Diversity transmission method, terminal and network side equipment

Abstract

The present application discloses a diversity transmission method, a terminal, and a network-side device, which belongs to the field of communication technology. The diversity transmission method of the embodiment of the present application includes: the terminal determines a target coding codeword; the terminal performs diversity transmission based on the target coding codeword; wherein the target coding codeword satisfies a target coding structure; the target coding codeword is a coding matrix with a dimension of N×N; N=2 k , k is a positive integer; the target coding structure includes: a first basis element, a second basis element, a first generating element and a second generating element; the first generating element is the opposite number of the conjugate operation result of the first basis element, and the second generating element is the conjugate operation result of the second basis element; the first basis element, the second basis element, the first generating element and the second generating element are complex numbers or block matrices.

Description

Technical Field

[0001] The present application belongs to the field of communication technology, and specifically relates to a diversity transmission method, a terminal, and a network-side device. Background Art

[0002] With the development of mobile communication technology, communication networks need to support the massive interconnection of everything. This massive number of Internet of Things (IoT) devices poses new challenges in terms of cost and power consumption. Consequently, the main trends in the development of IoT devices include cellular networking, low cost, low power consumption, and even zero-power passive devices. However, traditional passive terminals are limited by their power consumption and hardware capabilities, with transmission distances typically under 10 meters, far short of the 100-meter coverage goal of cellular communication. Backscatter communication technology can effectively extend the communication range of IoT devices. Backscatter communication refers to the use of radio frequency signals from other devices or the environment to modulate the signal and transmit its own information.

[0003] In related technologies, space-time block coding (STBC) is used to introduce signal redundancy in the space and time domains. By rationally constructing a block coding transmission matrix, diversity gain and antenna gain are achieved without increasing bandwidth. Among them, although the orthogonal space-time block coding (OSTBC) codebook can achieve full diversity gain and full rate, this type of codebook is only applicable to two-antenna transmit diversity scenarios. The quasi-orthogonal space-time block coding (QSTBC) codebook can be extended to transmit diversity scenarios with more than two antennas, and can achieve a diversity gain slightly less than the full diversity gain while also achieving the full rate.

[0004] In practice, since backscatter communication controls the amplitude or phase of the signal by changing the load impedance, and considering the non-ideal conditions of other factors in the backscatter communication modulation circuit, there will be more or less errors in the amplitude or phase of the output signal; however, both OSTBC and QSTBC diversity schemes are designed for traditional active RF communication and do not consider the modulation characteristics of passive terminals such as backscatter communication. When OSTBC and QSTBC diversity schemes are applied to backscatter communication, there are problems with high system implementation complexity and high probability of detection errors. Summary of the Invention

[0005] The embodiments of the present application provide a diversity transmission method, a terminal, and a network-side device, which can solve the problems of high system implementation complexity and high probability of detection errors.

[0006] In a first aspect, a diversity transmission method is provided, applied to a terminal, the method comprising:

[0007] The terminal determines the target encoding codeword;

[0008] The terminal performs diversity transmission based on the target coding codeword;

[0009] Wherein, the target coding codeword satisfies the target coding structure; the target coding codeword is a coding matrix with a dimension of N×N; N=2 k , k is a positive integer;

[0010] The target coding structure includes: a first basic element, a second basic element, a first generating element, and a second generating element; the first generating element is the opposite number of the conjugate operation result of the first basic element, and the second generating element is the conjugate operation result of the second basic element; the first basic element, the second basic element, the first generating element, and the second generating element are complex numbers or block matrices.

[0011] In a second aspect, a diversity transmission method is provided, which is applied to a network-side device. The method includes:

[0012] The network side device determines the target encoding codeword;

[0013] The network side device sends first indication information to the terminal; wherein the first indication information is used to indicate the target encoding codeword;

[0014] Wherein, the target coding codeword satisfies the target coding structure; the target coding codeword is a coding matrix with a dimension of N×N; N=2 k , k is a positive integer; the target coding structure includes: a first basis element, a second basis element, a first generating element and a second generating element; the first generating element is the opposite number of the conjugate operation result of the first basis element, and the second generating element is the conjugate operation result of the second basis element; the first basis element, the second basis element, the first generating element and the second generating element are complex numbers or block matrices.

[0015] In a third aspect, a diversity transmission device is provided, applied to a terminal, the device including:

[0016] A first determination module is used to determine a target encoding codeword;

[0017] a transmission module, configured to perform diversity transmission based on the target coding codeword;

[0018] Wherein, the target coding codeword satisfies the target coding structure; the target coding codeword is a coding matrix with a dimension of N×N; N=2 k, k is a positive integer; the target coding structure includes: a first basis element, a second basis element, a first generating element and a second generating element; the first generating element is the opposite number of the conjugate operation result of the first basis element, and the second generating element is the conjugate operation result of the second basis element; the first basis element, the second basis element, the first generating element and the second generating element are complex numbers or block matrices.

[0019] In a fourth aspect, a diversity transmission device is provided, which is applied to a network-side device. The device includes:

[0020] A second determination module is used to determine the target encoding codeword;

[0021] A first sending module is configured to send first indication information to a terminal; wherein the first indication information is used to indicate the target encoding codeword;

[0022] Wherein, the target coding codeword satisfies the target coding structure; the target coding codeword is a coding matrix with a dimension of N×N; N=2 k , k is a positive integer; the target coding structure includes: a first basis element, a second basis element, a first generating element and a second generating element; the first generating element is the opposite number of the conjugate operation result of the first basis element, and the second generating element is the conjugate operation result of the second basis element; the first basis element, the second basis element, the first generating element and the second generating element are complex numbers or block matrices.

[0023] In a fifth aspect, a terminal is provided, comprising a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the method described in the first aspect are implemented.

[0024] In a sixth aspect, a terminal is provided, comprising a processor and a communication interface, wherein the processor is configured to determine a target encoding codeword; and the communication interface is configured to perform diversity transmission based on the target encoding codeword.

[0025] Wherein, the target coding codeword satisfies the target coding structure; the target coding codeword is a coding matrix with a dimension of N×N; N=2 k , k is a positive integer; the target coding structure includes: a first basis element, a second basis element, a first generating element and a second generating element; the first generating element is the opposite number of the conjugate operation result of the first basis element, and the second generating element is the conjugate operation result of the second basis element; the first basis element, the second basis element, the first generating element and the second generating element are complex numbers or block matrices.

[0026] In the seventh aspect, a network side device is provided, which includes a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the program or instructions are executed by the processor, the steps of the method described in the second aspect are implemented.

[0027] In an eighth aspect, a network-side device is provided, comprising a processor and a communication interface, wherein the processor is configured to determine a target encoding codeword; the communication interface is configured to send first indication information to a terminal; wherein the first indication information is configured to indicate the target encoding codeword;

[0028] Wherein, the target coding codeword satisfies the target coding structure; the target coding codeword is a coding matrix with a dimension of N×N; N=2 k , k is a positive integer;

[0029] The target coding structure includes: a first basic element, a second basic element, a first generating element, and a second generating element; the first generating element is the opposite number of the conjugate operation result of the first basic element, and the second generating element is the conjugate operation result of the second basic element; the first basic element, the second basic element, the first generating element, and the second generating element are complex numbers or block matrices.

[0030] In the ninth aspect, a diversity transmission system is provided, comprising: a terminal and a network side device, wherein the terminal can be used to execute the steps of the diversity transmission method as described in the first aspect, and the network side device can be used to execute the steps of the diversity transmission method as described in the second aspect.

[0031] In the tenth aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method described in the second aspect are implemented.

[0032] In the eleventh aspect, a chip is provided, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the method as described in the first aspect, or to implement the method as described in the second aspect.

[0033] In the twelfth aspect, a computer program / program product is provided, which is stored in a storage medium and is executed by at least one processor to implement the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect.

[0034] In an embodiment of the present application, the terminal determines and uses a target coding codeword that satisfies a target coding structure for multi-antenna transmit diversity transmission, where the target coding codeword is a coding matrix with a dimension of N×N; the target coding structure includes: a first basic element, a second basic element, a first generating element, and a second generating element; the first generating element is the opposite of the conjugate operation result of the first basic element, and the second generating element is the conjugate operation result of the second basic element; the first basic element, the second basic element, the first generating element, and the second generating element are complex numbers or block matrices; compared with related technologies, the target coding codeword designed based on the target coding structure in the embodiment of the present application can not only ensure diversity gain, but also reduce the types of reflection coefficients required on each antenna, that is, it can reduce the types of load impedances required on each antenna, thereby reducing the complexity of system implementation and effectively reducing the probability of detection error. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a schematic diagram of a wireless communication system to which embodiments of the present application may be applied;

[0036] Figure 2 This is one of the flow charts of the diversity transmission method provided in the embodiment of the present application;

[0037] Figure 3 This is the second flow chart of the diversity transmission method provided in the embodiment of the present application;

[0038] Figure 4 This is one of the signaling interaction diagrams of the diversity transmission method provided in the embodiment of the present application;

[0039] Figure 5 This is the second signaling interaction diagram of the diversity transmission method provided in the embodiment of the present application;

[0040] Figure 6 This is the third signaling interaction diagram of the diversity transmission method provided in the embodiment of the present application;

[0041] Figure 7 This is the fourth signaling interaction diagram of the diversity transmission method provided in the embodiment of the present application;

[0042] Figure 8 This is one of the structural diagrams of the diversity transmission device provided in the embodiment of the present application;

[0043] Figure 9 This is the second structural diagram of the diversity transmission device provided in an embodiment of the present application;

[0044] Figure 10 is a structural diagram of a communication device provided in an embodiment of the present application;

[0045] Figure 11 is a schematic diagram of the structure of the terminal provided in an embodiment of the present application;

[0046] Figure 12 It is a structural diagram of the network side device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0047] The following will be combined with the accompanying drawings in the embodiments of this application to clearly describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0048] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first" and "second" are generally of the same type, and do not limit the number of objects. For example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0049] It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency Division Multiple Access (SC-FDMA) and other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the technology described can be used for the systems and radio technologies mentioned above, as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for illustrative purposes, and NR terminology is used in most of the following description, but these technologies can also be applied to communication systems other than NR system applications, such as 6th generation (6G) systems. th Generation, 6G) communication system.

[0050] Figure 1 is a schematic diagram of a wireless communication system to which the embodiments of the present application are applicable, Figure 1The wireless communication system shown includes a terminal 11 and a network-side device 12 . Among them, the terminal 11 can be a backscatter communication UE (BSC UE), a mobile phone, a tablet personal computer, a laptop computer or a notebook computer, a personal digital assistant (PDA), a handheld computer, a netbook, an ultra-mobile personal computer (UMPC), a mobile Internet device (MID), an augmented reality (AR) / virtual reality (VR) device, a robot, a wearable device (Wearable Device), a vehicle-mounted device (VUE), a pedestrian terminal (PUE), a smart home (home appliances with wireless communication functions, such as refrigerators, TVs, washing machines or furniture, etc.), a game console, a personal computer (PC), an ATM or a self-service machine and other terminal-side devices. The BSC UE includes: a tag (Tag) in a radio frequency identification (RFID) system, a passive IoT, a semi-passive IoT, etc. Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. It should be noted that the specific type of terminal 11 is not limited in the embodiment of the present application. The network side device 12 may include an access network device or a core network device, wherein the access network device 12 may also be referred to as a radio access network device, a radio access network (RAN), a radio access network function, or a radio access network unit.The access network device 12 may include a base station, a WLAN access point or a WiFi node, etc. The base station may be referred to as a node B, an evolved node B (eNB), an access point, a base transceiver station (Base Transceiver Station, BTS), a radio base station, a radio transceiver, a basic service set (Basic Service Set, BSS), an extended service set (Extended Service Set, ESS), a home B node, a home evolved B node, a transmitting and receiving point (Transmitting Receiving Point, TRP) or other appropriate terms in the field. As long as the same technical effect is achieved, the base station is not limited to a specific technical vocabulary. It should be noted that in the embodiment of the present application, only the base station in the NR system is used as an example for introduction, and the specific type of the base station is not limited.

[0051] The diversity transmission method provided in the embodiment of the present application can be applied to the scenario of multi-antenna transmission diversity transmission, solving the problems of high system implementation complexity and high detection error probability in the related technology. The target coding codeword provided in the embodiment of the present application is a coding matrix with a dimension of N×N; N=2 k , k is a positive integer; the target coding structure includes: a first basis element, a second basis element, a first generating element and a second generating element; the first generating element is the opposite number of the conjugate operation result of the first basis element, and the second generating element is the conjugate operation result of the second basis element; the first basis element, the second basis element, the first generating element and the second generating element are complex numbers or block matrices.

[0052] The embodiment of the present application can construct 2 based on the above target coding structure. k (k=1, 2, 3, ...) antenna transmits diversity codeword, and the transmit diversity order is 2 k Obviously, there is more than one encoding codeword that satisfies the above target encoding structure. The target encoding codeword in the embodiment of the present application is at least one of the multiple encoding codewords that satisfy the above target encoding structure.

[0053] Compared with the related art, in the embodiment of the present application, when the terminal obtains and uses the target coding codeword that meets the target coding structure for multi-antenna transmit diversity transmission, the target coding codeword designed based on the target coding structure can not only ensure the diversity gain, but also reduce the types of reflection coefficients required on each antenna, that is, it can reduce the types of load impedances required on each antenna, thereby reducing the complexity of system implementation and effectively reducing the probability of detection errors.

[0054] The following describes the diversity transmission method provided by the embodiments of the present application in detail through some embodiments and their application scenarios in conjunction with the accompanying drawings. It is understandable that different embodiments can be combined with each other, and the same or similar concepts or steps will not be repeated.

[0055] Figure 2 This is one of the flow charts of the diversity transmission method provided in the embodiment of the present application, such as Figure 2 As shown, the method includes steps 201-202; wherein:

[0056] Step 201: The terminal determines a target encoding codeword.

[0057] Step 202: The terminal performs diversity transmission based on the target coding codeword;

[0058] Wherein, the target coding codeword satisfies the target coding structure; the target coding codeword is a coding matrix with a dimension of N×N; N=2 k , k is a positive integer; the target coding structure includes: a first basis element, a second basis element, a first generating element and a second generating element; the first generating element is the opposite number of the conjugate operation result of the first basis element, and the second generating element is the conjugate operation result of the second basis element; the first basis element, the second basis element, the first generating element and the second generating element are complex numbers or block matrices.

[0059] It should be noted that the embodiments of the present application can be applied to scenarios where multi-antenna transmit diversity is used in backscatter communication. The terminal includes a backscatter communication device (BSC UE). It is understood that the BSC UE may include, but is not limited to, tags in radio frequency identification (RFID) systems, passive IoT, semi-passive IoT, and other devices.

[0060] Optionally, the target coding codeword may also be referred to as a codeword matrix, a group coding matrix, a space-time group coding matrix, a group coding codeword or a space-time group coding codeword.

[0061] In the diversity transmission method provided in the embodiment of the present application, the terminal determines and uses a target coding codeword that satisfies the target coding structure for multi-antenna transmit diversity transmission, and the target coding codeword is a coding matrix with a dimension of N×N; the target coding structure includes: a first basic element, a second basic element, a first generating element, and a second generating element; the first generating element is the opposite number of the conjugate operation result of the first basic element, and the second generating element is the conjugate operation result of the second basic element; the first basic element, the second basic element, the first generating element, and the second generating element are complex numbers or block matrices; compared with the related art, the target coding codeword designed based on the target coding structure in the embodiment of the present application can not only ensure diversity gain, but also reduce the types of reflection coefficients required on each antenna, that is, it can reduce the types of load impedances required on each antenna, thereby reducing the complexity of system implementation and effectively reducing the probability of detection error.

[0062] Optionally, the target encoding codeword provided in the embodiment of the present application has the characteristic that, for a target encoding codeword of dimension N×N, the target encoding codeword satisfies a target encoding structure, which can be represented as S;

[0063]

[0064] The elements in S include S 12 、S 34 、 and The S is a coding matrix with dimension N×N; N=2 k , k is a positive integer; S 12 is the first basic element, S 34 is the second basic element, For the second generated element, is the first generating element; the S 12 、S 34 、 and Meet at least one of the following:

[0065] When N is equal to 2, the S 12 、S 34 、 and All are plural, For S 34 The complex conjugate of For S 12 The opposite of the conjugate complex number of ;

[0066] When N is greater than 2, the S 12 、S 34 、 and are all block matrices of dimension L×L, where L=N / 2, and elements in each of the block matrices are complex numbers; For S 34 The conjugate matrix of For S 12 Obviously, the target coding structure constructed in the embodiment of the present application can be expanded to 2 k (k=1, 2, 3, ...) antennas transmit diversity codewords.

[0067] The structural structure of the target coding structure determines the target coding codeword designed based on the target coding structure, which can not only ensure diversity gain, but also reduce the types of reflection coefficients required on each antenna, that is, it can reduce the types of load impedances required on each antenna, thereby reducing the complexity of system implementation and effectively reducing the probability of detection errors.

[0068] The embodiment of the present application designs a target coding codeword (i.e., a transmit diversity codebook) based on a target coding structure, so that when the target coding codeword that meets the target coding structure is applied to a 2-antenna transmit diversity transmission scenario, full diversity gain and full rate can be obtained. At this time, the target coding codeword belongs to the OSTBC codebook; and when the target coding codeword that meets the target coding structure is applied to a transmit diversity transmission scenario with more than 2 transmitting antennas, a diversity gain slightly worse than the full diversity gain and full rate transmission can be obtained. At this time, the target coding codeword belongs to the QSTBC codebook.

[0069] The target coding codewords provided in the embodiments of the present application are applied to the 2-antenna transmit diversity transmission scenario, the 4-antenna transmit diversity transmission scenario and the 2 k Antenna transmit diversity transmission is explained separately.

[0070] 1. 2-antenna transmit diversity transmission

[0071] In the 2-antenna transmit diversity transmission scenario, the dimension of the target coding codeword is 2×2, that is, N is equal to 2, S 12 =s1,S 34 =s2, The target encoding codeword is S2;

[0072]

[0073] Wherein, the elements in S2 are all complex numbers; is the complex conjugate of s2, is the opposite of the complex conjugate of s1.

[0074] According to the target codeword S2, assuming that in the current symbol period, the symbol sent on antenna 1 is recorded as s1, and the symbol sent on antenna 2 is recorded as However, in the next symbol period, the symbol sent on antenna 1 is s2, and the symbol sent on antenna 2 is Based on the above analysis and the definition of OSTBC codewords, it can be seen that S2 belongs to the OSTBC codeword. Therefore, transmit diversity transmission based on S2 can achieve full diversity gain and full rate transmission.

[0075] The following analyzes the differences between the target encoding codeword S2 provided in the embodiment of the present application and the standard Alamouti code and the extended Alamouti code in backscatter communication in the related art:

[0076] Assuming that the terminal transmits based on BPSK modulation symbols, according to the mapping principle of backscatter communication, the mapping rule between symbols 0 and 1 and reflection coefficients is: That is, the symbols 0 and 1 are represented by controlling two phase-inverted load impedances.

[0077] Table 1 shows a coding table for the diversity coding codeword S2 provided in an embodiment of the present application, in which different symbols are sent simultaneously on two antennas.

[0078] Table 1 Two-antenna transmit diversity coding table for diversity coding codewords provided in the embodiment of the present application

[0079]

[0080]

[0081] For comparison, Table 2 and Table 3 show the coding tables of the standard Alamouti codeword and the extended Alamouti codeword in the related art for simultaneously transmitting different symbols on two antennas. The extended Alamouti codeword is

[0082] Table 2 Two-antenna transmit diversity coding table for standard Alamouti codewords in related art

[0083] 00 Antenna 1 Antenna 2 01 Antenna 1 Antenna 2 t <![CDATA[|Γ|e jθ ]]> <![CDATA[|Γ|e jθ ]]> t <![CDATA[|Γ|e jθ ]]> <![CDATA[|Γ|e j(θ+π) ]]> t+T <![CDATA[|Γ|e -j(θ+π) ]]> <![CDATA[|Γ|e -jθ ]]> t+T <![CDATA[|Γ|e -jθ ]]> <![CDATA[|Γ|e -jθ ]]> 10 Antenna 1 Antenna 2 11 Antenna 1 Antenna 2 t <![CDATA[|Γ|e j(θ+π) ]]> <![CDATA[|Γ|e jθ ]]> t <![CDATA[|Γ|e j(θ+π) ]]> <![CDATA[|Γ|e j(θ+π) ]]> t+T <![CDATA[|Γ|e -j(θ+π) ]]> <![CDATA[|Γ|e -j(θ+π) ]]> t+T <![CDATA[|Γ|e -jθ ]]> <![CDATA[|Γ|e -j(θ+π) ]]>

[0084] Table 3 Two-antenna transmit diversity coding table for extended Alamouti codewords in related art

[0085] 00 Antenna 1 Antenna 2 01 Antenna 1 Antenna 2 t <![CDATA[|Γ|e jθ ]]> <![CDATA[|Γ|e jθ ]]> t <![CDATA[|Γ|e jθ ]]> <![CDATA[|Γ|e j(θ+π) ]]> t+T <![CDATA[|Γ|e -jθ ]]> <![CDATA[|Γ|e -j(θ+π) ]]> t+T <![CDATA[|Γ|e -j(θ+π) ]]> <![CDATA[|Γ|e -j(θ+π) ]]> 10 Antenna 1 Antenna 2 11 Antenna 1 Antenna 2 t <![CDATA[|Γ|e j(θ+π) ]]> <![CDATA[|Γ|e jθ ]]> t <![CDATA[|Γ|e j(θ+π) ]]> <![CDATA[|Γ|e j(θ+π) ]]> t+T <![CDATA[|Γ|e -jθ ]]> <![CDATA[|Γ|e -jθ ]]> t+T <![CDATA[|Γ|e -j(θ+π) ]]> <![CDATA[|Γ|e -jθ ]]>

[0086] According to Table 1, based on the diversity coding codewords provided in the embodiment of the present application, antenna 1 only needs two coefficients |Γ|e jθ and |Γ|ej(θ+π) Antenna 2 also only needs two coefficients |Γ|e -jθ and |Γ|e -j(θ+π) That is to say, based on the diversity coding codewords provided in the embodiments of the present application, only two load impedances are required on each antenna.

[0087] According to Table 2 and Table 3, based on the standard Alamouti codeword and the extended Alamouti codeword in the related art, antenna 1 and antenna 2 each require four coefficients |Γ|e jθ ,|Γ|e -j(θ+π) ,|Γ|e j(θ+π) ,|Γ|e -j(θ+π) That is to say, in the related art, four types of load impedances are required on each antenna.

[0088] Obviously, compared with the related art, the target coding codeword designed based on the target coding structure in the embodiment of the present application can not only ensure diversity gain, but also reduce the types of reflection coefficients required on each antenna, that is, it can reduce the types of load impedances required on each antenna, thereby reducing the complexity of system implementation and effectively reducing the probability of detection errors.

[0089] 2. 4-antenna transmit diversity transmission

[0090] In a 4-antenna transmit diversity transmission scenario, the dimension of the target coding codeword is 4×4, that is, N is equal to 4.

[0091] In the case of , the target encoding codeword is S4;

[0092]

[0093] Wherein, the elements in S4 are all complex numbers; is the complex conjugate of s2, is the complex conjugate of s3, is the complex conjugate of s4, is the opposite of the complex conjugate of s1, is the opposite of the complex conjugate of s2, is the opposite of the conjugate complex number of s3, -s2 is the opposite of s2, and -s3 is the opposite of s3.

[0094] According to the target codeword S4, assuming that in the current symbol period (recorded as the first symbol period), the symbol sent on antenna 1 is recorded as s1, and the symbol sent on antenna 2 is recorded as The symbol sent on antenna 3 is denoted as The symbol sent on antenna 4 is denoted as s4;

[0095] In the next symbol period after the first symbol period (denoted as the second symbol period), the symbol sent on antenna 1 is s2, and the symbol sent on antenna 2 is The symbol sent on antenna 3 is The symbol sent on antenna 4 is -s3;

[0096] In the next symbol period after the second symbol period (recorded as the third symbol period), the symbol sent on antenna 1 is s3, and the symbol sent on antenna 2 is The symbol sent on antenna 3 is The symbol sent on antenna 4 is -s2;

[0097] In the next symbol period after the third symbol period (denoted as the fourth symbol period), the symbol sent on antenna 1 is s4, and the symbol sent on antenna 2 is The symbol sent on antenna 3 is The symbol sent on antenna 4 is s1.

[0098] Based on the above analysis, according to the definition of QSTBC codewords, S4 belongs to the QSTBC codeword. Therefore, transmit diversity transmission based on S4 can obtain a diversity gain slightly lower than the full diversity gain and full rate transmission.

[0099] The target encoding codeword S4 provided by the embodiment of the present application is analyzed below, and the ABBA type QSTBC in the related art (for example, the codebook is )Difference in backscatter communication:

[0100] Assuming that the terminal transmits based on BPSK modulation symbols, according to the mapping principle of backscatter communication, the mapping rule between symbols 0 and 1 and reflection coefficients is: That is, the symbols 0 and 1 are represented by controlling two phase-inverted load impedances.

[0101] Table 4 shows a coding table for the diversity coding codeword S4 provided in an embodiment of the present application to simultaneously transmit different symbols on four antennas. In comparison, Table 5 shows a coding table for the ABBA-type QSTBC in the related art to simultaneously transmit different symbols on four antennas.

[0102] Table 4 4-antenna transmit diversity coding table for diversity coding codewords provided in the embodiment of the present application

[0103]

[0104] Table 5 4-antenna transmit diversity coding table of ABBA-type QSTBC in related art

[0105]

[0106] According to Table 4, based on the diversity coding codewords provided in the embodiment of the present application, antenna 1 only needs two coefficients |Γ|e jθ and |Γ|e j(θ+π) , antenna 2 also only needs two coefficients |Γ|e -jθ and |Γ|e -j(θ+π) , antenna 3 also only needs two coefficients |Γ|e -jθ and |Γ|e -j(θ+π) , antenna 4 also only needs two coefficients |Γ|e jθ and |Γ|e j(θ+π) That is to say, based on the diversity coding codewords provided in the embodiments of the present application, only two load impedances are required on each antenna.

[0107] According to Table 5, based on the ABBA-type QSTBC in the related art, antenna 1, antenna 2, antenna 3 and antenna 4 each require four coefficients |Γ|e jθ ,|Γ|e -j(θ+π) ,|Γ|e j(θ+π) ,|Γ|e -j(θ+π) That is to say, in the related art, four types of load impedances are required on each antenna.

[0108] Obviously, compared with the related art, the target coding codeword designed based on the target coding structure in the embodiment of the present application can not only ensure diversity gain, but also reduce the types of reflection coefficients required on each antenna, that is, it can reduce the types of load impedances required on each antenna, thereby reducing the complexity of system implementation and effectively reducing the probability of detection errors.

[0109] III.2 k Antenna transmit diversity transmission

[0110] In 2 k In the antenna transmit diversity transmission scenario, the dimension of the target coding codeword is N×N. The target coding codeword designed based on the target coding structure in the embodiment of the present application can be expanded to 2 k (k=1, 2, 3, ...) antennas transmit diversity codewords. The design principle is similar to that of S, S2, and S4, and will not be repeated here.

[0111] The following describes the implementation of the target coding codeword-based transmit diversity transmission scheme provided in the embodiment of the present application.

[0112] In the embodiment of the present application, the implementation method of the terminal determining the target encoding codeword in the above step 201 may include any of the following methods:

[0113] Determination method 1: The network side device determines the target encoding codeword and sends the target encoding codeword indication information to the terminal;

[0114] Determination method 2: The terminal independently determines the target encoding codeword.

[0115] The present application also provides an implementation method for triggering terminal diversity transmission, which may include any of the following methods:

[0116] Trigger mode 1: Terminal triggers terminal diversity transmission;

[0117] Trigger mode 2: The network side device triggers the terminal diversity transmission.

[0118] On this basis, the diversity transmission method provided in the embodiments of the present application may include at least the following scenarios:

[0119] Scenario 1: The network triggers terminal diversity transmission and determines and indicates codebook information;

[0120] Scenario 2: The terminal triggers terminal diversity transmission; the network determines and indicates codebook information;

[0121] Scenario 3: The network triggers terminal diversity transmission; the terminal determines and indicates codebook information;

[0122] Scenario 4: The terminal triggers terminal diversity transmission; the terminal determines and indicates codebook information.

[0123] Before explaining scenarios 1 to 4, the following describes determination method 1, determination method 2, triggering method 1, and triggering method 2:

[0124] Regarding determination method 1: The network-side device determines a target encoding codeword and sends first indication information to the terminal; wherein the first indication information is used to indicate the target encoding codeword. The terminal receives the first indication information sent by the network-side device; the terminal determines the target encoding codeword based on the first indication information. For example, the terminal parses the first indication information to obtain codeword structure parameters, and uses the codeword structure parameters to generate the target encoding codeword.

[0125] In practice, the first indication information includes at least one of the following:

[0126] 1) Transmit diversity order and codeword matrix indicator; for example, a codeword identification indicator, including: a codeword index or a codeword number.

[0127] 2) Codebook dimension indication information and codeword matrix indicator: For example, the codebook dimension indication information is used to indicate the codebook dimension of the target encoding codeword, and the codebook dimension is, for example, the transmit diversity order.

[0128] In practice, the first indication information may be carried in one of the following ways:

[0129] 1) The first indication message is carried by downlink control information (DCI). It is understandable that the DCI may be a newly designed DCI format or may reuse existing DCI.

[0130] 2) The first indication information is carried by a preamble sequence;

[0131] 3) The first indication information is carried by a signal sequence; wherein the signal sequence includes: a signal sequence scrambled by a BSC UE ID or a random number related to the BSC UE, or a signal sequence carrying the BSC UE ID;

[0132] 4) The first indication information is carried by a Medium Access Control (MAC) control element (CE).

[0133] For trigger mode 1: when the first target condition is met, the terminal actively sends first trigger information to the network side device; wherein, the first trigger information is used to instruct the network side device to trigger diversity transmission of the terminal.

[0134] In practice, the first trigger information may be carried in one of the following ways:

[0135] The first trigger information is carried by a preamble sequence;

[0136] The first trigger information is carried by a signal sequence; wherein the signal sequence includes: a signal sequence scrambled by a BSC UE ID or a random number related to the BSC UE, or a signal sequence carrying the BSC UE ID;

[0137] The first trigger information is carried by MAC CE.

[0138] The first target condition includes at least one of the following:

[0139] 1) The energy of the reverse transmission signal of the terminal is lower than a first threshold;

[0140] 2) The terminal is located at the edge of a cell;

[0141] 3) The number of times the terminal sends a negative acknowledgement (NACK) exceeds a second threshold;

[0142] 4) The energy of the downlink received signal is lower than the third threshold.

[0143] For determination method 2: the terminal independently determines the target encoding codeword.

[0144] Specifically, the terminal determines the target encoding codeword based on the terminal's capability information and / or channel state information. Then, the terminal sends second indication information to the network side device; wherein the second indication information is used to indicate the target encoding codeword.

[0145] In practice, the second indication information includes at least one of the following:

[0146] Transmit diversity order and codeword matrix indicator;

[0147] Codebook dimension indication information and codeword matrix indicator.

[0148] In practice, the second indication information may be carried in one of the following ways:

[0149] The second indication information is carried by the MAC CE;

[0150] The second indication information is carried by a preamble;

[0151] The second indication information is carried by a sequence.

[0152] Optionally, the terminal determines the target encoding codeword only when a first target condition is satisfied. The first target condition includes at least one of the following:

[0153] 1) The energy of the reverse transmission signal of the terminal is lower than a first threshold;

[0154] 2) The terminal is located at the edge of a cell;

[0155] 3) The number of times the terminal sends a negative acknowledgement (NACK) exceeds a second threshold;

[0156] 4) The energy of the downlink received signal is lower than the third threshold.

[0157] In practice, the second indication information includes at least one of the following:

[0158] 1) Transmit diversity order and codeword matrix indicator;

[0159] 2) Codebook dimension indication information and codeword matrix indicator.

[0160] In practice, the second indication information may be carried in one of the following ways:

[0161] 1) The second indication information is carried by the MAC CE;

[0162] 2) The second indication information is carried by a preamble;

[0163] 3) The second indication information is carried by a sequence. It can be understood that the sequence here can be a Sounding Reference Signal (SRS) signal.

[0164] For trigger mode 2: the terminal receives second trigger information sent by the network side device; wherein the second trigger information is used to trigger terminal diversity transmission.

[0165] Optionally, a carrying manner of the second trigger information includes one of the following:

[0166] The second trigger message is carried by DCI;

[0167] The second trigger information is carried by a preamble sequence;

[0168] The second trigger information is carried by a signal sequence; wherein the signal sequence includes: a signal sequence scrambled by a BSC UE ID or a random number related to the BSC UE, or a signal sequence carrying the BSC UE ID;

[0169] The second trigger information is carried by MAC CE.

[0170] In this embodiment of the present application, the network-side device sends third indication information to the terminal; wherein the third indication information is used to instruct the terminal to send a measurement reference signal on M transmit antennas. The terminal receives the third indication information sent by the network-side device; wherein the third indication information is used to instruct the terminal to send a measurement reference signal on M transmit antennas;

[0171] The terminal sends a measurement reference signal on M transmit antennas based on the third indication information.

[0172] Specifically, the terminal sending, based on the third indication information, a measurement reference signal on M transmit antennas, includes:

[0173] The terminal sends measurement reference signals on the M transmit antennas respectively at different times based on the third indication information; or

[0174] Based on the third indication information, the terminal sends measurement reference signals on the M transmit antennas respectively at the same time, and the measurement reference signals sent on different transmit antennas are all scrambled with random numbers related to index information of corresponding antennas.

[0175] In practice, the third indication information includes at least one of the following:

[0176] Information used to indicate a time or a duty cycle of a measurement reference signal sent by the terminal on each of the M transmitting antennas;

[0177] Information used to indicate a sequence of a measurement reference signal sent by the terminal on each of the M transmitting antennas;

[0178] Information used to indicate the frequency, bandwidth, or frequency shift of a measurement reference signal sent by the terminal on each of the M transmitting antennas.

[0179] In practice, the carrying mode of the third indication information includes one of the following:

[0180] The third indication information is carried by DCI;

[0181] The third indication information is carried by the preamble sequence;

[0182] The third indication information is carried by a signal sequence; wherein the signal sequence includes: a signal sequence scrambled by the BSC UE ID or a random number related to the BSC UE ID, or a signal sequence carrying the BSC UE ID;

[0183] The third indication information is carried by the MAC CE.

[0184] Figure 3 This is a second flow chart of the diversity transmission method provided in the embodiment of the present application, such as Figure 3 As shown, the method includes steps 301-302; wherein:

[0185] Step 301: The network side device determines the target encoding codeword;

[0186] Step 302: The network side device sends first indication information to the terminal; wherein the first indication information is used to indicate the target encoding codeword;

[0187] Wherein, the target coding codeword satisfies the target coding structure; the target coding codeword is a coding matrix with a dimension of N×N; N=2 k , k is a positive integer; the target coding structure includes: a first basis element, a second basis element, a first generating element and a second generating element; the first generating element is the opposite number of the conjugate operation result of the first basis element, and the second generating element is the conjugate operation result of the second basis element; the first basis element, the second basis element, the first generating element and the second generating element are complex numbers or block matrices.

[0188] It should be noted that the embodiments of the present application can be applied to scenarios where multi-antenna transmit diversity is used in backscatter communications. The terminal includes a base station subscriber unit (BSC) UE. It is understood that a BSC UE may include, but is not limited to, tags in RFID systems, passive IoT, semi-passive IoT, and other devices.

[0189] In the diversity transmission method provided in the embodiment of the present application, the network side device determines a target coding codeword that satisfies the target coding structure and sends the target coding codeword to the terminal, instructing the terminal to use the target coding codeword for multi-antenna transmit diversity transmission, where the target coding codeword is a coding matrix with a dimension of N×N; the target coding structure includes: a first basic element, a second basic element, a first generating element, and a second generating element; the first generating element is the opposite of the conjugate operation result of the first basic element, and the second generating element is the conjugate operation result of the second basic element; the first basic element, the second basic element, the first generating element, and the second generating element are complex numbers or block matrices; compared with the related art, the target coding codeword designed based on the target coding structure in the embodiment of the present application can not only ensure diversity gain, but also reduce the types of reflection coefficients required on each antenna, that is, it can reduce the types of load impedances required on each antenna, thereby reducing the complexity of system implementation and effectively reducing the probability of detection error.

[0190] Optionally, the first indication information includes at least one of the following:

[0191] Transmit diversity order and codeword matrix indicator;

[0192] Codebook dimension indication information and codeword matrix indicator.

[0193] In practice, the first indication information may be carried in one of the following ways:

[0194] The first indication message is carried by DCI;

[0195] The first indication information is carried by a preamble sequence;

[0196] The first indication information is carried by a signal sequence; wherein the signal sequence includes: a signal sequence scrambled by the BSC UE ID or a random number related to the BSC UE ID, or a signal sequence carrying the BSC UE ID;

[0197] The first indication information is carried by a medium access control MAC control element CE.

[0198] Optionally, the second target condition includes at least one of the following:

[0199] The energy of the reverse transmission signal of the terminal is lower than a first threshold;

[0200] The terminal is located at the edge of a cell;

[0201] The number of times the terminal sends NACK exceeds a second threshold;

[0202] The network-side device receives first trigger information sent by the terminal; wherein the first trigger information is used to indicate to the network-side device that the terminal has triggered diversity transmission.

[0203] In an embodiment of the present application, the implementation method of the network side device determining the target encoding codeword when the second target condition is met may include: the network side device determines the target encoding codeword based on the capability information and / or channel state information of the terminal when the second target condition is met.

[0204] Optionally, when the second target condition is met, the network side device sends third indication information to the terminal; wherein the third indication information is used to instruct the terminal to send a measurement reference signal on M transmitting antennas.

[0205] Optionally, the third indication information includes at least one of the following:

[0206] 1) information used to indicate a time or period of a measurement reference signal sent by the terminal on each of the M transmitting antennas;

[0207] 2) information for indicating a sequence of a measurement reference signal sent by the terminal on each of the M transmit antennas;

[0208] 3) Information used to indicate the frequency, bandwidth, or frequency shift of a measurement reference signal sent by the terminal on each of the M transmitting antennas.

[0209] The following four specific examples are used to illustrate the above four scenarios:

[0210] Scenario 1: The network triggers terminal diversity transmission, and the network determines and indicates the codebook.

[0211] Figure 4 This is one of the signaling interaction diagrams of the diversity transmission method provided in the embodiment of the present application, such as Figure 4 As shown, the method is implemented by the terminal and the network side device in cooperation, and the method includes steps 401-410; wherein:

[0212] Step 401: The terminal reports terminal capability information to the network side device.

[0213] Optionally, the terminal includes a BSC UE; the terminal capability information includes at least one of the following: a modulation mode supported by the BSC UE and an antenna capability of the BSC UE.

[0214] Step 402: The network-side device determines the modulation mode, channel coding and decoding mode, and data transmission scheduling mode according to the terminal capability information.

[0215] Step 403: When the second target condition is met, the network-side device decides to trigger the terminal to perform transmit diversity transmission.

[0216] Optionally, the second target condition includes at least one of the following: the energy of the reverse transmission signal of the terminal is lower than a first threshold; the terminal is located at the edge of a cell; the number of times the terminal sends a negative acknowledgement NACK exceeds a second threshold.

[0217] Step 404: The network-side device sends second trigger information to the terminal; wherein the second trigger information is used to trigger terminal diversity transmission.

[0218] Step 405: The network-side device sends third indication information to the terminal; wherein the third indication information is used to instruct the terminal to send a measurement reference signal on M transmitting antennas.

[0219] Optionally, the third indication information includes at least one of the following: information for indicating the time or duty cycle of the measurement reference signal sent by the terminal on each of the M transmitting antennas; information for indicating the sequence of the measurement reference signal sent by the terminal on each of the M transmitting antennas; information for indicating the frequency, bandwidth or frequency shift of the measurement reference signal sent by the terminal on each of the M transmitting antennas.

[0220] Optionally, the carrying method of the third indication information includes one of the following: the third indication information is carried through DCI; the third indication information is carried through a preamble sequence; the third indication information is carried through a signal sequence; wherein the signal sequence includes: a signal sequence encrypted with the BSC UE ID or encrypted with a random number related to the BSC UE ID, or a signal sequence carrying the BSCUE ID; the third indication information is carried through the MAC CE.

[0221] Step 406: After the terminal receives the third indication information sent by the network-side device, the terminal sends a measurement reference signal on M transmit antennas based on the third indication information.

[0222] Optionally, the implementation method of the terminal sending the measurement reference signal on M transmitting antennas based on the third indication information may include: the terminal sending the measurement reference signal on the M transmitting antennas at different times based on the third indication information; the terminal sending the measurement reference signal on the M transmitting antennas at the same time based on the third indication information, and the measurement reference signals sent on different transmitting antennas are all scrambled with random numbers related to the index information of the corresponding antenna.

[0223] Step 407: The network side device determines the target encoding codeword based on the capability information and / or channel state information of the terminal;

[0224] Wherein, the target coding codeword satisfies the target coding structure; the target coding codeword is a coding matrix with a dimension of N×N; N=2 k , k is a positive integer; the target coding structure includes: a first basis element, a second basis element, a first generating element and a second generating element; the first generating element is the opposite number of the conjugate operation result of the first basis element, and the second generating element is the conjugate operation result of the second basis element; the first basis element, the second basis element, the first generating element and the second generating element are complex numbers or block matrices.

[0225] Step 408: The network-side device sends first indication information to the terminal; wherein the first indication information is used to indicate the target encoding codeword.

[0226] It should be noted that the second trigger information and the first indication information can be carried uniformly, that is, carried in one signaling at the same time; or they can be carried independently, that is, carried through different signaling.

[0227] Alternatively, the second trigger information and the third indication information may be carried uniformly, that is, carried in one signaling at the same time; or they may be carried independently, that is, carried through different signalings.

[0228] Optionally, the first indication information includes at least one of the following: a transmit diversity order and a codeword matrix indicator; codebook dimension indication information and a codeword matrix indicator.

[0229] It should be noted that the embodiment of the present application does not limit the execution order between step 404, step 405 and step 408. Any one of step 404, step 405 and step 408 can be executed first, or the steps can be executed simultaneously.

[0230] Step 409: The terminal determines the target encoding codeword based on the first indication information.

[0231] Step 410: The terminal performs diversity transmission based on the target coding codeword.

[0232] Optionally, the first indication information is carried in one of the following ways: the first indication message is carried via DCI; the first indication information is carried via a preamble sequence; the first indication information is carried via a signal sequence; wherein the signal sequence includes: a signal sequence scrambled by a BSC UE ID or a random number related to the BSC UE, or a signal sequence carrying the BSC UE ID; 4) the first indication information is carried via a MAC CE. It is understandable that the DCI can be a newly designed DCI format, or it can reuse an existing DCI.

[0233] In the diversity transmission method provided in the embodiment of the present application, the network side device determines a target coding codeword that satisfies the target coding structure and sends the target coding codeword to the terminal, instructing the terminal to use the target coding codeword for multi-antenna transmit diversity transmission, where the target coding codeword is a coding matrix with a dimension of N×N; the target coding structure includes: a first basic element, a second basic element, a first generating element, and a second generating element; the first generating element is the opposite of the conjugate operation result of the first basic element, and the second generating element is the conjugate operation result of the second basic element; the first basic element, the second basic element, the first generating element, and the second generating element are complex numbers or block matrices; compared with the related art, the target coding codeword designed based on the target coding structure in the embodiment of the present application can not only ensure diversity gain, but also reduce the types of reflection coefficients required on each antenna, that is, it can reduce the types of load impedances required on each antenna, thereby reducing the complexity of system implementation and effectively reducing the probability of detection error.

[0234] Scenario 2: The terminal triggers terminal diversity transmission; the network determines and indicates the codebook.

[0235] Figure 5 This is the second signaling interaction diagram of the diversity transmission method provided in the embodiment of the present application, such as Figure 5 As shown, the method is implemented by the terminal and the network side device in cooperation, and the method includes steps 501-510; wherein:

[0236] Step 501: The terminal reports terminal capability information to the network side device.

[0237] Optionally, the terminal includes a BSC UE; the terminal capability information includes at least one of the following: a modulation mode supported by the BSC UE and an antenna capability of the BSC UE.

[0238] Step 502: The network side device determines the modulation mode, channel coding and decoding mode, and data transmission scheduling mode according to the terminal capability information.

[0239] Step 503: When the first target condition is met, the terminal decides to trigger transmit diversity transmission.

[0240] Step 504: The terminal sends first trigger information to the network side device; wherein the first trigger information is used to instruct the network side device to trigger diversity transmission of the terminal.

[0241] Step 505: The network-side device sends third indication information to the terminal; wherein the third indication information is used to instruct the terminal to send a measurement reference signal on M transmitting antennas.

[0242] Optionally, the third indication information includes at least one of the following: information for indicating the time or duty cycle of the measurement reference signal sent by the terminal on each of the M transmitting antennas; information for indicating the sequence of the measurement reference signal sent by the terminal on each of the M transmitting antennas; information for indicating the frequency, bandwidth or frequency shift of the measurement reference signal sent by the terminal on each of the M transmitting antennas.

[0243] Optionally, the carrying method of the third indication information includes one of the following: the third indication information is carried through DCI; the third indication information is carried through a preamble sequence; the third indication information is carried through a signal sequence; wherein the signal sequence includes: a signal sequence encrypted with the BSC UE ID or encrypted with a random number related to the BSC UE ID, or a signal sequence carrying the BSCUE ID; the third indication information is carried through the MAC CE.

[0244] Step 506: After the terminal receives the third indication information sent by the network-side device, the terminal sends a measurement reference signal on M transmit antennas based on the third indication information.

[0245] Optionally, the implementation method of the terminal sending the measurement reference signal on M transmitting antennas based on the third indication information may include: the terminal sending the measurement reference signal on the M transmitting antennas at different times based on the third indication information; the terminal sending the measurement reference signal on the M transmitting antennas at the same time based on the third indication information, and the measurement reference signals sent on different transmitting antennas are all scrambled with random numbers related to the index information of the corresponding antenna.

[0246] Step 507: The network side device determines the target encoding codeword based on the capability information and / or channel state information of the terminal;

[0247] Wherein, the target coding codeword satisfies the target coding structure; the target coding codeword is a coding matrix with a dimension of N×N; N=2 k, k is a positive integer; the target coding structure includes: a first basis element, a second basis element, a first generating element and a second generating element; the first generating element is the opposite number of the conjugate operation result of the first basis element, and the second generating element is the conjugate operation result of the second basis element; the first basis element, the second basis element, the first generating element and the second generating element are complex numbers or block matrices.

[0248] Step 508: The network-side device sends first indication information to the terminal; wherein the first indication information is used to indicate the target encoding codeword.

[0249] Optionally, the first indication information includes at least one of the following: a transmit diversity order and a codeword matrix indicator; codebook dimension indication information and a codeword matrix indicator.

[0250] It should be noted that the embodiment of the present application does not limit the execution order between step 505 and step 508. Any one of step 505 and step 508 can be executed first, or the steps can be executed simultaneously.

[0251] Step 509: The terminal determines the target encoding codeword based on the first indication information.

[0252] Step 510: The terminal performs diversity transmission based on the target coding codeword.

[0253] Optionally, a manner of carrying the first indication information includes one of the following: the first indication message is carried by DCI; the first indication information is carried by a preamble sequence; the first indication information is carried by a signal sequence; wherein the signal sequence includes: a signal sequence scrambled by a BSC UE ID or a random number related to the BSC UE, or a signal sequence carrying the BSC UE ID; the first indication information is carried by a MAC CE. It is understandable that the DCI can be a newly designed DCI format, or reuse an existing DCI.

[0254] In the diversity transmission method provided in the embodiment of the present application, the network side device determines a target coding codeword that satisfies the target coding structure and sends the target coding codeword to the terminal, instructing the terminal to use the target coding codeword for multi-antenna transmit diversity transmission, where the target coding codeword is a coding matrix with a dimension of N×N; the target coding structure includes: a first basic element, a second basic element, a first generating element, and a second generating element; the first generating element is the opposite of the conjugate operation result of the first basic element, and the second generating element is the conjugate operation result of the second basic element; the first basic element, the second basic element, the first generating element, and the second generating element are complex numbers or block matrices; compared with the related art, the target coding codeword designed based on the target coding structure in the embodiment of the present application can not only ensure diversity gain, but also reduce the types of reflection coefficients required on each antenna, that is, it can reduce the types of load impedances required on each antenna, thereby reducing the complexity of system implementation and effectively reducing the probability of detection error.

[0255] Scenario 3: The network triggers terminal diversity transmission; the terminal determines and indicates the codebook.

[0256] Figure 6 This is the third signaling interaction diagram of the diversity transmission method provided in the embodiment of the present application, such as Figure 6 As shown, the method includes steps 601-609; wherein:

[0257] Step 601: The terminal reports terminal capability information to the network side device.

[0258] Optionally, the terminal includes a BSC UE; the terminal capability information includes at least one of the following: a modulation mode supported by the BSC UE and an antenna capability of the BSC UE.

[0259] Step 602: The network side device determines the modulation mode, channel coding and decoding mode, and data transmission scheduling mode according to the terminal capability information.

[0260] Step 603: When the second target condition is met, the network-side device decides to trigger the terminal to perform transmit diversity transmission.

[0261] Optionally, the second target condition includes at least one of the following: the energy of the reverse transmission signal of the terminal is lower than a first threshold; the location of the terminal is at the edge of a cell; the number of times the terminal sends a negative acknowledgement NACK exceeds a second threshold.

[0262] Step 604: The network-side device sends second trigger information to the terminal; wherein the second trigger information is used to trigger terminal diversity transmission.

[0263] Step 605: The network-side device sends third indication information to the terminal; wherein the third indication information is used to instruct the terminal to send a measurement reference signal on M transmitting antennas.

[0264] It should be noted that the second trigger information and the third indication information can be carried in a unified manner, that is, carried in one signaling at the same time, or can be carried independently.

[0265] Optionally, the third indication information includes at least one of the following: information for indicating the time or duty cycle of the measurement reference signal sent by the terminal on each of the M transmitting antennas; information for indicating the sequence of the measurement reference signal sent by the terminal on each of the M transmitting antennas; information for indicating the frequency, bandwidth or frequency shift of the measurement reference signal sent by the terminal on each of the M transmitting antennas.

[0266] Optionally, the carrying method of the third indication information includes one of the following: the third indication information is carried through DCI; the third indication information is carried through a preamble sequence; the third indication information is carried through a signal sequence; wherein the signal sequence includes: a signal sequence encrypted with the BSC UE ID or encrypted with a random number related to the BSC UE ID, or a signal sequence carrying the BSCUE ID; the third indication information is carried through the MAC CE.

[0267] Step 606: After the terminal receives the third indication information sent by the network-side device, the terminal sends a measurement reference signal on M transmit antennas based on the third indication information.

[0268] Optionally, the implementation method of the terminal sending the measurement reference signal on M transmitting antennas based on the third indication information may include: the terminal sending the measurement reference signal on the M transmitting antennas at different times based on the third indication information; the terminal sending the measurement reference signal on the M transmitting antennas at the same time based on the third indication information, and the measurement reference signals sent on different transmitting antennas are all scrambled with random numbers related to the index information of the corresponding antenna.

[0269] Step 607: The terminal determines the target encoding codeword based on the terminal's capability information and / or channel state information;

[0270] Wherein, the target coding codeword satisfies the target coding structure; the target coding codeword is a coding matrix with a dimension of N×N; N=2 k, k is a positive integer; the target coding structure includes: a first basis element, a second basis element, a first generating element and a second generating element; the first generating element is the opposite number of the conjugate operation result of the first basis element, and the second generating element is the conjugate operation result of the second basis element; the first basis element, the second basis element, the first generating element and the second generating element are complex numbers or block matrices.

[0271] Step 608: The terminal sends second indication information to the network side device; wherein the second indication information is used to indicate the target encoding codeword.

[0272] Optionally, the second indication information includes at least one of the following: a transmit diversity order and a codeword matrix indicator; codebook dimension indication information and a codeword matrix indicator.

[0273] Optionally, the carrying method of the second indication information includes one of the following: the second indication information is carried by MACCE; the second indication information is carried by a preamble code; the second indication information is carried by a sequence.

[0274] It should be noted that the embodiment of the present application does not limit the execution order between step 604 and step 605. Any one of step 604 and step 605 can be executed first, or the steps can be executed simultaneously.

[0275] Step 609: The terminal performs diversity transmission based on the target coding codeword.

[0276] In the diversity transmission method provided in the embodiment of the present application, the terminal autonomously determines a target coding codeword that satisfies the target coding structure and sends the target coding codeword to the network-side device. The target coding codeword is a coding matrix with a dimension of N×N; the target coding structure includes: a first basic element, a second basic element, a first generating element, and a second generating element; the first generating element is the inverse of the conjugate operation result of the first basic element, and the second generating element is the conjugate operation result of the second basic element; the first basic element, the second basic element, the first generating element, and the second generating element are complex numbers or block matrices; compared to related technologies, the target coding codeword designed based on the target coding structure in the embodiment of the present application can not only ensure diversity gain, but also reduce the types of reflection coefficients required on each antenna, that is, it can reduce the types of load impedances required on each antenna, thereby reducing the complexity of system implementation and effectively reducing the probability of detection errors.

[0277] Scenario 4: The terminal triggers terminal diversity transmission; the terminal determines and indicates a codebook.

[0278] Figure 7This is the fourth signaling interaction diagram of the diversity transmission method provided in the embodiment of the present application, such as Figure 7 As shown, the method includes steps 701-709; wherein:

[0279] Step 701: The terminal reports terminal capability information to the network device.

[0280] Optionally, the terminal includes a BSC UE; the terminal capability information includes at least one of the following: a modulation mode supported by the BSC UE and an antenna capability of the BSC UE.

[0281] Step 702: The network-side device determines the modulation mode, channel coding and decoding mode, and data transmission scheduling mode according to the terminal capability information.

[0282] Step 703: When the first target condition is met, the terminal decides to trigger transmit diversity transmission.

[0283] Step 704: The terminal sends first trigger information to the network side device; wherein the first trigger information is used to instruct the network side device to trigger diversity transmission of the terminal.

[0284] Step 705: The network-side device sends third indication information to the terminal; wherein the third indication information is used to instruct the terminal to send a measurement reference signal on M transmitting antennas.

[0285] Optionally, the third indication information includes at least one of the following: information for indicating the time or duty cycle of the measurement reference signal sent by the terminal on each of the M transmitting antennas; information for indicating the sequence of the measurement reference signal sent by the terminal on each of the M transmitting antennas; information for indicating the frequency, bandwidth or frequency shift of the measurement reference signal sent by the terminal on each of the M transmitting antennas.

[0286] Optionally, the carrying method of the third indication information includes one of the following: the third indication information is carried through DCI; the third indication information is carried through a preamble sequence; the third indication information is carried through a signal sequence; wherein the signal sequence includes: a signal sequence encrypted with the BSC UE ID or encrypted with a random number related to the BSC UE ID, or a signal sequence carrying the BSCUE ID; the third indication information is carried through the MAC CE.

[0287] Step 706: After the terminal receives the third indication information sent by the network-side device, the terminal sends a measurement reference signal on M transmit antennas based on the third indication information.

[0288] Optionally, the implementation method of the terminal sending the measurement reference signal on M transmitting antennas based on the third indication information may include: the terminal sending the measurement reference signal on the M transmitting antennas at different times based on the third indication information; the terminal sending the measurement reference signal on the M transmitting antennas at the same time based on the third indication information, and the measurement reference signals sent on different transmitting antennas are all scrambled with random numbers related to the index information of the corresponding antenna.

[0289] Step 707: The terminal determines the target encoding codeword based on the terminal's capability information and / or channel state information;

[0290] Wherein, the target coding codeword satisfies the target coding structure; the target coding codeword is a coding matrix with a dimension of N×N; N=2 k , k is a positive integer; the target coding structure includes: a first basis element, a second basis element, a first generating element and a second generating element; the first generating element is the opposite number of the conjugate operation result of the first basis element, and the second generating element is the conjugate operation result of the second basis element; the first basis element, the second basis element, the first generating element and the second generating element are complex numbers or block matrices.

[0291] Step 708: The terminal sends second indication information to the network side device; wherein the second indication information is used to indicate the target encoding codeword.

[0292] It should be noted that the first trigger information and the second indication information can be carried in a unified manner, that is, carried in one signaling at the same time, or can be carried independently.

[0293] Optionally, the second indication information includes at least one of the following: a transmit diversity order and a codeword matrix indicator; codebook dimension indication information and a codeword matrix indicator.

[0294] Optionally, the carrying method of the second indication information includes one of the following: the second indication information is carried by MACCE; the second indication information is carried by a preamble code; the second indication information is carried by a sequence.

[0295] It should be noted that the embodiment of the present application does not limit the execution order between step 704 and step 708. Any one of step 704 and step 708 can be executed first, or the steps can be executed simultaneously.

[0296] Step 709: The terminal performs diversity transmission based on the target coding codeword.

[0297] In the diversity transmission method provided in the embodiment of the present application, the terminal autonomously determines a target coding codeword that satisfies the target coding structure and sends the target coding codeword to the network-side device. The target coding codeword is a coding matrix with a dimension of N×N; the target coding structure includes: a first basic element, a second basic element, a first generating element, and a second generating element; the first generating element is the inverse of the conjugate operation result of the first basic element, and the second generating element is the conjugate operation result of the second basic element; the first basic element, the second basic element, the first generating element, and the second generating element are complex numbers or block matrices; compared to related technologies, the target coding codeword designed based on the target coding structure in the embodiment of the present application can not only ensure diversity gain, but also reduce the types of reflection coefficients required on each antenna, that is, it can reduce the types of load impedances required on each antenna, thereby reducing the complexity of system implementation and effectively reducing the probability of detection errors.

[0298] The diversity transmission method provided in the embodiment of the present application can be executed by a diversity transmission device. In the embodiment of the present application, the diversity transmission device provided in the embodiment of the present application is described by taking the diversity transmission method performed by the diversity transmission device as an example.

[0299] Figure 8 This is one of the structural diagrams of the diversity transmission device provided in the embodiment of the present application, such as Figure 8 As shown, the diversity transmission device 800 is applied to a terminal and includes: a first determination module 801 and a transmission module 802, wherein:

[0300] A first determination module 801 is used to determine a target encoding codeword;

[0301] A transmission module 802, configured to perform diversity transmission based on the target coding codeword;

[0302] Wherein, the target coding codeword satisfies the target coding structure; the target coding codeword is a coding matrix with a dimension of N×N; N=2 k , k is a positive integer; the target coding structure includes: a first basis element, a second basis element, a first generating element and a second generating element; the first generating element is the opposite number of the conjugate operation result of the first basis element, and the second generating element is the conjugate operation result of the second basis element; the first basis element, the second basis element, the first generating element and the second generating element are complex numbers or block matrices.

[0303] In the diversity transmission device provided in the embodiment of the present application, multi-antenna transmit diversity transmission is performed by determining and using a target coding codeword that satisfies the target coding structure, and the target coding codeword is a coding matrix with a dimension of N×N; the target coding structure includes: a first basic element, a second basic element, a first generating element, and a second generating element; the first generating element is the opposite number of the conjugate operation result of the first basic element, and the second generating element is the conjugate operation result of the second basic element; the first basic element, the second basic element, the first generating element, and the second generating element are complex numbers or block matrices; compared with the related art, the target coding codeword designed based on the target coding structure in the embodiment of the present application can not only ensure diversity gain, but also reduce the types of reflection coefficients required on each antenna, that is, it can reduce the types of load impedances required on each antenna, thereby reducing the complexity of system implementation and effectively reducing the probability of detection error.

[0304] Optionally, the target coding structure is represented by S;

[0305]

[0306] The elements in S include S 12 、S 34 、 and S 12 is the first basic element, S 34 is the second basic element, For the second generated element, is the first generating element; the S 12 、S 34 、 and Meet at least one of the following:

[0307] When N is equal to 2, the S 12 、S 34 、 and All are plural, For S 34 The complex conjugate of For S 12 The opposite of the conjugate complex number;

[0308] When N is greater than 2, the S 12 、S 34 、 and are all block matrices of dimension L×L, where L=N / 2, and elements in each of the block matrices are complex numbers, where 1<L<N; For S 34The conjugate matrix of For S 12 The inverse of the conjugate matrix of .

[0309] Optionally, when N is equal to 2, S 12 =s1,S 34 =s2, In the case of , the target encoding codeword is S2;

[0310]

[0311] Wherein, the elements in S2 are all complex numbers; is the complex conjugate of s2, is the opposite of the complex conjugate of s1.

[0312] Optionally, when N is equal to 4, In the case of , the target encoding codeword is S4;

[0313]

[0314] Wherein, the elements in S4 are all complex numbers; is the complex conjugate of s2, is the complex conjugate of s3, is the complex conjugate of s4, is the opposite of the complex conjugate of s1, is the opposite of the complex conjugate of s2, It is the opposite of the conjugate complex number of s3, -s2 is the opposite of s2, and -s3 is the opposite of s3.

[0315] Optionally, the first determining module 801 is specifically configured to:

[0316] Receive first indication information sent by a network side device; wherein the first indication information is used to indicate a target encoding codeword;

[0317] Based on the first indication information, the target encoding codeword is determined.

[0318] Optionally, the first indication information includes at least one of the following:

[0319] Transmit diversity order and codeword matrix indicator;

[0320] Codebook dimension indication information and codeword matrix indicator.

[0321] Optionally, a carrying mode of the first indication information includes one of the following:

[0322] The first indication message is carried by downlink control information DCI;

[0323] The first indication information is carried by a preamble sequence;

[0324] The first indication information is carried by a signal sequence; wherein the signal sequence includes: a signal sequence scrambled by a backscatter communication device identifier BSC UE ID or a random number related to the BSC UE, or a signal sequence carrying the BSC UE ID;

[0325] The first indication information is carried by a medium access control MAC control element CE.

[0326] Optionally, the first determining module 801 is specifically configured to determine the target encoding codeword based on capability information and / or channel state information of the terminal.

[0327] Optionally, the diversity transmission device 800 further includes:

[0328] The second sending module is used for the terminal to send second indication information to the network side device; wherein, the second indication information is used to indicate the target encoding codeword.

[0329] Optionally, the second indication information includes at least one of the following:

[0330] Transmit diversity order and codeword matrix indicator;

[0331] Codebook dimension indication information and codeword matrix indicator.

[0332] Optionally, a carrying mode of the second indication information includes one of the following:

[0333] The second indication information is carried by the MAC CE;

[0334] The second indication information is carried by a preamble;

[0335] The second indication information is carried by a sequence.

[0336] Optionally, the first determination module 801 is specifically configured to determine the target encoding codeword when a first target condition is met.

[0337] Optionally, the diversity transmission device 800 further includes:

[0338] The third sending module is used to send first trigger information to the network side device when the first target condition is met; wherein the first trigger information is used to instruct the network side device to trigger the terminal to perform diversity transmission.

[0339] Optionally, the first target condition includes at least one of the following:

[0340] The energy of the reverse transmission signal of the terminal is lower than a first threshold;

[0341] The terminal is located at the edge of a cell;

[0342] The number of times the terminal sends a negative acknowledgement NACK exceeds a second threshold;

[0343] The energy of the downlink received signal is lower than a third threshold.

[0344] Optionally, the diversity transmission device 800 further includes:

[0345] The first receiving module is used to receive second trigger information sent by the network side device; wherein the second trigger information is used to trigger terminal diversity transmission.

[0346] Optionally, a carrying manner of the second trigger information includes one of the following:

[0347] The second trigger message is carried by DCI;

[0348] The second trigger information is carried by a preamble sequence;

[0349] The second trigger information is carried by a signal sequence; wherein the signal sequence includes: a signal sequence scrambled by a BSC UE ID or a random number related to the BSC UE, or a signal sequence carrying the BSC UE ID;

[0350] The second trigger information is carried by MAC CE.

[0351] Optionally, the diversity transmission device 800 further includes:

[0352] A second receiving module is configured to receive third indication information sent by the network side device; wherein the third indication information is used to instruct the terminal to send a measurement reference signal on M transmit antennas;

[0353] The fourth sending module is configured to send a measurement reference signal on M transmitting antennas based on the third indication information.

[0354] Optionally, the fourth sending module is specifically configured to:

[0355] Based on the third indication information, respectively send measurement reference signals on the M transmit antennas at different times; or,

[0356] Based on the third indication information, measurement reference signals are respectively sent on the M transmitting antennas at the same time, and the measurement reference signals sent on different transmitting antennas are all scrambled with random numbers related to index information of corresponding antennas.

[0357] Optionally, the third indication information includes at least one of the following:

[0358] Information used to indicate a time or a duty cycle of a measurement reference signal sent by the terminal on each of the M transmitting antennas;

[0359] Information used to indicate a sequence of a measurement reference signal sent by the terminal on each of the M transmitting antennas;

[0360] Information used to indicate the frequency, bandwidth, or frequency shift of a measurement reference signal sent by the terminal on each of the M transmitting antennas.

[0361] Optionally, the carrying mode of the third indication information includes one of the following:

[0362] The third indication information is carried by DCI;

[0363] The third indication information is carried by the preamble sequence;

[0364] The third indication information is carried by a signal sequence; wherein the signal sequence includes: a signal sequence scrambled by the BSC UE ID or a random number related to the BSC UE ID, or a signal sequence carrying the BSC UE ID;

[0365] The third indication information is carried by the MAC CE.

[0366] The diversity transmission device in the embodiments of the present application can be an electronic device, such as an electronic device with an operating system, or a component of an electronic device, such as an integrated circuit or chip. The electronic device can be a terminal or other device other than a terminal. For example, the terminal can include but is not limited to the types of terminal 11 listed above, and other devices can include servers, network attached storage (NAS), etc., which are not specifically limited in the embodiments of the present application.

[0367] The diversity transmission device provided in the embodiment of the present application can achieve Figure 2 The various processes implemented by the method embodiment achieve the same technical effect and are not described here again to avoid repetition.

[0368] Figure 9 This is the second structural diagram of the diversity transmission device provided in the embodiment of the present application. Figure 9 As shown, the diversity transmission device 900 is applied to a network side device and includes: a second determination module 901 and a first sending module 902, wherein:

[0369] A second determination module 901 is used to determine a target encoding codeword;

[0370] A first sending module 902 is configured to send first indication information to a terminal; wherein the first indication information is used to indicate the target encoding codeword;

[0371] Wherein, the target coding codeword satisfies the target coding structure; the target coding codeword is a coding matrix with a dimension of N×N; N=2 k , k is a positive integer; the target coding structure includes: a first basis element, a second basis element, a first generating element and a second generating element; the first generating element is the opposite number of the conjugate operation result of the first basis element, and the second generating element is the conjugate operation result of the second basis element; the first basis element, the second basis element, the first generating element and the second generating element are complex numbers or block matrices.

[0372] In the diversity transmission device provided in the embodiment of the present application, by determining a target coding codeword that meets the target coding structure and sending the target coding codeword to the terminal, the terminal is instructed to use the target coding codeword for multi-antenna transmit diversity transmission, and the target coding codeword is a coding matrix with a dimension of N×N; the target coding structure includes: a first basic element, a second basic element, a first generating element, and a second generating element; the first generating element is the opposite number of the conjugate operation result of the first basic element, and the second generating element is the conjugate operation result of the second basic element; the first basic element, the second basic element, the first generating element, and the second generating element are complex numbers or block matrices; compared with the related art, the target coding codeword designed based on the target coding structure in the embodiment of the present application can not only ensure diversity gain, but also reduce the types of reflection coefficients required on each antenna, that is, it can reduce the types of load impedances required on each antenna, thereby reducing the complexity of system implementation and effectively reducing the probability of detection error.

[0373] Optionally, the first indication information includes at least one of the following:

[0374] Transmit diversity order and codeword matrix indicator;

[0375] Codebook dimension indication information and codeword matrix indicator.

[0376] Optionally, a carrying mode of the first indication information includes one of the following:

[0377] The first indication message is carried by downlink control information DCI;

[0378] The first indication information is carried by a preamble sequence;

[0379] The first indication information is carried by a signal sequence; wherein the signal sequence includes: a signal sequence scrambled by a backscatter communication device identifier BSC UE ID or a random number related to the BSC UE ID, or a signal sequence carrying the BSC UE ID;

[0380] The first indication information is carried by a medium access control MAC control element CE.

[0381] Optionally, the second determining module 901 is specifically configured to determine the target encoding codeword based on the capability information and / or channel state information of the terminal when a second target condition is met.

[0382] Optionally, the second target condition includes at least one of the following:

[0383] The energy of the reverse transmission signal of the terminal is lower than a first threshold;

[0384] The terminal is located at the edge of a cell;

[0385] The number of times the terminal sends a negative acknowledgement NACK exceeds a second threshold;

[0386] The network-side device receives first trigger information sent by the terminal; wherein the first trigger information is used to instruct the network-side device to trigger the terminal to perform diversity transmission.

[0387] Optionally, a carrying mode of the first trigger information includes one of the following:

[0388] The first trigger information is carried by a preamble sequence;

[0389] The first trigger information is carried by a signal sequence; wherein the signal sequence includes: a signal sequence scrambled by a BSC UE ID or a random number related to the BSC UE, or a signal sequence carrying the BSC UE ID;

[0390] The first trigger information is carried by MAC CE.

[0391] Optionally, the diversity transmission device 900 further includes:

[0392] The fifth sending module is used to send second trigger information to the terminal when the second target condition is met; wherein the second trigger information is used to trigger terminal diversity transmission.

[0393] Optionally, a carrying manner of the second trigger information includes one of the following:

[0394] The second trigger message is carried by DCI;

[0395] The second trigger information is carried by a preamble sequence;

[0396] The second trigger information is carried by a signal sequence; wherein the signal sequence includes: a signal sequence scrambled by a BSC UE ID or a random number related to the BSC UE, or a signal sequence carrying the BSC UE ID;

[0397] The second trigger information is carried by MAC CE.

[0398] Optionally, the diversity transmission device 900 further includes:

[0399] The sixth sending module is used to send third indication information to the terminal when the second target condition is met; wherein the third indication information is used to instruct the terminal to send a measurement reference signal on M transmitting antennas.

[0400] Optionally, the third indication information includes at least one of the following:

[0401] Information used to indicate a time or period of a measurement reference signal sent by the terminal on each of the M transmitting antennas;

[0402] Information used to indicate a sequence of a measurement reference signal sent by the terminal on each of the M transmitting antennas;

[0403] Information used to indicate the frequency, bandwidth, or frequency shift of a measurement reference signal sent by the terminal on each of the M transmitting antennas.

[0404] The diversity transmission device provided in the embodiment of the present application can achieve Figure 3 The various processes implemented by the method embodiment achieve the same technical effect and are not described here again to avoid repetition.

[0405] Figure 10 is a schematic diagram of the structure of the communication device provided in the embodiment of the present application, such as Figure 10 As shown, the communication device 1000 includes a processor 1001 and a memory 1002. The memory 1002 stores a program or instruction that can be executed on the processor 1001. For example, when the communication device 1000 is a terminal, the program or instruction, when executed by the processor 1001, implements the various steps of the above-mentioned diversity transmission method embodiment and can achieve the same technical effect. When the communication device 1000 is a network-side device, the program or instruction, when executed by the processor 1001, implements the various steps of the above-mentioned diversity transmission method embodiment and can achieve the same technical effect. To avoid repetition, it is not repeated here.

[0406] The embodiment of the present application further provides a terminal, comprising a processor and a communication interface, wherein the processor is configured to determine a target encoding codeword; the communication interface is configured to perform diversity transmission based on the target encoding codeword;

[0407] Wherein, the target coding codeword satisfies the target coding structure; the target coding codeword is a coding matrix with a dimension of N×N; N=2 k , k is a positive integer; the target coding structure includes: a first basis element, a second basis element, a first generating element and a second generating element; the first generating element is the opposite number of the conjugate operation result of the first basis element, and the second generating element is the conjugate operation result of the second basis element; the first basis element, the second basis element, the first generating element and the second generating element are complex numbers or block matrices.

[0408] This terminal embodiment corresponds to the above-mentioned terminal side method embodiment. The various implementation processes and implementation methods of the above-mentioned method embodiment can be applied to this terminal embodiment and can achieve the same technical effects.

[0409] Figure 11 This is a schematic diagram of the structure of the terminal provided in the embodiment of the present application. Figure 11 As shown, the terminal 1100 includes but is not limited to: a radio frequency unit 1101, a network module 1102, an audio output unit 1103, an input unit 1104, a sensor 1105, a display unit 1106, a user input unit 1107, an interface unit 1108, a memory 1109 and at least some of the components of the processor 1110.

[0410] Those skilled in the art will understand that the terminal 1100 may also include a power supply (such as a battery) to power each component, and the power supply may be logically connected to the processor 1110 through a power management system, thereby implementing functions such as charging, discharging, and power consumption management through the power management system. Figure 11 The terminal structure shown in the figure does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently, which will not be repeated here.

[0411] It should be understood that in an embodiment of the present application, the input unit 1104 may include a graphics processing unit (GPU) 11041 and a microphone 11042, and the graphics processor 11041 processes the image data of a static picture or video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 1106 may include a display panel 11061, and the display panel 11061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 1107 includes a touch panel 11071 and at least one of other input devices 11072. The touch panel 11071 is also called a touch screen. The touch panel 11071 may include two parts: a touch detection device and a touch controller. Other input devices 11072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and an operating stick, which will not be repeated here.

[0412] In the embodiment of the present application, after receiving downlink data from a network-side device, the RF unit 1101 may transmit the data to the processor 1110 for processing. Furthermore, the RF unit 1101 may send uplink data to the network-side device. Typically, the RF unit 1101 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, and the like.

[0413] The memory 1109 can be used to store software programs or instructions and various data. The memory 1109 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, applications or instructions required for at least one function (such as a sound playback function, an image playback function, etc.). In addition, the memory 1109 may include a volatile memory or a non-volatile memory, or the memory 1109 may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDRSDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM), and a direct RAM bus random access memory (DRRAM). The memory 1109 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0414] Processor 1110 may include one or more processing units. Optionally, processor 1110 integrates an application processor and a modem processor. The application processor primarily handles operations related to the operating system, user interface, and application programs, while the modem processor primarily processes wireless communication signals, such as a baseband processor. It is understood that the modem processor may not be integrated into processor 1110.

[0415] The processor 1110 is configured to determine a target encoding codeword;

[0416] The radio frequency unit 1101 is configured to perform diversity transmission based on the target coding codeword;

[0417] Wherein, the target coding codeword satisfies the target coding structure; the target coding codeword is a coding matrix with a dimension of N×N; N=2k , k is a positive integer; the target coding structure includes: a first basis element, a second basis element, a first generating element and a second generating element; the first generating element is the opposite number of the conjugate operation result of the first basis element, and the second generating element is the conjugate operation result of the second basis element; the first basis element, the second basis element, the first generating element and the second generating element are complex numbers or block matrices.

[0418] The terminal provided in the embodiment of the present application performs multi-antenna transmit diversity transmission by determining and using a target coding codeword that satisfies a target coding structure, where the target coding codeword is a coding matrix of dimension ; the target coding structure includes: a first basic element, a second basic element, a first generating element, and a second generating element; the first generating element is the opposite of the result of the conjugate operation of the first basic element, and the second generating element is the result of the conjugate operation of the second basic element; the first basic element, the second basic element, the first generating element, and the second generating element are complex numbers or block matrices; compared with the related art, the target coding codeword designed based on the target coding structure in the embodiment of the present application can not only ensure diversity gain, but also reduce the types of reflection coefficients required on each antenna, that is, it can reduce the types of load impedances required on each antenna, thereby reducing the complexity of system implementation and effectively reducing the probability of detection error.

[0419] The embodiment of the present application further provides a network-side device, including a processor and a communication interface, wherein the processor is configured to determine a target encoding codeword when a second target condition is satisfied; the communication interface is configured to send first indication information to a terminal; wherein the first indication information is configured to indicate the target encoding codeword;

[0420] Wherein, the target coding codeword satisfies the target coding structure; the target coding codeword is a coding matrix with a dimension of N×N; N=2 k , k is a positive integer;

[0421] The target coding structure includes: a first basic element, a second basic element, a first generating element, and a second generating element; the first generating element is the opposite number of the conjugate operation result of the first basic element, and the second generating element is the conjugate operation result of the second basic element; the first basic element, the second basic element, the first generating element, and the second generating element are complex numbers or block matrices.

[0422] This network side device embodiment corresponds to the above-mentioned network side device method embodiment. Each implementation process and implementation method of the above-mentioned method embodiment can be applied to this network side device embodiment and can achieve the same technical effect.

[0423] Figure 12This is a schematic diagram of the structure of the network side device provided in the embodiment of the present application. Figure 12 As shown, network-side device 1200 includes an antenna 1201, a radio frequency device 1202, a baseband device 1203, a processor 1204, and a memory 1205. Antenna 1201 is connected to radio frequency device 1202. In the uplink direction, radio frequency device 1202 receives information via antenna 1201 and sends the received information to baseband device 1203 for processing. In the downlink direction, baseband device 1203 processes the information to be transmitted and sends it to radio frequency device 1202. Radio frequency device 1202 processes the received information and then sends it through antenna 1201.

[0424] The method executed by the network-side device in the above embodiment may be implemented in the baseband device 1203 , which includes a baseband processor.

[0425] The baseband device 1203 may include, for example, at least one baseband board on which a plurality of chips are arranged, such as Figure 12 As shown, one of the chips is, for example, a baseband processor, which is connected to the memory 1205 via a bus interface to call the program in the memory 1205 to execute the network device operations shown in the above method embodiment.

[0426] The network side device may further include a network interface 1206, which is, for example, a common public radio interface (CPRI).

[0427] Specifically, the network side device 1200 of the embodiment of the present invention further includes: instructions or programs stored in the memory 1205 and executable on the processor 1204, and the processor 1204 calls the instructions or programs in the memory 1205 to execute. Figure 7 The methods executed by the modules shown achieve the same technical effects, so they will not be described here to avoid repetition.

[0428] An embodiment of the present application further provides a diversity transmission system, comprising: a terminal and a network-side device, wherein the terminal can be used to execute the steps of the diversity transmission method described above, and the network-side device can be used to execute the steps of the diversity transmission method described above.

[0429] An embodiment of the present application also provides a readable storage medium, which can be volatile or non-volatile. The readable storage medium stores a program or instruction. When the program or instruction is executed by the processor, the various processes of the above-mentioned diversity transmission method embodiment are implemented and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0430] The processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0431] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned diversity transmission method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0432] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0433] An embodiment of the present application further provides a computer program / program product, which is stored in a storage medium. The computer program / program product is executed by at least one processor to implement the various processes of the above-mentioned diversity transmission method embodiment and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0434] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0435] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform, and of course 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 application, or the part that contributes to the prior art, can be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for enabling a terminal (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in each embodiment of the present application.

[0436] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A diversity transmission method, characterized in that: include: The terminal determines the target encoding codeword; The terminal performs diversity transmission based on the target coding codeword; the terminal includes a backscatter communication device; Wherein, the target coding codeword satisfies the target coding structure; the target coding codeword is a coding matrix with a dimension of N×N; N=2 k , k is a positive integer; the target coding structure includes: a first basis element, a second basis element, a first generator element, and a second generator element; the first generator element is the inverse of a conjugate operation result of the first basis element, and the second generator element is a conjugate operation result of the second basis element; the first basis element, the second basis element, the first generator element, and the second generator element are complex numbers or block matrices; the column index of the target coding structure represents different antenna indices, and the row index of the target coding structure represents different symbol periods; The target coding structure is denoted as S; The elements in S include S 12 、S 34 、 and S 12 is the first basic element, S 34 is the second basic element, For the second generated element, is the first generating element; the S 12 、S 34 、 and Meet at least one of the following: When N is equal to 2, the S 12 、S 34 、 and All are plural, For S 34 The complex conjugate of For S 12 The opposite of the conjugate complex number; When N is greater than 2, the S 12 、S 34 、 and are all block matrices of dimension L×L, where L=N / 2, and elements in each of the block matrices are complex numbers, where 1<L<N; For S 34 The conjugate matrix of For S 12 The inverse of the conjugate matrix of .

2. The diversity transmission method according to claim 1, wherein: When N is equal to 4, In the case of , the target encoding codeword is S4; Wherein, the elements in S4 are all complex numbers; is the complex conjugate of s2, is the complex conjugate of s3, is the complex conjugate of s4, is the opposite of the complex conjugate of s1, is the opposite of the complex conjugate of s2, It is the opposite of the conjugate complex number of s3, -s2 is the opposite of s2, and -s3 is the opposite of s3.

3. The diversity transmission method according to claim 1, wherein: The terminal determines a target encoding codeword, including: The terminal receives first indication information sent by the network side device; wherein the first indication information is used to indicate the target encoding codeword; The terminal determines the target encoding codeword based on the first indication information.

4. The diversity transmission method according to claim 3, wherein: The first indication information includes at least one of the following: Transmit diversity order and codeword matrix indicator; Codebook dimension indication information and codeword matrix indicator.

5. The diversity transmission method according to claim 3 or 4, characterized in that: The carrying mode of the first indication information includes one of the following: The first indication information is carried by downlink control information DCI; The first indication information is carried by a preamble sequence; The first indication information is carried by a signal sequence; wherein the signal sequence includes: a signal sequence scrambled by a backscatter communication device identifier BSC UE ID or a random number related to the BSC UE, or a signal sequence carrying the BSC UE ID; The first indication information is carried by a medium access control MAC control element CE.

6. The diversity transmission method according to claim 1, wherein: The terminal determines a target encoding codeword, including: The terminal determines the target encoding codeword based on the capability information and / or channel state information of the terminal.

7. The diversity transmission method according to claim 6, wherein: The method further comprises: The terminal sends second indication information to the network side device; wherein the second indication information is used to indicate the target encoding codeword.

8. The diversity transmission method according to claim 7, wherein: The second indication information includes at least one of the following: Transmit diversity order and codeword matrix indicator; Codebook dimension indication information and codeword matrix indicator.

9. The diversity transmission method according to claim 7 or 8, characterized in that: The carrying mode of the second indication information includes one of the following: The second indication information is carried by the MAC CE; The second indication information is carried by a preamble; The second indication information is carried by a sequence.

10. The diversity transmission method according to claim 6, wherein: The terminal determines a target encoding codeword, including: The terminal determines the target encoding codeword when a first target condition is met.

11. The diversity transmission method according to claim 1, wherein: The method further comprises: When a first target condition is met, the terminal sends first trigger information to a network-side device; wherein the first trigger information is used to instruct the network-side device to trigger diversity transmission of the terminal.

12. The diversity transmission method according to claim 11, wherein: The carrying mode of the first trigger information includes one of the following: The first trigger information is carried by a preamble sequence; The first trigger information is carried by a signal sequence; wherein the signal sequence includes: a signal sequence scrambled by a BSC UE ID or a random number related to the BSC UE, or a signal sequence carrying the BSC UE ID; The first trigger information is carried by MAC CE.

13. The diversity transmission method according to claim 10 or 11, characterized in that: The first target condition includes at least one of the following: The energy of the reverse transmission signal of the terminal is lower than a first threshold; The terminal is located at the edge of a cell; The number of times the terminal sends a negative acknowledgement NACK exceeds a second threshold; The energy of the downlink received signal is lower than a third threshold.

14. The diversity transmission method according to claim 1, wherein: The method further comprises: The terminal receives second trigger information sent by a network-side device; wherein the second trigger information is used to trigger terminal diversity transmission.

15. The diversity transmission method according to claim 14, wherein: The carrying mode of the second trigger information includes one of the following: The second trigger information is carried by DCI; The second trigger information is carried by a preamble sequence; The second trigger information is carried by a signal sequence; wherein the signal sequence includes: a signal sequence scrambled by a BSC UE ID or a random number related to the BSC UE, or a signal sequence carrying the BSC UE ID; The second trigger information is carried by MAC CE.

16. The diversity transmission method according to claim 1, wherein: The method further comprises: The terminal receives third indication information sent by the network side device; wherein the third indication information is used to instruct the terminal to send a measurement reference signal on M transmit antennas; The terminal sends a measurement reference signal on M transmit antennas based on the third indication information.

17. The diversity transmission method according to claim 16, wherein: The terminal sending, based on the third indication information, a measurement reference signal on M transmit antennas, including: The terminal sends measurement reference signals on the M transmit antennas respectively at different times based on the third indication information; or Based on the third indication information, the terminal sends measurement reference signals on the M transmit antennas respectively at the same time, and the measurement reference signals sent on different transmit antennas are all scrambled with random numbers related to index information of corresponding antennas.

18. The diversity transmission method according to claim 16, wherein: The third indication information includes at least one of the following: Information used to indicate a time or a duty cycle of a measurement reference signal sent by the terminal on each of the M transmitting antennas; Information used to indicate a sequence of a measurement reference signal sent by the terminal on each of the M transmitting antennas; Information used to indicate the frequency, bandwidth, or frequency shift of a measurement reference signal sent by the terminal on each of the M transmitting antennas.

19. The diversity transmission method according to any one of claims 16 to 18, characterized in that: The carrying mode of the third indication information includes one of the following: The third indication information is carried by DCI; The third indication information is carried by the preamble sequence; The third indication information is carried by a signal sequence; wherein the signal sequence includes: a signal sequence scrambled by the BSC UE ID or a random number related to the BSC UEID, or a signal sequence carrying the BSC UEID; The third indication information is carried by the MAC CE.

20. A diversity transmission method, characterized in that: include: The network side device determines the target encoding codeword; The network side device sends first indication information to the terminal; wherein the first indication information is used to indicate the target encoding codeword; the terminal includes a backscatter communication device; Wherein, the target coding codeword satisfies the target coding structure; the target coding codeword is a coding matrix with a dimension of N×N; N=2 k , k is a positive integer; the target coding structure includes: a first basis element, a second basis element, a first generator element, and a second generator element; the first generator element is the inverse of a conjugate operation result of the first basis element, and the second generator element is a conjugate operation result of the second basis element; the first basis element, the second basis element, the first generator element, and the second generator element are complex numbers or block matrices; the column index of the target coding structure represents different antenna indices, and the row index of the target coding structure represents different symbol periods; The target coding structure is denoted as S; The elements in S include S 12 、S 34 、 and S 12 is the first basic element, S 34 is the second basic element, For the second generated element, is the first generating element; the S 12 、S 34 、 and Meet at least one of the following: When N is equal to 2, the S 12 、S 34 、 and All are plural, For S 34 The complex conjugate of For S 12 The opposite of the conjugate complex number of ; When N is greater than 2, the S 12 、S 34 、 and are all block matrices of dimension L×L, where L=N / 2, and elements in each of the block matrices are complex numbers, where 1<L<N; For S 34 The conjugate matrix of For S 12 The inverse of the conjugate matrix of .

21. The diversity transmission method according to claim 20, wherein: The first indication information includes at least one of the following: Transmit diversity order and codeword matrix indicator; Codebook dimension indication information and codeword matrix indicator.

22. The diversity transmission method according to claim 20 or 21, characterized in that: The carrying mode of the first indication information includes one of the following: The first indication information is carried by downlink control information DCI; The first indication information is carried by a preamble sequence; The first indication information is carried by a signal sequence; wherein the signal sequence includes: a signal sequence scrambled by a backscatter communication device identifier BSC UE ID or a random number related to the BSC UE ID, or a signal sequence carrying the BSC UE ID; The first indication information is carried by a medium access control MAC control element CE.

23. The diversity transmission method according to claim 20, wherein: The network side device determines the target encoding codeword, including: When the second target condition is met, the network side device determines the target encoding codeword based on the capability information and / or channel state information of the terminal.

24. The diversity transmission method according to claim 23, wherein: The second target condition includes at least one of the following: The energy of the reverse transmission signal of the terminal is lower than a first threshold; The terminal is located at the edge of a cell; The number of times the terminal sends a negative acknowledgement NACK exceeds a second threshold; The network side device receives first trigger information sent by the terminal; wherein the first trigger information is used to instruct the network side device that the terminal triggers diversity transmission.

25. The diversity transmission method according to claim 24, characterized in that: The carrying mode of the first trigger information includes one of the following: The first trigger information is carried by a preamble sequence; The first trigger information is carried by a signal sequence; wherein the signal sequence includes: a signal sequence scrambled by a BSC UE ID or a random number related to the BSC UE, or a signal sequence carrying the BSC UE ID; The first trigger information is carried by MAC CE.

26. The diversity transmission method according to claim 20, wherein: The method further comprises: When a second target condition is met, the network-side device sends second trigger information to the terminal; wherein the second trigger information is used to trigger terminal diversity transmission.

27. The diversity transmission method according to claim 26, wherein: The carrying mode of the second trigger information includes one of the following: The second trigger information is carried by DCI; The second trigger information is carried by a preamble sequence; The second trigger information is carried by a signal sequence; wherein the signal sequence includes: a signal sequence scrambled by a BSC UE ID or a random number related to the BSC UE, or a signal sequence carrying the BSC UE ID; The second trigger information is carried by MAC CE.

28. The diversity transmission method according to claim 20, wherein: The method further comprises: When the second target condition is met, the network-side device sends third indication information to the terminal; wherein the third indication information is used to instruct the terminal to send a measurement reference signal on M transmit antennas.

29. The diversity transmission method according to claim 28, wherein: The third indication information includes at least one of the following: Information used to indicate a time or period of a measurement reference signal sent by the terminal on each of the M transmitting antennas; Information used to indicate a sequence of a measurement reference signal sent by the terminal on each of the M transmitting antennas; Information used to indicate the frequency, bandwidth, or frequency shift of a measurement reference signal sent by the terminal on each of the M transmitting antennas.

30. A diversity transmission device, applied to a terminal, characterized in that: include: A first determination module is used to determine a target encoding codeword; a transmission module configured to perform diversity transmission based on the target coding codeword; the terminal comprising a backscatter communication device; Wherein, the target coding codeword satisfies the target coding structure; the target coding codeword is a coding matrix with a dimension of N×N; N=2 k , k is a positive integer; the target coding structure includes: a first basis element, a second basis element, a first generator element, and a second generator element; the first generator element is the inverse of a conjugate operation result of the first basis element, and the second generator element is a conjugate operation result of the second basis element; the first basis element, the second basis element, the first generator element, and the second generator element are complex numbers or block matrices; the column index of the target coding structure represents different antenna indices, and the row index of the target coding structure represents different symbol periods; The target coding structure is denoted as S; The elements in S include S 12 、S 34 、 and S 12 is the first basic element, S 34 is the second basic element, For the second generated element, is the first generating element; the S 12 、S 34 、 and Meet at least one of the following: When N is equal to 2, the S 12 、S 34 、 and All are plural, For S 34 The complex conjugate of For S 12 The opposite of the conjugate complex number of ; When N is greater than 2, the S 12 、S 34 、 and are all block matrices of dimension L×L, where L=N / 2, and elements in each of the block matrices are complex numbers, where 1<L<N; For S 34 The conjugate matrix of For S 12 The inverse of the conjugate matrix of .

31. A diversity transmission device, applied to a network side device, characterized in that: A second determination module is used to determine the target encoding codeword; A first sending module is configured to send first indication information to a terminal; wherein the first indication information is used to indicate the target encoding codeword; and the terminal includes a backscatter communication device; Wherein, the target coding codeword satisfies the target coding structure; the target coding codeword is a coding matrix with a dimension of N×N; N=2 k , k is a positive integer; the target coding structure includes: a first basis element, a second basis element, a first generator element, and a second generator element; the first generator element is the inverse of a conjugate operation result of the first basis element, and the second generator element is a conjugate operation result of the second basis element; the first basis element, the second basis element, the first generator element, and the second generator element are complex numbers or block matrices; the column index of the target coding structure represents different antenna indices, and the row index of the target coding structure represents different symbol periods; The target coding structure is denoted as S; The elements in S include S 12 、S 34 、 and S 12 is the first basic element, S 34 is the second basic element, For the second generated element, is the first generating element; the S 12 、S 34 、 and Meet at least one of the following: When N is equal to 2, the S 12 、S 34 、 and All are plural, For S 34 The complex conjugate of For S 12 The opposite of the conjugate complex number; When N is greater than 2, the S 12 、S 34 、 and are all block matrices of dimension L×L, where L=N / 2, and elements in each of the block matrices are complex numbers, where 1<L<N; For S 34 The conjugate matrix of For S 12 The inverse of the conjugate matrix of .

32. A terminal, characterized in that: The method comprises a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the diversity transmission method according to any one of claims 1 to 19 are implemented.

33. A network side device, characterized in that: The method comprises a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the diversity transmission method according to any one of claims 20 to 29 are implemented.

34. A readable storage medium, characterized in that The readable storage medium stores a program or instruction, and when the program or instruction is executed by the processor, it implements the diversity transmission method according to any one of claims 1 to 19, or implements the steps of the diversity transmission method according to any one of claims 20 to 29.

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