scenarios that require communication and remote sensing, such as emergency rescue scenarios, including large-scale geological emergency rescue scenarios like earthquakes and tsunamis.

[0047] The embodiments of this disclosure will now be described in conjunction with the accompanying drawings.

[0048] It should be understood that the specific implementations described herein are for interpreting this disclosure only and are not intended to limit this disclosure.

[0049] The technical solutions provided in this disclosure can be applied to various mobile communication networks, such as 5G new radio (NR) mobile communication networks, future mobile communication networks, such as 6G mobile communication networks, or multiple communication convergence systems, etc. This disclosure does not limit them.

[0050] Combination Figure 1 and Figure 2 The diagram shown is as follows. Figure 3 The diagram shown is a structural schematic of a communication system provided in an embodiment of this disclosure. Figure 3 As shown, the communication system includes, but is not limited to, multiple satellites (e.g., satellite 11, satellite 12 and satellite 13), a ground control center 20, and multiple terminals (e.g., terminal 31 and terminal 32).

[0051] For each of the multiple satellites, such as satellite 11, the satellite can be a high-orbit satellite, a medium-orbit (MEO) satellite, or a low-orbit (LEO) satellite, etc., and this disclosure does not limit this.

[0052] In some embodiments, the multiple satellites can be satellites of a non-terrestrial communication network, which is a communication network that utilizes high-altitude or high-sky platforms. The main characteristic of a non-terrestrial communication network is that it does not rely on traditional ground infrastructure. These high-altitude or high-sky platforms include communication satellites, satellite networks, drones, high-altitude airships, etc. High-sky platforms are typically equipped with radio frequency resources, enabling them to provide wide-area or global coverage, thereby meeting the needs of areas that traditional terrestrial networks cannot cover.

[0053] In some embodiments, satellites are connected to each other via inter-satellite links, which may be microwave or laser links.

[0054] In some embodiments, the satellite carries an onboard base station, which is used to transmit integrated communication and remote sensing waveforms for downlink communication and radar remote sensing, and to receive echoes from the target by switching between transmit and receive on the downlink frequency, while uplink reception on another frequency is unaffected.

[0055] Among them, such as Figure 4 The diagram shown is a structural schematic of a spaceborne base station provided in an embodiment of this disclosure. (See also...) Figure 4The spaceborne base station module includes: an integrated waveform generation module, a waveform storage module, a communication transmission module, a radar transmission module, an antenna array module, a communication receiving module, an uplink demodulation module, a radar receiving module, a radar data acquisition and pulse compression module, and a data return module. The integrated waveform generation module generates integrated communication and remote sensing waveforms, including a fixed-sequence full-bandwidth filling operation. The waveform storage module, due to the randomness of communication signals, needs to store each transmitted integrated communication and remote sensing waveform for matched filtering; after matched filtering, the corresponding waveform's memory can be released. The communication transmission module weights the integrated communication and remote sensing waveform according to the indicated communication transmission power and then modulates it onto the corresponding communication beam direction. The radar transmission module... The system performs weighted sampling and then modulates the signal onto the corresponding radar beam direction; an antenna array module is used to form the transmit and receive beams; a communication receiving module is used to receive uplink communication signals; an uplink demodulation module is used to demodulate the received uplink communication signals; a radar receiving module is used for directional reception of radar echoes (i.e., remote sensing signals); a radar data acquisition and pulse compression module is used for acquiring radar complex baseband signals and performing matched filtering and pulse compression operations; and a data return module is used to package the demodulated uplink communication information and the acquired radar signals for transmission back to the ground.

[0056] In some embodiments, the ground control center 20 can connect to the satellite via a gateway station. The gateway station is used to connect to the satellite via a feed link, which can be a microwave link. The gateway station is deployed on the ground and connected to a terrestrial network. The terrestrial network is a network composed of routers or transmission equipment.

[0057] In some embodiments, the ground control center 20 may be a device or server with satellite data processing and satellite selection functions, such as a cloud server or a network server. The ground control center 20 may be a global ground control center or a local ground control center. The ground control center 20 may be a single server, a server cluster consisting of multiple servers, or a cloud computing service center.

[0058] In some embodiments, the ground control center 20 may also be referred to as a control center, a satellite selection device, a satellite selection server, etc., without limitation.

[0059] In some embodiments, for each of the multiple terminals, such as terminal 31, the terminal includes a terminal capable of communication based on a satellite network. The terminal can be a fixed-location terminal, a personal handheld satellite mobile terminal (e.g., a satellite phone, Iridium phone, etc.), a vehicle-mounted mobile terminal (e.g., a vehicle-mounted satellite phone, etc.), an airborne mobile terminal on an aircraft, or any mobile terminal flying within the atmosphere, such as a drone, airship, or balloon. This disclosure does not impose any special limitations on the specific form of the terminal. In this disclosure, the device for implementing the terminal's function can be the terminal itself, or a device that supports the terminal in implementing that function (e.g., a chip system within the terminal).

[0060] It should be understood that Figure 3 This is an exemplary structural diagram. Figure 3 The number of devices included in the illustrated communication system is unlimited; for example, the number of satellites and terminals is unlimited. Furthermore, except... Figure 3 In addition to the equipment shown, Figure 3 The communication system shown may also include other devices, which are not limited thereto.

[0061] Next, as Figure 5 As shown, this disclosure provides a signal transmission method that can be applied to non-terrestrial network nodes, which can be the aforementioned... Figure 3 For any one of the multiple satellites shown, such as satellite 11, the method may include the following steps:

[0062] S101. The modulation symbols of the downlink communication signal are mapped onto the first frequency domain resource unit of the transmission bandwidth, and the frequency domain sequence of the remote sensing signal is mapped onto the second frequency domain resource unit of the transmission bandwidth to obtain the integrated communication and remote sensing signal.

[0063] In some embodiments, when both communication and remote sensing are required, a non-terrestrial network node acquires downlink communication signals and remote sensing signals, and then maps the modulation symbols of the downlink communication signals onto a first frequency domain resource unit of the transmission bandwidth, and maps the frequency domain sequence of the remote sensing signals onto a second frequency domain resource unit of the transmission bandwidth, to obtain an integrated communication and remote sensing signal.

[0064] The first and second frequency domain resource units do not overlap in the frequency domain. In other words, the frequency domain resource units occupied by the downlink communication signal in the transmission bandwidth do not overlap with the frequency domain resource units occupied by the remote sensing signal in the transmission bandwidth.

[0065] The integrated communication and remote sensing signal may also have other names, such as integrated communication and remote sensing waveform, integrated communication and radar signal, integrated radar and communication signal, integrated sensing signal, etc. This disclosure does not limit this.

[0066] It should be understood that communication does not necessarily schedule all available frequency domain resources; therefore, some frequency units in the downlink communication signal may be unused. In some embodiments, after acquiring the downlink communication signal and the remote sensing signal, the non-terrestrial network node determines the first frequency domain resource unit occupied by the downlink communication signal in the transmission bandwidth based on the modulation symbol of the downlink communication signal. Then, it determines the second frequency domain resource unit occupied by the remote sensing signal from the available frequency domain resource units in the transmission bandwidth, excluding the first frequency domain resource unit. The non-terrestrial network node can then map (i.e., fill) the modulation symbol of the downlink communication signal onto the first frequency domain resource unit of the transmission bandwidth, and map (i.e., fill) the frequency domain sequence of the remote sensing signal onto the second frequency domain resource unit of the transmission bandwidth to obtain an integrated communication and remote sensing signal.

[0067] The determination of the second frequency domain resource unit can include the following methods.

[0068] Method 1: Before mapping the frequency domain sequence of the remote sensing signal onto the second frequency domain resource unit of the transmission bandwidth, the non-terrestrial network node determines the second frequency domain resource unit from the available frequency domain resource units other than the first frequency domain resource unit in the frequency domain resource unit of the transmission bandwidth based on the required range resolution of the remote sensing signal. The available frequency domain resource unit includes available frequency units.

[0069] In Method 1, the available frequency domain resource units on the transmission bandwidth corresponding to all symbols that are not occupied by the modulation symbols of the downlink communication signals are filled according to the required range resolution of the remote sensing signal (without filling the guard sidebands). The filling is the frequency domain sequence of the remote sensing signal. The frequency domain sequence can be a fixed frequency domain sequence, including a constant-modulus ZC sequence. Furthermore, the power of each available frequency domain resource unit can be set to be equal to the average power of each frequency domain resource unit of all downlink communication signals.

[0070] In some embodiments, the correspondence between the required range resolution of the remote sensing signal and the second frequency domain resource unit can be shown by the following formula:

[0071] B = c / (2×δR);

[0072] Where B is the second frequency domain resource unit (i.e., the bandwidth filled by the remote sensing signal), c is the speed of light, and δR is the required distance resolution.

[0073] It should be understood that different remote sensing application scenarios have different requirements for range resolution. For example, high range resolution is needed when monitoring small targets at close range, while the requirement for range resolution is relatively low when monitoring large geographical areas. Based on the second frequency domain resource unit obtained by method 1, system parameters can be flexibly adjusted to ensure the communication system achieves optimal performance in different application scenarios. Furthermore, spectrum resources are limited in communication systems. The modulation symbols of downlink communication signals typically do not occupy the entire transmission bandwidth, leaving some unused frequency domain resource units. By filling these available frequency domain resource units, these idle spectrum resources can be fully utilized, improving spectrum utilization.

[0074] Method 2: The second frequency domain resource unit includes all available frequency domain resource units in the transmission bandwidth frequency domain resource unit other than the first frequency domain resource unit. That is, after determining the first frequency domain resource unit, all available frequency domain resource units in the transmission bandwidth frequency domain resource unit other than the first frequency domain resource unit are determined as the second frequency domain resource unit.

[0075] In Method 2, that is, if it is desired that the remote sensing signal obtains the resolution corresponding to the full bandwidth of the transmission bandwidth, a fixed frequency domain sequence is used to fill all available frequency domain resource units in the frequency domain resource units of the transmission bandwidth except for the first frequency domain resource unit (without filling the guard sideband).

[0076] In this way, remote sensing signals can obtain the resolution corresponding to the full bandwidth of the transmission bandwidth, which can improve the accuracy of target recognition and enhance the ability to detect weak targets.

[0077] As a possible example, the process of mapping the modulation symbols of the downlink communication signal to the first frequency domain resource unit of the transmission bandwidth, and mapping the frequency domain sequence of the remote sensing signal to the second frequency domain resource unit of the transmission bandwidth, to obtain the integrated communication and remote sensing signal can be as follows: Figure 6 As shown. Figure 6 This is a schematic diagram illustrating the generation process of an integrated communication and remote sensing signal provided in an embodiment of this disclosure. (See attached diagram.) Figure 6First, the downlink communication symbols (i.e., the modulation symbols of the downlink communication signal) are determined to include d-UE0,0, d-UE0,1, d-UE0,2, d-UE1,0, and d-UE1,1. The corresponding first frequency domain resource units occupied are RE-3, RE-4, RE-5, RE-(N-5), and RE-(N-4). This means mapping the modulation symbols of the downlink communication signal onto the first frequency domain resource units of the transmission bandwidth. The frequency domain resource units required by the remote sensing signal include RE-(N-6) to RE-(N-3). Since RE-(N-5) and RE-(N-4) have already been occupied by the downlink communication symbols, the second frequency domain resource units required by the remote sensing signal include RE-(N-6) and RE-(N-3). Then, the fixed frequency domain sequences corresponding to RE-(N-6) and RE-(N-3) are mapped onto the second frequency domain resource units of the transmission bandwidth to obtain the bandwidth-filled radar-communication integrated signal (i.e., the communication-remote sensing integrated signal).

[0078] The above embodiments illustrate an integrated communication and remote sensing signal generation process in scenarios requiring both communication and remote sensing. In some embodiments, in scenarios where communication is not required but remote sensing is needed, such as... Figure 7 The diagram shown illustrates another process for generating integrated communication and remote sensing signals according to an embodiment of this disclosure. (See attached diagram.) Figure 7 One approach is to fill a continuous frequency range of available frequency cells on all symbols using a frequency domain sequence of the remote sensing signal (without filling the guard band). Alternatively, if the goal is to achieve the full bandwidth resolution of the remote sensing signal, a fixed frequency domain sequence of the remote sensing signal is used to fill all available frequency cells on all symbols (without filling the guard band), resulting in an integrated communication and remote sensing signal.

[0079] In some embodiments, in scenarios where communication is required but remote sensing is not, no padding is applied to any symbols for the transmission bandwidth.

[0080] The above process is for reference only. Figure 6 and Figure 7 It is important to note that if a symbol is not scheduled for downlink communication at all, it still needs to be filled in when remote sensing functionality is required, ensuring that the total number of transmitted communication symbols (N) within each pulse repetition interval (PRI) is maintained. sym +N DMRS They are all the same. For downlink communication receiving terminals, the information from the scheduling part can be extracted and demodulated during reception.

[0081] In some embodiments, the generated integrated communication and remote sensing signal needs to be stored and then used to receive the integrated communication and remote sensing signal after matched filtering. The memory occupied by the integrated communication and remote sensing signal can then be released.

[0082] S102, Send integrated communication and remote sensing signals.

[0083] In some embodiments, after obtaining the integrated communication and remote sensing signal, non-terrestrial network nodes can transmit the integrated communication and remote sensing signal. Since the communication target area may differ from the SAR imaging area, the integrated communication and remote sensing signal can be weighted differently using the transmission power of the indicated communication signal and the transmission power of the remote sensing signal, and further transmitted simultaneously using two different beams.

[0084] As an example, transmitting integrated communication and remote sensing signals includes:

[0085] Transmitting integrated communication and remote sensing signals based on the transmit beam and transmit power corresponding to the downlink communication signal; and transmitting integrated communication and remote sensing signals based on the transmit beam and transmit power corresponding to the remote sensing signal.

[0086] Among them, the transmission of integrated communication and remote sensing signals based on the transmit beam and transmit power corresponding to the downlink communication signal includes:

[0087] The integrated communication and remote sensing signal is modulated based on the beam vector corresponding to the transmit beam of the downlink communication signal and the transmit amplitude weight corresponding to the transmit power to obtain the communication transmit signal; the communication transmit signal is then transmitted.

[0088] Transmitting integrated communication and remote sensing signals based on the transmit beam and transmit power corresponding to the remote sensing signal includes: modulating the integrated communication and remote sensing signal based on the beam vector corresponding to the transmit beam and the transmit amplitude weight corresponding to the transmit power to obtain the remote sensing transmit signal; and transmitting the remote sensing transmit signal.

[0089] Figure 8 This diagram illustrates a transmission beam corresponding to a communication signal and a transmission beam corresponding to a remote sensing signal, provided in an embodiment of this disclosure. Figure 8 It can be seen that the directions of the transmission beams corresponding to communication signals and remote sensing signals can be different.

[0090] The following example illustrates the transmission of integrated communication and remote sensing signals.

[0091] Let the integrated communication and remote sensing signal of the i-th pulse repetition period be s. i (t), since the coverage areas of communication signals and remote sensing signals may differ, power and beam pointing of communication signals and remote sensing signals can be allocated according to requirements, i.e.:

[0092] s c,i (t) = w c,tx ×A c ×si (t);

[0093] s r,i (t) = w r,tx ×A r ×s i (t);

[0094] Among them, s c,i (t) represents the communication transmission signal (also known as the communication transmission array signal), s r,i (t) represents the remote sensing transmitted signal (also known as the remote sensing array signal); w c,tx The beam vector corresponding to the transmit beam of the downlink communication signal (which can be simply referred to as the communication transmit beam vector), w r,tx A is the beam vector corresponding to the transmitted beam of the remote sensing signal (which can be simply referred to as the remote sensing transmitted beam vector). c A is the transmit amplitude weight corresponding to the transmit power of the downlink communication signal (which can be simply referred to as the communication transmit amplitude weight). r This refers to the transmission amplitude weight corresponding to the transmission power of the remote sensing signal (which can be simply called the remote sensing transmission amplitude weight). The square of the communication transmission amplitude weight corresponds to the communication transmission power weight P. c The square of the remote sensing transmission amplitude weight corresponds to the remote sensing transmission power weight P. r ,Right now:

[0095] P c =A c 2 ;

[0096] P r =A r 2 ;

[0097] As an example, transmitting integrated communication and remote sensing signals includes: transmitting integrated communication and remote sensing signals based on the transmission timing of the integrated communication and remote sensing signals, wherein the transmission timing is determined based on at least one of the following: pulse repetition interval, pulse transmission width, signal transmission and reception switching time, and radar transmission and reception offset cycle number.

[0098] Among them, at least one of the pulse repetition interval, pulse transmission width, signal transmission and reception switching time, and radar transmission and reception offset cycle number is determined based on the synthetic aperture radar azimuth resolution, range swath width, and communication rate.

[0099] The signal transmission and reception timing of the downlink frequency point of the integrated communication and remote sensing signal (including the transmission timing of the integrated communication and remote sensing signal) is as follows: Figure 9 As shown, the pulse repetition interval PRI and the pulse emission width T are visible. pOnce the four parameters—transmit / receive switching time T0, radar transmit / receive offset cycle number N—are determined, the transmit / receive timing sequence can be determined based on these four parameters. Within one pulse repetition interval, the first pulse is transmitted within the pulse transmission time window, and the window length is the pulse transmission width T. p Then the radio frequency switches to the receiving state. The radio frequency switching time from transmission to reception is T0, and the reception window duration after switching to the receiving state is PRI-T. p -2T0, after the receive window ends, the radio frequency switches to the transmit state, and the radio frequency switching time from receive to transmit is T0. The above process is repeated periodically according to the pulse repetition interval PRI, and the echo of the transmitted pulse in the i-th cycle is received in the receive window of the i+N-th cycle. Pulse repetition interval PRI, pulse transmission width T p The four parameters—transmit / receive switching time T0, radar transmit / receive offset cycle number N—need to be comprehensively considered based on factors such as the desired SAR azimuth resolution, range swath width, and communication rate. The specific methods for determining these parameters can be found in related technical descriptions and will not be described here. In this embodiment, the transmitted signal (including communication transmitted signals and remote sensing transmitted signals) pulse contains N... sym One data symbol, N DMRS There are 1 pilot symbol, and the duration of each symbol is T. sym The length of a single-symbol cyclic prefix (CP) is T. CP Pulse emission width T p The parameters mentioned above are related as follows:

[0100] T p =(N sym +N DMRS )×(T sym +T CP );

[0101] N within each pulse repetition interval sym N DMRS T sym T CP取值 All are fixed and identical. This disclosure specifies that a single-stream downlink transmission is used in the integrated communication and remote sensing mode. The downlink communication peak rate supported by the signal transmission and reception timing at the downlink frequency point in this disclosure embodiment is shown in the following formula:

[0102] N sym ×M data ×Q m,max ×C max ×PRF(bps);

[0103] Where, N sym The number of communication data symbols transmitted within each pulse repetition interval, M data Q is the number of subcarriers carrying data on a single symbol. m,maxThe maximum transmission modulation order is denoted by , and the PRF is the highest transmission code rate.

[0104] based on Figure 5 The embodiments shown in this disclosure provide a signal transmission method, device, and program product. Taking into account the influence of the duty cycle of remote sensing signals, the modulation symbols of downlink communication signals are mapped (i.e., filled) onto a first frequency domain resource unit of the transmission bandwidth, and the frequency domain sequence of remote sensing signals is mapped onto a second frequency domain resource unit other than the first frequency domain resource unit of the transmission bandwidth (i.e., the first and second frequency domain resource units do not overlap in the frequency domain), resulting in an integrated communication and remote sensing signal. This mapping method is equivalent to reconstructing and integrating the remote sensing signal in the frequency domain, so that remote sensing signals with different duty cycles can be processed and represented in a unified manner in the frequency domain. Therefore, the influence of the duty cycle of the remote sensing signal can be ignored when constructing the integrated communication and remote sensing signal, realizing the integrated communication and remote sensing waveform in the NTN scenario, enabling remote sensing to be achieved while communicating, that is, realizing the combination of the NTN wireless communication system and the SAR imaging system.

[0105] In some embodiments, after transmitting the integrated communication and remote sensing signal, the non-terrestrial network node switches its downlink frequency to receiving mode to receive radar echoes. Based on this, in some embodiments, such as... Figure 10 As shown, after step S102, the method may further include the following steps:

[0106] S201, Receive the echo signal corresponding to the remote sensing signal.

[0107] As an example, the transmitting beam corresponding to the remote sensing signal is determined as the receiving beam for receiving the echo signal; the echo signal corresponding to the remote sensing signal is received based on the receiving beam.

[0108] It should be understood that, since imaging remote sensing is performed only on the area illuminated by the radar's transmitted beam, the same beam as the transmitted remote sensing signal is used as the receiving beam for the echo signal to receive the signal echo within the radar's transmission coverage area. For the echo of the transmitted signal in the i-th pulse repetition period, its discretely sampled received echo can be expressed as shown in the following formula:

[0109] y r,i (n) = w T r,rx ×r r,i (n);

[0110] Among them, w r,rx Let w be the received beam vector of the remote sensing signal. r,rx =w r,tx ;r r,i (n) represents the received echo on each array element.

[0111] It should be understood that determining the transmitting beam corresponding to the remote sensing signal as the receiving beam for receiving the echo signal can reduce the interference of the echo signal of the communication signal on the echo signal of the remote sensing signal and improve the accuracy of receiving the echo signal corresponding to the remote sensing signal.

[0112] S202. Perform matched filtering on the echo signal to obtain the processed echo signal.

[0113] It should be understood that pulse compression can be achieved by performing matched filtering on the echo signal.

[0114] As an example, the echo signal y of the transmitted signal in the i-th pulse repetition period is first constructed. r,i A matched filter of size (n). Retrieve the discrete waveform s of the transmitted signal during the i-th pulse repetition period from memory. i (n), reference Figure 11 The diagram shown illustrates the partial nulling of the transmitted pulse. It sets the signal samples of the cyclic prefix (CP) and the trailing CP length LCP in each symbol of the signal to 0, obtaining the partially nulled waveform s. h,i If (n), then the matched filter for the echo signal is shown in the following formula:

[0115] h i (n)=s * h,i (-n);

[0116] Using the partially zeroed waveform s h,i (n) Constructing a matched filter can avoid the introduction of false targets by the repetitive characteristics of CP.

[0117] The matched filtering operation for the echo can be performed as shown in the following formula:

[0118] x r,i (n)=conv{y r,i (n),h i (n)};

[0119] Here, conv is a linear convolution operation. The time width of the output signal after matched filtering is 1 / B, where B is the transmit signal bandwidth, thus achieving pulse time width compression. The corresponding compressed range resolution is c / (2B).

[0120] It should be noted that, Figure 11 The schematic diagram of the transmit pulse being partially zeroed is illustrated using the 2-symbol example, and is used to construct the receive matched filter.

[0121] S203. Compress the processed echo signal and uplink demodulated data to obtain a data packet.

[0122] S204, Send data packet.

[0123] During the above process, the uplink communication reception on another frequency point remains unaffected. After the uplink communication data demodulation is completed, it can be integrated and compressed together with the echo signal collected by the radar to form a data packet and sent back to the ground for further processing.

[0124] As an example, non-terrestrial network nodes to Figure 3 The ground control center 20 sends data packets.

[0125] This disclosure provides a signal transmission method based on a frequency division duplexing (FDD) system. Through signal multiplexing and timing design, it simultaneously achieves communication and SAR imaging functions, enabling remote sensing of terrain and landforms during communication. For example, in large-scale geological emergency rescue scenarios such as earthquakes and tsunamis, NTN can provide wide-area emergency communication coverage, while the integrated communication and remote sensing function of NTN enables timely disaster imaging and reconnaissance. Furthermore, it further saves on increasingly scarce spectrum resources, reduces equipment size, and provides a more powerful cost advantage for multi-functional systems.

[0126] The technical solution provided in this disclosure consists of five main steps, as described above. Figure 12 The following is a schematic diagram of the overall process of a signal transmission method provided in the disclosed embodiment: First, parameters such as the pulse repetition interval are determined to determine the signal transmission and reception timing on the downlink frequency. Second, an integrated communication and remote sensing waveform is generated for transmission. A fixed sequence is directly filled into the idle frequency resources of the communication scheduling to form an integrated waveform, and the waveform is stored for matched filtering during reception. Third, power allocation and beam modulation are performed on the integrated communication and remote sensing waveform for both communication and radar functions. Fourth, after transmitting the integrated communication and remote sensing waveform, the downlink frequency is switched to the receiving state, and the receiving beam is used to receive the echo within the area illuminated by the radar transmitting beam, which is the area of ​​interest for remote sensing. Fifth, the received radar echo is collected and matched filtering is performed using the corresponding transmitted waveform stored in the database to achieve pulse compression. After the matched filtering is completed, the memory of the corresponding waveform can be released. Sixth, the reception and demodulation of the uplink communication signal on another frequency remains unaffected throughout the above process. The demodulated uplink data and the collected radar echo can be integrated and compressed into a data packet for transmission back to the ground for further processing.

[0127] Based on the above description, the signal transmission method (also known as the integrated communication and remote sensing signal generation method) provided in this disclosure can achieve remote sensing while communicating. Firstly, based on the FDD communication system, downlink signals are transmitted periodically at equal time intervals with a certain duty cycle, thus combining with a pulse-based radar. For downlink transmission periods when frequency domain resources are not fully utilized, a fixed sequence is used to fill the frequency domain resources to construct a remote sensing transmission signal, thereby providing sufficient transmission bandwidth to achieve high range resolution. Since the communication pointing area may differ from the SAR imaging area, the integrated communication and remote sensing signal can be weighted differently using the indicated communication power and remote sensing power, and further transmitted simultaneously using two different beams. After the integrated communication and remote sensing signal transmission is completed, the receiver switches to receiving mode, where downlink echoes can be received within the receiving window. The echo signal of the remote sensing signal can be received using a remote sensing receiving beam pointing in the same direction as the remote sensing transmission beam. Since the remote sensing transmission signal is known, the receiver can construct a matched filter using the corresponding transmitting signal to perform matched filtering pulse compression. The above method allows for the acquisition and processing of pulse-based radar remote sensing imaging data without affecting uplink communication, at the expense of downlink speed.

[0128] The foregoing primarily describes the solutions provided in this disclosure from the perspective of interactions between various nodes. It is understood that each node, such as a non-terrestrial network node, includes corresponding hardware structures and / or software modules to perform the aforementioned functions. Those skilled in the art should readily recognize that, based on the algorithmic steps of the examples described in conjunction with the embodiments disclosed herein, this disclosure can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed in hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this disclosure.

[0129] This disclosure embodiment can divide non-terrestrial network nodes into functional modules according to the above method embodiment. For example, each function can be divided into a separate functional module, or two or more functions can be integrated into one functional module. The integrated module can be implemented in hardware or software. It should be noted that the module division in this disclosure embodiment is illustrative and only represents one logical functional division. In actual implementation, there may be other division methods. The following description uses the example of dividing each functional module according to each function.

[0130] Figure 13 This is a schematic diagram illustrating the composition of a communication device provided in an embodiment of this disclosure. Figure 13 As shown, the communication device 30 includes a processing unit 301 and a transmitting unit 302. In some embodiments, the communication device 30 further includes a receiving unit 303.

[0131] The communication device 30 can be a chip in the aforementioned non-terrestrial network node. When the communication device 30 is used to implement the functions of the non-terrestrial network node in the above embodiments, each unit is specifically used to implement the following functions.

[0132] The processing unit 301 is used to map the modulation symbols of the downlink communication signal onto the first frequency domain resource unit of the transmission bandwidth, and to map the frequency domain sequence of the remote sensing signal onto the second frequency domain resource unit of the transmission bandwidth to obtain an integrated communication and remote sensing signal. The first frequency domain resource unit and the second frequency domain resource unit do not overlap in the frequency domain.

[0133] The transmitting unit 302 is used to transmit integrated communication and remote sensing signals.

[0134] In some embodiments, the processing unit 301 is further configured to determine a second frequency domain resource unit from the available frequency domain resource units other than the first frequency domain resource unit in the frequency domain resource units of the transmission bandwidth, based on the distance resolution required by the remote sensing signal.

[0135] In some embodiments, the transmitting unit 302 is specifically configured to transmit an integrated communication and remote sensing signal based on the transmit beam and transmit power corresponding to the downlink communication signal; and

[0136] Based on the transmission beam and transmission power corresponding to the remote sensing signal, an integrated communication and remote sensing signal is transmitted.

[0137] In some embodiments, the transmitting unit 302 is specifically used to modulate the integrated communication and remote sensing signal based on the beam vector corresponding to the transmit beam of the downlink communication signal and the transmit amplitude weight corresponding to the transmit power, so as to obtain the communication transmit signal.

[0138] Send communication transmission signals.

[0139] In some embodiments, the transmitting unit 302 is specifically used to modulate the integrated communication and remote sensing signal based on the beam vector corresponding to the transmitting beam of the remote sensing signal and the transmitting amplitude weight corresponding to the transmitting power, so as to obtain the remote sensing transmitting signal.

[0140] Send remote sensing transmission signals.

[0141] In some embodiments, the transmitting unit 302 is specifically used to transmit the integrated communication and remote sensing signal based on the transmission timing of the integrated communication and remote sensing signal, wherein the transmission timing is determined based on at least one of the following: pulse repetition interval, pulse transmission width, signal transmission and reception switching time, and radar transmission and reception offset cycle number.

[0142] In some embodiments, the receiving unit 303 is used to receive the echo signal corresponding to the remote sensing signal;

[0143] Processing unit 301 is also used to perform matched filtering on the echo signal to obtain the processed echo signal; and to compress the processed echo signal and the uplink demodulated data to obtain a data packet.

[0144] The sending unit 302 is also used to send data packets.

[0145] In some embodiments, the receiving unit 303 is specifically used to determine that the transmitting beam corresponding to the remote sensing signal is the receiving beam for receiving the echo signal; and to receive the echo signal corresponding to the remote sensing signal based on the receiving beam.

[0146] It should be noted that, Figure 13 The units within can also be called modules; for example, a transmitting unit can be called a transmitting module. Additionally, in... Figure 13 In the embodiments shown, the names of the various units may not be the same as those shown in the figures. For example, the transmitting unit may also be called the communication unit, and the receiving unit may also be called the communication unit.

[0147] Figure 13 If the various units in the present disclosure are implemented as software functional modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the embodiments of this disclosure, in essence, or the parts that contribute to the prior art, or all or part of the technical solutions, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute all or part of the steps of the methods of the various embodiments of this disclosure. Storage media for storing computer software products include various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0148] When the communication device 30 implements the functions of the integrated module in hardware, this disclosure provides a schematic diagram of the structure of an electronic device. For example... Figure 14 As shown, the electronic device 40 includes: a processor 402, a communication interface 403, and a bus 404. Optionally, the electronic device 40 may also include a memory 401.

[0149] Processor 402 may implement or execute various exemplary logic blocks, modules, and circuits described in connection with embodiments of this disclosure. Processor 402 may be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute various exemplary logic blocks, modules, and circuits described in connection with embodiments of this disclosure. Processor 402 may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc.

[0150] Communication interface 403 is used to connect to other devices via a communication network. This communication network can be Ethernet, wireless access network, wireless local area network (WLAN), etc.

[0151] The memory 401 may be a read-only memory (ROM) or other type of static storage device capable of storing static information and instructions, random access memory (RAM) or other type of dynamic storage device capable of storing information and instructions, or electrically erasable programmable read-only memory (EEPROM), disk storage medium or other magnetic storage device, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but is not limited thereto.

[0152] In one possible implementation, the memory 401 can exist independently of the processor 402. The memory 401 can be connected to the processor 402 via a bus 404 and is used to store instructions or program code. When the processor 402 calls and executes the instructions or program code stored in the memory 401, it can implement the signal transmission method provided in the embodiments of this disclosure.

[0153] In another possible implementation, the memory 401 can also be integrated with the processor 402.

[0154] Bus 404 can be an extended industry standard architecture (EISA) bus, etc. Bus 404 can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 14 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0155] Through the above description of the implementation methods, those skilled in the art can clearly understand that, for the sake of convenience and brevity, only the division of the above functional modules is used as an example. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the base station or terminal can be divided into different functional modules to complete all or part of the functions described above.

[0156] This disclosure also provides a computer-readable storage medium. All or part of the processes in the above method embodiments can be executed by computer instructions instructing related hardware. The program can be stored in the computer-readable storage medium, and when executed, it can include the processes described in the above method embodiments. The computer-readable storage medium can also be an external storage device for the non-terrestrial network node, such as a plug-in hard drive, smart media card (SMC), secure digital (SD) card, flash card, etc., equipped on the non-terrestrial network node. Further, the computer-readable storage medium can include both internal storage units and external storage devices of the non-terrestrial network node. The computer-readable storage medium is used to store the computer program and other programs and data required by the non-terrestrial network node. The computer-readable storage medium can also be used to temporarily store data that has been output or will be output.

[0157] This disclosure also provides a computer program product comprising computer instructions that, when executed on a computer, cause the computer to perform any of the signal transmission methods provided in the above embodiments.

[0158] Although this disclosure has been described herein in conjunction with various embodiments, those skilled in the art will understand and implement other variations of the disclosed embodiments by reviewing the accompanying drawings, the disclosure, and the appended claims in carrying out the claimed disclosure. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude a plurality. A single processor or other unit can implement several functions listed in the claims. While different dependent claims may recite certain measures, this does not mean that these measures cannot be combined to produce a good effect.

[0159] Although this disclosure has been described in conjunction with specific features and embodiments, it will be apparent that various modifications and combinations can be made therein without departing from the spirit and scope of this disclosure. Accordingly, this specification and drawings are merely exemplary illustrations of the disclosure as defined by the appended claims and are to be considered as covering any and all modifications, variations, combinations, or equivalents within the scope of this disclosure. It is obvious that those skilled in the art can make various alterations and modifications to this disclosure without departing from its spirit and scope. Thus, this disclosure is also intended to include any such modifications and modifications that fall within the scope of the claims of this disclosure and their equivalents.

[0160] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any changes or substitutions within the technical scope disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A signal transmission method, characterized in that, Applied to non-terrestrial network nodes, the method includes: The modulation symbols of the downlink communication signal are mapped onto the first frequency domain resource unit of the transmission bandwidth, and the frequency domain sequence of the remote sensing signal is mapped onto the second frequency domain resource unit of the transmission bandwidth to obtain an integrated communication and remote sensing signal. The first frequency domain resource unit and the second frequency domain resource unit do not overlap in the frequency domain. The integrated communication and remote sensing signal is transmitted.

2. The method according to claim 1, characterized in that, Before mapping the frequency domain sequence of the remote sensing signal onto the second frequency domain resource unit of the transmission bandwidth, the method further includes: Based on the required distance resolution of the remote sensing signal, the second frequency domain resource unit is determined from the available frequency domain resource units other than the first frequency domain resource unit in the frequency domain resource units of the transmission bandwidth.

3. The method according to claim 1, characterized in that, The second frequency domain resource unit includes all available frequency domain resource units in the frequency domain resource unit of the transmission bandwidth, excluding the first frequency domain resource unit.

4. The method according to claim 1, characterized in that, The frequency domain sequence includes the ZC sequence.

5. The method according to claim 1, characterized in that, The transmission of the integrated communication and remote sensing signal includes: The integrated communication and remote sensing signal is transmitted based on the transmit beam and transmit power corresponding to the downlink communication signal; and... The integrated communication and remote sensing signal is transmitted based on the transmission beam and transmission power corresponding to the remote sensing signal.

6. The method according to claim 5, characterized in that, The transmission of the integrated communication and remote sensing signal based on the transmit beam and transmit power corresponding to the downlink communication signal includes: The integrated communication and remote sensing signal is modulated based on the beam vector corresponding to the transmit beam of the downlink communication signal and the transmit amplitude weight corresponding to the transmit power to obtain the communication transmit signal. Send the communication transmission signal.

7. The method according to claim 5, characterized in that, The transmission of the integrated communication and remote sensing signal based on the transmission beam and transmission power corresponding to the remote sensing signal includes: The integrated communication and remote sensing signal is modulated based on the beam vector corresponding to the transmitted beam of the remote sensing signal and the transmitted amplitude weight corresponding to the transmitted power to obtain the remote sensing transmitted signal. Send the remote sensing transmission signal.

8. The method according to claim 1, characterized in that, The transmission of the integrated communication and remote sensing signal includes: The integrated communication and remote sensing signal is transmitted based on the transmission timing of the integrated communication and remote sensing signal, wherein the transmission timing is determined based on at least one of the following: pulse repetition interval, pulse transmission width, signal transmission and reception switching time, and radar transmission and reception offset cycle number.

9. The method according to claim 8, characterized in that, At least one of the pulse repetition interval, pulse transmission width, signal transmit / receive switching time, and radar transmit / receive offset cycle number is determined based on the synthetic aperture radar's azimuth resolution, range swath width, and communication rate.

10. The method according to any one of claims 1 to 9, characterized in that, The method further includes: Receive the echo signal corresponding to the remote sensing signal; The echo signal is subjected to matched filtering to obtain the processed echo signal; The processed echo signal and uplink demodulated data are compressed to obtain a data packet; Send the data packet.

11. The method according to claim 10, characterized in that, The receiving of the echo signal corresponding to the remote sensing signal includes: The transmitting beam corresponding to the remote sensing signal is determined to be the receiving beam for receiving the echo signal; The echo signal corresponding to the remote sensing signal is received based on the receiving beam.

12. An electronic device, characterized in that, include: Memory and processor; Memory and processor are coupled; The memory is used to store instructions that can be executed by the processor; When the processor executes the instructions, it performs the method as described in any one of claims 1 to 11.

13. A computer program product, characterized in that, The computer program product includes computer instructions that, when executed on a computer, cause the computer to perform the method as described in any one of claims 1 to 11.

Images