WO2022205022A1 - Procédé et appareil de transmission d'un signal de référence - Google Patents

Procédé et appareil de transmission d'un signal de référence Download PDF

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Publication number
WO2022205022A1
WO2022205022A1 PCT/CN2021/084207 CN2021084207W WO2022205022A1 WO 2022205022 A1 WO2022205022 A1 WO 2022205022A1 CN 2021084207 W CN2021084207 W CN 2021084207W WO 2022205022 A1 WO2022205022 A1 WO 2022205022A1
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sequence
resource
frequency domain
sequence set
elements
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PCT/CN2021/084207
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English (en)
Chinese (zh)
Inventor
曲秉玉
高翔
张哲宁
刘鹍鹏
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华为技术有限公司
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Priority to CN202180096582.6A priority Critical patent/CN117121414A/zh
Priority to PCT/CN2021/084207 priority patent/WO2022205022A1/fr
Publication of WO2022205022A1 publication Critical patent/WO2022205022A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management

Definitions

  • the present application relates to the field of communications, and more particularly, to a method and apparatus for transmitting a reference signal.
  • DMRS Demodulation reference signal
  • data channel such as Physical downlink shared channel, PDSCH
  • control channel such as Physical downlink control channel, PDCCH
  • DMRS resource mapping For Type 1 (Type 1) DMRS, a maximum of 8 orthogonal ports can be supported; for Type 2 (Type 2) DMRS, a maximum of 12 orthogonal ports can be supported. With the more intensive deployment of wireless communication equipment in the future, the number of terminal equipment will further increase.
  • the number of transmitting and receiving antennas will further increase (the number of transmitting antennas for network equipment supports 128T or 256T, and the number of receiving antennas for terminals supports 128T or 256T). 8R), more DMRS ports are bound to support a higher number of transport streams (greater than 12 streams).
  • the method is to increase the time-frequency resources occupied by the DMRS. This method can ensure that the number of resources occupied by the DMRS symbols corresponding to each DMRS port remains unchanged, however, the increase of the DMRS overhead will reduce the spectral efficiency of the system.
  • Another method is to multiplex more DMRS symbols corresponding to non-orthogonal DMRS ports under the condition of ensuring the same time-frequency resources (overhead).
  • the present application provides a method and apparatus for transmitting a reference signal, which can support more DMRS ports without increasing additional time-frequency resource overhead, improve system capacity, and ensure less damage to channel estimation performance.
  • a first aspect provides a method for transmitting a reference signal, the method may include: sending a first reference signal on a first resource; sending a second reference signal on a second resource, wherein the first resource corresponds to the first resource a time domain resource and a first frequency domain resource, the second resource corresponds to the first time domain resource and the second frequency domain resource, and the first frequency domain resource is smaller than the second frequency domain resource.
  • first reference signal and the second reference signal may represent one or more reference signal symbols, the one or more reference signal symbols are mapped to one or more time-frequency resources, and the reference signal may correspond to one or more ports , which is not limited in this application.
  • the first reference signal may correspond to an existing port, and the second reference signal may correspond to a newly added port.
  • the first reference signal corresponds to a first sequence
  • the second reference signal corresponds to a second sequence
  • the number of elements included in the first sequence is smaller than the number of elements included in the second sequence
  • the first sequence belongs to a first sequence set
  • the second sequence belongs to a second sequence set
  • the first sequence set includes at least one sequence
  • the second sequence set includes at least one sequence
  • the sequences included in the first sequence set include the same number of elements
  • the sequences included in the second sequence set include the same number of elements.
  • the average value of multiple values formed by the cross-correlation coefficient between any sequence in the first sequence set and any sequence in the second sequence set is less than or equal to the first threshold.
  • the cross-correlation coefficient between any sequence in the first sequence set and any sequence in the second sequence set is less than or equal to a first threshold, that is, the Each sequence has a low cross-correlation with each sequence in the second set of sequences.
  • the first threshold can be any possible way.
  • the first reference signal is generated according to the first sequence and the third sequence; the second reference signal is generated according to the second sequence and the fourth sequence.
  • the third sequence and the fourth sequence may be base sequences of reference signals, respectively.
  • the base sequence of the reference signal may be a pseudo-random sequence, such as a gold sequence or the like.
  • the above technical solution makes the sequences included in the two sequence sets exhibit low cross-correlation, that is, low cross-correlation between the DMRS signal corresponding to the existing port and the DMRS signal corresponding to any newly added port, thus ensuring that the existing The reusability of the port and the newly added port ensures that the interference between the DMRS signal corresponding to the existing DMRS port and the DMRS signal corresponding to the newly added port is minimized.
  • the first sequence and the second sequence may be mask sequences.
  • the first sequence and the second sequence may be orthogonal mask sequences.
  • the first sequence set includes multiple orthogonal mask sequences
  • the second sequence set includes multiple orthogonal mask sequences
  • the multiple sequences included in the first sequence set are orthogonal to each other
  • the multiple sequences included in the second sequence set are orthogonal to each other.
  • the low cross-correlation between sequences can be characterized by a cross-correlation coefficient, for example, the cross-correlation coefficient between the first sequence and the second sequence is less than or equal to a first threshold.
  • the cross-correlation coefficient can be determined by a vector formed by the elements of the sequence.
  • the cross-correlation coefficient can be calculated by the following formula,
  • ⁇ is the cross-correlation coefficient
  • L 1 and L 2 can be vectors composed of sequence elements of two sequences to be calculated
  • H can represent the conjugate transpose, which means the conjugate transpose of the matrix L 2 or the vector L 2
  • L 1 ⁇ L 2 means that the vector L 1 and the vector L 2 are multiplied.
  • sequence length of the first sequence is different from the sequence length of the second sequence, which can be expressed as a multiple relationship.
  • the sequence length of the second sequence may be three times the sequence length of the first sequence. The sequence length may be determined according to the number of elements included in the sequence.
  • the first sequence may be a sequence corresponding to an existing port
  • the second sequence may be a sequence corresponding to a newly added port
  • sequences with different lengths are designed to generate different reference signals, the same resource is reused, the number of ports is increased, and the number of ports is guaranteed. lower interference.
  • the first sequence set includes at least two sequences
  • the sequences included in the first sequence set are orthogonal to each other
  • the second sequence set includes at least two sequences
  • the second sequence set includes The sequences of are orthogonal to each other.
  • the above technical solution ensures the orthogonality between sequences within each sequence set, that is, there is no interference between DMRS signals corresponding to existing ports, and no interference between DMRS signals corresponding to newly added ports.
  • the cross-correlation coefficient between any sequence in the first sequence set and any sequence in the first subset of the second sequence set is zero, and the cross-correlation coefficient between any sequence in the second sequence set and the second sequence set is zero.
  • the average value of a plurality of numerical values formed by the cross-correlation coefficients between any sequences included except the first subset is less than or equal to the second threshold.
  • cross-correlation coefficient between any sequence in the first sequence set and any sequence in the first subset of the second sequence set is zero can also be understood as being zero in the first sequence set. Any sequence is orthogonal to any sequence in the first subset of the second set of sequences.
  • the cross-correlation coefficient between any sequence in the first sequence set and any sequence included in the second sequence set except the first subset is less than or equal to the The second threshold, that is, a low cross-correlation between each sequence in the first set of sequences and any sequence included in the second set of sequences except the first subset.
  • the second threshold can be any possible way.
  • first threshold and the second threshold may be configured by a high layer, and may also be predefined, which is not limited in this application.
  • the first subset may include half of the sequences in the second set of sequences, that is, any sequence in the first set of sequences and half of the sequences in the second set of sequences are mutually orthogonal, and The remaining half of the series showed low cross-correlation.
  • the above technical solution further realizes that the DMRS signals corresponding to the existing ports and the DMRS signals corresponding to half of the newly added ports are orthogonal to each other on the basis of ensuring low cross-correlation between the existing ports and the newly added ports, thereby ensuring the least damage to the channel estimation performance. .
  • the reference signal sequence of the second reference signal may satisfy the following relationship:
  • k is an integer from 0 to K-1
  • K is The total number of subcarriers occupied in the frequency domain
  • l is 0 or 1
  • ⁇ is a non-zero complex number
  • the number of elements included in the mask sequence w is I
  • r(k,l) is the element of the base sequence r mapped on the kth subcarrier and the lth symbol
  • c(t ) is a block sequence
  • sequences included in the second sequence set may be generated according to the first matrix and the second matrix.
  • a possible way is generated according to the following formula:
  • Table 4 An example, the mask sequence of length 12 generated according to this formula is shown in Table 4, which can include:
  • Table 10 An example, the mask sequence of length 12 generated according to this formula is shown in Table 10, which can include:
  • Table 11 An example, the mask sequence of length 12 generated according to this formula is shown in Table 11, which can include:
  • the above technical solutions provide a method for generating a mask sequence and elements specifically included in the mask sequence, which provide a basis for the application of the mask sequence.
  • the first resource includes 4 resource elements RE
  • the first time domain resource includes 2 OFDM symbols
  • the first frequency domain resource includes 2 consecutive
  • the second resource includes 12 REs
  • the second resource includes the 2 OFDM symbols
  • the second frequency domain resource includes 6 consecutive subcarriers
  • the first frequency domain resource is
  • the first resource includes four resource elements RE, the first time domain resource includes two OFDM symbols, the first frequency domain resource includes two consecutive subcarriers, and the first time domain resource includes two consecutive subcarriers.
  • the second resource includes 8 REs, the second time domain resource includes the 2 OFDM symbols, the second frequency domain resource includes 4 consecutive subcarriers, the first frequency domain resource and the second frequency domain resource include 4 consecutive subcarriers.
  • the intersection of domain resources is empty, that is, when the DMRS sequence corresponding to the existing port and the DMRS sequence corresponding to the newly added port are mapped, the frequency domain resources are not multiplexed.
  • the time domain resource may be the first symbol, and the first symbol may include one symbol or multiple symbols.
  • the frequency domain resources may be subcarriers.
  • sequence elements corresponding to the newly added ports may reuse the resources mapped by the sequence elements corresponding to the existing ports, or may not reuse the resources mapped by the sequence elements corresponding to the existing ports.
  • the above technical solution provides a way of using resources of existing ports and newly-added ports, which can be divided or reused, which improves the flexibility of resource use.
  • the elements included in any sequence in the first sequence set are in a one-to-one correspondence with the resource elements RE included in the first resource
  • the elements included in any sequence in the second sequence set are in one-to-one correspondence.
  • the elements are in one-to-one correspondence with the REs included in the second resource
  • the above technical solution provides a method for mapping elements on resources.
  • the elements included in one mask sequence are distributed on multiple REs, so that the joint noise reduction effect of multiple REs can be obtained and the accuracy of channel estimation can be improved.
  • a method for transmitting a reference signal may include: receiving a first reference signal on a first resource; receiving a second reference signal on a second resource, wherein the first resource corresponds to the first resource a time domain resource and a first frequency domain resource, the second resource corresponds to the first time domain resource and the second frequency domain resource, and the first frequency domain resource is smaller than the second frequency domain resource.
  • first reference signal and the second reference signal may represent one or more reference signal symbols, the one or more reference signal symbols are mapped to one or more time-frequency resources, and the reference signal may correspond to one or more ports , which is not limited in this application.
  • the first reference signal corresponds to a first sequence
  • the second reference signal corresponds to a second sequence
  • the number of elements included in the first sequence is smaller than the number of elements included in the second sequence
  • the first sequence belongs to a first sequence set
  • the second sequence belongs to a second sequence set
  • the first sequence set includes at least one sequence
  • the second sequence set includes at least one sequence
  • the sequences included in the first sequence set include the same number of elements
  • the sequences included in the second sequence set include the same number of elements.
  • the average value of multiple values formed by the cross-correlation coefficient between any sequence in the first sequence set and any sequence in the second sequence set is less than or equal to the first threshold.
  • the cross-correlation coefficient between any sequence in the first sequence set and any sequence in the second sequence set is less than or equal to a first threshold, that is, the Each sequence has a low cross-correlation with each sequence in the second set of sequences.
  • the first threshold can be any possible way.
  • the first reference signal is generated according to the first sequence and the third sequence; the second reference signal is generated according to the second sequence and the fourth sequence.
  • the third sequence and the fourth sequence may be base sequences of reference signals, respectively.
  • the base sequence of the reference signal may be a pseudo-random sequence, such as a gold sequence or the like.
  • the above technical solution makes the sequences included in the two sequence sets exhibit low cross-correlation, that is, low cross-correlation between the DMRS signal corresponding to the existing port and the DMRS signal corresponding to any newly added port, thus ensuring that the existing The reusability of the port and the newly added port ensures that the interference between the DMRS signal corresponding to the existing DMRS port and the DMRS signal corresponding to the newly added port is minimized.
  • the first sequence and the second sequence may be mask sequences.
  • the first sequence and the second sequence may be orthogonal mask sequences.
  • the first sequence set includes multiple orthogonal mask sequences
  • the second sequence set includes multiple orthogonal mask sequences
  • the multiple sequences included in the first sequence set are orthogonal to each other
  • the multiple sequences included in the second sequence set are orthogonal to each other.
  • the low cross-correlation can be characterized by a cross-correlation coefficient, for example, the cross-correlation coefficient between the first sequence and the second sequence is less than or equal to a first threshold.
  • the cross-correlation coefficient can be determined by a vector formed by the elements of the sequence.
  • the cross-correlation coefficient can be calculated by the following formula,
  • sequence length of the first sequence is different from the sequence length of the second sequence, which can be expressed as a multiple relationship.
  • the sequence length of the second sequence may be three times the sequence length of the first sequence. The sequence length may be determined according to the number of elements included in the sequence.
  • the first sequence may be a sequence corresponding to an existing port
  • the second sequence may be a sequence corresponding to a newly added port
  • sequences with different lengths are designed to generate different reference signals, the same resource is reused, the number of ports is increased, and the number of ports is also guaranteed. lower interference.
  • the first sequence set includes at least two sequences
  • the sequences included in the first sequence set are orthogonal to each other
  • the second sequence set includes at least two sequences
  • the second sequence set includes The sequences of are orthogonal to each other.
  • the above technical solution ensures the orthogonality between sequences within each sequence set, that is, there is no interference between DMRS signals corresponding to existing ports, and no interference between DMRS signals corresponding to newly added ports.
  • the cross-correlation coefficient between any sequence in the first sequence set and any sequence in the first subset of the second sequence set is zero, and the cross-correlation coefficient between any sequence in the second sequence set and the second sequence set is zero.
  • the average value of a plurality of numerical values formed by the cross-correlation coefficients between any sequences included except the first subset is less than or equal to the second threshold.
  • the second threshold can be any possible way.
  • cross-correlation coefficient between any sequence in the first sequence set and any sequence in the first subset of the second sequence set is zero can also be understood as being zero in the first sequence set. Any sequence is orthogonal to any sequence in the first subset of the second set of sequences.
  • the cross-correlation coefficient between any sequence in the first sequence set and any sequence included in the second sequence set except the first subset is less than or equal to the The second threshold, that is, a low cross-correlation between each sequence in the first set of sequences and any sequence included in the second set of sequences except the first subset.
  • first threshold and the second threshold may be configured by a high layer or defined manually, which is not limited in this application.
  • the first subset may include half of the sequences in the second set of sequences.
  • any sequence in the first sequence set is mutually orthogonal to half of the sequences in the second sequence set, and has low cross-correlation with the remaining half of the sequences.
  • the above technical solution further realizes that the DMRS signals corresponding to the existing ports and the DMRS signals corresponding to half of the newly added ports are orthogonal to each other on the basis of ensuring low cross-correlation between the existing ports and the newly added ports, thereby ensuring the minimum loss of channel estimation performance. .
  • the reference signal sequences of the second reference signal may respectively satisfy the following relationship:
  • k is an integer from 0 to K-1
  • K is The total number of subcarriers occupied in the frequency domain
  • l is 0 or 1
  • ⁇ is a non-zero complex number
  • the number of elements included in the mask sequence w is I
  • r(k,l) is the element of the base sequence r mapped on the kth subcarrier and the lth symbol
  • c(t ) is a block sequence
  • the sequence included in the second sequence set is a mask sequence
  • the sequence may be generated according to the first matrix and the second matrix.
  • Table 4 An example, the mask sequence of length 12 generated according to this formula is shown in Table 4, which can include:
  • Table 10 An example, the mask sequence of length 12 generated according to this formula is shown in Table 10, which can include:
  • Table 11 An example, the mask sequence of length 12 generated according to this formula is shown in Table 11, which can include:
  • the above technical solutions provide a method for generating a mask sequence and elements specifically included in the mask sequence, which provide a basis for the application of the mask sequence.
  • the first resource includes 4 resource elements RE
  • the first time domain resource includes 2 OFDM symbols
  • the first frequency domain resource includes 2 consecutive
  • the second resource includes 12 REs
  • the second resource includes the 2 OFDM symbols
  • the second frequency domain resource includes 6 consecutive subcarriers
  • the first frequency domain resource is
  • the number of elements included in the second sequence is 8, the first resource includes 4 resource elements RE, the first time domain resource includes 2 OFDM symbols, and the first resource includes 2 OFDM symbols.
  • the frequency domain resource includes 2 consecutive subcarriers, the second resource includes 8 REs, the second time domain resource includes the 2 OFDM symbols, and the second frequency domain resource includes 4 consecutive subcarriers , the intersection of the first frequency domain resource and the second frequency domain resource is empty, that is, when the DMRS sequence corresponding to the existing port and the DMRS sequence corresponding to the newly added port are mapped, the frequency domain resources are not multiplexed.
  • the time domain resource may be the first symbol, and the first symbol may include one symbol or multiple symbols.
  • the frequency domain resources may be subcarriers.
  • sequence elements corresponding to the newly added ports may reuse the resources mapped by the sequence elements corresponding to the existing ports, or may not reuse the resources mapped by the sequence elements corresponding to the existing ports.
  • the above technical solution provides a way of using resources of existing ports and newly-added ports, which can be divided or reused, which improves the flexibility of resource use.
  • the elements included in any sequence in the first sequence set are in a one-to-one correspondence with the resource elements RE included in the first resource
  • the elements included in any sequence in the second sequence set are in one-to-one correspondence.
  • the elements are in one-to-one correspondence with the REs included in the second resource
  • the above technical solution provides a method for mapping elements on resources.
  • the elements included in one mask sequence are distributed on multiple REs, so that the joint noise reduction effect of multiple REs can be obtained and the accuracy of channel estimation can be improved.
  • a communication device which is characterized by comprising a processing unit configured to determine a first resource and a second resource; a transceiver unit configured to send a first reference signal on the first resource, and send a first reference signal on the second resource. sending a second reference signal on the Time domain resources, including the second frequency domain resources in the frequency domain, the first frequency domain resources are a part of the second frequency domain resources, or, the first frequency domain resources and the second frequency domain resources Domain resource intersection is empty. .
  • the first reference signal corresponds to a first sequence
  • the second reference signal corresponds to a second sequence
  • the number of elements included in the first sequence is smaller than the number of elements included in the second sequence
  • the first sequence belongs to a first sequence set
  • the second sequence belongs to a second sequence set
  • the first sequence set includes at least one sequence
  • the second sequence set includes at least one sequence
  • the sequences included in the first sequence set include the same number of elements
  • the sequences included in the second sequence set include the same number of elements.
  • the sequences included in the first sequence set are orthogonal to each other, and the second sequence set includes at least two sequences.
  • the sequences included in the sequence set are orthogonal to each other.
  • the number of elements included in the second sequence is 12.
  • the reference signal sequence of the second reference signal elements mapped on the kth subcarrier and the lth symbol Satisfy the following relationship:
  • k is an integer from 0 to K-1
  • K is The total number of subcarriers occupied in the frequency domain
  • l is 0 or 1
  • ⁇ is a non-zero complex number
  • the number of elements included in the mask sequence w is I
  • r(k,l) is the element of the base sequence r mapped on the kth subcarrier and the lth symbol
  • c(t ) is a block sequence
  • any sequence included in the first sequence set is orthogonal to any sequence included in the first subset included in the second sequence set.
  • sequences included in the first subset are half of the sequences included in the second sequence set.
  • w k is the row vector corresponding to the kth sequence contained in the second sequence set
  • k is an integer from 0 to N-1
  • b satisfies the following relationship:
  • w k is the row vector corresponding to the kth sequence contained in the second sequence set, and k is an integer from 0 to N-1.
  • the first resource includes four resource elements RE, the first time domain resource includes two OFDM symbols, the first frequency domain resource includes two consecutive subcarriers, and the second The resource includes 12 REs, the second resource includes the 2 OFDM symbols, the second frequency domain resource includes 6 consecutive subcarriers, and the first frequency domain resource is the second frequency domain resource. Subset.
  • the number of elements included in the second sequence is 8.
  • the first resource includes four resource elements RE
  • the first time domain resource includes two OFDM symbols
  • the first frequency domain resource includes two consecutive subcarriers
  • the second The resource includes 8 REs
  • the second resource corresponds to the 2 OFDM symbols
  • the second frequency domain resource includes 4 consecutive subcarriers.
  • the elements included in any sequence in the first sequence set are in a one-to-one correspondence with the resource elements RE included in the first resource, and the elements included in any sequence in the second sequence set are in one-to-one correspondence. There is a one-to-one correspondence between elements and REs included in the second resource.
  • a communication apparatus may include a transceiver unit for receiving a first reference signal on a first resource and a second reference signal on a second resource; a processing unit for receiving a reference signal according to the reference signal Detecting a channel, wherein the first resource includes the first time domain resource in the time domain, includes the first frequency domain resource in the frequency domain, and the second resource includes the first time domain resource in the time domain resources, including the second frequency domain resource in the frequency domain, the first frequency domain resource is a part of the second frequency domain resource, or the first frequency domain resource and the second frequency domain resource The intersection is empty. .
  • the first reference signal corresponds to a first sequence
  • the second reference signal corresponds to a second sequence
  • the number of elements included in the first sequence is smaller than the number of elements included in the second sequence
  • the first sequence belongs to a first sequence set
  • the second sequence belongs to a second sequence set
  • the first sequence set includes at least one sequence
  • the second sequence set includes at least one sequence
  • the sequences included in the first sequence set include the same number of elements
  • the sequences included in the second sequence set include the same number of elements.
  • the sequences included in the first sequence set are orthogonal to each other, and the second sequence set includes at least two sequences.
  • the sequences included in the sequence set are orthogonal to each other.
  • the number of elements included in the second sequence is 12.
  • the reference signal sequence of the second reference signal elements mapped on the kth subcarrier and the lth symbol Satisfy the following relationship:
  • k is an integer from 0 to K-1
  • K is The total number of subcarriers occupied in the frequency domain
  • l is 0 or 1
  • ⁇ is a non-zero complex number
  • the number of elements included in the mask sequence w is I
  • r(k,l) is the element of the base sequence r mapped on the kth subcarrier and the lth symbol
  • c(t ) is a block sequence
  • any sequence included in the first sequence set is orthogonal to any sequence included in the first subset included in the second sequence set.
  • sequences included in the first subset are half of the sequences included in the second sequence set.
  • sequence included in the second sequence set is used as a matrix composed of row vectors Satisfy the following relationship:
  • w k is the row vector corresponding to the kth sequence contained in the second sequence set
  • k is an integer from 0 to N-1
  • b satisfies the following relationship:
  • w k is the row vector corresponding to the kth sequence contained in the second sequence set, and k is an integer from 0 to N-1.
  • the first resource includes four resource elements RE, the first time domain resource includes two OFDM symbols, the first frequency domain resource includes two consecutive subcarriers, and the second The resource includes 12 REs, the second resource includes the 2 OFDM symbols, the second frequency domain resource includes 6 consecutive subcarriers, and the first frequency domain resource is the second frequency domain resource. Subset.
  • the number of elements included in the second sequence is 8.
  • the first resource includes four resource elements RE
  • the first time domain resource includes two OFDM symbols
  • the first frequency domain resource includes two consecutive subcarriers
  • the second The resource includes 8 REs
  • the second resource corresponds to the 2 OFDM symbols
  • the second frequency domain resource includes 4 consecutive subcarriers.
  • the elements included in any sequence in the first sequence set are in a one-to-one correspondence with the resource elements RE included in the first resource, and the elements included in any sequence in the second sequence set are in one-to-one correspondence. There is a one-to-one correspondence between elements and REs included in the second resource.
  • an apparatus including a processor.
  • the processor is coupled to the memory and is operable to execute instructions in the memory to cause the apparatus to perform the first aspect or the second aspect, or any of the first aspects, or any of the second aspects, or the first aspect A method in all possible implementations in one aspect, or in all possible implementations in the second aspect.
  • the apparatus further includes a memory.
  • the apparatus further includes an interface circuit, and the processor is coupled to the interface circuit.
  • a processor including: an input circuit, an output circuit, and a processing circuit.
  • the processing circuit is configured to receive signals through the input circuit and transmit signals through the output circuit, causing the processor to perform the first aspect or, the second aspect, or any of the first aspects, or any of the second aspects methods in all possible implementations of the first aspect, or all possible implementations of the second aspect.
  • the above-mentioned processor may be a chip
  • the input circuit may be an input pin
  • the output circuit may be an output pin
  • the processing circuit may be a transistor, a gate circuit, a flip-flop, and various logic circuits.
  • the input signal received by the input circuit may be received and input by, for example, but not limited to, a receiver
  • the signal output by the output circuit may be, for example, but not limited to, output to and transmitted by a transmitter
  • the circuit can be the same circuit that acts as an input circuit and an output circuit at different times.
  • the embodiments of the present application do not limit the specific implementation manners of the processor and various circuits.
  • a processing apparatus including a processor and a memory.
  • the processor is configured to read instructions stored in the memory, and may receive signals through a receiver and transmit signals through a transmitter to perform the first aspect or the second aspect, or any one of the first aspects, or the second aspect A method in any one, or all of the first aspect, or all possible implementations of the second aspect.
  • the processing device in the above seventh aspect may be a chip, and the processor may be implemented by hardware or software.
  • the processor When implemented by hardware, the processor may be a logic circuit, an integrated circuit, or the like; when implemented by software, the processor may be a logic circuit or an integrated circuit.
  • the processor can be a general-purpose processor, which is realized by reading software codes stored in a memory, and the memory can be integrated in the processor or located outside the processor and exist independently.
  • a computer program product comprising: a computer program (also referred to as code, or instructions), when the computer program is executed, causes the computer to execute the above-mentioned first aspect or, the second Aspect, or any one of the first aspect, or any one of the second aspect, or all of the first aspect, or a method in all possible implementations of the second aspect.
  • a computer program also referred to as code, or instructions
  • a computer-readable medium stores a computer program (also referred to as code, or instruction) when it runs on a computer, causing the computer to execute the above-mentioned first aspect or, the first The second aspect, or any one of the first aspect, or any one of the second aspect, or all of the first aspect, or a method in all possible implementations of the second aspect.
  • a computer program also referred to as code, or instruction
  • FIG. 1 is a schematic diagram of a communication system provided by an embodiment of the present application.
  • Figure 2 is a pilot pattern for two configuration types in the current standard.
  • FIG. 3 , FIG. 5 , and FIG. 8 show several examples of DMRS patterns provided by the embodiments of the present application.
  • FIG. 4 , FIG. 6 , and FIG. 7 show several examples of sequence element mapping patterns provided by the embodiments of the present application.
  • FIG. 9 is a schematic flowchart of a solution for transmitting a reference signal provided by an embodiment of the present application.
  • FIG. 10 is a schematic flowchart of an interaction system applying a transmission reference signal scheme provided by an embodiment of the present application.
  • FIG. 11 is a schematic diagram of a communication apparatus provided by an embodiment of the present application.
  • FIG. 12 is a schematic diagram of a network device provided by an embodiment of the present application.
  • FIG. 13 is a schematic diagram of a terminal device provided by an embodiment of the present application.
  • the wireless communication systems mentioned in the embodiments of this application include, but are not limited to: Global System of Mobile communication (GSM) system, Code Division Multiple Access (Code Division Multiple Access, CDMA) system, Wideband Code Division Multiple Access (Wideband Code Division Multiple Access, WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced Long Term Evolution (LTE-A) system, LTE Frequency Division Duplex (Frequency Division Duplex, FDD) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system, fifth generation ( fifth-generation, 5G) communication system, fusion system of multiple access systems, or evolution system, three major application scenarios of 5G mobile communication system eMBB, URLLC and eMTC or new communication systems that will appear in the future.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet
  • the network device involved in the embodiments of this application may be any device with a wireless transceiver function or a chip that can be provided in the device, and the device includes but is not limited to: an evolved Node B (evolved Node B, eNB), a wireless network Controller (Radio Network Controller, RNC), Node B (Node B, NB), Base Station Controller (Base Station Controller, BSC), Base Transceiver Station (Base Transceiver Station, BTS), Home Base Station (for example, Home evolved NodeB, Or Home Node B, HNB), baseband unit (BaseBand Unit, BBU), access point (Access Point, AP), wireless relay node, wireless backhaul node, transmission in Wireless Fidelity (Wireless Fidelity, WIFI) system Point (transmission point, TP) or transmission and reception point (transmission and reception point, TRP) or remote radio head (remote radio head, RRH), etc., can also be 5G, such as NR, gNB in the system,
  • a gNB may include a centralized unit (CU) and a DU.
  • the gNB may also include an active antenna unit (active antenna unit, AAU for short).
  • the CU implements some functions of the gNB, and the DU implements some functions of the gNB.
  • the CU is responsible for processing non-real-time protocols and services, and implementing functions of radio resource control (RRC) and packet data convergence protocol (PDCP) layers.
  • RRC radio resource control
  • PDCP packet data convergence protocol
  • the DU is responsible for processing physical layer protocols and real-time services, and implementing the functions of the radio link control (RLC) layer, the media access control (MAC) layer and the physical (PHY) layer.
  • RLC radio link control
  • MAC media access control
  • PHY physical layer
  • the higher-layer signaling such as the RRC layer signaling
  • the network device may be a device including one or more of a CU node, a DU node, and an AAU node.
  • the CU can be divided into network devices in an access network (radio access network, RAN), and the CU can also be divided into network devices in a core network (core network, CN), which is not limited in this application.
  • a network device can be used as a scheduling device.
  • the network device may include, but is not limited to, an LTE base station eNB, an NR base station gNB, an operator, etc., and its functions may include, for example, configuring uplink and downlink resources,
  • DCI downlink control information
  • the network device can also be used as a sending device.
  • the network device may include, but is not limited to, TRP and RRH, and its functions may include, for example, sending downlink signals and receiving uplink signals.
  • the terminal equipment involved in the embodiments of this application may also be referred to as user equipment (user equipment, UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, Terminal, wireless communication device, user agent or user equipment.
  • user equipment user equipment
  • UE user equipment
  • access terminal subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, Terminal, wireless communication device, user agent or user equipment.
  • the terminal device in the embodiment of the present application may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiver function, a wearable device, a virtual reality (virtual reality, VR) terminal device, an augmented reality (augmented reality) , AR) terminal equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical, wireless terminals in smart grid , wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, and so on.
  • the embodiments of the present application do not limit application scenarios.
  • the aforementioned terminal equipment and the chips that can be provided in the aforementioned terminal equipment are collectively referred to as terminal equipment.
  • the functions of the terminal device may include, but are not limited to, for example, receiving downlink/sidelink signals, and/or sending uplink/sidelink signals.
  • This application takes the physical downlink control channel PDCCH as an example to describe the downlink control channel, takes the physical downlink shared channel PDSCH as an example to describe the downlink data channel, and takes the carrier as an example to describe the frequency domain unit , taking a time slot as an example to describe the time unit in the 5G system, the time slot involved in this application may also be a transmission time interval TTI and/or a time unit and/or a subframe and/or a mini-slot.
  • FIG. 1 is a schematic diagram of a communication system using the present application to transmit information.
  • the communication system 100 includes a network device 102 , which may include a plurality of antennas, eg, antennas 104 , 106 , 108 , 110 , 112 , and 114 .
  • the network device 102 may additionally include a transmitter chain and a receiver chain, each of which may include various components (eg, processors, modulators, multiplexers) related to signal transmission and reception, as will be understood by those of ordinary skill in the art. , demodulator, demultiplexer or antenna, etc.).
  • Network device 102 may communicate with a plurality of end devices (eg, end device 116 and end device 122). It will be appreciated, however, that network device 102 may communicate with any number of end devices similar to end devices 116 or 122 .
  • Terminal devices 116 and 122 may be, for example, cellular telephones, smart phones, laptop computers, handheld communication devices, handheld computing devices, satellite radios, global positioning systems, PDAs, and/or any other suitable device for communicating over wireless communication system 100 . equipment.
  • end device 116 communicates with antennas 112 and 114 that transmit information to end device 116 over forward link 118 and receive information from end device 116 over reverse link 120 .
  • terminal device 122 communicates with antennas 104 and 106 , which transmit information to terminal device 122 via forward link 124 and receive information from terminal device 122 via reverse link 126 .
  • forward link 118 may use a different frequency band than reverse link 120, and forward link 124 may use a different frequency band than reverse link 126. frequency band.
  • FDD Frequency Division Duplex
  • the forward link 118 and the reverse link 120 may use a common frequency band, and the forward link 124 and the reverse link 120 may use a common frequency band.
  • Links 126 may use a common frequency band.
  • Each antenna (or group of antennas) and/or area designed for communication is referred to as a sector of network device 102 .
  • an antenna group may be designed to communicate with terminal devices in sectors of the network device 102 coverage area.
  • the transmit antenna of network device 102 may utilize beamforming to improve the signal-to-noise ratio of forward links 118 and 124.
  • the network device 102 uses beamforming to transmit to the terminal devices 116 and 122 randomly dispersed in the associated coverage area, the Mobile devices will experience less interference.
  • network device 102, end device 116, or end device 122 may be a wireless communication transmitter and/or a wireless communication receiver.
  • the wireless communication transmitting device may encode the data for transmission.
  • the wireless communication transmitting device may acquire (eg, generate, receive from other communication devices, or store in memory, etc.) a certain number of data bits to be transmitted over the channel to the wireless communication receiving device.
  • Such data bits may be contained in a transport block (or transport blocks) of data, which may be segmented to produce multiple code blocks.
  • the communication system 100 may be a public land mobile network (full name in English may be: Public Land Mobile Network, abbreviation in English may be: PLMN) network or D2D network or M2M network or other network
  • FIG. 1 is only a simplified schematic diagram of an example, the network It may also include other network equipment, which is not shown in FIG. 1 .
  • the sending device may be the above-mentioned network device 102 or a terminal device (for example, the terminal device 116 or the terminal device 122 ), and correspondingly, the receiving end device may be the above-mentioned terminal device ( For example, the terminal device 116 or the terminal device 122) may also be the network device 102, which is not particularly limited in this application.
  • the DMRS is used as an example to perform signal transmission in the embodiments of the present application, and other signal types applicable to the embodiments of the present application are all within the protection scope of the present application, which is not particularly limited in the present application.
  • Antenna ports are referred to as ports for short. It can be understood as a transmitting antenna recognized by the receiving end, or a transmitting antenna that can be distinguished in space.
  • One antenna port may be configured for each virtual antenna, and each virtual antenna may be a weighted combination of multiple physical antennas. According to different signals carried, the antenna ports can be divided into reference signal ports and data ports.
  • the reference signal ports include, but are not limited to, demodulation reference signal (DMRS) ports, channel state information reference signal (CSI-RS) ports, and the like.
  • This application includes existing ports and new ports.
  • Existing ports refer to ports in existing protocols or ports that support technical solutions in existing protocols; new ports refer to ports that can support the technical solutions of the present application. .
  • time-frequency resources may include resources in the time domain and resources in the frequency domain.
  • the time-frequency resources may include one or more time-domain units (or may also be referred to as time units, time units), and in the frequency domain, the time-frequency resources may include one or more frequency-domain units .
  • One time domain unit may be one symbol or several symbols (such as orthogonal frequency division multiplexing (OFDM) symbols), or a mini-slot (mini-slot), or a time slot (slot). ), or a subframe, where the duration of a subframe in the time domain may be 1 millisecond (ms), a slot consists of 7 or 14 symbols, and a mini slot may include at least one symbols (eg, 2 symbols or 7 symbols or 14 symbols, or any number of symbols less than or equal to 14 symbols).
  • OFDM orthogonal frequency division multiplexing
  • mini-slot mini-slot
  • time slot time slot
  • mini slot may include at least one symbols (eg, 2 symbols or 7 symbols or 14 symbols, or any number of symbols less than or equal to 14 symbols).
  • a frequency domain unit can be a resource block (RB), or a subcarrier (subcarrier), or a resource block group (RBG), or a predefined subband (subband), or a A precoding resource block group (PRG), or a bandwidth part (BWP), or a resource element (RE) (or resource element), or a carrier, or a serving cell.
  • RB resource block
  • RBG resource block group
  • PRG precoding resource block group
  • BWP bandwidth part
  • RE resource element
  • the transmission unit mentioned in the embodiments of this application may include any one of the following: a time-domain unit, a frequency-domain unit, or a time-frequency unit.
  • the transmission unit mentioned in the embodiments of this application may be replaced by a time-domain unit, It can also be replaced by a frequency domain unit, and can also be replaced by a time-frequency unit.
  • the transmission unit may also be replaced by a transmission opportunity.
  • the time domain unit may include one or more OFDM symbols, or the time domain unit may include one or more slots, and so on.
  • the frequency domain unit may include one or more RBs, or the frequency domain unit may include one or more subcarriers, and so on.
  • multiple parallel data streams can be simultaneously transmitted on the same time-frequency resource, and each data stream is called a spatial layer or spatial stream.
  • DMRS Demodulation Reference Signal
  • the DMRS is used to estimate the equivalent channel matrix experienced by a data channel (eg PDSCH) or control channel (eg PDCCH) for detection and demodulation of data.
  • a data channel eg PDSCH
  • control channel eg PDCCH
  • the DMRS usually performs the same precoding as the transmitted data signal, so as to ensure that the DMRS and the data experience the same equivalent channel.
  • the DMRS vector sent by the sender is s
  • the data symbol vector sent by the sender is x
  • the DMRS and data are subjected to the same precoding operation (multiplied by the same precoding matrix P)
  • the corresponding received signal vector at the receiver can be expressed as
  • the experienced equivalent channels are Based on the known DMRS vector s, the receiver can use channel estimation algorithms (such as least squares LS channel estimation, minimum mean square error MMSE channel estimation, etc.) to obtain the equivalent channel. 's estimate. MIMO equalization and subsequent demodulation of the data signal can be accomplished based on the equivalent channel.
  • channel estimation algorithms such as least squares LS channel estimation, minimum mean square error MMSE channel estimation, etc.
  • DMRS Downlink Reference Signal
  • R the number of transport streams (rank).
  • one DMRS port corresponds to one spatial layer.
  • R the required number of DMRS ports.
  • different DMRS ports are orthogonal ports.
  • the DMRS symbols corresponding to different DMRS ports are orthogonal in the frequency domain, time-frequency or code domain.
  • 5G NR supports two types of DMRS resource mapping.
  • Type 1 For Type 1 (Type 1) DMRS, a maximum of 8 orthogonal ports can be supported; for a Type 2 (Type 2) DMRS, a maximum of 12 orthogonal ports can be supported. Therefore, currently, NR can only support MIMO transmission of up to 12 streams.
  • the DMRS is an important reference signal for detection by the receiver.
  • the DMRS is sent along with the transmitted data channel (PDSCH).
  • the NR DMRS ports are orthogonal DMRS ports, that is, the DMRS symbols corresponding to different DMRS ports are frequency division multiplexed and/or code division multiplexed.
  • a DMRS port in order to perform channel estimation on different time-frequency resources and ensure the quality of channel estimation, it is necessary to send multiple DMRS symbols in multiple time-frequency resources.
  • the sending device (for example, the first sending device) may be a network device (for example, an access network device) or a terminal device, which is not particularly limited in this application.
  • a network device for example, an access network device
  • a terminal device which is not particularly limited in this application.
  • the sending device is a network device, it can perform the actions performed by the network device in the following description; when the sending device is a terminal device, it can perform the actions performed by the terminal device in the following description.
  • the receiving device (for example, the first receiving device) may be a network device (for example, an access network device) or a terminal device, which is not particularly limited in this application.
  • the receiving device is a network device
  • the following description can be performed The actions performed by the network device in the description below; when the receiving device is a terminal device, the actions performed by the terminal device in the following description can be performed.
  • FIG. 9 shows a schematic interaction diagram of a method 200 for transceiving a reference signal according to an embodiment of the present application.
  • the transmission device #A ie, an example of the first transmission device
  • DMRS #A ie, an example of the first DMRS
  • the process of generating the DMRS#A may be similar to that in the prior art, and the detailed description thereof is omitted here in order to avoid redundant description.
  • the DMRS #A is a DMRS of type #A (ie, an example of the first type).
  • the transmitting device #A can determine the antenna port of the DMRS #A, which is hereinafter denoted as: antenna port #A for ease of understanding and distinction. It should be noted that the antenna port #A is only used to correspond to the DMRS #A, and does not limit the number of antenna ports, that is, the antenna port #A may represent one or more antenna ports.
  • the antenna port of the DMRS may be determined by the network device and delivered to the terminal device by means of RRC signaling, MAC signaling, or physical layer signaling (such as DCI signaling, etc.). of. Therefore, when the sending device #A is a network device, the sending device #A can determine the antenna port #A by itself; when the sending device #A is a terminal device, the sending device #A can indicates that the antenna port #A is determined.
  • the antenna port #A is an antenna port that can be supported by the sending device #A, including existing ports and newly added ports.
  • the UE may report the capability of supporting the newly added port, and the network device may allocate the port to the UE based on the reported capability.
  • the antenna port of the first DMRS is determined from all antenna ports supported by the transmitting device.
  • the sending device can support multiple antenna ports, and specifically, can support sending signals (for example, DMRS) through each antenna port of the multiple antenna ports.
  • sending signals for example, DMRS
  • each type of DMRS can only be transmitted through the antenna port corresponding to this type of DMRS.
  • the antenna port of the DMRS may correspond to the antenna port index, and the antenna port corresponding to the DMRS may be 0, 1, 2, ..., 11, or may be 1000, 1001, 1002, ..., 1011. Or the index of the antenna port corresponding to the DMRS may be 0, 1, 2, ..., 11, or the index of the antenna port corresponding to the DMRS may be 1000, 1001, 1002, ..., 1011.
  • each type of DMRS can be sent through any one of all antenna ports supported by the sending device.
  • the antenna ports in the configuration pattern may not be bound with the type of DMRS, or in other words, each type of DMRS may be sent through any antenna port in the configuration pattern.
  • the configuration pattern may be a formula, a table or a diagram representing a rule for mapping sequence elements and time-frequency resources, which is not limited in this application. It should also be understood that the configuration pattern may be indicated by the network device, or may be predefined, which is not limited in this application.
  • the transmitting device #A can support all antenna ports in the configuration pattern.
  • the transmitting device #A may transmit DMRS #A using antenna ports a and b in one time period and transmit DMRS #A using antenna ports e and f in another time period.
  • sending device #A can notify the antenna port index and/or the number of antenna ports used by DMRS #A through RRC signaling, MAC signaling, or physical layer signaling. receiving device.
  • sending device #A may determine the antenna port index and/or the number of antenna ports used by DMRS#A by receiving RRC signaling, MAC signaling, or physical layer signaling, etc., where DMRS The antenna port index and/or the number of antenna ports used by #A are determined by the network device and notified to the terminal device. It should be noted that the terminal device needs to report the maximum number of antenna ports or the maximum number of layers that the device can support to the network device in advance, so that the network device can determine the number of antenna ports or the number of antenna ports that the terminal device can support.
  • the receiving device of the DMRS #A (that is, an example of the first receiving device, hereinafter, for ease of understanding and description, referred to as: receiving device #A) can determine the antenna port #A, and receive
  • the process by which device #A determines the antenna port #A may be similar to the process by which the transmitting device #A determines the antenna port #A, that is, when the receiving device #A is a network device, the receiving device #A can determine the antenna port # by itself.
  • the receiving device #A is a terminal device, the receiving device #A can determine the antenna port #A according to the indication of the network device to which it is connected.
  • the sending device #A may search for a configuration pattern based on the antenna port #A, so as to determine the time-frequency resource corresponding to the antenna port #A (ie, an example of the first time-frequency resource, hereinafter, for ease of understanding and description) , denoted as: time-frequency resource #A), map DMRS #A to time-frequency resource #A, and send the DMRS #A through antenna port #A.
  • time-frequency resource #A ie, an example of the first time-frequency resource, hereinafter, for ease of understanding and description
  • the system time-frequency resources can be divided into multiple basic time-frequency resource units (for example, one or more RBs or one or more RE), the time-frequency resource #A may be located on all basic time-frequency resource units in the system time-frequency resource, or may be located on some basic time-frequency resource units in the system time-frequency resource, for example, the time-frequency resource #A It is located on one RB or multiple RBs in the system time-frequency resource, which is not particularly limited in this application.
  • time-frequency Resource #A1 in addition to the DMRS #A, all or part of the time-frequency resources (for example, all or part of the REs) that exist in the time-frequency resource #A also carry one or more other DMRSs ( For example, the following DMRS#B and/or DMRS#C), hereinafter, in order to facilitate understanding and distinction, some or all of the time-frequency resources that bear at least two types of DMRS on time-frequency resource #A are denoted as: time-frequency Resource #A1.
  • the DMRS #A and the other one or more DMRSs may use, for example, code division multiplexing to multiplex the time-frequency resource #A1.
  • the sending device #A can determine the code resource corresponding to the DMRS #A (for example, the CDM code, hereinafter, for ease of understanding and distinction, denoted as: code resource #A).
  • code resource #A the code resource corresponding to the DMRS #A
  • code resource #A can be understood as DMRS#A is multiplexed on time-frequency resource #A1 based on the code resource #A.
  • the maximum number of DMRS ports multiplexed on the same time-frequency resource may be determined based on the length of the code resource. For example, if the length of the code resource is 4, the maximum number of DMRS ports can be determined. 4 DMRSs are supported to be multiplexed in the same time-frequency resource. If the length of the code resource is 8, 8 DMRSs can be supported to be multiplexed in the same time-frequency resource.
  • the code resource corresponding to each DMRS may be determined by a network device (which can be used as a DMRS sending device or a receiving device) and notified to a terminal device (which can be used as a DMRS sending device or receiving device).
  • the code resource corresponding to each DMRS may be preset, and the code resource corresponding to each DMRS corresponds to the DMRS port index.
  • the code resource corresponding to each type of DMRS may be specified by a communication system or a communication protocol, so that the type of DMRS actually sent and or the port index corresponding to the actually sent DMRS can be determined.
  • Code resource corresponding to DMRS may be specified by a communication system or a communication protocol, so that the type of DMRS actually sent and or the port index corresponding to the actually sent DMRS can be determined.
  • the code resource #A is orthogonal to code resources (eg, CDM codes) corresponding to other DMRSs (eg, DMRS #B and/or DMRS #C described later) carried on time-frequency resource #A1. Therefore, the sending device #A can also multiplex the DMRS #A on the time-frequency resource #A1 based on the code resource #A.
  • code resources eg, CDM codes
  • the receiving device #A may search for a configuration pattern based on the antenna port #A, thereby determining the time-frequency resource #A corresponding to the antenna port #A, and receive the DMRS #A through the time-frequency resource #A , and the process of determining the time-frequency resource #A by the receiving device #A may be similar to the process of determining the time-frequency resource #A by the transmitting device #A, and the detailed description thereof is omitted here to avoid redundant description.
  • the receiving device #A can also determine the code resource #A, and obtain the DMRS #A from the time-frequency resource #A1 based on the code resource #A, and the process of determining the code resource #A by the receiving device #A can be the same as that of the sending device #A.
  • a process for determining the code resource #A is similar, and the detailed description thereof is omitted here in order to avoid redundant description.
  • code resource #A is used on time-frequency resource #A1
  • the same code resource #A can also be used on other time-frequency resources except time-frequency resource #A1 in time-frequency resource #A.
  • sequences in this application may be used for DMRS, and may also be used for other reference signals, such as CSI-RS, CRS, SRS, etc., which are not limited in this application.
  • the DMRS may occupy at least one OFDM symbol in the time domain, and the bandwidth occupied in the frequency domain is the same as the scheduling bandwidth of the scheduled data signal.
  • Multiple DMRS symbols corresponding to one port correspond to one DMRS base sequence, and one DMRS base sequence includes multiple DMRS base sequence elements. Taking the DMRS base sequence corresponding to the existing port as an example, the nth element in the DMRS base sequence can be generated by the following formula:
  • the DMRS base sequence r(n) generated based on the gold sequence can satisfy the following formula:
  • c(n) is a pseudo-random sequence
  • generation formula is:
  • N C 1600
  • l is an orthogonal frequency division multiplexing (OFDM) symbol index in a time slot, is the slot index within a system frame, is the number of OFDM symbols in a time slot, N ID 0 , N ID 1 ⁇ ⁇ 0, 1, 2, 3, 4, 5, 6... ⁇ , the values are all integers, and can be configured by high-layer signaling. It is related to the cell ID (identification), which can usually be equal to the cell ID. For initialization parameters, the value can be 0 or 1.
  • ⁇ represents the code division multiplexing (CDM) group index corresponding to the DMRS port.
  • an OFDM symbol may also be referred to as a symbol for short. If there is no special description, the symbol hereinafter refers to an OFDM symbol.
  • the DMRS base sequence corresponding to one port is multiplied by the corresponding mask sequence and then mapped to the corresponding time-frequency resource through a preset time-frequency resource mapping rule.
  • two types of DMRS configuration methods are defined, including Type 1 DMRS and Type 2 DMRS.
  • the m-th element r(m) in the corresponding DMRS base sequence is mapped to a resource element (RE) with an index of (k, l) p, ⁇ according to the following rules.
  • the RE with index (k, l) p, ⁇ corresponds to the OFDM symbol with index l in one slot in the time domain, and corresponds to the subcarrier with index k in the frequency domain, and the mapping rules satisfy:
  • p is the index of the DMRS port, is the symbol index of the starting OFDM symbol occupied by the DMRS modulation symbol or the symbol index of the reference OFDM symbol
  • w f (k') is the frequency domain mask sequence element corresponding to the subcarrier with index k'
  • w t (l') is the time-domain mask sequence element corresponding to the OFDM symbol with index l'
  • the reference signal sequence corresponding to the newly added port is elements mapped on the kth subcarrier and the lth symbol Satisfy the following relationship:
  • k is an integer from 0 to K-1
  • K is The total number of subcarriers occupied in the frequency domain
  • l is 0 or 1
  • ⁇ is a non-zero complex number
  • the number of elements included in the mask sequence w is I
  • r(k,l) is the element of the base sequence r mapped on the kth subcarrier and the lth symbol, the base sequence r
  • the production method of can be as shown in formula (1).
  • a mod B represents the modulo operation, which is used to represent the remainder obtained by dividing A by B. It can also be recorded as A%B or mod(A,B), and floor(A) represents the rounding operation of A, which is used for Represents the largest integer not greater than A.
  • each element in the block sequence corresponds to a sequence block composed of a mask sequence with a length of 1.
  • Particles each correspond to an element in the block sequence.
  • the I elements contained in the mask sequence w(i) all correspond to one element in the block sequence.
  • the cross-correlation between long sequences composed of multiple sequence blocks can be guaranteed to be low, thereby reducing interference.
  • the values of w f (k'), wt (l') and ⁇ corresponding to the existing DMRS port p may be determined according to Table 1.
  • the values of w f (k'), wt (l') and ⁇ corresponding to the existing DMRS port p can be determined according to Table 2.
  • ⁇ is the index of the code division multiplexing group (CDM group) to which the existing port p belongs, and the time-frequency resources occupied by the DMRS ports in the same CDM group are the same.
  • the time-frequency resource mapping mode of Type1 DMRS is shown in (a) of FIG. 2 .
  • CDM group 0 includes port 0 and port 1
  • CDM group 1 includes port 2 and port 3.
  • CDM group 0 and CDM group 1 are frequency division multiplexed (mapped on different frequency domain resources).
  • the DMRS ports included in the CDM group are mapped on the same time-frequency resources.
  • the reference signal sequences corresponding to the DMRS ports included in the CDM group are distinguished by the mask sequence, thereby ensuring the orthogonality of the DMRS ports in the CDM group, thereby suppressing the interference between the DMRSs transmitted on different antenna ports.
  • port 0 and port 1 are located in the same resource element (RE), and resource mapping is performed in a comb-tooth manner in the frequency domain. That is, the adjacent frequency domain resources occupied by port 0 and port 1 are separated by one subcarrier.
  • the occupied adjacent two REs correspond to a mask sequence of length 2.
  • port 0 and port 1 use a set of mask sequences of length 2 (+1+1 and +1-1).
  • port 2 and port 3 are located in the same RE, and are mapped on the REs not occupied by port 0 and port 1 in a comb-tooth manner in the frequency domain.
  • port 2 and port 3 use a set of mask sequences of length 2 (+1+1 and +1-1).
  • p in the table of this application is the port index
  • the port whose port index is 1000 can be port 0 or port
  • the port whose port index is 1001 can be port 1 or port 1
  • ... the port whose port index is 100X Can be port X or port X.
  • CDM group 0 includes port 0, port 1, port 4, and port 5; CDM group 1 includes port 2, port 3, port 6, and port 7.
  • CDM group 0 and CDM group 1 are frequency division multiplexed.
  • the DMRS ports included in the CDM group are mapped on the same time-frequency resources.
  • the reference signal sequences corresponding to the DMRS ports included in the CDM group are distinguished by mask sequences.
  • port 0, port 1, port 4, and port 5 are located in the same RE, and resource mapping is performed in the frequency domain in a comb-tooth manner, that is, adjacent frequencies occupied by port 0, port 1, port 4, and port 5 are The domain resources are spaced by one subcarrier.
  • the occupied adjacent 2 subcarriers and 2 OFDM symbols correspond to a mask sequence with a length of 4.
  • port 0, port 1, port 4 and port 5 use a set of mask sequences of length 4 (+1+1+1+1/ +1+1-1-1/+1-1+1-1/+1-1-1+1).
  • port 2, port 3, port 6 and port 7 are located in the same RE, and are mapped on the unoccupied subcarriers of port 0, port 1, port 4 and port 5 in a comb-tooth manner in the frequency domain.
  • port 2, port 3, port 6 and port 7 use a set of mask sequences of length 4 (+1+1+1+1/+1 +1-1-1/+1-1+1-1/+1-1-1+1).
  • CDM group 0 includes port 0 and port 1; CDM group 1 includes port 2 and port 3; CDM group 2 includes port 4 and port 5.
  • Frequency division multiplexing is used between CDM groups, and the DMRS corresponding to the DMRS ports included in the CDM group are mapped on the same time-frequency resources.
  • the reference signal sequences corresponding to the DMRS ports included in the CDM group are distinguished by mask sequences.
  • its corresponding DMRS reference signal is mapped in a plurality of resource sub-blocks including two consecutive sub-carriers in the frequency domain, and the adjacent resource sub-blocks are separated by 4 sub-carriers in the frequency domain.
  • port 0 and port 1 are located in the same RE, and resource mapping is performed in a comb-tooth manner in the frequency domain.
  • resource mapping is performed in a comb-tooth manner in the frequency domain.
  • port 0 and port 1 occupy subcarrier 0, subcarrier 1, subcarrier 6 and subcarrier 7.
  • Port 2 and port 3 occupy sub-carrier 2, sub-carrier 3, sub-carrier 8 and sub-carrier 9.
  • Port 4 and port 5 occupy sub-carrier 4, sub-carrier 5, sub-carrier 10 and sub-carrier 11.
  • For two DMRS ports included in one CDM group they correspond to a mask sequence of length 2 (+1+1 and +1-1) in two adjacent subcarriers.
  • DMRS resources occupy two OFDM symbols.
  • the 12 DMRS ports are divided into 3 CDM groups, of which CDM group 0 includes port 0, port 1, port 6 and port 7; CDM group 1 includes port 2, port 3, port 8 and port 9; CDM group 2 includes port 4 , port 5, port 10, and port 11.
  • Frequency division multiplexing is used between CDM groups, and the DMRS corresponding to the DMRS ports included in the CDM group are mapped on the same time-frequency resources.
  • the reference signal sequences corresponding to the DMRS ports included in the CDM group are distinguished by mask sequences.
  • its corresponding DMRS reference signal is mapped in a plurality of resource sub-blocks including two consecutive sub-carriers in the frequency domain, and the adjacent resource sub-blocks are separated by 4 sub-carriers in the frequency domain.
  • port 0, port 1, port 6, and port 7 are located in the same RE, and resource mapping is performed in a comb-tooth manner in the frequency domain.
  • resource mapping is performed in a comb-tooth manner in the frequency domain.
  • port 0, port 1, port 6, and port 7 occupy subcarrier 0, subcarrier 1, subcarrier 6, and subcarrier 7 corresponding to OFDM symbol 0 and OFDM symbol 1.
  • port 2, port 3, port 8, and port 9 occupy subcarrier 2, subcarrier 3, subcarrier 8, and subcarrier 9 corresponding to OFDM symbol 1 and OFDM symbol 2.
  • port 4, port 5, port 10, and port 11 occupy subcarrier 4, subcarrier 5, subcarrier 10, and subcarrier 11 corresponding to OFDM symbol 1 and OFDM symbol 2.
  • 4 DMRS ports included in a CDM group it corresponds to a mask sequence of length 4 (+1+1+1+1/+1+1- 1-1/+1-1+1-1/+1-1-1+1).
  • the mask sequence is used as an example in this embodiment of the present application as an encoding to characterize the orthogonality of transmission data, and other applicable encodings are also within the protection scope of the present application, which is not limited in the present application.
  • the transmitting end device transmits the reference signal of the existing port (that is, the first reference signal) and the reference signal of the newly added port (that is, the second reference signal) on the same resource, and the receiving end device is in the The reference signal of the existing port and the reference signal of the newly added port are received on the same block of resources, and channel estimation is performed according to the reference signal sequence corresponding to each reference signal.
  • each DMRS port is divided into 3 CDM groups.
  • the basic frequency domain granularity of its time-frequency resource mapping is 6 consecutive subcarriers.
  • the 6 consecutive subcarriers and 2 OFDM symbols are divided into 3 time-frequency resource subblocks, and each time-frequency resource subblock includes 2 consecutive subcarriers and 2 OFDM symbols.
  • the three time-frequency resource sub-blocks are frequency-division multiplexed.
  • the reference signal sequences corresponding to the four DMRS ports included in each CDM group are multiplied by a mask sequence with a length of 4 and then mapped onto all REs included in the same resource sub-block.
  • DMRS port 1 in the time-frequency resource block composed of 12 REs shown in Figure 3, 4 REs corresponding to 2 consecutive subcarriers and 2 OFDM symbols are occupied, and the corresponding mask sequence of length 4 is + 1, -1, +1, -1.
  • the present application designs a set of mask sequences with a length of 12, wherein one mask sequence set includes 12 mask sequences. Each mask sequence contains 12 elements. Each mask sequence corresponds to a new DMRS port, so at least 12 new DMRS ports can be added.
  • the set of mask sequences may contain 12 mask sequences, and each mask sequence may contain 12 elements.
  • the matrix B corresponds to the set of mask sequences, wherein the 12 mask sequences included in the set of mask sequences correspond to the 12 row vectors in the matrix B one-to-one. Any two mask sequences contained in the mask sequence set B are orthogonal.
  • the DMRS mask sequences of length 12 generated according to formula (6.A), formula (6.B) and formula (6.C) are shown in Table 3, Table 4 and Table 5, respectively.
  • the tables in this application are only used as examples rather than limitations.
  • the correspondence between indexes and elements in the table may also be other correspondences, and the correspondence between the sequence index in the table and the row vector corresponding to a row in the table.
  • the relationship may also be other correspondence, the correspondence between the sequence index and the mask sequence in the table may also be other correspondence, the elements listed in the table may be part, may be all, and so on.
  • the mask sequence can include
  • the mask sequence can include
  • the mask sequence can include ⁇ 1,j,1,j,1,j,1,j,1,j,1,j ⁇ ,
  • each mask sequence corresponds to a DMRS port, so a total of 12 DMRS ports are added (hereinafter referred to as new ports) .
  • One element included in each sequence corresponds to one RE included in the time-frequency resource block shown in FIG. 4 .
  • a DMRS port corresponds to a mask sequence with a length of 12 in Table 3, Table 4 or Table 5, and the corresponding rules of the mask sequence element index and the time-frequency resource RE are shown in FIG. 4 .
  • a mask sequence contains 12 elements, corresponding to the mask sequence element indices 0-11.
  • the numbers marked in each RE in Figure 4 represent the indices of the mask sequence elements.
  • the mask sequence elements corresponding to the mask sequence element indices 0 to 5 in Table 3, Table 4 or Table 5 correspond to the 6 subcarriers of the first OFDM symbol respectively; the mask sequence element indices 6 to 11 in Table 3 and Table 4
  • the corresponding mask sequence elements respectively correspond to the 6 subcarriers of the second OFDM symbol.
  • FIG. 4 is only an example and not a limitation, and FIG. 4 may be a diagram of a part of REs or all REs, that is, subcarriers 0 to 5 in the figure may represent any set of resource blocks, and symbols 0 to 1 may also be are other two consecutive OFDM symbols, which are not limited in this application.
  • the multiplexing relationship between the newly added DMRS port and the existing NR Type 2 DMRS port in the time-frequency resource blocks of the above 12 REs is shown in Figure 5 shown.
  • the existing 12 ports of NR Type 2 DMRS are mapped according to the existing protocol time-frequency resource mapping method.
  • One DMRS port corresponds to a mask sequence of length 4, which is mapped on two consecutive subcarriers.
  • the corresponding port indices 12 to 23 are multiplexed on all 12 REs using different 12-long mask sequences.
  • DMRS port 0 uses a mask sequence of length 4, which is mapped on subcarrier 0 and subcarrier 1 corresponding to two OFDM symbols.
  • the DMRS port 12 adopts a mask sequence with a length of 12, which is mapped on subcarriers 0 to 5 corresponding to two OFDM symbols.
  • the first element in the sequence corresponds to the RE with index 0
  • the second element corresponds to the RE with index 1
  • the third element corresponds to the RE with index 2, and so on.
  • any two mask sequences are orthogonal, that is, the 12-length mask sequences corresponding to any two ports in the newly added ports are Orthogonal.
  • the mask sequence corresponding to any one of the existing Type 2 DMRS ports is pairwise orthogonal to the six mask sequences in the new 12 mask sequences shown in Table 3, Table 4 or Table 5 , and the cross-correlation coefficient with any one of the remaining 6 mask sequences is Specifically, the existing NR Type 2 DMRS ports are arranged in the time-frequency resource block composed of the above 12 REs according to the mask sequence element index and the time-frequency resource correspondence rule shown in FIG. 4 , and the existing NR Type 2 DMRS ports correspond to The mask sequence of can be expressed as:
  • the corresponding DMRS mask sequence length extended to 12 can be expressed as ⁇ +1 +1 0 0 0 0 +1 +1 0 0 0 ⁇ .
  • This sequence is orthogonal to the new mask sequence whose sequence index is 6 to 11 in Table 3, Table 4 or Table 5, and is orthogonal to the new mask sequence whose sequence index is 0 to 5 in Table 3, Table 4 or Table 5.
  • the correlation coefficient is Taking the new mask sequence whose sequence index is 0 in Table 3 as an example, its cross-correlation coefficient with the DMRS mask sequence corresponding to the existing NR Type 2 DMRS port 0 is:
  • half of the sequences are orthogonal to the mask sequences corresponding to the existing DMRS ports, and the other half of the mask sequences corresponding to the existing DMRS ports maintain low cross-correlation properties. , so that the quality of the channel estimation can be guaranteed to the greatest extent.
  • the m-th element r(m) in the DMRS base sequence corresponding to port p in the newly added 12 DMRS ports is mapped to the RE with index (k,l) p, ⁇ according to the following rules .
  • the RE with index (k, l) p, ⁇ corresponds to the OFDM symbol with index l in one slot in the time domain, and corresponds to the subcarrier with index k in the frequency domain, and the mapping rules satisfy:
  • p is the index of the DMRS port, is the symbol index of the starting OFDM symbol occupied by the DMRS modulation symbol or the symbol index of the reference OFDM symbol
  • w f (k') is the frequency domain mask sequence element corresponding to the subcarrier with index k'
  • w t (l') is the time-domain mask sequence element corresponding to the OFDM symbol with index l'
  • c(n) is the element of the block sequence mapped on the kth subcarrier and the lth symbol.
  • the new design length is 12 mask sequences corresponding to the mapping rules (corresponding to Table 3)
  • the new design length is 12 mask sequences corresponding to the mapping rules (corresponding to Table 4)
  • the new design length is 12 mask sequences corresponding to the mapping rules (corresponding to Table 5)
  • N is twice the number of RBs included in the bandwidth occupied by the DMRS signal in the frequency domain, and v may be a number relatively prime to N.
  • the embodiment of the present application expands the port of NR Type 2 DMRS.
  • the existing NR Type 2 DMRS port and the newly added DMRS port respectively use a mask sequence with a length of 4 and a mask sequence with a length of 12. mask sequence.
  • any two sequences of the 12 mask sequences of length 12 are orthogonal.
  • Any one of the mask sequences of length 4 is orthogonal to one half of the set of mask sequences of length 12, and guarantees low cross-correlation with the remaining half of the sequences. Therefore, the capacity of the DMRS port can be doubled without increasing the time-frequency resources, and the interference between the original port and the newly added port of the protocol can be minimized, and the quality of the channel estimation can be guaranteed.
  • a set of mask sequences with a length of 12 is designed, and the mask sequences contained in the set of mask sequences are matrices in the form of row vectors The following relationship can be satisfied:
  • the DMRS mask sequences of length 12 generated according to Equation (9.A) and Equation (9.B) are shown in Table 10 and Table 11, respectively.
  • the mask sequence can include:
  • the mask sequence can include:
  • each mask sequence corresponds to one DMRS port, so a total of 12 DMRS ports are added (hereinafter referred to as newly added ports).
  • One element included in each sequence corresponds to one RE included in the time-frequency resource block shown in FIG. 4 .
  • a mask sequence contains 12 elements, corresponding to the indices of the mask sequence elements from 0 to 11.
  • the numbers marked in each RE in Figure 6 represent the indices of the mask sequence elements.
  • the mask sequence elements corresponding to the mask sequence element indices 0, 2, 4, 6, 8, and 10 in Table 10 or Table 11 correspond to subcarriers 0, 1, 2, 3, 4, and 5 of the first OFDM symbol, respectively.
  • Mask sequence elements corresponding to mask sequence element indices 1, 3, 5, 7, 9, and 11 in Table 10 or Table 11 correspond to subcarriers 0, 1, 2, 3, 4, and 5 of the second OFDM symbol, respectively .
  • the multiplexing relationship between the newly added DMRS port and the existing NR Type 2 DMRS port in the time-frequency resource blocks of the above 12 REs is shown in Figure 5 shown.
  • the existing 12 ports of NR Type 2 DMRS are mapped according to the existing protocol time-frequency resource mapping method.
  • One DMRS port corresponds to a mask sequence of length 4, which is mapped on two consecutive subcarriers.
  • the corresponding port indices 12 to 23 are multiplexed on all 12 REs using different 12-long mask sequences.
  • DMRS port 0 uses a mask sequence of length 4, which is mapped on subcarrier 0 and subcarrier 1 corresponding to two OFDM symbols.
  • the DMRS port 12 adopts a mask sequence with a length of 12, which is mapped on subcarriers 0 to 5 corresponding to two OFDM symbols.
  • any two mask sequences are orthogonal, that is, the 12-length mask sequences corresponding to any two ports in the newly added ports are orthogonal .
  • the cross-correlation coefficient between the mask sequence corresponding to any one of the existing Type 2 DMRS ports and any one of the new 12 mask sequences shown in Table 10 or Table 11 is:
  • the corresponding DMRS mask sequence extended to a length of 12 can be expressed as ⁇ +1 +1 0 0 0 0 +1 +1 0 0 0 ⁇ .
  • the cross-correlation coefficient between this sequence and any of the new mask sequences in Table 8 or Table 11 is Therefore, for the mask sequence corresponding to the newly designed DMRS port, the mask sequence corresponding to the existing DMRS port maintains an extremely low cross-correlation characteristic, so that the quality of the channel estimation can be guaranteed to the maximum extent.
  • the m-th element r(m) in the DMRS sequence corresponding to port p in the newly added 12 DMRS ports is mapped to the resource element RE with index (k,l) p, ⁇ according to the following rules superior.
  • the RE with index (k, l) p, ⁇ corresponds to the OFDM symbol with index l in one slot in the time domain, and corresponds to the subcarrier with index k in the frequency domain, and the mapping rules satisfy:
  • p is the index of the DMRS port, is the symbol index of the starting OFDM symbol occupied by the DMRS modulation symbol or the symbol index of the reference OFDM symbol
  • w(k', l') is the frequency domain mask element corresponding to the subcarrier with index k' and the index of the subcarrier with index l' Time-domain mask element corresponding to the OFDM symbol.
  • ⁇ represents the subcarrier spacing parameter, is the power scaling factor.
  • the value of w(k', l') corresponding to the DMRS port p can be determined according to Table 12.
  • the new design length is 12 mask sequences corresponding to the mapping rules (corresponding to Table 10)
  • the value of w(k', l') corresponding to the DMRS port p can be determined according to Table 13.
  • the new design length is 12 mask sequences corresponding to the mapping rules (corresponding to Table 11)
  • N is twice the number of RBs included in the bandwidth occupied by the DMRS signal in the frequency domain, and v may be a number relatively prime to N.
  • the present application aims at the port expansion method of NR Type 2 DMRS.
  • the existing NR Type 2 DMRS port and the newly added DMRS port respectively adopt a mask sequence of length 4 and a mask of length 12 sequence.
  • any two sequences of the 12 mask sequences of length 12 are orthogonal.
  • Any sequence in the mask sequence of length 4 and any sequence in the set of mask sequences of length 12 guarantee extremely low cross-correlation. Therefore, the capacity of the DMRS port can be doubled without increasing the time-frequency resources, and the interference between the original port and the newly added port of the protocol can be minimized, and the quality of the channel estimation can be guaranteed.
  • the existing ports and the new DMRS ports can also be combined.
  • the additional ports are multiplexed by frequency division. For example, for Type 2 DMRS, 12 DMRS ports are divided into 3 CDM groups. The six consecutive subcarriers and two OFDM symbols are divided into three time-frequency resource subblocks, and each time-frequency resource subblock includes two consecutive subcarriers and two OFDM symbols. In an implementation manner, one time-frequency resource sub-block corresponds to one CDM group. As shown in FIG.
  • the DMRS signals corresponding to the four DMRS ports included in each CDM group are mapped on all REs included in the same resource sub-block.
  • the existing DMRS ports belong to 4 DMRS ports included in 1 CDM group among 3 CDM groups, the existing ports occupy one sub-block of the 3 time-frequency resource sub-blocks, and the newly added ports can occupy The remaining 2 sub-blocks in the 3 time-frequency resource sub-blocks.
  • existing ports 0 to 3 correspond to CDM group 0, and are mapped to two consecutive subcarriers (subcarrier 0 and subcarrier 1) and two consecutive OFDM symbols ( On the 4 REs corresponding to symbol 0 and symbol 1).
  • existing ports 0 to 3 can be assigned to existing devices (existing devices cannot learn about newly added ports, and do not have the ability to detect newly added ports).
  • the newly added ports 4 to 19 correspond to CDM group 1, and are mapped to four consecutive subcarriers (subcarrier 2, subcarrier 3, subcarrier 4, and subcarrier 5) and two consecutive subcarriers based on an orthogonal mask sequence of length 8. 8 REs corresponding to OFDM symbols (symbol 0 and symbol 1).
  • the newly added ports 4 to 19 can be assigned to new devices (the newly added ports can be known and the newly added ports can be detected).
  • the existing port is mapped to two consecutive subcarriers (subcarrier 4 and subcarrier 5) and two consecutive OFDM symbols (symbol 0 and symbol 1) based on an orthogonal mask sequence of length 4 on the corresponding 4 REs.
  • existing ports can be allocated to existing devices (existing devices cannot learn about newly added ports, and do not have the ability to detect newly added ports).
  • the new port is mapped to four consecutive subcarriers (subcarrier 0, subcarrier 1, subcarrier 2, and subcarrier 3) and two consecutive OFDM symbols (symbol 0 and symbol 1) based on an orthogonal mask sequence of length 8 ) on the corresponding 8 REs.
  • the newly added port can be assigned to a new device (it can learn about the newly added port and have the ability to detect the newly added port).
  • the existing DMRS ports belong to the 8 DMRS ports included in 2 CDM groups in the 3 CDM groups, the existing ports can occupy 2 sub-blocks in the 3 time-frequency resource sub-blocks, and the new ports can be added. It can occupy the remaining 1 sub-block in the 3 time-frequency resource sub-blocks.
  • the existing DMRS ports occupy CDM group 0 and CDM group 1, that is, the existing DMRS ports are mapped to four consecutive subcarriers (subcarrier 0, subcarrier 1, subcarrier 2, and subcarrier 3).
  • the newly added DMRS ports occupy CDM group 2, that is, the existing DMRS ports are mapped to two consecutive subcarriers (subcarrier 4 and subcarrier 5).
  • the existing DMRS ports occupy CDM group 1 and CDM group 2, that is, the existing DMRS ports are mapped to four consecutive subcarriers (subcarrier 2, subcarrier 3, subcarrier 4, and subcarrier 5).
  • the newly added DMRS ports occupy CDM group 0, that is, the existing DMRS ports are mapped to two consecutive subcarriers (subcarrier 0 and subcarrier 1).
  • the existing DMRS port belongs to the 4 DMRS ports included in 1 CDM group among the 3 CDM groups, the existing port occupies one sub-block of the 3 time-frequency resource sub-blocks, and the newly added port can occupy 3 time-frequency resource sub-blocks.
  • multiple mask sequence sets with a length of 8 can also be designed, wherein one mask sequence set contains 8 mask sequences. Each mask sequence corresponds to a newly added DMRS port.
  • 8 DMRS ports can be added.
  • 16 DMRS ports can be added.
  • the orthogonal mask sequences included in the mask sequence set with a length of 8 are shown in Table 14 to Table 16.
  • Each mask sequence in the new set of mask sequences of length 8 shown in Tables 14 to 16 corresponds to a DMRS port (hereinafter referred to as newly added ports).
  • One element included in each sequence corresponds to one RE included in the time-frequency resource block shown in FIG. 7 .
  • the corresponding rules of the mask sequence element index and the time-frequency resource RE are shown in FIG. 8 .
  • the mask sequence elements corresponding to the mask sequence element indices 0 to 3 in Tables 14 to 16 correspond to the 4 subcarriers of the first OFDM symbol respectively; the mask sequence elements corresponding to the mask sequence element indices 4 to 7 in Tables 14 to 16
  • the code sequence elements correspond to the 4 subcarriers of the second OFDM symbol respectively.
  • FIG. 8 is an example and not a limitation, and the mask sequence elements may also follow other mapping rules.
  • the 8 elements contained in a sequence with a length of 8 may be mapped on subcarriers 0 to 3, and the existing ports correspond to
  • the 4 elements included in the sequence of length 4 may be mapped on subcarriers 4 to 5, which are not limited in this application.
  • the DMRS port corresponding to the mask sequence of length 8 (newly designed mask sequence) and the DMRS port corresponding to the mask sequence of length 4 (the existing mask sequence of NR length 4) are mapped by frequency division multiplexing In the time-frequency resource block of 12 REs.
  • the correspondence between the DMRS ports and the mask sequence sets and REs included in the time-frequency resource block is shown in FIG. 8 .
  • the 4 REs composed of subcarrier 0 and subcarrier 1 corresponding to OFDM symbol 0 and symbol 1 the DMRS symbols corresponding to the 4 DMRS ports are mapped, and the 4 REs correspond to the existing mask sequences with NR length 4 respectively.
  • the DMRS symbols corresponding to 16 DMRS ports are mapped, corresponding to port indices 4 to 19, and different 8-length mask sequences are used for multiplexing. on all 8 REs.
  • DMRS port 0 adopts a mask sequence with a length of 4, which is mapped on subcarrier 0 and subcarrier 1 corresponding to two OFDM symbols.
  • the DMRS port 4 adopts a mask sequence with a length of 8, which is mapped on the subcarriers 2 to 5 corresponding to the two OFDM symbols.
  • any two mask sequences in each mask sequence set are orthogonal.
  • each mask sequence set selects a mask sequence, then the cross-correlation coefficient between the two mask sequences is
  • a mask sequence group with a length of 4 is reserved, which can be used to be compatible with the existing NR Type 2 DMRS.
  • a new mask sequence group with a length of 8 is added, and the cross-correlation between the mask sequences in this sequence group is low, so that it can ensure that more DMRS ports are multiplexed in fixed time-frequency resources at the same time. , to ensure the channel estimation performance.
  • the port p in the 20 DMRS ports corresponds to the mth r(m) in the DMRS sequence, and is mapped to the RE with the index (k,l) p, ⁇ according to the following rules.
  • the RE with index (k, l) p, ⁇ corresponds to the OFDM symbol with index l in one slot in the time domain, and corresponds to the subcarrier with index k in the frequency domain
  • the mapping rules satisfy:
  • p is the index of the DMRS port, to map to the DMRS modulation symbol corresponding to port p on the RE with index (k,l) p, ⁇ , is the symbol index of the starting OFDM symbol occupied by the DMRS modulation symbol or the symbol index of the reference OFDM symbol, w(k', l') is the mask sequence corresponding to the OFDM symbol with index l' and the subcarrier with index k' element.
  • ⁇ represents the subcarrier spacing parameter, is the power scaling factor.
  • N is twice the number of RBs included in the bandwidth occupied by the DMRS signal in the frequency domain, and v may be a number relatively prime to N.
  • NR Type 2 DMRS For the port expansion method of NR Type 2 DMRS, in the same time-frequency resource block, 6 subcarriers are divided into 2 time-frequency resource subgroups by frequency division, one subgroup contains 4 REs, the other The subgroup contains the remaining 8 REs.
  • a mask sequence with a length of 4 is used to map 4 DMRS ports correspondingly.
  • 2 sets of mask sequences with a length of 8 are used to map 16 DMRS ports, or 3 sets of mask sequences with a length of 8 are used to map 24 DMRS ports.
  • any two sequences in each set of length 8 mask sequences are orthogonal.
  • Very low cross-correlation is guaranteed between any two mask sequences of length 8 belonging to different groups. Therefore, without increasing the time-frequency resources, it can achieve 0.6 times or 1.3 times the capacity expansion of the DMRS ports while ensuring compatibility with the existing DMRS ports, and minimize the interference between the newly added ports to ensure channel estimation. the quality of.
  • FIG. 11 is a schematic diagram of a communication apparatus provided by an embodiment of the present application.
  • the communication apparatus 2000 may include a receiving unit 2100 and a sending unit 2200 .
  • the communication apparatus may further include a processing unit 2200 .
  • the receiving unit 2100 may be a receiver, an input interface, a pin or a circuit, and the like.
  • the receiving unit 2100 may be configured to perform the receiving steps in the foregoing method embodiments.
  • the sending unit 2200 may be a transmitter, an output interface, a pin or a circuit, and the like.
  • the sending unit 2200 may be configured to perform the receiving steps in the above method embodiments.
  • the receiving unit 2100 and the transmitting unit 2200 may be combined as a transceiver unit.
  • the transceiving unit may include a transmitting unit and/or a receiving unit.
  • the transceiver unit may be a transceiver (including a transmitter and/or a receiver), an input/output interface (including an input and/or output interface), a pin or a circuit, and the like.
  • the processing unit 2300 may be a processor (which may include one or more), a processing circuit with a processor function, etc., and may be used to perform other steps in the foregoing method embodiments except for sending and receiving.
  • the communication device may further include a storage unit, which may be a memory, an internal storage unit (eg, a register, a cache, etc.), an external storage unit (eg, a read-only memory, a random access memory, etc.), etc. .
  • the storage unit is used for storing instructions, and the processing unit 530 executes the instructions stored in the storage unit, so that the communication device executes the above method.
  • the communication apparatus 2000 may correspond to the receiving device in the above method embodiment, and may perform the operations performed by the receiving device in the above method.
  • the receiving unit 2100 is configured to receive a reference signal, and perform channel estimation after decoding.
  • the communication apparatus 2000 may correspond to the sending device in the above method embodiment, and may perform the operations performed by the sending device in the above method.
  • the processing unit 2300 generates a check sequence, maps the root sequence and the check sequence to corresponding time-frequency resources, and generates a reference signal.
  • the generation method of the sequence is the same as the above, and will not be repeated here.
  • the transmitting unit 2200 transmits the reference signal.
  • the processing unit generates a check sequence with a length of 12, which is mapped to 6 consecutive subcarriers and 2 OFDM symbols, any sequence contains 12 elements, and any element is mapped to a single RE
  • the REs mapped by elements within the same sequence are different from each other.
  • the processing unit generates a check sequence with a length of 8, which is mapped to 6 consecutive subcarriers and 2 OFDM symbols, any sequence contains 8 elements, and any element is mapped to a separate one
  • the REs mapped to elements in the same sequence are different from each other, and the REs mapped to the existing four ports are also different from each other. That is, REs are no longer multiplexed.
  • processing unit may be implemented by hardware or software, or may be implemented by a combination of software and hardware.
  • the receiving unit 2100 and the sending unit 2200 in the communication device may correspond to the RRU 3100 in the network device 2000 shown in FIG. 12
  • the processing unit 2300 in the communication device It may correspond to the BBU 3200 in the network device 2000 shown in FIG. 28 .
  • the transceiver unit 2100 in the communication apparatus may be an input/output interface.
  • the receiving unit 2100 and the sending unit 2200 in the communication device 2000 may correspond to the transceiver 4002 in the terminal device 4000 shown in FIG.
  • the processing unit 2300 may correspond to the processor 4001 in the terminal device 4000 shown in FIG. 13 .
  • FIG. 12 is a schematic structural diagram of a network device provided by an embodiment of the present application, which may be, for example, a schematic structural diagram of a base station.
  • the network device 3000 may perform the functions of the network device in the foregoing method embodiments.
  • the network device 3000 may include one or more radio frequency units, such as a remote radio unit (remote radio unit, RRU) 3100 and one or more baseband units (BBU) (also referred to as distributed units ( DU))3200.
  • RRU remote radio unit
  • BBU baseband units
  • DU distributed units
  • the RRU 3100 may be called a transceiver unit or a communication unit, which corresponds to the transceiver unit 2100 in FIG. 11 .
  • the transceiver unit 3100 may also be referred to as a transceiver, a transceiver circuit, or a transceiver, etc., which may include at least one antenna 3101 and a radio frequency unit 3102 .
  • the transceiver unit 3100 may include a receiving unit and a sending unit, the receiving unit may correspond to a receiver (or called a receiver, a receiving circuit), and the sending unit may correspond to a transmitter (or called a transmitter, a sending circuit).
  • the RRU 3100 part is mainly used for the transceiver of radio frequency signals and the conversion of radio frequency signals and baseband signals.
  • the part of the BBU 3200 is mainly used to perform baseband processing, control the base station, and the like.
  • the RRU 3100 and the BBU 3200 may be physically set together, or may be physically separated, that is, a distributed base station.
  • the BBU 3200 is the control center of the base station, and can also be called a processing unit, which can correspond to the processing unit 2200 in FIG. 11 , and is mainly used to complete baseband processing functions, such as channel coding, multiplexing, modulation, spread spectrum, and the like.
  • the BBU processing unit
  • the BBU may be used to control the base station to perform the operation procedures related to the network device in the foregoing method embodiments.
  • the BBU 3200 may be composed of one or more boards, and the multiple boards may jointly support a wireless access network (such as an LTE network) of a single access standard, or may respectively support a wireless access network of different access standards.
  • Wireless access network (such as LTE network, 5G network or other network).
  • the BBU 3200 also includes a memory 3201 and a processor 3202.
  • the memory 3201 is used to store necessary instructions and data.
  • the processor 3202 is configured to control the base station to perform necessary actions, for example, to control the base station to perform the operation flow of the network device in the foregoing method embodiments.
  • the memory 3201 and processor 3202 may serve one or more single boards. That is to say, the memory and processor can be provided separately on each single board. It can also be that multiple boards share the same memory and processor. In addition, necessary circuits may also be provided on each single board.
  • the network device 3000 shown in FIG. 12 can implement various processes related to the network device in the foregoing method embodiments.
  • the operations or functions of each module in the network device 3000 are respectively to implement the corresponding processes in the foregoing method embodiments.
  • the above-mentioned BBU 3200 may be used to perform the actions performed by the network device described in the foregoing method embodiments, and the RRU 3100 may be used to perform the actions of sending and receiving by the network device described in the foregoing method embodiments.
  • the RRU 3100 may be used to perform the actions of sending and receiving by the network device described in the foregoing method embodiments.
  • FIG. 13 is a schematic structural diagram of a terminal device 4000 provided by an embodiment of the present application.
  • the terminal device 4000 includes a processor 4001 and a transceiver 4002 .
  • the terminal device 4000 may further include a memory 4003 .
  • the processor 4001, the transceiver 4002 and the memory 4003 can communicate with each other through an internal connection path to transmit control and/or data signals, the memory 4003 is used to store computer programs, and the processor 4001 is used to retrieve data from the memory 4003.
  • the computer program is invoked and executed to control the transceiver 4002 to send and receive signals.
  • the above-mentioned processor 4001 and the memory 4003 can be combined into a processing device 4004, and the processor 4001 is configured to execute the program codes stored in the memory 4003 to realize the above-mentioned functions. It should be understood that the processing device 4004 shown in the figure is only an example. During specific implementation, the memory 4003 may also be integrated in the processor 4001 or independent of the processor 4001 . This application does not limit this.
  • the above-mentioned terminal device 4000 may further include an antenna 4010 for transmitting the uplink data or uplink control signaling output by the transceiver 4002 through wireless signals.
  • the terminal device 4000 shown in FIG. 13 can implement various processes related to the terminal device in the foregoing method embodiments.
  • the operations or functions of each module in the terminal device 4000 are respectively to implement the corresponding processes in the above method embodiments.
  • the above-mentioned terminal device 4000 may further include a power supply 4005 for providing power to various devices or circuits in the terminal device.
  • the terminal device 4000 may further include one or more of an input unit 4006, a display unit 4007, an audio circuit 4008, a camera 4009, a sensor 4011, etc., the audio circuit A speaker 40081, a microphone 40082, and the like may also be included.
  • the processing device 4004 or the processor 4001 may be a chip.
  • the processing device 4004 or the processor 4001 may be a field programmable gate array (FPGA), a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (application specific integrated circuit) integrated circuit, ASIC), off-the-shelf programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and can also be a system on chip (system on chip, SoC), It can also be a central processing unit (CPU), a network processor (NP), a digital signal processing circuit (DSP), or a microcontroller (microcontroller).
  • CPU central processing unit
  • NP network processor
  • DSP digital signal processing circuit
  • microcontroller microcontroller
  • controller unit MCU
  • MCU memory
  • PLD programmable logic device
  • a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor.
  • the software modules may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art.
  • the storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.
  • a memory in this application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically programmable Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • Volatile memory may be random access memory (RAM), which acts as an external cache.
  • RAM random access memory
  • SRAM static random access memory
  • DRAM dynamic random access memory
  • SDRAM synchronous DRAM
  • SDRAM double data rate synchronous dynamic random access memory
  • double data rate SDRAM double data rate SDRAM
  • DDR SDRAM enhanced synchronous dynamic random access memory
  • ESDRAM enhanced synchronous dynamic random access memory
  • SCRAM synchronous link dynamic random access memory
  • direct rambus RAM direct rambus RAM
  • the present application also provides a computer program product, the computer program product includes: computer program code, when the computer program code is run on a computer, the computer executes the execution of the aforementioned terminal device. method.
  • the present application also provides a computer program product, the computer program product includes: computer program code, when the computer program code is run on a computer, the computer is made to execute the above-mentioned network device. method.
  • the present application further provides a computer-readable medium, where program codes are stored in the computer-readable medium, and when the program codes are run on a computer, the computer is made to execute the execution of the aforementioned terminal device. method.
  • the present application further provides a computer-readable medium, where the computer-readable medium stores program codes, when the program codes are executed on a computer, the computer is made to execute the execution of the aforementioned network device. method.
  • the present application further provides a system, which includes a network device.
  • the system may also include a terminal device.
  • An embodiment of the present application further provides a processing apparatus, including a processor and an interface, where the processor is configured to execute the method in any of the foregoing method embodiments.
  • the above processing device may be a chip.
  • the processing device may be a field programmable gate array (FPGA), a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC) , off-the-shelf programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, can also be system on chip (system on chip, SoC), can also be central processing It can be a central processor unit (CPU), a network processor (NP), a digital signal processing circuit (DSP), or a microcontroller (MCU) , it can also be a programmable logic device (PLD) or other integrated chips.
  • FPGA field programmable gate array
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • FPGA field programmable gate array
  • FPGA field programmable gate array
  • FPGA field programmable gate array
  • FPGA field programmable gate
  • a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor.
  • the software modules may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art.
  • the storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.
  • the above-mentioned embodiments it may be implemented in whole or in part by software, hardware, firmware or any combination thereof.
  • software it can be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated.
  • the computer may be a general purpose computer, special purpose computer, computer network, or other programmable device.
  • the computer instructions may be stored in or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server or data center Transmission to another website site, computer, server, or data center by wire (eg, coaxial cable, optical fiber, digital subscriber line, DSL) or wireless (eg, 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 includes an integration of one or more available media.
  • the available media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, high-density digital video discs (DVDs)), or semiconductor media (eg, solid state discs, SSD)) etc.
  • a component may be, but is not limited to, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, or a computer.
  • an application running on a computing device and the computing device may be components.
  • One or more components may reside within a process or thread of execution, and a component may be localized on one computer or distributed between 2 or more computers.
  • these components can execute from various computer readable media having various data structures stored thereon.
  • a component may, for example, pass a signal through a local system based on a signal having one or more data packets (such as data from two components interacting with another component between a local system, a distributed system, or a network, such as the Internet interacting with other systems through signals). or remote process to communicate.
  • a signal having one or more data packets (such as data from two components interacting with another component between a local system, a distributed system, or a network, such as the Internet interacting with other systems through signals). or remote process to communicate.
  • B corresponding to A indicates that B is associated with A, and B can be determined according to A.
  • determining B according to A does not mean that B is only determined according to A, and B may also be determined according to A and/or other information.
  • an item includes one or more of the following: A, B, and C
  • the item can be any of the following: A; B, unless otherwise specified. ;C;A and B;A and C;B and C;A,B and C;A and A;A,A and A;A,A and B;A,A and C,A,B and B;A , C and C; B and B, B, B and B, B, B and C, C and C; C, C and C, and other combinations of A, B and C.
  • a total of three elements of A, B and C are used as examples above to illustrate the optional items of the item.
  • the disclosed system, apparatus and method may be implemented in other manners.
  • the apparatus embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • the functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium.
  • the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution.
  • the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: a U disk, a removable hard disk, a read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk and other media that can store program codes.

Abstract

L'invention concerne un procédé et un appareil de transmission d'un signal de référence applicables au domaine des communications sans fil. Le procédé peut consister à : concevoir des séquences de vérification comportant différentes longueurs pour distinguer un port d'origine et un port nouvellement ajouté ; et multiplexer des ports DMRS semi-orthogonaux ou à faible corrélation croisée sans augmenter des ressources de temps-fréquence. L'invention permet d'augmenter la capacité de ports, de minimaliser l'interférence entre le port d'origine et le port nouvellement ajouté dans un protocole et de garantir la qualité d'estimation de canal. Le procédé et l'appareil permettant de transmettre le signal de référence satisfont l'exigence du système relative au nombre de ports lorsque le nombre d'antennes augmente soudainement, et améliorent la flexibilité et l'efficacité de transmission d'informations.
PCT/CN2021/084207 2021-03-30 2021-03-30 Procédé et appareil de transmission d'un signal de référence WO2022205022A1 (fr)

Priority Applications (2)

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CN202180096582.6A CN117121414A (zh) 2021-03-30 2021-03-30 用于传输参考信号的方法和装置
PCT/CN2021/084207 WO2022205022A1 (fr) 2021-03-30 2021-03-30 Procédé et appareil de transmission d'un signal de référence

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PCT/CN2021/084207 WO2022205022A1 (fr) 2021-03-30 2021-03-30 Procédé et appareil de transmission d'un signal de référence

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102869096A (zh) * 2011-07-06 2013-01-09 上海贝尔股份有限公司 一种通信网络中用于传输解调参考信号的方法和装置
CN106160826A (zh) * 2015-04-20 2016-11-23 中国移动通信集团公司 Csi-rs配置及csi反馈方法、装置和相关设备
CN107925991A (zh) * 2015-08-19 2018-04-17 华为技术有限公司 一种参考信号配置方法及设备
CN109076505A (zh) * 2016-03-30 2018-12-21 日本电气株式会社 用于传输和接收参考信号的方法和装置
WO2020227012A1 (fr) * 2019-05-03 2020-11-12 Qualcomm Incorporated Configuration de décalage cyclique pour pucch avec modulation bpsk pi/2

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102869096A (zh) * 2011-07-06 2013-01-09 上海贝尔股份有限公司 一种通信网络中用于传输解调参考信号的方法和装置
CN106160826A (zh) * 2015-04-20 2016-11-23 中国移动通信集团公司 Csi-rs配置及csi反馈方法、装置和相关设备
CN107925991A (zh) * 2015-08-19 2018-04-17 华为技术有限公司 一种参考信号配置方法及设备
CN109076505A (zh) * 2016-03-30 2018-12-21 日本电气株式会社 用于传输和接收参考信号的方法和装置
WO2020227012A1 (fr) * 2019-05-03 2020-11-12 Qualcomm Incorporated Configuration de décalage cyclique pour pucch avec modulation bpsk pi/2

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