WO2018127137A1 - 参考信号的传输方法和装置 - Google Patents

参考信号的传输方法和装置 Download PDF

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Publication number
WO2018127137A1
WO2018127137A1 PCT/CN2018/071613 CN2018071613W WO2018127137A1 WO 2018127137 A1 WO2018127137 A1 WO 2018127137A1 CN 2018071613 W CN2018071613 W CN 2018071613W WO 2018127137 A1 WO2018127137 A1 WO 2018127137A1
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Prior art keywords
reference signal
sequence
frequency domain
zadoff
domain resource
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PCT/CN2018/071613
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English (en)
French (fr)
Inventor
胡远洲
丁梦颖
董朋朋
王宗杰
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华为技术有限公司
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Priority claimed from CN201710067326.XA external-priority patent/CN108289021B/zh
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to KR1020197021837A priority Critical patent/KR20190098237A/ko
Priority to EP18736550.7A priority patent/EP3554165B1/en
Publication of WO2018127137A1 publication Critical patent/WO2018127137A1/zh
Priority to US16/505,298 priority patent/US11018830B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/0007—Code type
    • H04J13/0055—ZCZ [zero correlation zone]
    • H04J13/0059—CAZAC [constant-amplitude and zero auto-correlation]
    • H04J13/0062—Zadoff-Chu
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/10—Code generation
    • H04J13/14—Generation of codes with a zero correlation zone
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • Embodiments of the present invention relate to the field of communications, and in particular, to a method and an apparatus for transmitting a reference signal in a wireless communication system.
  • a Reference Signal also known as a pilot signal
  • the receiving device can obtain channel-related information according to the received reference signal to complete channel estimation or channel measurement.
  • the channel measurement result can be used for resource scheduling and link adaptation, and the channel estimation result can be used by the receiving device to demodulate the data.
  • different reference signals need to be orthogonal in order to accurately obtain channel related information.
  • a plurality of reference signals orthogonal to each other can be generally provided by means of time division, frequency division or code division.
  • an uplink reference signal includes an uplink demodulation reference signal (DMRS) and an uplink sounding reference signal (SRS), and the downlink reference signal includes a cell-specific reference signal.
  • CRS cell specific reference signal
  • CRS channel state information reference signal
  • MMSFN multimedia broadcast multicast service single frequency network reference signal
  • PRS positioning reference signal
  • the reference signal especially the upstream reference signal, has a low peak-to-average power ratio (PAPR) and a low raw cubic metric (RCM), which is avoided after passing through a power amplifier (PA).
  • PA peak-to-average power ratio
  • RCM raw cubic metric
  • the reference signal is more severely altered than the data distortion to reduce the demodulation performance. Therefore, the uplink reference signal sequence in the LTE system employs a Zadoff-Chu (ZC) sequence to make the uplink reference signal have a low PAPR/RCM characteristic.
  • ZC Zadoff-Chu
  • the uplink and downlink subframe configurations of the neighboring cells may be different.
  • the current subframe is configured as an uplink subframe
  • the current subframe may be configured as a downlink subframe.
  • the cell edge user equipment U1 in the cell C1 transmitting the uplink data may cause serious interference to the downlink reception of the cell edge user equipment U2 in the cell C2.
  • the user equipment U2 can blindly check the reference signal of U1, and then perform interference cancellation on the reference signal of U1. If the maximum possible allocation bandwidth is 110 resource blocks (RBs) and there are 35 different bandwidth allocation modes, blind detection is required many times to determine the interference reference signal, and the blind detection overhead is large.
  • the present application provides a method, a transmission method and a device for generating a reference signal, so that the PAPR/RCM of the reference signal can meet the performance requirement, and the number of blind detections of the reference signal can be reduced, and the system performance can be improved.
  • a method for generating a frequency domain reference signal including: determining a reference signal sequence according to a length of a ZC sequence and a reference signal sequence, where a length value of the ZC sequence is greater than a maximum of the maximum assignable frequency domain resources The number of time-frequency resource units; mapping the reference signal sequence to the frequency domain resource group to generate a frequency domain reference signal.
  • the reference signal generated by the method has low PAPR/RCM characteristics, and the ZC sequence that needs to be tried when the reference signal is blindly checked has nothing to do with the resource allocation size of the reference signal, which can reduce the number of blind detections, thereby reducing the blind detection overhead.
  • the generation of the reference signal can be carried out in a module of the transmitting device or in a module of the receiving device.
  • the reference signal sequence is further determined according to a location of the frequency domain resource group in a maximum assignable frequency domain resource. According to the reference signal sequence generated by the implementation, a sequence corresponding to the position of the frequency domain resource group is completely intercepted from the ZC sequence, so that when the reference signal is blindly detected, it is not necessary to try various possible frequency domain resource groups.
  • the location can further reduce the number of blind checks, thereby reducing the blind detection overhead and improving system performance.
  • the reference signal sequence is further determined according to an interval of two adjacent minimum time-frequency resource units in the frequency domain resource group.
  • the reference signal generation method is also applicable to a scene in which the minimum video resource unit in the frequency domain resource group is a comb-like distribution.
  • the Zadoff-Chu sequence is X q (m), and X q (m) is according to Determined; wherein, j is an imaginary unit, m is the number of Zadoff-Chu sequence element, m is an integer and 0 ⁇ m ⁇ N zc -1, N zc to the length value of the Zadoff-Chu sequence, q is the The value of the root of the ZC sequence, q and N zc are relatively prime.
  • the Zadoff-Chu sequence length N zc is 21157
  • the root q of the Zadoff-Chu sequence takes one of the following values: 1149, 1203, 1215, 1345 , 1827,1873,1962,2040,2276,2927,2931,3196,3201,3223,3406,3787,5596,6247,6276,6426,7736,7749,7768,8693,8767,8779,8970,9216,9983 ,9996,11161,11174,11941,12187,12378,12390,12464,13389,13408,13421,14731,14881,14910,15561,17370,17751,17934,17956,17961,18226,18230,18881,19117,19195 , 19284, 19330, 19812, 19942, 19954, 20008.
  • the Zadoff-Chu sequence length N zc is 131969
  • the root q of the Zadoff-Chu sequence takes one of the following values: 2908, 5919, 8108, 9176 , 11359,12842,13721,18287,19123,21435,22441,25895,27039,30666,36263,38169,40822,42738,44949,51705,54664,59740,61399,67366,68376,70570,78403,82997,86400 95108, wherein the bandwidth of the frequency domain resource group is greater than or equal to 3 RBs. .
  • the Zadoff-Chu sequence length N zc is 479971
  • the root q of the Zadoff-Chu sequence takes one of the following values: 24335, 35852, 49443, 65019 , 76272,88558,102028,126841,139505,150710,169872,181751,197023,210577,222328,253191,264402,276530,296245,307534,329261,340466,352513,368238,387393,402362,413569,424829,437224 , 448552.
  • the Zadoff-Chu sequence length N zc is 119993
  • the root q of the Zadoff-Chu sequence takes one of the following values: 2197, 3470, 4396, 6191 ,7683,9025,10362,11745,13755,14512,17680,18691,20638,23545,24419,25507,30658,37305,40689,52894,58095,67099,71288,79123,82688,89335,108248,110302,112310 , 116074.
  • a second aspect provides a method for transmitting a reference signal, including: a transmitting device transforms a reference signal in a frequency domain to a time domain to generate a reference signal in a time domain, where the reference signal in the frequency domain includes mapping to a frequency domain a reference signal sequence on the resource group, the reference signal sequence being determined according to a length of the Zadoff-Chu sequence and the reference signal sequence, the length value of the Zadoff-Chu sequence being greater than a minimum time frequency included in the maximum assignable frequency domain resource The number of resource units; the transmitting device transmits a reference signal of the time domain.
  • the transmitting device generates the reference signal of the frequency domain by using the method in the first aspect or any possible implementation manner of the first aspect.
  • a third aspect provides a method for transmitting a reference signal, including: receiving, by a receiving device, a reference signal in the time domain; and the receiving device transforming a reference signal in a time domain to a frequency domain to generate a reference signal in a frequency domain, where
  • the frequency domain reference signal includes a reference signal sequence mapped to a frequency domain resource group, the reference signal sequence being determined according to a length of a Zadoff-Chu sequence and the reference signal sequence, and a length value of the Zadoff-Chu sequence Greater than the maximum number of time-frequency resource units included in the maximum allocatable frequency domain resource.
  • the receiving device generates the reference signal of the frequency domain by using the method in the first aspect or any possible implementation of the first aspect.
  • an apparatus comprising means for performing the method of the first aspect or any of the possible implementations of the first aspect.
  • a communication apparatus comprising a processing unit, a transmitting unit, to perform the method in any of the possible implementations of the second aspect or the second aspect.
  • a communication apparatus comprising a processor, a memory and a transceiver to perform the method of any of the possible implementations of the second aspect or the second aspect.
  • a communication apparatus comprising a processing unit, a transmitting unit, to perform the method in any of the possible implementations of the third aspect or the third aspect.
  • a communication apparatus comprising a processor, a memory and a transceiver to perform the method of any of the third or third possible implementations.
  • a computer readable storage medium is provided, the instructions being stored in the computer readable storage medium, when executed on a computer, causing the computer to perform the first aspect or any possible implementation of the first aspect The method in the way.
  • a computer readable storage medium is provided, the instructions being stored in the computer readable storage medium, when executed on a computer, causing the computer to perform any of the possible implementations of the second aspect or the second aspect The method in the way.
  • a computer readable storage medium is provided, the instructions being stored in the computer readable storage medium, when executed on a computer, causing the computer to perform any of the third or third aspects The method in the implementation.
  • a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of the first aspect or any of the possible implementations of the first aspect.
  • a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of any of the second aspect or the second aspect.
  • a fourteenth aspect there is provided a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of any of the third or third aspects of the possible implementation.
  • FIG. 1 is a schematic structural diagram of a communication system to which an embodiment of the present application is applied;
  • FIG. 2 is a schematic diagram of a method for generating a reference signal according to an embodiment of the present application
  • FIG. 3 is a schematic diagram of generating a reference signal sequence by cyclic extension or truncation of a ZC sequence according to an embodiment of the present application
  • FIG. 4 is a schematic diagram of a method for generating a reference signal sequence according to an embodiment of the present application.
  • FIG. 5 is a schematic diagram of another method for generating a reference signal sequence according to an embodiment of the present application.
  • FIG. 5A is a schematic diagram of still another method for generating a reference signal sequence according to an embodiment of the present application.
  • FIG. 6 is a schematic diagram of a reference signal transmission method according to an embodiment of the present application.
  • FIG. 7 is a schematic diagram of another reference signal transmission method according to an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of a communication apparatus according to an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of another communication apparatus according to an embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of another communication apparatus according to an embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of another communication apparatus according to an embodiment of the present application.
  • the transmitting device and the receiving device in the embodiments of the present application may be any one of the transmitting end device and the receiving end device that performs data transmission in a wireless manner.
  • the transmitting device and the receiving device may be any device having a wireless transceiving function, including but not limited to: a base station NodeB, an evolved base station eNodeB, a base station in a fifth generation (5G) communication system, and a future communication system.
  • the UE may also be referred to as a terminal terminal, a mobile station (MS), a mobile terminal (MT), or the like.
  • the UE may communicate with one or more core networks via a radio access network (RAN), or may access the distributed network in an ad hoc or unlicensed manner, and the UE may also access the wireless network through other means.
  • RAN radio access network
  • the UE can also directly perform wireless communication with other UEs, which is not limited by the embodiment of the present application.
  • the transmitting device and the receiving device in the embodiments of the present application may be deployed on land, including indoors or outdoors, handheld or on-board; or may be deployed on the water; or may be deployed on aircraft, balloons, and satellites in the air.
  • the UE in the embodiment of the present application may be a mobile phone, a tablet, a computer with a wireless transceiver function, a virtual reality (VR) terminal device, and an augmented reality (AR) terminal device.
  • wireless terminals in industrial control wireless terminals in self driving, wireless terminals in remote medical, wireless terminals in smart grid, transportation security (transportation) Wireless terminal in safety), wireless terminal in smart city, wireless terminal in smart home, and the like.
  • the embodiment of the present application does not limit the application scenario.
  • FIG. 1 is a schematic structural diagram of a communication system to which an embodiment of the present application is applied.
  • the communication system includes a core network device 110, a base station 120, a UE 130, and a UE 140 connected by a wireless connection or a wired connection or other means, and the UE 130 and the UE 140 may be stationary or mobile.
  • 1 is only a schematic diagram, and other communication devices and/or other terminal devices may also be included in the communication system, which are not shown in FIG.
  • the embodiments of the present application can be applied to downlink data transmission, and can also be applied to uplink data transmission, and can also be applied to device to device (D2D) data transmission.
  • D2D device to device
  • the transmitting device is a base station, and the corresponding receiving device is a UE.
  • the transmitting device is a UE, and the corresponding receiving device is a base station.
  • the transmitting device is a UE, and the corresponding receiving device is also a UE.
  • the embodiment of the present application does not limit this.
  • resource multiplexing between user equipments has two modes. One is that the time-frequency resources between the UEs do not overlap at all, and the resources are reused by means of time division or frequency division; The other is that the time-frequency resources between the UEs completely overlap, and the resources are multiplexed by means of space division.
  • reference signals of different UEs are also orthogonalized by time division or frequency division; when resources between UEs are multiplexed by means of space division
  • the reference signals of different UEs may be orthogonal to each other by orthogonal cover code (OCC) in time division, frequency division, time domain or frequency domain, or may be mutually positive through different linear phase rotations of the same sequence. cross.
  • OCC orthogonal cover code
  • new fifth-generation air interface 5 th generation, 5G
  • new radio, NR new radio, NR
  • new radio, NR new radio, NR
  • the scheme of the block reference signal divides the reference signal of each UE into a plurality of blocks, and the reference signals of different UEs are orthogonalized within the block to ensure that the reference signals of different UEs are orthogonal to each other.
  • the time-frequency resources of the two UEs can be shared by the block size, and the time-frequency resources of the two UEs that do not require space division multiplexing are completely overlapped, so that the resource allocation between the UEs is achieved. More flexible.
  • the uplink and downlink subframe configurations of the neighboring cells may be different.
  • the current subframe of the cell C1 is configured as an uplink subframe
  • the neighboring cell C2 of the cell C1 the current subframe configuration is configured. It is a downlink subframe.
  • the geographical locations of the two UEs of U1 and U2 are adjacent, but the serving cell of U1 is C1, and the serving cell of U2 is C2.
  • U2 can perform interference suppression or interference cancellation on the interference signal from U1.
  • U2 can measure and estimate the reference signal from U1.
  • n 2 x1 ⁇ 3 x2 ⁇ 5 x3 , where x1, x2, and x3 are integers greater than or equal to zero.
  • the reference signal sequences corresponding to different resource allocation sizes are cyclic extensions of ZC sequences of different lengths, and the relevant cyclic extensions are described in detail in FIG. 3 below.
  • the reference signal sequence is only related to the size of the resource allocation, regardless of the location of the resource allocation.
  • the frequency domain resource occupied by the reference signal of U2 may partially overlap or completely overlap with the frequency domain resource occupied by the reference signal of U1, because U2 does not know the starting position of the reference signal of U1 and the reference signal sequence used. Therefore, U2 needs blind detection to traverse various possible resource allocation sizes and resource allocation locations, and the overhead of blind detection is very large.
  • an embodiment of the present application provides a method, a transmission method, and a device for generating a reference signal.
  • the reference signal sequences provided by the embodiments of the present application are all intercepted from a fixed length ZC sequence, and the ZC sequence is independent of the resource allocation size, so that U2 does not need to try various possible when blindly checking the reference signal of U1.
  • the resource allocation size corresponds to the ZC sequence, thereby reducing the blind detection overhead.
  • the reference signal sequence provided by the embodiment of the present application is intercepted from the ZC sequence, it completely corresponds to the resource allocation position, so that U2 does not need to try various possible resource allocation positions of U1 when blindly checking the reference signal of U1. , which can further reduce the blind inspection overhead and improve system performance.
  • FIG. 2 is a method for generating a frequency domain reference signal based on a ZC sequence according to an embodiment of the present application.
  • S210 Determine a reference signal sequence according to a length of the ZC sequence and the reference signal sequence, where the length of the ZC sequence is greater than a maximum number of time-frequency resource units included in the maximum assignable frequency domain resource.
  • the maximum assignable frequency domain resource is the largest frequency domain resource that can be allocated to one wireless link, and the minimum time-frequency resource unit may have different definitions in different systems, for example, in the LTE system, the minimum time-frequency A resource element is called a resource element (RE) and is a subcarrier resource within a time domain symbol.
  • the maximum frequency domain resource that can be allocated to a radio link is 100 resource blocks (RBs), and the number of minimum time-frequency resource units included is 1200.
  • the maximum allocateable frequency domain resource contains the minimum number of time-frequency resource units of 1200.
  • the reference signal sequence is a sequence that is truncated from the ZC sequence and has a length equal to the length of the reference signal sequence.
  • the length of the reference signal sequence is equal to the number of minimum time-frequency resource units included in the frequency domain resource group carrying the reference signal sequence, that is, the bandwidth of the frequency domain resource group corresponds to the length of the reference signal sequence.
  • the frequency domain resource group carrying the reference signal sequence may also be referred to as the frequency domain resource of the reference signal. It can be understood that the size of the frequency domain resource group may be the same as the maximum assignable frequency domain resource, or may be smaller than the maximum assignable frequency domain resource.
  • the size of the frequency domain resource group herein refers to the number of minimum time-frequency resource units included in the frequency domain resource group.
  • the frequency domain resource group may have different frequency offsets when the size is the same. As shown in FIG. 4, the bandwidth of the frequency domain resources of the reference signal 2 and the reference signal 3 are all 8 RBs, but the reference signal 3 The frequency domain resource is offset by 12 RBs relative to the frequency domain resource of reference signal 2.
  • the reference signal sequence on any one of the maximum assignable frequency domain resources can be obtained by the foregoing method, and the obtained reference signal sequence is mapped to the corresponding frequency domain resource group to generate a frequency domain reference signal.
  • the ZC sequence X q (m) can be expressed by the formula (1):
  • m is the sequence number of the ZC sequence element
  • m is an integer and 0 ⁇ m ⁇ N zc -1
  • j is an imaginary unit
  • q is the root of the ZC sequence
  • N zc is the length of the ZC sequence
  • q and N Zc is relatively prime. It can be understood that, in the present application, the number of the array or the sequence, for example, the value of the above m, may have different numbering manners, and may be counted from zero at the beginning, and the embodiment of the present application does not do this. limited.
  • the ZC sequence may also be referred to as a length N zc q-th root ZC sequence (the q th root ZC sequence) .
  • the ZC sequence has a good autocorrelation, ie the sequence has a large autocorrelation peak. There is good cross-correlation between two ZC sequences of the same length but different roots, ie the value of the cross-correlation is small.
  • the length of the ZC sequence is a prime number, but in the embodiment of the present application, N zc may also be a non-primary number.
  • the ZC sequence defined by the formula (1) is essentially a set of ZC sequences of length N zc , and the sequence set may contain different ZC sequences under the value of q.
  • a base sequence of the reference signal sequence can be generated from the ZC sequence X q (m) As shown in formula (2):
  • Equation (2) can be understood as a cyclic sequence of a ZC sequence of length N zc to obtain a base sequence of length N;
  • equation (2) can be understood as a base sequence of length N by truncating a ZC sequence of length N zc .
  • Equation (2) can be simplified as:
  • Equation (2) and Equation (3) take the ZC sequence of length N zc from the start position of the sequence to obtain a reference signal sequence of length N, that is, the end portion of the ZC sequence beyond the N length is truncated.
  • This application of the starting position and the truncated data truncation is not limited, for example, may be removed from the start of the sequence of data elements n 0 data obtained reference signal sequence length of N.
  • the base sequence can be Different frequency domain linear phase rotations are performed in the frequency domain.
  • the different reference signal sequences obtained after different linear phase rotations of the same base sequence are completely orthogonal, so that there is no interference between the reference signal sequences obtained by linear phase rotation.
  • Base sequence After the linear phase rotation the reference signal sequence is obtained. As shown in formula (4):
  • ⁇ is the phase of the linear phase rotation
  • the ZC sequence X q (m) can be determined by the value of the length N zc of the ZC sequence and the value of the root q of the ZC sequence, correspondingly, the base sequence of the reference signal sequence generated by the ZC sequence X q (m)
  • the reference signal sequence generated by the ZC sequence X q (m) can be determined by the value of the length N zc of the ZC sequence and the value of the root q of the ZC sequence. It can be determined by the value of the length N zc of the ZC sequence, the value of the root q of the ZC sequence, and the phase ⁇ of the linear phase rotation.
  • a possible implementation is to determine the root of the ZC sequence used by the cell according to the cell identifier, and then intercept a sequence whose length is the length of the reference signal sequence from the ZC sequence as a reference signal sequence.
  • the ZC sequence that needs to be tried when blindly detecting the reference signal thus generated is independent of the resource allocation size of the reference signal, can reduce the number of blind detections, thereby reducing the blind detection overhead.
  • the frequency domain resource of the reference signal 0 is allocated from a resource element (RE) numbered 0, and the frequency domain resource size of the reference signal 0 is a reference signal sequence carrying the reference signal 0.
  • the size of the frequency domain resource group is 20 RBs, that is, 240 REs. Therefore, a sequence of length 240 is taken as the reference signal sequence of the reference signal 0 from the position 0 of the ZC sequence.
  • the frequency domain resource size of the reference signal 1 is 12 RBs, and a sequence of length 144 is taken as the reference signal sequence of the reference signal 1 from the 96th position of the ZC sequence; the frequency domain resource sizes of the reference signal 2 and the reference signal 3 are both For 8 RBs, a sequence of length 96 is intercepted from the position 0 of the ZC sequence as the reference signal sequence of reference signal 2, and a sequence of length 96 is intercepted from the position 144 of the ZC sequence as a reference for reference signal 3. Signal sequence.
  • the reference signal sequence generated by the reference signal generating method provided by the embodiment of the present application intercepts a sequence corresponding to the position of the frequency domain resource group from the ZC sequence, so that when the reference signal is blindly detected, Trying the location of various possible frequency domain resource groups can further reduce the number of blind checks, thereby reducing the blind detection overhead and improving system performance.
  • the reference signal sequence is determined according to the position of the starting position of the frequency domain resource group in the maximum assignable frequency domain resource. It can be understood that the reference signal sequence may also be based on the termination position of the frequency domain resource group. The location in the maximum assignable frequency domain resource is determined, but the embodiment of the present application does not limit this.
  • the reference signal sequence R q (n) can be expressed by formula (7):
  • equation (8) the method of generating the reference signal sequence R q (n) from the ZC sequence X q (m) can be as shown in equation (8):
  • equation (9) the method of generating the reference signal sequence R q (n) from the ZC sequence X q (m) can be as shown in equation (9):
  • an LTE system with a system bandwidth of 20 MHz is used.
  • the maximum allocateable frequency domain resource is 100 RBs.
  • the reference signal bandwidth it is possible to allocate all possible bandwidths between 1 RB and 100 RBs.
  • RCM ⁇ 5.3 the maximum cross-correlation is less than 0.73, and the number of roots of the ZC sequence is required to be 30.
  • the value of the root q of the ZC sequence satisfying these constraints is shown in Table 1.
  • the length of the ZC sequence in the table is N.
  • Zc is 479971
  • q idx is the number of q.
  • the maximum cross-correlation of a set of sequences of the same length refers to the maximum amplitude value in the cross-correlation result obtained by performing cross-correlation operation on any two sequences in the set of sequences.
  • the ZC sequence is generated according to the value of q in Table 1, and the reference signal generated according to the method for generating the reference signal described above has the characteristics of low PAPR/RCM, and can greatly reduce the blind detection overhead of the reference signal and improve system performance. .
  • the reference signal uses a quadrature phase shift keying (QPSK) sequence obtained by computer search.
  • QPSK quadrature phase shift keying
  • 3 RB and above use ZC sequence.
  • the QPSK sequence in the existing LTE system is still used when the reference signal bandwidth is 1 RB and 2 RBs.
  • the reference signal sequence is generated, and when the reference signal bandwidth is all possible allocated bandwidths between 3 RBs and 100 RBs, the reference signal sequence generation method is used to generate the reference signal sequence.
  • the reference signal bandwidth is also the bandwidth of the frequency domain resource group.
  • RCM bandwidth
  • the maximum cross-correlation is less than 0.445, and the number of roots of the ZC sequence is required to be 30.
  • the value of the root q of the ZC sequence satisfying these constraints is shown in Table 2.
  • the length of the ZC sequence in the table is N.
  • the zc is 119993.
  • the reference signal generated from the root sequence of the ZC sequence shown in Table 2 has a lower number of blind detections than the reference signal generated based on the root sequence of the ZC sequence shown in Table 1, but the PAPR/RCM is lower.
  • the possible bandwidth allocation of the frequency domain resource group is segmented, and the reference signal sequence is generated by using different sequence groups respectively.
  • the bandwidth of the frequency domain resource group is 1 RB and the 2 RBs are the first group, and the reference signal sequence is generated by using the QPSK sequence in the current LTE system; the bandwidth of the frequency domain resource group is 3 RBs to 30 RBs.
  • the reference signal sequence is generated by using the root sequence of a set of ZC sequences as shown in Table 3; the bandwidth of the frequency domain resource group is 31 RBs to 100 RBs, and the third group is set as shown in Table 4.
  • the root sequence of the ZC sequence generates a reference signal sequence.
  • the reference signal generated according to the root sequence of the ZC sequence shown in Tables 3 and 4 has a lower PAPR/RCM than the reference signal generated according to the root sequence of the ZC sequence shown in Table 1, although the number of blind detections is increased. .
  • the frequency domain resource group is all possible allocated bandwidth between 3 RBs and 30 RBs, with RCM ⁇ 4.9, the maximum cross-correlation is less than 0.39, and the number of roots of the ZC sequence is required to be 30, and the constraints are met.
  • the value of the root q of the ZC sequence is shown in Table 3.
  • the length of the ZC sequence in the table, N zc is 119,993.
  • the frequency domain resource group has all possible allocated bandwidths between 31 RBs and 100 RBs, with RCM ⁇ 4.9, the maximum cross-correlation is less than 0.16, and the number of roots of the ZC sequence is required to be 30, and the constraints are met.
  • the value of the root q of the ZC sequence is shown in Table 4, and the length N zc of the ZC sequence in the table is 119,993.
  • OOB out of band
  • WOLA filtering and windowed overlap and add
  • the maximum assignable frequency domain resource is 108 RBs with a total of 1296 subcarriers
  • the frequency domain resource group can allocate all possible bandwidths between 3 RBs and 108 RBs; with RCM ⁇ 5.1, the maximum cross correlation is less than 0.44, the number of roots requiring a ZC sequence of 30 is a constraint, and the value of the root q of the ZC sequence satisfying these constraints is as shown in Table 5, and the length N zc of the ZC sequence in the table is 131969.
  • the maximum assignable frequency domain resource is 108 RBs with a total of 1296 subcarriers
  • the frequency domain resource group can allocate all possible bandwidths between 3 RBs and 108 RBs; with RCM ⁇ 5.2, the maximum cross correlation is less than 0.5, the number of roots requiring a ZC sequence of 60 is a constraint, and the value of the root q of the ZC sequence satisfying these constraints is as shown in Table 6, and the length N zc of the ZC sequence in the table is 131969.
  • the cross-correlation may not be a constraint, with a PAPR/RCM/cubic metric (CM) as a constraint.
  • CM PAPR/RCM/cubic metric
  • an LTE system with a system bandwidth of 20 MHz is used.
  • the maximum allocateable frequency domain resource is 100 RBs.
  • RCM ⁇ 5.3 the cross-correlation does not set the threshold, and the number of roots of the ZC sequence is required to be 60.
  • the value of the root q of the ZC sequence satisfying these constraints is shown in Table 6A.
  • the length of the ZC sequence in the table is N.
  • Zc is 21157
  • q idx is the number of q.
  • an LTE system with a system bandwidth of 20 MHz is used.
  • the maximum allocateable frequency domain resource is 110 RBs.
  • the cross-correlation does not set the threshold, and the number of roots of the ZC sequence is required to be 60.
  • the value of the root q of the ZC sequence satisfying these constraints is shown in Table 6B.
  • the length of the ZC sequence in the table is N.
  • zc to 22109, q idx is a schematic number q.
  • an LTE system with a system bandwidth of 20 MHz is used.
  • the maximum allocateable frequency domain resource is 100 RBs.
  • the RB generates a reference signal sequence using the QPSK sequence in the current LTE system.
  • RCM ⁇ 5.3 the cross-correlation does not set the threshold, and the number of roots of the ZC sequence is required to be 60.
  • the value of the root q of the ZC sequence satisfying these constraints is shown in Table 6C.
  • the length of the ZC sequence in the table is N.
  • Zc is 8431, and q idx is the number of q.
  • an LTE system with a system bandwidth of 20 MHz is used.
  • the maximum allocateable frequency domain resource is 110 RBs.
  • the RB generates a reference signal sequence using the QPSK sequence in the current LTE system.
  • RCM ⁇ 5.3 the cross-correlation does not set the threshold, and the number of roots of the ZC sequence is required to be 60.
  • the value of the root q of the ZC sequence satisfying these constraints is shown in Table 6D, and the length of the ZC sequence in the table is N.
  • Zc is 9871
  • q idx is the number of q.
  • the q idx in Tables 1 to 6D above is only a number indicating the value of q, and does not limit the order of the values of q.
  • q idx has other numbering forms. For example, it can be numbered from 0 or The other sequences are numbered.
  • the above Tables 1 to 6D may also have no q idx , and only the set of values of the corresponding q may be given.
  • the embodiment of the application itself also provides another method for intercepting the reference signal sequence from the ZC sequence: when the reference signal sequence intercepts the reference signal sequence from the ZC sequence, the frequency domain resource group carrying the reference signal sequence is not considered to be maximum assignable.
  • the location in the frequency domain resource For example, regardless of the location of the frequency domain resource group in the maximum assignable frequency domain resource, a sequence having a length of the reference signal sequence length is taken as a reference signal sequence from the beginning of the ZC sequence.
  • the minimum time-frequency resource unit included in the frequency domain resource group is a comb-like distribution.
  • the minimum time-frequency resource unit in the frequency domain resource group of the reference signal 0 is comb-shaped, and the adjacent minimum time-frequency resource units are equally spaced, and the interval is N. Space minimum time-frequency resource unit.
  • the minimum time-frequency resource unit in the frequency domain resource group of the reference signal 1 is also discretely mapped, and the size of the frequency domain resource group of the reference signal 0 and the reference signal 1 may be the same or different.
  • the reference signal sequence of length N is discretely mapped to the frequency domain resource group to generate a frequency domain reference signal, wherein the reference signal sequence is adjacent to the frequency domain resource group according to the location in the maximum assignable frequency domain resource and the frequency domain resource group.
  • the interval between the two minimum time-frequency resource units is determined.
  • the sequence rotated by the linear phase The reference signal sequence R q (n) can be expressed by equation (10):
  • equation (11) the method of generating a reference signal sequence R q (n) mapped to a discrete frequency domain resource group from the ZC sequence X q (m) can be as shown in equation (11):
  • equation (12) the method of generating the reference signal sequence R q (n) mapped to the discrete frequency domain resource group from the ZC sequence X q (m) can be as shown in equation (12):
  • the reference signal sequence of length N is discretely mapped to the frequency domain resource group to generate a frequency domain reference signal, wherein the reference signal sequence is determined according to a position of the frequency domain resource group in the maximum assignable frequency domain resource, and the frequency is determined.
  • the interval between two adjacent minimum time-frequency resource units in the domain resource group is independent. As shown in FIG. 5A, the minimum time-frequency resource units in the frequency domain resource group corresponding to the reference signal 0 are comb-like, and the adjacent minimum time-frequency resource units are equally spaced, and the interval is N space minimum. Frequency resource unit.
  • the minimum time-frequency resource unit in the frequency domain resource group of the reference signal 1 is also comb-shaped, and the size of the frequency domain resource group of the reference signal 0 and the reference signal 1 may be the same or different.
  • the reference signal sequence of length N is obtained by continuously intercepting the length N data of the ZC sequence, and the intercepted data is only related to the length of the reference signal sequence, for example, starting from the head of the ZC sequence, or from a predefined bias.
  • the shifting position begins to be intercepted, which is not limited by the embodiment of the present application. The following is taken as an example starting from the head of the ZC sequence, specifically, the sequence rotated by the linear phase.
  • the reference signal sequence R q (n) can be expressed by equation (13):
  • equation (14) the method of generating the reference signal sequence R q (n) mapped to the discrete frequency domain resource group from the ZC sequence X q (m) can be as shown in equation (14):
  • the reference signal sequence of length N is mapped to the frequency domain resource group to generate the frequency domain reference signal, and the reference signal sequence is determined by the ZC sequence in the ZC sequence set, and the length of the ZC sequence in the ZC sequence set is greater than the maximum assignable
  • the frequency domain resource includes a minimum number of time-frequency resource units, and the ZC sequence set includes at least two different length ZC sequences.
  • an LTE system with a system bandwidth of 20 MHz is used.
  • the maximum allocateable frequency domain resource is 100 RBs.
  • the reference signal bandwidth it can be all possible allocated bandwidths between 3 RBs and 100 RBs, with RCM ⁇ 5.4, the maximum. cross-correlation is less than 0.4, the number of root ZC sequences required for the constraint 30, the length N k q satisfy root ZC sequence and ZC sequences of these constraints have the values shown in table 7.
  • the sequence number in the above table 7 is only a number indication of the combination of values of N zc and q, and does not limit the order of the combination of values of N zc and q.
  • the sequence number has other number forms, for example, it can be from 0. Start numbering, or you can number them in other order.
  • the above Table 7 may also have no sequence number.
  • an embodiment of the present application further provides a method for transmitting a reference signal.
  • the transmitting device transforms a reference signal in a frequency domain to a time domain to generate a reference signal in a time domain, where the reference signal in the frequency domain includes a reference signal sequence mapped to a frequency domain resource group, where the reference signal sequence is according to The length of the ZC sequence and the reference signal sequence is determined, and the length value of the ZC sequence is greater than the number of minimum time-frequency resource units included in the maximum assignable frequency domain resource. It can be understood that the length of the reference signal sequence is less than or equal to the maximum number of time-frequency resource units included in the maximum allocatable frequency domain resource, that is, the bandwidth of the frequency domain resource group is less than or equal to the maximum assignable frequency domain resource. .
  • the reference signal sequence is further determined according to a location of the frequency domain resource group in a maximum allocatable frequency domain resource.
  • the reference signal sequence is further determined according to an interval of two adjacent minimum time-frequency resource units in the frequency domain resource group.
  • the method for generating the reference signal in the frequency domain may refer to the method shown in FIG. 2.
  • the commonly used frequency domain to time domain transform methods are inverse discrete Fourier transform (IDFT) and inverse fast Fourier transform (IFFT), but the embodiments of the present application do not do this. limited.
  • IDFT inverse discrete Fourier transform
  • IFFT inverse fast Fourier transform
  • the sending device sends the reference signal of the time domain.
  • the transmitting device can also perform digital-to-analog conversion (converting the digital signal into an analog signal) and carrier modulation (modulating the baseband signal onto the radio frequency carrier) before transmitting the reference signal in the time domain, and then pass through The antenna transmits the signal.
  • an embodiment of the present application provides another method for transmitting a reference signal.
  • the receiving device receives the time domain reference signal.
  • the receiving device receives the wireless signal from the wireless channel through the antenna, and the wireless signal includes the reference signal in the time domain.
  • the receiving device transforms a reference signal in a time domain to a reference signal in a frequency domain to generate a frequency domain, where the reference signal in the frequency domain includes a reference signal sequence mapped to a frequency domain resource group, where the reference signal sequence is according to ZC.
  • the sequence and the length of the reference signal sequence are determined, and the length value of the ZC sequence is greater than the number of minimum time-frequency resource units included in the maximum assignable frequency domain resource. It can be understood that the length of the reference signal sequence is less than or equal to the maximum number of time-frequency resource units included in the maximum allocatable frequency domain resource, that is, the bandwidth of the frequency domain resource group is less than or equal to the maximum assignable frequency domain resource.
  • the reference signal sequence is further determined according to a location of the frequency domain resource group in a maximum allocatable frequency domain resource.
  • the reference signal sequence is further determined according to an interval of two adjacent minimum time-frequency resource units in the frequency domain resource group.
  • the receiving device measures the reference signal to obtain an estimate of the wireless channel parameter between the transmitting device and the receiving device, and the channel estimation result may be used to demodulate the data sent by the sending device; or obtain the sending device and the receiving device.
  • the measurement of channel quality between the device and the receiving device can be used to transmit link adaptation and resource allocation of data transmission between the device and the receiving device.
  • the measurement results of the sequence can also be used for positioning measurement, and the application does not limit the use of the reference signal.
  • the sending device may obtain the reference signal sequence from the memory, or may generate the reference signal sequence in real time according to the relevant parameters of the reference signal sequence.
  • the method for the sending device to obtain the related parameters of the reference signal sequence may be obtained from the memory, or the reference signal sequence may be uniformly allocated by the network device, and the relevant parameters of the reference signal sequence are sent to the sending device by using the signaling, and the sending device uses the The reference signal sequence is obtained from the relevant parameters of the reference signal sequence.
  • the relevant parameters of the ZC sequence herein may include at least one of a value indicating a ZC sequence length value, a value of a root of the ZC sequence, and a phase of a linear phase rotation.
  • the network device herein may be a base station NodeB, an evolved base station eNodeB, a base station in a 5G communication system, or other network equipment.
  • the receiving device may refer to a frequency domain reference signal generation process as shown in FIG. 2 to generate a frequency domain reference signal that is the same as the frequency domain reference signal generated by the transmitting device.
  • the method for the receiving device to acquire the reference signal sequence may be to first acquire a related parameter of the reference signal sequence, and then use the parameter to generate a reference signal sequence.
  • the method for the receiving device to obtain the related parameter of the reference signal sequence may be: after the sending device acquires the relevant parameter of the reference signal sequence, the related parameter of the reference signal sequence is sent to the receiving device by using signaling; or the network device may use signaling The relevant parameters of the reference signal sequence are sent to the receiving device.
  • the sending device and the receiving device may also obtain relevant parameters of the reference signal sequence in an implicit manner, for example, implicitly determining related parameters of the reference signal sequence by means of a cell identifier, a slot number, and the like.
  • the reference signal sequence generation method and the reference signal transmission method provided by the embodiments of the present application are introduced from the perspectives of the interaction between the sending device, the receiving device, and the sending device and the receiving device.
  • various devices such as a transmitting device and a receiving device, etc., in order to implement the above functions, include hardware structures and/or software modules corresponding to the respective functions.
  • the present application can be implemented in a combination of hardware or hardware and computer software in combination with the elements and method steps of the various examples described in the embodiments disclosed herein. Whether a function is implemented in hardware or computer software to drive hardware depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present application.
  • the communication device implements the functions of the transmitting device in the embodiment of the reference signal transmission method described above, and thus can also achieve the beneficial effects of the above reference signal transmission method.
  • the communication device may be the UE 130 or the UE 140 or the base station 120 as shown in FIG. 1 , and may also be other transmitting-side devices that use the reference signal for wireless communication.
  • the communication device 800 includes a processing unit 810 and a transmitting unit 820.
  • the processing unit 810 is configured to transform the reference signal in the frequency domain to the time domain to generate a reference signal in the time domain, where the reference signal in the frequency domain includes a reference signal sequence mapped to the frequency domain resource group, where the reference signal
  • the sequence is determined according to a length of the ZC sequence and the reference signal sequence, the length value of the ZC sequence being greater than the number of minimum time-frequency resource units included in the maximum assignable frequency domain resource.
  • the sending unit 820 is configured to send the reference signal of the time domain.
  • communication device 900 includes a processor 910, a transceiver 920, and a memory 930, wherein memory 930 can be used to store code executed by processor 910.
  • the various components in the communication device 900 communicate with one another via internal connection paths, such as by control and/or data signals over the bus.
  • the processor 910 is configured to transform a reference signal in a frequency domain to a time domain to generate a reference signal in a time domain, where the reference signal in the frequency domain includes a reference signal sequence mapped to a frequency domain resource group, where the reference signal
  • the sequence is determined according to a length of the ZC sequence and the reference signal sequence, the length value of the ZC sequence being greater than the number of minimum time-frequency resource units included in the maximum assignable frequency domain resource.
  • the transceiver 920 is configured to send the reference signal of the time domain.
  • FIG. 10 and 11 are schematic diagrams showing the structure of two other possible communication devices according to an embodiment of the present application.
  • the communication device implements the functions of the receiving device in the embodiment of the reference signal transmission method described above, and thus can also achieve the beneficial effects of the above reference signal transmission method.
  • the communication device may be the UE 130 or the UE 140 or the base station 120 as shown in FIG. 1 , and may also be other receiving-side devices that use the reference signal for wireless communication.
  • the communication device 1000 includes a receiving unit 1010 and a processing unit 1020.
  • the receiving unit 1010 is configured to receive a reference signal in a time domain.
  • the processing unit 1020 is configured to transform a reference signal in a time domain to a frequency domain to generate a reference signal in a frequency domain, where the reference signal in the frequency domain includes a reference signal sequence mapped to a frequency domain resource group, where the reference signal
  • the sequence is determined according to a length of the ZC sequence and the reference signal sequence, the length value of the ZC sequence being greater than the number of minimum time-frequency resource units included in the maximum assignable frequency domain resource.
  • the communication device 1100 includes a processor 1120, a transceiver 1110, and a memory 1130, wherein the memory 1130 can be used to store code executed by the processor 1120.
  • the various components in the communication device 1100 communicate with one another via internal connection paths, such as control and/or data signals via a bus.
  • the transceiver 1110 is configured to receive a reference signal in a time domain.
  • the processor 1120 is configured to transform a reference signal in a time domain to a frequency domain to generate a reference signal in a frequency domain, where the reference signal in the frequency domain includes a reference signal sequence mapped to a frequency domain resource group, where the reference signal is The sequence is determined according to a length of the ZC sequence and the reference signal sequence, the length value of the ZC sequence being greater than the number of minimum time-frequency resource units included in the maximum assignable frequency domain resource.
  • Figures 9 and 11 only show one design of the communication device.
  • the communication device can include any number of receivers and processors, and all communication devices that can implement embodiments of the present application are within the scope of the present application.
  • processors in the embodiment of the present application may be a central processing unit (CPU), and may be other general-purpose processors, digital signal processors (DSPs), and application specific integrated circuits. (Application Specific Integrated Circuit, ASIC), Field Programmable Gate Array (FPGA) or other programmable logic device, transistor logic device, hardware component, or any combination thereof.
  • a general purpose processor can be a microprocessor or any conventional processor.
  • the method steps in the embodiments of the present application may be implemented by means of hardware, or may be implemented by a processor executing software instructions.
  • the software instructions can be composed of corresponding software modules, which can be stored in random access memory (RAM), flash memory, read-only memory (ROM), programmable read-only memory (Programmable ROM). , PROM), Erasable PROM (EPROM), Electrically Erasable Programmable Read Only Memory (EEPROM), Register, Hard Disk, Mobile Hard Disk, CD-ROM, or well known in the art Any other form of storage medium.
  • An exemplary storage medium is coupled to the processor to enable the processor to read information from, and write information to, the storage medium.
  • the storage medium can also be an integral part of the processor.
  • the processor and the storage medium can be located in an ASIC. Additionally, the ASIC can be located in a transmitting device or a receiving device. Of course, the processor and the storage medium can also exist as discrete components in the transmitting device or the receiving device.
  • the computer program product includes one or more computer instructions.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in or transmitted by a computer readable storage medium.
  • the computer instructions may be from a website site, computer, server or data center to another website site by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.) Transfer from a computer, server, or data center.
  • the computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media.
  • the usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (such as a solid state disk (SSD)).

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Abstract

本申请提出了一种参考信号的传输方法和设备，该方法包括：发送设备将频域的参考信号变换到时域以生成时域的参考信号，其中，所述频域的参考信号包括映射到频域资源组上的参考信号序列，所述参考信号序列与Zadoff-Chu序列和所述参考信号序列的长度相关，所述Zadoff-Chu序列的长度值大于最大可分配的频域资源包含的最小时频资源单元的个数；所述发送设备发送所述时域的参考信号。本申请的参考信号的传输方法，使得参考信号的PAPR/RCM能满足性能需求，同时可以降低对参考信号的盲检次数，提升系统性能。

Description

参考信号的传输方法和装置
本申请要求于2017年1月9日提交中国专利局、申请号为201710014590.7、发明名称为“参考信号的传输方法和设备”的中国专利申请的优先权，以及要求于2017年2月6日提交中国专利局、申请号为201710067326.X、发明名称为“参考信号的传输方法和设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明实施例涉及通信领域，尤其涉及无线通信系统中的参考信号的传输方法和装置。
背景技术
在无线通信系统中，参考信号(Reference Signal，RS)，又称作导频信号，是由发送设备在预定义的资源上发送给接收设备的一种预定义的信号。接收设备可以根据接收到的参考信号得到信道相关的信息，完成信道估计或信道测量。信道测量结果可以用于资源调度和链路自适应，信道估计结果可以用于接收设备对数据进行解调。一般情况下，为了准确的得到信道相关信息，不同的参考信号需要正交。通常可以采用时分、频分或码分等方式来提供相互正交的多个参考信号。在长期演进(long term evolution，LTE)系统中，上行参考信号包括上行解调参考信号(demodulation reference signal，DMRS)和上行探测参考信号(sounding reference signal,SRS),下行参考信号包括小区特定参考信号(cell specific reference signal，CRS)、下行DMRS、信道状态信息参考信号(channel state information reference signal,CSI-RS)、多媒体广播多播单频网参考信号(multimedia broadcast multicast service single frequency network reference signal,MBSFN RS)以及定位参考信号(positioning reference signal，PRS)。参考信号特别是上行参考信号有低峰均比(peak-to-average power ratio，PAPR)和低原始立方度量(raw cubic metric，RCM)的需求，避免经过功率放大器(power amplifier，PA)后的参考信号比数据畸变更严重从而降低解调性能。因此，LTE系统中的上行参考信号序列了采用扎道夫-朱(Zadoff-Chu，ZC)序列以使得上行参考信号具有低PAPR/RCM的特性。
在动态时分双工(time division duplex，TDD)子帧结构的应用场景中，相邻小区的上下行子帧配置可能不同，例如，在小区C1中，当前子帧配置为上行子帧，而在相邻的小区C2中，当前子帧可能配置为下行子帧。此时，小区C1中的小区边缘用户设备U1发送上行数据会对小区C2中的小区边缘用户设备U2的下行接收产生严重干扰。用 户设备U2可以通过盲检U1的参考信号，进而对U1的参考信号进行干扰消除。如果最大可能的分配带宽为110个资源块(resource block，RB)，有35种不同的带宽分配方式，则需要盲检很多次才能确定干扰的参考信号，盲检开销很大。
发明内容
本申请提供了一种参考信号的生成方法、传输方法和设备，使得参考信号的PAPR/RCM能满足性能需求，同时可以降低对参考信号的盲检次数，提升系统性能。
第一方面，提供了一种频域参考信号的生成方法，包括：根据ZC序列和参考信号序列的长度确定参考信号序列，该ZC序列的长度值大于最大可分配的频域资源所包含的最小时频资源单元的个数；将参考信号序列映射到频域资源组上生成频域参考信号。
通过该方法生成的参考信号具有低PAPR/RCM特性，对该参考信号进行盲检时所需要尝试的ZC序列与参考信号的资源分配大小无关，能够降低盲检次数，从而降低了盲检开销。该参考信号的生成可以在发送设备的模块中实施，也可以在接收设备的模块中实施。
在第一方面的一种可能的实现方式中，所述参考信号序列还根据所述频域资源组在最大可分配的频域资源中的位置确定。根据该实现方式所生成的参考信号序列，是从ZC序列中截取一段与频域资源组的位置完全对应的序列，从而使得在盲检该参考信号时，无需尝试各种可能的频域资源组的位置，可以进一步降低盲检次数，从而降低盲检开销，提升系统性能。
在第一方面的一种可能的实现方式中，所述参考信号序列还根据所述频域资源组中相邻的两个最小时频资源单元的间隔确定。通过该实现方式，使得参考信号生成方法也适用于频域资源组中的最小视频资源单元是梳状分布的场景。
在第一方面的一种可能的实现方式中，所述Zadoff-Chu序列为X q(m)，X q(m)根据
Figure PCTCN2018071613-appb-000001
确定；其中，j为虚数单位，m为所述Zadoff-Chu序列元素的序号，m为整数且0≤m≤N zc-1，N zc为所述Zadoff-Chu序列的长度值，q为所述ZC序列的根的取值，q与N zc互质。
在第一方面的一种可能的实现方式中，所述Zadoff-Chu序列长度N zc为21157，所述Zadoff-Chu序列的根q的取值为以下中的一个：1149,1203,1215,1345,1827,1873,1962,2040,2276,2927,2931,3196,3201,3223,3406,3787,5596,6247,6276,6426,7736,7749,7768,8693,8767,8779,8970,9216,9983,9996,11161,11174,11941,12187,12378, 12390,12464,13389,13408,13421,14731,14881,14910,15561,17370,17751,17934,17956,17961,18226,18230,18881,19117,19195,19284,19330,19812,19942,19954,20008。
在第一方面的一种可能的实现方式中，所述Zadoff-Chu序列长度N zc为131969，所述Zadoff-Chu序列的根q的取值为以下中的一个：2908，5919，8108,9176,11359,12842,13721,18287,19123,21435,22441,25895,27039,30666,36263,38169,40822,42738，44949,51705,54664,59740,61399,67366,68376,70570,78403,82997,86400,95108，其中，所述频域资源组的带宽大于等于3个RB。。
在第一方面的一种可能的实现方式中，所述Zadoff-Chu序列长度N zc为479971，所述Zadoff-Chu序列的根q的取值为以下中的一个：24335,35852,49443，65019，76272，88558，102028，126841，139505，150710，169872，181751，197023，210577，222328，253191，264402，276530，296245，307534，329261，340466，352513，368238，387393，402362，413569，424829，437224，448552。
在第一方面的一种可能的实现方式中，所述Zadoff-Chu序列长度N zc为119993，所述Zadoff-Chu序列的根q的取值为以下中的一个：2197,3470,4396，6191，7683，9025，10362，11745，13755，14512，17680，18691，20638，23545，24419，25507，30658，37305，40689，52894，58095，67099，71288，79123，82688，89335，108248，110302，112310，116074。
第二方面，提供了一种参考信号的传输方法，包括：发送设备将频域的参考信号变换到时域以生成时域的参考信号，其中，所述频域的参考信号包括映射到频域资源组上的参考信号序列，所述参考信号序列根据Zadoff-Chu序列和所述参考信号序列的长度确定，所述Zadoff-Chu序列的长度值大于最大可分配的频域资源包含的最小时频资源单元的个数；所述发送设备发送所述时域的参考信号。
在第二方面的一种可能的实现方式中，发送设备通过第一方面或第一方面的任意可能的实现方式中的方法生成上述频域的参考信号。
第三方面，提供了一种参考信号的传输方法，包括：接收设备接收所述时域的参考信号；所述接收设备将时域的参考信号变换到频域以生成频域的参考信号，其中，所述频域的参考信号包括映射到频域资源组上的参考信号序列，所述参考信号序列根据Zadoff-Chu序列和所述参考信号序列的长度确定，所述Zadoff-Chu序列的长度值大于最大可分配的频域资源包含的最小时频资源单元的个数。
在第三方面的一种可能的实现方式中，接收设备通过第一方面或第一方面的任意可 能的实现方式中的方法生成上述频域的参考信号。
第四方面，提供了一种设备，包括执行第一方面或第一方面的任意可能的实现方式中的方法的模块。
第五方面，提供了一种通信装置，包括处理单元、发送单元，以执行第二方面或第二方面的任意可能的实现方式中的方法。
第六方面，提供了一种通信装置，包括处理器、存储器和收发器，以执行第二方面或第二方面的任意可能的实现方式中的方法。
第七方面，提供了一种通信装置，包括处理单元、发送单元，以执行第三方面或第三方面的任意可能的实现方式中的方法。
第八方面，提供了一种通信装置，包括处理器、存储器和收发器，以执行第三方面或第三方面的任意可能的实现方式中的方法。
第九方面，提了供一种计算机可读存储介质，所述计算机可读存储介质中存储有指令，当其在计算机上运行时，使得计算机执行第一方面或第一方面的任意可能的实现方式中的方法。
第十方面，提了供一种计算机可读存储介质，所述计算机可读存储介质中存储有指令，当其在计算机上运行时，使得计算机执行第二方面或第二方面的任意可能的实现方式中的方法。
第十一方面，提了供一种计算机可读存储介质，所述计算机可读存储介质中存储有指令，当其在计算机上运行时，使得计算机执行第三方面或第三方面的任意可能的实现方式中的方法。
第十二方面，提供了一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行第一方面或第一方面的任意可能的实现方式中的方法。
第十三方面，提供了一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行第二方面或第二方面的任意可能的实现方式中的方法。
第十四方面，提供了一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行第三方面或第三方面的任意可能的实现方式中的方法。
附图说明
图1为本申请的实施例应用的通信系统的架构示意图；
图2为本申请的实施例提供的一种参考信号生成方法示意图；
图3为本申请的实施例提供的一种ZC序列通过循环扩展或截断生成参考信号序列的示意图；
图4为本申请的实施例提供的一种参考信号序列的生成方法的示意图；
图5为本申请的实施例提供的另一种参考信号序列的生成方法的示意图；
图5A为本申请的实施例提供的又一种参考信号序列的生成方法的示意图；
图6为本申请的实施例提供的一种参考信号传输方法示意图；
图7为本申请的实施例提供的另一种参考信号传输方法示意图；
图8为本申请的实施例提供的一种通信装置的结构示意图；
图9为本申请的实施例提供的另一种通信装置的结构示意图；
图10为本申请的实施例提供的另一种通信装置的结构示意图；
图11为本申请的实施例提供的另一种通信装置的结构示意图。
具体实施方式
本申请各实施例中的发送设备和接收设备可以为以无线方式进行数据传输的任意一种发送端的设备和接收端的设备。发送设备和接收设备可以是任意一种具有无线收发功能的设备，包括但不限于：基站NodeB、演进型基站eNodeB、第五代(the fifth generation，5G)通信系统中的基站、未来通信系统中的基站或网络设备、WiFi系统中的接入节点、无线中继节点、无线回传节点以及用户设备(user equipment，UE)。其中，UE也可以称之为终端Terminal、移动台(mobile station，MS)、移动终端(mobile terminal，MT)等。UE可以经无线接入网(radio access network，RAN)与一个或多个核心网进行通信，或者可以通过自组织或免授权的方式接入分布式网络，UE还可以通过其它方式接入无线网络进行通信，UE也可以与其它UE直接进行无线通信，本申请的实施例对此不作限定。
本申请的实施例中的发送设备和接收设备可以部署在陆地上，包括室内或室外、手持或车载；也可以部署在水面上；还可以部署在空中的飞机、气球和卫星上。本申请的实施例中的UE可以是手机(mobile phone)、平板电脑(Pad)、带无线收发功能的电脑、虚拟现实(Virtual Reality，VR)终端设备、增强现实(Augmented Reality，AR)终端设备、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程医疗(remote medical)中的无线终端、智能电网(smart grid) 中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端等等。本申请的实施例对应用场景不做限定。
图1是本申请的实施例应用的通信系统的架构示意图。如图1所示，该通信系统包括核心网设备110、基站120、UE 130和UE 140通过无线连接或有线连接或其它方式连接，UE 130和UE 140可以是静止的也可以是移动的。图1只是示意图，该通信系统中还可以包括其它网络设备和/或其它终端设备，在图1中未予以画出。
本申请的实施例可以适用于下行数据传输，也可以适用于上行数据传输，还可以适用于设备到设备(device to device，D2D)的数据传输。对于下行数据传输，发送设备是基站，对应的接收设备是UE。对于上行数据传输，发送设备是UE，对应的接收设备是基站。对于D2D的数据传输，发送设备是UE，对应的接收设备也是UE。本申请的实施例对此不做限定。
在LTE系统中，用户设备(user equipment,UE)之间的资源复用有两种方式，一种是UE之间的时频资源完全不重叠，通过时分或频分的方式进行资源复用；另一种是UE之间的时频资源完全重叠，通过空分的方式进行资源复用。当UE之间的资源是通过时分或频分方式进行复用时，不同UE的参考信号也通过时分或频分方式实现正交；当UE之间的资源是通过空分的方式进行复用时，不同UE的参考信号可以通过时分、频分、时域或频域的正交覆盖码(orthogonal cover code，OCC)实现相互正交，或者也可以通过相同序列的不同的线性相位旋转实现相互正交。
在第五代(5 th generation,5G)移动通信系统的新空口(new radio，NR)中，对于多个UE或多个发射端口共享相同或者部分相同的时频资源的场景，提出分块参考信号(block reference signals)的方法，用以改善不同UE或不同发射端口的参考信号之间的正交性。分块参考信号的方案将每个UE的参考信号分成多个块，不同UE的参考信号在块内保证正交进而保证不同UE的参考信号整体正交。引入分块参考信号之后，两个UE的时频资源可以以块大小为粒度进行资源共享，而不要求空分复用的两个UE的时频资源完全重叠，从而使得UE之间的资源分配更加灵活。
在动态TDD子帧结构的应用场景中，相邻小区的上下行子帧配置可能不同，例如，小区C1当前子帧配置为上行子帧，而在小区C1的邻小区C2中，当前子帧配置为下行子帧。假设U1和U2两个UE的地理位置相邻，但U1的服务小区为C1，U2的服务小区为C2，此时，U1发送上行数据时会对U2的下行接收产生严重干扰。为了提高U2接收 数据的成功率，U2可以对来自U1的干扰信号进行干扰抑制或干扰消除。为了完成对干扰信号的干扰抑制或干扰消除，U2可以对来自U1的参考信号进行测量和估计。
在LTE系统中，传输带宽所包含的最小时频资源单元的个数n必须满足等式n＝2 x1·3 x2·5 x3，其中，x1、x2和x3为大于等于零的整数。以系统带宽为20MHz的LTE系统为例，共有35种不同的资源分配方式。不同的资源分配大小所对应的参考信号序列为不同长度的ZC序列的循环扩展，有关循环扩展在后面的图3中有详细描述。参考信号序列只与资源分配的大小有关，而与资源分配的位置无关。U2的参考信号所占的频域资源可能与U1的参考信号所占的频域资源部分重叠或完全重叠，由于U2并不知道U1的参考信号所处的起始位置以及所采用的参考信号序列，因此U2需要盲检遍历各种可能的资源分配大小以及资源分配位置，盲检的开销非常大。
为了降低盲检参考信号序列的开销，本申请的实施例提供了一种参考信号的生成方法、传输方法以及设备。本申请的实施例提供的参考信号序列均通过从一个固定长度的ZC序列中截取，而该ZC序列与资源分配大小无关，从而使得U2在盲检U1的参考信号时，无需尝试各种可能的资源分配大小所对应的ZC序列，从而降低了盲检开销。进一步地，本申请的实施例提供的参考信号序列从ZC序列中截取的时候，与资源分配位置完全对应，从而使得U2在盲检U1的参考信号时，无需尝试U1各种可能的资源分配位置，从而能进一步降低盲检开销，提升系统性能。
图2为本申请的实施例提供的一种基于ZC序列生成频域参考信号的方法，通过该方法生成的参考信号应用于通信系统时，能大大降低对参考信号的盲检次数，提升系统性能。
S210，根据ZC序列和参考信号序列的长度确定参考信号序列，该ZC序列的长度值大于最大可分配的频域资源所包含的最小时频资源单元的个数。
其中，最大可分配的频域资源为可以分配给一条无线链路的最大的频域资源，最小时频资源单元在不同的系统中可能有不同的定义，例如，在LTE系统中，最小时频资源单元称为资源元素(resource element,RE)，是一个时域符号内的一个子载波资源。以20MHz带宽的LTE系统为例，可以分配给一条无线链路的最大的频域资源为100个资源块(resource block，RB)，所包含的最小时频资源单元的个数为1200，此时最大可分配的频域资源包含的最小时频资源单元个数即为1200。
具体地，该参考信号序列是从该ZC序列中截取出来的、长度等于该参考信号序列的长度的序列。有关如何从ZC序列中截取参考信号序列可以参考后面图3中的相关描 述。
该参考信号序列的长度等于承载该参考信号序列的频域资源组中包括的最小时频资源单元的个数，即频域资源组的带宽与参考信号序列的长度对应。承载该参考信号序列的频域资源组也可以称为该参考信号的频域资源。可以理解的是，频域资源组的大小可以与最大可分配的频域资源的大小相同，也可以小于最大可分配的频域资源的大小。这里频域资源组的大小是指该频域资源组中包含的最小时频资源单元的个数。上述频域资源组在大小相同的情况下，还可以有不同的频率偏移，如图4所示，参考信号2和参考信号3的频域资源的带宽都是8个RB，但参考信号3的频域资源相对于参考信号2的频域资源偏移了12个RB。
S220，将参考信号序列映射到频域资源组上生成频域参考信号。
最大可分配的频域资源中的任意一个频域资源组上的参考信号序列均可以通过上述方法获得，并将获得的参考信号序列映射到对应的频域资源组上，生成频域参考信号。
下面对参考信号的生成过程进行更具体的描述。
ZC序列X q(m)可以用公式(1)表示：
Figure PCTCN2018071613-appb-000002
其中，m为ZC序列元素的序号，m为整数且0≤m≤N zc-1，j为虚数单位，q为所述ZC序列的根，N zc为所述ZC序列的长度，q与N zc互质。可以理解的是，在本申请中，对于数组或序列的编号，例如上述m的取值，可以有不同的编号方式，可以从1开始可以从零开始计数，本申请的实施例对此不做限定。
由q确定的ZC序列也可以称为长度为N zc的第q个ZC根序列(the q throot ZC sequence)。ZC序列具有良好的自相关性，即序列有很大的自相关峰。对于长度相同但根不同的两个ZC序列之间具有良好的互相关性，即互相关的值很小。在现有的LTE系统中，ZC序列的长度取值为质数，但在本申请的实施例中，N zc也可以为非质数。
由公式(1)定义的ZC序列，实质上是一个长度为N zc的ZC序列的集合，序列集合中可以包含不同的q的取值下的ZC序列。
当参考信号序列的长度与ZC序列不一致时，可以根据ZC序列X q(m)生成参考信号序列的基序列(base sequence)
Figure PCTCN2018071613-appb-000003
如公式(2)所示：
Figure PCTCN2018071613-appb-000004
其中，n为基序列的元素序号，n为整数且0≤n≤N-1，N为基序列的长度。如图3中的(a)图所示，当N大于N zc时，公式(2)可以理解为将长度为N zc的ZC序列通过循环扩展得到长度为N的基序列；如图3中的(b)图所示，当N小于N zc时，公式(2)可以理解为将长度为N zc的ZC序列通过截断得到长度为N的基序列。
由于ZC序列的长度N zc大于最大可分配的频域资源包含的最小时频资源单元的个数，即N zc＞N，因此公式(2)实际为将长度为N zc的ZC序列通过截断得到长度为N的参考信号序列。于是，公式(2)可以简化表示为：
Figure PCTCN2018071613-appb-000005
公式(2)和公式(3)将长度为N zc的ZC序列从序列起始位置开始取出数据得到长度为N的参考信号序列，即将ZC序列超出N长度的末端部分数据进行截断。本申请对截断数据的起始位置和截断方式不做限定，例如，也可以从序列的第n 0个数据元素开始取出数据得到长度为N的参考信号序列。
为了进一步获得更多的参考信号序列，可以对基序列
Figure PCTCN2018071613-appb-000006
在频域进行不同的频域的线性相位旋转(linear phase rotation)。对同一个基序列进行不同的线性相位旋转后得到的不同的参考信号序列之间完全正交，因此这些通过线性相位旋转得到的参考信号序列之间没有干扰。基序列
Figure PCTCN2018071613-appb-000007
经过线性相位旋转后得到参考信号序列
Figure PCTCN2018071613-appb-000008
如公式(4)所示：
Figure PCTCN2018071613-appb-000009
其中，α为线性相位旋转的相位，α为实数，假设α＝(c·π)/6，则c的取值可以为0到11，这样从一个基本参考信号序列通过不同的相位旋转就可以得到12个不同的相互正交的参考信号序列。在频域上进行线性相位旋转相当于在时域上进行了循环移位(cyclic shift)。
综合公式(2)和(4)，由ZC序列X q(m)生成参考信号序列
Figure PCTCN2018071613-appb-000010
的方法可以如公式(5)所示：
Figure PCTCN2018071613-appb-000011
综合公式(3)和(4)，由ZC序列X q(m)生成参考信号序列
Figure PCTCN2018071613-appb-000012
的方法可以如公式(6)所示：
Figure PCTCN2018071613-appb-000013
ZC序列X q(m)可以通过ZC序列的长度N zc的取值和ZC序列的根q的取值确定，对应地，由ZC序列X q(m)生成的参考信号序列的基序列
Figure PCTCN2018071613-appb-000014
可以通过ZC序列的长度N zc的取值和ZC序列的根q的取值确定,由ZC序列X q(m)生成的参考信号序列
Figure PCTCN2018071613-appb-000015
可以通过ZC序列的长度N zc的取值、ZC序列的根q的取值以及线性相位旋转的相位α确定。
实际应用时，一种可能的实现是根据小区标识确定该小区所使用的ZC序列的根，然后从该ZC序列中截取长度为该参考信号序列长度的序列作为参考信号序列。对这样生成的参考信号进行盲检的时候所需要尝试的ZC序列与参考信号的资源分配大小无关，能够降低盲检次数，从而降低了盲检开销。
图4示出了一种从ZC序列中截取参考信号序列方法，参考信号序列进一步根据承载该参考信号序列的频域资源组在最大可分配的频域资源中的位置确定。如图4所示，参考信号0的频域资源是从编号为0的资源元素(resource element，RE)开始分配的，参考信号0的频域资源大小也就是承载参考信号0的参考信号序列的频域资源组的大小为20个RB，即240个RE，因此从ZC序列的0号位置开始截取一个长度为240的序列作为参考信号0的参考信号序列。参考信号1的频域资源大小为12个RB，从ZC序列的96号位置开始截取一个长度为144的序列作为参考信号1的参考信号序列；参考信号2和参考信号3的频域资源大小均为8个RB，从ZC序列的0号位置开始截取一个长度为96的序列作为参考信号2的参考信号序列，从ZC序列的144号位置开始截取一个长度为96的序列作为参考信号3的参考信号序列。
根据本申请的实施例所提供的参考信号生成方法所生成的参考信号序列，是从ZC序列中截取一段与频域资源组的位置完全对应的序列，从而使得在盲检该参考信号时，无需尝试各种可能的频域资源组的位置，可以进一步降低盲检次数，从而降低盲检开销，提升系统性能。
下面以参考信号序列根据频域资源组的起始位置在最大可分配的频域资源中的位置确定为例进行说明，可以理解的是，参考信号序列也可以根据频域资源组的终止位置在最大可分配的频域资源中的位置确定，但本申请的实施例对此并不做限定。
设频域资源组的起始位置为N ini，且该频域资源组包含的最小时频资源单元是连续的，则参考信号序列R q(n)可以用公式(7)表示：
Figure PCTCN2018071613-appb-000016
综合公式(5)和公式(7)，则由ZC序列X q(m)生成参考信号序列R q(n)的方法可以如公式(8)所示：
R q(n)＝e j·α·nX q((n+N ini)modN zc)                  (8)
综合公式(6)和公式(7)，则由ZC序列X q(m)生成参考信号序列R q(n)的方法可以如公式(9)所示：
R q(n)＝e j·α·nX q(n+N ini)                      (9)
其中，n+N ini＜N ZC。
以系统带宽为20MHz的LTE系统为例，最大可分配的频域资源为100个RB，考虑参考信号带宽可以为1个RB到100个RB之间所有可能的分配带宽。以RCM<5.3,最大互相关小于0.73，需要ZC序列的根的数目30个为约束条件，满足这些约束条件的ZC序列的根q的取值如表1所示,表中ZC序列的长度N zc为479971,q idx为q的编号示意。一组相同长度的序列的最大互相关是指对这组序列中任意两个序列进行互相关运算得到的互相关结果中的最大幅度值。根据表1中的q的取值生成ZC序列，进一步根据上述生成参考信号的方法生成的参考信号，具有低PAPR/RCM的特性，同时能够大大降低对该参考信号的盲检开销，提升系统性能。
表1
q idx 0 1 2 3 4 5 6 7 8 9
q 24335 35852 49443 65019 76272 88558 102028 126841 139505 150710
q idx 10 11 12 13 14 15 16 17 18 19
q 169872 181751 197023 210577 222328 253191 264402 276530 296245 307534
q idx 20 21 22 23 24 25 26 27 28 29
q 329261 340466 352513 368238 387393 402362 413569 424829 437224 448552
以系统带宽为20MHz的LTE系统为例，当参考信号带宽为1个RB或2个RB时，参考信号采用的是通过计算机搜索得到的正交相移键控(quadrature phase shift keying，QPSK)序列，3个RB及以上采用ZC序列。考虑到这些通过计算机搜索得到的QPSK序列的PAPR/RCM很低，另一个可能的实施例是，对于参考信号带宽为1个RB和2个RB时，仍然采用现有的LTE系统中的QPSK序列生成参考信号序列，而对于参考信号带宽为3 个RB到100个RB之间所有可能的分配带宽时，采用上述参考信号序列生成方法生成参考信号序列。可以理解的是，参考信号带宽也就是频域资源组的带宽。以RCM<5.1,最大互相关小于0.445，需要ZC序列的根的数目30个为约束条件，满足这些约束条件的ZC序列的根q的取值如表2所示，表中ZC序列的长度N zc为119993。根据表2所示的ZC序列的根序列生成的参考信号与根据表1所示的ZC序列的根序列生成的参考信号相比，虽然会增加盲检次数，但是PAPR/RCM更低。
表2
q idx 0 1 2 3 4 5 6 7 8 9
q 2197 3470 4396 6191 7683 9025 10362 11745 13755 14512
q idx 10 11 12 13 14 15 16 17 18 19
q 17680 18691 20638 23545 24419 25507 30658 37305 40689 52894
q idx 20 21 22 23 24 25 26 27 28 29
q 58095 67099 71288 79123 82688 89335 108248 110302 112310 116074
本申请的另一种可能的实施例，对频域资源组可能的带宽分配进行分段，分别采用不同的序列组生成参考信号序列。例如：频域资源组的带宽为1个RB和2个RB为第一组，继续采用当前LTE系统中QPSK序列生成参考信号序列；频域资源组的带宽为3个RB到30个RB为第二组，采用如表3所示的一组ZC序列的根序列生成参考信号序列；频域资源组的带宽为31个RB到100个RB为第三组，采用如表4所示的一组ZC序列的根序列生成参考信号序列。根据表3和表4所示的ZC序列的根序列生成的参考信号与根据表1所示的ZC序列的根序列生成的参考信号相比，虽然会增加盲检次数，但是PAPR/RCM更低。
考虑频域资源组为3个RB到30个RB之间所有可能的分配带宽，以RCM<4.9,最大互相关小于0.39，需要ZC序列的根的数目30个为约束条件，满足这些约束条件的ZC序列的根q的取值如表3所示，表中ZC序列的长度N zc为119993。
表3
q idx 0 1 2 3 4 5 6 7 8 9
q 2012 3107 4228 5550 6811 7801 8812 10235 11558 12790
q idx 10 11 12 13 14 15 16 17 18 19
q 14316 16717 17689 18802 20361 21503 23269 24419 29129 30559
q idx 20 21 22 23 24 25 26 27 28 29
q 33516 34631 37305 39162 43862 55093 75465 91126 112310 116886
考虑频域资源组为31个RB到100个RB之间所有可能的分配带宽，以RCM<4.9,最大互相关小于0.16，需要ZC序列的根的数目30个为约束条件，满足这些约束条件的ZC序列的根q的取值如表4所示，表中ZC序列的长度N zc为119993。
表4
q idx 0 1 2 3 4 5 6 7 8 9
q 507 1075 3666 9383 10860 13232 19372 22346 23875 26108
q idx 10 11 12 13 14 15 16 17 18 19
q 27421 28546 29868 35720 38589 39706 41607 42816 47593 51350
q idx 20 21 22 23 24 25 26 27 28 29
q 56401 58475 59690 72113 73763 88022 92572 93944 100080 105692
最大可分配的频域资源包含的最小时频资源单元个数根据实际的情况可以发生变化。以LTE为例，最大可分配带宽为110个RB，满足子载波个数n＝2 x1·3 x2·5 x3的最大实际可分配带宽为108个RB，其中，x1、x2和x3为大于等于零的整数。但是实际应用中，由于需要考虑预留一定的保护带宽，因此LTE的最大可分配的频域资源为100个RB即1200个子载波。对于采用滤波和加窗交叠相加(weighted overlap and add，WOLA)等方式改善波形的带外(out of band,OOB)抑制，或者不需要那么宽的保护带的情况，实际最大可分配的频域资源可以超过100个RB。
对于最大可分配的频域资源为108个RB共1296个子载波情况，考虑频域资源组可以为3个RB到108个RB之间所有可能的分配带宽时；以RCM<5.1,最大互相关小于0.44，需要ZC序列的根的数目30个为约束条件，满足这些约束条件的ZC序列的根q的取值如表5所示，表中ZC序列的长度N zc为131969。
表5
q idx 0 1 2 3 4 5 6 7 8 9
q 2908 5919 8108 9176 11359 12842 13721 18287 19213 21435
q idx 10 11 12 13 14 15 16 17 18 19
q 22441 25895 27039 30666 36263 38169 40822 42738 44949 51705
q idx 20 21 22 23 24 25 26 27 28 29
q 54664 59740 61399 67366 68376 70570 78403 82997 86400 95108
对于最大可分配的频域资源为108个RB共1296个子载波情况，考虑频域资源组可以为3个RB到108个RB之间所有可能的分配带宽时；以RCM<5.2,最大互相关小于0.5，需要ZC序列的根的数目60个为约束条件，满足这些约束条件的ZC序列的根q的取值如表6所示，表中ZC序列的长度N zc为131969。
表6
q idx 0 1 2 3 4 5 6 7 8 9
q 2150 2908 3741 4942 5644 6727 8108 9176 11359 12842
q idx 10 11 12 13 14 15 16 17 18 19
q 13572 15178 16174 18065 19213 21357 22391 23057 25801 27039
q idx 20 21 22 23 24 25 26 27 28 29
q 28108 29864 30666 31734 33739 36263 38169 39193 40822 41510
q idx 30 31 32 33 34 35 36 37 38 39
q 42738 44750 45569 51705 53466 54488 57977 59740 61399 62351
q idx 40 41 42 43 44 45 46 47 48 49
q 63593 64325 67298 70564 78403 86400 90459 91147 95108 98230
q idx 50 51 52 53 54 55 56 57 58 59
q 100235 101303 109578 112756 115795 116791 118248 122793 125242 126752
可选地，互相关可以不作为约束条件，以PAPR/RCM/低立方度量(cubic metric，CM)作为约束条件。以系统带宽为20MHz的LTE系统为例，最大可分配的频域资源为100个RB，考虑参考信号带宽可以为1个RB到100个RB之间所有可能的分配带宽。以RCM<5.3，互相关不设置阈值，需要ZC序列的根的数目60个为约束条件，满足这些约束条件的ZC序列的根q的取值如表6A所示，表中ZC序列的长度N zc为21157,q idx为q的编号示意。
表6A
q idx 1 2 3 4 5 6 7 8 9 10
q 1149 1203 1215 1345 1827 1873 1962 2040 2276 2927
q idx 11 12 13 14 15 16 17 18 19 20
q 2931 3196 3201 3223 3406 3787 5596 6247 6276 6426
q idx 21 22 23 24 25 26 27 28 29 30
q 7736 7749 7768 8693 8767 8779 8970 9216 9983 9996
q idx 31 32 33 34 35 36 37 38 39 40
q 11161 11174 11941 12187 12378 12390 12464 13389 13408 13421
q idx 41 42 43 44 45 46 47 48 49 50
q 14731 14881 14910 15561 17370 17751 17934 17956 17961 18226
q idx 51 52 53 54 55 56 57 58 59 60
q 18230 18881 19117 19195 19284 19330 19812 19942 19954 20008
以系统带宽为20MHz的LTE系统为例，最大可分配的频域资源为110个RB，考虑参考信号带宽可以为1个RB到110个RB之间所有可能的分配带宽。以RCM<5.3，互相关不设置阈值，需要ZC序列的根的数目60个为约束条件，满足这些约束条件的ZC序列的根q的取值如表6B所示，表中ZC序列的长度N zc为22109,q idx为q的编号示意。
表6B
q idx 1 2 3 4 5 6 7 8 9 10
q 1359 1447 1662 1901 1903 1945 2540 2666 2995 3572
q idx 11 12 13 14 15 16 17 18 19 20
q 3874 4709 5039 5871 6681 6743 6933 7943 8165 8439
q idx 21 22 23 24 25 26 27 28 29 30
q 8463 9126 9175 9592 9713 9898 10278 10343 10344 10371
q idx 31 32 33 34 35 36 37 38 39 40
q 11738 11765 11766 11831 12211 12396 12517 12934 12983 13646
q idx 41 42 43 44 45 46 47 48 49 50
q 13670 13944 14166 15176 15366 15428 16238 17070 17400 18235
q idx 51 52 53 54 55 56 57 58 59 60
q 18537 19114 19443 19569 20164 20206 20208 20447 20662 20750
以系统带宽为20MHz的LTE系统为例，最大可分配的频域资源为100个RB，考虑参考信号带宽可以为3个RB到100个RB之间所有可能的分配带宽，1个RB和2个RB采用当前LTE系统中QPSK序列生成参考信号序列。以RCM<5.3，互相关不设置阈值，需要ZC序列的根的数目60个为约束条件，满足这些约束条件的ZC序列的根q的取值如表6C所示，表中ZC序列的长度N zc为8431,q idx为q的编号示意。
表6C
q idx 1 2 3 4 5 6 7 8 9 10
q 149 163 239 245 250 328 341 390 437 1092
q idx 11 12 13 14 15 16 17 18 19 20
q 1168 1231 1232 1259 1284 1451 1478 2164 2206 2276
q idx 21 22 23 24 25 26 27 28 29 30
q 2625 2738 2748 3088 3344 3414 3651 3812 4090 4140
q idx 31 32 33 34 35 36 37 38 39 40
q 4291 4341 4619 4780 5017 5087 5343 5683 5693 5806
q idx 41 42 43 44 45 46 47 48 49 50
q 6155 6225 6267 6953 6980 7147 7172 7199 7200 7263
q idx 51 52 53 54 55 56 57 58 59 60
q 7339 7994 8041 8090 8103 8181 8186 8192 8268 8282
以系统带宽为20MHz的LTE系统为例，最大可分配的频域资源为110个RB，考虑参考信号带宽可以为3个RB到110个RB之间所有可能的分配带宽，1个RB和2个RB采用当前LTE系统中QPSK序列生成参考信号序列。以RCM<5.3，互相关不设置阈值，需要ZC序列的根的数目60个为约束条件，满足这些约束条件的ZC序列的根q的取值如表6D所示，表中ZC序列的长度N zc为9781,q idx为q的编号示意。
表6D
q idx 1 2 3 4 5 6 7 8 9 10
q 214 293 366 437 531 841 1189 1588 1680 1741
q idx 11 12 13 14 15 16 17 18 19 20
q 1805 1856 2118 2352 2389 2627 2820 2837 3336 3366
q idx 21 22 23 24 25 26 27 28 29 30
q 3440 3715 3847 3971 4015 4242 4664 4713 4754 4761
q idx 31 32 33 34 35 36 37 38 39 40
q 5020 5027 5068 5117 5539 5766 5810 5934 6066 6341
q idx 41 42 43 44 45 46 47 48 49 50
q 6415 6445 6944 6961 7154 7392 7429 7663 7925 7976
q idx 51 52 53 54 55 56 57 58 59 60
q 8040 8101 8193 8592 8940 9250 9344 9415 9488 9567
上述表1至表6D中的q idx只是q的取值的一个编号示意，并不限定q的取值的顺序，q idx还有其它的编号形式，例如，可以从0开始编号，也可以按照其它的顺序进行编号。例如，表5中的q＝2908对应的编号q idx为0，该编号也可以为1，也可以为30，也可以取其它值。上述表1至表6D也可以没有q idx，仅仅给出对应的q的取值的集合即可。
本身申请的实施例还提供了另一种从ZC序列中截取参考信号序列方法：参考信号序列从ZC序列中截取参考信号序列时，不考虑承载该参考信号序列的频域资源组在最大可分配的频域资源中的位置。例如，无论该频域资源组在最大可分配的频域资源中的位置在哪，都从该ZC序列的开始截取一段长度为参考信号序列长度的序列作为参考信号序列。
本申请同样适用于频域资源组包含的最小时频资源单元是梳状分布的情况。一种可能的实施例如图5所示，参考信号0的频域资源组中的最小时频资源单元是梳状分布的，且相邻最小时频资源单元之间是等间隔的，间隔为N space个最小时频资源单元。参考信号1的频域资源组中的最小时频资源单元也是离散映射的，参考信号0和参考信号1的频域资源组的大小可以相同也可以不同。长度为N的参考信号序列离散映射到频域资源组上生成频域参考信号，其中，参考信号序列根据频域资源组在最大可分配的频域资源中的位置和频域资源组中相邻的两个最小时频资源单元之间的间隔确定。具体地，由线性相位旋转后的序列
Figure PCTCN2018071613-appb-000017
得到参考信号序列R q(n)可以用公式(10)表示：
Figure PCTCN2018071613-appb-000018
综合公式(8)和公式(10)，则由ZC序列X q(m)生成映射到离散的频域资源组上的参考信号序列R q(n)的方法可以如公式(11)所示：
R q(n)＝e j·α·nX q((n·N space+N ini)modN zc)              (11)
综合公式(9)和公式(10)，则由ZC序列X q(m)生成映射到离散的频域资源组上的参考信号序列R q(n)的方法可以如公式(12)所示：
R q(n)＝e j·α·nX q(n·N space+N ini)                  (12)
其中，n·N space+N ini＜N ZC。
可选的，长度为N的参考信号序列离散映射到频域资源组上生成频域参考信号，其中，参考信号序列根据频域资源组在最大可分配的频域资源中的位置确定，和频域资源组中相邻的两个最小时频资源单元之间的间隔无关。如图5A所示，参考信号0对应的频域资源组中的最小时频资源单元是梳状分布的，且相邻最小时频资源单元之间是等间隔的，间隔为N space个最小时频资源单元。参考信号1的频域资源组中的最小时频资源单元也是梳状分布的，参考信号0和参考信号1的频域资源组的大小可以相同也可以不同。长度为N的参考信号序列由ZC序列连续截取长度为N的数据得到，截取的数据只与参考信号序列的长度相关，例如，从ZC序列的头部开始截取，也可以从一个预定义的偏移位置开始截取，本申请的实施例对此不做限定。下面以从ZC序列的头部开始截取为例，具体地，由线性相位旋转后的序列
Figure PCTCN2018071613-appb-000019
得到参考信号序列R q(n)可以用公式(13)表示：
Figure PCTCN2018071613-appb-000020
综合公式(5)和公式(13)，则由ZC序列X q(m)生成映射到离散的频域资源组上的参考信号序列R q(n)的方法可以如公式(14)所示：
R q(n)＝e j·α·nX q(nmodN zc)                   (14)
综合公式(6)和公式(13)，则由ZC序列X q(m)生成映射到离散的频域资源组上的参考信号序列R q(n)的方法可以如公式(15)所示：
R q(n)＝e j·α·nX q(n)                       (15)
可选的，长度为N的参考信号序列映射到频域资源组上生成频域参考信号，参考信号序列由ZC序列集合中的ZC序列确定，ZC序列集合中的ZC序列的长度大于最大可分配的频域资源包含的最小时频资源单元个数，该ZC序列集合包括至少两个不同长度ZC 序列。
以系统带宽为20MHz的LTE系统为例，最大可分配的频域资源为100个RB，考虑参考信号带宽可以为3个RB到100个RB之间所有可能的分配带宽，以RCM<5.4,最大互相关小于0.4，需要的ZC序列的根的数目30个为约束条件，满足这些约束条件的ZC序列的长度N k和ZC序列的根q的取值如表7所示。
表7
序列序号 0 1 2 3 4 5 6 7 8 9
N zc 1319 1319 1319 1319 1319 1319 1319 1319 1319 1321
q 26 75 123 256 639 679 979 1196 1293 50
序列序号 10 11 12 13 14 15 16 17 18 19
N zc 1321 1321 1321 1321 1321 1321 1321 1321 1321 1321
q 342 429 449 483 570 582 751 838 1072 1265
序列序号 20 21 22 23 24 25 26 27 28 29
N zc 1323 1325 1327 1327 1329 1331 1333 1333 1333 1333
q 1063 62 596 731 563 159 170 552 780 1104
上述表7中的序列序号只是N zc和q的取值组合的一个编号示意，并不限定N zc和q的取值组合的顺序，该序列序号还有其它的编号形式，例如，可以从0开始编号，也可以按照其它的顺序进行编号。例如，表7中的N zc＝1319，q＝75对应的序列序号为1，该序列序号也可以为0，也可以为30，也可以取其它值。上述表7也可以没有序列序号。
如图6所示，本申请的实施例还提供了一种参考信号的传输方法。
S610，发送设备将频域的参考信号变换到时域以生成时域的参考信号，其中，所述频域的参考信号包括映射到频域资源组上的参考信号序列，所述参考信号序列根据ZC序列和所述参考信号序列的长度确定，所述ZC序列的长度值大于最大可分配的频域资源包含的最小时频资源单元的个数。可以理解的是，所述参考信号序列的长度小于等于最大可分配的频域资源包含的最小时频资源单元的个数，也就是说频域资源组的带宽小于等于最大可分配的频域资源。
进一步地，所述参考信号序列还根据所述频域资源组在最大可分配的频域资源中的位置确定。
进一步地，所述参考信号序列还根据所述频域资源组中相邻两个最小时频资源单元 的间隔确定。
具体地，频域的参考信号的生成方法可以参考如图2所示的方法。
常用的频域到时域的变换方法是离散傅里叶反变换(inverse discrete Fourier transform，IDFT)和快速傅立叶反变(inverse fast Fourier transform，IFFT)，但本申请的实施例对此并不做限定。
S620，发送设备发送所述时域的参考信号。
可以理解的是，发送设备在发送上述时域的参考信号之前，还可以经过数模转换(将数字信号转换为模拟信号)和载波调制(将基带信号调制到射频载波上)等处理，然后通过天线将信号发射出去。
如图7所示，本申请的实施例提供了另一种参考信号的传输方法。
S710，接收设备接收时域参考信号。
可以理解的是，接收设备通过天线从无线信道中接收无线信号，上述无线信号中包括上述时域的参考信号。
S720，接收设备将时域的参考信号变换到频域生成频域的参考信号，其中，所述频域的参考信号包括映射到频域资源组上的参考信号序列，所述参考信号序列根据ZC序列和所述参考信号序列的长度确定，所述ZC序列的长度值大于最大可分配的频域资源包含的最小时频资源单元的个数。可以理解的是，所述参考信号序列的长度小于等于最大可分配的频域资源包含的最小时频资源单元的个数，也就是说频域资源组的带宽小于等于最大可分配的频域资源。
进一步地，所述参考信号序列还根据所述频域资源组在最大可分配的频域资源中的位置确定。
进一步地，所述参考信号序列还根据所述频域资源组中相邻两个最小时频资源单元的间隔确定。
接收设备对参考信号进行测量，获得对发送设备和接收设备之间的无线信道参数的估计，该信道估计结果可以用于对发送设备发送的数据进行解调；或者获得对发送设备和接收设备之间的信道质量的测量，该信道质量测量结果可以用于发送该设备和接收设备之间数据传输的链路自适应以及资源分配等。对序列的测量结果也可以用于定位测量，本申请对参考信号的用途不做限定。
实际应用的时候，发送设备获取参考信号序列的方法，可以是从存储器中获取已经生成的参考信号序列，也可以是根据参考信号序列的相关参数实时生成参考信号序列。
发送设备获取参考信号序列相关参数的方法，可以是从存储器中获取，也可以是由网络设备统一分配参考信号序列，再通过信令将参考信号序列的相关参数发送给发送设备，发送设备使用该参考信号序列的相关参数获取参考信号序列。这里的ZC序列的相关参数可以包括用于指示ZC序列长度值、ZC序列的根的取值和线性相位旋转的相位的取值中的至少一个。这里的网络设备可以是基站NodeB、演进型基站eNodeB、5G通信系统中的基站或其它网络设备。
接收设备为了对上述接收到的参考信号进行测量，接收设备可以参考如图2所示的频域的参考信号的生成过程，生成一个与发送设备生成的频域参考信号一样的频域参考信号。具体地，接收设备获取参考信号序列的方法可以是先获取参考信号序列的相关参数，然后使用该参数生成参考信号序列。接收设备获取参考信号序列的相关参数的方法：可以是发送设备获取到参考信号序列的相关参数之后，通过信令将参考信号序列的相关参数发送给接收设备；也可以是网络设备通过信令将参考信号序列的相关参数发送给接收设备。
发送设备和接收设备还可以通过隐式的方式获得参考信号序列的相关参数，例如，通过小区标识、时隙号等方式隐式确定参考信号序列的相关参数。
上述本申请提供的实施例中，分别从发送设备、接收设备以及发送设备和接收设备之间交互的角度对本申请实施例提供的参考信号序列生成方法以及参考信号传输方法等各方案进行了介绍。可以理解的是，各个设备，例如发送设备和接收设备等为了实现上述功能，其包含了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到，结合本文中所公开的实施例描述的各示例的单元及方法步骤，本申请能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
图8和图9为本申请的实施例提供的两种可能的通信装置的结构示意图。该通信装置实现上述参考信号传输方法实施例中发送设备的功能，因此也能实现上述参考信号传输方法所具备的有益效果。在本申请的实施例中，该通信装置可以是如图1所示的UE130或UE140或基站120，还可以是其它使用参考信号进行无线通信的发送侧设备。
如图8所示，通信装置800包括处理单元810和发送单元820。
处理单元810，用于将频域的参考信号变换到时域以生成时域的参考信号，其中， 所述频域的参考信号包括映射到频域资源组上的参考信号序列，所述参考信号序列根据ZC序列和所述参考信号序列的长度确定，所述ZC序列的长度值大于最大可分配的频域资源包含的最小时频资源单元的个数。
发送单元820，用于发送所述时域的参考信号。
如图9所示，通信装置900包括处理器910,收发器920和存储器930，其中，存储器930可以用于存储处理器910执行的代码。通信装置900中的各个组件之间通过内部连接通路互相通信，如通过总线传递控制和/或数据信号。
处理器910，用于将频域的参考信号变换到时域以生成时域的参考信号，其中，所述频域的参考信号包括映射到频域资源组上的参考信号序列，所述参考信号序列根据ZC序列和所述参考信号序列的长度确定，所述ZC序列的长度值大于最大可分配的频域资源包含的最小时频资源单元的个数。
收发器920，用于发送所述时域的参考信号。
有关上述处理单元810、处理器910和发送单元820、收发器920更详细的功能描述可以参考上述方法实施例直接得到，在此不加赘述。
图10和图11为本申请的实施例的另外两种可能的通信装置的结构示意图。该通信装置实现上述参考信号传输方法实施例中接收设备的功能，因此也能实现上述参考信号传输方法所具备的有益效果。在本申请的实施例中，该通信装置可以是如图1所示的UE130或UE140或基站120，还可以是其它使用参考信号进行无线通信的接收侧设备。
如图10所示，通信装置1000包括接收单元1010和处理单元1020。
接收单元1010，用于接收时域的参考信号。
处理单元1020，用于将时域的参考信号变换到频域以生成频域的参考信号，其中，所述频域的参考信号包括映射到频域资源组上的参考信号序列，所述参考信号序列根据ZC序列和所述参考信号序列的长度确定，所述ZC序列的长度值大于最大可分配的频域资源包含的最小时频资源单元的个数。
如图11所示，通信装置1100包括处理器1120,收发器1110和存储器1130，其中，存储器1130可以用于存储处理器1120执行的代码。通信装置1100中的各个组件之间通过内部连接通路互相通信，如通过总线传递控制和/或数据信号。
收发器1110，用于接收时域的参考信号。
处理器1120，用于将时域的参考信号变换到频域以生成频域的参考信号，其中，所述频域的参考信号包括映射到频域资源组上的参考信号序列，所述参考信号序列根据ZC 序列和所述参考信号序列的长度确定，所述ZC序列的长度值大于最大可分配的频域资源包含的最小时频资源单元的个数。
可以理解的是，图9和图11仅仅示出了该通信装置的一种设计。在实际应用中，该通信装置可以包括任意数量的接收器和处理器，而所有可以实现本申请的实施例的通信装置都在本申请的保护范围之内。
有关上述接收单元1010、收发器1110和处理单元1020、处理器1120更详细的功能描述可以参考上述方法实施例直接得到，在此不加赘述。
可以理解的是，本申请的实施例中的处理器可以是中央处理单元(Central Processing Unit，CPU)，还可以是其他通用处理器、数字信号处理器(Digital Signal Processor，DSP)、专用集成电路(Application Specific Integrated Circuit，ASIC)、现场可编程门阵列(Field Programmable Gate Array，FPGA)或者其他可编程逻辑器件、晶体管逻辑器件，硬件部件或者其任意组合。通用处理器可以是微处理器，也可以是任何常规的处理器。
本申请的实施例中的方法步骤可以通过硬件的方式来实现，也可以由处理器执行软件指令的方式来实现。软件指令可以由相应的软件模块组成，软件模块可以被存放于随机存取存储器(Random Access Memory，RAM)、闪存、只读存储器(Read-Only Memory，ROM)、可编程只读存储器(Programmable ROM，PROM)、可擦除可编程只读存储器(Erasable PROM，EPROM)、电可擦除可编程只读存储器(Electrically EPROM，EEPROM)、寄存器、硬盘、移动硬盘、CD-ROM或者本领域熟知的任何其它形式的存储介质中。一种示例性的存储介质耦合至处理器，从而使处理器能够从该存储介质读取信息，且可向该存储介质写入信息。当然，存储介质也可以是处理器的组成部分。处理器和存储介质可以位于ASIC中。另外，该ASIC可以位于发送设备或接收设备中。当然，处理器和存储介质也可以作为分立组件存在于发送设备或接收设备中。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者通过所述计算机可读存储介质进行传输。所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(DSL)) 或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质(例如固态硬盘Solid State Disk(SSD))等。
可以理解的是，在本申请的实施例中涉及的各种数字编号仅为描述方便进行的区分，并不用来限制本申请的实施例的范围。
可以理解的是，在本申请的实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请的实施例的实施过程构成任何限定。
以上所述，仅为本申请的实施例的具体实施方式，任何熟悉本技术领域的技术人员在本申请公开揭露的技术范围内，可轻易想到的变化或替换，都应涵盖在本申请的实施例的保护范围之内。

Claims (34)

  1. 一种参考信号传输方法，其特征在于，所述方法包括：
    将频域的参考信号变换到时域以生成时域的参考信号，其中，所述频域的参考信号包括映射到频域资源组上的参考信号序列，所述参考信号序列根据Zadoff-Chu序列和所述参考信号序列的长度确定，所述Zadoff-Chu序列的长度值大于最大可分配的频域资源包含的子载波的个数，所述频域资源组的带宽小于等于最大可分配的频域资源；
    发送所述时域的参考信号。
  2. 根据权利要求1所述的方法，其特征在于，所述参考信号序列还根据所述频域资源组在最大可分配的频域资源中的位置确定。
  3. 根据权利要求1或2所述的方法，其特征在于，所述参考信号序列还根据所述频域资源组中相邻的两个子载波的间隔确定。
  4. 根据权利要求1至3任一项所述的方法，其特征在于，所述Zadoff-Chu序列为X q(m)，X q(m)根据
    Figure PCTCN2018071613-appb-100001
    确定；
    其中，j为虚数单位，m为所述Zadoff-Chu序列元素的序号，m为整数且0≤m≤N zc-1，N zc为所述Zadoff-Chu序列的长度值，q为所述ZC序列的根的取值，q与N zc互质。
  5. 根据权利4所述的方法，其特征在于，所述Zadoff-Chu序列长度N zc为21157，所述Zadoff-Chu序列的根q的取值为以下中的一个：1149,1203,1215,1345,1827,1873,1962,2040,2276,2927,2931,3196,3201,3223,3406,3787,5596,6247,6276,6426,7736,7749,7768,8693,8767,8779,8970,9216,9983,9996,11161,11174,11941,12187,12378,12390,12464,13389,13408,13421,14731,14881,14910,15561,17370,17751,17934,17956,17961,18226,18230,18881,19117,19195,19284,19330,19812,19942,19954,20008。
  6. 根据权利4所述的方法，其特征在于，所述Zadoff-Chu序列长度N zc为131969，所述Zadoff-Chu序列的根q的取值为以下中的一个：2908，5919，8108,9176,11359,12842,13721,18287,19123,21435,22441,25895,27039,30666,36263,38169,40822,42738，44949,51705,54664,59740,61399,67366,68376,70570,78403,82997,86400,95108。
  7. 根据权利6所述的方法，其特征在于，所述频域资源组的带宽大于等于3个资源块RB。
  8. 根据权利4所述的方法，其特征在于，所述Zadoff-Chu序列长度N zc为479971，所述Zadoff-Chu序列的根q的取值为以下中的一个：24335,35852,49443，65019，76272，88558，102028，126841，139505，150710，169872，181751，197023，210577，222328，253191，264402，276530，296245，307534，329261，340466，352513，368238，387393，402362，413569，424829，437224，448552。
  9. 一种通信装置，其特征在于，包括：
    处理单元，用于将频域的参考信号变换到时域以生成时域的参考信号，其中，所述频域的参考信号包括映射到频域资源组上的参考信号序列，所述参考信号序列根据Zadoff-Chu序列和所述参考信号序列的长度确定，所述Zadoff-Chu序列的长度值大于最大可分配的频域资源包含的子载波的个数；
    发送单元，用于发送所述时域的参考信号。
  10. 根据权利要求9所述的通信装置，其特征在于，所述参考信号序列还根据所述频域资源组在最大可分配的频域资源中的位置确定。
  11. 根据权利要求9或10所述的通信装置，其特征在于，所述参考信号序列还根据所述频域资源组中相邻的两个子载波的间隔确定。
  12. 根据权利要求9至11任一项所述的通信装置，其特征在于，所述Zadoff-Chu序列为X q(m)，X q(m)根据
    Figure PCTCN2018071613-appb-100002
    确定；
    其中，j为虚数单位，m为所述Zadoff-Chu序列元素的序号，m为整数且0≤m≤N zc-1，N zc为所述Zadoff-Chu序列的长度值，q为所述ZC序列的根的取值，q与N zc互质。
  13. 根据权利12所述的通信装置，其特征在于，所述Zadoff-Chu序列长度N zc为21157，所述Zadoff-Chu序列的根q的取值为以下中的一个：1149,1203,1215,1345,1827,1873,1962,2040,2276,2927,2931,3196,3201,3223,3406,3787,5596,6247,6276,6426,7736,7749,7768,8693,8767,8779,8970,9216,9983,9996,11161,11174,11941,12187,12378,12390,12464,13389,13408,13421,14731,14881,14910,15561,17370,17751,17934,17956,17961,18226,18230,18881,19117,19195,19284,19330,19812,19942,19954,20008。
  14. 根据权利12所述的通信装置，其特征在于，所述Zadoff-Chu序列长度N zc为131969，所述Zadoff-Chu序列的根q的取值为以下中的一个：2908，5919， 8108,9176,11359,12842,13721,18287,19123,21435,22441,25895,27039,30666,36263,38169,40822,42738，44949,51705,54664,59740,61399,67366,68376,70570,78403,82997,86400,95108。
  15. 根据权利14所述的通信装置，其特征在于，所述频域资源组的带宽大于等于3个资源块RB。
  16. 根据权利12所述的通信装置，其特征在于，所述Zadoff-Chu序列长度N zc为479971，所述Zadoff-Chu序列的根q的取值为以下中的一个：24335,35852,49443，65019，76272，88558，102028，126841，139505，150710，169872，181751，197023，210577，222328，253191，264402，276530，296245，307534，329261，340466，352513，368238，387393，402362，413569，424829，437224，448552。
  17. 一种参考信号传输方法，其特征在于，所述方法包括：
    接收时域的参考信号；
    将所述时域的参考信号变换到频域以生成频域的参考信号，其中，所述频域的参考信号包括映射到频域资源组上的参考信号序列，所述参考信号序列根据Zadoff-Chu序列和所述参考信号序列的长度确定，所述Zadoff-Chu序列的长度值大于最大可分配的频域资源包含的子载波的个数。
  18. 根据权利要求17所述的方法，其特征在于，所述参考信号序列还根据所述频域资源组在最大可分配的频域资源中的位置确定。
  19. 根据权利要求17或18所述的方法，其特征在于，所述参考信号序列还根据所述频域资源组中相邻的两个子载波的间隔确定。
  20. 根据权利要求17至19任一项所述的方法，其特征在于，所述Zadoff-Chu序列为X q(m)，X q(m)根据
    Figure PCTCN2018071613-appb-100003
    确定；
    其中，j为虚数单位，m为所述Zadoff-Chu序列元素的序号，m为整数且0≤m≤N zc-1，N zc为所述Zadoff-Chu序列的长度值，q为所述ZC序列的根的取值，q与N zc互质。
  21. 根据权利20所述的方法，其特征在于，所述Zadoff-Chu序列长度N zc为21157，所述Zadoff-Chu序列的根q的取值为以下中的一个：1149,1203,1215,1345,1827,1873,1962,2040,2276,2927,2931,3196,3201,3223,3406,3787,5596,6247,6276,6426,7736,7749,7768,8693,8767,8779,8970,9216,9983,9996,11161,11174,11941,12187,12378, 12390,12464,13389,13408,13421,14731,14881,14910,15561,17370,17751,17934,17956,17961,18226,18230,18881,19117,19195,19284,19330,19812,19942,19954,20008。
  22. 根据权利20所述的方法，其特征在于，所述Zadoff-Chu序列长度N zc为131969，所述Zadoff-Chu序列的根q的取值为以下中的一个：2908，5919，8108,9176,11359,12842,13721,18287,19123,21435,22441,25895,27039,30666,36263,38169,40822,42738，44949,51705,54664,59740,61399,67366,68376,70570,78403,82997,86400,95108。
  23. 根据权利22所述的方法，其特征在于，所述频域资源组的带宽大于等于3个资源块RB。
  24. 根据权利20所述的方法，其特征在于，所述Zadoff-Chu序列长度N zc为479971，所述Zadoff-Chu序列的根q的取值为以下中的一个：24335,35852,49443，65019，76272，88558，102028，126841，139505，150710，169872，181751，197023，210577，222328，253191，264402，276530，296245，307534，329261，340466，352513，368238，387393，402362，413569，424829，437224，448552。
  25. 一种通信装置，其特征在于，包括：
    接收单元，用于接收所述时域的参考信号；
    处理单元，用于将时域的参考信号变换到频域以生成频域的参考信号，其中，所述频域的参考信号包括映射到频域资源组上的参考信号序列，所述参考信号序列根据Zadoff-Chu序列和所述参考信号序列的长度确定，所述Zadoff-Chu序列的长度值大于最大可分配的频域资源包含的子载波的个数。
  26. 根据权利要求25所述的通信装置，其特征在于，所述参考信号序列还根据所述频域资源组在最大可分配的频域资源中的位置确定。
  27. 根据权利要求25或26所述的通信装置，其特征在于，所述参考信号序列还根据所述频域资源组中相邻的两个子载波的间隔确定。
  28. 根据权利要求25至27任一项所述的通信装置，其特征在于，所述Zadoff-Chu序列为X q(m)，X q(m)根据
    Figure PCTCN2018071613-appb-100004
    确定；
    其中，j为虚数单位，m为所述Zadoff-Chu序列元素的序号，m为整数且0≤m≤N zc-1，N zc为所述Zadoff-Chu序列的长度值，q为所述ZC序列的根的取值，q与N zc互质。
  29. 根据权利28所述的通信装置，其特征在于，所述Zadoff-Chu序列长度N zc为 21157，所述Zadoff-Chu序列的根q的取值为以下中的一个：1149,1203,1215,1345,1827,1873,1962,2040,2276,2927,2931,3196,3201,3223,3406,3787,5596,6247,6276,6426,7736,7749,7768,8693,8767,8779,8970,9216,9983,9996,11161,11174,11941,12187,12378,12390,12464,13389,13408,13421,14731,14881,14910,15561,17370,17751,17934,17956,17961,18226,18230,18881,19117,19195,19284,19330,19812,19942,19954,20008。
  30. 根据权利28所述的通信装置，其特征在于，所述Zadoff-Chu序列长度N zc为131969，所述Zadoff-Chu序列的根q的取值为以下中的一个：2908，5919，8108,9176,11359,12842,13721,18287,19123,21435,22441,25895,27039,30666,36263,38169,40822,42738，44949,51705,54664,59740,61399,67366,68376,70570,78403,82997,86400,95108。
  31. 根据权利30所述的通信装置，其特征在于，所述频域资源组的带宽大于等于3个资源块RB。
  32. 根据权利28所述的通信装置，其特征在于，所述Zadoff-Chu序列长度N zc为479971，所述Zadoff-Chu序列的根q的取值为以下中的一个：24335,35852,49443，65019，76272，88558，102028，126841，139505，150710，169872，181751，197023，210577，222328，253191，264402，276530，296245，307534，329261，340466，352513，368238，387393，402362，413569，424829，437224，448552。
  33. 一种计算机可读存储介质，用于存储计算机程序或指令，其特征在于，当所述计算机程序或指令在计算机上运行时，使得计算机执行权利要求1至8或17至24任一项所述的方法。
  34. 一种计算机程序产品，其特征在于，当其在计算机上运行时，使得计算机执行权利要求1至8或17至24任一项所述的方法。
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