WO2022257572A1

WO2022257572A1 - Methods for transmitting and receiving reference signal, and apparatus

Info

Publication number: WO2022257572A1
Application number: PCT/CN2022/084600
Authority: WO
Inventors: 吴海兵; 李雪茹
Original assignee: 华为技术有限公司
Priority date: 2021-06-10
Filing date: 2022-03-31
Publication date: 2022-12-15
Also published as: CN115473778A

Abstract

The present application provides methods for transmitting and receiving a reference signal, and an apparatus, capable of enhancing the anti-interference capability of a sequence and reducing interference between sequences sent by different devices. The method for transmitting a reference signal comprises: a transmitting end apparatus determining a first sequence, determining a second sequence according to the first sequence, then transmitting the second sequence. A receiving end apparatus acquires a received signal comprising a reference signal of the second sequence, and processes the received signal according to the second sequence. The length of the first sequence is L; the second sequence comprises a number N^* _symb of subsequences; a subsequence of the second sequence comprises a number M of elements; the kth element of the l^*-th subsequence is the N^* _symb×k+l^*-th element of the first sequence; l^*＝0,…,N^* _symb-1; k＝0,…,M-1; N^* _symb=L/M; the second sequence is carried by a first time unit group, the first time unit group comprising N^* _symb time units, and the l^*-th time unit in the first time unit group carrying the l^*-th subsequence of the second sequence.

Description

Reference signal sending and receiving method and device

This application claims the priority of the Chinese patent application submitted to the State Intellectual Property Office on June 10, 2021, with the application number 202110645411.6, and the application title "An Information Processing Method, Terminal, and Network Equipment" and filed on August 26, 2021 The priority of the Chinese patent application with the application number 202110991104.3 and the application title "Method and Device for Sending and Receiving Reference Signals" filed with the State Intellectual Property Office on the 1st, the entire contents of which are incorporated in this application by reference.

technical field

The present application relates to the technical field of communications, and in particular to methods and devices for sending and receiving reference signals.

Background technique

In a mobile communication system, the distance measurement between devices can be realized through serial transmission. For example, the sending end can send a sequence to the receiving end. After receiving the sequence from the sending end (referred to as the receiving sequence), the receiving end performs a correlation operation on the received sequence and the local sequence generated locally by the receiving end. According to the peak position of the correlation operation, Determine the distance between the receiving end and the sending end.

However, in a scenario with many devices, different devices may send sequences on the same time-frequency resource. At this time, the sequences sent by different devices will interfere with each other.

Contents of the invention

The present application provides a method and device for sending and receiving reference signals, which can enhance the anti-interference capability of sequences and reduce interference between sequences sent by different devices.

In the first aspect, a method for sending a reference signal is provided. The method may be executed by a sending device, or may be executed by a component of the sending device, such as a processor, a chip, or a chip system of the sending device, or may be Realized by a logic module or software that can realize all or part of the functions of the sending end device. The method includes: determining a first sequence, and determining a second sequence according to the first sequence, and then sending the second sequence. Among them, the length of the first sequence is L; the second sequence includes

subsequence, the subsequence of the second sequence includes M elements, and the kth element in the l ^* th subsequence is the first sequence in the first sequence

elements, or, the kth element in the l ^* th subsequence of the second sequence is the first sequence in the first sequence

elements,

k=0,...,M-1,

The second sequence is carried by the first time unit group consisting of

time units, the l ^* th time unit in the first time unit group carries the l ^* th subsequence of the second sequence.

Based on this solution, this application splits the longer sequence into multiple time units, so that the split sequence can still be reassembled into a complete long sequence when it is processed at the receiving end, thus effectively increasing the length, which enhances the anti-interference ability of the sequence and reduces the interference between sequences sent by different devices.

With reference to the first aspect, in some embodiments of the first aspect, the l ^* th time unit of the first time unit group also carries the first cyclic prefix corresponding to the l ^* th subsequence of the second sequence, the second sequence The first cyclic prefix corresponding to the l ^* th subsequence of includes the last M1 elements of the l ^* th subsequence of the second sequence.

Based on this implementation manner, each time unit carries a cyclic prefix, which can reduce subcarrier interference and inter-symbol interference, thereby further reducing interference between sequences sent by different devices.

With reference to the first aspect, in some implementations of the first aspect, the starting time unit of the first time unit group also carries a second cyclic prefix, and the second cyclic prefix includes the last subsequence M1 of the second sequence elements, or in other words, the second cyclic prefix includes the last M1 elements of the second sequence.

Based on this implementation manner, the second cyclic prefix is carried on the starting time unit of the first time unit group, and the cyclic prefix is not sent on other time units, thereby reducing resource overhead. In addition, the cyclic prefix can reduce subcarrier interference and inter-symbol interference, thereby further reducing the interference between sequences sent by different devices.

With reference to the first aspect, in some embodiments of the first aspect, the first time unit group is included in the second time unit group, the second time unit group includes N _symb time units, and N _symb is greater than

The first time unit group consists of

time units are not consecutive within the second time unit group.

Based on this embodiment, the sending end device sends the second sequence on some time units in the second time unit group, so that data can be sent on another part of the time units in the second time unit group, so as to achieve the gap between data transmission and sequence transmission. The balance between them can reduce the waiting delay of data transmission and improve the flexibility of sequence transmission.

With reference to the first aspect, in some embodiments of the first aspect, the first time unit group is included in the second time unit group, the second time unit group includes N _symb time units, and N _symb is equal to

The first time unit group consists of

time units are consecutive within the second time unit group.

With reference to the first aspect, in some implementations of the first aspect, there is a mapping relationship between l ^* and l ^** , and the mapping relationship is that the l ^** th time unit of the second time unit group carries the lth time unit of the second sequence ^* subsequence.

With reference to the first aspect, in some implementation manners of the first aspect, the method further includes: sending first indication information to the receiver device, where the first indication information is used to indicate the mapping relationship between l ^* and l ^** .

With reference to the first aspect, in some implementations of the first aspect, the method further includes: sending second indication information to the receiving end device, where the second indication information is used to indicate at least one of the following:

The length of the first sequence, the generation parameters of the first sequence, and the number of subsequences included in the second sequence

The number M of elements included in the subsequence, or the time domain position of the starting time unit in the first time unit group.

With reference to the first aspect, in some implementations of the first aspect, sending the second indication information to the receiving end device includes: sending radio resource control RRC signaling to the receiving end device, where the RRC signaling carries the second indication information; or , sending downlink control information DCI to the receiving end device, DCI carrying second indication information; or, sending sidelink control information SCI to the receiving end device, SCI carrying second indication information; or, sending RRC signaling to the receiving end device and DCI, the RRC signaling carries part of the second indication information, and the DCI carries another part of the second indication information; or, sends RRC signaling and SCI to the receiving end device, and the RRC signaling carries part of the second indication information , the SCI carries another part of the second indication information.

Based on this implementation manner, the sending-end device may send the second indication information to the receiving-end device in various ways, which improves the flexibility of sending the second indication information.

With reference to the first aspect, in some implementations of the first aspect, sending the second indication information to the receiving end device includes: sending the second indication information to the receiving end device when at least one of the following changes:

With reference to the first aspect, in some embodiments of the first aspect, the first sequence satisfies the following formula:

r(n)=Ae ^jαn x _q (n mod N _ZC ), n=0,1,2...L-1

Among them, r(n) is the nth element of the first sequence, A is a complex number independent of n, j is an imaginary unit, α is a real number independent of n, N _ZC is the largest prime number less than or equal to L or greater than L or the largest prime number less than or equal to 2L or the smallest prime number greater than 2L, q is an integer greater than 0 and less than N _ZC .

With reference to the first aspect, in some embodiments of the first aspect, the generation parameter of the first sequence indicates one or more of the following: α, N _ZC , or q.

In conjunction with the first aspect, in some implementations of the first aspect, the first sequence is generated by feedback-connected N-stage shift registers; the first sequence satisfies the following formula:

r(n+N)=(c _N r(n+N-1)+c _N-1 r(n+N-2)+...+c ₁ r(n)) mod2

Wherein, n=0,1,2...LN-1, c _i is the feedback coefficient of the i-th shift register, i=1,2,...N.

With reference to the first aspect, in some implementations of the first aspect, the generation parameters of the first sequence indicate one or more of the following: the number of stages N of shift registers, the feedback connection mode of N stages of shift registers, or N The initial state of the stage shift register.

r(n)=(x ₁ (n+N _c1 )+x ₂ (n+N _c2 ))mod2, n=0,1,2...L-1

Among them, r(n) is the nth element of the first sequence, x ₁ (n) and x ₂ (n) are m sequences, N _c1 is the shift value of x ₁ (n), N _c2 is x ₂ ( n) shift value.

In conjunction with the first aspect, in some implementations of the first aspect, the generation parameters of the first sequence indicate one or more of the following: the number of stages N1 of the shift register corresponding to x ₁ (n), and the shift register of the N1 stage The feedback connection mode of the N1-level shift register, the initial state of the N1-level shift register, the shift value N _c1 of x ₁ (n), the number of stages N2 of the shift register corresponding to x ₂ (n), and the feedback connection mode of the N2-level shift register , the initial state of the N2-stage shift register, or the shift value N _c2 of x ₂ (n).

In the second aspect, a method for sending a reference signal is provided. The method may be executed by a receiving device, or may be executed by a component of the receiving device, such as a processor, a chip, or a chip system of the receiving device, or may be It is realized by a logic module or software that can realize all or part of the functions of the receiver device. The method includes: acquiring the received signal of the reference signal on the first time unit group, and processing the received signal according to the second sequence. Wherein, the reference signal includes a second sequence determined according to the first sequence, and the second sequence includes

subsequence, the subsequence of the second sequence includes M elements, and the kth element in the l ^* th subsequence of the second sequence is the first sequence in the first sequence

elements,

k=0,...,M-1,

The second sequence is carried by the first time unit group consisting of

Based on this solution, this application splits the longer sequence into multiple time units, so that the split sequence can still be reassembled into a complete long sequence when it is processed at the receiving end, thus effectively increasing the length, which enhances the anti-interference ability of the sequence and reduces the interference between sequences sent by different devices. In addition, when the receiving end processes the received signal of the reference signal according to the second sequence, the correlation of the long sequence can be fully utilized, thereby improving the accuracy of distance measurement.

With reference to the second aspect, in some embodiments of the second aspect, the l ^* th time unit of the first time unit group also carries the first cyclic prefix corresponding to the l ^* th subsequence of the second sequence, and the second sequence's The first cyclic prefix corresponding to the l ^* th subsequence includes the last M1 elements of the l ^* th subsequence of the second sequence.

With reference to the second aspect, in some implementations of the second aspect, the starting time unit of the first time unit group also carries a second cyclic prefix, and the second cyclic prefix includes the last subsequence M1 of the second sequence elements, or in other words, the second cyclic prefix includes the last M1 elements of the second sequence.

With reference to the second aspect, in some embodiments of the second aspect, the first time unit group is included in the second time unit group, the second time unit group includes N _symb time units, and N _symb is greater than

The first time unit group consists of

time units are not consecutive within the second time unit group.

In conjunction with the second aspect, in some embodiments of the second aspect, the first time unit group is included in the second time unit group, the second time unit group includes N _symb time units, and N _symb is equal to

The first time unit group consists of

time units are consecutive within the second time unit group.

With reference to the second aspect, in some implementations of the second aspect, there is a mapping relationship between l ^* and l ^** , and the mapping relationship is that the l ^** th time unit of the second time unit group carries the lth time unit of the second sequence ^* subsequence.

With reference to the second aspect, in some implementation manners of the second aspect, the method further includes: receiving first indication information from the sending end device, where the first indication information is used to indicate the mapping relationship between l ^* and l ^** .

With reference to the second aspect, in some implementations of the second aspect, the method further includes: receiving second indication information from the sending end device, where the second indication information is used to indicate at least one of the following:

The number M of elements included in the subsequence of the second sequence, or the time domain position of the starting time unit in the first time unit group.

With reference to the second aspect, in some implementations of the second aspect, receiving the second indication information from the sender device includes: receiving radio resource control RRC signaling from the sender device, where the RRC signaling carries the second indication information ; Or, receiving downlink control information DCI from the sending end device, DCI carrying the second indication information; or receiving side link control information SCI from the sending end device, the SCI carrying the second indication information; or, receiving from the sending end device The RRC signaling and DCI of the device, the RRC signaling carries part of the second indication information, and the DCI carries another part of the second indication information; or, receiving the RRC signaling and SCI from the sending end device, the RRC signaling carrying the first Part of the second indication information, the SCI carries another part of the second indication information.

With reference to the second aspect, in some embodiments of the second aspect, the first sequence satisfies the following formula:

r(n)=Ae ^jαn x _q (n mod N _ZC ), n=0,1,2...L-1

With reference to the second aspect, in some embodiments of the second aspect, the generation parameter of the first sequence indicates one or more of the following: α, N _ZC , or q.

In conjunction with the second aspect, in some implementations of the second aspect, the first sequence is generated by feedback-connected N-stage shift registers; the first sequence satisfies the following formula:

r(n+N)=(c _N r(n+N-1)+c _N-1 r(n+N-2)+...+c ₁ r(n)) mod2

In conjunction with the second aspect, in some implementations of the second aspect, the generation parameters of the first sequence indicate one or more of the following: the number of stages N of shift registers, the feedback connection mode of N stages of shift registers, or N The initial state of the stage shift register.

r(n)=(x ₁ (n+N _c1 )+x ₂ (n+N _c2 ))mod2, n=0,1,2...L-1

In conjunction with the second aspect, in some implementations of the second aspect, the generation parameters of the first sequence indicate one or more of the following: the number of stages N1 of the shift register corresponding to x ₁ (n), and the shift register of the N1 stage The feedback connection mode of the N1-level shift register, the initial state of the N1-level shift register, the shift value N _c1 of x ₁ (n), the number of stages N2 of the shift register corresponding to x ₂ (n), and the feedback connection mode of the N2-level shift register , the initial state of the N2-stage shift register, or the shift value N _c2 of x ₂ (n).

Wherein, for the technical effects brought about by the implementation manners of the second aspect, reference may be made to the technical effects brought about by the corresponding implementation manners in the above-mentioned first aspect, which will not be repeated here.

In a third aspect, a communication device is provided for implementing the above various methods. The communication device may be the sending end device in the above first aspect, or a device including the above sending end device, or a device included in the above sending end device, such as a chip; or, the communication device may be the above second aspect A receiver device, or a device including the above-mentioned receiver device, or a device included in the above-mentioned receiver device. The communication device includes a corresponding module, unit, or means (means) for implementing the above method, and the module, unit, or means can be implemented by hardware, software, or by executing corresponding software by hardware. The hardware or software includes one or more modules or units corresponding to the above functions.

In some possible designs, the communication device may include a processing module. It may further include a transceiver module. The transceiver module, which may also be referred to as a transceiver unit, is configured to implement the sending and/or receiving functions in any of the above aspects and any possible implementation manners thereof. The transceiver module may be composed of a transceiver circuit, a transceiver, a transceiver or a communication interface. The processing module may be used to implement the processing functions in any of the above aspects and any possible implementation manners thereof.

In some possible designs, the transceiver module includes a sending module and a receiving module, respectively configured to implement the sending and receiving functions in any of the above aspects and any possible implementations thereof.

In a fourth aspect, a communication device is provided, including: a processor and a memory; the memory is used to store computer instructions, and when the processor executes the instructions, the communication device executes the method described in any aspect above. The communication device may be the sending end device in the above first aspect, or a device including the above sending end device, or a device included in the above sending end device, such as a chip; or, the communication device may be the above second aspect A receiver device, or a device including the above-mentioned receiver device, or a device included in the above-mentioned receiver device.

In a fifth aspect, a communication device is provided, including: a processor and a communication interface; the communication interface is used to communicate with modules other than the communication device; the processor is used to execute computer programs or instructions, so that the communication device Perform the method described in any one of the above aspects. The communication device may be the sending end device in the above first aspect, or a device including the above sending end device, or a device included in the above sending end device, such as a chip; or, the communication device may be the above second aspect A receiver device, or a device including the above-mentioned receiver device, or a device included in the above-mentioned receiver device.

In a sixth aspect, a communication device is provided, including: at least one processor; the processor is configured to execute a computer program or an instruction stored in a memory, so that the communication device executes the method described in any one of the above aspects. The memory can be coupled to the processor, or it can be independent of the processor. The communication device may be the sending end device in the above first aspect, or a device including the above sending end device, or a device included in the above sending end device, such as a chip; or, the communication device may be the above second aspect A receiver device, or a device including the above-mentioned receiver device, or a device included in the above-mentioned receiver device.

In a seventh aspect, a computer-readable storage medium is provided, and a computer program or instruction is stored in the computer-readable storage medium, and when it is run on a communication device, the communication device can execute the method described in any aspect above .

In an eighth aspect, there is provided a computer program product containing instructions, which, when run on a communication device, enables the communication device to execute the method described in any one of the above aspects.

A ninth aspect provides a communication device (for example, the communication device may be a chip or a chip system), and the communication device includes a processor configured to implement the functions involved in any one of the above aspects.

In some possible designs, the communication device includes a memory for storing necessary program instructions and data.

In some possible designs, when the device is a system-on-a-chip, it may consist of chips, or may include chips and other discrete devices.

It can be understood that when the communication device provided by any one of the third aspect to the ninth aspect is a chip, the above-mentioned sending action/function can be understood as output information, and the above-mentioned receiving action/function can be understood as input information.

Wherein, the technical effects brought about by any one of the design methods in the third aspect to the ninth aspect can refer to the technical effects brought about by the different design methods in the above-mentioned first aspect or the second aspect, and will not be repeated here.

In a tenth aspect, a communication system is provided, and the communication system includes the sending end device and the receiving end device described in the above aspect.

In an eleventh aspect, a communication device is provided, including a unit for performing the method described in any embodiment of the present application.

Description of drawings

FIG. 1 is a schematic flowchart of a sequence of sending and receiving processing provided by an embodiment of the present application;

FIG. 2 is a first schematic structural diagram of a communication system provided by an embodiment of the present application;

FIG. 3a is a schematic structural diagram II of a communication system provided by an embodiment of the present application;

FIG. 3b is a schematic structural diagram III of a communication system provided by an embodiment of the present application;

FIG. 3c is a fourth structural schematic diagram of a communication system provided by an embodiment of the present application;

Fig. 3d is a schematic structural diagram five of a communication system provided by an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

FIG. 5 is a schematic flowchart of a method for sending and receiving a reference signal provided in an embodiment of the present application;

Fig. 6a is a first schematic diagram of a sequence carried on a symbol group provided by an embodiment of the present application;

Fig. 6b is a second schematic diagram of a sequence carried on a symbol group provided by the embodiment of the present application;

Fig. 7a is a third schematic diagram of a sequence carried on a symbol group provided by the embodiment of the present application;

Fig. 7b is a schematic diagram 4 of a sequence carried on a symbol group provided by the embodiment of the present application;

Fig. 8 is a schematic diagram 5 of a sequence carried on a symbol group provided by the embodiment of the present application;

Fig. 9a is a sixth schematic diagram of a sequence carried on a symbol group provided by the embodiment of the present application;

Fig. 9b is a schematic diagram of a sequence carried on a symbol group provided by the embodiment of the present application VII;

Fig. 10a is a schematic diagram eighth of a sequence carried on a symbol group provided by the embodiment of the present application;

Fig. 10b is a schematic diagram of a sequence carried on a symbol group provided by the embodiment of the present application ninth;

Fig. 11a is a schematic flow diagram of a sequence of sending and receiving processing provided by the embodiment of the present application;

Figure 11b is a schematic flow diagram of a sequence of sending and receiving processing provided by the embodiment of the present application II

FIG. 12 is a schematic flow diagram of a sequence of sending and receiving processing provided by the embodiment of the present application III;

FIG. 13 is a schematic flow diagram 4 of a sequence of sending and receiving processing provided by the embodiment of the present application;

FIG. 14 is a schematic structural diagram of a sending end device provided by an embodiment of the present application;

FIG. 15 is a schematic structural diagram of a receiver device provided in an embodiment of the present application;

FIG. 16 is a schematic structural diagram of a communication device provided by an embodiment of the present application.

Detailed ways

In the description of this application, unless otherwise specified, "/" means that the objects associated with each other are an "or" relationship, for example, A/B can mean A or B; "and/or" in this application is only It is an association relationship describing associated objects, which means that there can be three kinds of relationships, for example, A and/or B, which can mean: A exists alone, A and B exist at the same time, and B exists alone, among which A, B Can be singular or plural.

In the description of the present application, unless otherwise specified, "plurality" means two or more than two. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one item (piece) of a, b, or c can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, c can be single or multiple .

In addition, in order to clearly describe the technical solutions of the embodiments of the present application, in the embodiments of the present application, words such as "first" and "second" are used to distinguish the same or similar items with basically the same function and effect. Those skilled in the art can understand that words such as "first" and "second" do not limit the number and execution order, and words such as "first" and "second" do not necessarily limit the difference. At the same time, in the embodiments of the present application, words such as "exemplary" or "for example" are used as examples, illustrations or descriptions. Any embodiment or design scheme described as "exemplary" or "for example" in the embodiments of the present application shall not be interpreted as being more preferred or more advantageous than other embodiments or design schemes. To be precise, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete manner for easy understanding.

It is to be understood that references to "an embodiment" throughout the specification mean that a particular feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present application. Therefore, various embodiments are not necessarily referring to the same embodiment throughout the specification. Furthermore, the particular features, structures or characteristics may be combined in any suitable manner in one or more embodiments. It can be understood that in various embodiments of the present application, the serial numbers of the processes do not mean the order of execution, and the execution order of the processes should be determined by their functions and internal logic, and should not be used in the embodiments of the present application. The implementation process constitutes no limitation.

It can be understood that in this application, "...when" and "if" both refer to the corresponding processing under certain objective circumstances, and are not time-limited, nor do they require judgment actions during implementation, nor do they imply that other limitations exist.

It can be understood that pre-defined in this application can be understood as definition, pre-definition, storage, pre-storage, pre-negotiation, pre-configuration, curing, or pre-firing.

It can be understood that some optional features in the embodiments of the present application, in some scenarios, can be independently implemented without relying on other features, such as the current solution on which they are based, to solve corresponding technical problems and achieve corresponding effects , and can also be combined with other features according to requirements in some scenarios. Correspondingly, the devices provided in the embodiments of the present application can also correspondingly implement these features or functions, which will not be repeated here.

In this application, unless otherwise specified, the parts that are the same or similar among the various embodiments can be referred to each other. In the various embodiments in this application, and the various implementation methods/implementation methods/implementation methods in each embodiment, if there is no special description and logical conflict, different embodiments, and each implementation method/implementation method in each embodiment The terms and/or descriptions between implementation methods/implementation methods are consistent and can be referred to each other. Different embodiments, and the technical features in each implementation manner/implementation method/implementation method in each embodiment are based on their inherent Logical relationships can be combined to form new embodiments, implementation modes, implementation methods, or implementation methods. The following embodiments of the present application are not intended to limit the protection scope of the present application.

At present, the measurement of the distance between devices can be realized through the transmission of sequences. Usually, the sending end device sends a sequence in one symbol, that is, the length of the sequence is limited to the total number of data points in one symbol, or in other words, the number of elements included in the sequence does not exceed the total number of data points in one symbol. Wherein, the symbol may be, for example, an orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbol or a single-carrier frequency-division multiple access (single-carrier frequency-division multiple access, SC-FDMA) symbol. The time domain location of the data point within the symbol is used to carry the data. In addition, the symbol may also include a cyclic prefix point, and the time domain position where the cyclic prefix point is located is used to bear the cyclic prefix. Data points and cyclic prefix points may be collectively referred to as sample points.

Exemplarily, taking the number of data points in a symbol as 5 and the number of cyclic prefix points as 2 as an example, as shown in Figure 1, the sending end device sends a sequence S including 5 elements in each of the three symbols, where , the elements of the sequence S are respectively denoted as S(1), S(2), S(3), S(4), and S(5). The cyclic prefix within each symbol consists of the last two elements of sequence S, S(4) and S(5).

At the receiving end, the receiving end device can receive the received sequence including the cyclic prefix and the sequence S, and truncate the received sequence in each symbol to obtain the sorted sequence, and then the sorted sequence and the local sequence in each According to the result of the circular correlation operation, the distance between the receiving end device and the sending end device is obtained. Wherein, the local sequence is the same as the sequence S sent by the sender device.

Exemplarily, it is assumed that the number of elements of the cyclic prefix intercepted by the receiving end device in each symbol and the number of elements of the sequence S are equal, as shown in Figure 1, taking the intercepted cyclic prefix including 1 element as an example, each The sorted sequences corresponding to the symbols are S(5), S(1), S(2), S(3), and S(4).

However, as described in the background, in a scenario with many devices, sequences sent by different devices may interfere with each other. In the case where the length of the sequence is limited to the number of data points in one symbol, the length of the sequence is short and the anti-interference ability is limited.

Based on this, the present application provides a method for sending and receiving a reference signal, which can enhance the anti-interference capability and reduce the interference between sequences sent by different devices, thereby improving the accuracy of distance measurement.

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

The technical solution of the embodiment of the present application can be used in various communication systems, and the communication system can be a third generation partnership project (3rd generation partnership project, 3GPP) communication system, for example, a long term evolution (long term evolution, LTE) system, or The fifth generation (5th generation, 5G) mobile communication system, vehicle to everything (V2X) system, or LTE and 5G hybrid networking system, or device-to-device (D2D) communication system, Machine to machine (M2M) communication systems, Internet of things (IoT), and other next-generation communication systems. The communication system may also be a non-3GPP communication system without limitation.

The technical solution of the embodiment of the present application can be applied to various communication scenarios, for example, it can be applied to one or more of the following communication scenarios: enhanced mobile broadband (enhanced mobile broadband, eMBB), ultra-reliable low-latency communication (ultra- Reliable low latency communication (URLLC), machine type communication (machine type communication, MTC), large-scale machine type communication (massive machine type communication, mMTC), D2D, V2X, and IoT and other communication scenarios.

Wherein, the above-mentioned communication systems and communication scenarios applicable to the present application are only examples, and the communication systems and communication scenarios applicable to the present application are not limited thereto, and will be described in a unified manner here, and will not be described in detail below.

As a possible implementation, the present application provides a communication system applicable to the present application. As shown in FIG. 2 , the communication system may include a sending end device 201 and a receiving end device 202 .

Optionally, the sending-end device 201 and the receiving-end device 202 may both be terminal devices or chips or chip systems therein. Alternatively, the sending end device 201 may be a network device or a chip or a chip system therein, and the receiving end device 202 may be a terminal device or a chip or a chip system therein.

Optionally, the terminal device may be a device for implementing a communication function. Terminal equipment may also be called user equipment (user equipment, UE), terminal, access terminal, subscriber unit, subscriber station, mobile station (mobile station, MS), remote station, remote terminal, mobile terminal (mobile terminal, MT) , user terminal, wireless communication device, user agent or user device, etc. The terminal device may be, for example, an IoT, V2X, D2D, M2M, 5G network, or a wireless terminal in a future evolved public land mobile network (public land mobile network, PLMN). A wireless terminal can refer to a device with wireless transceiver functions, which can be deployed on land, including indoor or outdoor, hand-held or vehicle-mounted; it can also be deployed on water (such as ships, etc.); it can also be deployed in the air (such as aircraft, balloons and satellites, etc.).

Exemplarily, the terminal device may be a drone, an IoT device (for example, a sensor, an electric meter, a water meter, etc.), a V2X device, a station (station, ST) in a wireless local area network (wireless local area networks, WLAN), a cell phone, Cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistant (PDA) devices, handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices (also called wearable smart devices), tablet computers or computers with wireless transceiver functions, virtual reality (virtual reality, VR) terminals, industrial control ( Wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical, wireless terminals in smart grid, transportation safety Wireless terminals in smart cities, wireless terminals in smart homes, vehicle-mounted terminals, vehicles with vehicle-to-vehicle (V2V) communication capabilities, intelligent network Vehicles, UAVs with UAV to UAV (UAV to UAV, U2U) communication capabilities, etc.

Optionally, the network device is a device for connecting the terminal device to the wireless network, and may be an evolved base station (evolutional Node B, eNB or eNodeB) in LTE or an evolved LTE system (LTE-Advanced, LTE-A). ), such as a traditional macro base station eNB and a micro base station eNB in a heterogeneous network scenario; or it can be a next generation node B (next generation node B, gNodeB or gNB) in a 5G system; or it can be a transmission reception point (transmission reception point, TRP); or it may be a base station in a future evolved PLMN, which is not specifically limited in this embodiment of the present application.

Optionally, the sending-end device 201 and the receiving-end device 202 may be the same device. In this scenario, after the sending signal of the sending end device 201 is transmitted by the electromagnetic reflector, the sending end device 201 may receive the reflected signal of the sending signal. At this time, the transmitting end device may determine the distance between the transmitting end device and the electromagnetic reflector based on the received reflection signal.

Exemplarily, as shown in FIG. 3a, taking the smart speaker as an example in the whole-house smart scene, the sending device 201 is an example. After the sending signal of the smart speaker is reflected by an electromagnetic reflector, the smart speaker receives the reflected signal of the sending signal .

Optionally, the sending-end device 201 and the receiving-end device 202 may be different devices. Exemplarily, as shown in FIG. 3 b , one of the sending-end device 201 and the receiving-end device 202 may be a smart speaker, and the other may be a smart TV. Alternatively, as shown in FIG. 3 c , both the sending-end device 201 and the receiving-end device 202 may be vehicle-mounted devices. Alternatively, as shown in FIG. 3 d , the transmitting device 201 may be a network device, and the receiving device 202 may be a vehicle device or a handheld device.

The relevant functions of the sending end device or the receiving end device involved in this application can be realized by one device, can also be realized by multiple devices, can also be realized by one or more functional modules in one device, or can be one or more The plurality of chips may also be a system on chip (system on chip, SOC) or a chip system, and the chip system may be composed of chips, or may include chips and other discrete devices, which are not specifically limited in this embodiment of the present application.

It can be understood that the above functions can be network elements in hardware devices, software functions running on dedicated hardware, or a combination of hardware and software, or instantiated on a platform (for example, a cloud platform) Virtualization capabilities.

For example, related functions of the sending end device or the receiving end device involved in the present application may be implemented by the communication device 400 in FIG. 4 . FIG. 4 is a schematic structural diagram of a communication device 400 provided by an embodiment of the present application. The communication device 400 includes one or more processors 401, communication lines 402, and at least one communication interface (in FIG. 4, it is only exemplary to include a communication interface 404 and a processor 401 for illustration), optional Yes, a memory 403 may also be included.

The processor 401 can be a general-purpose central processing unit (central processing unit, CPU), a microprocessor, a specific application integrated circuit (application-specific integrated circuit, ASIC), or one or more for controlling the implementation of the application program program integrated circuit.

The communication line 402 may be used for communication between different components included in the communication device 400 .

The communication interface 404 can be a transceiver module for communicating with other devices or communication networks, such as Ethernet, wireless access networks (wireless access networks, RAN), wireless local area networks (wireless local area networks, WLAN) and the like. For example, the transceiving module may be a device such as a transceiver or a transceiver. Optionally, the communication interface 404 may also be a transceiver circuit located in the processor 401 to realize signal input and signal output of the processor.

The storage 403 may be a device having a storage function. For example, it can be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (random access memory, RAM) or other types of memory that can store information and instructions A dynamic storage device can also be an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage ( including compact discs, laser discs, optical discs, digital versatile discs, blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program code in the form of instructions or data structures and can be stored by a computer Any other medium, but not limited to. The memory may exist independently and be connected to the processor through the communication line 402 . Memory can also be integrated with the processor.

Wherein, the memory 403 is used to store computer-executed instructions for implementing the solution of the present application, and the execution is controlled by the processor 401 . The processor 401 is configured to execute computer-executed instructions stored in the memory 403, so as to implement the methods provided in the embodiments of the present application.

Or, optionally, in this embodiment of the application, the processor 401 may also perform processing-related functions in the methods provided in the following embodiments of the application, and the communication interface 404 is responsible for communicating with other devices or communication networks. The example does not specifically limit this.

Optionally, the computer-executed instructions in the embodiments of the present application may also be referred to as application program codes, which is not specifically limited in the embodiments of the present application.

In a specific implementation, as an embodiment, the processor 401 may include one or more CPUs, for example, CPU0 and CPU1 in FIG. 4 .

In a specific implementation, as an embodiment, the communication device 400 may include multiple processors, for example, the processor 401 and the processor 408 in FIG. 4 . Each of these processors may be a single-core processor or a multi-core processor. The processor here may include but not limited to at least one of the following: central processing unit (central processing unit, CPU), microprocessor, digital signal processor (DSP), microcontroller (microcontroller unit, MCU), or artificial intelligence Various types of computing devices that run software such as processors, each computing device may include one or more cores for executing software instructions to perform calculations or processing.

In a specific implementation, as an embodiment, the communication apparatus 400 may further include an output device 405 and an input device 406 . Output device 405 is in communication with processor 401 and may display information in a variety of ways. For example, the output device 405 may be a liquid crystal display (liquid crystal display, LCD), a light emitting diode (light emitting diode, LED) display device, a cathode ray tube (cathode ray tube, CRT) display device, or a projector (projector), etc. The input device 406 communicates with the processor 401 and can receive user input in various ways. For example, the input device 406 may be a mouse, a keyboard, a touch screen device, or a sensing device, among others.

It should be noted that the composition structure shown in FIG. 4 does not constitute a limitation to the communication device. Except for the components shown in FIG. certain components, or a different arrangement of components. The illustrated components can be realized in hardware, software or a combination of software and hardware.

The following will describe the method provided by the embodiment of the present application by taking the interaction between the sending end device and the receiving end device shown in FIG. 2 as an example with reference to the accompanying drawings.

It can be understood that in the embodiments of the present application, the executive body may perform some or all of the steps in the embodiments of the present application, these steps or operations are only examples, and the embodiments of the present application may also perform other operations or variations of various operations. In addition, each step may be performed in a different order presented in the embodiment of the present application, and it may not be necessary to perform all operations in the embodiment of the present application.

It should be noted that in the following embodiments of this application, the name of the message between the sending end device and the receiving end device or the name of each parameter in the message is just an example, and other names may also be used in the specific implementation. This is not specifically limited.

As shown in Figure 5, a method for sending and receiving a reference signal provided in the embodiment of the present application, the method includes the following steps:

S501. The device at the sending end determines a first sequence. Wherein, the length of the first sequence is L.

Optionally, the length of the first sequence may refer to the number of elements included in the first sequence. The length L of the first sequence may be greater than the maximum sequence length corresponding to one time unit. The maximum sequence length corresponding to a time unit can be the number of data points in the time unit.

Optionally, a time unit in this application may be a symbol, a time slot, a subframe, a frame, etc., and a symbol may be, for example, an SC-FDMA symbol or an OFDM symbol. In the following embodiments of the present application, the time unit is used as an example for illustration.

Optionally, the value of the length L of the first sequence may be stored, or pre-stored, or pre-configured, or solidified, or pre-fired in the sending end device. Alternatively, it may be determined by the sending end device. Alternatively, it may be stipulated in an agreement, which is not specifically limited in this application.

S502. The device at the sending end determines a second sequence according to the first sequence.

Wherein, the second sequence includes

subsequences, the subsequences of the second sequence include M elements,

Exemplarily, M may be equal to or less than the number of data points in one time unit. When the value of the length L of the first sequence and the value of M are known, it can be determined

value of .

Optionally, the determining of the second sequence by the sending-end device according to the first sequence may include: the sending-end device rearranges elements of the first sequence to obtain the second sequence. Exemplarily, the positions of the elements in the second sequence in the first sequence can be implemented in the following two ways:

Method 1. The kth element in the l ^* th subsequence of the second sequence is the element in the first sequence

elements,

k=0,...,M-1. in,

Indicates that l ^* is 0 to

is a positive integer, k=0,...,M-1 means that k is an integer from 0 to M-1.

Exemplarily, taking the first sequence as R and the second sequence as S as an example, in the first method, the position of the elements in the second sequence in the first sequence can be expressed as the following formula (1):

in,

Represents the kth element in the l ^* th subsequence of the second sequence.

Indicates the first sequence in the

elements.

Exemplarily, with L equal to 15 and M equal to 5,

Equal to 3 as an example, the position of the elements in the second sequence in the first sequence can be shown in Table 1 below.

Table 1

From the above, in the first method, in the subsequence of the second sequence, the index difference between any two adjacent elements in the first sequence is equal to

Method 2. The kth element in the l ^* th subsequence of the second sequence is the first sequence

elements,

k=0,...,M-1.

Exemplarily, taking the first sequence as R and the second sequence as S as an example, in the second method, the position of the elements in the second sequence in the first sequence can be expressed as the following formula (2):

in,

Represents the kth element in the l ^* th subsequence of the second sequence.

Indicates the first sequence in the

elements.

Exemplarily, with L equal to 15 and M equal to 5,

Equal to 3 as an example, the position of the elements in the second sequence in the first sequence can be as shown in Table 2 below.

Table 2

It can be obtained from the above that in the second method, in the subsequence of the second sequence, the index difference between any two adjacent elements in the first sequence is equal to 1.

S503. The device at the sending end sends the second sequence.

Wherein, the second sequence is carried by the first time unit group. The first time cell group includes

time units, and the l ^* th time unit in the first time unit group carries the l ^* th subsequence of the second sequence. That is, the second sequence is sent on the first time unit group, and one time unit in the first time unit group carries a subsequence of the second sequence. Exemplarily, when the time unit is a symbol, the first time unit group includes

symbols.

Optionally, the sending the second sequence by the sending end device may include: sending a reference signal by the sending end device, where the reference signal includes the second sequence.

S504. The device at the receiving end acquires a received signal of the reference signal on the first time unit group.

Wherein, the reference signal includes a second sequence determined according to the first sequence. For the second sequence, reference may be made to relevant descriptions in the above step S502, which will not be repeated here.

Optionally, the received signal of the reference signal may be a signal received by the device at the receiving end after the reference signal is transmitted through the channel. Exemplarily, in the case that the receiving-end device and the sending-end device are the same device, the received signal of the reference signal may be a reflected signal of the reference signal sent by the sending-end device.

S505. The device at the receiving end processes the received signal according to the second sequence.

Optionally, the receiving device can obtain the distance between the receiving device and the target object by processing the received signal. Exemplarily, when the receiving end device and the sending end device are the same device, the target object may be an electromagnetic reflector; when the receiving end device and the sending end device are different devices, the target object is the sending end device .

Above, the overall flow of the method for sending and receiving the reference signal provided by the present application has been described. The specific implementation of each step in the above process will be described below.

For the first sequence:

As a possible implementation manner, the first sequence may satisfy the following formula (4), and the sending end device may generate the first sequence according to the following formula (4).

r(n)=Ae ^jαn x _q (n mod N _ZC ), n=0,1,2...L-1 (4)

Optionally, when the first sequence satisfies the foregoing formula (4), the first sequence may be called a Zadoff-chu sequence, or a ZC sequence for short. Of course, there may also be other names, which are not specifically limited in this application.

As another possible implementation manner, the first sequence may be generated through N-stage shift registers connected by feedback. The feedback connection mode of the N-stage shift register can be expressed as the following formula (5):

F(x)＝c _N x ^N +c _N-1 x ^N-1 +...+c ₁ x ¹ +c ₀ (5)

Among them, F(x) is the feedback connection mode of the N-stage shift register. ci is the feedback coefficient of the _i -th shift register _. The value of ci is 1 or 0. When _ci takes 0, it means no feedback, that is, the feedback line of the _i -th shift register is disconnected. When ci takes When it is 1, it means that there is feedback, that is, the feedback line of the i-th shift register is not disconnected. x ⁱ is the output of the i-th shift register. Wherein, i=1, 2, . . . N indicates that i is a positive integer ranging from 1 to N. c ₀ is equal to 1.

Optionally, in this implementation, the first sequence may satisfy the following formula (6), and the sending end device may generate the first sequence according to the following formula (6):

r(n+N)=(c _N r(n+N-1)+c _N-1 r(n+N-2)+...+c ₁ r(n))mod2 (6)

Wherein, n=0, 1, 2...L-N-1, indicating that n is an integer from 0 to L-N-1. When n is an integer from 0 to N-1, r(0) to r(N-1) are the 0th to N-1th elements of the first sequence, for example, r(0) to r( N-1) may be the initial state of the 0th shift register to the N-1th register. The Nth element to the L-N-1th element of the first sequence are calculated according to the above formula (6).

Optionally, when the first sequence satisfies the foregoing formula (6), the first sequence may be called an m-sequence. Of course, there may also be other names, which are not specifically limited in this application.

As yet another possible implementation manner, the first sequence may satisfy the following formula (7), and the sending end device may generate the first sequence according to the following formula (7).

r(n)=(x ₁ (n+N _c1 )+x ₂ (n+N _c2 ))mod2, n=0,1,2...L-1 (7)

Optionally, when the first sequence satisfies the foregoing formula (7), the first sequence may be called a Gold sequence. Of course, there may also be other names, which are not specifically limited in this application.

When the position of the elements in the second sequence in the first sequence satisfies the first method in step S502, for step S503:

Optionally, in addition to carrying the l ^{*th subsequence of the second sequence, the l*} ^th time unit in the first time unit group may also carry the first cyclic prefix corresponding to the l ^* th subsequence of the second sequence. The first cyclic prefix corresponding to the l ^* th subsequence of the second sequence includes the last M1 elements of the l ^* th subsequence of the second sequence. Exemplarily, M1 may be equal to or less than the maximum number of elements that can be included in the cyclic prefix carried by one time unit.

Exemplarily, with L equal to 15 and M equal to 5,

is equal to 3 and M1 is equal to 2 as an example, the elements carried on each time unit in the first time unit group can be shown in Table 3 below:

table 3

Optionally, the first time unit group may be included in the second time unit group, and the second time unit group includes N _symb time units. Both the start time unit and the end time unit in the second time unit group carry the subsequence of the second sequence, that is, the first time unit group includes the start time unit and the end time unit in the second time unit group. Of course, the first time unit group may also include other time units in the second time unit group.

It should be noted that in this application, the start time unit refers to the time unit with the earliest time domain position in the time unit group, and the end time unit indicates the time unit with the latest time domain position in the time unit group. Therefore, when the first time unit group includes the start time unit in the second time unit group, the time domain positions of the start time unit in the first time unit group and the start time unit in the second time unit group are the same.

Optionally, if the index of the time unit in the second time unit group is l ^** , and the index in the first time unit group is l ^* , since the first time unit group is included in the second time unit group, therefore There is a mapping relationship between l ^* and l ^** . The mapping relationship carries the l ^* th subsequence of the second sequence for the l ^** th time unit of the second time unit group. That is, the l ^* th time unit in the first time unit group carries the l ^* th subsequence of the second sequence, which can be understood as: the l ^** th time unit of the second time unit group carries the second sequence The l ^* th subsequence of .

Optionally, N _symb can be greater than

That is, the first time unit group includes some time units in the second time unit group. In this scenario, the first time unit group includes

time units may not be consecutive within the second time unit group.

Exemplarily, the second time unit group includes 4 time units, the indexes l ^** of the 4 time units are 0, 1, 2, 3 respectively, and the first time unit group includes 3 in the second time unit group time units, and the index l ^** of the time units included in the first time unit group in the second time unit group is 0, 2, and 3 respectively as an example, since the time units included in the first time unit group are in the first time unit The indices l ^* in the cell group are 0, 1, 2 respectively, such that l ^** =0 corresponds to l ^* =0, l ^** =2 corresponds to l ^* =1, l ^** =3 corresponds to l ^* =2. Based on the elements shown in Table 3, taking the time unit as an example, the position of the first symbol group in the second symbol group and the elements carried on the first symbol group in this example can be shown in Figure 6a. That is to say, the time units in the second time unit group can carry the subsequences of the second sequence in the order of the time units, for example, the subsequence carried by the previous time unit is located before the subsequence carried by the subsequent time unit .

It can be understood that the corresponding relationship between l ^* and l ^** is not limited to the corresponding relationship shown in Fig. 6a, and there may be other corresponding relationships. For example, l ^** = 0 corresponds to l ^* = 0, l ^** = 2 corresponds to l ^* = 2, l ^** = 3 corresponds to l ^* = 1, at this time, taking the time unit as an example, the following example The position of a symbol group in the second symbol group and the elements carried on the first symbol group may be shown in FIG. 6b. Or l ^** =0 corresponds to l ^* =1, l ^** =1 corresponds to l ^* =0, l ^** =3 corresponds to l ^* =2; or, l ^** =0 corresponds to l ^* =1, l ^** =1 corresponds to l ^* =2, l ^** =3 corresponds to l ^* =0, without limitation. That is to say, the time units in the second time unit group may not carry the subsequences of the second sequence in the order of the time units, for example, the previous time units may carry the later subsequences in the second sequence, and the later The time unit of can carry the first subsequence in the second sequence.

Based on the above scheme, the N _symb is greater than

When , the sender device sends the second sequence on some time units in the second time unit group, so that data can be sent on another part of the time unit in the second time unit group, so as to achieve a balance between data transmission and sequence transmission , so as to reduce the data transmission waiting delay and improve the flexibility of sequence transmission.

Optionally, N _symb can be equal to

That is, the first time unit group includes all time units in the second time unit group. In this scenario, the N _symb time units included in the first time unit group are continuous in the second time unit group. In other words, the N _symb time units included in the first time unit group are continuous in the time domain.

Exemplarily, the second time unit group includes 3 time units, the indices l ^** of the 3 time units are 0, 1, and 2 respectively, and the first time unit group includes all time units in the second time unit group For example, since the indices l ^* of the time units included in the first time unit group in the first time unit group are 0, 1, and 2 respectively, l ^** = 0 corresponds to l ^* = 0, and l ^** = 1 corresponds to l ^* =1, l ^** =2 corresponds to l ^* =2. Based on the elements shown in Table 3, taking the time unit as an example, the position of the first symbol group in the second symbol group and the elements carried on the first symbol group in this example can be shown in FIG. 7a.

It can be understood that the corresponding relationship between l ^* and l ^** is not limited to the corresponding relationship shown in FIG. 7 a , and there may be other corresponding relationships. For example, l ^** = 0 corresponds to l ^* = 0, l ^** = 1 corresponds to l ^* = 2, l ^** = 2 corresponds to l ^* = 1, at this time, taking the time unit as an example, the following example The position of a symbol group in the second symbol group and the elements carried on the first symbol group may be shown in FIG. 7b. Of course, there may be other corresponding relationships between l ^* and l ^** , which are not limited.

Optionally, the above correspondence between l ^* and l ^** may be stored, or pre-stored, or pre-configured, or solidified, or pre-fired in the sending end device. Or, it may be determined by the device at the sending end, which is not specifically limited in this application.

When the position of the elements in the second sequence in the first sequence satisfies the second method in step S502, for step S503:

As a possible implementation, the starting time unit of the first time unit group also carries a second cyclic prefix, and the second cyclic prefix includes the last M1 elements of the last subsequence of the second sequence, or in other words, the second The cyclic prefix includes the last M1 elements of the second sequence.

It should be noted that, in this possible implementation, only the first time unit of the first time unit group carries the second cyclic prefix, and the rest of the time units do not carry the cyclic prefix, that is, this possible implementation only involves one second cyclic prefix prefix.

Exemplarily, with L equal to 15 and M equal to 5,

is equal to 3 and M1 is equal to 2 as an example, the elements carried on each time unit in the first time unit group can be shown in Table 4 below:

Table 4

Optionally, in this scenario, the time units included in the first time unit group are continuous in the time domain. Exemplarily, based on the elements shown in Table 4, taking the time unit as an example, the elements carried on the first symbol group may be as shown in FIG. 8 .

Based on this solution, the second cyclic prefix is carried on the starting time unit of the first time unit group, and the cyclic prefix is not sent on other time units, thereby reducing resource overhead.

As another possible implementation, in addition to carrying the l ^{*th subsequence of the second sequence, the l*} ^th time unit in the first time unit group can also ^carry the first cyclic prefix. It can be referred to that when the position of the elements in the second sequence in the first sequence satisfies the first method in step S502, the relevant description of step S503 will not be repeated here.

Exemplarily, with L equal to 15 and M equal to 5,

is equal to 3 and M1 is equal to 2 as an example, the elements carried on each time unit in the first time unit group can be shown in Table 5 below:

table 5

Optionally, the first time unit group may be included in the second time unit group, and the second time unit group includes N _symb time units. If the index of the time unit in the second time unit group is l ^** , and the index in the first time unit group is l ^* , since the first time unit group is included in the second time unit group, l ^* and l ^** There is a mapping relationship between them. It can be referred to that when the position of the elements in the second sequence in the first sequence satisfies the first method in step S502, the relevant description of step S503 will not be repeated here.

Optionally, N _symb can be greater than

That is, the first time unit group includes some time units in the second time unit group. It can be referred to that when the position of the elements in the second sequence in the first sequence satisfies the first method in step S502, the relevant description of step S503 will not be repeated here.

Exemplarily, the second time unit group includes 4 time units, the indexes l ^** of the 4 time units are 0, 1, 2, 3 respectively, and the first time unit group includes 3 in the second time unit group time units, and the index l ^** of the time units included in the first time unit group in the second time unit group is 0, 2, and 3 respectively as an example, since the time units included in the first time unit group are in the first time unit The indices l ^* in the cell group are 0, 1, 2 respectively, such that l ^** =0 corresponds to l ^* =0, l ^** =2 corresponds to l ^* =1, l ^** =3 corresponds to l ^* =2. Based on the elements shown in Table 5, taking the time unit as an example, the position of the first symbol group in the second symbol group and the elements carried on the first symbol group in this example can be shown in FIG. 9a.

It can be understood that the corresponding relationship between l ^* and l ^** is not limited to the corresponding relationship shown in Fig. 9a, and there may be other corresponding relationships. For example, l ^** = 0 corresponds to l ^* = 0, l ^** = 2 corresponds to l ^* = 2, l ^** = 3 corresponds to l ^* = 1, at this time, taking the time unit as an example, the following example The position of a symbol group in the second symbol group and the elements carried on the first symbol group may be as shown in FIG. 9b. Of course, there may be other corresponding relationships between l ^* and l ^** , which are not limited.

Optionally, N _symb can be equal to

That is, the first time unit group includes all time units in the second time unit group. It can be referred to that when the position of the elements in the second sequence in the first sequence satisfies the first method in step S502, the relevant description of step S503 will not be repeated here.

Exemplarily, the second time unit group includes 3 time units, the indices l ^** of the 3 time units are 0, 1, and 2 respectively, and the first time unit group includes all time units in the second time unit group For example, since the indices l ^* of the time units included in the first time unit group in the first time unit group are 0, 1, and 2 respectively, l ^** = 0 corresponds to l ^* = 0, and l ^** = 1 corresponds to l ^* =1, l ^** =2 corresponds to l ^* =2. Based on the elements shown in Table 5, taking the time unit as an example, the position of the first symbol group in the second symbol group and the elements carried on the first symbol group in this example can be shown in Figure 10a.

It can be understood that the correspondence between l ^* and l ^** is not limited to the correspondence shown in FIG. 10 a , and there may be other correspondences. For example, l ^** = 0 corresponds to l ^* = 0, l ^** = 1 corresponds to l ^* = 2, l ^** = 2 corresponds to l ^* = 1, at this time, taking the time unit as an example, the following example The position of a symbol group in the second symbol group and the elements carried on the first symbol group may be as shown in FIG. 10b. Of course, there may be other corresponding relationships between l ^* and l ^** , which are not limited.

Optionally, the method of obtaining the correspondence between l ^* and l ^** above can refer to the relevant description of step S503 when the position of the elements in the second sequence in the first sequence satisfies the first method in step S502 above, I won't go into details here.

Optionally, based on the description of the above step S503, the mapping relationship between l ^* and l ^** can also be understood as the mapping relationship between the subsequence of the second sequence and the time unit in the second time unit group, that is, the second time The l ^** th time unit in the unit group carries the l ^{*th subsequence of the second sequence, or the l*} ^th subsequence of the second sequence is mapped to the l ^** th time unit in the second time unit group . Exemplarily, based on the example shown in FIG. 10b, the mapping order of the second sequence is the 0th symbol→the 2nd symbol→the 1st symbol in the second time unit group.

For step S504:

Optionally, in the case that the l ^* th time unit of the first time unit also carries the first cyclic prefix corresponding to the l ^* th subsequence of the second sequence, the received signal of the reference signal acquired by the receiver device may include

sub signal. Wherein, the l ^* th sub-signal may include the l ^* th subsequence of the second sequence and its corresponding first cyclic prefix, and the l ^* th sub-signal is carried by the l ^* th time unit in the first time unit group.

Optionally, in the case that the start time unit of the first time unit carries the second cyclic prefix, the received signal of the reference signal acquired by the receiving end may include the second sequence and the second cyclic prefix.

In step S504, when the sub-signal of the received signal of the reference signal obtained by the receiving end device includes the sub-sequence of the second sequence and its corresponding first cyclic prefix, the above step S505 may include the following steps:

S5051. Intercept the l ^* th sub-signal of the received signal to obtain the l ^* th subsequence of the third sequence. Wherein, the l ^* th subsequence of the third sequence includes M elements.

Optionally, the device at the receiving end can determine the interception position corresponding to the l ^* th sub-signal of the received signal according to preset rules; and then according to the interception position corresponding to the l ^* ^th sub-signal of the received signal, the The sequence is intercepted to obtain the l ^* th subsequence of the third sequence.

Optionally, when the receiving end device and the sending end device are different devices, and the sending end device and the receiving end device have been synchronized, the preset rule may indicate that the initial interception position of the initial sub-signal of the received signal and The interval between the starting positions of the starting time units in the first time unit group is timing advanced (time advanced, TA), the intercepting time length of the starting sub-signal is M*T _s , and T _s is an adjacent sampling point time interval between.

Optionally, in the case that the receiving-end device and the sending-end device are different devices, the sending-end device may indicate to the receiving-end device the time domain position of the starting time unit in the first time unit group, so that the receiving-end device can determine to obtain the above-mentioned The initial time-domain position of the received signal is used to determine the initial interception position of the initial sub-signal.

Optionally, when the device at the receiving end and the device at the sending end are the same device, the preset rule may indicate that the initial interception position of the initial sub-signal of the received signal is the same as the initial time unit in the first time unit group The interval between the starting positions is M1*T _s /2, M1*T _s is the time domain length occupied by the first cyclic prefix, and the intercepting time length of the starting sub-signal is M*T _s .

Optionally, regardless of whether the receiver device and the sender device are the same device, if the time units included in the first time unit group are consecutive in the second time unit group, the preset rule may also indicate that the latter sub-signal The interval between the initial interception position of the first sub-signal and the termination interception position of the previous sub-signal is M1*T _s , or in other words, the interval between the initial interception position of the latter sub-signal and the termination interception position of the previous sub-signal is M1 element.

Exemplarily, the sending-end device and the receiving-end device are different devices, and the time unit is a symbol. The elements sent by the sending-end device on the first symbol group are shown in Figure 7a, assuming that the start time in the first time unit group is The initial position of the unit is time a, TA is equal to T _s , as shown in Figure 11a, the initial interception position of the initial sub-signal is at time a+T _s , and the initial interception position of the latter sub-signal is the same as that of the previous sub-signal There are 2 elements between the ending interception positions.

Optionally, no matter whether the receiver device and the sender device are the same device, if the time units included in the first time unit group are discontinuous in the second time unit group, the preset rule may also indicate that the second time unit The interval between the starting interception position corresponding to the next time unit in the unit group and the ending interception position corresponding to the previous time unit is M1*T _s , or in other words, the starting interception position corresponding to the latter time unit is the same as the previous time unit The terminal interception positions corresponding to the units are separated by M1 elements.

Optionally, when the time units included in the first time unit group are discontinuous in the second time unit group, the receiver device may perform the above-mentioned preset rules on the signal on each time unit in the second time unit group to truncate. Afterwards, the receiver device can determine which time units in the second time unit group carry subsequences of the second sequence and which time units do not carry the second sequence according to the mapping relationship between l ^* and l ^** , so that The intercepted information in the time unit of the second sequence is discarded or processed in other ways. In this scenario, the initial interception position of the initial sub-signal may be understood as the interception position corresponding to the initial time unit in the second time unit group.

Exemplarily, taking the time unit as a symbol, the elements sent by the sending end device on the first symbol group are shown in Figure 6a, assuming that the starting position of the start time unit in the second time unit group is time a, and TA is equal to T _s , as shown in Figure 11b, the initial interception position of the initial time unit is at time a+T _s , and the interval between the initial interception position corresponding to the next time unit and the termination interception position corresponding to the previous time unit is 2 element.

In addition, after the receiver device determines the mapping relationship between l ^* and l ^** , it can determine that the second sequence is carried on the 0th, 2nd, and 3rd time units in the second time unit group, and the first The time unit does not carry the second sequence, so that the information intercepted at the first time unit can be discarded or processed in other ways.

Optionally, when the time units included in the first time unit group are discontinuous in the second time unit group, the sending end device may send first indication information to the receiving end device, where the first indication information is used to indicate l ^* and the mapping relationship of l ^** . Correspondingly, after receiving the first indication information, the receiver device can obtain the mapping relationship between l ^* and l ^** according to the first indication information, so as to determine the time domain positions of the multiple time units carrying the second sequence.

Optionally, the first indication information may include a table to indicate the mapping relationship between l ^* and l ^** . Exemplarily, based on the example shown in FIG. 6a, the first indication information may include the following Table 6.

Table 6

l ^ l ^	l ^* l ^*
00	00
22	11
33	22

Alternatively, the first indication information may include two sets of indexes, where the first set of indexes includes multiple values of l ^** , and the second set of indexes includes multiple values of l ^* . The mapping relationship between l ^* and l ^** is indicated by the order of the indexes in the group, for example, the i-th l ^** in the first group of indexes corresponds to the i-th l ^* in the second group of indexes.

Exemplarily, based on the example shown in FIG. 6a , the first indication information may include: a first group index {0, 2, 3} and a second group index {0, 1, 2}.

Of course, the first indication information may also indicate the mapping relationship between l ^* and l ^** in other ways, which is not specifically limited in this application.

Optionally, after the device at the receiving end intercepts the l ^* th sub-signal of the received signal, the l ^* th subsequence of the third sequence obtained may include the first cyclic prefix corresponding to the l ^* th subsequence of the second sequence M2 elements and M3 elements of the l ^* th subsequence of the second sequence, M2 is less than or equal to the number of elements M1 included in the first cyclic prefix, and the sum of M2 and M3 is equal to M. In particular, the value of M2 may be 0, that is, the l ^* th subsequence of the third sequence may not include the first cyclic prefix corresponding to the l ^* th subsequence of the second sequence.

Optionally, since the first cyclic prefix corresponding to the l ^* th subsequence of the second sequence includes the last M1 elements of the l ^* th subsequence of the second sequence, therefore, for the l ^* th subsequence of the third sequence , regardless of whether M2 is equal to 0 or not, all elements of the l ^* th subsequence of the second sequence are included, the difference is that the order of all elements of the l ^* th subsequence of the second sequence in the l ^* th subsequence of the third sequence different.

Optionally, after the device at the receiving end intercepts the l ^* th sub-signal of the received signal, different sub-sequences of the obtained third sequence may include the same number of elements in the first cyclic prefix.

Optionally, if the receiver device and the sender device are the same device, execute the following step S5053; if the receiver device and the sender device are different devices, execute the following step S5052.

S5052. Generate a second sequence.

Optionally, the receiving-end device may generate the second sequence according to an instruction of the sending-end device. Exemplarily, the sending-end device may send the second indication information to the receiving-end device, and correspondingly, the receiving-end device receives the second indication information from the sending-end device. The second indication information may be used to indicate at least one of the following: the length of the first sequence, the generation parameters of the first sequence, the number of subsequences included in the second sequence, the number M of elements included in the subsequence, or the first The time domain position of the starting time unit in the time unit group. For the function of the time domain position of the starting time unit in the first time unit group, reference may be made to the related description in the above step S5051, which will not be repeated here.

Optionally, when the first sequence satisfies the above formula (4), the generation parameter of the first sequence indicates one or more of the following: α, N _ZC , or q.

In the case that the first sequence satisfies the above formula (6), the generation parameters of the first sequence indicate one or more of the following: the number of stages N of the shift register, the feedback connection mode of the N-stage shift register, or the N-stage shift The initial state of the bit register.

In the case that the first sequence satisfies the above formula (7), the generation parameters of the first sequence indicate one or more of the following: the number of stages N1 of the shift register corresponding to x ₁ (n), the feedback of the N1 stage shift register Connection mode, initial state of N1-level shift register, shift value N _c1 of x ₁ (n), number of stages N2 of shift register corresponding to x ₂ (n), feedback connection mode of N2-level shift register, N2 The initial state of the stage shift register, or the shift value N _c2 of x ₂ (n).

Optionally, after receiving the second indication information, the receiver device may generate the first sequence according to the length of the first sequence and the generation parameters of the first sequence, for example, the length of the first sequence and the generation parameters of the first sequence Substituting the above formula (4) or formula (6) or formula (7) to generate the first sequence. A second sequence is then generated according to the number of subsequences included in the second sequence, the number of elements included in the subsequence, and the positions of elements in the second sequence in the first sequence.

Optionally, the position of the elements in the second sequence in the first sequence satisfies the method 1 or method 2 in the above step S502, and the sending device may indicate to the receiving device whether the sending device uses method 1 or method 2, and correspondingly Yes, the receiver device uses the same method as the sender device. For example, when the transmitting device determines the second sequence according to the first sequence, the receiving device substitutes the number of subsequences and the number of elements included in the subsequence into the above formula (1) to generate the second sequence.

Optionally, the sending-end device may send the second indication information to the receiving-end device in the following manner, and the receiving-end device receives the second indication information from the sending-end device in a corresponding manner:

The sending end device may send radio resource control (radio resource control, RRC) signaling to the receiving end device, and the RRC signaling carries the second indication information. Correspondingly, the receiver device receives the RRC signaling from the transmitter device.

Or, in the case that the sending-end device is a network device and the receiving-end device is a terminal device, the sending-end device may send downlink control information (DCI) to the receiving-end device, and the DCI carries the second indication information. Correspondingly, the receiving device receives the DCI from the transmitting device.

Alternatively, in the case that both the transmitting-end device and the receiving-end device are terminal devices, the transmitting-end device may send sidelink control information (sidelink control information, SCI) to the receiving-end device, and the SCI carries the second indication information . Correspondingly, the receiving device receives the SCI from the sending device.

Or, in the case that the sending-end device is a network device and the receiving-end device is a terminal device, the sending-end device may send RRC signaling and DCI to the receiving-end device, and carry part of the second indication information in the RRC signaling. The DCI carries another part of the second indication information. Correspondingly, the receiving device receives the RRC and DCI from the transmitting device. For example, RRC carries information indicating the length of the first sequence and generation parameters of the first sequence, and DCI carries information indicating the number of subsequences included in the second sequence, the number of elements included in the subsequence number of information.

Alternatively, in the case that both the sending-end device and the receiving-end device are terminal equipment, the sending-end device may send RRC signaling and SCI to the receiving-end device, where the RRC signaling carries part of the second indication information, and the SCI Carry another part of the second indication information. Correspondingly, the receiving device receives the RRC and SCI from the transmitting device. For example, the SCI carries information indicating the length of the first sequence and the generation parameters of the first sequence, and the RRC carries information indicating the number of subsequences included in the second sequence and the number of elements included in the subsequence. number of information.

Optionally, the sending-end device may send the second sequence to the receiving-end device multiple times. For example, when the distance between the receiving-end device and the sending-end device needs to be obtained periodically or multiple times, the sending-end device may periodically or more The second sequence is sent to the receiving end device. In this scenario, when the sender device sends the second sequence for the first time, it can send the second indication information to the receiver device, and subsequently, the sender device can send the second indication information to the receiver device only when at least one of the following information changes :

It can be understood that, when at least one of the above items is changed, the second indication information sent by the device at the sending end indicates the changed parameter.

It should be noted that there is no strict execution order for the above steps S5021 and S5022, the steps can be executed first

S5021, and then execute step S5022; or, execute step S5022 first, and then execute step S5021; or execute steps S5021 and S5022 at the same time, without limitation.

S5023. Perform a circular correlation operation on the second sequence and the third sequence to obtain a correlation operation result.

Optionally, when the first time unit group is included in the second time unit group, the l ^** th time unit of the second time unit group carries the l ^* th subsequence of the second sequence, because l ^* and l ^** The mapping is not necessarily performed in sequence, for example, l ^** = 0 corresponds to l ^* = 0, l ^** = 2 corresponds to l ^* = 2, and l ^** = 3 corresponds to l ^* = 1 shown in Fig. 6b. At this time, the receiver device can learn the mapping relationship between l ^* and l ^** according to the instruction of the transmitter device, and adjust the order of the subsequences of the second sequence or the third sequence according to the mapping relationship, so that the subsequences of the second sequence The l ^* th subsequence is aligned with the l ^* th subsequence of the third sequence.

Optionally, the sequence obtained by adjusting the order of the subsequences of the second sequence may be called a local sequence. The order adjustment of the subsequences of the second sequence can also be completed in the above step S5022, at this time, step S5022 can be described as generating a local sequence.

Exemplarily, taking the time unit as a symbol, the elements sent by the sending end device on the first symbol group are shown in Figure 6b, the received signal of the reference signal obtained by the receiving end device is the same as that sent by the sending end device on the first symbol group The elements are the same, and M2 is equal to 1 as an example. The device at the receiving end intercepts the l ^* th sub-signal of the received signal, and the obtained third sequence can be shown in FIG. 12 . At this time, as shown in FIG. 12, the receiver device can adjust the order of the subsequences of the second sequence, for example, place the second subsequence of the second sequence between the 0th subsequence and the 1st subsequence, so that The l ^* th subsequence of the second sequence is aligned with the l ^* th subsequence of the third sequence. Alternatively, the receiver device may adjust the order of the subsequences of the third sequence, for example, place the first subsequence of the third sequence between the 0th subsequence and the second subsequence, so that the lth subsequence of the third sequence ^* The subsequence is aligned with the l ^* th subsequence of the second sequence.

It can be understood that for the example shown in FIG. 11a or FIG. 11b above, the receiver device does not need to adjust the order of the subsequences of the second sequence or the third sequence. After performing the above step S5051, the first l ^* of the third sequence subsequence is naturally aligned with the l ^* th subsequence of the second sequence.

Optionally, performing circular correlation operations on the second sequence and the third sequence may satisfy the following formula (8):

Among them, P(τ) is the result of the τth sub-operation of the correlation operation result,

Represents the l ^* th subsequence of the third sequence, and k-τ can be understood as a cyclic left shift of the kth element of the l ^* th subsequence of the third sequence by τ.

represents the l ^* th subsequence of the second sequence,

Indicates the kth element of the l ^* th subsequence of the second sequence, the superscript ^* in s ^* means conjugation, M1 is the number of elements included in the first cyclic prefix, τ=0,1,...M1-1 means τ is an integer from 0 to M1-1.

Exemplarily, based on the example shown in FIG. 11b, when τ is equal to 0, l ^* , k,

The value of can be shown in Table 7 below:

Table 7

Exemplarily, based on the example shown in FIG. 11b, when τ is equal to 1, l ^* , k,

The value of can be shown in Table 8 below:

Table 8

S5024. Determine the distance between the receiving end device and the target object according to the correlation calculation result.

Optionally, in a case where the receiving-end device and the sending-end device are the same device, the target object is an electromagnetic reflector. In the case that the receiving-end device and the sending-end device are different devices, the target object is the sending-end device.

Optionally, after the M1-1 sub-operation results are obtained through the above step S5023, the peak value among the M1-1 sub-operation results may be determined. Assuming that the peak value is the sub-operation result P(K) when τ is taken as K, in the case that the receiving device and the transmitting device are the same device, the distance between the receiving device and the target object satisfies the following formula (9); When the end device and the sending end device are different devices, the distance between the receiving end device and the target object satisfies the following formula (10).

d＝c ₀ ×(T+K*T _s )/2 (9)

Among them, d is the distance between the receiver device and the target object, c ₀ is the electromagnetic wave propagation speed, T is the difference between the start time of intercepting the received signal and the start time of sending the second sequence, and T _s is the phase The time interval between adjacent sampling points.

d＝c ₀ ×(TA+K*T _s ) (10)

Among them, d is the distance between the receiver device and the target object, c ₀ is the electromagnetic wave propagation speed, and T _s is the time interval between adjacent adopting points. Assuming that the sending-end device and the receiving-end device have been synchronized, TA is a timing advanced (time advanced, TA) between the sending-end device and the receiving-end device.

Optionally, in the case where the received signal of the reference signal acquired by the receiving end device in step S504 includes the second sequence and the second cyclic prefix, the above step S505 may include the following steps:

S505a. Intercept the received signal to obtain a third sequence. Wherein, the third sequence includes L elements.

Optionally, the device at the receiving end may determine the interception position corresponding to the received signal according to a preset rule; and then intercept the received signal according to the interception position corresponding to the received signal to obtain the third sequence.

Optionally, in the case that the receiving-end device and the sending-end device are different devices, and the sending-end device and the receiving-end device have been synchronized, the preset rule may indicate that the initial interception position of the received signal and the first time unit group The interval between the starting positions of the starting time units in is TA, and the intercepting time length of the received signal is L*T _s .

Optionally, when the device at the receiving end and the device at the sending end are the same device, the preset rule may indicate that the interval between the initial interception position of the received signal and the initial position of the initial time unit in the first time unit group is The interval of is M1*T _s /2, and the interception time length of the received signal is L*T _s .

Optionally, the third sequence may include the first L1 elements of the second sequence and the last L2 elements of the second cyclic prefix, and the sum of L1 and L2 is equal to L.

Exemplarily, the sending-end device and the receiving-end device are different devices, and the time unit is a symbol. The elements sent by the sending-end device on the first symbol group are shown in Figure 8, assuming that the start time in the first time unit group is The starting position of the unit is time a, TA is equal to T _s , as shown in Figure 13, the starting interception position of the received signal shown in the first row is at time a+T _s . After intercepting the received signal, as shown in the second row, the third sequence obtained after sorting the results shown in the second row includes 15 elements, of which the first element is the last element of the second cyclic prefix, and the remaining elements are The first 14 elements of the second sequence, ie L1 is equal to 14 and L2 is equal to 1.

Optionally, if the receiver device and the sender device are the same device, perform the following step S505c; if the receiver device and the sender device are different devices, perform the following step S505b.

S505b. Generate a second sequence.

For the implementation of step S505b, reference may be made to the description of step S5052 above, which will not be repeated here.

S505c. Perform a circular correlation operation on the second sequence and the third sequence to obtain a correlation operation result.

Optionally, performing circular correlation operations on the second sequence and the third sequence may satisfy the following formula (11):

Among them, P(τ) is the τth sub-operation result of the correlation operation result, y represents the third sequence, and l-τ can be understood as a cyclic left shift of the l-th element of the third sequence by τ. s(l) indicates the lth element of the second sequence, the superscript * in s ^* indicates conjugation, M1 is the number of elements included in the second cyclic prefix, τ=0,1,...M1-1 indicates that τ is An integer from 0 to M1-1.

Exemplarily, based on the example shown in FIG. 13, when τ is equal to 0, the values of l and y(l-τ)×s ^* (l) can be shown in Table 9 below:

Table 9

ll	y(l-τ)×s ^(l) y(l-τ)×s ^ (l)
l＝0l=0	R(14)×R ^(0) R(14)×R ^ (0)
l＝1l=1	R(0)×R ^(1) R(0)×R ^ (1)
l＝2l=2	R(1)×R ^(2) R(1)×R ^ (2)
l＝3l=3	R(2)×R ^(3) R(2)×R ^ (3)
l＝4l=4	R(3)×R ^(4) R(3)×R ^ (4)
l＝5l=5	R(4)×R ^(5) R(4)×R ^ (5)
l＝6l=6	R(5)×R ^(6) R(5)×R ^ (6)
l＝7l=7	R(6)×R ^(7) R(6)×R ^ (7)
l＝8l=8	R(7)×R ^(8) R(7)×R ^ (8)
l＝9l=9	R(8)×R ^(9) R(8)×R ^ (9)
l＝10l=10	R(9)×R ^(10) R(9)×R ^ (10)
l＝11l=11	R(10)×R ^(11) R(10)×R ^ (11)
l＝12l=12	R(11)×R ^(12) R(11)×R ^ (12)
l＝13l=13	R(12)×R ^(13) R(12)×R ^ (13)
l＝14l=14	R(13)×R ^(14) R(13)×R ^ (14)

Exemplarily, based on the example shown in FIG. 13, when τ is equal to 1, the values of l and y(l-τ)×s ^* (l) can be shown in Table 10 below:

Table 10

ll	y(l-τ)×s ^(l) y(l-τ)×s ^ (l)
l＝0l=0	R(0)×R ^(0) R(0)×R ^ (0)
l＝1l=1	R(1)×R ^(1) R(1)×R ^ (1)
l＝2l=2	R(2)×R ^(2) R(2)×R ^ (2)
l＝3l=3	R(3)×R ^(3) R(3)×R ^ (3)
l＝4l=4	R(4)×R ^(4) R(4)×R ^ (4)
l＝5l=5	R(5)×R ^(5) R(5)×R ^ (5)

l＝6l=6	R(6)×R ^(6) R(6)×R ^ (6)
l＝7l=7	R(7)×R ^(7) R(7)×R ^ (7)
l＝8l=8	R(8)×R ^(8) R(8)×R ^ (8)
l＝9l=9	R(9)×R ^(9) R(9)×R ^ (9)
l＝10l=10	R(10)×R ^(10) R(10)×R ^ (10)
l＝11l=11	R(11)×R ^(11) R(11)×R ^ (11)
l＝12l=12	R(12)×R ^(12) R(12)×R ^ (12)
l＝13l=13	R(13)×R ^(13) R(13)×R ^ (13)
l＝14l=14	R(14)×R ^(14) R(14)×R ^ (14)

S502d. Determine the distance between the receiving end device and the target object according to the correlation calculation result.

For the implementation of step S505d, reference may be made to the description of step S5054 above, which will not be repeated here.

So far, this application splits the longer sequence into multiple time units, so that the split sequence can still be reassembled into a long sequence when it is processed at the receiving end, such as Figure 11a, Figure 11b, Figure 12, And in FIG. 13, the third sequence is obtained by intercepting the received signal, thereby effectively increasing the length of the sequence, enhancing the anti-interference capability of the sequence, and reducing the interference between sequences sent by different devices.

In addition, when the receiving end processes the received sequence (the third sequence) and the local sequence (the second sequence), the third sequence and the second sequence fully conform to the arrangement of the cyclic shift, that is, the lth sequence of the third sequence The kth element in the ^* th subsequence is equal to the number of elements spaced between the kth element in the l ^* th subsequence of the second sequence, for example, the third sequence in Figure 11a, Figure 11b, and Figure 12 and the second sequence, when l ^* =0, from the point of view of circulation, there are 3 elements between R(12) and R(0), between R(0) and R(3), R(3) There are 3 elements between R(6) and R(9) and R(12), and when l ^* is equal to 1 and 2, this rule is also satisfied. Alternatively, the number of elements spaced between the lth element of the third sequence and the lth element of the second sequence is equal, and l is an integer from 0 to L-1, such as the third sequence and the second sequence in Figure 13, From the point of view of circulation, there is one element between R(14) and R(0), and this rule is also satisfied between R(0) and R(1) and other corresponding elements. Therefore, the correlation of long sequences can be fully utilized, thereby improving the accuracy of distance measurement.

It can be understood that, in each of the above embodiments, the methods and/or steps implemented by the sending device may also be implemented by components (such as processors, chips, chip systems, circuits, logic modules, or Software Implementation. The methods and/or steps implemented by the receiving end device may also be implemented by components (such as processors, chips, chip systems, circuits, logic modules, or software) that can be used in the receiving end device.

The foregoing mainly introduces the solutions provided by the present application. Correspondingly, the present application also provides a communication device, which is used to implement the above various methods. The communication device may be the sending end device in the above method embodiment, or a device including the above sending end device, or a component that can be used for the sending end device, such as a chip or a chip system. Alternatively, the communication device may be the receiving end device in the above method embodiment, or a device including the above receiving end device, or a component that can be used for the receiving end device, such as a chip or a chip system.

It can be understood that, in order to realize the above functions, the communication device includes hardware structures and/or software modules corresponding to each function. Those skilled in the art should easily realize that the present application can be implemented in the form of hardware or a combination of hardware and computer software in combination with the units and algorithm steps of each example described in the embodiments disclosed herein. Whether a certain function is executed by hardware or computer software drives hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.

The embodiments of the present application may divide the communication device into functional modules according to the above method embodiments. For example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The above-mentioned integrated modules can be implemented in the form of hardware or in the form of software function modules. It should be noted that the division of modules in the embodiment of the present application is schematic, and is only a logical function division, and there may be other division methods in actual implementation.

Optionally, taking the communication device as the sending end device in the foregoing method embodiment as an example, FIG. 14 shows a schematic structural diagram of a sending end device 140 . The sending end device 140 includes a processing module 1401 . Optionally, a transceiver module 1402 may also be included.

In some embodiments, the sending end device 140 may further include a storage module (not shown in FIG. 14 ) for storing program instructions and data.

In some embodiments, the transceiver module 1402, also referred to as a transceiver unit, is used to implement sending and/or receiving functions. The transceiver module 1402 may be composed of a transceiver circuit, a transceiver, a transceiver or a communication interface.

In some embodiments, the transceiving module 1402 may include a receiving module and a sending module, which are respectively used to perform the receiving and sending steps performed by the sending device in the above method embodiments, and/or used to support the Other processes of the technology; the processing module 1401 may be used to execute steps of the processing type (such as determination, acquisition, etc.) performed by the sending end device in the above method embodiments, and/or other processes used to support the technology described herein . E.g:

The processing module 1401 is configured to determine a first sequence, and the length of the first sequence is L; the processing module 1401 is also configured to determine a second sequence according to the first sequence, and the second sequence includes

subsequence, the subsequence includes M elements, and the kth element in the l ^* th subsequence of the second sequence is the first sequence in the first sequence

elements,

k=0,...,M-1,

The transceiver module 1402 is configured to send the second sequence, the second sequence is carried by the first time unit group, and the first time unit group includes

Optionally, the l ^* th time unit of the first time unit group also carries the first cyclic prefix corresponding to the l ^* th subsequence of the second sequence, and the first cyclic prefix corresponding to the l ^* th subsequence of the second sequence includes The last M1 elements of the l ^* th subsequence of the second sequence.

Optionally, the first time unit group is included in the second time unit group, the second time unit group includes N _symb time units, and N _symb is greater than

The first time unit group consists of

time units are not consecutive within the second time unit group.

Optionally, the first time unit group is included in the second time unit group, the second time unit group includes N _symb time units, and N _symb is equal to

The first time unit group consists of

time units are consecutive within the second time unit group.

Optionally, there is a mapping relationship between l ^* and l ^** , and the mapping relationship is that the l ^** th time unit of the second time unit group carries the l ^* th subsequence of the second sequence.

Optionally, the transceiving module 1402 is further configured to send first indication information to the receiving device, where the first indication information is used to indicate the mapping relationship between l ^* and l ^** .

Optionally, the transceiver module 1402 is further configured to send second indication information to the receiving end device, where the second indication information is used to indicate at least one of the following: the length of the first sequence, the generation parameters of the first sequence, the second sequence includes The number of subsequences of

Optionally, the transceiver module 1402 is configured to send the second indication information to the receiving device, including:

A transceiver module 1402, configured to send radio resource control RRC signaling to the receiving device, where the RRC signaling carries second indication information;

Alternatively, the transceiver module 1402 is configured to send downlink control information DCI to the receiving end device, and the DCI carries the second indication information;

Alternatively, the transceiver module 1402 is configured to send sidelink control information SCI to the receiving end device, where the SCI carries the second indication information;

Alternatively, the transceiver module 1402 is configured to send RRC signaling and DCI to the receiving end device, the RRC signaling carries part of the second indication information, and the DCI carries another part of the second indication information;

Alternatively, the transceiver module 1402 is configured to send RRC signaling and SCI to the receiving end device, the RRC signaling carries part of the second indication information, and the SCI carries another part of the second indication information.

Optionally, the transceiver module 1402 is configured to send the second indication information to the receiving end device, including: when at least one of the following items changes, the transceiver module 1402 is configured to send the second indication information to the receiving end device:

Optionally, the first sequence satisfies the following formula:

r(n)=Ae ^jαn x _q (n mod N _ZC ), n=0,1,2...L-1

Optionally, the generation parameter of the first sequence indicates one or more of the following: α, N _ZC , or q.

Optionally, the first sequence is generated by feedback-connected N-stage shift registers; the first sequence satisfies the following formula:

r(n+N)=(c _N r(n+N-1)+cn _-1 r(n+N-2)+...+c ₁ r(n)) mod2

Optionally, the generation parameters of the first sequence indicate one or more of the following: the number N of shift register stages, the feedback connection mode of N stages of shift registers, or the initial state of N stages of shift registers.

Optionally, the first sequence satisfies the following formula:

r(n)=(x ₁ (n+N _c1 )+x ₂ (n+N _c2 ))mod2, n=0,1,2...L-1

Among them, r(n) is the nth element of the first sequence, x ₁ (n) and x ₂ (n) are m sequences, N _c1 is the shift value of x ₁ (n), nc ₂ is x ₂ ( n) shift value.

Optionally, the generation parameters of the first sequence indicate one or more of the following: the number of stages N1 of the shift register corresponding to x ₁ (n), the feedback connection mode of the N1-stage shift register, and the initial stage of the N1-stage shift register state, the shift value N _c1 of x ₁ (n), the number of stages N2 of the shift register corresponding to x ₂ (n), the feedback connection mode of the N2-stage shift register, the initial state of the N2-stage shift register, or x ₂ (n) shift value N _c2 .

Wherein, all relevant content of each step involved in the above-mentioned method embodiment can be referred to the function description of the corresponding function module, and will not be repeated here.

In this application, the sending end device 140 is presented in the form of dividing various functional modules in an integrated manner. "Module" here may refer to a specific application-specific integrated circuit (ASIC), circuit, processor and memory that execute one or more software or firmware programs, integrated logic circuits, and/or other functions that can provide the above functions device.

In some embodiments, in terms of hardware implementation, those skilled in the art can imagine that the sending end device 140 may take the form of the communication device 400 shown in FIG. 4 .

As an example, the function/implementation process of the processing module 1401 in FIG. 14 may be implemented by the processor 401 in the communication device 400 shown in FIG. 4 invoking computer-executed instructions stored in the memory 403 . The function/implementation process of the transceiver module 1402 in FIG. 14 can be realized through the communication interface 404 in the communication device 400 shown in FIG. 4 .

In some embodiments, when the sending end device 140 in FIG. 14 is a chip or a chip system, the function/implementation process of the transceiver module 1402 can be realized through the input and output interface (or communication interface) of the chip or the chip system, and the processing module 1401 The function/implementation process of may be realized by a processor (or processing circuit) of a chip or a chip system.

Since the sending end device 140 provided in this embodiment can execute the above method, the technical effect it can obtain can refer to the above method embodiment, and will not be repeated here.

Optionally, taking the communication device as the receiving end device in the foregoing method embodiment as an example, FIG. 15 shows a schematic structural diagram of a receiving end device 150 . The receiver device 150 includes a processing module 1501 . Optionally, a transceiver module 1502 may also be included.

In some embodiments, the receiver device 150 may further include a storage module (not shown in FIG. 15 ) for storing program instructions and data.

In some embodiments, the transceiver module 1502 may also be referred to as a transceiver unit to implement sending and/or receiving functions. The transceiver module 1502 may be composed of a transceiver circuit, a transceiver, a transceiver or a communication interface.

In some embodiments, the transceiving module 1502 may include a receiving module and a sending module, which are respectively used to perform the receiving and sending steps performed by the receiving end device in the above method embodiments, and/or used to support the Other processes of the technology; the processing module 1501 may be used to execute steps of the processing type (such as determination, acquisition, etc.) performed by the receiving end device in the above method embodiments, and/or other processes used to support the technology described herein . E.g:

The processing module 1501 is configured to acquire a received signal of a reference signal on a first time unit group, the reference signal includes a second sequence determined according to the first sequence, and the second sequence includes

elements,

k=0,...,M-1,

The second sequence is carried by the first time unit group consisting of

time units, the l ^* th time unit in the first time unit group carries the l ^* th subsequence of the second sequence; the processing module 1501 is also configured to process the received signal according to the second sequence.

The first time unit group consists of

time units are not consecutive within the second time unit group.

The first time unit group consists of

time units are consecutive within the second time unit group.

Optionally, the transceiver module 1502 is configured to receive first indication information from the sending end device, where the first indication information is used to indicate the mapping relationship between l ^* and l ^** .

Optionally, the transceiver module 1502 is further configured to receive second indication information from the sending end device, where the second indication information is used to indicate at least one of the following:

Optionally, the transceiver module 1502 is configured to receive the second indication information from the sending device, including:

A transceiver module 1502, configured to receive radio resource control RRC signaling from the sending end device, where the RRC signaling carries second indication information;

Alternatively, the transceiver module 1502 is configured to receive downlink control information DCI from the sender device, where the DCI carries second indication information;

Alternatively, the transceiving module 1502 is configured to receive sidelink control information SCI from the sending end device, where the SCI carries the second indication information;

Alternatively, the transceiver module 1502 is configured to receive RRC signaling and DCI from the sending end device, the RRC signaling carries part of the second indication information, and the DCI carries another part of the second indication information;

Alternatively, the transceiver module 1502 is configured to receive RRC signaling and SCI from the sending end device, the RRC signaling carries part of the second indication information, and the SCI carries another part of the second indication information.

Optionally, the first sequence satisfies the following formula:

r(n)=Ae ^jαn x _q (n mod N _ZC ), n=0,1,2...L-1

r(n+N)=(c _N r(n+N-1)+c _N-1 r(n+N-2)+...+c ₁ r(n)) mod2

Optionally, the first sequence satisfies the following formula:

r(n)=(x ₁ (n+N _c1 )+x ₂ (n+N _c2 ))mod2, n=0,1,2...L-1

In this application, the receiver device 150 is presented in the form of dividing various functional modules in an integrated manner. "Module" here may refer to a specific application-specific integrated circuit (ASIC), circuit, processor and memory that execute one or more software or firmware programs, integrated logic circuits, and/or other functions that can provide the above functions device.

In some embodiments, in terms of hardware implementation, those skilled in the art can imagine that the receiver device 150 may take the form of the communication device 400 shown in FIG. 4 .

As an example, the function/implementation process of the processing module 1501 in FIG. 15 may be implemented by the processor 401 in the communication device 400 shown in FIG. 4 invoking computer-executed instructions stored in the memory 403 . The function/implementation process of the transceiver module 1502 in FIG. 15 can be realized through the communication interface 404 in the communication device 400 shown in FIG. 4 .

In some embodiments, when the receiving end device 150 in FIG. 15 is a chip or a chip system, the function/implementation process of the transceiver module 1502 can be realized through the input and output interface (or communication interface) of the chip or the chip system, and the processing module 1501 The function/implementation process of may be realized by a processor (or processing circuit) of a chip or a chip system.

Since the receiver device 150 provided in this embodiment can execute the above-mentioned method, the technical effect it can obtain can refer to the above-mentioned method embodiment, which will not be repeated here.

As a possible product form, the sending end device or receiving end device described in the embodiment of the present application can also be realized by using the following: one or more field programmable gate arrays (field programmable gate array, FPGA), Programmable logic device (PLD), controller, state machine, gate logic, discrete hardware components, any other suitable circuit, or any combination of circuits capable of performing the various functions described throughout this application.

As another possible product form, the sending-end device or the receiving-end device described in the embodiment of the present application may be implemented by a general bus architecture. For ease of description, refer to FIG. 16 , which is a schematic structural diagram of a communication device 1600 provided by an embodiment of the present application, where the communication device 1600 includes a processor 1601 and a transceiver 1602 . The communication device 1600 may be a sending end device or a receiving end device, or a chip therein. FIG. 16 shows only the main components of the communication device 1600 . In addition to the processor 1601 and the transceiver 1602, the communication device may further include a memory 1603 and an input and output device (not shown in the figure).

Wherein, the processor 1601 is mainly used for processing communication protocols and communication data, controlling the entire communication device, executing software programs, and processing data of the software programs. The memory 1603 is mainly used to store software programs and data. The transceiver 1602 may include a radio frequency circuit and an antenna, and the radio frequency circuit is mainly used for converting a baseband signal to a radio frequency signal and processing the radio frequency signal. Antennas are mainly used to send and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users.

Wherein, the processor 1601, the transceiver 1602, and the memory 1603 may be connected through a communication bus.

When the communication device is turned on, the processor 1601 can read the software program in the memory 1603, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor 1601 performs baseband processing on the data to be sent, and then outputs the baseband signal to the radio frequency circuit. When data is sent to the communication device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 1601, and the processor 1601 converts the baseband signal into data and processes the data deal with.

In another implementation, the radio frequency circuit and the antenna can be set independently from the processor for baseband processing. For example, in a distributed scenario, the radio frequency circuit and antenna can be arranged remotely from the communication device. .

In some embodiments, the embodiments of the present application further provide a communication device, where the communication device includes a processor, configured to implement the method in any one of the foregoing method embodiments.

As a possible implementation manner, the communication device further includes a memory. This memory is used to save necessary computer programs and data. The computer program may include instructions, and the processor may invoke the instructions in the computer program stored in the memory to instruct the communication device to execute the method in any one of the above method embodiments. Of course, the memory may not be in the communication device.

As another possible implementation, the communication device further includes an interface circuit, the interface circuit is a code/data read and write interface circuit, and the interface circuit is used to receive computer-executed instructions (computer-executed instructions are stored in the memory, and may be directly read from memory read, or possibly through other devices) and transferred to the processor.

As yet another possible implementation manner, the communication device further includes a communication interface, where the communication interface is used to communicate with modules other than the communication device.

It can be understood that the communication device may be a chip or a system-on-a-chip. When the communication device is a system-on-a-chip, it may consist of a chip, or may include a chip and other discrete devices, which is not specifically limited in this embodiment of the present application.

The present application also provides a computer-readable storage medium, on which a computer program or instruction is stored, and when the computer program or instruction is executed by a computer, the functions of any one of the above method embodiments are realized.

The present application also provides a computer program product, which implements the functions of any one of the above method embodiments when executed by a computer.

Those skilled in the art can understand that, for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

It can be understood that the systems, devices and methods described in this application can also be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, that is, they may be located in one place, or may be distributed to multiple network units. Components shown as units may or may not be physical units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.

In the above embodiments, all or part of them may be implemented by software, hardware, firmware or any combination thereof. When implemented using a software program, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server, or data center Transmission to another website site, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer, or may be a data storage device including one or more servers, data centers, etc. that can be integrated with the medium. The available medium may be a magnetic medium (such as a floppy disk, a hard disk, or a magnetic tape), an optical medium (such as a DVD), or a semiconductor medium (such as a solid state disk (solid state disk, SSD)), etc. In the embodiment of the present application, the computer may include the aforementioned apparatus.

Although the present application has been described in conjunction with various embodiments here, however, in the process of implementing the claimed application, those skilled in the art can understand and Other variations of the disclosed embodiments are implemented. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude a plurality. A single processor or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that these measures cannot be combined to advantage.

Although the application has been described in conjunction with specific features and embodiments thereof, it will be apparent that various modifications and combinations can be made thereto without departing from the spirit and scope of the application. Accordingly, the specification and drawings are merely illustrative of the application as defined by the appended claims and are deemed to cover any and all modifications, variations, combinations or equivalents within the scope of this application. Obviously, those skilled in the art can make various changes and modifications to the application without departing from the spirit and scope of the application. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims

A method for sending a reference signal, characterized in that the method comprises:

determining a first sequence, the length of the first sequence is L;

According to the first sequence, determine a second sequence, the second sequence includes
subsequence, the subsequence includes M elements, and the kth element in the l * th subsequence of the second sequence is the first sequence in the first sequence
elements,
k=0,...,M-1,

sending the second sequence, the second sequence is carried by a first time unit group, and the first time unit group includes
time units, the l * th time unit in the first time unit group carries the l * th subsequence of the second sequence.
The method according to claim 1, wherein the l*th time unit of the first time unit group also carries the first cyclic prefix corresponding to the l * th subsequence of the second sequence, and the first The first cyclic prefix corresponding to the l * th subsequence of the second sequence includes the last M1 elements of the l * th subsequence of the second sequence.
The method according to claim 1 or 2, wherein the first time unit group is included in the second time unit group, the second time unit group includes N symb time units, and the N symb is greater than said
The first time unit group includes
time units are not consecutive within the second group of time units.
The method according to claim 1 or 2, wherein the first time unit group is included in the second time unit group, the second time unit group includes N symb time units, and the N symb is equal to said
The first time unit group includes
time units are consecutive within the second time unit group.
The method according to claim 3 or 4, wherein there is a mapping relationship between the l * and l ** , and the mapping relationship is that the l ** th time unit of the second time unit group carries the The l * th subsequence of the second sequence.
The method according to claim 5, wherein the method further comprises:

Sending first indication information to the receiving end device, where the first indication information is used to indicate a mapping relationship between the l * and the l ** .
The method according to any one of claims 1-6, wherein the method further comprises:

Sending second indication information to the receiving end device, where the second indication information is used to indicate at least one of the following: the length of the first sequence, the generation parameters of the first sequence, and the subsequences included in the second sequence number of
The number M of elements included in the subsequence, or the time domain position of the starting time unit in the first time unit group.
The method according to claim 7, wherein the sending the second indication information to the receiving device comprises:

sending radio resource control RRC signaling to the receiving device, where the RRC signaling carries the second indication information;

Or, sending downlink control information DCI to the receiver device, where the DCI carries the second indication information;

Or, sending sidelink control information SCI to the receiving end device, where the SCI carries the second indication information;

Or, send RRC signaling and DCI to the receiving end device, where the RRC signaling carries part of the second indication information, and the DCI carries another part of the second indication information;

Or, send RRC signaling and SCI to the receiving end device, where the RRC signaling carries part of the second indication information, and the SCI carries another part of the second indication information.
The method according to claim 7 or 8, wherein the sending the second indication information to the receiving device comprises:

When at least one of the following changes, the second indication information is sent to the receiving end device: the length of the first sequence, the generation parameters of the first sequence, and the subsequences included in the second sequence Number
The number M of elements included in the subsequence, or the time domain position of the starting time unit in the first time unit group.
The method according to any one of claims 1-9, wherein the first sequence satisfies the following formula:

r(n)=Ae jαn x q (n mod N ZC ), n=0,1,2...L-1

Wherein, r(n) is the nth element of the first sequence, A is a complex number independent of n, j is an imaginary unit, α is a real number independent of n, N ZC is the largest prime number less than or equal to L or The smallest prime number greater than L or the largest prime number less than or equal to 2L or the smallest prime number greater than 2L, q is an integer greater than 0 and less than N ZC .
The method according to claim 10, wherein the generation parameter of the first sequence indicates one or more of the following: the α, the N ZC , or the q.
The method according to any one of claims 1-9, wherein the first sequence is generated by an N-stage shift register connected by feedback; the first sequence satisfies the following formula:

r(n+N)=(c N r(n+N-1)+c N-1 r(n+N-2)+...+c 1 r(n)) mod2

Wherein, n=0,1,2...LN-1, c i is the feedback coefficient of the i-th shift register, i=1,2,...N.
The method according to claim 12, wherein the generation parameters of the first sequence indicate one or more of the following:

The number of stages N of the shift register, the feedback connection mode of the N-stage shift register, or the initial state of the N-stage shift register.
The method according to any one of claims 1-11, wherein the first sequence satisfies the following formula:

r(n)=(x 1 (n+N c1 )+x 2 (n+N c2 ))mod2, n=0,1,2...L-1

Wherein, r(n) is the nth element of the first sequence, x 1 (n) and x 2 (n) are m sequences, N c1 is the shift value of x 1 (n), N c2 is x 2 (n) shift value.
The method according to claim 14, wherein the generation parameters of the first sequence indicate one or more of the following:

The number of stages N1 of the shift register corresponding to the x 1 (n), the feedback connection mode of the N1 stage shift register, the initial state of the N1 stage shift register, the shift value N of the x 1 (n) c1 , the stage number N2 of the shift register corresponding to x 2 (n), the feedback connection mode of the N2 stage shift register, the initial state of the N2 stage shift register, or the shift of the x 2 (n) bit value N c2 .
A method for receiving a reference signal, characterized in that the method comprises:

Obtain a received signal of a reference signal on a first time unit group, the reference signal includes a second sequence determined according to the first sequence, the second sequence includes
subsequence, the subsequence includes M elements, and the kth element in the l * th subsequence of the second sequence is the first sequence in the first sequence
elements,
k=0,...,M-1,
The second sequence is carried by a first time unit group, and the first time unit group includes
time units, the l * th time unit in the first time unit group carries the l * th subsequence of the second sequence;

The received signal is processed according to the second sequence.
The method according to claim 16, wherein the l * th time unit of the first time unit group also carries the first cyclic prefix corresponding to the l * th subsequence of the second sequence, and the first The first cyclic prefix corresponding to the l * th subsequence of the second sequence includes the last M1 elements of the l * th subsequence of the second sequence.
The method according to claim 16 or 17, wherein the first time unit group is included in the second time unit group, the second time unit group includes N symb time units, and the N symb is greater than said
The first time unit group includes
time units are not consecutive within the second group of time units.
The method according to claim 16 or 17, wherein the first time unit group is included in the second time unit group, the second time unit group includes N symb time units, and the N symb is equal to said
The first time unit group includes
time units are consecutive within the second time unit group.
The method according to claim 18 or 19, characterized in that there is a mapping relationship between the l * and l ** , and the mapping relationship is that the l ** th time unit of the second time unit group carries the The l * th subsequence of the second sequence.
The method according to claim 20, further comprising:

Receive first indication information from the sending end device, where the first indication information is used to indicate a mapping relationship between the l * and the l ** .
The method according to any one of claims 16-21, wherein the method further comprises:

Receive second indication information from the sending end device, where the second indication information is used to indicate at least one of the following: the length of the first sequence, the generation parameters of the first sequence, and the substrings included in the second sequence number of sequences
The number M of elements included in the subsequence of the second sequence, or the time domain position of the starting time unit in the first time unit group.
The method according to claim 22, wherein receiving the second indication information from the sending end device comprises:

receiving radio resource control RRC signaling from the sending end device, where the RRC signaling carries the second indication information;

Or, receive downlink control information DCI from the sending end device, where the DCI carries the second indication information;

Or, receive sidelink control information SCI from the sending end device, where the SCI carries the second indication information;

Or, receive RRC signaling and DCI from the sending end device, where the RRC signaling carries part of the second indication information, and the DCI carries another part of the second indication information;

Or, receive RRC signaling and SCI from the sending end device, where the RRC signaling carries part of the second indication information, and the SCI carries another part of the second indication information.
The method according to any one of claims 16-23, wherein the first sequence satisfies the following formula:

r(n)=Ae jαn x q (n mod N ZC ), n=0,1,2...L-1

Wherein, r(n) is the nth element of the first sequence, A is a complex number independent of n, j is an imaginary unit, α is a real number independent of n, N ZC is the largest prime number less than or equal to L or The smallest prime number greater than L or the largest prime number less than or equal to 2L or the smallest prime number greater than 2L, q is an integer greater than 0 and less than N ZC .
The method according to claim 24, wherein the generation parameter of the first sequence indicates one or more of the following: the α, the N ZC , or the q.
The method according to any one of claims 16-23, wherein the first sequence is generated by an N-stage shift register connected by feedback; the first sequence satisfies the following formula:

r(n+N)=(c N r(n+N-1)+c N-1 r(n+N-2)+...+c 1 r(n)) mod2

Wherein, n=0,1,2...LN-1, c i is the feedback coefficient of the i-th shift register, i=1,2,...N.
The method according to claim 26, wherein the generation parameters of the first sequence indicate one or more of the following:

The number of stages N of the shift register, the feedback connection mode of the N-stage shift register, or the initial state of the N-stage shift register.
The method according to any one of claims 16-23, wherein the first sequence satisfies the following formula:

r(n)=(x 1 (n+N c1 )+x 2 (n+N c2 ))mod2, n=0,1,2...L-1

Wherein, r(n) is the nth element of the first sequence, x 1 (n) and x 2 (n) are m sequences, N c1 is the shift value of x 1 (n), and N c2 is x 2 (n) shift value.
The method according to claim 28, wherein the generation parameters of the first sequence indicate one or more of the following:

The number of stages N1 of the shift register corresponding to the x 1 (n), the feedback connection mode of the N1 stage shift register, the initial state of the N1 stage shift register, the shift value N of the x 1 (n) c1 , the stage number N2 of the shift register corresponding to the x 2 (n), the feedback connection mode of the N2 stage shift register, the initial state of the N2 stage shift register, or the shift of the x 2 (n) bit value N c2 .
A communication device, characterized in that the communication device comprises: one or more processors, configured to execute instructions to enable the communication device to implement the method according to any one of claims 1-15, or, by The communication device is made to implement the method according to any one of claims 16-29.