Working method and device of fractional space-frequency index modulation mapping based on golden angle modulation

Abstract

The invention relates to the technical field of wireless communication, and discloses a working method and device for fractional space-frequency index modulation mapping based on golden angle modulation. According to the method, subcarriers and information bits are grouped at a sending end, and each group of sending information is jointly mapped into a space-frequency resource unit index and a golden angle constellation diagram symbol through fractional space-frequency index modulation and two kinds of golden angle modulation with different orders, so that space-frequency resource subblocks are obtained. And at a receiving end, estimating a space-frequency resource unit activation index and a golden angle constellation diagram symbol by adopting a maximum likelihood detection algorithm, and finally recovering to obtain original information through demodulation and mapping. Golden angle modulation is introduced into a space-frequency index modulation system, so that the system complexity is reduced under the condition that the spectrum efficiency is not reduced. Moreover, by adopting two kinds of golden angle modulation with different orders, the decimal bit problem is solved, so that the number of transmitting antennas and the number of subcarriers are not limited by the power of 2 any more.

Description

Technical Field

[0001] The present application relates to the field of wireless communication technology, and in particular to a working method and device for fractional space-frequency index modulation mapping based on golden angle modulation. Background Art

[0002] With the development of wireless communication technology, more devices are connected to mobile networks, and new services and applications are constantly emerging, leading to a surge in mobile users and a sharp increase in data traffic. Existing mobile communication networks are facing huge challenges. Index modulation introduces a new dimension to transmit information, which has the advantages of high energy efficiency, high frequency efficiency, low power consumption and low complexity, and meets the requirements of the next generation of mobile communications for physical layer modulation technology. Index modulation has been applied to the spatial domain, frequency domain, space-frequency domain, etc., using the transmit antenna index, subcarrier index, space-frequency resource unit index, etc. to carry additional information, thereby improving spectrum efficiency. However, the mapping of bits to symbols is limited to the power of 2, that is, the modulation order and the number of transmission resources must meet the power of 2. Summary of the invention

[0003] The present application provides a working method for fractional space-frequency index modulation mapping based on golden angle modulation to solve the problem in the prior art that the mapping of bits to symbols is limited to a power of 2.

[0004] Correspondingly, the present application also provides a working device for fractional space-frequency index modulation mapping based on golden angle modulation, which is used to ensure the implementation and application of the above method.

[0005] In order to solve the above technical problems, the present application discloses a working method of fractional space-frequency index modulation mapping based on golden angle modulation. At the transmitting end, the method includes:

[0006] Divide the original information and subcarriers into multiple groups to obtain multiple groups of transmission information;

[0007] Through fractional space-frequency index modulation and two golden angle modulations of different orders, each group of transmitted information is jointly mapped into a space-frequency resource unit index and a golden angle constellation symbol to obtain a space-frequency resource sub-block;

[0008] Map all space-frequency resource sub-blocks to the transmitting antennas through the space-frequency mapper to obtain the target transmission signal;

[0009] The target transmission signal is sent to the receiving end through the transmitting antenna.

[0010] The present application also discloses a working method of fractional space-frequency index modulation mapping based on golden angle modulation. At the receiving end, the method includes:

[0011] receiving a target transmission signal from a transmitting end through a receiving antenna;

[0012] The target transmission signal is grouped by a receiving signal splitter to obtain a plurality of space-frequency resource sub-blocks;

[0013] For each space-frequency resource sub-block, the maximum likelihood detection algorithm is used to estimate the space-frequency resource unit activation index and the golden angle constellation symbol, and the corresponding transmission information is obtained by demodulation and demapping;

[0014] Original information is obtained based on multiple sets of sent information.

[0015] The present application also discloses a working device for fractional space-frequency index modulation mapping based on golden angle modulation, which is applied to a transmitting end, and the device includes:

[0016] An information grouping module, used to divide the original information and subcarriers into multiple groups to obtain multiple groups of transmission information;

[0017] An information modulation module is used to jointly map each group of transmitted information into a space-frequency resource unit index and a golden angle constellation symbol through fractional space-frequency index modulation and two golden angle modulations of different orders to obtain a space-frequency resource sub-block;

[0018] An information conversion module is used to map all space-frequency resource sub-blocks to the transmitting antenna through a space-frequency mapper to obtain a target transmission signal;

[0019] The information sending module is used to send the target transmission signal to the receiving end through the sending antenna.

[0020] The present application also discloses a working device for fractional space-frequency index modulation mapping based on golden angle modulation, which is applied to a receiving end, and the device includes:

[0021] An information receiving module, used for receiving a target transmission signal from a transmitting end through a receiving antenna;

[0022] An information conversion module, configured to group the target transmission signal through a receiving signal splitter to obtain a plurality of space-frequency resource sub-blocks;

[0023] An information demodulation module is used to estimate the space-frequency resource unit activation index and the golden angle constellation symbol for each space-frequency resource sub-block using a maximum likelihood detection algorithm, and obtain the corresponding transmission information by demodulation and demapping;

[0024] The information combination module is used to obtain original information based on multiple groups of sent information.

[0025] In the present application, the subcarriers and information bits are grouped at the transmitting end to obtain multiple groups of transmission information. Each group of transmission information is jointly mapped into a space-frequency resource unit index and a golden angle constellation symbol through fractional space-frequency index modulation and two golden angle modulations of different orders to obtain a space-frequency resource sub-block. At the receiving end, the orthogonal frequency division multiplexing signal is grouped by a receiving signal splitter to obtain multiple space-frequency resource sub-blocks by using the opposite operation to the transmitting end; for each space-frequency resource sub-block, the maximum likelihood detection algorithm is used to estimate the space-frequency resource unit activation index and the golden angle constellation symbol, and the original information is finally restored by demodulation and mapping. In the present application, golden angle modulation is introduced into the space-frequency index modulation system, and the activation space-frequency index unit index and the golden angle modulation constellation symbol are jointly mapped, which reduces the system complexity without reducing the spectrum efficiency. And by using two golden angle modulations of different orders, the fractional bit problem is solved, so that the number of transmitting antennas and subcarriers is no longer limited to the power of 2.

[0026] Additional aspects and advantages of the present application will be given in the following description, which will become apparent from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0028] Figure 1 A flowchart of a working method of fractional space-frequency index modulation mapping based on golden angle modulation provided in an embodiment of the present application;

[0029] Figure 2 A schematic block diagram of a system of a transmitting end provided in an embodiment of the present application;

[0030] Figure 3 A schematic block diagram of a receiving end system provided in an embodiment of the present application;

[0031] Figure 4 A simulation diagram of the system bit error rate performance when the spectrum efficiency is 9 bit / s / Hz provided in an embodiment of the present application;

[0032] Figure 5 A simulation diagram of system bit error rate performance under different spectrum efficiencies provided by an embodiment of the present application;

[0033] Figure 6 A schematic diagram of the structure of a working device for fractional space-frequency index modulation mapping based on golden angle modulation applied to a transmitting end provided in an embodiment of the present application;

[0034] Figure 7A schematic diagram of the structure of a working device for fractional space-frequency index modulation mapping based on golden angle modulation applied to a receiving end provided in an embodiment of the present application. DETAILED DESCRIPTION

[0035] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be interpreted as limiting the present application.

[0036] It will be understood by those skilled in the art that, unless expressly stated, the singular forms "one", "said", and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present application refers to the presence of features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof. It should be understood that when we refer to an element as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other element, or there may be an intermediate element. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The term "and / or" used herein includes all or any unit and all combinations of one or more associated listed items.

[0037] Those skilled in the art will appreciate that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those generally understood by those skilled in the art in the field to which the present invention belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have meanings consistent with the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as here.

[0038] The solution provided in the embodiments of the present application can be executed by any electronic device, such as a terminal device or a server, wherein the server can be an independent physical server, a server cluster or a distributed system composed of multiple physical servers, or a cloud server that provides cloud computing services. The terminal can be a smart phone, a tablet computer, a laptop computer, a desktop computer, a smart speaker, a smart watch, etc., but is not limited to this. The terminal and the server can be directly or indirectly connected via wired or wireless communication, and the present application does not limit this. With respect to the technical problems existing in the prior art, the working method and device of fractional space-frequency index modulation mapping based on golden angle modulation provided in the present application are intended to solve at least one of the technical problems of the prior art.

[0039] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0040] The present application embodiment provides a possible implementation method, such as Figure 1 As shown, a flowchart of a working method of fractional space-frequency index modulation mapping based on golden angle modulation is provided. The scheme can be executed by any electronic device, and optionally, can be executed on a server side or a terminal device.

[0041] like Figure 1 As shown in , at the sending end, the method may include the following steps:

[0042] Step 111, dividing the original information and subcarriers into multiple groups to obtain multiple groups of transmission information;

[0043] Step 112, jointly mapping each group of transmitted information into a space-frequency resource unit index and a golden angle constellation symbol through fractional space-frequency index modulation and two golden angle modulations of different orders, to obtain a space-frequency resource sub-block;

[0044] Step 113, mapping all space-frequency resource sub-blocks to the transmitting antennas through a space-frequency mapper to obtain a target transmission signal;

[0045] Step 114, sending the target transmission signal to the receiving end through the transmitting antenna.

[0046] Golden angle modulation can maintain symmetrical distribution regardless of whether the constellation size is an integer power of 2. Introducing golden angle modulation into the index modulation system, the transmission resource index and modulation symbol are jointly mapped to improve the flexibility and adaptability of the system.

[0047] In an embodiment of the present application, the transmitting end groups subcarriers and information bits to obtain multiple groups of transmission information, and through fractional space-frequency index modulation and two golden angle modulations of different orders, jointly maps each group of transmission information into space-frequency resource unit indexes and golden angle constellation symbols to obtain space-frequency resource subblocks, and then demodulates and recovers the target transmission signal at the receiving end to obtain the original information. In an embodiment of the present application, golden angle modulation is introduced into the space-frequency index modulation system, and the activated space-frequency index unit index and the golden angle modulation constellation symbol are jointly mapped, thereby reducing the system complexity without reducing the spectrum efficiency. In addition, by adopting two golden angle modulations of different orders, the problem of fractional bits is solved, so that the number of transmitting antennas and subcarriers is no longer limited to powers of 2.

[0048] In an optional embodiment, the original information and the subcarriers are divided into multiple groups to obtain multiple groups of transmission information, including:

[0049] The original information and subcarriers are evenly divided into multiple groups to obtain multiple groups of transmission information;

[0050] The number of bits and subcarriers of each group of transmitted information is the same.

[0051] like Figure 2 As shown, the system in the embodiment of the present application includes N t Transmitting antennas, N r Root receiving antennas, N subcarriers. For one information transmission, b bits of original information are divided into G groups, each group of transmitted information includes p bits and n subcarriers, p = b / G, n = N / G.

[0052] In an optional embodiment, each group of transmitted information is jointly mapped into a space-frequency resource unit index and a golden angle constellation symbol through fractional space-frequency index modulation and two golden angle modulations of different orders to obtain a space-frequency resource sub-block, including:

[0053] According to the transmission rate, the division of space-frequency resource units and two different golden angle modulation orders are determined;

[0054] Based on the division of space-frequency resource units and two different golden angle modulation orders, the transmission information is modulated and mapped to obtain space-frequency resource sub-blocks.

[0055] Each group of transmitted information bits is mapped into a space-frequency resource subblock through fractional space-frequency index modulation (FSFIM) and golden angle modulation (GAM), which contains n subcarriers and nN t Space frequency resource units, where n = N / G. Figure 2 As shown, modulation and mapping of transmitted information are implemented through a space-frequency resource unit index mapper and a golden angle modulator, and a space-frequency resource sub-block is obtained through a space-frequency resource sub-block generator.

[0056] In one space-frequency resource sub-block, the transmitted information is jointly mapped to the activated space-frequency resource unit index and the GAM constellation symbol. G groups of information bits adopt the same mapping method to obtain G space-frequency resource sub-blocks.

[0057] Specifically, for each space-frequency resource subblock, the subcarrier, transmit antenna index, and GAM symbol are considered as a whole and jointly mapped. p possible transmission vectors. Two golden angle modulations of different orders are used to solve the problem of fractional bits and overcome the limitation of the number of transmitting antennas and subcarriers to the power of 2.

[0058] In an optional embodiment, the space-frequency resource units are divided into:

[0059]

[0060] n2=nN t -n1

[0061] Two different golden angle modulation orders are:

[0062]

[0063]

[0064] The first n1 space-frequency resource units are used to send M1-order golden angle constellation symbols, and the last n2 space-frequency resource units are used to send M2-order golden angle constellation symbols; p is the number of bits of information sent by the group; n is the number of subcarriers in a group; N t is the number of transmitting antennas; nN t The number of space-frequency resource units corresponding to the information sent for this group.

[0065] In an optional embodiment, the transmission information is modulated and mapped based on the division of the space-frequency resource unit and two different golden angle modulation orders to obtain the space-frequency resource sub-block, including:

[0066] Using two different golden angle modulation orders, the transmitted information is modulated at the golden angle to obtain the golden angle constellation symbols corresponding to the two orders:

[0067] The mth constellation point is represented by where r m is the amplitude of the mth constellation point, is the golden angle, m∈{1,2,...,M}, M is the order of the GAM constellation, M∈{M1,M2}; the transmission probability of the mth constellation point is p m , considering the uniform distribution of the golden angle modulation constellation points, that is, the probability of the constellation points is equal, that is, p m =1 / M; therefore, the amplitude of the mth constellation point is expressed as in is the average power of the constellation;

[0068] The first n1 space-frequency resource units are used to send golden angle constellation symbols of M1 order, and the last n2 space-frequency resource units are used to send golden angle constellation symbols of M2 order, so as to obtain space-frequency resource sub-blocks.

[0069] In the embodiment of the present application, for the g-th space-frequency resource sub-block, the transmission information is represented as including nN t A vector of elements, that is The number of bits transmitted is p, then there are 2 ppossible transmission vectors, which are expressed as:

[0070]

[0071] in i=1,2,…,M1, j=1,2,…,M2, and Represent the M1 and M2 order GAM constellation symbol sets respectively.

[0072] In a space-frequency resource sub-block, the first n1 space-frequency resource units send M1-order GAM constellation symbols, and the next n2 space-frequency resource units send M2-order GAM constellation symbols, where n1, n2, M1, and M2 satisfy n1M1+n2M2=2 p and n1+n2=N t .

[0073] Therefore, the space-frequency resource unit division is expressed as and n2=nN t -n1, two different GAM orders are expressed as and

[0074] After information bit modulation mapping, the transmission vector x of the space-frequency resource sub-block is obtained. g , x g There is only one non-zero value in the space-frequency resource sub-block, and the position and size of the non-zero value are determined by the input information bit. g Converted to matrix form, that is:

[0075]

[0076] In the embodiment of the present application, after modulation and mapping, G groups of transmitted information obtain G space-frequency resource sub-blocks.

[0077] In an optional embodiment, mapping all space-frequency resource sub-blocks to transmit antennas through a space-frequency mapper to obtain a target transmission signal includes:

[0078] Mapping all space-frequency resource sub-blocks to the transmitting antennas through the space-frequency mapper to obtain an orthogonal frequency division multiplexing (OFDM) signal corresponding to each transmitting antenna;

[0079] Perform inverse fast Fourier transform operation on the OFDM signal to obtain a time domain signal;

[0080] A cyclic prefix is ​​added to the time domain signal to obtain the target transmission signal.

[0081] In the present application embodiment, Figure 2As shown, G space-frequency resource sub-blocks are passed through a space-frequency mapper to form an OFDM signal block X = [X1 X2 ... X G ]. After generating the OFDM signal block, perform an N-point inverse fast Fourier transform (IFFT) operation on X to convert the frequency domain signal into a time domain signal, and then add a cyclic prefix to the time domain signal to alleviate inter-signal interference and inter-channel interference, thereby obtaining the target transmission signal. The obtained target transmission signal is then transmitted to the receiving end through the transmitting antenna. It is assumed that the subcarriers are independent of each other, and the channel between each transmitting and receiving antenna pair is a Rayleigh fading channel.

[0082] The embodiment of the present application further provides a working method of fractional space-frequency index modulation mapping based on golden angle modulation. At the receiving end, the method includes:

[0083] Step 121, receiving a target transmission signal from a transmitting end through a receiving antenna;

[0084] Step 122, grouping the target transmission signal by a receiving signal splitter to obtain a plurality of space-frequency resource sub-blocks;

[0085] Step 123, for each space-frequency resource sub-block, a maximum likelihood detection algorithm is used to estimate the space-frequency resource unit activation index and the golden angle constellation symbol, and corresponding transmission information is obtained by demodulation and demapping;

[0086] Step 124, obtaining original information based on multiple groups of sent information.

[0087] In an embodiment of the present application, the subcarriers and information bits are grouped at the transmitting end to obtain multiple groups of transmission information, and each group of transmission information is jointly mapped into a space-frequency resource unit index and a golden angle constellation symbol through fractional space-frequency index modulation and two golden angle modulations of different orders to obtain a space-frequency resource sub-block. At the receiving end, the orthogonal frequency division multiplexing signal is grouped by a receiving signal splitter to obtain multiple space-frequency resource sub-blocks by using the opposite operation to the transmitting end; for each space-frequency resource sub-block, the maximum likelihood detection algorithm is used to estimate the space-frequency resource unit activation index and the golden angle constellation symbol, and the original information is finally restored by demodulation and mapping. In an embodiment of the present application, golden angle modulation is introduced into the space-frequency index modulation system, and the activation space-frequency index unit index and the golden angle modulation constellation symbol are jointly mapped, thereby reducing the system complexity without reducing the spectrum efficiency. And by using two golden angle modulations of different orders, the problem of fractional bits is solved, so that the number of transmitting antennas and subcarriers is no longer limited to the power of 2.

[0088] In an optional embodiment, if Figure 3 As shown, the orthogonal frequency division multiplexing signal is grouped by a receiving signal splitter to obtain multiple space-frequency resource sub-blocks, including:

[0089] Remove the cyclic prefix of the target transmission signal to obtain a time domain signal;

[0090] Performing a fast Fourier transform operation on the time domain signal to obtain an orthogonal frequency division multiplexing signal;

[0091] Specifically, the time domain signal is converted into a frequency domain signal through an N-point fast Fourier transform (FFT) operation, thereby obtaining an orthogonal frequency division multiplexing signal, which is expressed as Y = [Y1 Y2 ... Y G ].

[0092] The OFDM signal is divided into groups by a receiving signal splitter to obtain a plurality of space-frequency resource sub-blocks.

[0093] In the embodiment of the present application, a total of G space-frequency resource sub-blocks can be obtained. For the g-th space-frequency resource sub-block, the input-output relationship is expressed as:

[0094]

[0095] Among them, y g is the received signal vector, H g is the corresponding block diagonal channel matrix, x g is the transmitted signal vector, w g is the noise vector. is the signal received on the φth subcarrier, is the channel matrix corresponding to the φth subcarrier, is the signal sent on the φth subcarrier, is the noise on the φth subcarrier, represents the set of complex numbers, φ=1,2,…,n.

[0096] In an optional embodiment, for each space-frequency resource sub-block, a maximum likelihood detection algorithm is used to estimate the space-frequency resource unit activation index and the golden angle constellation symbol, and corresponding transmission information is obtained by demodulation and demapping, specifically including:

[0097] like Figure 3 As shown, the receiving end detects the received signal using a maximum likelihood (ML) detector. For the g-th group of space-frequency resource sub-blocks, by searching all possible transmission vectors, the activated space-frequency resource units and GAM constellation symbols are jointly decided to obtain the optimal detection result.

[0098] Among them, the ML detector uses the maximum likelihood detection algorithm to detect the received signal, and the ML detection is expressed as:

[0099]

[0100] where ||·|| 2It means to find the square norm of the vector, and argmin means to find the minimum value among all the square norm values. The estimated signal vector is further processed by the demapper Demo and demap to restore the original information bits.

[0101] A comparative experiment was conducted between the method used in the examples of the present application (GAM-FSFIM) and the traditional method (SFIM). Figure 4 This is the simulation diagram of the system bit error rate performance when the spectrum efficiency is 9 bit / s / Hz. Figure 4 It can be seen that the method in the embodiment of the present application has significantly better bit error rate performance than the traditional space-frequency index modulation (SFIM) system in the medium and high signal-to-noise ratio range.

[0102] For the proposed method (GAM-FSFIM), the bit error rate performance under different spectrum efficiencies is also simulated in the embodiments of the present application. Figure 5 The simulation diagram of system bit error rate performance under different spectrum efficiencies is shown in Figure 2. Figure 5 It shows that the corresponding space-frequency resource unit division method and GAM order can be selected according to the spectrum efficiency requirements to effectively improve flexibility.

[0103] Based on the same principle as the method of the transmitting end provided in the embodiment of the present application, the embodiment of the present application also provides a working device of fractional space-frequency index modulation mapping based on golden angle modulation, which is applied to the transmitting end, such as Figure 6 As shown, the device comprises:

[0104] An information grouping module 601 is used to group original information and subcarriers into multiple groups to obtain multiple groups of transmission information;

[0105] The information modulation module 602 is used to jointly map each group of transmitted information into a space-frequency resource unit index and a golden angle constellation symbol through fractional space-frequency index modulation and two golden angle modulations of different orders to obtain a space-frequency resource sub-block;

[0106] An information conversion module 603 is used to map all space-frequency resource sub-blocks to the transmitting antennas through a space-frequency mapper to obtain a target transmission signal;

[0107] The information sending module 604 is used to send the target transmission signal to the receiving end through the sending antenna.

[0108] In an embodiment of the present application, the transmitting end groups subcarriers and information bits to obtain multiple groups of transmission information, and through fractional space-frequency index modulation and two different orders of golden angle modulation, each group of transmission information is jointly mapped to a space-frequency resource unit index and a golden angle constellation diagram symbol to obtain a space-frequency resource sub-block, and then the target transmission signal is demodulated and restored at the receiving end to obtain the original information. In an embodiment of the present application, golden angle modulation is introduced into the space-frequency index modulation system, and the activated space-frequency index unit index and the golden angle modulation constellation diagram symbol are jointly mapped, which reduces the system complexity without reducing the spectrum efficiency. And by adopting two different orders of golden angle modulation, the problem of fractional bits is solved, so that the number of transmitting antennas and subcarriers is no longer limited to the power of 2.

[0109] The working device of fractional space-frequency index modulation mapping based on golden angle modulation provided in the embodiment of the present application can achieve Figures 1 to 5 To avoid repetition, the various processes implemented in the method embodiment are not described here.

[0110] The working device of fractional space-frequency index modulation mapping based on golden angle modulation in the embodiment of the present application can execute the working method of fractional space-frequency index modulation mapping based on golden angle modulation provided in the embodiment of the present application, and its implementation principle is similar. The actions performed by each module and unit in the working device of fractional space-frequency index modulation mapping based on golden angle modulation in each embodiment of the present application correspond to the steps of the transmitting end in the working method of fractional space-frequency index modulation mapping based on golden angle modulation in each embodiment of the present application. For the detailed functional description of each module of the working device of fractional space-frequency index modulation mapping based on golden angle modulation, please refer to the description in the corresponding working method of fractional space-frequency index modulation mapping based on golden angle modulation shown in the previous text, which will not be repeated here.

[0111] Based on the same principle as the method of the receiving end provided in the embodiment of the present application, the embodiment of the present application also provides a working device for fractional space-frequency index modulation mapping based on golden angle modulation, which is applied to the receiving end, such as Figure 7 As shown, the device comprises:

[0112] The information receiving module 701 is used to receive the target transmission signal from the transmitting end through the receiving antenna;

[0113] The information conversion module 702 is used to group the target transmission signal through a receiving signal splitter to obtain multiple space-frequency resource sub-blocks;

[0114] The information demodulation module 703 is used to estimate the space-frequency resource unit activation index and the golden angle constellation symbol for each space-frequency resource sub-block using the maximum likelihood detection algorithm, and obtain the corresponding transmission information by demodulation and demapping;

[0115] The information combining module 704 is used to obtain original information based on multiple groups of sent information.

[0116] In an embodiment of the present application, the subcarriers and information bits are grouped at the transmitting end to obtain multiple groups of transmission information, and each group of transmission information is jointly mapped into a space-frequency resource unit index and a golden angle constellation symbol through fractional space-frequency index modulation and two golden angle modulations of different orders to obtain a space-frequency resource sub-block. At the receiving end, the orthogonal frequency division multiplexing signal is grouped by a receiving signal splitter to obtain multiple space-frequency resource sub-blocks by using the opposite operation to the transmitting end; for each space-frequency resource sub-block, the maximum likelihood detection algorithm is used to estimate the space-frequency resource unit activation index and the golden angle constellation symbol, and the original information is finally restored by demodulation and mapping. In an embodiment of the present application, golden angle modulation is introduced into the space-frequency index modulation system, and the activation space-frequency index unit index and the golden angle modulation constellation symbol are jointly mapped, thereby reducing the system complexity without reducing the spectrum efficiency. And by using two golden angle modulations of different orders, the problem of fractional bits is solved, so that the number of transmitting antennas and subcarriers is no longer limited to the power of 2.

[0117] The working device of fractional space-frequency index modulation mapping based on golden angle modulation provided in the embodiment of the present application can achieve Figures 1 to 5 To avoid repetition, the various processes implemented in the method embodiment are not described here.

[0118] The working device of fractional space-frequency index modulation mapping based on golden angle modulation in the embodiment of the present application can execute the working method of fractional space-frequency index modulation mapping based on golden angle modulation provided in the embodiment of the present application, and its implementation principle is similar. The actions performed by each module and unit in the working device of fractional space-frequency index modulation mapping based on golden angle modulation in each embodiment of the present application correspond to the steps of the transmitting end in the working method of fractional space-frequency index modulation mapping based on golden angle modulation in each embodiment of the present application. For the detailed functional description of each module of the working device of fractional space-frequency index modulation mapping based on golden angle modulation, please refer to the description in the corresponding working method of fractional space-frequency index modulation mapping based on golden angle modulation shown in the previous text, which will not be repeated here.

[0119] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of disclosure involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above disclosed concept. For example, the above features are replaced with the technical features with similar functions disclosed in this application (but not limited to) by each other to form a technical solution.

Claims

1. A working method of fractional space-frequency index modulation mapping based on golden angle modulation, characterized in that: The method comprises: Divide the original information and subcarriers into multiple groups to obtain multiple groups of transmission information; Through fractional space-frequency index modulation and two golden angle modulations of different orders, each group of transmitted information is jointly mapped into a space-frequency resource unit index and a golden angle constellation symbol to obtain a space-frequency resource sub-block; Map all space-frequency resource sub-blocks to the transmitting antennas through the space-frequency mapper to obtain the target transmission signal; The target transmission signal is sent to the receiving end through the transmitting antenna.

2. The working method of fractional space-frequency index modulation mapping based on golden angle modulation according to claim 1, characterized in that: The method of jointly mapping each group of transmitted information into a space-frequency resource unit index and a golden angle constellation symbol through fractional space-frequency index modulation and two golden angle modulations of different orders to obtain a space-frequency resource sub-block includes: Determining the division of the space-frequency resource unit and two different golden angle modulation orders according to the transmission rate; The transmission information is modulated and mapped based on the division of space-frequency resource units and two different golden angle modulation orders to obtain space-frequency resource sub-blocks.

3. The working method of fractional space-frequency index modulation mapping based on golden angle modulation according to claim 2 is characterized in that: The space-frequency resource units are divided into: n2=nN t -n1 Two different golden angle modulation orders are: The first n1 space-frequency resource units are used to send M1-order golden angle constellation symbols, and the last n2 space-frequency resource units are used to send M2-order golden angle constellation symbols; p is the number of bits of information to be sent; n is the number of subcarriers in a group; N t is the number of transmitting antennas; nN t The number of space-frequency resource units corresponding to the information sent for this group.

4. The working method of fractional space-frequency index modulation mapping based on golden angle modulation according to claim 3 is characterized in that: The step of performing modulation mapping on the transmission information based on the division of the space-frequency resource unit and two different golden angle modulation orders to obtain the space-frequency resource sub-block includes: Using two different golden angle modulation orders, the transmitted information is subjected to golden angle modulation to obtain golden angle constellation diagram symbols corresponding to the two orders: The mth constellation point is represented by where r m is the amplitude of the mth constellation point, is the golden angle, m∈{1,2,...,M}, M is the order of the GAM constellation, M∈{M1,M2}; the transmission probability of the mth constellation point is p m , p m =1 / M; the amplitude of the mth constellation point is expressed as in is the average power of the constellation; The space-frequency resource sub-block is obtained by using the first n1 space-frequency resource units to send M1-order golden angle constellation symbols and using the last n2 space-frequency resource units to send M2-order golden angle constellation symbols.

5. The working method of fractional space-frequency index modulation mapping based on golden angle modulation according to claim 1, characterized in that: The step of dividing the original information and the subcarriers into multiple groups to obtain multiple groups of transmission information includes: Dividing the original information and subcarriers into multiple groups evenly to obtain multiple groups of transmission information; The number of bits and subcarriers of each group of transmitted information is the same.

6. The working method of fractional space-frequency index modulation mapping based on golden angle modulation according to claim 1, characterized in that: The step of mapping all space-frequency resource sub-blocks to the transmitting antennas through the space-frequency mapper to obtain the target transmission signal includes: Mapping all space-frequency resource sub-blocks to the transmitting antennas through the space-frequency mapper to obtain an orthogonal frequency division multiplexing signal corresponding to each transmitting antenna; Performing an inverse fast Fourier transform operation on the orthogonal frequency division multiplexing signal to obtain a time domain signal; A cyclic prefix is ​​added to the time domain signal to obtain the target transmission signal.

7. A working method of fractional space-frequency index modulation mapping based on golden angle modulation, characterized in that: The method comprises: receiving a target transmission signal from a transmitting end through a receiving antenna; The target transmission signal is grouped by a receiving signal splitter to obtain a plurality of space-frequency resource sub-blocks; For each space-frequency resource sub-block, the maximum likelihood detection algorithm is used to estimate the space-frequency resource unit activation index and the golden angle constellation symbol, and the corresponding transmission information is obtained by demodulation and demapping; Original information is obtained based on multiple sets of sent information.

8. The working method of fractional space-frequency index modulation mapping based on golden angle modulation according to claim 6, characterized in that: The step of grouping the target transmission signal by a receiving signal splitter to obtain a plurality of space-frequency resource sub-blocks includes: Removing a cyclic prefix of the target transmission signal to obtain a time domain signal; Performing a fast Fourier transform operation on the time domain signal to obtain an orthogonal frequency division multiplexing signal; The orthogonal frequency division multiplexing signal is grouped by a receiving signal splitter to obtain a plurality of space-frequency resource sub-blocks.

9. A working device for fractional space-frequency index modulation mapping based on golden angle modulation, characterized in that: The device comprises: An information grouping module, used to divide the original information and subcarriers into multiple groups to obtain multiple groups of transmission information; An information modulation module is used to jointly map each group of transmitted information into a space-frequency resource unit index and a golden angle constellation symbol through fractional space-frequency index modulation and two golden angle modulations of different orders to obtain a space-frequency resource sub-block; An information conversion module is used to map all space-frequency resource sub-blocks to the transmitting antenna through a space-frequency mapper to obtain a target transmission signal; The information sending module is used to send the target transmission signal to the receiving end through the sending antenna.

10. A working device for fractional space-frequency index modulation mapping based on golden angle modulation, characterized in that: The device comprises: An information receiving module, used for receiving a target transmission signal from a transmitting end through a receiving antenna; An information conversion module, configured to group the target transmission signal through a receiving signal splitter to obtain a plurality of space-frequency resource sub-blocks; An information demodulation module is used to estimate the space-frequency resource unit activation index and the golden angle constellation symbol for each space-frequency resource sub-block using a maximum likelihood detection algorithm, and obtain the corresponding transmission information by demodulation and demapping; The information combination module is used to obtain original information based on multiple groups of sent information.

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