Method and apparatus for determining super nyquist modulation waveform

Abstract

A method and device for determining an ultra-nyquist modulation waveform, the method comprising: receiving, by a base station, receiver capability information of at least one terminal in an ultra-nyquist FTN system; determining a complexity index of the FTN system according to the receiver capability information of the at least one terminal; designing an overall response sequence of the FTN system according to a performance index and the complexity index of the FTN system; determining an impulse response sequence of a transmitter of the FTN system according to the overall response sequence of the FTN system; and configuring a transmitting filter of the transmitter according to the impulse response sequence of the transmitter. The present application can flexibly design a modulation waveform of the FTN system according to a system performance and a complexity index, and improve transmission performance of the FTN system.

Description

Technical Field

[0001] This invention relates to the field of wireless communication technology, and specifically to a method and apparatus for determining super Nyquist modulation waveforms. Background Technology

[0002] Pulse Amplitude Modulation (PAM) systems can be divided into orthogonal systems and Faster-than-Nyquist (FTN) systems. Orthogonal systems use orthogonal modulation pulses, resulting in the lowest receiver complexity, but their performance is not necessarily optimal. FTN is a non-orthogonal transmission method. Unlike traditional Nyquist transmission systems, FTN compresses the symbol interval, allowing the symbol rate to exceed the Nyquist rate without inter-symbol interference (ISI), artificially introducing ISI. However, this does not necessarily mean a decrease in receiver detection performance. Figure 1 A schematic diagram of an FTN system is given.

[0003] Because FTN systems allow inter-symbol interference (ISI), the orthogonality of traditional shaped pulses (such as raised cosine pulses) is no longer a necessary condition. Furthermore, the drawbacks of orthogonal pulses are more pronounced in FTN systems, specifically manifested as poor time-frequency focusing characteristics, large sidelobe oscillation amplitudes, and the requirement for sufficiently long truncation lengths to ensure system error rate performance. Therefore, FTN systems based on orthogonal pulse shaping remain highly complex, while FTN systems based on non-orthogonal pulses (such as Gaussian pulses) are better suited to address these shortcomings. However, when the pulse transmission interval of an FTN system is small, the receiver performance will significantly degrade regardless of whether it is based on orthogonal pulse modulation or Gaussian pulse modulation.

[0004] In existing technologies, whether it is an orthogonal system or a non-orthogonal transmission system represented by FTN, the modulation pulse is usually selected from existing functions, and cannot be flexibly designed according to performance and complexity requirements. Summary of the Invention

[0005] At least one embodiment of the present invention provides a method and apparatus for determining super Nyquist modulation waveforms, which can flexibly design the modulation waveforms of an FTN system according to system performance and complexity indicators, thereby improving the transmission performance of the FTN system.

[0006] To solve the above-mentioned technical problems, the present invention is implemented as follows:

[0007] In a first aspect, embodiments of the present invention provide a method for determining a super Nyquist modulation waveform, comprising:

[0008] The base station receives receiver capability information from at least one terminal in the Super Nyquist FTN system;

[0009] The complexity index of the FTN system is determined based on the receiver capability information of the at least one terminal.

[0010] Based on the performance and complexity metrics of the FTN system, design the overall response sequence of the FTN system; based on the overall response sequence of the FTN system, determine the impulse response sequence of the transmitter of the FTN system.

[0011] Configure the transmitter's transmission filter based on the transmitter's impulse response sequence.

[0012] Optionally, the method further includes:

[0013] The overall response sequence of the FTN system or the impulse response sequence of the transmitter is sent to the terminal so that the terminal can determine the impulse response sequence of the receiver and configure the matched filter of the receiver based on the overall response sequence of the FTN system or the impulse response sequence of the transmitter.

[0014] Optionally, the method further includes:

[0015] Based on the impulse response sequence of the transmitter, determine the impulse response sequence of the receiver of the FTN system;

[0016] The impulse response sequence of the receiver is sent to the terminal so that the terminal can configure the matched filter of the receiver according to the impulse response sequence of the receiver.

[0017] Optionally, the receiver capability information includes at least the length of the tap coefficients of the matched filter; the complexity index includes the length of the overall response sequence of the FTN system.

[0018] Determining the complexity index of the FTN system based on the receiver capability information of the at least one terminal includes:

[0019] Based on the receiver capability information of the at least one terminal, determine the minimum length of the tap coefficients of the matched filter;

[0020] The length of the overall response sequence of the FTN system is determined based on the minimum length of the tap coefficients of the matched filter.

[0021] Optionally, determining the length of the overall response sequence of the FTN system based on the minimum length of the tap coefficients of the matched filter includes:

[0022] The length of the overall response sequence of the FTN system is determined to be 2l-1, where l represents the minimum length of the tap coefficients of the matched filter.

[0023] Optionally, the performance metrics of the FTN system include at least one of the following: bit error rate (BER), block error rate (BLER), mutual information (MI), and system capacity.

[0024] The step of designing the overall response sequence of the FTN system based on its performance and complexity metrics includes:

[0025] Based on the length of the overall response sequence of the FTN system, multiple centrally symmetric candidate overall response sequences are generated;

[0026] The candidate overall response sequence that satisfies the performance indicators of the FTN system is selected as the overall response sequence of the FTN system.

[0027] Secondly, embodiments of the present invention provide a method for determining a super Nyquist modulation waveform, comprising:

[0028] The terminal in the FTN system sends receiver capability information to the base station;

[0029] The terminal receives indication information of the receiver's impulse response sequence sent by the base station. The indication information includes at least one of the transmitter's impulse response sequence, the overall response sequence of the FTN system, and the receiver's impulse response sequence.

[0030] The terminal obtains the impulse response sequence of the receiver based on the indication information of the impulse response sequence of the receiver, and configures the matched filter of the receiver based on the impulse response sequence of the receiver.

[0031] Optionally, the overall response sequence of the FTN system is determined by the base station based on the receiver capability information of at least one terminal in the FTN system, the complexity index of the FTN system is determined, and then designed based on the performance index and complexity index of the FTN system.

[0032] The impulse response sequence of the transmitter is determined by the base station based on the overall response sequence of the FTN system.

[0033] Optionally, when the indication information is the impulse response sequence of the transmitter or the overall response sequence of the FTN system, the terminal obtains the impulse response sequence of the receiver based on the indication information of the impulse response sequence of the receiver, including:

[0034] The terminal determines the impulse response sequence of the receiver of the FTN system based on the impulse response sequence of the transmitter or the overall response sequence of the FTN system.

[0035] Thirdly, embodiments of the present invention provide a base station, including a transceiver and a processor, wherein...

[0036] The transceiver is used to receive receiver capability information of at least one terminal in the Super Nyquist FTN system;

[0037] The processor is configured to: determine the complexity index of the FTN system based on the receiver capability information of the at least one terminal; design the overall response sequence of the FTN system based on the performance index and complexity index of the FTN system; determine the impulse response sequence of the transmitter of the FTN system based on the overall response sequence of the FTN system; and configure the transmission filter of the transmitter based on the impulse response sequence of the transmitter.

[0038] Optionally, the transceiver is further configured to send the overall response sequence of the FTN system or the impulse response sequence of the transmitter to the terminal, so that the terminal can determine the impulse response sequence of the receiver and configure the matched filter of the receiver based on the overall response sequence of the FTN system or the impulse response sequence of the transmitter.

[0039] Optionally, the processor is further configured to determine the impulse response sequence of the receiver of the FTN system based on the impulse response sequence of the transmitter;

[0040] The transceiver is further configured to send the impulse response sequence of the receiver to the terminal, so that the terminal configures the matched filter of the receiver according to the impulse response sequence of the receiver.

[0041] Fourthly, embodiments of the present invention provide a base station, comprising: a processor, a memory, and a program stored in the memory and executable on the processor, wherein the program, when executed by the processor, implements the steps of the method described in the first aspect.

[0042] Fifthly, embodiments of the present invention provide a terminal, including a transceiver and a processor, wherein,

[0043] The transceiver is used to send receiver capability information to the base station; and to receive indication information of the receiver's impulse response sequence sent by the base station, the indication information including at least one of the transmitter's impulse response sequence, the overall response sequence of the FTN system, and the receiver's impulse response sequence.

[0044] The processor is configured to obtain the impulse response sequence of the receiver based on the indication information of the impulse response sequence of the receiver, and configure the matched filter of the receiver based on the impulse response sequence of the receiver.

[0045] In a sixth aspect, embodiments of the present invention provide a terminal, including: a processor, a memory, and a program stored in the memory and executable on the processor, wherein the program, when executed by the processor, implements the steps of the method described in the second aspect.

[0046] In a seventh aspect, embodiments of the present invention provide a computer-readable storage medium storing a program that, when executed by a processor, implements the steps of the method described above.

[0047] Compared with the prior art, the method and device for determining the super Nyquist modulation waveform provided in this embodiment of the invention can realize flexible modulation waveforms based on important factors such as receiver complexity, receiver performance, and transmission spectrum characteristics, thereby improving the transmission performance of the FTN system. Attached Figure Description

[0048] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0049] Figure 1 This is a schematic diagram of an FTN system;

[0050] Figure 2 This is a flowchart of a method for determining a super Nyquist modulation waveform according to an embodiment of the present invention;

[0051] Figure 3 This is another flowchart of the method for determining the super Nyquist modulation waveform according to an embodiment of the present invention;

[0052] Figure 4 This is a spectrum of the overall response sequence corresponding to the three tap coefficients in one example of the present invention;

[0053] Figure 5 This is a schematic diagram of the PSD capacity of three overall response sequences in one example of the present invention;

[0054] Figure 6 This is a schematic diagram of a discrete sequence of transmitted pulses g(t) in one example of the present invention;

[0055] Figure 7 This is a schematic diagram of the structure of a base station according to an embodiment of the present invention;

[0056] Figure 8 This is a schematic diagram of the structure of a base station according to another embodiment of the present invention;

[0057] Figure 9 This is a schematic diagram of the structure of a terminal according to an embodiment of the present invention;

[0058] Figure 10 This is a schematic diagram of the structure of a terminal according to another embodiment of the present invention;

[0059] Figure 11 This is a schematic diagram of the structure of a base station according to another embodiment of the present invention;

[0060] Figure 12 This is a schematic diagram of the structure of a terminal according to another embodiment of the present invention. Detailed Implementation

[0061] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0062] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus. The terms "and / or" in the specification and claims indicate at least one of the connected objects.

[0063] The following description provides examples and is not intended to limit the scope, applicability, or configuration set forth in the claims. Changes may be made to the function and arrangement of the elements discussed without departing from the spirit and scope of this disclosure. Various procedures or components may be appropriately omitted, substituted, or added to the examples. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Furthermore, features described with reference to certain examples may be combined in other examples.

[0064] The PAM system transmits the following signals:

[0065]

[0066] Among them, a n Let T represent the transmitted signal, g(t) represent the shaped pulse at the transmitting end (i.e., the response function of the transmitting filter), g(-t) represent the response function of the matched filter at the receiving end, and T represent the transmitted signal. s Indicates the symbol period. The overall response of the system is Where * represents the convolution operator, R represents the conjugate of g(-t). g (t) is the autocorrelation function of g(t).

[0067] In the Nyquist system, g(t) and g(t-nT) s ),satisfy Orthogonal, that is, the sampled output x of x(t) k =x(kT) s )satisfy:

[0068]

[0069] If formula (1) represents the FTN system, then T s =τT0, 0<τ<1. x(t) satisfies formula (2) when sampled according to the symbol time interval T0, but according to T s The sampling does not satisfy equation (2), {x k The variable} will contain multiple non-zero terms, which cause ISI. Due to the existence of ISI, Figure 1 The FTN detection module in the system cannot perform simple detection. In this case, the best detector is the grid decoder, whose grid graph state number is exponentially related to the ISI length.

[0070] The length of the ISI (Inter-Input Sequence) in an FTN system affects both the complexity of the receiver and the performance metrics of the FTN system. These performance metrics can include at least one of the following: Bit Error Rate (BER), Block Error Rate (BLER), Mutual Information (MI), and system capacity. Traditional FTN modulation pulses are typically selected from existing functions. However, this invention proposes a general method for determining the super Nyquist modulation waveform, constructing a pulse function (the impulse response sequence of the transmit filter) based on system requirements. For details, please refer to... Figure 2 The method for determining the super Nyquist modulation waveform provided in this embodiment of the invention includes:

[0071] Step 21: The base station receives receiver capability information from at least one terminal in the FTN system.

[0072] Here, terminals in the FTN system all feed back their receiver capability information to the base station. Specifically, the receiver capability information may include the length of the tap coefficients of the receiver's matched filter, as well as the receiver's detection performance, etc. In this article, the length of the tap coefficients of the receiver's matched filter is sometimes simply referred to as the matched filter length.

[0073] Step 22: Determine the complexity index of the FTN system based on the receiver capability information of the at least one terminal.

[0074] Here, the complexity index of the FTN system may include the length of the overall response sequence of the FTN system, where the overall response sequence refers to the response sequence including the transmitter and receiver. In this embodiment of the invention, the base station can determine the minimum length of the matched filter tap coefficients based on the receiver capability information of the at least one terminal. Then, based on the minimum length of the matched filter tap coefficients, the length of the overall response sequence of the FTN system is determined. Through the above processing, the base station coordinates the collected receiver matched filter lengths of each terminal, and typically selects the receiver with the shortest matched filter length as the overall system complexity index. For example, assuming the minimum length of the matched filter tap coefficients is l, the length of the overall response sequence of the FTN system is 2l-1.

[0075] Step 23: Design the overall response sequence of the FTN system based on the performance and complexity indicators of the FTN system; determine the impulse response sequence of the transmitter of the FTN system based on the overall response sequence of the FTN system.

[0076] Here, the performance metrics of the FTN system include at least one of BER, BLER, MI, and system capacity. When designing the overall response sequence of the FTN system, firstly, multiple centrally symmetric candidate overall response sequences can be generated based on the length of the overall response sequence of the FTN system. The length of the candidate overall response sequences is equal to the length of the overall response sequence. This embodiment of the invention does not limit the method of generating candidate overall response sequences; any sequence generation algorithm capable of generating sequences that meet the above requirements can be applied to this invention. For example, the aforementioned candidate overall response sequences can be generated randomly.

[0077] Then, from the generated multiple candidate overall response sequences, the candidate overall response sequence that satisfies the performance indicators of the FTN system is selected as the overall response sequence of the FTN system. For example, the frequency domain waveform of the candidate overall response sequence can be obtained using Discrete Fourier Transform, and the power spectral density (PSD) capacity of the candidate overall response sequence can be calculated. Based on the frequency domain waveform and PSD capacity of each candidate overall response sequence, the candidate overall response sequence that satisfies the performance indicators of the FTN system is selected as the overall response sequence of the FTN system. Then, based on the overall response sequence of the FTN system, an objective function is fitted, wherein the autocorrelation function of the objective function has the sampled values ​​of the overall response sequence. Based on the objective function, the impulse response sequence of the FTN system's transmitter is obtained.

[0078] Step 24: Configure the transmitter's transmission filter according to the transmitter's impulse response sequence.

[0079] In step 24, the base station configures the local transmitter's transmission filter according to the transmitter's impulse response sequence, thereby designing a super Nyquist modulation waveform according to system requirements, which can improve the transmission performance of the FTN system.

[0080] In this embodiment of the invention, the base station may also send the overall response sequence of the FTN system or the impulse response sequence of the transmitter to the terminal, so that the terminal can determine the impulse response sequence of the receiver and configure the matched filter of the receiver according to the overall response sequence of the FTN system or the impulse response sequence of the transmitter. In this way, the terminal can complete the receiver reception preparation and thus better receive the signal sent by the transmitter.

[0081] In this embodiment of the invention, the base station can also determine the impulse response sequence of the receiver of the FTN system based on the impulse response sequence of the transmitter; then, the base station directly sends the impulse response sequence of the receiver to the terminal. In this way, the terminal can directly configure the matched filter of the receiver based on the impulse response sequence of the receiver, thereby completing the receiver's reception preparation to receive the signal sent by the transmitter.

[0082] Please refer to Figure 3 The method for determining the super Nyquist modulation waveform according to embodiments of the present invention, when applied to a terminal of an FTN system, includes:

[0083] Step 31: The terminal of the FTN system sends the receiver capability information to the base station.

[0084] Here, the receiver capability information may include the length of the tap coefficients of the matched filter of the receiver, and may also include the detection performance of the receiver, etc.

[0085] Step 32: The terminal receives indication information of the receiver's impulse response sequence sent by the base station. The indication information includes at least one of the transmitter's impulse response sequence, the overall response sequence of the FTN system, and the receiver's impulse response sequence.

[0086] Here, the overall response sequence of the FTN system is determined by the base station based on the receiver capability information of at least one terminal in the FTN system, which determines the complexity index of the FTN system, and then designs it based on the performance and complexity indexes of the FTN system. The impulse response sequence of the transmitter is determined by the base station based on the overall response sequence of the FTN system.

[0087] Step 33: The terminal obtains the impulse response sequence of the receiver based on the indication information of the impulse response sequence of the receiver, and configures the matched filter of the receiver based on the impulse response sequence of the receiver.

[0088] For example, when the indication information is the impulse response sequence of the transmitter or the overall response sequence of the FTN system, the terminal determines the impulse response sequence of the receiver of the FTN system based on the impulse response sequence of the transmitter or the overall response sequence of the FTN system.

[0089] In this way, the terminal obtains the impulse response sequence of the receiver based on the indication information of the received impulse response sequence, and configures the matched filter of the local receiver accordingly, thereby enabling it to better receive the signal sent by the base station and improve the transmission performance of the FTN system.

[0090] The implementation of the method of the present invention on the base station and terminal sides has been described above. The method will now be further described in more detail through several examples.

[0091] In one example of the present invention, the following is specifically included:

[0092] 1) The user equipment (UE) feeds back its receiver capability information to the base station (BS), such as the length of the matched filter used locally and the detection performance.

[0093] 2) The base station coordinates the overall system complexity based on the length of the matched filter of each user equipment receiver collected. Generally, the receiver with the shortest matched filter length is selected as the overall system complexity index.

[0094] 3) Design the overall response sequence {x} based on the complexity index and the performance index of the FTN system. k}, and {x k} is a centrally symmetric sequence. In this design phase, this example does not limit specific performance metrics, nor does it require determining {x} based on performance metrics. k The method involves considering several factors. For example, complexity metrics are related to sequence length. Lower complexity metrics can be achieved by designing shorter sequence lengths, and vice versa. Another example is the design of {x} when the minimum BER is required. k}, possibly related to the design of {x} when minimizing MI. k} are different. This example can even randomly generate a centrally symmetric sequence {x} of a target length. k}

[0095] 4) According to {x k Design the impulse response g(t) of the transmit filter, i.e., fit a function g(t) such that its autocorrelation function has a specified sample value {x}. k There can be many such functions, with or without other constraints (such as bandwidth constraints, spectral sidelobe constraints, etc.). This example does not limit the specific method of function fitting or the specific constraints. Thus, based on the function g(t), the transmitter's tap coefficients can be obtained, and the base station's transmission filter can be configured according to these tap coefficients.

[0096] 5) The base station needs to incorporate the designed {x} k The impulse response of the matched filter obtained by fitting and / or fitting The relevant instructions are sent to the user equipment, and the user equipment responds accordingly. k}or The receiver's tap coefficients are determined, and the receiving filter is configured accordingly to complete the receiver's preparation for reception. Here, This represents the conjugate of g(-t).

[0097] Another example of the present invention includes the following:

[0098] 1) Each user equipment in the cell feeds back its receiver capability information to the base station, such as the length of the matched filter used locally, i.e. the length of the tap coefficients of the matched filter.

[0099] 2) Assume that the minimum tap coefficient length required for the matched filter complexity in the system is 5.

[0100] 3) Based on the transmit / receive matching, the overall system response length is 9, the center tap is normalized to 1, and the impulse response is symmetric about the center. Therefore, let the tap coefficients of the overall response {x} k}={d,c,b,a,1,a,b,c,d}.

[0101] 4) Try the following three different values ​​for a, b, c, and d, and find the corresponding tap coefficients. This example does not specify how these values ​​are generated; they can even be randomly generated:

[0102] {x1}={0.07,0.13,0.25,0.88,1,0.88,0.25,0.13,0.07},

[0103] {x2}={0.015,0.094,0.35,0.73,1,0.73,0.35,0.094,0.015},

[0104] {x3}={-0.015,-0.094,0.35,0.73,1,0.73,0.35,-0.094,-0.015}

[0105] The spectra of the three overall responses were obtained by discrete-time Fourier transform. Figure 4 The spectrum of the overall response sequence corresponding to the above three tap coefficients is given. Figure 5 The power spectral density (PSD) capacities for three types of overall response sequences are given.

[0106] 5) From Figure 4 and Figure 5 It can be concluded that {x1} has the largest sidelobe spread, followed by {x3}, while {x2} has the best spectral concentration characteristics. Since the capacity increase of the FTN system comes entirely from sidelobe spread, {x1} has the highest PSD capacity, followed by {x3}, and {x2} has the smallest. Meanwhile, {x2} has the best spectral concentration characteristics, effectively suppressing sidelobe interference, resulting in the best system bit error rate performance. In contrast, {x1} and {x3}, due to their more severe sidelobe oscillations, actually lead to a decrease in bit error rate performance.

[0107] Typically, the overall response coefficient {x} k The design of the filter should first meet two basic conditions: a) the difference between the PSD capacity and the actual capacity requirement is less than a preset threshold; b) the spectral energy is concentrated as much as possible. The following section uses {x2} as an example to configure the filter.

[0108] 6) Let the impulse response of the transmitting filter be {g}. -2 ,g -1 ,g0,g1,g2}, and satisfy g l =g -l ;

[0109] 7) According to the convolution relationship, {g -2 ,g -1The convolution of {g0, g1, g2} with itself equals {d, c, b, a, 1, a, b, c, d}, thus the following system of linear equations can be derived:

[0110]

[0111] We can solve for {g -2 ,g -1 ,g0,g1,g2}={0.1225,0.3824,0.8279,0.3824,0.1225}, Figure 6 A schematic diagram of the discrete sequence of transmitted pulses g(t) is given.

[0112] 8) The optimal matching sampling time at the receiver is related to the overall system response length and the transmission time corresponding to the highest tap coefficient of the transmitted pulse sequence: if the time corresponding to the highest tap coefficient of the transmitted symbol pulse is 2Δ, then the optimal matching sampling time at the receiver is 4Δ.

[0113] 9) For digital communication, the tap sequence {g} of the above-mentioned transmitting filter can be used. -2 ,g -1 The FTN transmission signal can be obtained by performing convolution operation on the encoded symbol sequence and removing the delay.

[0114] 10) The base station will transmit the filter sequence {g} via relevant instructions. -2 ,g -1 The sequence {g0, g1, g2} is sent to the user equipment so that the user equipment can prepare for matching and reception in a timely manner. Here, the user equipment can calculate the matching filter sequence based on the transmitted filter sequence.

[0115] As can be seen from the above examples, the embodiments of the present invention can improve the flexibility of the modulation waveform. The modulation waveform is no longer limited to the existing function, but rather, under the premise of fully considering the important factors that measure the system, such as receiver complexity, receiver performance, and transmission spectrum characteristics, a function that makes these factors reach the optimal solution is fitted, thereby ensuring that the FTN system or Nyquist system obtains better performance.

[0116] Compared to FTN or orthogonal systems based on Gaussian pulse or quadrature pulse modulation, the embodiments of this invention can flexibly adjust the waveform based on important factors such as receiver complexity, receiver performance, and transmission spectrum characteristics. Traditional methods (raised cosine pulse, Gaussian pulse, etc.) all use existing functions and fail to design waveforms simultaneously considering both complexity and receiver performance.

[0117] The various methods of the embodiments of the present invention have been described above. Apparatus for implementing the above methods will now be provided.

[0118] Please refer to Figure 7 This invention also provides a base station 700, comprising:

[0119] The first receiving module 701 is used to receive receiver capability information of at least one terminal in the Super Nyquist FTN system;

[0120] The first determining module 702 is used to determine the complexity index of the FTN system based on the receiver capability information of the at least one terminal.

[0121] The second determining module 703 is used to design the overall response sequence of the FTN system based on the performance indicators and complexity indicators of the FTN system; and to determine the impulse response sequence of the transmitter of the FTN system based on the overall response sequence of the FTN system.

[0122] The first configuration module 704 is used to configure the transmitter's transmission filter according to the transmitter's impulse response sequence.

[0123] Optionally, the base station further includes:

[0124] The first transmitting module is used to transmit the overall response sequence of the FTN system or the impulse response sequence of the transmitter to the terminal, so that the terminal can determine the impulse response sequence of the receiver and configure the matched filter of the receiver based on the overall response sequence of the FTN system or the impulse response sequence of the transmitter.

[0125] Optionally, the base station further includes:

[0126] The third determining module is used to determine the impulse response sequence of the receiver of the FTN system based on the impulse response sequence of the transmitter;

[0127] The second transmitting module is used to transmit the impulse response sequence of the receiver to the terminal, so that the terminal can configure the matched filter of the receiver according to the impulse response sequence of the receiver.

[0128] Optionally, the receiver capability information includes at least the length of the tap coefficients of the matched filter; the complexity index includes the length of the overall response sequence of the FTN system.

[0129] The first determining module is further configured to determine the minimum length of the tap coefficients of the matched filter based on the receiver capability information of the at least one terminal; and to determine the length of the overall response sequence of the FTN system based on the minimum length of the tap coefficients of the matched filter.

[0130] Optionally, the first determining module is further configured to determine that the length of the overall response sequence of the FTN system is 2l-1, where l represents the minimum length of the tap coefficients of the matched filter.

[0131] Optionally, the performance metrics of the FTN system include at least one of bit error rate (BER), block error rate (BLER), mutual information (MI), and system capacity; the second determining module is further configured to generate multiple centrally symmetric candidate overall response sequences based on the length of the overall response sequence of the FTN system; and select the candidate overall response sequence that satisfies the performance metrics of the FTN system as the overall response sequence of the FTN system.

[0132] It should be noted that the device in this embodiment is related to... Figure 2 The devices corresponding to the methods shown are all applicable to the embodiments of the above-described devices, and can achieve the same technical effects. The devices provided by the embodiments of the present invention can implement all the method steps implemented in the above-described method embodiments and can achieve the same technical effects. Therefore, the parts that are the same as those in the method embodiments and the beneficial effects will not be described in detail here.

[0133] Please refer to Figure 8 This invention also provides a base station 800, including a transceiver 801 and a processor 802; here, the transceiver may include a transmitter and a receiver.

[0134] The transceiver 801 is used to receive receiver capability information of at least one terminal in the Super Nyquist FTN system.

[0135] The processor 802 is configured to: determine the complexity index of the FTN system based on the receiver capability information of the at least one terminal; design the overall response sequence of the FTN system based on the performance index and complexity index of the FTN system; determine the impulse response sequence of the transmitter of the FTN system based on the overall response sequence of the FTN system; and configure the transmission filter of the transmitter based on the impulse response sequence of the transmitter.

[0136] Optionally, the transceiver is further configured to send the overall response sequence of the FTN system or the impulse response sequence of the transmitter to the terminal, so that the terminal can determine the impulse response sequence of the receiver and configure the matched filter of the receiver based on the overall response sequence of the FTN system or the impulse response sequence of the transmitter.

[0137] Optionally, the processor is further configured to determine the impulse response sequence of the receiver of the FTN system based on the impulse response sequence of the transmitter;

[0138] The transceiver is further configured to send the impulse response sequence of the receiver to the terminal, so that the terminal configures the matched filter of the receiver according to the impulse response sequence of the receiver.

[0139] Optionally, the receiver capability information includes at least the length of the tap coefficients of the matched filter; the complexity index includes the length of the overall response sequence of the FTN system; the processor is further configured to determine the minimum length of the tap coefficients of the matched filter based on the receiver capability information of the at least one terminal; and determine the length of the overall response sequence of the FTN system based on the minimum length of the tap coefficients of the matched filter.

[0140] Optionally, the processor is further configured to determine that the length of the overall response sequence of the FTN system is 2l-1, where l represents the minimum length of the tap coefficients of the matched filter.

[0141] Optionally, the performance metrics of the FTN system include at least one of bit error rate (BER), block error rate (BLER), mutual information (MI), and system capacity; the processor is further configured to generate multiple centrally symmetric candidate overall response sequences based on the length of the overall response sequence of the FTN system; and select the candidate overall response sequence that satisfies the performance metrics of the FTN system as the overall response sequence of the FTN system.

[0142] It should be noted that the device in this embodiment is the same as the one described above. Figure 2 The devices corresponding to the methods shown are all applicable to the embodiments of the above-described devices, and can achieve the same technical effects. The devices provided by the embodiments of the present invention can implement all the method steps implemented in the above-described method embodiments, and can achieve the same technical effects. Therefore, the parts that are the same as those in the method embodiments and the beneficial effects will not be described in detail here.

[0143] Please refer to Figure 9 This invention also provides a terminal 900, comprising:

[0144] The first transmitting module 901 is used for the terminal of the FTN system to send receiver capability information to the base station;

[0145] The first receiving module 902 is configured to receive indication information of the impulse response sequence of the receiver transmitted by the base station, wherein the indication information includes at least one of the impulse response sequence of the transmitter, the overall response sequence of the FTN system, and the impulse response sequence of the receiver.

[0146] The first configuration module 903 is used to obtain the impulse response sequence of the receiver based on the indication information of the impulse response sequence of the receiver, and to configure the matched filter of the receiver based on the impulse response sequence of the receiver.

[0147] Optionally, the overall response sequence of the FTN system is determined by the base station based on the receiver capability information of at least one terminal in the FTN system, the complexity index of the FTN system is determined, and then designed based on the performance index and complexity index of the FTN system.

[0148] The impulse response sequence of the transmitter is determined by the base station based on the overall response sequence of the FTN system.

[0149] Optionally, if the indication information is the impulse response sequence of the transmitter or the overall response sequence of the FTN system, the first configuration module is further configured to determine the impulse response sequence of the receiver of the FTN system based on the impulse response sequence of the transmitter or the overall response sequence of the FTN system.

[0150] It should be noted that the device in this embodiment is related to... Figure 3 The devices corresponding to the methods shown are all applicable to the embodiments of the above-described devices, and can achieve the same technical effects. The devices provided by the embodiments of the present invention can implement all the method steps implemented in the above-described method embodiments and can achieve the same technical effects. Therefore, the parts that are the same as those in the method embodiments and the beneficial effects will not be described in detail here.

[0151] Please refer to Figure 10 This invention also provides a terminal 1000, including a transceiver 1001 and a processor 1002; here, the transceiver may include a transmitter and a receiver.

[0152] The transceiver 1001 is used to send receiver capability information to a base station; and to receive indication information of the receiver's impulse response sequence sent by the base station, the indication information including at least one of the transmitter's impulse response sequence, the overall response sequence of the FTN system, and the receiver's impulse response sequence.

[0153] The processor 1002 is configured to obtain the impulse response sequence of the receiver based on the indication information of the impulse response sequence of the receiver, and configure the matched filter of the receiver based on the impulse response sequence of the receiver.

[0154] Optionally, the overall response sequence of the FTN system is determined by the base station based on the receiver capability information of at least one terminal in the FTN system, the complexity index of the FTN system is determined, and then designed based on the performance index and complexity index of the FTN system.

[0155] The impulse response sequence of the transmitter is determined by the base station based on the overall response sequence of the FTN system.

[0156] Optionally, when the indication information is the impulse response sequence of the transmitter or the overall response sequence of the FTN system, the terminal obtains the impulse response sequence of the receiver based on the indication information of the impulse response sequence of the receiver, including:

[0157] The terminal determines the impulse response sequence of the receiver of the FTN system based on the impulse response sequence of the transmitter or the overall response sequence of the FTN system.

[0158] It should be noted that the device in this embodiment is the same as the one described above. Figure 3 The devices corresponding to the methods shown are all applicable to the embodiments of the above-described devices, and can achieve the same technical effects. The devices provided by the embodiments of the present invention can implement all the method steps implemented in the above-described method embodiments, and can achieve the same technical effects. Therefore, the parts that are the same as those in the method embodiments and the beneficial effects will not be described in detail here.

[0159] Please refer to Figure 11 This invention also provides a base station 1100, including a processor 1101, a memory 1102, and a computer program stored in the memory 1102 and executable on the processor 1101. When the computer program is executed by the processor 1101, it implements the above-described... Figure 2 The various processes of the embodiment of the method for determining the super Nyquist modulated waveform shown can achieve the same technical effect, and will not be described again here to avoid repetition.

[0160] Please refer to Figure 12 This invention also provides a terminal 1200, including a processor 1201, a memory 1202, and a computer program stored in the memory 1202 and executable on the processor 1201. When executed by the processor 1201, the computer program implements the above-described... Figure 3 The various processes of the embodiment of the method for determining the super Nyquist modulated waveform shown can achieve the same technical effect, and will not be described again here to avoid repetition.

[0161] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0162] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0163] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of the present invention.

Claims

1. A method for determining a super Nyquist modulation waveform, characterized in that, include: The base station receives receiver capability information from at least one terminal in the Super Nyquist FTN system; The complexity index of the FTN system is determined based on the receiver capability information of the at least one terminal. Based on the performance and complexity metrics of the FTN system, design the overall response sequence of the FTN system; Based on the overall response sequence of the FTN system, determine the impulse response sequence of the FTN system's transmitter; Configure the transmitter's transmission filter based on the transmitter's impulse response sequence; The receiver capability information includes at least the length of the tap coefficients of the matched filter; the complexity index includes the length of the overall response sequence of the FTN system; determining the complexity index of the FTN system based on the receiver capability information of the at least one terminal includes: determining the minimum length of the tap coefficients of the matched filter based on the receiver capability information of the at least one terminal; and determining the length of the overall response sequence of the FTN system based on the minimum length of the tap coefficients of the matched filter.

2. The method according to claim 1, characterized in that, Also includes: The overall response sequence of the FTN system or the impulse response sequence of the transmitter is sent to the terminal so that the terminal can determine the impulse response sequence of the receiver and configure the matched filter of the receiver based on the overall response sequence of the FTN system or the impulse response sequence of the transmitter.

3. The method according to claim 1, characterized in that, Also includes: Based on the impulse response sequence of the transmitter, determine the impulse response sequence of the receiver of the FTN system; The impulse response sequence of the receiver is sent to the terminal so that the terminal can configure the matched filter of the receiver according to the impulse response sequence of the receiver.

4. The method according to claim 1, characterized in that, Determining the length of the overall response sequence of the FTN system based on the minimum length of the tap coefficients of the matched filter includes: The length of the overall response sequence of the FTN system is determined to be 2. l -1, where, l This represents the minimum length of the tap coefficients of the matched filter.

5. The method according to claim 1, characterized in that, The performance metrics of the FTN system include at least one of the following: Bit Error Rate (BER), Block Error Rate (BLER), Mutual Information (MI), and System Capacity. The step of designing the overall response sequence of the FTN system based on its performance and complexity metrics includes: Based on the length of the overall response sequence of the FTN system, multiple centrally symmetric candidate overall response sequences are generated; The candidate overall response sequence that satisfies the performance indicators of the FTN system is selected as the overall response sequence of the FTN system.

6. A method for determining a super Nyquist modulation waveform, characterized in that, include: The terminal in the FTN system sends receiver capability information to the base station; The terminal receives indication information of the receiver's impulse response sequence sent by the base station. The indication information includes at least one of the transmitter's impulse response sequence, the overall response sequence of the FTN system, and the receiver's impulse response sequence. The terminal obtains the impulse response sequence of the receiver based on the indication information of the impulse response sequence of the receiver, and configures the matched filter of the receiver based on the impulse response sequence of the receiver. The overall response sequence of the FTN system is determined by the base station based on the receiver capability information of at least one terminal in the FTN system, the complexity index of the FTN system is determined, and then designed based on the performance index and complexity index of the FTN system. The impulse response sequence of the transmitter is determined by the base station based on the overall response sequence of the FTN system.

7. The method according to claim 6, characterized in that, When the indication information is the impulse response sequence of the transmitter or the overall response sequence of the FTN system, the terminal obtains the impulse response sequence of the receiver based on the indication information of the impulse response sequence of the receiver, including: The terminal determines the impulse response sequence of the receiver of the FTN system based on the impulse response sequence of the transmitter or the overall response sequence of the FTN system.

8. A base station, characterized in that, Includes transceivers and processors, among which, The transceiver is used to receive receiver capability information of at least one terminal in the Super Nyquist FTN system; The processor is configured to: determine the complexity index of the FTN system based on the receiver capability information of the at least one terminal; design the overall response sequence of the FTN system based on the performance index and complexity index of the FTN system; determine the impulse response sequence of the transmitter of the FTN system based on the overall response sequence of the FTN system; and configure the transmission filter of the transmitter based on the impulse response sequence of the transmitter. The receiver capability information includes at least the length of the tap coefficients of the matched filter; the complexity index includes the length of the overall response sequence of the FTN system; the processor is further configured to determine the minimum length of the tap coefficients of the matched filter based on the receiver capability information of the at least one terminal; and to determine the length of the overall response sequence of the FTN system based on the minimum length of the tap coefficients of the matched filter.

9. The base station according to claim 8, characterized in that, The transceiver is further configured to send the overall response sequence of the FTN system or the impulse response sequence of the transmitter to the terminal, so that the terminal can determine the impulse response sequence of the receiver and configure the matched filter of the receiver based on the overall response sequence of the FTN system or the impulse response sequence of the transmitter.

10. The base station according to claim 8, characterized in that, The processor is further configured to determine the impulse response sequence of the receiver of the FTN system based on the impulse response sequence of the transmitter; The transceiver is further configured to send the impulse response sequence of the receiver to the terminal, so that the terminal configures the matched filter of the receiver according to the impulse response sequence of the receiver.

11. A base station, characterized in that, include: A processor, a memory, and a program stored in the memory and executable on the processor, wherein the program, when executed by the processor, implements the steps of the method as described in any one of claims 1 to 5.

12. A terminal, characterized in that, Includes transceivers and processors, among which, The transceiver is used to send receiver capability information to the base station; and to receive indication information of the receiver's impulse response sequence sent by the base station, the indication information including at least one of the transmitter's impulse response sequence, the overall response sequence of the FTN system, and the receiver's impulse response sequence. The processor is configured to obtain the impulse response sequence of the receiver based on the indication information of the impulse response sequence of the receiver, and configure the matched filter of the receiver based on the impulse response sequence of the receiver. The overall response sequence of the FTN system is determined by the base station based on the receiver capability information of at least one terminal in the FTN system, the complexity index of the FTN system is determined, and then designed based on the performance index and complexity index of the FTN system. The impulse response sequence of the transmitter is determined by the base station based on the overall response sequence of the FTN system.

13. A terminal, characterized in that, include: A processor, a memory, and a program stored in the memory and executable on the processor, wherein the program, when executed by the processor, implements the steps of the method as described in any one of claims 6 to 7.

14. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the steps of the method as described in any one of claims 1 to 7.

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