Information transmission method and apparatus, and communication device

Abstract

The application provides an information transmission method, device and communication equipment. The method is executed by a sending device, and comprises the following steps: receiving channel parameters sent by a receiving device, wherein the channel parameters are obtained by the receiving device through channel estimation, and the channel parameters comprise delay parameters and Doppler parameters of at least one path channel; generating a time domain reference signal sequence according to the channel parameters; and sending the time domain reference signal sequence to the receiving device. The application designs a time domain reference signal sequence suitable for a scenario with a small Doppler domain dimension based on the channel parameters fed back by the receiving device, and can solve the problem of insufficient resolution in the Doppler domain in the scenario, thereby improving the signal transmission performance in a high-speed mobile scenario.

Description

Technical Field

[0001] This invention relates to the field of communication technology, and in particular to an information transmission method, apparatus, and communication equipment. Background Technology

[0002] Orthogonal Time Frequency Space (OTFS) modulation is a two-dimensional modulation technique used in the time-delay Doppler domain. This technique transforms a time-varying multipath channel into a time-invariant two-dimensional channel in the time-delay Doppler domain through a two-dimensional transformation. Leveraging the insensitivity of OTFS to Doppler frequency offset in the time-delay Doppler domain, it can be applied to high-speed mobile scenarios and combined with advanced channel equalizers to improve signal transmission performance in such environments.

[0003] Existing OTFS technologies typically choose large values ​​for the Doppler domain dimension H, such as 128 or 256. When H is small (e.g., 14), the Doppler domain suffers from insufficient resolution, leading to poor signal transmission performance in high-speed moving scenarios. Summary of the Invention

[0004] The purpose of this invention is to provide an information transmission method, apparatus, and communication device to solve the problem that when the Doppler domain dimension H is small in the existing OTFS technology, the Doppler domain has insufficient resolution, resulting in low signal transmission performance in high-speed moving scenarios.

[0005] To achieve the above objectives, in a first aspect, the present invention provides an information transmission method, executed by a transmitting device, comprising:

[0006] The receiving end device sends channel parameters, which are obtained by the receiving end device through channel estimation. The channel parameters include delay parameters and Doppler parameters of at least one path channel.

[0007] Generate a time-domain reference signal sequence based on the channel parameters;

[0008] The time-domain reference signal sequence is sent to the receiving device.

[0009] The channel parameters include the time delay vector parameter and Doppler vector parameter for each of all path channels;

[0010] Alternatively, the channel parameters include the delay scalar parameter and Doppler scalar parameter of the most diffuse path channel, wherein the most diffuse path channel is the path channel among all path channels that satisfies a first condition, the first condition being: the signal fills the time delay Doppler domain grid corresponding to the path channel, the difference between each pair of signal amplitudes corresponding to each grid is less than a preset threshold, and there is no maximum value among the signal amplitudes corresponding to all grids.

[0011] The step of generating a time-domain reference signal sequence based on the channel parameters includes:

[0012] For each path channel, a first matrix is ​​constructed using the Doppler parameters of that path channel;

[0013] Based on the first matrix, a first sequence with channel characteristics is obtained;

[0014] A time-domain reference signal sequence is generated based on the first sequence and the time delay parameters of the path channel.

[0015] Wherein, obtaining the first sequence with channel characteristics based on the first matrix includes:

[0016] Singular value decomposition is performed on the first matrix to obtain an intermediate feature vector sequence with channel characteristics;

[0017] Based on the intermediate feature vector sequence and the preset sequence, a first sequence with channel characteristics is obtained, wherein the preset sequence is used to characterize the reference signal.

[0018] The step of generating a time-domain reference signal sequence based on the first sequence and the time delay parameters of the path channel includes:

[0019] Update the time-domain guard interval length using the delay parameters of the path channel;

[0020] A time-domain reference signal sequence is generated based on the updated time-domain guard interval length and the first sequence.

[0021] Wherein, when the channel parameters include the time delay vector parameter and Doppler vector parameter of each path channel in all path channels, the step of generating a time-domain reference signal sequence based on the channel parameters includes:

[0022] The most diffuse path channel is determined based on the Doppler vector parameters of each path channel;

[0023] A time-domain reference signal sequence is generated based on the channel parameters corresponding to the most diffuse path channel.

[0024] The method further includes:

[0025] The channel information of the most diffuse path channel is sent to the receiving device.

[0026] Secondly, embodiments of the present invention also provide an information transmission method, executed by a receiving device, comprising:

[0027] Perform channel estimation to obtain channel parameters, which include delay parameters and Doppler parameters of at least one path channel;

[0028] The channel parameters are sent to the transmitting device.

[0029] The channel parameters include the time delay vector parameter and Doppler vector parameter for each of all path channels;

[0030] Alternatively, the channel parameters include the delay scalar parameter and Doppler scalar parameter of the most diffuse path channel, wherein the most diffuse path channel is a path channel among all path channels that satisfies a first condition, the first condition being: the signal fills the time delay Doppler domain grid corresponding to the path channel, the difference between each pair of signal amplitudes corresponding to each grid is less than a preset threshold, and there is no maximum value among the signal amplitudes corresponding to all grids.

[0031] The process of performing channel estimation to obtain channel parameters includes:

[0032] Perform channel estimation to obtain the Doppler vector parameters of each path channel in all path channels;

[0033] The most diffuse path channel is determined based on the Doppler vector parameters of each path channel.

[0034] The time delay scalar parameter and Doppler scalar parameter of the most diffuse path channel are used as channel parameters.

[0035] Thirdly, embodiments of the present invention also provide an information transmission device, comprising:

[0036] A receiving module is used to receive channel parameters sent by a receiving device. The channel parameters are obtained by the receiving device through channel estimation. The channel parameters include delay parameters and Doppler parameters of at least one path channel.

[0037] The first processing module is used to generate a time-domain reference signal sequence based on the channel parameters;

[0038] The first transmitting module is used to transmit the time-domain reference signal sequence to the receiving device.

[0039] Fourthly, embodiments of the present invention also provide an information transmission device, comprising:

[0040] The second processing module is used to perform channel estimation and obtain channel parameters, which include the time delay parameters and Doppler parameters of at least one path channel.

[0041] The first transmitting module is used to transmit the channel parameters to the transmitting device.

[0042] Fifthly, embodiments of the present invention also provide a transmitting device, including a processor and a transceiver, wherein the transceiver receives and transmits data under the control of the processor, and the processor is configured to perform the following operations:

[0043] The transceiver receives channel parameters sent by the receiving device. The channel parameters are obtained by the receiving device through channel estimation. The channel parameters include the delay parameters and Doppler parameters of at least one path channel.

[0044] Generate a time-domain reference signal sequence based on the channel parameters;

[0045] The time-domain reference signal sequence is transmitted to the receiving device via a transceiver.

[0046] Sixthly, embodiments of the present invention also provide a receiving device, including a processor and a transceiver, wherein the transceiver receives and transmits data under the control of the processor, and the processor is configured to perform the following operations:

[0047] Perform channel estimation to obtain channel parameters, which include delay parameters and Doppler parameters of at least one path channel;

[0048] The channel parameters are sent to the transmitting device via a transceiver.

[0049] In a seventh aspect, embodiments of the present invention also provide a communication device, including a memory, a processor, and a program stored in the memory and executable on the processor; when the processor executes the program, it implements the information transmission method as described in the first aspect above, or implements the information transmission method as described in the second aspect above.

[0050] Eighthly, embodiments of the present invention also provide a computer-readable storage medium having a computer program stored thereon, characterized in that, when executed by a processor, the program implements the steps of the information transmission method as described in the first aspect above, or implements the steps of the information transmission method as described in the second aspect above.

[0051] The above-described technical solution of the present invention has at least the following beneficial effects:

[0052] In this embodiment of the invention, channel parameters are received from a receiving device. These channel parameters are obtained by the receiving device through channel estimation and include delay parameters and Doppler parameters for at least one path channel. Then, a time-domain reference signal sequence is generated based on these channel parameters. Finally, the time-domain reference signal sequence is sent to the receiving device. In this way, a time-domain reference signal sequence suitable for scenarios with a small Doppler domain dimension is designed based on the channel parameters fed back by the receiving device. This can address the problem of insufficient resolution in the Doppler domain in such scenarios, thereby improving the signal transmission performance in high-speed mobile scenarios. Attached Figure Description

[0053] Figure 1 This is a schematic flowchart illustrating one of the information transmission methods provided in an embodiment of the present invention;

[0054] Figure 2 This represents the first transmission scenario of the information transmission method according to an embodiment of the present invention.

[0055] Figure 3 This represents the second transmission scenario of the information transmission method according to an embodiment of the present invention.

[0056] Figure 4 This indicates the third transmission scenario of the information transmission method according to an embodiment of the present invention;

[0057] Figure 5 A schematic diagram illustrating the generation process of the time-domain reference signal sequence in an embodiment of the present invention;

[0058] Figure 6 One of the schematic diagrams illustrating a time-domain reference signal sequence according to an embodiment of the present invention;

[0059] Figure 7 A second schematic diagram illustrating the time-domain reference signal sequence of an embodiment of the present invention;

[0060] Figure 8 This is a second flowchart illustrating the information transmission method provided in an embodiment of the present invention.

[0061] Figure 9 This is a schematic diagram of one module of the information transmission device provided in an embodiment of the present invention;

[0062] Figure 10 This is a second schematic diagram of the module of the information transmission device provided in an embodiment of the present invention;

[0063] Figure 11 This is a schematic diagram of the structure of the transmitting device provided in an embodiment of the present invention;

[0064] Figure 12 This is a schematic diagram showing the structure of the receiving device provided in an embodiment of the present invention. Detailed Implementation

[0065] To make the technical problems, technical solutions and advantages of the present invention clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0066] The fifth-generation mobile communication technology (5G) has established the plan to use Orthogonal Frequency Division Multiplexing (OFDM) systems for data channels. However, with the rapid development of terminals supported by B5G / 6G, such as aviation-to-ground communication, high-speed rail communication, and low-orbit satellite communication, modern communication needs to meet the communication requirements of high data rates in high-speed mobile scenarios. Although the currently deployed OFDM systems have very good performance in time-invariant channels, high Doppler frequency offset will severely disrupt the orthogonality between OFDM subcarriers, causing a significant deterioration in system performance.

[0067] OTFS modulation is a two-dimensional modulation technique used in the time-delay Doppler domain. This technique transforms a time-varying multipath channel into a time-invariant two-dimensional channel in the time-delay Doppler domain through a two-dimensional transformation. Leveraging the insensitivity of OTFS to Doppler frequency offset in the time-delay Doppler domain, it can be applied to high-speed mobile scenarios and combined with advanced channel equalizers to improve signal transmission performance in such environments.

[0068] Existing OTFS technologies typically choose large values ​​for the Doppler domain dimension H, such as 128 or 256. When H is small (e.g., 14), the Doppler domain suffers from insufficient resolution. A small Doppler domain dimension can lead to channel dispersion, thus affecting the overall quality of channel transmission.

[0069] Furthermore, most existing OTFS sequence schemes are only applicable to scenarios with large Doppler domain dimensions, with limited coverage of scenarios with smaller Doppler domains. Moreover, while there are many reference signals involved in existing OTFS technologies, there is still no standardized reference signal sequence based on feedback.

[0070] To address the aforementioned problems, this invention considers a transform domain approach (including the Doppler domain of OTFS technology and the adaptive two-dimensional transform domain) and designs time-domain sequences that can be used across all these transform domains. Therefore, this invention proposes a time-domain sequence design based on the transform domain.

[0071] like Figure 1 The diagram shown is a flowchart of an information transmission method provided in an embodiment of the present invention. This method is executed by a sending device and may include:

[0072] Step 101: Receive channel parameters sent by the receiving device. The channel parameters are obtained by the receiving device through channel estimation. The channel parameters include the delay parameters and Doppler parameters of at least one path channel.

[0073] Optionally, Case 1: The channel parameters include the delay vector parameters and Doppler vector parameters for each of all path channels;

[0074] In this case, the channel parameters are obtained directly by the receiving device through channel estimation.

[0075] Case 2: The channel parameters include the delay scalar parameter and Doppler scalar parameter of the most diffuse path channel. The most diffuse path channel is the path channel that satisfies the first condition among all path channels. The first condition is: the signal fills the time delay Doppler domain grid corresponding to the path channel, the difference between each pair of signal amplitudes corresponding to each grid is less than a preset threshold, and there is no maximum value among the signal amplitudes corresponding to all grids.

[0076] In this case, the channel parameters are obtained by the receiving device through channel estimation, based on the Doppler vector parameters of each path channel to determine the most diffuse path channel.

[0077] Step 102: Generate a time-domain reference signal sequence based on the channel parameters;

[0078] It should be noted that if the channel parameters are those described in Case 1 above, multiple sets of time-domain reference signal sequences are generated; if the channel parameters are those described in Case 2 above, one set of time-domain reference signal sequences is generated.

[0079] Here, the transmitting device designs a time-domain reference signal sequence suitable for scenarios with a small Doppler domain dimension based on the channel parameters fed back by the receiving device. This can optimize channel estimation, address the problem of insufficient resolution in the Doppler domain in this scenario, and thus improve the signal transmission performance in high-speed mobile scenarios.

[0080] Step 103: Send a time-domain reference signal sequence to the receiving device.

[0081] As an optional implementation, when the channel parameters include the time delay vector parameter and Doppler vector parameter for each of all path channels, step 102 further includes:

[0082] 1) Determine the most diffuse path channel based on the Doppler vector parameters of each path channel;

[0083] 2) Generate a time-domain reference signal sequence based on the channel parameters corresponding to the most diffuse path channel.

[0084] Furthermore, the method in this embodiment of the invention may further include:

[0085] Send the channel information of the most diffuse path channel to the receiving device.

[0086] It should be noted that before implementing this method, the receiving device does not know which channel has the most diffuse path. By implementing the above method, that is, sending the channel information of the most diffuse path channel to the receiving device, the receiving device can know the most diffuse path channel, which is beneficial to provide a reference for subsequent channel estimation and achieve the purpose of further optimizing the channel estimation.

[0087] As can be seen from the above description, the information transmission method of the present invention has three transmission scenarios.

[0088] Case 1, refer to Figure 2

[0089] Step 1: The receiving device performs channel estimation to obtain channel parameters, which include the delay vector parameters and Doppler vector parameters of each path channel. The receiving device then feeds back these channel parameters to the transmitting device.

[0090] Step 2: The transmitting device receives the channel parameters and generates multiple sets of time-domain reference signal sequences based on the channel parameters, and sends multiple sets of time-domain reference signal sequences to the receiving device.

[0091] Case 2, refer to Figure 3

[0092] Step 1: The receiving device performs channel estimation to obtain the delay vector parameters and Doppler vector parameters of each path channel in all path channels, and calculates the most diffuse path channel based on the Doppler vector parameters of each path channel; and feeds back the delay scalar parameters and Doppler scalar parameters of the most diffuse path channel as channel parameters to the transmitting device.

[0093] Step 2: The transmitting device receives the channel parameters, generates a set of time-domain reference signal sequences based on the channel parameters, and sends the set of time-domain reference signal sequences to the receiving device.

[0094] Case 3, refer to Figure 4

[0095] Step 1: The receiving device performs channel estimation to obtain channel parameters, which include the delay vector parameters and Doppler vector parameters of each path channel. The receiving device then feeds back these channel parameters to the transmitting device.

[0096] Step 2: The transmitting device receives the channel parameters and calculates the most diffuse path channel based on the Doppler vector parameters of each path channel in the channel parameters. According to the channel parameters corresponding to the most diffuse path channel, it generates a set of time-domain reference signal sequences and sends the set of time-domain reference signal sequences and the channel information of the most diffuse path channel to the receiving device.

[0097] As an optional implementation, step 102 above may include:

[0098] Step 1021: For each path channel, construct a first matrix using the Doppler parameters of that path channel;

[0099] Here, the Doppler parameter of the path channel is the Doppler value doppler1, and the first matrix constructed from it can be represented as:

[0100]

[0101] in, M represents the periodic interval of the time series, N represents the length of the time series, L represents the time domain guard interval, and δ represents the eigenvalue of a point in the first matrix.

[0102] Step 1022: Obtain a first sequence with channel characteristics based on the first matrix;

[0103] This step may specifically include:

[0104] a) Perform singular value decomposition on the first matrix to obtain an intermediate feature vector sequence with channel characteristics;

[0105] Specifically, this step can be represented as: H1=U1Σ1V1,v1=V1(:,1)

[0106] Here, H1 represents the first matrix, and v1 represents the intermediate feature vector sequence.

[0107] b) Based on the intermediate feature vector sequence and the preset sequence, a first sequence with channel characteristics is obtained, wherein the preset sequence is used to characterize the reference signal.

[0108] Optionally, the preset sequence includes, but is not limited to, the all-1 sequence and the ZC (Zadoff-Chu) sequence.

[0109] Specifically, the intermediate feature vector sequence is multiplied by a preset sequence to obtain the first sequence with channel characteristics. This can be represented as:

[0110] x l_new =x l ·v1, where x l_new Let x represent the first sequence. l This indicates a preset sequence.

[0111] Step 1023: Generate a time-domain reference signal sequence based on the first sequence and the time delay parameters of the path channel.

[0112] This step may specifically include:

[0113] i) Update the time-domain guard interval length using the delay parameters of the path channel;

[0114] ii) Generate a time-domain reference signal sequence based on the updated time-domain guard interval length and the first sequence.

[0115] Specifically, the updated time-domain guard interval length is combined with the first sequence to generate a time-domain reference signal sequence.

[0116] Figure 5 The above is shown Figures 2-4 The generation process of the time-domain reference signal sequence in three cases.

[0117] First, determine which situation it belongs to;

[0118] If it is case 1, then execute the process corresponding to case 1; if it is case 2, then execute the process corresponding to case 2; if it is case 3, then execute the process corresponding to case 3.

[0119] Next, the procedures for these three situations will be explained respectively.

[0120] Case 1: The feedback parameters (vector) are the delay parameters and Doppler parameters for each path channel;

[0121] A1, Input the received feedback parameters;

[0122] A2, construct a matrix using the feedback Doppler values;

[0123] A3, Perform singular value decomposition on the matrix to obtain eigenvectors;

[0124] A4, multiply the eigenvectors by the sequence representing the reference signal to obtain a new time sequence;

[0125] A5, update the time-domain protection interval length using delay parameters;

[0126] A6 combines the new timing sequence with the updated time-domain guard interval length to generate a time-domain reference signal sequence;

[0127] A7 checks if all path channel parameters have been used up. If yes, the process ends; otherwise, it returns to A1.

[0128] Case 2: The feedback parameters (scalars) are the delay parameters and Doppler parameters of the most diffuse path channel;

[0129] B1, Input the received feedback parameters;

[0130] B2, construct a matrix using the feedback Doppler values;

[0131] B3, Perform singular value decomposition on the matrix to obtain eigenvectors;

[0132] B4, multiply the eigenvectors by the sequence representing the reference signal to obtain a new time sequence;

[0133] B5, update the time-domain protection interval length using the time delay parameter;

[0134] B6. Combine the new timing sequence with the updated time-domain guard interval length to generate a time-domain reference signal sequence, and the process ends.

[0135] Case 3: The feedback parameters (vector) are the delay parameters and Doppler parameters for each path channel;

[0136] C1, determine which path is the most diffuse path;

[0137] C2, the feedback parameters of the most diffuse path channel;

[0138] C3, construct a matrix using the feedback Doppler values;

[0139] C4, perform singular value decomposition on the matrix to obtain eigenvectors;

[0140] C5, multiply the eigenvectors by the sequence representing the reference signal to obtain a new time sequence;

[0141] C6, update the time-domain protection interval length using the time delay parameter;

[0142] C7 combines the new timing sequence with the updated time-domain guard interval length to generate a time-domain reference signal sequence, and the process ends.

[0143] Example 1 for Case 1

[0144] Feedback parameters include the two-path channel delay and Doppler parameters (Doppler1 and Doppler2). The time sequence period interval M is 120, the time sequence length N is 12, and the time domain guard interval L is updated to 3 based on the delay parameters.

[0145] ① Construct matrices H1 and H2 using the feedback from Doppler1 and Doppler2;

[0146]

[0147]

[0148] ② Perform singular value decomposition on the constructed matrix to obtain eigenvector sequences v1 and v2, and multiply them by x respectively. l A new time-series sequence x with channel characteristics is obtained. l_new1 x l_new2 .

[0149] H1=U1Σ1V1,v1=V1(:,1),x l_new1 =x l v1

[0150] H2=U2Σ2V2,v2=V2(:,1),x l_new2 =x l v2

[0151] ③ Update the time-domain guard interval length L using the feedback delay value, and compare it with the time sequence x respectively. l_new1 x l_new2 Combine the generation of two sets of time-domain reference signal sequences, see [link / reference]. Figure 6 .

[0152] Example 2 for cases 2 and 3

[0153] Case 2: The feedback parameters include the Doppler parameter (Doppler1) of the delay of the most diffuse path channel, the period interval M of the time sequence is 120, the length N of the time sequence is 12, and the time domain guard interval L is updated to 3 according to the delay parameters.

[0154] Case 3: The feedback parameters include the Doppler parameter (Doppler1) of the delay of the most diffuse path channel, the period interval M of the time sequence is 120, the length N of the time sequence is 12, and the time domain guard interval L is updated to 3 according to the delay parameters.

[0155] ① Construct matrix H1 using the feedback from Doppler1;

[0156]

[0157] ② Perform singular value decomposition on the constructed matrix to obtain the eigenvector sequence v1, and multiply it by x. l A new time-series sequence x with channel characteristics is obtained. l_new1 .

[0158] H1=U1Σ1V1,v1=V1(:,1),x l_new1 =x l v1

[0159] ③ Update the time-domain guard interval length L using the feedback delay value, and compare it with the time sequence x. l_new1 Combined to generate a set of time-domain reference signal sequences, see [link / reference]. Figure 7 .

[0160] like Figure 8 The diagram shown is a flowchart of an information transmission method provided in an embodiment of the present invention. This method is executed by a receiving device and may include:

[0161] Step 801: Perform channel estimation to obtain channel parameters, which include the delay parameters and Doppler parameters of at least one path channel;

[0162] Optionally, Case 1: The channel parameters include the delay vector parameters and Doppler vector parameters for each of all path channels;

[0163] In this case, the channel parameters are obtained directly by the receiving device through channel estimation.

[0164] Case 2: The channel parameters include the delay scalar parameter and Doppler scalar parameter of the most diffuse path channel. The most diffuse path channel is the path channel that satisfies the first condition among all path channels. The first condition is: the signal fills the time delay Doppler domain grid corresponding to the path channel, the difference between each pair of signal amplitudes corresponding to each grid is less than a preset threshold, and there is no maximum value among the signal amplitudes corresponding to all grids.

[0165] In this case, the channel parameters are obtained by the receiving device through channel estimation, based on the Doppler vector parameters of each path channel to determine the most diffuse path channel.

[0166] Step 802: Send channel parameters to the transmitting device.

[0167] Here, the receiving device sends channel parameters to the transmitting device so that the transmitting device can generate a time-domain reference signal sequence based on the channel parameters. This can optimize channel estimation, address the problem of insufficient resolution in the Doppler domain in this scenario, and thus improve the signal transmission performance in high-speed mobile scenarios.

[0168] As an optional implementation, step 801 may specifically include:

[0169] Step 8011: Perform channel estimation to obtain the Doppler vector parameters of each path channel in all path channels;

[0170] Step 8012: Determine the most diffuse path channel based on the Doppler vector parameters of each path channel;

[0171] Step 8013: Use the delay scalar parameter and Doppler scalar parameter of the most diffuse path channel as the channel parameters.

[0172] It should be noted that the delay and Doppler parameters in the channel parameters obtained through this implementation are scalar parameters. This allows the transmission of these channel parameters to the transmitting device to reduce system processing latency and improve system processing efficiency.

[0173] This implementation method corresponds to Figure 1 Case 2 in the illustrated embodiment.

[0174] The information transmission method of this invention obtains channel parameters by performing channel estimation. The channel parameters include the delay parameters and Doppler parameters of at least one path channel. The channel parameters are then sent to the transmitting device to optimize the channel estimation, address the problem of insufficient resolution in the Doppler domain in this scenario, and improve the signal transmission performance in high-speed mobile scenarios.

[0175] like Figure 9 As shown, this embodiment of the invention also provides an information transmission device, which includes:

[0176] The receiving module 901 is used to receive channel parameters sent by the receiving device. The channel parameters are obtained by the receiving device through channel estimation. The channel parameters include the delay parameters and Doppler parameters of at least one path channel.

[0177] The first processing module 902 is used to generate a time-domain reference signal sequence based on channel parameters;

[0178] The first transmitting module 903 is used to transmit a time-domain reference signal sequence to the receiving device.

[0179] Optionally, the channel parameters include the time delay vector parameter and Doppler vector parameter for each of all path channels;

[0180] Alternatively, the channel parameters include the delay scalar parameter and Doppler scalar parameter of the most diffuse path channel. The most diffuse path channel is the path channel that satisfies the first condition among all path channels. The first condition is: the signal fills the time delay Doppler domain grid corresponding to the path channel, the difference between each pair of signal amplitudes corresponding to each grid is less than a preset threshold, and there is no maximum value among the signal amplitudes corresponding to all grids.

[0181] Optionally, the first processing module 902 includes:

[0182] The first processing unit is used to construct a first matrix for each path channel using the Doppler parameters of that path channel;

[0183] The second processing unit is used to obtain a first sequence with channel characteristics based on the first matrix;

[0184] The third processing unit is used to generate a time-domain reference signal sequence based on the first sequence and the time delay parameters of the path channel.

[0185] Optionally, the second processing unit is specifically used for:

[0186] Singular value decomposition is performed on the first matrix to obtain a sequence of intermediate feature vectors with channel characteristics;

[0187] Based on the intermediate feature vector sequence and the preset sequence, a first sequence with channel characteristics is obtained, wherein the preset sequence is used to characterize the reference signal.

[0188] Optionally, the third processing unit is specifically used for:

[0189] Update the time-domain guard interval length using the delay parameters of the path channel;

[0190] Based on the updated time-domain guard interval length and the first sequence, a time-domain reference signal sequence is generated.

[0191] Optionally, the first processing module 902 includes:

[0192] The fourth processing unit is used to determine the most diffuse path channel based on the Doppler vector parameters of each path channel, given that the channel parameters include the delay vector parameters and Doppler vector parameters of each path channel in all path channels.

[0193] The fifth processing unit is used to generate a time-domain reference signal sequence based on the channel parameters corresponding to the most diffuse path channel.

[0194] Optionally, the information transmission device in this embodiment of the invention further includes:

[0195] The second transmitting module is used to send channel information of the most diffuse path channel to the receiving device.

[0196] The information transmission device of this invention receives channel parameters sent by a receiving device, which are obtained by the receiving device through channel estimation. The channel parameters include delay parameters and Doppler parameters of at least one path channel. Then, a time-domain reference signal sequence is generated based on the channel parameters. Finally, the time-domain reference signal sequence is sent to the receiving device. In this way, a time-domain reference signal sequence suitable for scenarios with small Doppler domain dimensions is designed based on the channel parameters fed back by the receiving device. This can address the problem of insufficient resolution in the Doppler domain in such scenarios, thereby improving the signal transmission performance in high-speed mobile scenarios.

[0197] like Figure 10 As shown, this embodiment of the invention also provides an information transmission device, which includes:

[0198] The second processing module 1001 is used to perform channel estimation and obtain channel parameters, including the time delay parameters and Doppler parameters of at least one path channel.

[0199] The first transmitting module 1002 is used to transmit channel parameters to the transmitting device.

[0200] Optionally, the channel parameters include the time delay vector parameter and Doppler vector parameter for each of all path channels;

[0201] Alternatively, the channel parameters include the delay scalar parameter and Doppler scalar parameter of the most diffuse path channel. The most diffuse path channel is a path channel that satisfies a first condition among all path channels. The first condition is that the signal fills the time delay Doppler domain grid corresponding to the path channel, the difference between each pair of signal amplitudes corresponding to each grid is less than a preset threshold, and there is no maximum value among the signal amplitudes corresponding to all grids.

[0202] Optionally, the second processing module 1001 includes:

[0203] The sixth processing unit is used to perform channel estimation and obtain the Doppler vector parameters of each path channel in all path channels;

[0204] The seventh processing unit is used to determine the most diffuse path channel based on the Doppler vector parameters of each path channel;

[0205] The eighth processing unit is used to take the delay scalar parameter and Doppler scalar parameter of the most diffuse path channel as channel parameters.

[0206] The information transmission device of this invention obtains channel parameters by performing channel estimation. The channel parameters include the delay parameters and Doppler parameters of at least one path channel. The device sends the channel parameters to the transmitting device to optimize the channel estimation, thereby addressing the problem of insufficient resolution in the Doppler domain in this scenario and improving the signal transmission performance in high-speed mobile scenarios.

[0207] like Figure 11 As shown, this embodiment of the invention also provides a transmitting device, including a processor 1100 and a transceiver 1110. The transceiver 1110 receives and transmits data under the control of the processor 1100, and the processor 1100 is used to perform the following operations:

[0208] The transceiver 1110 receives channel parameters sent by the receiving device. The channel parameters are obtained by the receiving device through channel estimation. The channel parameters include the delay parameters and Doppler parameters of at least one path channel.

[0209] Generate a time-domain reference signal sequence based on the channel parameters;

[0210] Transmit a time-domain reference signal sequence to the receiving device via transceiver 1110.

[0211] Optionally, the channel parameters include the time delay vector parameter and Doppler vector parameter for each of all path channels;

[0212] Alternatively, the channel parameters include the delay scalar parameter and Doppler scalar parameter of the most diffuse path channel. The most diffuse path channel is the path channel that satisfies the first condition among all path channels. The first condition is: the signal fills the time delay Doppler domain grid corresponding to the path channel, the difference between each pair of signal amplitudes corresponding to each grid is less than a preset threshold, and there is no maximum value among the signal amplitudes corresponding to all grids.

[0213] Optionally, the processor 1100 is also used for:

[0214] For each path channel, a first matrix is ​​constructed using the Doppler parameters of that path channel;

[0215] Based on the first matrix, a first sequence with channel characteristics is obtained;

[0216] A time-domain reference signal sequence is generated based on the first sequence and the time delay parameters of the path channel.

[0217] Optionally, the processor 1100 is also used for:

[0218] Singular value decomposition is performed on the first matrix to obtain a sequence of intermediate feature vectors with channel characteristics;

[0219] Based on the intermediate feature vector sequence and the preset sequence, a first sequence with channel characteristics is obtained, wherein the preset sequence is used to characterize the reference signal.

[0220] Optionally, the processor 1100 is also used for:

[0221] Update the time-domain guard interval length using the delay parameters of the path channel;

[0222] Based on the updated time-domain guard interval length and the first sequence, a time-domain reference signal sequence is generated.

[0223] Optionally, the processor 1100 is also used for:

[0224] When the channel parameters include the time delay vector parameters and Doppler vector parameters of each path channel in all path channels, the most diffuse path channel is determined based on the Doppler vector parameters of each path channel.

[0225] A time-domain reference signal sequence is generated based on the channel parameters corresponding to the most diffuse path channel.

[0226] Optionally, transceiver 1110 is also used for:

[0227] Send the channel information of the most diffuse path channel to the receiving device.

[0228] The transmitting device in this embodiment of the invention receives channel parameters sent by the receiving device. These channel parameters are obtained by the receiving device through channel estimation and include delay parameters and Doppler parameters for at least one path channel. Then, based on these channel parameters, a time-domain reference signal sequence is generated. Finally, the time-domain reference signal sequence is sent to the receiving device. In this way, a time-domain reference signal sequence suitable for scenarios with small Doppler domain dimensions is designed based on the channel parameters fed back by the receiving device. This can address the problem of insufficient resolution in the Doppler domain in such scenarios, thereby improving the signal transmission performance in high-speed mobile scenarios.

[0229] like Figure 12 As shown, this embodiment of the invention also provides a receiving device, including a processor 1200 and a transceiver 1210. The transceiver 1210 receives and transmits data under the control of the processor 1200, and the processor 1200 is used to perform the following operations:

[0230] Perform channel estimation to obtain channel parameters, including the delay parameters and Doppler parameters of at least one path channel;

[0231] The transceiver 1210 sends channel parameters to the transmitting device.

[0232] Optionally, the channel parameters include the time delay vector parameter and Doppler vector parameter for each of all path channels;

[0233] Alternatively, the channel parameters include the delay scalar parameter and Doppler scalar parameter of the most diffuse path channel. The most diffuse path channel is a path channel that satisfies a first condition among all path channels. The first condition is that the signal fills the time delay Doppler domain grid corresponding to the path channel, the difference between each pair of signal amplitudes corresponding to each grid is less than a preset threshold, and there is no maximum value among the signal amplitudes corresponding to all grids.

[0234] Optionally, the processor 1200 is also used for:

[0235] Perform channel estimation to obtain the Doppler vector parameters of each path channel in all path channels;

[0236] The most diffuse path channel is determined based on the Doppler vector parameters of each path channel;

[0237] The delay scalar parameter and Doppler scalar parameter of the most diffuse path channel are used as channel parameters.

[0238] The receiving device in this embodiment of the invention obtains channel parameters by performing channel estimation. The channel parameters include the delay parameters and Doppler parameters of at least one path channel. The receiving device sends the channel parameters to the transmitting device to optimize the channel estimation, thereby addressing the problem of insufficient resolution in the Doppler domain in this scenario and improving the signal transmission performance in high-speed mobile scenarios.

[0239] This invention also provides a communication device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the various processes in the information transmission method embodiments described above and achieves the same technical effect. To avoid repetition, these will not be repeated here.

[0240] This invention also provides a computer-readable storage medium storing a computer program. When executed by a processor, this program implements the various processes described in the information transmission method embodiments above, achieving the same technical effects. To avoid repetition, it will not be described again here. The computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, etc.

[0241] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-readable storage media (including, but not limited to, disk storage and optical storage) containing computer-usable program code.

[0242] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 A device for one or more processes and / or the functions specified in one or more boxes.

[0243] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce a paper article including instruction means, the instruction means being implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0244] These computer program instructions can also be loaded onto a computer or other programmable data processing equipment, causing the computer or other programmable equipment to perform a series of operational steps to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0245] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An information transmission method, executed by a transmitting device, characterized in that, include: The receiving end device sends channel parameters, which are obtained by the receiving end device through channel estimation. The channel parameters include delay parameters and Doppler parameters of at least one path channel. Generate a time-domain reference signal sequence based on the channel parameters; The time-domain reference signal sequence is transmitted to the receiving device; The step of generating a time-domain reference signal sequence based on the channel parameters includes: For each of the at least one path channel, a first matrix is ​​constructed using the Doppler parameters of that path channel; Based on the first matrix, a first sequence with channel characteristics is obtained; A time-domain reference signal sequence is generated based on the first sequence and the time delay parameters of the path channel; The step of generating a time-domain reference signal sequence based on the first sequence and the time delay parameters of the path channel includes: Update the time-domain guard interval length using the delay parameters of the path channel; A time-domain reference signal sequence is generated based on the updated time-domain guard interval length and the first sequence.

2. The method according to claim 1, characterized in that, The channel parameters include the time delay vector parameters and Doppler vector parameters for each of all path channels; Alternatively, the channel parameters include the delay scalar parameter and Doppler scalar parameter of the most diffuse path channel, wherein the most diffuse path channel is the path channel among all path channels that satisfies a first condition, the first condition being: the signal fills the time delay Doppler domain grid corresponding to the path channel, the difference between each pair of signal amplitudes corresponding to each grid is less than a preset threshold, and there is no maximum value among the signal amplitudes corresponding to all grids.

3. The method according to claim 1, characterized in that, Obtaining a first sequence with channel characteristics based on the first matrix includes: Singular value decomposition is performed on the first matrix to obtain an intermediate feature vector sequence with channel characteristics; Based on the intermediate feature vector sequence and the preset sequence, a first sequence with channel characteristics is obtained, wherein the preset sequence is used to characterize the reference signal.

4. The method according to claim 2, characterized in that, When the channel parameters include the time delay vector parameters and Doppler vector parameters of each of all path channels, generating the time-domain reference signal sequence based on the channel parameters includes: The most diffuse path channel is determined based on the Doppler vector parameters of each path channel; A time-domain reference signal sequence is generated based on the channel parameters corresponding to the most diffuse path channel.

5. The method according to claim 4, characterized in that, The method further includes: The channel information of the most diffuse path channel is sent to the receiving device.

6. An information transmission method, executed by a receiving device, characterized in that, include: Perform channel estimation to obtain channel parameters, which include delay parameters and Doppler parameters of at least one path channel; The channel parameters are sent to the transmitting device so that the transmitting device generates a time-domain reference signal sequence based on the channel parameters. The transmitting device generates a time-domain reference signal sequence based on the channel parameters, including: constructing a first matrix using the Doppler parameters of each of the at least one path channel; obtaining a first sequence with channel characteristics based on the first matrix; updating the time-domain guard interval length using the delay parameters of the path channel; and generating a time-domain reference signal sequence based on the updated time-domain guard interval length and the first sequence. Receive the time-domain reference channel sequence sent by the transmitting device.

7. The method according to claim 6, characterized in that, The channel parameters include the time delay vector parameters and Doppler vector parameters for each of all path channels; Alternatively, the channel parameters include the delay scalar parameter and Doppler scalar parameter of the most diffuse path channel, wherein the most diffuse path channel is a path channel among all path channels that satisfies a first condition, the first condition being: the signal fills the time delay Doppler domain grid corresponding to the path channel, the difference between each pair of signal amplitudes corresponding to each grid is less than a preset threshold, and there is no maximum value among the signal amplitudes corresponding to all grids.

8. The method according to claim 6, characterized in that, The process of performing channel estimation to obtain channel parameters includes: Perform channel estimation to obtain the Doppler vector parameters of each path channel in all path channels; The most diffuse path channel is determined based on the Doppler vector parameters of each path channel. The time delay scalar parameter and Doppler scalar parameter of the most diffuse path channel are used as channel parameters.

9. An information transmission device, characterized in that, include: A receiving module is used to receive channel parameters sent by a receiving device. The channel parameters are obtained by the receiving device through channel estimation. The channel parameters include delay parameters and Doppler parameters of at least one path channel. The first processing module is used to generate a time-domain reference signal sequence based on the channel parameters; The first transmitting module is used to transmit the time-domain reference signal sequence to the receiving device; The first processing module includes: The first processing unit is configured to construct a first matrix for each of the at least one path channel using the Doppler parameters of that path channel; The second processing unit is used to obtain a first sequence with channel characteristics based on the first matrix; The third processing unit is used to generate a time-domain reference signal sequence based on the first sequence and the time delay parameters of the path channel; The third processing unit is specifically used for: Update the time-domain guard interval length using the delay parameters of the path channel; Based on the updated time-domain guard interval length and the first sequence, a time-domain reference signal sequence is generated.

10. An information transmission device, characterized in that, include: The second processing module is used to perform channel estimation and obtain channel parameters, which include the time delay parameters and Doppler parameters of at least one path channel. The first transmitting module is used to transmit the channel parameters to the transmitting device, so that the transmitting device generates a time-domain reference signal sequence based on the channel parameters; The transmitting device generates a time-domain reference signal sequence based on the channel parameters, including: constructing a first matrix using the Doppler parameters of each of the at least one path channel; obtaining a first sequence with channel characteristics based on the first matrix; updating the time-domain guard interval length using the delay parameters of the path channel; and generating a time-domain reference signal sequence based on the updated time-domain guard interval length and the first sequence. The second receiving module is used to receive the time-domain reference channel sequence sent by the transmitting device.

11. A transmitting device, comprising a processor and a transceiver, wherein the transceiver receives and transmits data under the control of the processor, characterized in that, The processor is used to perform the following operations: The transceiver receives channel parameters sent by the receiving device. The channel parameters are obtained by the receiving device through channel estimation. The channel parameters include the delay parameters and Doppler parameters of at least one path channel. Generate a time-domain reference signal sequence based on the channel parameters; The time-domain reference signal sequence is transmitted to the receiving device via a transceiver. The processor is also used for: For each of the at least one path channel, a first matrix is ​​constructed using the Doppler parameters of that path channel; Based on the first matrix, a first sequence with channel characteristics is obtained; Based on the first sequence and the time delay parameters of the path channel, a time-domain reference signal sequence is generated; The processor is also used for: Update the time-domain guard interval length using the delay parameters of the path channel; Based on the updated time-domain guard interval length and the first sequence, a time-domain reference signal sequence is generated.

12. A receiving device, comprising a processor and a transceiver, wherein the transceiver receives and transmits data under the control of the processor, characterized in that, The processor is used to perform the following operations: Perform channel estimation to obtain channel parameters, which include delay parameters and Doppler parameters of at least one path channel; The transceiver sends the channel parameters to the transmitting device, so that the transmitting device can generate a time-domain reference signal sequence based on the channel parameters. The transmitting device generates a time-domain reference signal sequence based on the channel parameters, including: constructing a first matrix using the Doppler parameters of each of the at least one path channel; obtaining a first sequence with channel characteristics based on the first matrix; updating the time-domain guard interval length using the delay parameters of the path channel; and generating a time-domain reference signal sequence based on the updated time-domain guard interval length and the first sequence. The transceiver receives the time-domain reference channel sequence sent by the transmitting device.

13. A communication device, comprising a memory, a processor, and a program stored in the memory and executable on the processor; characterized in that, When the processor executes the program, it implements the information transmission method as described in any one of claims 1 to 5, or the information transmission method as described in any one of claims 6 to 8.

14. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the steps of the information transmission method as described in any one of claims 1 to 5, or implements the steps of the information transmission method as described in any one of claims 6 to 8.

Images