Signal transmission method and apparatus, communication device, and readable storage medium

Abstract

The embodiment of the application discloses a signal transmission method and device, communication equipment and a readable storage medium, and belongs to the wireless communication field. The signal transmission method in the embodiment of the application comprises the following steps: acquiring a transmission block to be transmitted in a target two-dimensional transform domain; determining the number n of reference signals to be configured in the transmission block; the n is an integer greater than 1; configuring the n reference signals in the transmission block to obtain a target transmission block; the position of the n reference signals in the first dimension of the transmission block is determined according to the n, the size of the transmission block and a preset guard interval; the first dimension is any dimension in the target two-dimensional transform domain; and the target transmission block is transmitted.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of wireless communication, and particularly relates to a signal transmission method and device, communication equipment and a readable storage medium. BACKGROUND

[0002] With the development of communication technology, the existing communication system can support terminal high-speed motion environments such as aerial-to-ground communication, land high-speed rail communication, low-orbit satellite communication, etc. In this case, due to the complex signal propagation in the terminal high-speed motion environment, the channel estimation complexity under the existing single reference signal configuration scheme is very high, and the performance is not easy to improve. SUMMARY

[0003] The purpose of the embodiments of the present application is to provide a signal transmission method, device, communication equipment and readable storage medium to solve the problem of high channel estimation complexity under the existing single reference signal configuration scheme.

[0004] In a first aspect, a signal transmission method is provided, comprising:

[0005] obtaining a transmission block to be transmitted in a target two-dimensional transform domain;

[0006] determining the number n of reference signals to be configured in the transmission block; wherein the n is an integer greater than 1;

[0007] configuring the n reference signals in the transmission block to obtain a target transmission block; wherein the positions of the n reference signals in the first dimension of the transmission block are determined according to the n, the size of the transmission block and a preset guard interval; the first dimension is any dimension in the target two-dimensional transform domain;

[0008] transmitting the target transmission block.

[0009] In a second aspect, a signal transmission device is provided, comprising:

[0010] an obtaining module configured to obtain a transmission block to be transmitted in a target two-dimensional transform domain;

[0011] a determining module configured to determine the number n of reference signals to be configured in the transmission block; wherein the n is an integer greater than 1;

[0012] a configuring module configured to configure the n reference signals in the transmission block to obtain a target transmission block; wherein the positions of the n reference signals in the first dimension of the transmission block are determined according to the n, the size of the transmission block and a preset guard interval; the first dimension is any dimension in the target two-dimensional transform domain;

[0013] a transmitting module configured to transmit the target transmission block.

[0014] In a third aspect, a communication device is provided, which comprises a processor, a memory, and a program or instructions stored in the memory and executable on the processor, which, when executed by the processor, implement the steps of the method according to the first aspect.

[0015] In a fourth aspect, a readable storage medium is provided, which stores a program or instructions, which, when executed by a processor, implement the steps of the method according to the first aspect.

[0016] In the embodiments of the present application, after obtaining a transmission block to be transmitted on a target two-dimensional transform domain and determining the number n (n is an integer greater than 1) of reference signals to be configured in the transmission block, the n reference signals can be configured in the transmission block to obtain a target transmission block and transmit the target transmission block, wherein the positions of the n reference signals in a first dimension of the transmission block are determined according to n, the size of the transmission block, and a preset guard interval, and the first dimension is any dimension in the target two-dimensional transform domain. Thus, by virtue of the design of the plurality of reference signals, the complexity of channel estimation can be reduced, and the accuracy of channel estimation can be improved, thereby facilitating channel estimation in a complex channel environment. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a flowchart of a signal transmission method provided by the embodiments of the present application;

[0018] Figure 2 is a schematic diagram of transmitting a signal on a delay-Doppler domain according to a specific example of the present application;

[0019] Figure 3 is a structural schematic diagram of a signal transmission device provided by the embodiments of the present application;

[0020] Figure 4 is a structural schematic diagram of a communication device provided by the embodiments of the present application. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0022] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally a class, not limited to the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / ", generally indicates that the objects before and after are in a "or" relationship.

[0023] The signal transmission method, device, communication device and readable storage medium provided by the embodiments of the present application will be described in detail below in combination with the drawings, specific embodiments and application scenarios.

[0024] Please refer to Figure 1 , Figure 1 is a flowchart of a signal transmission method provided by an embodiment of the present application. The method is applied to a communication device, which can be selected as a terminal or a network side device, and is not limited in this regard. As shown in Figure 1 , the method comprises the following steps:

[0025] Step 11: obtaining a transmission block to be transmitted in a target two-dimensional transform domain.

[0026] In the embodiment, the target two-dimensional transform domain includes but is not limited to a delay-Doppler domain, a two-dimensional transform domain obtained by time-frequency domain transformation, etc.

[0027] For the two-dimensional transform domain obtained by time-frequency domain transformation, the following expression can be used:

[0028]

[0029] wherein x[n,m] is a new two-dimensional transform domain signal, x(k,l) is a time-frequency domain signal, M and N are the size of the first dimension and the second dimension of the transmission block on the new two-dimensional transform domain respectively, κ υ is a configurable phase adjustment parameter. After adding the κ υ parameter, although the transform domains are different, the representation of the channel in the transform domain is similar, because the κ υ parameter will only change the phase of the dimension of the received signal in the transform domain and the degree of amplitude dispersion.

[0030] In some embodiments, the target two-dimensional transform domain is not a time-frequency domain in an Orthogonal Frequency Division Multiplexing (OFDM) system, but a new two-dimensional transform domain, such as a delay-Doppler domain.

[0031] Step 12: determining the number n of reference signals to be configured in the transport block.

[0032] wherein n is an integer greater than 1. For example, n can be equal to 2, 3, or 4, etc.

[0033] In some embodiments, the number n of reference signals to be configured can be determined according to the feedback channel information. For example, if the communication device is a terminal, the number n of reference signals to be configured can be determined according to the feedback downlink channel information; or if the communication device is a network side device, the number n of reference signals to be configured can be determined according to the feedback uplink channel information.

[0034] Step 13: configuring n reference signals in the transport block to obtain a target transport block.

[0035] In the present embodiment, the positions of the n reference signals in the first dimension of the transport block can be determined according to n, the size of the transport block, and a preset guard interval. The preset guard interval can be determined according to the specific two-dimensional transform domain. The first dimension is any dimension in the target two-dimensional transform domain.

[0036] In some embodiments, the target two-dimensional transform is a delay-Doppler domain, and the first dimension is a delay dimension. In this case, the preset guard interval is related to delay, and can be 2 or 3 symbols, etc.

[0037] It should be noted that the positions of the n reference signals in the other dimension of the transport block (i.e., the other dimension in the target two-dimensional transform domain, except the first dimension) are not limited in the present embodiment, and can be selected based on actual needs.

[0038] Step 14: transmitting the target transport block.

[0039] In the present embodiment, the target transport block can be transmitted in the target two-dimensional transform domain, or can be transmitted in the time-frequency domain after a transformation from the target two-dimensional transform domain to the time-frequency domain, and no limitation is made thereto, and the selection can be based on actual needs.

[0040] The signal transmission method of the embodiments of the present application, after obtaining a transmission block to be transmitted in a target two-dimensional transform domain and determining the number n (n is an integer greater than 1) of reference signals to be configured in the transmission block, the n reference signals can be configured in the transmission block to obtain a target transmission block and transmit, wherein the positions of the n reference signals in the first dimension of the transmission block can be determined according to n, the size of the transmission block and the preset guard interval, and the first dimension is any dimension in the target two-dimensional transform domain. Thus, by virtue of the design of multiple reference signals, the complexity of channel estimation can be lower, and the accuracy of channel estimation can be higher, thereby facilitating channel estimation in a complex channel environment.

[0041] In the embodiments of the present application, when the n reference signals are configured in the transmission block, there are mainly two key points: one key point is that based on the multiplexing guard interval criterion, the guard interval between adjacent two reference signals is tried to be served for the two reference signals to reduce the overhead of the guard interval; and the other key point is that the distance of the two reference signals in the first dimension of the transmission block is tried to be as large as possible to improve the anti-noise performance.

[0042] As an optional embodiment of the present application, when n is equal to 2, the size of the transmission block in the first dimension is l0, and the preset guard interval is l, the configuration interval of the two reference signals in the first dimension of the transmission block is: l0-l. In this way, on the one hand, the guard interval l can be applied to the two reference signals at the same time, that is, the guard interval l in the negative direction of the first reference signal can also be used as the guard interval l in the positive direction of the second reference signal, thereby multiplexing this part of the guard interval to reduce the overhead of the guard interval; on the other hand, by setting the configuration interval of the two reference signals in the first dimension of the transmission block to l0-l, the distance of the two reference signals in the first dimension of the transmission block can be as large as possible, thereby enlarging the absolute distance of the two reference signals in the transform domain transmission block to improve the anti-noise performance of channel estimation.

[0043] Further, if the two reference signals include a first reference signal and a second reference signal, the configuration of the first reference signal and the second reference signal can be selected as any one of the following: 1) the first reference signal is configured at the starting position (i.e. the first position) in the first dimension of the transmission block, and the second reference signal is configured at the position l+1 away from the end position in the first dimension of the transmission block, that is, the second reference signal is configured at the front end of the guard interval multiplexed with the first reference signal; 2) the first reference signal is configured at the position l+1 away from the starting position in the first dimension of the transmission block, that is, the first reference signal is configured at the rear end of the guard interval multiplexed with the second reference signal, and the second reference signal is configured at the end position (i.e. the last position) in the first dimension of the transmission block.

[0044] As an optional embodiment of the present application, when n is greater than 2, the size of the transmission block in the first dimension is l0, and the preset guard interval is l, for any 2 reference signals in the n reference signals, one reference signal is configured at the starting position in the first dimension of the transmission block, and the other reference signal is configured at the position l+1 away from the end position in the first dimension of the transmission block. And the other n-2 reference signals in the n reference signals, except for the any 2 reference signals, are distributed between the above any 2 reference signals according to the preset criterion.

[0045] Optionally, the preset criterion can include but is not limited to at least one of the following: uniform distribution, multiplexing guard interval. The uniform distribution can be understood as that the interval of the adjacent 2 reference signals in the first dimension is approximately equal. The multiplexing guard interval can be understood as that the interval of the adjacent 2 reference signals in the first dimension is less than 2l, so that the guard interval between the 2 reference signals can be multiplexed.

[0046] In some embodiments, the n-2 reference signals can be configured between the 2 reference signals in the determined positions according to the uniform distribution as the criterion.

[0047] In some embodiments, the n-2 reference signals can be configured between the 2 reference signals in the determined positions according to the multiplexing guard interval as the criterion.

[0048] In some embodiments, the n-2 reference signals can be configured between the 2 reference signals in the determined positions according to the uniform distribution and the multiplexing guard interval as the criterion.

[0049] It should be pointed out that the embodiments of the present application can be applied to various communication systems based on two-dimensional transform domain, including but not limited to Orthogonal Time Frequency Space (OTFS) system and the like. In the OTFS system, the modulation symbol is no longer transmitted in the time-frequency domain, but in a new type of transform domain, which is called delay-Doppler domain.

[0050] For the delay-Doppler domain, on the one hand, due to the fact that the ideal waveform of biorthogonal cannot be realized, the inter-carrier interference (ICI) caused by the Doppler frequency offset may appear in the form of phase shift in this two-dimensional transform domain, and on the other hand, in the real application scenario, due to the limited frame length, the insufficient Doppler resolution will cause the channel to disperse in this two-dimensional transform domain, increasing the difficulty of channel estimation and the complexity of the receiver. Therefore, the reference signal design scheme in the embodiments of the present application can be used to make the channel present a more stable and sparse form in the delay-Doppler domain, so as to accurately obtain the channel information at the receiving end.

[0051] The following describes the embodiments of the present application by taking the delay-Doppler domain as an example.

[0052] In the embodiments of the present application, one transmission block on the delay-Doppler domain corresponding to the OTFS system is taken as an example, and the size of the transmission block is 11*14, where 11 is the size of the transmission block in the Doppler dimension, 14 is the size of the transmission block in the delay dimension, and the basic unit is a symbol. The entire transmission block is used for data transmission, that is, for the transmission block, in the Doppler dimension, k begin = 0, k end = 10; in the delay dimension, l begin = 0, l end = 13. The specific parameters are shown in Table 1 as follows:

[0053] Table 1

[0054] Parameter Value Transport block size 11*14 Channel maximum latency 2 symbols Number of reference signals 2

[0055] Under the above parameter settings, the configuration mode of the reference signal and the guard interval can be as shown in Figure 2 . Among them, P1 represents reference signal 1, P2 represents reference signal 2, "0" represents a guard interval symbol, that is, an empty symbol, and "x" represents a data signal. The size of the guard interval in the delay dimension is related to the channel delay, and is set to 2 symbols. P1 is configured at the starting position in the delay dimension of the transmission block, and P2 is configured at the position 3 symbols away from the end position in the delay dimension of the transmission block, so as to multiplex the guard interval between P1 and P2, and the distance in the delay dimension of the transmission block is as large as possible.

[0056] It should be pointed out that in Figure 2 , the positions of P1 and P2 in the Doppler dimension of the transmission block are the same, but it is not limited thereto, and can be selected based on actual needs.

[0057] It should be pointed out that in Figure 2 , the positions of P1 and P2 in the Doppler dimension of the transmission block are the same, but it is not limited thereto, and can be selected based on actual needs.

[0058] Please refer to Figure 3 , Figure 3 is a structural schematic diagram of a signal transmission device provided by an embodiment of the present application. The device is applied to a communication equipment, which can be selected as a terminal or a network side equipment, and is not limited thereto. As shown in Figure 3 , the signal transmission device 30 comprises:

[0059] The acquisition module 31 is configured to acquire a transmission block to be transmitted in a target two-dimensional transform domain.

[0060] determining a number n of reference signals to be configured in the transport block; wherein the n is an integer greater than 1;

[0061] configuring the n reference signals in the transport block to obtain a target transport block; wherein positions of the n reference signals in a first dimension of the transport block are determined according to the n, a size of the transport block and a preset guard interval; the first dimension is any dimension in the target two-dimensional transform domain;

[0062] transmitting the target transport block.

[0063] Optionally, when the n is equal to 2, a size of the transport block in the first dimension is l0, and the preset guard interval is l, a configuration interval of the 2 reference signals in the first dimension is l0-l.

[0064] Optionally, the 2 reference signals include a first reference signal and a second reference signal; wherein the first reference signal is configured at a start position in the first dimension of the transport block, and the second reference signal is configured at a position l+1 away from an end position in the first dimension of the transport block; or the first reference signal is configured at a position l+1 away from the start position in the first dimension of the transport block, and the second reference signal is configured at the end position in the first dimension of the transport block.

[0065] Optionally, when the n is greater than 2, a size of the transport block in the first dimension is l0, and the preset guard interval is l, for any 2 reference signals of the n reference signals, one reference signal is configured at a start position in the first dimension of the transport block, and the other reference signal is configured at a position l+1 away from an end position in the first dimension of the transport block.

[0066] The other reference signals of the n reference signals except the any 2 reference signals are distributed between the any 2 reference signals according to a preset criterion.

[0067] Optionally, the preset criterion includes at least one of the following:

[0068] uniform distribution, multiplexing guard interval.

[0069] Optionally, the target two-dimensional transform domain is a delay-Doppler domain; and the first dimension is a delay dimension.

[0070] The signal transmission apparatus 30 in the embodiments of the present application can be an apparatus, or a component, an integrated circuit, or a chip in a terminal. The apparatus can be a mobile communication device, or a non-mobile communication device. Exemplarily, the mobile communication device can be a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted communication device, a wearable device, an ultra-mobile personal computer (UMPC), a netbook, or a personal digital assistant (PDA), etc., and the non-mobile communication device can be a personal computer (PC), a television (TV), a cashier machine, or a self-service machine, etc., which are not limited in the embodiments of the present application.

[0071] The signal transmission apparatus 30 in the embodiments of the present application can be an apparatus with an operating system. The operating system can be an Android operating system, an ios operating system, or other possible operating systems, which are not limited in the embodiments of the present application.

[0072] The signal transmission apparatus 30 in the embodiments of the present application can implement the processes of the method embodiments shown in the above Figure 1 and achieve the same technical effects. To avoid repetition, details are not described herein.

[0073] Optionally, as shown in the above Figure 4 The embodiments of the present application further provide a communication device 40, which includes a processor 41, a memory 42, and a program or instruction stored in the memory 42 and executable in the processor 41. The program or instruction is executed by the processor 41 to implement the processes of the above signal transmission method embodiments and achieve the same technical effects. To avoid repetition, details are not described herein. Optionally, the communication device 40 can be a terminal or a network side device.

[0074] The embodiments of the present application further provide a readable storage medium, which has a program or instruction stored therein. The program or instruction is executed by a processor to implement the processes of the above signal transmission method embodiments and achieve the same technical effects. To avoid repetition, details are not described herein.

[0075] Computer-readable media includes permanent and non-permanent, removable and non-removable media, which can be implemented by any method or technology to store information. Information can be computer-readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassette, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information accessible by a computing device. According to the definition herein, computer-readable media does not include transitory media such as modulated data signals and carriers.

[0076] It should be noted that in this paper, the term "includes", "contains" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "includes a" does not exclude the presence of another identical element in the process, method, article or device including the element.

[0077] The above-mentioned application embodiment serial number is only for description, not representing the pros and cons of the embodiment.

[0078] Through the above description of the embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment method can be realized by software plus the necessary general hardware platform, of course, it can also be realized by hardware, but in many cases the former is a better embodiment. Based on such understanding, the technical solutions of the present application can be embodied in the form of software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), including a plurality of instructions for making a service classification device (which can be a mobile phone, computer, server, air conditioner or network equipment, etc.) execute the method described in each embodiment of the present application.

[0079] The above-mentioned is only the preferred embodiment of the present application, it should be pointed out that, for those skilled in the art, without departing from the principle of the present application, a number of improvements and refinements can be made, these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A signal transmission method, characterized by, The method comprises: obtaining a transmission block to be transmitted in a target two-dimensional transform domain; determining a number n of reference signals to be configured in the transmission block; wherein the n is an integer greater than 1; configuring the n reference signals in the transmission block to obtain a target transmission block; wherein the positions of the n reference signals in a first dimension of the target two-dimensional transform domain are determined according to the n, the size of the transmission block, and a preset guard interval; the first dimension is any dimension in the target two-dimensional transform domain; transmitting the target transmission block; when the n is equal to 2, the size of the transmission block in the first dimension is l0, and the preset guard interval is l, the configuration interval of the two reference signals in the first dimension is l0-l; when the n is greater than 2, the size of the transmission block in the first dimension is l0, and the preset guard interval is l, for any two reference signals of the n reference signals, one reference signal is configured at a starting position in the first dimension of the transmission block, and the other reference signal is configured at a position l+1 away from an end position in the first dimension of the transmission block; the other reference signals of the n reference signals, except the any two reference signals, are distributed between the any two reference signals according to a preset criterion.

2. The method of claim 1, wherein, when the n is equal to 2, the two reference signals comprise a first reference signal and a second reference signal; wherein the first reference signal is configured at a starting position in the first dimension of the transmission block, and the second reference signal is configured at a position l+1 away from an end position in the first dimension of the transmission block; or the first reference signal is configured at a position l+1 away from a starting position in the first dimension of the transmission block, and the second reference signal is configured at an end position in the first dimension of the transmission block.

3. The method of claim 1, wherein, the preset criterion comprises at least one of the following: uniform distribution, multiplexing guard interval.

4. The method of claim 1, wherein, The target two-dimensional transform domain is a delay-Doppler domain; and the first dimension is a delay dimension.

5. A signal transmission device, characterized by comprising: The method comprises: an obtaining module, configured to obtain a transmission block to be transmitted in a target two-dimensional transform domain; a determining module, configured to determine a number n of reference signals to be configured in the transmission block; wherein the n is an integer greater than 1; a configuring module, configured to configure the n reference signals in the transmission block to obtain a target transmission block; wherein the positions of the n reference signals in a first dimension of the target two-dimensional transform domain are determined according to the n, the size of the transmission block, and a preset guard interval; the first dimension is any dimension in the target two-dimensional transform domain; a transmitting module, configured to transmit the target transmission block; when the n is equal to 2, the size of the transmission block in the first dimension is l0, and the preset guard interval is l, the configuration interval of the two reference signals in the first dimension is l0-l; When the n is greater than 2, the size of the transmission block in the first dimension is l0, and the preset guard interval is l, for any 2 reference signals in the n reference signals, one reference signal is configured at the starting position of the first dimension of the transmission block, and the other reference signal is configured at the position l+1 away from the end position of the first dimension of the transmission block; the other reference signals in the n reference signals except the any 2 reference signals are distributed between the any 2 reference signals according to a preset criterion.

6. A communication device, characterized by A processor, a memory, and a program or instructions stored on the memory and executable on the processor, the program or instructions being executed by the processor to implement the steps of the signal transmission method according to any one of claims 1-4.

7. A readable storage medium, characterized by, A readable storage medium storing a program or instructions, the program or instructions being executed by a processor to implement the steps of the signal transmission method according to any one of claims 1-4.

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