CN116235585B

CN116235585B - Signal transmitting method, signal receiving method, communication device and storage medium

Info

Publication number: CN116235585B
Application number: CN202080105362.0A
Authority: CN
Inventors: 曲秉玉; 李博; 龚名新
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2024-09-10
Anticipated expiration: 2040-09-30
Also published as: CN116235585A; WO2022067811A1

Abstract

The embodiment of the application provides a signal transmitting method, a signal receiving method, a communication device and a storage medium, comprising the following steps: the method comprises the steps that a sending end receives/sends signaling, and the signaling indicates a first reference signal combination; the transmitting end transmits the at least one first reference signal; the reference signal set comprises at least two reference signal groups, sequences in a first orthogonal sequence group/a second orthogonal sequence group in the at least two reference signal groups are mutually orthogonal, and any sequence in the first orthogonal sequence group and any sequence in the second orthogonal sequence group are different; the mask sequence corresponding to the first orthogonal sequence set is different from the mask sequence corresponding to the second orthogonal sequence set. By adopting the scheme, the interference of pilot signals between different layers can be reduced, and the channel estimation performance can be improved.

Description

Signal transmitting method, signal receiving method, communication device and storage medium

Technical Field

The present application relates to the field of communications technologies, and in particular, to a signal transmission method, a signal reception method, a communication device, and a storage medium.

Background

In the existing mobile communication system, the maximum multiplexing number of orthogonal demodulation reference signals (demodulation REFERENCE SIGNAL, DMRS) supported by the system is limited. Taking a New air interface (New RAT, NR) wireless access technology as an example, when uplink or downlink communication adopts an orthogonal frequency division multiplexing (cyclic prefixed orthogonal frequency division multiplexing, CP-OFDM) waveform based on a cyclic prefix, the CP-OFDM waveform can support two DMRS configurations, namely configuration type 1 (configuration type 1) and configuration type 2 (configuration type). Under configuration type 1 (configuration type 1), the system supports 8 orthogonal DMRS multiplexing at maximum; in configuration type 2 (configuration type 2), the system supports a maximum of 12 orthogonal DMRS multiplexes.

With the development of mobile communication and the advent of emerging services, the demand for high rates is increasing. Increasing the number of transmission layers for multi-user pairing is beneficial to improving the throughput of the system. Therefore, when the number of layers transmitted by one cell is relatively large, more DMRSs need to be supported. In the prior art, different scrambling codes are used, and non-orthogonal DMRS is introduced so as to achieve the purpose of expanding the number of the DMRS. For example, using two scrambling codes, type 1 can be extended to 16 DMRS at maximum, and type 2 can be extended to 24 DMRS at maximum. In the prior art, the scrambling code of the DMRS is a Gold sequence, and under the OFDM waveform, although the complete Gold sequence has good cross-correlation properties, since the DMRS uses fragments of Gold sequences, the cross-correlation of sequences of non-orthogonal DMRS is relatively large, and the cross-correlation is large, which causes relatively large interference among the non-orthogonal DMRS and seriously affects the channel estimation performance.

Therefore, how to reduce interference between non-orthogonal DMRSs based on the introduction of non-orthogonal DMRSs is a problem that needs to be solved at present.

Disclosure of Invention

The application discloses a signal transmitting method, a signal receiving method, a communication device and a storage medium, which can improve channel estimation performance.

In a first aspect, the present application provides a signal transmission method, including: a transmitting end receives/transmits a signaling, wherein the signaling carries a preset domain segment and indicates a first reference signal combination, and the first reference signal combination comprises one or more reference signals; wherein, different values of the preset domain segment in the signaling correspond to a plurality of reference signal combinations; all reference signals included in the plurality of reference signal combinations form a reference signal set, and the reference signal set comprises at least two reference signal groups; reference signal sequences for each reference signal in the at least two reference signal groupsThe method meets the following conditions: w _g,p(n)·r(m)·c_g (t); wherein m=0, 1, …, M-1, M is Is a sequence length of (2); a is a non-zero complex number; r (m) is a pseudo-random sequence; wherein the length of the sequence w _g,p (DEG) is N _g, and the value range of the independent variable is 0,1, … and N _g -1.N satisfies n=mmod N _g, M is not less than 2N _g, g is the identity of the orthogonal sequence group, and the at least two reference signal groups satisfy the following conditions: reference signal sequences of all reference signals in the first reference signal groupThe corresponding orthogonal sequences w _g,p (·) form a first orthogonal sequence group, the reference signal sequences of all reference signals in the second reference signal groupThe corresponding orthogonal sequences w _g,p (·) form a second orthogonal sequence set; traversing at least a first orthogonal sequence group and a second orthogonal sequence group; p traversing all sequences in the orthogonal sequence group; sequences in the first orthogonal sequence group are orthogonal to each other, sequences in the second orthogonal sequence group are orthogonal to each other, and any sequence in the first orthogonal sequence group and any sequence in the second orthogonal sequence group are different; wherein, Sequence c _g (·) is one sequence in the first set of mask sequences, and the range of self-variable values isWherein, Other forms are also possible, e.gEtc. The sequence c _g (·) corresponding to the first orthogonal sequence set is different from the sequence c _g (·) corresponding to the second orthogonal sequence set; the sequence r (m) corresponding to the first sequence group is identical to the sequence r (m) corresponding to the second sequence group; the transmitting end generates and transmits the one or more reference signals.

By the embodiment of the application, the transmitting end is based on the sequenceGenerating a reference signal, wherein the sequenceThe corresponding orthogonal sequence w _g,p (·) is a sequence in at least a first orthogonal sequence group or a second orthogonal sequence group, the sequences in the first orthogonal sequence group are orthogonal to each other, the sequences in the second orthogonal sequence group are orthogonal to each other, and at the same time, any sequence in the first orthogonal sequence group is different from any sequence in the second orthogonal sequence group; and, the sequence c _g (·) corresponding to the first orthogonal sequence set is different from the sequence c _g (·) corresponding to the second orthogonal sequence set. In contrast to the prior art, the cross-correlation value between the sequence of the one or more reference signals and the sequence of the reference signal allocated for other terminal devices that is not orthogonal to it is independent of the scrambling sequence r (m), avoiding the situation that the cross-correlation is poor due to the randomness of the scrambling code, but only related to the sequence w _g,p(·)、c_g (°). Therefore, when the signal transmission method provided by the scheme is adopted for multi-layer transmission, the interference of pilot signals between different layers can be reduced, and the channel estimation performance can be improved.

Wherein the sequence c _g (·) satisfies: wherein e _g denotes a sequence of length L, Represents the alpha-time Cronecker product of e _g, said alpha satisfyingE _g corresponding to the plurality of reference signal sequences form a second mask sequence set, where L is a positive integer.

The length of the sequence corresponding to the first orthogonal sequence group is the same as the length of the sequence corresponding to the second orthogonal sequence group.

When the frequency resources of the reference signals in the at least two reference signal groups comprise the same resource block, the reference signal sequences corresponding to the sequences of the first orthogonal sequence group and the reference signal sequences corresponding to the sequences of the second orthogonal sequence group are mapped on the same subcarrier in the same resource block.

As one implementation, the sequences of the first orthogonal sequence set include the following sequences: {1,1}; {1, -1}; the sequences of the second orthogonal sequence set include the following sequences: {1,1i }; {1, -1i }; or the sequences of the first orthogonal sequence set include the following sequences: {1,1i }; {1, -1i }; the sequences of the second orthogonal sequence set include the following sequences: {1,1}; {1, -1}; wherein i is an imaginary unit, 1i represents i, -1i represents-i, and the description thereof is omitted. The communication system also has a unit in which j represents an imaginary number.

As another implementation, the sequences of the first orthogonal sequence group/the second orthogonal sequence group include the following sequences: {1, 1}; {1, -1, -1}; {1, -1, -1}; {1, -1,1}; or the sequences of the first orthogonal sequence group/the second orthogonal sequence group comprise the following sequences: {1, -1, -1i, -1i }; {1, -1i,1i }; {1, -1,1i }; {1,1i, -1i }; or the sequences of the first orthogonal sequence group/the second orthogonal sequence group comprise the following sequences: {1, -1i, -1i, -1}; {1,1i, -1i,1}; {1, -1i,1}; {1,1i, -1}; or the sequences of the first orthogonal sequence group/the second orthogonal sequence group comprise the following sequences: {1, -1i, -1, -1i }; {1,1i, -1,1i }; {1, -1i,1i }; {1,1i,1, -1i }; where i is an imaginary unit.

As yet another implementation, the sequences of the first orthogonal sequence set/second orthogonal sequence set include the following sequences:

{-1i,-1,1i,-1,1i,-1,1i,1};{-1i,1,1i,1,1i,1,1i,-1};{-1i,-1,-1i,1,1i,-1,-1i,-1};{-1i,1,-1i,-1,1i,1,-1i,1};{-1i,-1,1i,-1,-1i,1,-1i,-1};{-1i,1,1i,1,-1i,-1,-1i,1};{-1i,-1,-1i,1,-1i,1,1i,1};{-1i,1,-1i,-1,-1i,-1,1i,-1}; Or the first orthogonal sequence group/the second orthogonal sequence group includes the following sequence ：{1i,-1i,-1,-1,1i,1i,-1,1};{1i,1i,-1,1,1i,-1i,-1,-1};{1i,-1i,1,1,1i,1i,1,-1};{1i,1i,1,-1,1i,-1i,1,1};{1i,-1i,-1,-1,-1i,-1i,1,-1};{1i,1i,-1,1,-1i,1i,1,1};{1i,-1i,1,1,-1i,-1i,-1,1};{1i,1i,1,-1,-1i,1i,-1,-1}; or the first orthogonal sequence group/the second orthogonal sequence group includes the following sequence ：{1i,1i,1i,-1i,-1,-1,-1,1};{1i,-1i,1i,1i,-1,1,-1,-1};{1i,1i,-1i,1i,-1,-1,1,-1};{1i,-1i,-1i,-1i,-1,1,1,1};{1i,1i,1i,-1i,1,1,1,-1};{1i,-1i,1i,1i,1,-1,1,1};{1i,1i,-1i,1i,1,1,-1,1};{1i,-1i,-1i,-1i,1,-1,-1,-1}; or the first orthogonal sequence group/the second orthogonal sequence group includes the following sequence ：{-1,1i,-1,1i,1i,-1,-1i,1};{-1,-1i,-1,-1i,1i,1,-1i,-1};{-1,1i,1,-1i,1i,-1,1i,-1};{-1,-1i,1,1i,1i,1,1i,1};{-1,1i,-1,1i,-1i,1,1i,-1};{-1,-1i,-1,-1i,-1i,-1,1i,1};{-1,1i,1,-1i,-1i,1,-1i,1};{-1,-1i,1,1i,-1i,-1,-1i,-1}; or the first orthogonal sequence group/the second orthogonal sequence group includes the following sequence ：{1i,-1,-1,1i,-1,-1i,1i,1};{1i,1,-1,-1i,-1,1i,1i,-1};{1i,-1,1,-1i,-1,-1i,-1i,-1};{1i,1,1,1i,-1,1i,-1i,1};{1i,-1,-1,-1,1i,1,1i,-1i,-1};{1i,1,-1,-1i,1,-1i,-1i,1};{1i,-1,1,-1i,1,1i,1i,1};{1i,1,1,1i,1,-1i,1i,-1}; or the first orthogonal sequence group/the second orthogonal sequence group includes the following sequence ：{-1,1i,-1i,-1,-1,1i,1i,1};{-1,-1i,-1i,1,-1,-1i,1i,-1};{-1,1i,1i,1,-1,1i,-1i,-1};{-1,-1i,1i,-1,-1,-1i,-1i,1};{-1,1i,-1i,-1,1,-1i,-1i,-1};{-1,-1i,-1i,1,1,1i,-1i,1};{-1,1i,1i,1,1,-1i,1i,1};{-1,-1i,1i,-1,1,1i,1i,-1}; or the first orthogonal sequence group/the second orthogonal sequence group includes the following sequence ：{-1,-1,1i,1i,-1i,1i,-1,1};{-1,1,1i,-1i,-1i,-1i,-1,-1};{-1,-1,-1i,-1i,-1i,1i,1,-1};{-1,1,-1i,1i,-1i,-1i,1,1};{-1,-1,1i,1i,1i,-1i,1,-1};{-1,1,1i,-1i,1i,1i,1,1};{-1,-1,-1i,-1i,1i,-1i,-1,1};{-1,1,-1i,1i,1i,1i,-1,-1}; or the first orthogonal sequence group/the second orthogonal sequence group includes the following sequence ：{1,1,1,1,1,1,1,1};{1,-1,1,-1,1,-1,1,-1};{1,1,-1,-1,1,1,-1,-1};{1,-1,-1,1,1,-1,-1,1};{1,1,1,1,-1,-1,-1,-1};{1,-1,1,-1,-1,1,-1,1};{1,1,-1,-1,-1,-1,1,1};{1,-1,-1,1,-1,1,1,-1};, wherein i is an imaginary unit.

Wherein the local sequence cross-correlation of the sequences of the reference signals among the reference signal sequence groups is only related to the sequences w _g,p (n), wherein the cross-correlation values among w _g,p (n) are allThe cross-correlation is optimal. The local cross correlation of the reference signals can be optimally used for effectively resisting channel fading, and the channel estimation performance is improved.

Alternatively, the length of the sequence corresponding to the first orthogonal sequence group is 2 times that of the sequence corresponding to the second orthogonal sequence group.

When the frequency resources of the reference signals in the at least two reference signal groups comprise the same resource block, the reference signal sequence corresponding to the sequence of the first orthogonal sequence group is mapped to a first subcarrier with medium interval in the same resource block, the center frequency distance of the adjacent subcarrier in the first subcarrier is k subcarriers, the reference signal sequence corresponding to the sequence of the second orthogonal sequence group is mapped to a second subcarrier with medium interval in the same resource block, the center frequency distance of the adjacent subcarrier in the second subcarrier is 2k subcarriers, and k is a positive integer.

Wherein the sequences of the first orthogonal sequence set include the following sequences: {1, -1, -1i, -1i }; {1, -1i,1i }; {1, -1,1i }; {1,1i, -1i }; or the sequences of the first orthogonal sequence set include the following sequences: {1, -1i, -1i, -1}; {1,1i, -1i,1}; {1, -1i,1}; {1,1i, -1}; wherein the sequences of the second orthogonal sequence set include the following sequences: {1,1}; {1, -1}; where i is an imaginary unit.

As another implementation manner, the sequence of the first orthogonal sequence group includes the following sequence ：{-1i,-1,1i,-1,1i,-1,1i,1};{-1i,1,1i,1,1i,1,1i,-1};{-1i,-1,-1i,1,1i,-1,-1i,-1};{-1i,1,-1i,-1,1i,1,-1i,1};{-1i,-1,1i,-1,-1i,1,-1i,-1};{-1i,1,1i,1,-1i,-1,-1i,1};{-1i,-1,-1i,1,-1i,1,1i,1};{-1i,1,-1i,-1,-1i,-1,1i,-1}; or the sequence of the first orthogonal sequence group includes the following sequence ：{-1,1i,-1,1i,1i,-1,-1i,1};{-1,-1i,-1,-1i,1i,1,-1i,-1};{-1,1i,1,-1i,1i,-1,1i,-1};{-1,-1i,1,1i,1i,1,1i,1};{-1,1i,-1,1i,-1i,1,1i,-1};{-1,-1i,-1,-1i,-1i,-1,1i,1};{-1,1i,1,-1i,-1i,1,-1i,1};{-1,-1i,1,1i,-1i,-1,-1i,-1}; or the sequence of the first orthogonal sequence group includes the following sequence ：{-1,1i,-1i,-1,-1,1i,1i,1};{-1,-1i,-1i,1,-1,-1i,1i,-1};{-1,1i,1i,1,-1,1i,-1i,-1};{-1,-1i,1i,-1,-1,-1i,-1i,1};{-1,1i,-1i,-1,1,-1i,-1i,-1};{-1,-1i,-1i,1,1,1i,-1i,1};{-1,1i,1i,1,1,-1i,1i,1};{-1,-1i,1i,-1,1,1i,1i,-1}; or the sequence of the first orthogonal sequence group includes the following sequence ：{-1,-1,1i,1i,-1i,1i,-1,1};{-1,1,1i,-1i,-1i,-1i,-1,-1};{-1,-1,-1i,-1i,-1i,1i,1,-1};{-1,1,-1i,1i,-1i,-1i,1,1};{-1,-1,1i,1i,1i,-1i,1,-1};{-1,1,1i,-1i,1i,1i,1,1};{-1,-1,-1i,-1i,1i,-1i,-1,1};{-1,1,-1i,1i,1i,1i,-1,-1}; and the sequence of the second orthogonal sequence group includes the following sequence: {1, 1}; {1, -1, -1}; {1, -1, -1}; {1, -1,1}; where i is an imaginary unit.

Wherein the local sequence cross-correlation of the sequences of the reference signal between the reference signal sequence sets is related to the sequences w _g,p (n) only, wherein the cross-correlation values between w _g,p (.)The cross-correlation is optimal. The local cross correlation of the reference signals can be optimally used for effectively resisting channel fading, and the channel estimation performance is improved.

Wherein the sequences in the second set of mask sequences include the following sequences: {1,1}; {1,1i }; where i is an imaginary unit.

Masking sequence c _g (·) enables sequences of reference signals between reference signal sequence groupsCross-correlation ofThe method can ensure that the overall cross correlation of the reference signals is optimal, can effectively resist channel fading, and can further improve the channel estimation performance.

In a second aspect, an embodiment of the present application further provides a signal receiving method, including: the method comprises the steps that a receiving end sends/receives a signaling, wherein the signaling carries a preset domain segment and indicates a first reference signal combination, and the first reference signal combination comprises one or more reference signals; wherein, different values of the preset domain segment in the signaling correspond to different reference signal combinations respectively; all reference signals included in the different reference signal combinations form a reference signal set, and the reference signal set comprises at least two reference signal groups; reference signal sequences for each reference signal in the at least two reference signal groupsSatisfy the following requirementsWherein M is an integer from 0 to M-1, M isIs a sequence length of (2); a is a non-zero complex number; r (m) is a pseudo-random sequence; wherein the length of the sequence w _g,p (DEG) is N _g, and the value range of the independent variables is 0,1, … and N _g -1; n satisfies n=mmod N _g, M is not less than 2N _g, g is the identity of the orthogonal sequence group, and the at least two reference signal groups satisfy the following conditions: reference signal sequences of all reference signals in the first reference signal groupThe corresponding orthogonal code sequences w _g,p (n) form a first orthogonal sequence group, and the reference signal sequences of all the reference signals in the second reference signal groupThe corresponding orthogonal code sequences w _g,p (·) constitute a second set of orthogonal sequences; traversing at least a first orthogonal sequence group and a second orthogonal sequence group; p traversing all sequences in the orthogonal sequence group; sequences in the first orthogonal sequence group are orthogonal to each other, sequences in the second orthogonal sequence group are orthogonal to each other, and any sequence in the first orthogonal sequence group and any sequence in the second orthogonal sequence group are different; wherein, Sequence c _g (·) is one sequence in the first set of mask sequences, and the range of self-variable values isThe sequence c _g (·) corresponding to the first orthogonal sequence set is different from the sequence c _g (·) corresponding to the second orthogonal sequence set; the sequence r (m) corresponding to the first sequence group is identical to the sequence r (m) corresponding to the second sequence group; the receiving end receives the one or more reference signals and processes the one or more reference signals according to at least one reference signal sequence.

By the embodiment of the application, the receiving end receives the sequence-based transmitted by the transmitting endA generated reference signal, wherein the sequenceThe corresponding orthogonal sequence w _g,p (·) is a sequence in at least a first orthogonal sequence group or a second orthogonal sequence group, the sequences in the first orthogonal sequence group are orthogonal to each other, the sequences in the second orthogonal sequence group are orthogonal to each other, and at the same time, any sequence in the first orthogonal sequence group is different from any sequence in the second orthogonal sequence group; and, the sequence c _g (·) corresponding to the first orthogonal sequence set is different from the sequence c _g (·) corresponding to the second orthogonal sequence set. In contrast to the prior art, the cross-correlation value between the sequence of the one or more reference signals and the sequence of the reference signal allocated by the other terminal device and not orthogonal to the sequence of the reference signal is independent of the scrambling sequence, so that the situation that the cross-correlation is poor due to the randomness of the scrambling code is avoided, and the cross-correlation value is only related to the sequence w _g,p(·)、c_g (). By adopting the scheme, the interference of pilot signals among different layers can be reduced, and the channel estimation performance can be improved.

As one implementation, the sequences of the first orthogonal sequence set include the following sequences: {1,1}; {1, -1}; the sequences of the second orthogonal sequence set include the following sequences: {1,1i }; {1, -1i }; or the sequences of the first orthogonal sequence set include the following sequences: {1,1i }; {1, -1i }; the sequences of the second orthogonal sequence set include the following sequences: {1,1}; {1, -1}; where i is an imaginary unit.

As yet another implementation, the sequence of the first orthogonal sequence group/second orthogonal sequence group includes the following sequence ：{-1i,-1,1i,-1,1i,-1,1i,1};{-1i,1,1i,1,1i,1,1i,-1};{-1i,-1,-1i,1,1i,-1,-1i,-1};{-1i,1,-1i,-1,1i,1,-1i,1};{-1i,-1,1i,-1,-1i,1,-1i,-1};{-1i,1,1i,1,-1i,-1,-1i,1};{-1i,-1,-1i,1,-1i,1,1i,1};{-1i,1,-1i,-1,-1i,-1,1i,-1}; or the sequence of the first orthogonal sequence group/second orthogonal sequence group includes the following sequence ：{1i,-1i,-1,-1,1i,1i,-1,1};{1i,1i,-1,1,1i,-1i,-1,-1};{1i,-1i,1,1,1i,1i,1,-1};{1i,1i,1,-1,1i,-1i,1,1};{1i,-1i,-1,-1,-1i,-1i,1,-1};{1i,1i,-1,1,-1i,1i,1,1};{1i,-1i,1,1,-1i,-1i,-1,1};{1i,1i,1,-1,-1i,1i,-1,-1}; or the sequence of the first orthogonal sequence group/second orthogonal sequence group includes the following sequence ：{1i,1i,1i,-1i,-1,-1,-1,1};{1i,-1i,1i,1i,-1,1,-1,-1};{1i,1i,-1i,1i,-1,-1,1,-1};{1i,-1i,-1i,-1i,-1,1,1,1};{1i,1i,1i,-1i,1,1,1,-1};{1i,-1i,1i,1i,1,-1,1,1};{1i,1i,-1i,1i,1,1,-1,1};{1i,-1i,-1i,-1i,1,-1,-1,-1}; or the sequence of the first orthogonal sequence group/second orthogonal sequence group includes the following sequence ：{-1,1i,-1,1i,1i,-1,-1i,1};{-1,-1i,-1,-1i,1i,1,-1i,-1};{-1,1i,1,-1i,1i,-1,1i,-1};{-1,-1i,1,1i,1i,1,1i,1};{-1,1i,-1,1i,-1i,1,1i,-1};{-1,-1i,-1,-1i,-1i,-1,1i,1};{-1,1i,1,-1i,-1i,1,-1i,1};{-1,-1i,1,1i,-1i,-1,-1i,-1}; or the sequence of the first orthogonal sequence group/second orthogonal sequence group includes the following sequence ：{1i,-1,-1,1i,-1,-1i,1i,1};{1i,1,-1,-1i,-1,1i,1i,-1};{1i,-1,1,-1i,-1,-1i,-1i,-1};{1i,1,1,1i,-1,1i,-1i,1};{1i,-1,-1,-1,1i,1,1i,-1i,-1};{1i,1,-1,-1i,1,-1i,-1i,1};{1i,-1,1,-1i,1,1i,1i,1};{1i,1,1,1i,1,-1i,1i,-1}; or the sequence of the first orthogonal sequence group/second orthogonal sequence group includes the following sequence ：{-1,1i,-1i,-1,-1,1i,1i,1};{-1,-1i,-1i,1,-1,-1i,1i,-1};{-1,1i,1i,1,-1,1i,-1i,-1};{-1,-1i,1i,-1,-1,-1i,-1i,1};{-1,1i,-1i,-1,1,-1i,-1i,-1};{-1,-1i,-1i,1,1,1i,-1i,1};{-1,1i,1i,1,1,-1i,1i,1};{-1,-1i,1i,-1,1,1i,1i,-1}; or the sequence of the first orthogonal sequence group/second orthogonal sequence group includes the following sequence ：{-1,-1,1i,1i,-1i,1i,-1,1};{-1,1,1i,-1i,-1i,-1i,-1,-1};{-1,-1,-1i,-1i,-1i,1i,1,-1};{-1,1,-1i,1i,-1i,-1i,1,1};{-1,-1,1i,1i,1i,-1i,1,-1};{-1,1,1i,-1i,1i,1i,1,1};{-1,-1,-1i,-1i,1i,-1i,-1,1};{-1,1,-1i,1i,1i,1i,-1,-1}; or the sequence of the first orthogonal sequence group/second orthogonal sequence group includes the following sequence ：{1,1,1,1,1,1,1,1};{1,-1,1,-1,1,-1,1,-1};{1,1,-1,-1,1,1,-1,-1};{1,-1,-1,1,1,-1,-1,1};{1,1,1,1,-1,-1,-1,-1};{1,-1,1,-1,-1,1,-1,1};{1,1,-1,-1,-1,-1,1,1};{1,-1,-1,1,-1,1,1,-1};, wherein i is an imaginary unit.

Wherein the sequences in the second set of mask sequences include the following sequences: {1,1}; {1,1i }; where i is an imaginary unit. Wherein the mask sequence c _g (t) is such that the sequences of reference signals between the reference signal sequence groupsCross-correlation ofThe method can ensure that the overall cross correlation of the reference signals is optimal, can effectively resist channel fading, and can further improve the channel estimation performance.

In a third aspect, the present application also provides a communication apparatus comprising: a transceiver unit, configured to receive/send a signaling, where the signaling carries a preset field segment and indicates a first reference signal combination, where the first reference signal combination includes one or more reference signals; wherein, different values of the preset domain segment in the signaling correspond to different reference signal combinations respectively; all reference signals included in the different reference signal combinations form a reference signal set, and the reference signal set comprises at least two reference signal groups; reference signal sequences for each reference signal in the at least two reference signal groupsSatisfy the following requirementsWherein M is an integer from 0 to M-1, M isIs a sequence length of (2); a is a non-zero complex number; r (m) is a pseudo-random sequence; wherein the length of the sequence w _g,p (DEG) is N _g, and the value range of the independent variable is 0,1, … and N _g -1.N satisfies n=mmod N _g, M is not less than 2N _g, g is the identity of the orthogonal sequence group, and the at least two reference signal groups satisfy the following conditions: reference signal sequences of all reference signals in the first reference signal groupThe corresponding orthogonal code sequences w _g,p (·) form a first orthogonal sequence group, the reference signal sequences of all reference signals in the second reference signal groupThe corresponding orthogonal code sequences w _g,p (·) constitute a second set of orthogonal sequences; traversing at least a first orthogonal sequence group and a second orthogonal sequence group; p traversing all sequences in the orthogonal sequence group; sequences in the first orthogonal sequence group are orthogonal to each other, sequences in the second orthogonal sequence group are orthogonal to each other, and any sequence in the first orthogonal sequence group and any sequence in the second orthogonal sequence group are different; wherein, Sequence c _g (·) is one sequence in the first set of mask sequences, and the range of self-variable values isThe sequence c _g (·) corresponding to the first orthogonal sequence set is different from the sequence c _g (·) corresponding to the second orthogonal sequence set; the sequence r (m) corresponding to the first sequence group is identical to the sequence r (m) corresponding to the second sequence group; and a processing unit, configured to generate and send the one or more reference signals.

In a fourth aspect, the present application also provides a communication apparatus, including: a transceiver unit, configured to send/receive a signaling, where the signaling carries a preset field segment and indicates a first reference signal combination, where the first reference signal combination includes one or more reference signals; wherein, different values of the preset domain segment in the signaling correspond to different reference signal combinations respectively; all reference signals included in the different reference signal combinations form a reference signal set, and the reference signal set comprises at least two reference signal groups; reference signal sequences for each reference signal in the at least two reference signal groupsSatisfy the following requirementsWherein M is an integer from 0 to M-1, M isIs a sequence length of (2); a is a non-zero complex number; r (m) is a pseudo-random sequence; wherein the length of the sequence w _g,p (·) is N _g, N satisfies n=mmod N _g, M is not less than 2N _g, g is the identity of the orthogonal sequence group, and the at least two reference signal groups satisfy the following conditions: reference signal sequences of all reference signals in the first reference signal groupThe corresponding orthogonal code sequences w _g,p (·) form a first orthogonal sequence group, the reference signal sequences of all reference signals in the second reference signal groupThe corresponding orthogonal code sequences w _g,p (·) constitute a second set of orthogonal sequences; traversing at least a first orthogonal sequence group and a second orthogonal sequence group; p traversing all sequences in the orthogonal sequence group; sequences in the first orthogonal sequence group are orthogonal to each other, sequences in the second orthogonal sequence group are orthogonal to each other, and any sequence in the first orthogonal sequence group and any sequence in the second orthogonal sequence group are different; wherein, Sequence c _g (·) is one sequence in the first set of mask sequences, and the range of self-variable values isThe sequence c _g (·) corresponding to the first orthogonal sequence set is different from the sequence c _g (·) corresponding to the second orthogonal sequence set; the sequence r (m) corresponding to the first sequence group is identical to the sequence r (m) corresponding to the second sequence group; and the processing unit is used for receiving the one or more reference signals and processing the one or more reference signals according to at least one reference signal sequence.

In a fifth aspect, the application provides a computer storage medium comprising computer instructions which, when run on an electronic device, cause the electronic device to perform a method as provided by any one of the possible implementations of the first aspect and/or any one of the possible implementations of the second aspect.

In a sixth aspect, the present embodiments provide a computer program product which, when run on a computer, causes the computer to perform the method as provided by any one of the possible implementations of the first aspect and/or any one of the possible implementations of the second aspect.

It will be appreciated that the apparatus of the third aspect, the apparatus of the fourth aspect, the computer storage medium of the fifth aspect or the computer program product of the sixth aspect provided above are each adapted to perform the method provided in any one of the first aspect and the method provided in any one of the second aspect. Therefore, the advantages achieved by the method can be referred to as the advantages of the corresponding method, and will not be described herein.

Drawings

In order to more clearly describe the embodiments of the present application or the technical solutions in the background art, the following will briefly describe the drawings related to the embodiments of the present application or the background art.

FIG. 1 is a schematic diagram of a prior art resource block;

fig. 2a is a schematic diagram of a pilot pattern of a DMRS employing configuration type 1 in the prior art;

Fig. 2b is a schematic diagram of another pilot pattern employing DMRS of configuration type 1 in the prior art;

fig. 3a is a schematic diagram of a pilot pattern of a DMRS employing configuration type 2 in the prior art;

Fig. 3b is a schematic diagram of another pilot pattern employing a DMRS of configuration type 2 in the prior art;

fig. 4 is a cumulative distribution diagram of cross-correlation between DMRS sequences in the prior art;

FIG. 5a is a schematic diagram of a communication system according to an embodiment of the present application;

Fig. 5b is a schematic flow chart of a signal sending method according to an embodiment of the present application;

fig. 5c is a flowchart of another signal transmission method according to an embodiment of the present application;

fig. 6a is a schematic diagram of mapping a reference signal sequence to a time-frequency resource according to an embodiment of the present application;

Fig. 6b is a schematic diagram of mapping another reference signal sequence to a time-frequency resource according to an embodiment of the present application;

Fig. 7a is a schematic diagram of placement of an orthogonal code sequence according to an embodiment of the present application;

fig. 7b is a schematic diagram of another orthogonal code sequence placement provided in an embodiment of the present application;

FIG. 8 is a schematic diagram of mask sequence placement according to an embodiment of the present application;

FIG. 9 is a schematic diagram of a partial sequence provided by an embodiment of the present application;

Fig. 10a is a schematic diagram of placement of an orthogonal code sequence according to an embodiment of the present application;

Fig. 10b is a schematic diagram of another orthogonal code sequence placement provided in an embodiment of the present application;

FIG. 11a is a schematic diagram of mask sequence placement according to an embodiment of the present application;

FIG. 11b is a schematic diagram of another mask sequence placement provided by an embodiment of the present application;

fig. 12 is a schematic diagram of placement of an orthogonal code sequence according to an embodiment of the present application;

FIG. 13 is a schematic diagram of mask sequence placement according to an embodiment of the present application;

Fig. 14 is a schematic diagram of mapping a reference signal sequence to a time-frequency resource according to an embodiment of the present application;

fig. 15 is a schematic view of a signaling method according to an embodiment of the present application;

Fig. 16a is a schematic flow chart of a signal receiving method according to an embodiment of the present application;

FIG. 16b is a schematic diagram of a communication device according to an embodiment of the present application;

fig. 17 is a schematic diagram of another communication device according to an embodiment of the present application.

Detailed Description

In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.

The following describes related art according to an embodiment of the present application:

1. resource BLOCK (RB)

In the radio resource, the smallest resource granularity in the time domain may be one orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) symbol (symbol), which may be simply referred to as symbol (symbol), and one slot includes a plurality of symbols; in the frequency domain, the smallest resource granularity may be one subcarrier. One OFDM symbol and one subcarrier constitute one Resource Element (RE). The physical layer uses RE as a basic unit when performing resource mapping. An RB is a frequency domain basic scheduling unit of data channel allocation, and one RB includes 12 subcarriers in the frequency domain.

2. Demodulation reference signal (demodulation REFERENCE SIGNAL, DMRS)

Currently, in a communication system, DMRS is used for uplink/downlink channel estimation. For example, a physical downlink shared channel (physical downlink SHARED CHANNEL, PDSCH) or a Physical Uplink Shared Channel (PUSCH) may be channel estimated using the DMRS to coherently demodulate uplink/downlink data. The PDSCH and PUSCH are used for carrying downlink and uplink data, and the DMRS is transmitted along with the PDSCH or PUSCH. Typically the DMRS is located in the first few symbols of the slot occupied by the PDSCH or PUSCH.

In the uplink and downlink transmission process, a certain number of parallel data streams are distributed for each scheduled UE according to factors such as channel conditions of each User Equipment (UE), wherein each data stream is called a layer of transmission. Taking a 5G New Radio (NR) system as an example, downlink single user multiple input multiple output (SU-MIMO) supports 8 layers of transmission at most; uplink SU-MIMO supports up to 4 layers of transmission. Uplink and downlink multi-user multiple-input multiple-output (MU-MIMO) supports up to 12 layers of transmission. Wherein, each layer of transmission can respectively correspond to one DMRS.

The precoding vector of each DMRS is the same as the precoding vector of the data stream of the corresponding layer, and the receiving end needs to perform channel estimation according to each DMRS. Wherein different DMRSs correspond to different indexes, the indexes here may be DMRS port numbers.

When the uplink and downlink communications employ cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) waveforms, the DMRS may be generated using a pseudo-random sequence. Specifically, the scrambling sequence r (m) of the DMRS may be obtained by modulating a sequence c (m) through Quadrature Phase Shift Keying (QPSK), and c (m) may be defined as a Gold sequence, which is one of pseudo-random sequences. r (m) can be expressed as:

wherein,

c(m)＝(x₁(m+N_C)+x₂(m+N_C))mod 2

x₁(m+31)＝(x₁(m+3)+x₁(m))mod 2

x₂(m+31)＝(x₂(m+3)+x₂(m+2)+x₂(m+1)+x₂(m))mod 2

Wherein N _C＝1600,x₁ (m) can be initialized to x ₁(0)＝1,x₁(m)＝0,m＝1,2,…,30,x₂ (m) satisfiesTaking PUSCH DMRS as an example, c _init is determined by DMRS scrambling code identification (Identity document, ID), cell ID, subframe position and symbol position of DMRS, and other information.

In the multi-layer transmission, each layer multiplexes the same time-frequency resource, and each DMRS shares the same scrambling sequence r (m). In addition, in order to ensure orthogonality between the transmissions of the layers, orthogonal codes (orthogonal cover code, OCC) corresponding to the transmissions of the layers need to be superimposed on the scrambling code sequence.

Specifically, in the case of multiplexing the same time-frequency resource with multiple layers of transmission, different DMRSs are divided into different code division multiplexing (code division multiplexing, CDM) groups (groups) in the frequency domain according to the configuration type adopted by the DMRSs. For example, two DMRS configuration types, configuration type 1 and configuration type 2, may be supported in the NR. The DMRS in the same CDM group are spread on the time-frequency domain by using orthogonal codes, orthogonality of different DMRS is guaranteed, and the DMRS are mutually orthogonal by adopting a frequency division mode among different CDM groups.

Taking PUSCH DMRS using CP-OFDM waveforms as an example, fig. 2a and fig. 2b are schematic diagrams of pilot patterns using DMRS of configuration type 1. When one symbol is configured for DMRS, resource Elements (REs) of two patterns in fig. 2a represent REs occupied by CDM group 0 and CDM group 1, and p0, p1, p2, and p3 represent DMRS port numbers, respectively. Wherein, within the same CDM group, an orthogonal code is adopted to ensure that two DMRS within the same CDM group are orthogonal. And a frequency division mode is adopted among different CDM groups to ensure that the DMRS among the different CDM groups are mutually orthogonal. When the DMRS configuration adopts type 1 and the DMRS configuration is one symbol, the system supports a maximum of 4 DMRS orthogonality.

When two symbols are configured for DMRS, REs of the two patterns in fig. 2b represent REs occupied by CDM group 0 and CDM group 1, p0, p1, …, p6, and p7 represent DMRS port numbers, respectively. Wherein, within the same CDM group, an orthogonal code is adopted to ensure that 4 DMRS within the same CDM group are orthogonal. When the DMRS configuration adopts type 1 and the DMRS configuration is two symbols, the system supports 8 DMRS orthogonality at maximum.

For another example, fig. 3a and 3b are schematic diagrams of pilot patterns using DMRS of configuration type 2. When one symbol is configured for DMRS, REs of three patterns in fig. 3a represent REs occupied by three CDM groups, and p0, p1, p2, … p4, and p5 represent DMRS port numbers, respectively. In the same CDM group, an orthogonal code with a code length of 2 is adopted to ensure that two DMRS in the same CDM group are orthogonal. When type 2 is employed and DMRS is configured for one symbol, the system supports a maximum of 6 DMRSs orthogonality.

When two symbols are configured for DMRS, REs of the three patterns in fig. 3b represent REs occupied by three CDM groups, respectively, and p0, p1, p2, … p10, and p11 represent DMRS port numbers, respectively. In the same CDM group, four DMRS orthogonality in the same CDM group is ensured by adopting an orthogonal code with a code length of 4. It can be seen that when type 2 is employed and DMRS is configured for two symbols, the system supports a maximum of 12 DMRSs orthogonal.

In addition, in uplink or downlink transmission, the base station needs to instruct the UE of DMRS allocation through downlink control information (Downlink Control Information, DCI) in a physical downlink control channel (Physical Downlink Control Channel, PDCCH). In some cases, in order to support the joint reception algorithm in MU-MIMO to better suppress interference, it is necessary to indicate not only the DMRS allocation of each scheduled UE itself, but also the DMRS allocation of the UE co-scheduled therewith in DCI.

Currently, with the development of mobile communication, it is required to increase system performance by increasing the number of transmission layers of network pairing. As can be seen from the description of the related art, the number of transmission layers of the network pairing is limited by the number of orthogonal DMRS that is maximally supported by the system.

In order to avoid the limitation of the number of transmission layers paired by the network by the number of orthogonal DMRS supported by the system at the maximum, in the prior art, a mode of using multiple scrambling sequences is generally adopted to achieve the purpose of expanding the number of DMRS, taking CDM group 0 as an example in the pilot diagram of fig. 2b, the scrambling sequences of DMRS of ports p0, p1, p4 and p5 are the same, and are assumed to be r ₀ (m), another scrambling code r1 (m) is introduced, and after OCC is overlapped, the DMRS of ports p0', p1', p4 'and p5' are expanded. The DMRSs of ports p0, p1, p4, p5 and the DMRSs of ports p0', p1', p4', p5' are not orthogonal to each other due to the use of different scrambling codes.

FIG. 4 is a graph showing the cumulative distribution (Cumulative Distribution Function, CDF) of cross-Correlation (CDS) among 48-length DMRS sequences obtained by randomly selecting 2000 scrambling sequences r ₀(m)-r₁₉₉₉ (m) according to the scrambling code generation formula of Release15/16 (r 15/16) protocol, wherein each scrambling code is superimposed with 4 OCCs to obtain 4 orthogonal DMRS sequences, the DMRS sequences obtained by different scrambling codes are not orthogonal, and the maximum cross-correlation value between the DMRS sequences obtained by two different scrambling codes is used as the statistical result in FIG. 4, and the cross-correlation value of two N-length non-orthogonal sequences { a _n}、{b_n } is defined asWherein, the scrambling code initialization formula is as follows:

Wherein the method comprises the steps of As the number of symbols in a time slot,For a subframe index, l is a symbol index,Is the scrambling code ID. As can be seen from the scrambling code initialization formula c _init, different scrambling codes are generated not only depending on the scrambling code ID, but also depending on the symbol position, so that the scrambling code selection randomness is large, resulting in a large cross-correlation value variation range, and a large cross-correlation value can cause a large interference ratio between non-orthogonal DMRS, thereby seriously affecting the channel estimation performance.

Therefore, the present solution provides a signal transmission method to solve the above-mentioned problems.

Referring to fig. 5a, a schematic diagram of a communication system according to an embodiment of the present application is provided. The communication system may comprise one or more network devices 10 (only 1 is shown) and one or more terminal devices UE connected to the network devices 10.

The network device 10 may be a device capable of communicating with a terminal device. The network device 10 may be any device having a wireless transceiving function. Including but not limited to: base stations NodeB, evolved base stations eNodeB, base stations in the fifth generation (the fifth generation, 5G) communication system, base stations or network equipment in future communication systems, access nodes in WiFi systems, wireless relay nodes, wireless backhaul nodes, etc. The network device 10 may also be a wireless controller in the context of a cloud wireless access network (cloud radio access network, CRAN). The network device 10 may also be a small station, a transmission reference node (transmission reference point, TRP), or the like. The embodiment of the application does not limit the specific technology and the specific equipment form adopted by the network equipment.

The terminal equipment is equipment with a wireless receiving and transmitting function, can be deployed on land, and comprises indoor or outdoor, handheld, wearable or vehicle-mounted; the device can also be deployed on the water surface, such as a ship, etc.; but also can be deployed in the air, such as on an airplane, a balloon, a satellite, etc. The terminal device may be a mobile phone, a tablet (Pad), a computer with wireless transceiving function, a Virtual Reality (VR) terminal device, an augmented Reality (Augmented Reality, AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in unmanned (SELF DRIVING), a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid (SMART GRID), a wireless terminal in transportation security (transportation safety), a wireless terminal in smart city (SMART CITY), a wireless terminal in smart home (smart home), etc. The embodiment of the application does not limit the application scene. A terminal device may also be referred to as a terminal device (UE), an access terminal device, a UE unit, a mobile station, a remote terminal device, a mobile device, a terminal (terminal), a wireless communication device, a UE agent, a UE apparatus, or the like.

The technical scheme provided by the embodiment of the application can be applied to various communication systems, such as communication systems adopting NR technology, long term evolution (long term evolution, LTE) technology or other wireless access technologies.

It should be noted that the terms "system" and "network" in embodiments of the present invention may be used interchangeably. "plurality" means two or more, and "plurality" may also be understood as "at least two" in this embodiment of the present invention. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a exists alone, A and B exist together, and B exists alone. The character "/", unless otherwise specified, generally indicates that the associated object is an "or" relationship.

The application is applicable to both upstream (terminal device to network device) and downstream (network device to terminal device) communications in a communication system.

Referring to fig. 5b, a flowchart of a signal sending method according to an embodiment of the present application is shown. The method may include steps 501-503, specifically as follows:

501. the network device sends a first instruction.

The network device may be an access network device, or the network device may be a network element in the core network capable of performing information interaction with the terminal device.

Wherein the first signaling includes a preset field segment indicating a first reference signal combination. The first reference signal combination includes at least one reference signal.

The values of the preset domain segments included in the first signaling are different and correspond to the reference signal combinations respectively. That is, in the case that different values are assigned to the preset domain segments included in the first signaling, the first signaling may correspond to different reference signal combinations. Furthermore, the network device may send a first signaling with different values of the preset domain segment, and instruct the receiving end device of different reference signal combinations.

Specifically, the first signaling may be downlink control information (downlink control information, DCI). Each reference signal combination may be a combination of DMRS.

All reference signals included in the different reference signal combinations described above constitute a reference signal set (for convenience of distinguishing the reference signal set from other reference signal sets, the reference signal set will be hereinafter referred to as "first reference signal set"). For example, the different reference signal combinations described above include combination 1, combination 2, and combination 3. Wherein, the combination 1 comprises a reference signal a and a reference signal b; the combination 2 comprises a reference signal c, a reference signal d and a reference signal e; the combination 3 includes a reference signal f and a reference signal g. Then, the first reference signal set includes a reference signal a, a reference signal b, a reference signal c, a reference signal d, a reference signal e, a reference signal f, and a reference signal g. In addition, there may be intersections of reference signals in different reference signal combinations. For example, each reference signal combination includes a combination 1 and a combination 2, wherein the combination 1 includes a reference signal h, and the combination 2 includes a reference signal h and a reference signal i. The first reference signal set includes a reference signal h and a reference signal i.

Wherein the first set of reference signals comprises at least two reference signal groups. Reference signal sequences for reference signals in at least two reference signal groupsThe method meets the following conditions:

wherein r (m) is a pseudo-random sequence. For example, when the first reference signal set is a DMRS set, r (m) is a scrambling sequence of the DMRS.

Wherein m=0, 1,2 …. When referring to signal sequenceWhere m=0, 1,2 … M-1. Wherein the sequenceThe sequence length of (a) may be that the base station informs the terminal device by sending signaling, etc.

A is a non-zero complex constant; in the specific implementation process, a person skilled in the art can give the value of a according to the need. For example, a may refer to a power control factor, and a technician may determine a value of a according to a transmit power of a device transmitting a reference signal. That is, the value of a may not be limited in the embodiment of the present application.

The length of the sequence w _g,p (·) is N _g, the range of values of the argument is 0,1, …, N _g -1, N satisfies n=m mod N _g. The sequence isThe sequence length M of (2) is not less than 2N _g. For example, when the first reference signal set is a DMRS set, the orthogonal code sequence w _g,p (·) may be an OCC of each DMRS.

Sequence c _g (·) is a mask sequence,The sequence c _g (DEG) can be one sequence in the first mask sequence set, and the self-variable value range is thatThat is, the length of the sequence c _g (. Cndot.) isThe lower-order of the representation is rounded,The representation is rounded up. Hereinafter, the description will not be repeated.

In addition, any two reference signal groups of the at least two reference signal groups, taking the first reference signal group and the second reference signal group as examples, satisfy the following conditions:

reference signal sequences of all reference signals in the first reference signal group The corresponding orthogonal sequences w _g,p (·) form a first sequence set, the reference signal sequences of all reference signals in the second reference signal setThe corresponding orthogonal sequences w _g,p (·) make up the second sequence set. g is the identification of an orthogonal sequence group, and the g traverses at least a first orthogonal sequence group and a second orthogonal sequence group; p traverses all sequences in the orthogonal sequence set. The step g of traversing at least the first orthogonal sequence group and the second orthogonal sequence group means that the value range of g at least comprises the first orthogonal sequence group and the second orthogonal sequence group. The above description is given by taking the first orthogonal sequence group and the second orthogonal sequence group as examples, and the present invention is not limited to this, and may further include a third orthogonal sequence group, a fourth orthogonal sequence group, and the like. Correspondingly, the p traverses all sequences in the orthogonal sequence group, that is, the value range of p corresponds to all sequences in the orthogonal sequence group.

The sequences in the first orthogonal sequence group are orthogonal to each other, the sequences in the second orthogonal sequence group are orthogonal to each other, and any one of the sequences in the first orthogonal sequence group and any one of the sequences in the second orthogonal sequence group are different.

The sequence w _g,p (·) is an orthogonal sequence, which is a sequence in the first orthogonal sequence group or the second orthogonal sequence group. Of course, when there are at least 3 orthogonal sequence groups, the sequence w _g,p (·) may be a sequence in a third orthogonal sequence group, and the embodiment will be described by taking only the first orthogonal sequence group and the second orthogonal sequence group as an example.

The sequence c _g (·) corresponding to the first orthogonal sequence set is different from the sequence c _g (·) corresponding to the second orthogonal sequence set. Specifically, the sequences w _g,p (·) of the same orthogonal sequence set correspond to the same c _g (·) and the sequences of different orthogonal sequence sets correspond to the same c _g (·).

502. The terminal equipment receives a first instruction.

In an embodiment, when the method provided by the embodiment of the present application is applied to a scenario in which the network device sends an instruction (for example, may be downlink control information (downlink control information, DCI)) to the terminal device, so that the terminal device determines, according to the instruction, a reference signal to be sent (for example, may be a DMRS to be sent), and then the terminal device sends the reference signal to be sent, the method further includes:

503. the terminal device transmits at least one reference signal to cause the network device to receive the at least one reference signal.

After receiving the first instruction, the terminal device can determine at least one reference signal in the first reference signal combination according to the value of the preset domain segment in the first instruction, and then send the at least one reference signal.

Exemplary, the terminal device stores therein the reference signal sequence of each reference signal in the first reference signal setCorrelation information of the corresponding orthogonal code sequence w _g,p (·). Then, after determining at least one reference signal according to the first instruction, the terminal device may determine an orthogonal code sequence w _g,p (·) corresponding to at least one reference signal in the orthogonal code sequences w _g,p (·) and obtain a reference signal sequence of the at least one reference signal, so as to transmit the at least one reference signal.

Of course, the terminal device may not store the orthogonal code sequences corresponding to the reference signal sequences of the reference signals in the first reference signal set in advance, but may directly generate the orthogonal code sequences corresponding to the at least one reference signal according to the correlation information, for example, the rule of the orthogonal code sequences corresponding to the reference signal sequences of the reference signals in the first reference signal set. The value of the preset segment field in the first instruction indicates the index of the reference signal in the first reference signal set, the terminal device needs to generate a reference signal sequence corresponding to the index according to the correlation rule, and needs to know which reference signal sequence corresponds to the orthogonal code sequence to generate the reference signal sequence. Specifically, the present application may not be limited to the manner in which the terminal device obtains the reference signal sequence of at least one reference signal.

For example, the reference signal sequences of at least one reference signal may be mapped to M REs, respectively, and the first signal may be generated and transmitted.

When the method provided by the embodiment of the present application is applied to a scenario in which the network device sends an instruction (for example, may be downlink control information (downlink control information, DCI)) to the terminal device, so that the terminal device determines, according to the instruction, a reference signal (for example, may be DMRS) to be sent by the network device, and then the terminal device receives the reference signal, as shown in fig. 5c, the method includes steps 501'-503', specifically including:

501', the network device sends a first instruction.

502', The terminal device receives the first instruction.

503', The network device transmits at least one reference signal, and the terminal device receives the at least one reference signal.

The network device may store in advance orthogonal code sequences corresponding to the reference signal sequences of the reference signals in the first reference signal set. Then, after determining at least one reference signal to be transmitted, the network device may select an orthogonal code sequence corresponding to the at least one reference signal from the stored orthogonal code sequences, and obtain a reference signal sequence of the at least one reference signal according to the formula one, so as to transmit the at least one reference signal. Specifically, the network device may map the reference signal sequences of at least one reference signal onto M REs, respectively, generate a first signal, and send the first signal.

In addition, after receiving the first instruction, the terminal device can determine at least one reference signal in the first reference signal combination according to the value of the preset domain segment in the first instruction. Further, the terminal device may process a first signal from the network device comprising at least one reference signal to evaluate the channel on which the reference signal is located.

By the embodiment of the application, the transmitting end is based on the sequenceGenerating a reference signal, wherein the sequenceThe corresponding orthogonal sequence w _g,p (·) is a sequence in at least a first orthogonal sequence group or a second orthogonal sequence group, the sequences in the first orthogonal sequence group are orthogonal to each other, the sequences in the second orthogonal sequence group are orthogonal to each other, and at the same time, any sequence in the first orthogonal sequence group is different from any sequence in the second orthogonal sequence group; and, the sequence c _g (·) corresponding to the first orthogonal sequence set is different from the sequence c _g (·) corresponding to the second orthogonal sequence set. In contrast to the prior art, the cross-correlation value between the sequence of the one or more reference signals and the sequence of the reference signal allocated by the other terminal device and not orthogonal to the sequence of the reference signal is independent of the scrambling sequence, so that the situation that the cross-correlation is poor due to the randomness of the scrambling code is avoided, and the cross-correlation value is only related to the sequence w _g,p(·)、c_g (). Therefore, when the signal transmission method provided by the scheme is adopted for multi-layer transmission, the interference of pilot signals between different layers can be reduced, and the channel estimation performance can be improved.

Reference signal sequences provided by embodiments of the present application are described in detail below.

As a first implementation, the specific sequence w _g,p (. Cndot.) is described below. When the length of the sequence corresponding to the first orthogonal sequence group is the same as the length of the sequence corresponding to the second orthogonal sequence group, for example, the sequence length N _g of the first orthogonal sequence group may be 2, including the following sequences: {1,1}; {1, -1}; the second orthogonal sequence set may have a sequence length N _g of 2, including the following sequences: {1,1i }; {1, -1i }.

The specific sequence obtaining manner in the implementation manner may be:

each orthogonal sequence group obtains all sequences in the orthogonal sequence group according to a base sequence, the base sequence is { x ₀,x₁ }, each item of 2-length Walsh codes { w ₀,w₁ } is multiplied by each item of 2-length Walsh codes { x ₀w₀,x₁w₁ }, which can be expressed as S= { x ₀w₀,x₁w₁ }, wherein { w ₀,w₁ } is any one of {1,1}, {1, -1}, and the base sequence is {1,1}, wherein Each row of which represents a sequence, the latter of which is similar, the following sequence can be obtained by the above formula: {1,1}; {1, -1}.

The base sequence is {1, i }, whereThe following sequence can be obtained by the above formula: {1,1i }; {1, -1i }.

That is, the length-2 sequence w _g,p (·) may be the sequence {1,1} in the first orthogonal sequence group, or may be the sequence {1, -1} in the first orthogonal sequence group; it may also be the sequence {1,1i } in the second orthogonal sequence set, or the sequence {1, -1i } in the second orthogonal sequence set.

Or the sequences of the first orthogonal sequence set include the following sequences: {1,1i }; {1, -1i }; the sequences of the second orthogonal sequence set include the following sequences: {1,1}; {1, -1}.

Two sequences in the first orthogonal sequence group are orthogonal to each other, and two sequences in the second orthogonal sequence group are orthogonal to each other.

For example, in accordance with a reference signal sequenceIn the process of generating the reference signals, the first items of the sequences of the reference signals in the at least two reference signal groups are mapped on the same RE, the second items are also mapped on the same RE, and so on.

The manner in which the reference signal sequences corresponding to the sequences of the first orthogonal sequence group and the reference signal sequences corresponding to the sequences of the second orthogonal sequence group are mapped to the time-frequency resource is shown in fig. 6 a. Wherein, the subcarriers are numbered s+0, s+1, s+2, etc., s is any integer,Mapped on the subcarrier s +0,Mapping on subcarrier s+2, only mapping on one resource block RB is shown in fig. 6a, where the mapping manner of other RBs is similar.

As another implementation, the manner in which the reference signal sequence corresponding to the sequence of the first orthogonal sequence group and the reference signal sequence corresponding to the sequence of the second orthogonal sequence group are mapped to the time-frequency resource is shown in fig. 6 b. Wherein, Mapped on the subcarrier s +1,Mapping on subcarrier s+3, only mapping on one resource block RB is shown in fig. 6b, and the mapping manner of other RBs is similar.

Wherein the orthogonal code sequences of the corresponding reference signals in each reference signal group correspond to the same RE, as shown in fig. 7a and 7 b. It should be noted that the placement order of the respective items of the orthogonal code sequences in fig. 7a and 7b is only an exemplary order. In the specific implementation process, different placement sequences can be adopted according to the needs. The sequences w (0) and w (1) shown in fig. 7a and fig. 7b may be sequences w _g,p (·) in the first orthogonal sequence group, and the sequences w (0) and w (1) may also be sequences w _g,p (·) in the second orthogonal sequence group. The present embodiment is not particularly limited thereto.

Wherein the mask sequences of the corresponding reference signals in each reference signal group correspond to the positions shown in fig. 8. The mask sequences c (0), c (1) and c (2) shown in fig. 8 may be mask sequences corresponding to the first orthogonal sequence group or mask sequences corresponding to the second orthogonal sequence group. Wherein the mask sequence corresponding to the first orthogonal sequence group is different from the mask sequence corresponding to the second orthogonal sequence group.

Wherein, the 2 long partial sequence cross correlation of the sequences of the reference signals among the reference signal sequence groups is only related to the sequence w _g,p (), and the 2 long partial sequence refers to the sequence of the reference signal corresponding to any multiple orthogonal codes, such as the partial sequence shown in fig. 9As another example, the partial sequence shown in FIG. 9Etc. Wherein the cross correlation values among the orthogonal sequence groups w _g,p (DEG) are allThe cross-correlation is optimal. The optimal sequence cross-correlation is that the cross-correlation value of two N long non-orthogonal sequences { alpha _n}、{b_n }, isThe local cross correlation of the reference signals can be optimally used for effectively resisting channel fading, and the channel estimation performance is improved.

Alternatively, the sequence c _g (·) may satisfy:

wherein e _g denotes a sequence of length L, Represents the alpha-time Cronecker product of e _g, and alpha satisfiesAnd e _g corresponding to the plurality of reference signal sequences form a second mask sequence set, wherein L is a positive integer.

E _g can take different sequences, e.g., low cross-correlation sequences, and can yield different low cross-correlation c _g (.

For example, when L is 2, the sequences in the second set of mask sequences include the following sequences: {1,1}; {1,1i }.

For example, when α is 3, e _g is {1,1i }, then

When α is 3, e _g is {1,1i }, then

For example, when L is 4, e _g can take {1, 1}; {1, -1, -1}; {1, -1, -1}; one of {1, -1,1} and the other e _g takes {1, -1, -1i, -1i }; {1, -1i,1i }; {1, -1,1i }; one of {1, 1i, -1i }. In general terms, the process of the present invention,A sequence may not be L in length. When c _init and e _g were taken separately, different c _g (·) was obtained.

Sequence c _g (t) is such that the sequences of reference signals between the reference signal sequence groupsCross-correlation ofThat is, the overall cross-correlation of the reference signal is guaranteed to be optimal, and the cross-correlation for any N _g·L^v long local sequence isAnd is also optimal, wherein v=0, 1,2 … can effectively resist channel fading, and further can improve channel estimation performance.

The following is a description of the length of the sequence w _g,p (·) being 4, for example, the sequences of the first orthogonal sequence group/the second orthogonal sequence group include the following sequences:

{1，1，1，1}；{1，-1，1，-1}；{1，1，-1，-1}；{1，-1，-1，1}；

or the sequences of the first orthogonal sequence group/the second orthogonal sequence group comprise the following sequences:

{1，-1，-1i，-1i}；{1，1，-1i，1i}；{1，-1，1i，1i}；{1，1，1i，-1i}；

{1，-1i，-1i，-1}；{1，1i，-1i，1}；{1，-1i，1i，1}；{1，1i，1i，-1}；

{1，-1i，-1，-1i}；{1，1i，-1，1i}；{1，-1i，1，1i}；{1，1i，1，-1i}。

the specific sequence obtaining manner in the implementation manner may be:

Each orthogonal sequence group obtains all sequences in the orthogonal sequence group according to a base sequence, the base sequence is { x ₀,x₁,x₂,x₃ }, each item of the 4-length Wa1sh code { w ₀,w₁,w₂,w₃ } is multiplied to obtain { x ₀w₀,x₁w₁,x₂w₂,x₃w₃ }, can be noted as s= { x ₀w₀,x₁w₁,x₂w₂,x₃w₃ }, where { w ₀,w₁,w₂,w₃ } is {1, 1}, {1, -1, -1}, {1, -1, -1}, {1, -1,1} having a base sequence {1, 1}, wherein Each row of which represents a sequence, the latter of which is similar, the following sequence can be obtained by the above formula: {1,1,1,1},{1, -1,1, -1},{1,1, -1, -1},{1, -1, -1,1}.

The base sequence is {1, -1, -1i, -1i }, whereinThe following sequence can be obtained by the above formula: {1, -1, -1i, -1i }; {1, -1i,1i }; {1, -1,1i }; {1,1i, -1i }.

The base sequence is {1, -1i, -1i, -1}, whereinThe following sequence can be obtained by the above formula: {1, -1i, -1i, -1}; {1,1i, -1i,1}; {1, -1i,1}; {1,1i, -1}.

The base sequence is {1, -1i, -1, -1i }, whereinThe following sequence can be obtained by the above formula: {1, -1i, -1, -1i }; {1,1i, -1,1i }; {1, -1i,1i }; {1,1i,1, -1i }.

That is, the first orthogonal sequence group may be any one of the four sequence groups described above, and the second orthogonal sequence group may be any one of the four sequence groups described above, wherein any one of the first orthogonal sequence group and any one of the second orthogonal sequence group are different.

And the sequences in any one of the four sequence groups are mutually orthogonal.

When the frequency resources of the reference signals in at least two reference signal groups comprise the same resource block, the reference signal sequences corresponding to the sequences of the first orthogonal sequence group and the reference signal sequences corresponding to the sequences of the second orthogonal sequence group are mapped on the same subcarrier in the same resource block.

For example, in accordance with a reference signal sequenceIn the process of generating the reference signals, the first item of the sequences of the reference signals in the at least two reference signal groups are mapped on the same RE, the second item is also mapped on the same RE, the third item is also mapped on the same RE, and so on.

Wherein the orthogonal code sequences of the corresponding reference signals in each reference signal group correspond to the same RE, as shown in fig. 10a and 10 b. Wherein w (0), w (1), w (2), w (3) shown in fig. 10a and 10b may be the sequences w _g,p (·) in the first orthogonal sequence group, and w (0), w (1), w (2), w (3) may also be the sequences w _g,p (·) in the second orthogonal sequence group. The present embodiment is not particularly limited thereto. Fig. 10a is a schematic diagram of the reference signal occupying one OFDM symbol. Fig. 10b is a schematic diagram when the reference signal occupies two OFDM symbols.

It should be noted that the placement order of the respective items of the orthogonal code sequences in fig. 10a and 10b is only an exemplary order. In the specific implementation process, different placement sequences can be adopted according to the needs.

Wherein the mask sequences of the corresponding reference signals in each reference signal group correspond to the positions shown in fig. 11a, wherein the reference signals occupy one OFDM symbol. As shown in fig. 11b, an example of two OFDM symbols is occupied. The mask sequences c (0), c (1) and c (2) shown in fig. 11b may be mask sequences corresponding to the first orthogonal sequence group or mask sequences corresponding to the second orthogonal sequence group. The mask sequence corresponding to the first orthogonal sequence set is different from the mask sequence corresponding to the second orthogonal sequence set.

Wherein the 4 long partial sequence cross correlation of the sequences of the reference signals among the reference signal sequence groups is related only to the sequence w _g,p (), the 4 long partial sequences are as followsAs another example of this, it is possible,Etc. The cross correlation between w _g,p (·) is 0.5, the cross correlation is optimal, and the local cross correlation of the reference signal is optimal, so that the channel fading can be effectively resisted, and the channel estimation performance is improved.

Alternatively, the sequence c _g (t) may satisfy:

Sequence c _g (t) is such that the sequences of reference signals between the reference signal sequence groupsCross-correlation ofCan ensure that the overall cross-correlation of the reference signals is also optimal, and the cross-correlation of any N _g·L^v long local sequences isV=0, 1,2 … is also optimal, so that channel fading can be effectively resisted, and channel estimation performance is improved.

The following is a description of the sequence w _g,p (. Cndot.) with a length of 8. Wherein the sequences of the first orthogonal sequence group/the second orthogonal sequence group include the following sequences:

{-1i,-1,1i,-1,1i,-1,1i,1};{-1i,1,1i,1,1i,1,1i,-1};{-1i,-1,-1i,1,1i,-1,-1i,-1};{-1i,1,-1i,-1,1i,1,-1i,1};{-1i,-1,1i,-1,-1i,1,-1i,-1};{-1i,1,1i,1,-1i,-1,-1i,1};{-1i,-1,-1i,1,-1i,1,1i,1};{-1i,1,-1i,-1,-1i,-1,1i,-1};

{1i,-1i,-1,-1,1i,1i,-1,1};{1i,1i,-1,1,1i,-1i,-1,-1};{1i,-1i,1,1,1i,1i,1,-1};{1i,1i,1,-1,1i,-1i,1,1};{1i,-1i,-1,-1,-1i,-1i,1,-1};{1i,1i,-1,1,-1i,1i,1,1};{1i,-1i,1,1,-1i,-1i,-1,1};{1i,1i,1,-1,-1i,1i,-1,-1};

{1i,1i,1i,-1i,-1,-1,-1,1};{1i,-1i,1i,1i,-1,1,-1,-1};{1i,1i,-1i,1i,-1,-1,1,-1};{1i,-1i,-1i,-1i,-1,1,1,1};{1i,1i,1i,-1i,1,1,1,-1};{1i,-1i,1i,1i,1,-1,1,1};{1i,1i,-1i,1i,1,1,-1,1};{1i,-1i,-1i,-1i,1,-1,-1,-1};

{-1,1i,-1,1i,1i,-1,-1i,1};{-1,-1i,-1,-1i,1i,1,-1i,-1};{-1,1i,1,-1i,1i,-1,1i,-1};{-1,-1i,1,1i,1i,1,1i,1};{-1,1i,-1,1i,-1i,1,1i,-1};{-1,-1i,-1,-1i,-1i,-1,1i,1};{-1,1i,1,-1i,-1i,1,-1i,1};{-1,-1i,1,1i,-1i,-1,-1i,-1};

{1i,-1,-1,1i,-1,-1i,1i,1};{1i,1,-1,-1i,-1,1i,1i,-1};{1i,-1,1,-1i,-1,-1i,-1i,-1};{1i,1,1,1i,-1,1i,-1i,1};{1i,-1,-1,-1,1i,1,1i,-1i,-1};{1i,1,-1,-1i,1,-1i,-1i,1};{1i,-1,1,-1i,1,1i,1i,1};{1i,1,1,1i,1,-1i,1i,-1};

{-1,1i,-1i,-1,-1,1i,1i,1};{-1,-1i,-1i,1,-1,-1i,1i,-1};{-1,1i,1i,1,-1,1i,-1i,-1};{-1,-1i,1i,-1,-1,-1i,-1i,1};{-1,1i,-1i,-1,1,-1i,-1i,-1};{-1,-1i,-1i,1,1,1i,-1i,1};{-1,1i,1i,1,1,-1i,1i,1};{-1,-1i,1i,-1,1,1i,1i,-1};

{-1,-1,1i,1i,-1i,1i,-1,1};{-1,1,1i,-1i,-1i,-1i,-1,-1};{-1,-1,-1i,-1i,-1i,1i,1,-1};{-1,1,-1i,1i,-1i,-1i,1,1};{-1,-1,1i,1i,1i,-1i,1,-1};{-1,1,1i,-1i,1i,1i,1,1};{-1,-1,-1i,-1i,1i,-1i,-1,1};{-1,1,-1i,1i,1i,1i,-1,-1};

{1,1,1,1,1,1,1,1};{1,-1,1,-1,1,-1,1,-1};{1,1,-1,-1,1,1,-1,-1};{1,-1,-1,1,1,-1,-1,1};{1,1,1,1,-1,-1,-1,-1};{1,-1,1,-1,-1,1,-1,1};{1,1,-1,-1,-1,-1,1,1};{1,-1,-1,1,-1,1,1,-1}.

the specific sequence obtaining mode in the implementation mode can be as follows:

Each orthogonal sequence group obtains all sequences in the orthogonal sequence group according to a base sequence, the base sequence is { x ₀,x₁,x₂,x₃,x₄,x₅,x₆,x₇ }, and the base sequence is multiplied by each item of 8-length Walsh codes { w ₀,w₁,w₂,w₃,w₄,w₅,w₆,w₇ } to obtain {x₀w₀,x₁w₁,x₂w₂,x₃w₃,x₄w₄,x₅w₅,x₆w₆,x₇w₇}, which can be recorded as S＝{x₀w₀,x₁w₁,x₂w₂,x₃w₃,x₄w₄,x₅w₅,x₆w₆,x₇w₇},, wherein { w ₀,w₁,w₂,w₃,w₄,w₅,w₆,w₇ } is any item of {1,1,1,1,1,1,1,1},{1,-1,1,-1,1,-1,1,-1},{1,1,-1,-1,1,1,-1,-1},{1,-1,-1,1,1,-1,-1,1},{1,1,1,1,-1,-1,-1,-1},{1,-1,1,-1,-1,1,-1,1},{1,1,-1,-1,-1,-1,1,1},{1,-1,-1,1,-1,1,1,-1}, and the base sequence is { -1i, -1,1i,1}, wherein

Each row of the array represents a sequence, and the following is similarly expressed, and can be obtained by the above formula ：{-1i,-1,1i,-1,1i,-1,1i,1};{-1i,1,1i,1,1i,1,1i,-1};{-1i,-1,-1i,1,1i,-1,-1i,-1};{-1i,1,-1i,-1,1i,1,-1i,1};{-1i,-1,1i,-1,-1i,1,-1i,-1};{-1i,1,1i,1,-1i,-1,-1i,1};{-1i,-1,-1i,1,-1i,1,1i,1};{-1i,1,-1i,-1,-1i,-1,1i,-1}.

The base sequence is {1i, -1i, -1,1i, -1,1}, the following sequence can be obtained by the above formula ：{1i,-1i,-1,-1,1i,1i,-1,1};{1i,1i,-1,1,1i,-1i,-1,-1};{1i,-1i,1,1,1i,1i,1,-1};{1i,1i,1,-1,1i,-1i,1,1};{1i,-1i,-1,-1,-1i,-1i,1,-1};{1i,1i,-1,1,-1i,1i,1,1};{1i,-1i,1,1,-1i,-1i,-1,1};{1i,1i,1,-1,-1i,1i,-1,-1}.

The base sequence is {1i, -1, -1, -1,1}, the following sequence can be obtained by the above formula ：{1i,1i,1i,-1i,-1,-1,-1,1};{1i,-1i,1i,1i,-1,1,-1,-1};{1i,1i,-1i,1i,-1,-1,1,-1};{1i,-1i,-1i,-1i,-1,1,1,1};{1i,1i,1i,-1i,1,1,1,-1};{1i,-1i,1i,1i,1,-1,1,1};{1i,1i,-1i,1i,1,1,-1,1};{1i,-1i,-1i,-1i,1,-1,-1,-1}.

The base sequence is { -1,1i, -1i,1}, the following sequence can be obtained by the above formula ：{-1,1i,-1,1i,1i,-1,-1i,1};{-1,-1i,-1,-1i,1i,1,-1i,-1};{-1,1i,1,-1i,1i,-1,1i,-1};{-1,-1i,1,1i,1i,1,1i,1};{-1,1i,-1,1i,-1i,1,1i,-1};{-1,-1i,-1,-1i,-1i,-1,1i,1};{-1,1i,1,-1i,-1i,1,-1i,1};{-1,-1i,1,1i,-1i,-1,-1i,-1}.

The base sequence is {1i, -1,1i, -1i,1}, the following sequence can be obtained by the above formula ：{1i,-1,-1,1i,-1,-1i,1i,1};{1i,1,-1,-1i,-1,1i,1i,-1};{1i,-1,1,-1i,-1,-1i,-1i,-1};{1i,1,1,1i,-1,1i,-1i,1};{1i,-1,-1,-1,1i,1,1i,-1i,-1};{1i,1,-1,-1i,1,-1i,-1i,1};{1i,-1,1,-1i,1,1i,1i,1};{1i,1,1,1i,1,-1i,1i,-1}.

The base sequence is {1, -1i, -1i, -1i,1, -1i, -1i, -1i }, the following sequence can be obtained by the above formula ：{-1,1i,-1i,-1,-1,1i,1i,1};{-1,-1i,-1i,1,-1,-1i,1i,-1};{-1,1i,1i,1,-1,1i,-1i,-1};{-1,-1i,1i,-1,-1,-1i,-1i,1};{-1,1i,-1i,-1,1,-1i,-1i,-1};{-1,-1i,-1i,1,1,1i,-1i,1};{-1,1i,1i,1,1,-1i,1i,1};{-1,-1i,1i,-1,1,1i,1i,-1}.

The base sequence is { -1,1i, -1i, -1,1}, the following sequence can be obtained by the above formula ：{-1,-1,1i,1i,-1i,1i,-1,1};{-1,1,1i,-1i,-1i,-1i,-1,-1};{-1,-1,-1i,-1i,-1i,1i,1,-1};{-1,1,-1i,1i,-1i,-1i,1,1};{-1,-1,1i,1i,1i,-1i,1,-1};{-1,1,1i,-1i,1i,1i,1,1};{-1,-1,-1i,-1i,1i,-1i,-1,1};{-1,1,-1i,1i,1i,1i,-1,-1}.

The base sequence is {1,1,1,1,1,1,1,1}, the following sequence can be obtained by the above formula ：{1,1,1,1,1,1,1,1};{1,-1,1,-1,1,-1,1,-1};{1,1,-1,-1,1,1,-1,-1};{1,-1,-1,1,1,-1,-1,1};{1,1,1,1,-1,-1,-1,-1};{1,-1,1,-1,-1,1,-1,1};{1,1,-1,-1,-1,-1,1,1};{1,-1,-1,1,-1,1,1,-1}.

The first orthogonal sequence group may be any one of the eight sequence groups, and the second orthogonal sequence group may be any one of the eight sequence groups, and any one of the first orthogonal sequence group and any one of the second orthogonal sequence group may be different. The sequences in any one of the eight sequence groups are orthogonal to each other.

Wherein the orthogonal code sequences of the corresponding reference signals in each reference signal group correspond to the same RE. As shown in fig. 12.

Note that the order of placement of the respective items of the orthogonal code sequences in fig. 12 is only one exemplary order. In the specific implementation process, different placement sequences can be adopted according to the needs.

Wherein the mask sequences of the corresponding reference signals in each reference signal group correspond to the positions shown in fig. 13.

Wherein 8 long partial sequence cross-correlations of sequences of reference signals among the reference signal sequence sets are correlated only with the sequence w _g,p (n), 8 long partial sequences such asEtc. Wherein the cross-correlation between w _g,p (.)The cross correlation is optimal, and the local cross correlation of the reference signals can effectively resist channel fading, so that the channel estimation performance is improved.

Sequence c _g (·) is such that the sequences of reference signals between the reference signal sequence groupsCross-correlation ofCan ensure that the overall cross-correlation of the reference signals is also optimal, and the cross-correlation of any N _g·L^v long local sequences isV=0, 1,2 … is also optimal, so that channel fading can be effectively resisted, and channel estimation performance is improved.

As another implementation manner, the embodiment of the present application further provides an embodiment in which the lengths of sequences in the first orthogonal sequence group and the second orthogonal sequence group are different. For example, the length of the sequence corresponding to the first orthogonal sequence group is 2 times the length of the sequence corresponding to the second orthogonal sequence group.

As a first implementation, the length of the sequence corresponding to the first orthogonal sequence group is 4, and the length of the sequence corresponding to the second orthogonal sequence group is 2.

Wherein the sequences of the first orthogonal sequence set include the following sequences:

or the sequences of the first orthogonal sequence set include the following sequences:

wherein the sequences of the second orthogonal sequence set include the following sequences:

{1，1}；{1，-1}。

the sequence obtaining manner of the first orthogonal sequence group in the implementation manner may be:

Each orthogonal sequence group obtains all sequences in the orthogonal sequence group according to a base sequence, the base sequence is { x ₀,x₁,x₂,x₃ }, each item of the 4-length Walsh code { w ₀,w₁,w₂,w₃ } is multiplied to obtain { x ₀w₀,x₁w₁,x₂w₂,x₃w₃ }, can be expressed as s= { x ₀w₀,x₁w₁,x₂w₂,x₃w₃ }, where { w ₀,w₁,w₂,w₃ } is {1, 1}, {1, -1, -1}, {1, -1, -1}, {1, -1,1}, and the base sequence is {1, -1, -1i, -1i }, where Each row of which represents a sequence, the latter of which is similar, the following sequence can be obtained by the above formula: {1, -1, -1i, -1i }; {1, -1i,1i }; {1, -1,1i }; {1,1i, -1i }.

The first orthogonal sequence group may be any one of the two first orthogonal sequence groups. The sequences in any one of the first orthogonal sequence groups are mutually orthogonal. The sequences in the second orthogonal sequence group are also orthogonal to each other.

Wherein, when the sequences of the second orthogonal sequence set include {1,1}; {1, -1} the time-frequency resource mapping manner is as shown in fig. 2a in the prior art, 4 orthogonal reference signals can be obtained, wherein, the 4 orthogonal reference signals are all regarded as code division orthogonality, and the orthogonal sequences on 4 continuous subcarriers of the 4 orthogonal reference signals can be regarded as the following sequences:

{1，0，1，0}；{0，1，01}；{1，0，-1，0}；{0，1，0，-1}；

The cross-correlation value between any of the sequences and any of the sequences in the first orthogonal sequence set is 0.5.

When the frequency resources of the reference signals in at least two reference signal groups comprise the same resource block, the reference signal sequence corresponding to the sequence of the first orthogonal sequence group is mapped to a first subcarrier with equal interval in the same resource block, the center frequency distance of the adjacent subcarrier in the first subcarrier is k subcarriers, the reference signal sequence corresponding to the sequence of the second orthogonal sequence group is mapped to a second subcarrier with equal interval in the same resource block, the center frequency distance of the adjacent subcarrier in the second subcarrier is 2k subcarriers, and k is a positive integer.

For example, in accordance with a reference signal sequenceIn the process of generating the reference signal, the manner of mapping the reference signal sequence corresponding to the sequence of the first orthogonal sequence group to the time-frequency resource is shown in fig. 14, where the subcarriers are sequentially numbered s+0, s+1, s+2, etc., s is any integer,Mapped on the subcarrier s +0,Mapped on the subcarrier s +1,Mapped on subcarrier s +2 and so on. Wherein the sequences of the first orthogonal sequence group correspond to reference signal sequences such asAndMapped on two adjacent subcarriers, which have a center frequency distance of 1 subcarrier, and similarly,AndAlso mapped on two adjacent subcarriers whose center frequency is also 1 subcarrier apart.

The manner of mapping the reference signal sequences corresponding to the sequences of the second orthogonal sequence group to the time-frequency resource is shown in fig. 2a, wherein the reference signal sequences corresponding to the sequences of the second orthogonal sequence group are as followsAndMapped on a subcarrier that is separated by two subcarriers, wherein the center frequency of the two subcarriers is 2 subcarriers apart, and similarly,AndAlso mapped on subcarriers separated by two subcarriers whose center frequencies are also 2 subcarriers apart.

Wherein the mask sequence of the reference signal corresponding to the sequence of the first orthogonal sequence group corresponds to the position shown in fig. 11 a. In this case, where c (0), c (1), and c (2) shown in fig. 11a are mask sequences corresponding to the first orthogonal sequence group. The mask sequences of the reference signals corresponding to the sequences of the second orthogonal sequence group correspond to the positions shown in fig. 8, in which case c (0), c (1), and c (2) shown in fig. 8 are the mask sequences corresponding to the second orthogonal sequence group. Wherein the mask sequence corresponding to the first orthogonal sequence group is different from the mask sequence corresponding to the second orthogonal sequence group.

The local sequence cross-correlation of the sequences of the reference signals among the reference signal sequence groups is only related to the sequences w _g,p (·) and is optimal, and the local cross-correlation of the reference signals can effectively resist channel fading and improve channel estimation performance, wherein the cross-correlation among w _g,p (·) is 0.5.

Sequence c _g (·) is such that the sequences of reference signals between the reference signal sequence groupsCross-correlation value betweenThe method can ensure that the overall cross correlation of the reference signals is optimal, can effectively resist channel fading and improves the channel estimation performance.

That is, the present solution is compatible with the prior art. The orthogonal sequence group provided by the scheme can be compatible with the orthogonal sequences used in the prior art, and when the signal transmission method provided by the scheme is adopted for multi-layer transmission, when different transmission ends respectively adopt the sequences in the first orthogonal sequence group and the sequences in the second orthogonal sequence group, the optimal cross correlation between any two non-orthogonal sequences can be achieved, and the smaller interference of pilot signals between different layers is ensured.

As an example of another sequence, for example, the length of the sequence corresponding to the first orthogonal sequence group is 8, and the length of the sequence corresponding to the second orthogonal sequence group is 4.

the sequences of the second orthogonal sequence set include the following sequences:

{1，1，1，1}；{1，-1，1，-1}；{1，1，-1，-1}；{1，-1，-1，1}。

Each orthogonal sequence group obtains all sequences in the orthogonal sequence group according to a base sequence, the base sequence is { x ₀,x₁,x₂,x₃,x₄,x₅,x₆,x₇ }, and the base sequence is multiplied by each item of 8-length Walsh codes { w ₀,w₁,w₂,w₃,w₄,w₅,w₆,w₇ } to obtain {x₀w₀,x₁w₁,x₂w₂,x₃w₃,x₄w₄,x₅w₅,x₆w₆,x₇w₇}, which can be recorded as S＝{x₀w₀,x₁w₁,x₂w₂,x₃w₃,x₄w₄,x₅w₅,x₆w₆,x₇w₇},, wherein { w ₀,w₁,w₂,w₃,w₄,w₅,w₆,w₇ } is any item of {1,1,1,1,1,1,1,1},{1,-1,1,-1,1,-1,1,-1},{1,1,-1,-1,1,1,-1,-1},{1,-1,-1,1,1,-1,-1,1},{1,1,1,1,-1,-1,-1,-1},{1,-1,1,-1,-1,1,-1,1},{1,1,-1,-1,-1,-1,1,1},{1,-1,-1,1,-1,1,1,-1}, and the base sequence is { -1i, -1,1i,1}, wherein Each row of the array represents a sequence, and the following is similarly expressed, and can be obtained by the above formula ：{-1i,-1,1i,-1,1i,-1,1i,1};{-1i,1,1i,1,1i,1,1i,-1};{-1i,-1,-1i,1,1i,-1,-1i,-1};{-1i,1,-1i,-1,1i,1,-1i,1};{-1i,-1,1i,-1,-1i,1,-1i,-1};{-1i,1,1i,1,-1i,-1,-1i,1};{-1i,-1,-1i,1,-1i,1,1i,1};{-1i,1,-1i,-1,-1i,-1,1i,-1}.

The first orthogonal sequence group may be any one of the four first orthogonal sequence groups. The sequences in any one of the first orthogonal sequence groups are mutually orthogonal. The sequences in the second orthogonal sequence group are also orthogonal to each other.

Wherein, when the sequences of the second orthogonal sequence set include {1, 1}; {1, -1, -1}; {1, -1, -1}; {1, -1,1} the second orthogonal sequence set mapping manner is as shown in prior art 2b, and 8 reference signals are obtained by frequency division and code division. All 8 reference signals are considered as code division, wherein the orthogonal sequences on 8 consecutive subcarriers of the 8 reference signals can be considered as the following sequences:

{1,0,1,0,1,0,1,0};{1,0,-1,0,1,0,-1,0};{0,1,0,1,0,1,0,1};{0,1,0,-1,0,1,0,-1};{1,0,1,0,-1,0,-1,0};{1,0,-1,0,-1,0,1,0};{0,1,0,1,0,-1,0,-1};{0,1,0,-1,0,-1,0,1}.

the cross-correlation value between any one of the sequences and any one of the sequences in the first orthogonal sequence group is

Wherein the orthogonal code sequences of the reference signal sequences corresponding to the sequences of the first orthogonal sequence group correspond to the positions shown in fig. 12. The positions corresponding to the orthogonal code sequences of the reference signal sequences corresponding to the sequences of the second orthogonal sequence group are identical to those of the prior art as shown in fig. 2 b.

Wherein the mask sequence of the reference signal corresponding to the sequence of the first orthogonal sequence group corresponds to the position shown in fig. 13. In this case, where c (0), c (1), and c (2) shown in fig. 13 are mask sequences corresponding to the first orthogonal sequence group. The mask sequence of the reference signal corresponding to the sequence of the second orthogonal sequence group corresponds to the position shown in fig. 11b, in which case c (0), c (1) and c (2) shown in fig. 11b are the mask sequences corresponding to the second orthogonal sequence group. Wherein the mask sequence corresponding to the first orthogonal sequence group is different from the mask sequence corresponding to the second orthogonal sequence group.

Wherein the local sequence cross-correlation of the sequences of the reference signal between the reference signal sequence sets is related to the sequences w _g,p (·), wherein the cross-correlation between w _g,p (·) isThe method is optimal, the local cross correlation of the reference signals is optimal, channel fading can be effectively resisted, and channel estimation performance is improved.

Sequence c _g (t) is such that the sequences of reference signals between the reference signal sequence groupsCross-correlation ofThe method can ensure that the overall cross correlation of the reference signals is optimal, can effectively resist channel fading and improves the channel estimation performance.

The above description only uses the first orthogonal sequence group with the sequence lengths of 4 and 8 as an example, and may be any other length, which is not limited in this aspect.

In the embodiment of the present application, the length of the sequence corresponding to the first orthogonal sequence group is 2 times that of the sequence corresponding to the second orthogonal sequence group, which is described as an example, or the length of the sequence corresponding to the second orthogonal sequence group is 2 times that of the sequence corresponding to the first orthogonal sequence group, and accordingly, the sequences of the orthogonal sequence groups may be interchanged, which is not particularly limited.

Further, the length multiple 2 may be any other value, and the present embodiment is not specifically limited herein.

On the other hand, the embodiment of the application also provides a signal sending method. The method comprises the following steps:

the network device transmits a first reference signal based on Generating, wherein theThe method meets the following conditions:

wherein m=0, … M-1, M is Is a sequence length of (2); a is a non-zero complex number; r (m) is a pseudo-random sequence;

Wherein the length of the sequence w _g,p (·) is N _g, N satisfies n=mmod N _g, M is not less than 2N _g, and the sequence w _g,p (·) is associated with the orthogonal sequence p in the orthogonal sequence group g; the orthogonal sequence group g is one of a first orthogonal sequence group and a second orthogonal sequence, the sequences in the first orthogonal sequence group are mutually orthogonal, the sequences in the second orthogonal sequence group are mutually orthogonal, and any sequence in the first orthogonal sequence group is different from any sequence in the second orthogonal sequence;

wherein, Sequence c _g (·) is one sequence in the first set of mask sequences, the value of sequence c _g (·) being associated with sequence group g.

The first orthogonal sequence set and the second orthogonal sequence set are only used as examples, and may be any other multiple orthogonal sequence sets, which is not particularly limited in this scheme.

The network device may be a UE or a base station.

Wherein, different orthogonal sequence groups g are associated with different values of c _g (·).

The sequence c _g (·) satisfies:

wherein e _g denotes a sequence of length L, Represents the alpha-time Cronecker product of e _g, said alpha satisfyingE _g corresponding to the plurality of reference signal sequences form a second mask sequence set, where L is a positive integer.

As one implementation manner, the length of the sequence corresponding to the first orthogonal sequence group is the same as the length of the sequence corresponding to the second orthogonal sequence group.

Wherein the sequences of the first orthogonal sequence set include the following sequences: {1,1}; {1, -1}; the sequences of the second orthogonal sequence set include the following sequences: {1,1i }; {1, -1i };

or the sequences of the first orthogonal sequence set include the following sequences: {1,1i }; {1, -1i }; the sequences of the second orthogonal sequence set include the following sequences: {1,1}; {1, -1};

Where i is an imaginary unit.

Alternatively, the sequences of the first orthogonal sequence group/the second orthogonal sequence group include the following sequences:

{1，1，1，1}；{1，-1，1，-1}；{1，1，-1，-1}；{1，-1，-1，1}；

{1, -1i, -1, -1i }; {1,1i, -1,1i }; {1, -1i, 1i }; {1,1i,1, -1i }; where i is an imaginary unit.

{1,1,1,1,1,1,1,1};{1,-1,1,-1,1,-1,1,-1};{1,1,-1,-1,1,1,-1,-1};{1,-1,-1,1,1,-1,-1,1};{1,1,1,1,-1,-1,-1,-1};{1,-1,1,-1,-1,1,-1,1};{1,1,-1,-1,-1,-1,1,1};{1,-1,-1,1,-1,1,1,-1}; Where i is an imaginary unit.

As another implementation manner, the length of the sequence corresponding to the first orthogonal sequence group is 2 times that of the sequence corresponding to the second orthogonal sequence group.

{1,1}; {1, -1}; where i is an imaginary unit.

Alternatively, the sequences of the first orthogonal sequence set include the following sequences:

{1, 1}; {1, -1, -1}; {1, -1, -1}; {1, -1,1}; where i is an imaginary unit.

Wherein the sequences in the second set of mask sequences include the following sequences:

{1,1}; {1,1i }; where i is an imaginary unit.

Referring to fig. 15, a schematic view of a scenario of a signal sending method according to an embodiment of the present application is provided. Wherein the first user equipment group may be determined based on sequences in the first orthogonal sequence groupFurther transmitting a reference signal, the second set of user equipment may determine based on sequences in the second set of orthogonal sequencesFurther transmitting a reference signal; because the cross correlation of the DMRS pilot sequences used by the two user equipment groups is small, the interference between non-orthogonal DMRS ports is smaller, namely the interference between the two user equipment groups is smaller, and the channel estimation performance is further improved.

The above embodiments describe a signal transmission method, as shown in fig. 16a, the embodiment of the present application further provides a signal receiving method, which includes steps 1601 to 1602, specifically as follows:

1601. The method comprises the steps that a receiving end sends/receives a signaling, wherein the signaling carries a preset domain segment and indicates a first reference signal combination, and the first reference signal combination comprises one or more reference signals; wherein, different values of the preset domain segment in the signaling correspond to different reference signal combinations respectively; all reference signals included in the different reference signal combinations form a reference signal set, and the reference signal set comprises at least two reference signal groups; reference signal sequences for each reference signal in the at least two reference signal groups The method meets the following conditions:

wherein M is an integer from 0 to M-1, M is Is a sequence length of (2); a is a non-zero complex number; r (m) is a pseudo-random sequence;

Wherein the length of the sequence w _g,p (·) is N _g, N satisfies n=mmod N _g, M is not less than 2N _g, g is the identity of the orthogonal sequence group, and the at least two reference signal groups satisfy the following conditions: reference signal sequences of all reference signals in the first reference signal group The corresponding orthogonal code sequences w _g,p (·) form a first orthogonal sequence group, the reference signal sequences of all reference signals in the second reference signal groupThe corresponding orthogonal code sequences w _g,p (·) constitute a second set of orthogonal sequences; traversing at least a first orthogonal sequence group and a second orthogonal sequence group; p traversing all sequences in the orthogonal sequence group; sequences in the first orthogonal sequence group are orthogonal to each other, sequences in the second orthogonal sequence group are orthogonal to each other, and any sequence in the first orthogonal sequence group and any sequence in the second orthogonal sequence group are different;

wherein, Sequence c _g (·) is one sequence in the first set of mask sequences, and the range of self-variable values isThe sequence c _g (·) corresponding to the first orthogonal sequence set is different from the sequence c _g (·) corresponding to the second orthogonal sequence set;

The sequence r (m) corresponding to the first sequence group is identical to the sequence r (m) corresponding to the second sequence group.

Step 1601 may include: the receiving end sends signaling. The receiving end may be a base station.

Step 1601 may further include: the receiving end receives the signaling. Wherein the receiving end may be a terminal device.

1602. The receiving end receives the one or more reference signals and processes the one or more reference signals according to at least one reference signal sequence.

Wherein the sequence c _g (·) satisfies:

As one implementation, the sequences of the first orthogonal sequence set include the following sequences: {1,1}; {1, -1}; the sequences of the second orthogonal sequence set include the following sequences: {1,1i }; {1, -1i };

Or the sequences of the first orthogonal sequence set include the following sequences: {1,1i }; {1, -1i }; the sequences of the second orthogonal sequence set include the following sequences: {1,1}; {1, -1}; where i is an imaginary unit.

As another implementation, the sequences of the first orthogonal sequence group/the second orthogonal sequence group include the following sequences:

{1，1，1，1}；{1，-1，1，-1}；{1，1，-1，-1}；{1，-1，-1，1}；

{1,1}; {1, -1}; where i is an imaginary unit.

As another implementation, the sequences of the first orthogonal sequence set include the following sequences:

{1, 1}; {1, -1, -1}; {1, -1, -1}; {1, -1,1}; where i is an imaginary unit.

{1,1}; {1,1i }; where i is an imaginary unit.

The signal receiving method may refer to the description of the signal sending method in each embodiment, and will not be repeated here.

On the other hand, the embodiment of the application also provides a signal receiving method. The method comprises the following steps:

the network device receives a first reference signal, the reference signal based on Generating, wherein theThe method meets the following conditions:

wherein, Sequence c _g (·) is one sequence in the first set of mask sequences, and the range of self-variable values isThe value of the sequence c _g (. Cndot.) is associated with the sequence set g.

The network device may be a UE or a base station.

The sequence c _g (·) satisfies:

Where i is an imaginary unit.

{1，1，1，1}；{1，-1，1，-1}；{1，1，-1，-1}；{1，-1，-1，1}；

When the frequency resources of the reference signals in the at least two reference signal groups comprise the same resource block, the reference signal sequence corresponding to the sequence of the first orthogonal sequence group is mapped to a first subcarrier with medium interval in the same resource block, the center frequency distance of the adjacent subcarrier in the first subcarrier is k subcarriers, the reference signal sequence corresponding to the sequence of the second orthogonal sequence group is mapped to a second subcarrier with medium interval in the same resource block, the center frequency distance of the adjacent subcarrier in the second subcarrier is 2k subcarriers, and k is a positive integer. The second subcarriers are a subset of the first subcarriers.

In the present invention, the reference signal sequences corresponding to the first orthogonal sequence group and the second orthogonal sequence group may be reference signal sequences on part of time-frequency resources of the reference signal, for example, the reference signal occupies 2 OFDM symbols in the system, and the reference signal sequences corresponding to the first orthogonal sequence group and the second orthogonal sequence group are reference signal sequences on 1 OFDM symbol therein. In addition to the at least two reference signal groups, all reference signals may also include other frequency division multiplexed reference signals.

{1,1}; {1, -1}; where i is an imaginary unit.

{1, 1}; {1, -1, -1}; {1, -1, -1}; {1, -1,1}; where i is an imaginary unit.

{1,1}; {1,1i }; where i is an imaginary unit.

The above sequence can ensure that the interference of the reference signal is low even if the first subcarrier and the second subcarrier are not identical.

As shown in fig. 16b, an embodiment of the present application further provides a communication apparatus, including:

A transceiver unit 1601, configured to receive/send a signaling, where the signaling carries a preset field segment and indicates a first reference signal combination, where the first reference signal combination includes one or more reference signals; wherein, different values of the preset domain segment in the signaling correspond to different reference signal combinations respectively; all reference signals included in the different reference signal combinations form a reference signal set, and the reference signal set comprises at least two reference signal groups; reference signal sequences for each reference signal in the at least two reference signal groups Satisfy the following requirementsWherein M is an integer from 0 to M-1, M isIs a sequence length of (2); a is a non-zero complex number; r (m) is a pseudo-random sequence; wherein the length of the sequence w _g,p (N) is N _g, N satisfies n=mmod N _g, M is not less than 2N _g, g is the identity of the orthogonal sequence group, and the at least two reference signal groups satisfy the following conditions: reference signal sequences of all reference signals in the first reference signal groupThe corresponding orthogonal code sequences w _g,p (·) form a first orthogonal sequence group, the reference signal sequences of all reference signals in the second reference signal groupThe corresponding orthogonal code sequences w _g,p (·) constitute a second set of orthogonal sequences; traversing at least a first orthogonal sequence group and a second orthogonal sequence group; p traversing all sequences in the orthogonal sequence group; sequences in the first orthogonal sequence group are orthogonal to each other, sequences in the second orthogonal sequence group are orthogonal to each other, and any sequence in the first orthogonal sequence group and any sequence in the second orthogonal sequence group are different; wherein, Sequence c _g (·) is one sequence in the first mask sequence set, and sequence c _g (·) corresponding to the first orthogonal sequence set is different from sequence c _g (·) corresponding to the second orthogonal sequence set; the sequence r (m) corresponding to the first sequence group is identical to the sequence r (m) corresponding to the second sequence group;

a processing unit 1602, configured to generate and transmit the one or more reference signals.

The sequence c _g (·) satisfies:

Where i is an imaginary unit.

{1，1，1，1}；{1，-1，1，-1}；{1，1，-1，-1}；{1，-1，-1，1}；

{1,1}; {1, -1}; where i is an imaginary unit.

{-1i,-1,1i,-1,1i,-1,1i,1};{-1i,1,1i,1,1i,1,1i,-1};{-1i,-1,-1i,1,1i,-1,-1i,-1};{-1i,1,-1i,-1,1i,1,-1i,1};{-1i,-1,1i,-1,-1i,1,-1i,-1};{-1i,1,1i,1,-1i,-1,-1i,1};{-1i,-1,-1i,1,-1i,1,1i,1};{-1i,1,-1i,-1,-1i,-1,1i,-1},

{1, 1}; {1, -1, -1}; {1, -1, -1}; {1, -1,1}; where i is an imaginary unit.

{1,1}; {1,1i }; where i is an imaginary unit.

The embodiment of the application also provides a communication device, which comprises: a transceiver unit, configured to send/receive a signaling, where the signaling carries a preset field segment and indicates a first reference signal combination, where the first reference signal combination includes one or more reference signals; wherein, different values of the preset domain segment in the signaling correspond to different reference signal combinations respectively; all reference signals included in the different reference signal combinations form a reference signal set, and the reference signal set comprises at least two reference signal groups; reference signal sequences for each reference signal in the at least two reference signal groupsThe method meets the following conditions:

wherein M is an integer from 0 to M-1, M is Is a sequence length of (2); a is a non-zero complex number; r (m) is a pseudo-random sequence; wherein the length of the sequence w _g,p (·) is N _g, N satisfies n=mmod N _g, M is not less than 2N _g, g is the identity of the orthogonal sequence group, and the at least two reference signal groups satisfy the following conditions: reference signal sequences of all reference signals in the first reference signal groupThe corresponding orthogonal code sequences w _g,p (·) form a first orthogonal sequence group, the reference signal sequences of all reference signals in the second reference signal groupThe corresponding orthogonal code sequences w _g,p (·) constitute a second set of orthogonal sequences; traversing at least a first orthogonal sequence group and a second orthogonal sequence group; p traversing all sequences in the orthogonal sequence group; sequences in the first orthogonal sequence group are orthogonal to each other, sequences in the second orthogonal sequence group are orthogonal to each other, and any sequence in the first orthogonal sequence group and any sequence in the second orthogonal sequence group are different; wherein, Sequence c _g (·) is one sequence in the first mask sequence set, and sequence c _g (·) corresponding to the first orthogonal sequence set is different from sequence c _g (·) corresponding to the second orthogonal sequence set; the sequence r (m) corresponding to the first sequence group is identical to the sequence r (m) corresponding to the second sequence group.

And the processing unit is used for receiving the one or more reference signals and processing the one or more reference signals according to at least one reference signal sequence.

The sequence c _g (·) satisfies:

Where i is an imaginary unit.

{1，1，1，1}；{1，-1，1，-1}；{1，1，-1，-1}；{1，-1，-1，1}；

{1,1}; {1, -1}; where i is an imaginary unit.

{1, 1}; {1, -1, -1}; {1, -1, -1}; {1, -1,1}; where i is an imaginary unit.

{1,1}; {1,1i }; where i is an imaginary unit.

As shown in fig. 17, a communication apparatus 1700 is further provided in an embodiment of the present application, where the communication apparatus 1700 is configured to perform the above method. Some or all of the methods described above may be implemented in hardware or in software.

Alternatively, the communication device 1700 may be a chip or an integrated circuit when embodied.

Alternatively, when some or all of the methods of the above embodiments are implemented in software, the communication apparatus 1700 includes: a memory 1702 for storing a program; the processor 1701, configured to execute a program stored in the memory 1702, and the communication device 1700 may further include a communication interface 1703. The program, when executed, enables the communication apparatus 1700 to implement the method provided by the above-described embodiment.

Alternatively, the memory 1702 may be a physically separate unit or may be integrated with the processor 1701.

Alternatively, when some or all of the methods of the above embodiments are implemented by software, the communication apparatus 1700 may include only the processor 1701. The memory 1702 for storing a program is located outside the communication apparatus 1700, and the processor 1701 is connected to the memory 1702 through a circuit/wire or communication interface 1703 or the like for reading and executing the program stored in the memory 1702.

The processor 1701 may be a central processor (central processing unit, CPU), a network processor (network processor, NP) or a combination of CPU and NP.

The processor 1701 may further comprise a hardware chip. The hardware chips may be implemented as application-specific integrated circuits (ASICs), programmable logic devices (programmable logic device, PLDs), or a combination thereof. The PLD may be a complex programmable logic device (complex programmable logic device, CPLD), a field-programmable gate array (FPGA) GATE ARRAY, generic array logic (GENERIC ARRAY logic, GAL), or any combination thereof.

The memory 1702 may include volatile memory (RAM), such as random-access memory (RAM); the memory may also include a non-volatile memory (non-volatile memory), such as a flash memory (flash memory), a hard disk (HARD DISK DRIVE, HDD) or a solid state disk (solid-state drive (SSD); the memory may also comprise a combination of the above types of memories.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the division of the unit is merely a logic function division, and there may be another division manner when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted or not performed. The coupling or direct coupling or communication connection shown or discussed with each other may be through some interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, 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 loaded and executed on a computer, produces a flow or function in accordance with embodiments of the application, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in or transmitted across a computer-readable storage medium. The computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital subscriber line (digital subscriber line, DSL)), or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media. The usable medium may be a read-only memory (ROM), or a random-access memory (random access memory, RAM), or a magnetic medium such as a floppy disk, a hard disk, a magnetic tape, a magnetic disk, or an optical medium such as a digital versatile disk (DIGITAL VERSATILE DISC, DVD), or a semiconductor medium such as a Solid State Disk (SSD), or the like.

Claims

1. A signal transmission method, comprising:

A transmitting end receives or transmits a signaling, wherein the signaling carries a preset domain segment and indicates a first reference signal combination, and the first reference signal combination comprises one or more reference signals; wherein, different values of the preset domain segment in the signaling correspond to a plurality of reference signal combinations; all reference signals included in the plurality of reference signal combinations form a reference signal set, and the reference signal set comprises at least two reference signal groups; reference signal sequences for each reference signal in the at least two reference signal groups The method meets the following conditions:

The sequence r (m) corresponding to the first orthogonal sequence group is identical to the sequence r (m) corresponding to the second orthogonal sequence group;

The transmitting end generates and transmits the one or more reference signals.

2. The method according to claim 1, wherein the sequence c _g (·) satisfies:

wherein e _g denotes a sequence of length L, Represents the alpha-time Cronecker product of e _g, said alpha satisfyingAnd e _g corresponding to the plurality of reference signal sequences form a second mask sequence set, wherein L is a positive integer.

3. The method of claim 1, wherein the length of the sequence corresponding to the first set of orthogonal sequences is the same as the length of the sequence corresponding to the second set of orthogonal sequences.

4. The method of claim 1, wherein when the frequency resources of the reference signals in the at least two reference signal groups comprise the same resource block, the reference signal sequences corresponding to the sequences of the first orthogonal sequence group and the reference signal sequences corresponding to the sequences of the second orthogonal sequence group are mapped on the same subcarrier in the same resource block.

5. The method of any one of claims 1 to 4, wherein the sequences of the first set of orthogonal sequences comprise the following sequences: {1,1}; {1, -1}; the sequences of the second orthogonal sequence set include the following sequences: {1,1i }; {1, -1i };

Where i is an imaginary unit.

6. The method according to any one of claims 1 to 4, wherein the sequences of the first or second set of orthogonal sequences comprise the following sequences:

{1,1，1,1}；{1，-1,1，-1}；{1,1，-1，-1}；{1，-1，-1,1}；

or the sequences of the first orthogonal sequence group or the second orthogonal sequence group comprise the following sequences:

{1,-1，-1i,-1i}；{1，1,-1i，1i}；{1,-1，1i，1i}；{1，1，1i,-1i}；

{1,-1i，-1i,-1}；{1，1i,-1i，1}；{1,-1i，1i，1}；{1，1i，1i,-1}；

{1,-1i，-1,-1i}；{1，1i,-1，1i}；{1,-1i，1，1i}；{1，1i，1,-1i}；

Where i is an imaginary unit.

7. The method according to any one of claims 1 to 4, wherein the sequences of the first or second set of orthogonal sequences comprise the following sequences:

{1,1,1,1,1,1,1,1};{1,-1,1,-1,1,-1,1,-1};{1,1,-1,-1,1,1,-1,-1};{1,-1,-1,1,1,-1,-1,1};{1,1,1,1,-1,-1,-1,-1};{1,-1,1,-1,-1,1,-1,1};{1,1,-1,-1,-1,-1,1,1};{1,-1,-1,1,-1,1,1,-1};

Where i is an imaginary unit.

8. The method of claim 1, wherein the length of the sequence corresponding to the first set of orthogonal sequences is 2 times the length of the sequence corresponding to the second set of orthogonal sequences.

9. The method of claim 1, wherein when the frequency resources of the reference signals in the at least two reference signal groups include the same resource block, the reference signal sequences corresponding to the sequences of the first orthogonal sequence group are mapped to first subcarriers with medium intervals in the same resource block, the center frequency distance of adjacent subcarriers in the first subcarriers is k subcarriers, the reference signal sequences corresponding to the sequences of the second orthogonal sequence group are mapped to second subcarriers with medium intervals in the same resource block, the center frequency distance of adjacent subcarriers in the second subcarriers is 2k subcarriers, and k is a positive integer.

10. The method according to claim 8 or 9, wherein the sequences of the first set of orthogonal sequences comprise the following sequences:

{1,-1，-1i,-1i}；{1，1,-1i，1i}；{1,-1，1i，1i}；{1，1，1i,-1i}；

{1,-1i，-1i,-1}；{1，1i,-1i，1}；{1,-1i，1i，1}；{1，1i，1i,-1}；

{1,1}；{1,-1}；

Where i is an imaginary unit.

11. The method according to claim 8 or 9, wherein the sequences of the first set of orthogonal sequences comprise the following sequences:

{1,1,1,1}；{1,-1,1,-1}；{1,1,-1,-1}；{1,-1,-1,1}；

Where i is an imaginary unit.

12. The method of claim 2, wherein the sequences in the second set of mask sequences comprise the following sequences:

{1,1}；{1,1i}；

Where i is an imaginary unit.

13. A signal receiving method, comprising:

The method comprises the steps that a receiving end sends or receives a signaling, wherein the signaling carries a preset domain segment and indicates a first reference signal combination, and the first reference signal combination comprises one or more reference signals; wherein, different values of the preset domain segment in the signaling correspond to a plurality of reference signal combinations; all reference signals included in the plurality of reference signal combinations form a reference signal set, and the reference signal set comprises at least two reference signal groups; reference signal sequences for each reference signal in the at least two reference signal groups The method meets the following conditions:

The receiving end receives the one or more reference signals and processes the one or more reference signals according to at least one reference signal sequence.

14. The method of claim 13, wherein the sequence c _g (·) satisfies:

15. The method of claim 13, wherein the length of the sequence corresponding to the first set of orthogonal sequences is the same as the length of the sequence corresponding to the second set of orthogonal sequences.

16. The method of claim 13, wherein when the frequency resources of the reference signals in the at least two reference signal groups comprise the same resource block, the reference signal sequences corresponding to the sequences of the first orthogonal sequence group and the reference signal sequences corresponding to the sequences of the second orthogonal sequence group are mapped on the same subcarrier in the same resource block.

17. The method according to any one of claims 13 to 16, wherein the sequences of the first set of orthogonal sequences comprise the following sequences: {1,1}; {1, -1}; the sequences of the second orthogonal sequence set include the following sequences: {1,1i }; {1, -1i };

18. The method according to any of claims 13 to 16, wherein the sequences of the first or second set of orthogonal sequences comprise the following sequences:

{1,1，1,1}；{1，-1,1，-1}；{1,1，-1，-1}；{1，-1，-1,1}；

{1,-1，-1i,-1i}；{1，1,-1i，1i}；{1,-1，1i，1i}；{1，1，1i,-1i}；

{1,-1i，-1i,-1}；{1，1i,-1i，1}；{1,-1i，1i，1}；{1，1i，1i,-1}；

19. The method according to any of claims 13 to 16, wherein the sequences of the first or second set of orthogonal sequences comprise the following sequences:

Where i is an imaginary unit.

20. The method of claim 13, wherein the length of the sequence corresponding to the first set of orthogonal sequences is 2 times the length of the sequence corresponding to the second set of orthogonal sequences.

21. The method of claim 13, wherein when the frequency resources of the reference signals in the at least two reference signal groups include the same resource block, the reference signal sequences corresponding to the sequences of the first orthogonal sequence group are mapped to first subcarriers with medium intervals in the same resource block, the center frequency distance of adjacent subcarriers in the first subcarriers is k subcarriers, the reference signal sequences corresponding to the sequences of the second orthogonal sequence group are mapped to second subcarriers with medium intervals in the same resource block, the center frequency distance of adjacent subcarriers in the second subcarriers is 2k subcarriers, and k is a positive integer.

22. The method according to claim 20 or 21, wherein the sequences of the first set of orthogonal sequences comprise the following sequences:

{1,-1，-1i,-1i}；{1，1,-1i，1i}；{1,-1，1i，1i}；{1，1，1i,-1i}；

{1,-1i，-1i,-1}；{1，1i,-1i，1}；{1,-1i，1i，1}；{1，1i，1i,-1}；

{1,1}；{1,-1}；

Where i is an imaginary unit.

23. The method according to claim 20 or 21, wherein the sequences of the first set of orthogonal sequences comprise the following sequences:

{1,1,1,1}；{1,-1,1,-1}；{1,1,-1,-1}；{1,-1,-1,1}；

Where i is an imaginary unit.

24. The method of claim 14, wherein the sequences in the second set of mask sequences comprise the following sequences:

{1,1}；{1,1i}；

Where i is an imaginary unit.

25. A communication device, comprising:

The receiving and transmitting unit is used for receiving or transmitting a signaling, wherein the signaling carries a preset domain segment and indicates a first reference signal combination, and the first reference signal combination comprises one or more reference signals; wherein, different values of the preset domain segment in the signaling correspond to a plurality of reference signal combinations; all reference signals included in the plurality of reference signal combinations form a reference signal set, and the reference signal set comprises at least two reference signal groups; reference signal sequences for each reference signal in the at least two reference signal groups The method meets the following conditions:

And a processing unit, configured to generate and send the one or more reference signals.

26. The apparatus of claim 25, wherein the sequence c _g (·) satisfies:

27. The apparatus of claim 25, wherein the length of the sequence corresponding to the first set of orthogonal sequences is the same as the length of the sequence corresponding to the second set of orthogonal sequences.

28. The apparatus of claim 25, wherein when frequency resources of reference signals in the at least two reference signal groups comprise the same resource block, reference signal sequences corresponding to sequences of the first orthogonal sequence group and reference signal sequences corresponding to sequences of the second orthogonal sequence group are mapped on the same subcarrier in the same resource block.

29. The apparatus of claim 25, wherein the sequences of the first set of orthogonal sequences comprise the following sequences: {1,1}; {1, -1}; the sequences of the second orthogonal sequence set include the following sequences: {1,1i }; {1, -1i };

30. The apparatus of any one of claims 25 to 29, wherein the sequences of the first or second set of orthogonal sequences comprise the following sequences:

{1,1，1,1}；{1，-1,1，-1}；{1,1，-1，-1}；{1，-1，-1,1}；

{1,-1，-1i,-1i}；{1，1,-1i，1i}；{1,-1，1i，1i}；{1，1，1i,-1i}；

{1,-1i，-1i,-1}；{1，1i,-1i，1}；{1,-1i，1i，1}；{1，1i，1i,-1}；

{1,-1i，-1,-1i}；{1，1i,-1，1i}；{1,-1i，1，1i}；{1，1i，1,-1i}；

Where i is an imaginary unit.

31. The apparatus of any one of claims 25 to 29, wherein the sequences of the first or second set of orthogonal sequences comprise the following sequences:

Where i is an imaginary unit.

32. The apparatus of claim 25, wherein the length of the sequence corresponding to the first set of orthogonal sequences is 2 times the length of the sequence corresponding to the second set of orthogonal sequences.

33. The apparatus of claim 25, wherein when the frequency resources of the reference signals in the at least two reference signal groups comprise the same resource block, the reference signal sequences corresponding to the sequences of the first orthogonal sequence group are mapped to first subcarriers with medium intervals in the same resource block, the center frequency distance of adjacent subcarriers in the first subcarriers is k subcarriers, the reference signal sequences corresponding to the sequences of the second orthogonal sequence group are mapped to second subcarriers with medium intervals in the same resource block, the center frequency distance of adjacent subcarriers in the second subcarriers is 2k subcarriers, and k is a positive integer.

34. The apparatus of claim 32 or 33, wherein the sequences of the first set of orthogonal sequences comprise the following sequences:

{1,-1，-1i,-1i}；{1，1,-1i，1i}；{1,-1，1i，1i}；{1，1，1i,-1i}；

{1,-1i，-1i,-1}；{1，1i,-1i，1}；{1,-1i，1i，1}；{1，1i，1i,-1}；

{1,1}；{1,-1}；

Where i is an imaginary unit.

35. The apparatus of claim 32 or 33, wherein the sequences of the first set of orthogonal sequences comprise the following sequences:

{1,1,1,1}；{1,-1,1,-1}；{1,1,-1,-1}；{1,-1,-1,1}；

Where i is an imaginary unit.

36. The apparatus of claim 26, wherein the sequences in the second set of mask sequences comprise the following sequences:

{1,1}；{1,1i}。

37. A communication device, comprising:

The receiving and transmitting unit is used for sending or receiving a signaling, the signaling carries a preset domain segment and indicates a first reference signal combination, and the first reference signal combination comprises one or more reference signals; wherein, different values of the preset domain segment in the signaling correspond to a plurality of reference signal combinations; all reference signals included in the plurality of reference signal combinations form a reference signal set, and the reference signal set comprises at least two reference signal groups; reference signal sequences for each reference signal in the at least two reference signal groups The method meets the following conditions:

38. The apparatus of claim 37, wherein the sequence c _g (·) satisfies:

39. The apparatus of claim 37, wherein the length of the sequence corresponding to the first set of orthogonal sequences is the same as the length of the sequence corresponding to the second set of orthogonal sequences.

40. The apparatus of claim 37, wherein when frequency resources of reference signals in the at least two reference signal groups comprise the same resource block, reference signal sequences corresponding to sequences of the first orthogonal sequence group and reference signal sequences corresponding to sequences of the second orthogonal sequence group are mapped on the same subcarrier in the same resource block.

41. The apparatus of any one of claims 37 to 40, wherein the sequences of the first set of orthogonal sequences comprise the following sequences: {1,1}; {1, -1}; the sequences of the second orthogonal sequence set include the following sequences: {1,1i }; {1, -1i };

42. The apparatus of any one of claims 37 to 40, wherein the sequences of the first or second set of orthogonal sequences comprise the following sequences:

{1,1，1,1}；{1，-1,1，-1}；{1,1，-1，-1}；{1，-1，-1,1}；

{1,-1，-1i,-1i}；{1，1,-1i，1i}；{1,-1，1i，1i}；{1，1，1i,-1i}；

{1,-1i，-1i,-1}；{1，1i,-1i，1}；{1,-1i，1i，1}；{1，1i，1i,-1}；

43. The apparatus of any one of claims 37 to 40, wherein the sequences of the first or second set of orthogonal sequences comprise the following sequences:

Where i is an imaginary unit.

44. The apparatus of claim 37, wherein the length of the sequence corresponding to the first set of orthogonal sequences is 2 times the length of the sequence corresponding to the second set of orthogonal sequences.

45. The apparatus of claim 37, wherein when the frequency resources of the reference signals in the at least two reference signal groups comprise the same resource block, the reference signal sequences corresponding to the sequences of the first orthogonal sequence group are mapped to first subcarriers with medium intervals in the same resource block, the center frequency distance of adjacent subcarriers in the first subcarriers is k subcarriers, the reference signal sequences corresponding to the sequences of the second orthogonal sequence group are mapped to second subcarriers with medium intervals in the same resource block, the center frequency distance of adjacent subcarriers in the second subcarriers is 2k subcarriers, and k is a positive integer.

46. The apparatus of claim 44 or 45, wherein the sequences of the first set of orthogonal sequences comprise the following sequences:

{1,-1，-1i,-1i}；{1，1,-1i，1i}；{1,-1，1i，1i}；{1，1，1i,-1i}；

{1,-1i，-1i,-1}；{1，1i,-1i，1}；{1,-1i，1i，1}；{1，1i，1i,-1}；

{1,1}；{1,-1}；

Where i is an imaginary unit.

47. The apparatus of claim 44 or 45, wherein the sequences of the first set of orthogonal sequences comprise the following sequences:

{1,1,1,1}；{1,-1,1,-1}；{1,1,-1,-1}；{1,-1,-1,1}；

Where i is an imaginary unit.

48. The apparatus of claim 38, wherein the sequences in the second set of mask sequences comprise the following sequences:

{1,1}；{1,1i}。

49. A computer readable storage medium for storing a computer program which, when run on a computer, causes the computer to perform the method of any one of claims 1 to 12 or causes the computer to perform the method of any one of claims 13 to 24.