WO2018059253A1 - 参考信号发送方法、参考信号处理方法及设备 - Google Patents

参考信号发送方法、参考信号处理方法及设备 Download PDF

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Publication number
WO2018059253A1
WO2018059253A1 PCT/CN2017/101969 CN2017101969W WO2018059253A1 WO 2018059253 A1 WO2018059253 A1 WO 2018059253A1 CN 2017101969 W CN2017101969 W CN 2017101969W WO 2018059253 A1 WO2018059253 A1 WO 2018059253A1
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Prior art keywords
sequence
reference signal
transmitter
signal sequence
root index
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PCT/CN2017/101969
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English (en)
French (fr)
Inventor
张旭
曲秉玉
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华为技术有限公司
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Publication of WO2018059253A1 publication Critical patent/WO2018059253A1/zh

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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
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • 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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/0008—Wavelet-division
    • 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
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/0073—Allocation arrangements that take into account other cell interferences

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a reference signal transmitting method, a reference signal processing method, and a device.
  • the UEs in the same cell use the sequences in the same ZC sequence group, and the UEs in different cells use the sequences in different ZC sequence groups, thereby ensuring that the interference of the UEs of different cells transmitting the reference signals on the same time-frequency resource is small.
  • the grouping of the ZC sequence in the LTE system assumes that different cells use the same subcarrier spacing for reference signal transmission, and the time-frequency resources occupied by the UEs of different cells when transmitting the reference signal sequence may include multiple As shown in FIG. 1 , each resource unit occupies one OFDM symbol in the time domain and one subcarrier in the frequency domain, where the subcarrier spacing is 15 kHz.
  • 3GPP has proposed an access network supporting different sub-carrier widths, and the cell can change the sub-carrier width used by it, so that the assumption that different cells use the same sub-carrier width is no longer valid.
  • the cross-correlation between the reference signal sequences is destroyed, and the reference signals transmitted by the UEs of different cells on the same time-frequency resource are interfered, and the access and data transmission performance of the cell are degraded.
  • the embodiments of the present invention provide a reference signal sending method, a reference signal processing method, and a device, which solve the interference problem when different serving cells transmit reference signals on the same time-frequency resource in the prior art.
  • the first reference signal sequence is obtained by extracting a preset generated sequence according to the first subcarrier interval f 1 , and the preset generated sequence includes a Gold sequence or a ZC sequence; or, the first reference The signal sequence is determined by the root index Q of the first reference signal sequence corresponding to the base sequence, and the root index Q is determined by the first subcarrier spacing f 1 .
  • the method for determining the first reference signal sequence may ensure that the first reference signal sequence determined by the transmitter according to the first subcarrier interval has a high correlation with its reference signal sequence in the serving cell. Sex.
  • the transmitter acquires the corresponding reference sequence of the first reference signal sequence from the first correspondence corresponding to the sequence group identifier according to the first subcarrier interval f 1 and the length M of the first reference signal sequence. a root index Q; wherein the first correspondence includes at least a first subcarrier spacing f 1 , a length M of the first reference signal sequence, and a sequence root index corresponding to f 1 and M, the sequence root index being the first reference signal
  • the sequence corresponds to the root index of the base sequence.
  • the transmitter may obtain the root index Q of the corresponding reference sequence of the first reference signal sequence according to the f 1 and M from the first correspondence, so that the first reference signal may be generated according to the acquired root index Q. sequence.
  • the transmitter determines, according to the first subcarrier interval f 1 , the first reference signal sequence corresponding to the first subcarrier interval f 1 , the method further includes: the transmitter Receiving control signaling or high layer signaling sent by the base station, the control signaling or the high layer signaling includes frequency domain resource information of the transmitter sending the reference signal; and the transmitter determines the first subcarrier spacing f 1 according to the frequency domain resource information.
  • the transmitter may determine the first subcarrier spacing f 1 according to control signaling or higher layer signaling sent by the base station.
  • a second aspect there is provided a method of processing a reference signal, the method comprising: a receiver receiving a transmitter on at least one OFDM symbol using the first subcarrier spacing in its serving cell transmits a first sub-carrier spacing f 1 f 1 corresponding to a first reference signal sequence; wherein the first reference signal sequence corresponding to a first sub-carrier spacing f of the transmitter 1 according to a first sub-carrier spacing f 1 is determined.
  • the correlation between the first reference signal sequence and the reference signal sequence in the serving cell of the transmitter is high, and the correlation with the reference signal sequence in other serving cells is low, thereby avoiding the use of different server cells. Interference when transmitting reference signals on the same frequency resource.
  • the method further includes: the receiver determining the second reference signal sequence, and processing the received first reference signal sequence according to the determined second reference signal sequence; wherein the second reference The signal sequence is determined based on the first subcarrier spacing f 1 .
  • the receiver determines the second reference signal sequence according to the first subcarrier interval f 1 , and processes the first reference signal sequence according to the second reference signal sequence, so that the received first reference can be guaranteed. The correctness of the signal sequence.
  • the first reference signal sequence is obtained by extracting a preset generation sequence according to the first subcarrier interval f 1 , and the preset generation sequence includes a Gold sequence or a ZC sequence; or, the first reference signal The sequence is determined by the root index Q of the first reference signal sequence corresponding to the base sequence, and the root index Q is determined by the first subcarrier spacing f 1 .
  • the method for determining the first reference signal sequence may be provided to ensure that the first reference signal sequence determined according to the first subcarrier interval and the reference signal sequence in the serving cell of the transmitter have a higher Correlation.
  • the first reference signal is a sequence, to generate a predetermined sequence in accordance with a first extraction sub-carrier spacing f is obtained, in particular: the interval f 1 and the reference subcarrier according to the first subcarrier
  • the relationship of the interval f 0 is obtained by extracting one preset from the preset generation sequence by 2 n ; wherein, the preset generation sequence is a generation sequence of the reference signal sequence corresponding to the reference
  • the relationship between the root index Q of the corresponding reference sequence of the first reference signal sequence and the reference root index q is determined according to the relationship between the first subcarrier spacing f 1 and the reference subcarrier spacing f 0 , so that The relationship between the two is obtained by extracting a first reference signal sequence from a preset generation sequence.
  • the method further includes: the receiver sending the indication information to the transmitter, so that the transmitter determines the reference root index q according to the indication information.
  • the receiver sending the indication information to the transmitter, so that the transmitter determines the reference root index q according to the indication information.
  • the method further includes: if the receiver is a base station, the method further includes: the base station sends control signaling or high layer signaling to the transmitter, and the control signaling or the high layer signaling includes the transmitter sending the reference.
  • the frequency domain resource information of the signal is such that the transmitter determines the first subcarrier spacing f 1 based on the frequency domain resource information.
  • a transmitter in a third aspect, includes: a determining unit, configured to determine, according to the first subcarrier spacing f 1 , a first reference signal sequence corresponding to the first subcarrier spacing f 1 ; wherein, the first subcarrier The interval f 1 refers to a frequency interval of peaks of two adjacent subcarriers; and a transmitting unit is configured to transmit, in its serving cell, a first reference signal sequence on at least one OFDM symbol using the first subcarrier spacing f 1 .
  • the first reference signal sequence is obtained by extracting a preset generated sequence according to the first subcarrier interval f 1 , and the preset generated sequence includes a Gold sequence or a ZC sequence; or, the first reference The signal sequence is determined by the root index Q of the first reference signal sequence corresponding to the base sequence, and the root index Q is determined by the first subcarrier spacing f 1 .
  • the reference sub-carrier spacing f 0 is for generating a predetermined sequence of 2 n extracts obtained every one extraction; wherein the predetermined sequence is a reference subcarrier generating a reference signal sequence corresponding to the interval f 0 The generated sequence.
  • the determining unit is further configured to: determine a sequence group identifier of the reference signal sequence group used by the serving cell; and determine the reference root index q according to the sequence group identifier.
  • the transmitter further includes: a receiving unit, configured to receive the indication information sent by the receiver, and a determining unit, configured to determine the reference root index q according to the indication information.
  • the determining unit is further configured to obtain the first reference signal from the first correspondence corresponding to the sequence group identifier according to the first subcarrier interval f 1 and the length M of the first reference signal sequence.
  • the sequence corresponds to a root index Q of the base sequence; wherein, the first correspondence includes at least a first subcarrier interval f 1 , a length M of the first reference signal sequence, and a sequence root index corresponding to f 1 and M, and the sequence root index is
  • the first reference signal sequence corresponds to the root index of the base sequence.
  • the receiving unit is further configured to receive control signaling or high layer signaling sent by the base station, where the control signaling or the high layer signaling includes a frequency domain resource that the transmitter sends the reference signal.
  • a determining unit configured to determine, according to the frequency domain resource information, the first subcarrier spacing f 1 .
  • a fourth aspect there is provided a receiver, the receiver comprising: a receiving unit for receiving the transmitter on at least one OFDM symbol using a first sub-carrier spacing f of the first sub-carrier spacing f 1 is transmitted in its serving cell corresponds to a a first reference signal sequence; wherein the first reference signal sequence corresponding to a first sub-carrier spacing f of the transmitter 1 according to a first sub-carrier spacing f 1 is determined.
  • the receiver further includes: a determining unit, configured to determine a second reference signal sequence, and process the received first reference signal sequence according to the determined second reference signal sequence;
  • the second reference signal sequence is determined based on the first subcarrier spacing f 1 .
  • the first reference signal sequence is obtained by extracting a preset generation sequence according to the first subcarrier interval f 1 , and the preset generation sequence includes a Gold sequence or a ZC sequence; or, the first reference signal The sequence is determined by the root index Q of the first reference signal sequence corresponding to the base sequence, and the root index Q is determined by the first subcarrier spacing f 1 .
  • the first reference signal sequence is obtained by extracting a preset generated sequence according to the first subcarrier interval f 1 , specifically: according to the first subcarrier spacing f 1 and the reference subcarrier
  • the relationship of the interval f 0 is obtained by extracting one preset from the preset generation sequence by 2 n ; wherein, the preset generation sequence is a generation sequence of the reference signal sequence corresponding to the reference subcarrier interval
  • the receiver further includes: a sending unit, configured to send the indication information to the transmitter, so that the transmitter determines the reference root index q according to the indication information.
  • the sending unit is further configured to send control signaling or high layer signaling to the transmitter, where the control signaling or the high layer signaling includes a frequency domain resource that the transmitter sends the reference signal.
  • Information such that the transmitter determines the first subcarrier spacing f 1 based on the frequency domain resource information.
  • a transmitter in a fifth aspect, includes a memory, a processor, a system bus, and a communication interface.
  • the memory stores code and data, the processor and the memory are connected through a system bus, and the processor runs the code in the memory to enable the transmitter.
  • the reference signal transmitting method provided by the first aspect or any one of the possible implementation manners of the first aspect is performed.
  • a receiver in a sixth aspect, includes a memory, a processor, a system bus, and a communication interface.
  • the memory stores code and data, the processor and the memory are connected through a system bus, and the processor runs the code in the memory to make the receiver.
  • a seventh aspect a computer readable storage medium having stored therein computer executed instructions for performing the first aspect or the first aspect when at least one processor of a device executes the computer to execute an instruction
  • a computer program product comprising computer executable instructions stored in a computer readable storage medium; at least one processor of the device can read the computer from a computer readable storage medium Executing an instruction, the at least one processor executing the computer to execute the instruction, causing the device to implement the reference signal transmitting method provided by the first aspect or any one of the possible implementation manners of the first aspect, or performing the second aspect or the second aspect A possible implementation implements a reference signal processing method.
  • a communication system comprising the transmitter provided in the above fifth aspect, and the receiver provided in the sixth aspect above.
  • Reference signal transmission method of embodiments of the present invention to provide a reference signal processing method and apparatus, by the first transmitter subcarrier interval f 1, determining a first sequence of a first reference signal sub-carrier spacing f 1 corresponding to, and in accordance with A serving cell transmits a first reference signal sequence on at least one OFDM symbol using a first subcarrier spacing f 1 such that the receiver receives the first reference signal sequence on at least one OFDM symbol such that a reference within the same serving cell
  • the signal sequences have higher correlation, and the reference signal sequences of different serving cells have lower correlation, thereby avoiding interference of transmitting reference signals on the same time-frequency resources of different serving cells.
  • 1 is a schematic diagram of a time-frequency resource for transmitting a reference signal
  • FIG. 2 is a schematic structural diagram of a communication system according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a base station according to an embodiment of the present disclosure.
  • FIG. 4 is a schematic structural diagram of a baseband subsystem according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a user equipment according to an embodiment of the present disclosure.
  • FIG. 6 is a flowchart of a method for sending a reference signal according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of a reference signal sequence according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of a time-frequency resource according to an embodiment of the present invention.
  • FIG. 9 is a flowchart of another method for transmitting a reference signal according to an embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of a transmitter according to an embodiment of the present disclosure.
  • FIG. 11 is a schematic structural diagram of another transmitter according to an embodiment of the present disclosure.
  • FIG. 12 is a schematic structural diagram of still another transmitter according to an embodiment of the present disclosure.
  • FIG. 13 is a schematic structural diagram of a receiver according to an embodiment of the present disclosure.
  • FIG. 14 is a schematic structural diagram of another receiver according to an embodiment of the present disclosure.
  • FIG. 15 is a schematic structural diagram of still another receiver according to an embodiment of the present invention.
  • the reference signal refers to a signal used for measuring channel quality or for coherent detection and data demodulation of a UE.
  • the reference signal may mainly include: a demodulation reference signal (English: demodulation reference signal, hereinafter referred to as DMRS), a channel sounding reference signal (English: sounding reference signal, referred to as SRS), and a random access channel (English: random access channel) , referred to as: RACH) preamble.
  • DMRS demodulation reference signal
  • SRS sounding reference signal
  • RACH random access channel preamble
  • a base sequence refers to a sequence that generates a reference signal sequence
  • the reference signal sequence is a sequence generated by phase rotation of the base sequence in the frequency domain.
  • a cyclically extended ZC sequence is phase rotated in the frequency domain to generate a reference signal sequence.
  • the cyclically extended ZC sequence can be referred to as a base sequence corresponding to the reference signal sequence.
  • the root index of the base sequence refers to the root index used to generate the base sequence. Taking the ZC sequence as the base sequence, if the root index is q 1, the generated is based on the formula (1) of the root index q 1 and the ZC sequence. The sequence is called the ZC sequence, and the root index is the root index of the generated ZC sequence.
  • N ZC is the length of the ZC sequence, and m is from 0 to N ZC -1;
  • the generated sequence refers to a sequence that generates a base sequence, and the base sequence is a sequence generated by cyclically expanding or truncating the generated sequence.
  • the generated sequence may include a Gold sequence and a ZC sequence. If the generated sequence is a Gold sequence, the reference signal sequence may be generated by a truncated sequence of the Gold sequence; or the generated sequence is a ZC sequence, and the reference signal sequence is cyclically expanded by the ZC sequence, and then the phase rotation is added to the expanded sequence to generate Said q 1 is an indicator of the ZC sequence.
  • the communication system includes a base station 101 and a user equipment 102.
  • the transmitter is the user equipment 102
  • the receiver is the base station 101; if the transmitter is the base station 101, the receiver is the user equipment 102.
  • the base station 101 has a scheduling function of a shared channel, and has a function of establishing a scheduling based on a history of packet data sent to the user equipment 102.
  • the scheduling is that when a plurality of user equipments 102 share transmission resources, a mechanism is needed to effectively allocate. Physical layer resources to obtain statistical multiplexing gain.
  • the multiple user equipments 102 may be located in the serving cell of the base station 101.
  • the serving cell of the base station 101 may include one or more. For example, as shown in FIG. 2, the serving cell of the base station 101 may be two, that is, Cell 1 and Cell 2.
  • the user equipment 102 has a function of transmitting and receiving data through a communication channel 103 established with the base station 101.
  • the user equipment 102 performs transmission or reception processing of the shared channel based on the information transmitted through the scheduling control channel.
  • the user equipment 102 may be a mobile station, a mobile phone, a computer, a portable terminal, etc., and the types of the user equipment 102 may be the same or different.
  • the base station 101 and the user equipment 102 perform data reception and transmission through a communication channel, which may be a wireless communication channel, and in the wireless communication channel, at least a shared channel and a scheduling control channel exist, and the shared channel is for transmitting and receiving.
  • the packet is shared among the plurality of user equipments 102, and the scheduling control channel is used to transmit the allocation of the shared channel, the corresponding scheduling result, and the like.
  • the base station includes a baseband subsystem, a medium-frequency subsystem, an antenna feeder subsystem, and some supporting structures (for example, a whole subsystem).
  • the baseband subsystem is used to implement operation and maintenance of the entire base station, implement signaling processing, radio resource principle, and transmission interface to the packet core network, and implement LTE physical layer, medium access control layer, L3 signaling, operation and maintenance master Control function;
  • the middle RF subsystem realizes conversion between baseband signal, intermediate frequency signal and radio frequency signal, realizes demodulation of LTE wireless receiving signal and modulation and power amplification of transmitting signal;
  • antenna feeder subsystem includes antenna connected to base station radio frequency module The feeder and the feeder and the feeder and the feeder of the GRS receiving card are used for receiving and transmitting the wireless air interface signal;
  • the whole subsystem is a supporting part of the baseband subsystem and the intermediate frequency subsystem, and provides structural, power supply and environmental monitoring functions.
  • the baseband subsystem can be as shown in FIG. 4: for example, the mobile phone Internet access needs to access the core network through the base station, and accesses the Internet through the core network, wherein the data of the Internet is transmitted to the baseband part through the interface between the core network and the base station.
  • the baseband part performs PDCP, RLC, MAC layer, coding, modulation, etc., and delivers to the radio frequency part for transmission to the user equipment.
  • the baseband and the radio frequency can be connected through the CPRI interface; in addition, the radio frequency part can be pulled far by the optical fiber, for example, the remote RRU.
  • the baseband of each step of the data transmission method in the embodiment of the present invention is implemented by radio frequency, and the receiving and transmitting step is implemented by an antenna (for example, an air interface).
  • An interface between a user equipment and a base station involved in the implementation of the present invention may be understood as a user equipment and a base station.
  • FIG. 5 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.
  • the user equipment may be a mobile phone, a tablet computer, a notebook computer, a super mobile personal computer, a netbook, a personal digital assistant, etc.
  • FIG. 4 is a block diagram showing a part of the structure of a mobile phone related to each embodiment of the present invention.
  • the mobile phone includes: a memory, a processor, a radio frequency (RF) circuit, and a power supply.
  • RF radio frequency
  • the memory can be used to store software programs and modules, and the processor executes various functional applications and data processing of the mobile phone by running software programs and modules stored in the memory.
  • the memory may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application required for at least one function, and the like; the storage data area may store data created according to usage of the mobile phone, and the like.
  • the memory may include a high speed random access memory, and may also include a nonvolatile memory or the like.
  • the processor is the control center of the mobile phone, and connects various parts of the entire mobile phone by using various interfaces and lines, and executes each mobile phone by running or executing software programs and/or modules stored in the memory, and calling data stored in the memory.
  • the processor may include one or more processing units; preferably, the processor may integrate an application processor and a modem processor, where the application processor mainly processes an operating system, a user interface, an application, etc., and modulates
  • the demodulation processor primarily handles wireless communications.
  • the RF circuit can be used to send and receive information or receive and transmit signals during a call.
  • RF circuits include, but are not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.
  • the RF circuit can communicate with the network and other devices through wireless communication.
  • the wireless communication can use any communication standard or protocol, including but not limited to global mobile communication systems, general packet radio services, code division multiple access, wideband code division multiple access, long term evolution, email, short message service, and the like.
  • the mobile phone also includes a power source for powering various components.
  • the power source can be connected to the processor logic through the power management system to manage functions such as charging, discharging, and power management through the power management system.
  • the mobile phone may further include an input unit, a display unit, a sensor module, an audio module, a WiFi module, a Bluetooth module, and the like, and details are not described herein.
  • FIG. 6 is a schematic flowchart of a method for sending a reference signal according to an embodiment of the present invention. Referring to FIG. 6, the method includes the following steps.
  • Step 201 The transmitter determines, according to the first subcarrier interval f 1 , a first reference signal sequence corresponding to the first subcarrier interval f 1 ; wherein the first subcarrier interval f 1 refers to a frequency interval of peaks of two adjacent subcarriers .
  • the first reference signal sequence may be obtained by extracting a preset generated sequence according to the first subcarrier interval f 1 , and the preset generated sequence includes a Gold sequence or a ZC sequence; or the first reference signal sequence is determined by the first reference.
  • the signal sequence is determined by the root index Q of the base sequence, and the root index Q is determined by the first subcarrier interval f 1 , wherein the Q is an indicator of the ZC sequence.
  • the first type of the first reference signal sequence is obtained by extracting a preset generated sequence according to the first subcarrier interval f 1 , and the preset generated sequence includes a Gold sequence or a ZC sequence.
  • a first determining a first reference signal sequence corresponding to sub-carrier spacing f 1 according to a first transmitter may first sub-carrier spacing f 1, determined from a preset generating Extracting the extraction interval of the first reference signal sequence in the sequence, and extracting the preset generation sequence according to the determined extraction interval, thereby obtaining the first reference signal sequence.
  • the transmitter when the transmitter determines, according to the first subcarrier interval f 1 , that the extraction interval of the first reference signal sequence is extracted from the preset generation sequence, the transmitter may be between the preset subcarrier interval and the extraction interval.
  • the extraction interval corresponding to the first subcarrier interval f 1 is obtained, and the obtained extraction interval is determined as the extraction interval of extracting the first reference signal sequence from the preset generation sequence.
  • the subcarrier spacing f 1 determines that the decimation interval of the first reference signal sequence is extracted from the preset generation sequence, and the transmitter may determine 2 n according to the relationship between the first subcarrier spacing f 1 and the reference subcarrier spacing f 0 .
  • the preset generation sequence may be a sequence of generation of the reference signal sequence corresponding to the reference subcarrier interval f 0 .
  • the transmitter extracts every two of the cyclic extension sequences of the generated sequences zc0 to zc10 according to the determined extraction interval, and the base sequence of the obtained first reference signal sequence is as shown in (b) of FIG. Specifically, zc(0), zc(2), zc(4), zc(6), zc(8), zc(10), zc(1), zc(3), zc(5), zc( 7), zc(9), zc(0).
  • zc(1), zc(3), zc(5), zc(7), zc(9), zc(0) included in the first reference signal sequence base sequence are pairs of generating sequence zc(0) ⁇ Zc(10) Sequence code extracted every 2 times after cyclic expansion.
  • the second, first reference signal sequence is determined by the root index Q of the first reference signal sequence corresponding base sequence, and the root index Q is determined by the first subcarrier interval f 1 .
  • the method for the transmitter to determine the first reference signal sequence may include: step a-step c.
  • Step a determining a root index Q of the base sequence corresponding to the first reference signal sequence according to the first subcarrier interval f 1 .
  • the transmitter may lengths M f 1 and the first reference signal sequence in accordance with a first interval of subcarriers Obtaining, from the first correspondence corresponding to the sequence group identifier, a root index Q of the base sequence corresponding to the first reference signal sequence, where the first correspondence includes at least a first subcarrier interval f 1 and a length of the first reference signal sequence M, and a sequence root index corresponding to f 1 and M, the sequence root index is a root index of the base sequence corresponding to the first reference signal sequence.
  • the root index Q of the corresponding base sequence of the first reference signal sequence is obtained as 4.
  • the interval in the first correspondence relationship shown in the foregoing Table 1 refers to a preset subcarrier spacing
  • the length refers to the length of the preset reference signal sequence
  • the first correspondence relationship shown in Table 1 above does not limit the embodiment of the present invention.
  • the transmitter may first determine the reference root index q, and then combine the first subcarrier interval f 1 with The root index Q is determined with reference to the relationship of the subcarrier spacing f 0 .
  • the transmitter when the transmitter determines the reference root index q, the transmitter may determine the sequence group identifier of the reference signal sequence group used by the serving cell, and determine the reference root index q according to the sequence group identifier.
  • the process of determining, by the transmitter, the sequence group identifier may be: the transmitter receives synchronization information, where the synchronization information includes a cell identifier of the serving cell, and the transmitter according to the cell identifier and the total number of reference signal sequence groups included in the communication system. , determine the sequence group identifier.
  • the transmitter may determine the remainder of the group number of the sequence group relative to the total number of reference signal sequence groups included in the communication system as the reference root index q.
  • a communication system may include multiple reference signal sequence groups, and one reference signal sequence group may include multiple reference signal sequences, and the cross-correlation between the reference signal sequences in the same group is higher, different.
  • the cross-correlation between the reference signal sequences within the group is low.
  • the total number of reference signal sequence groups can be 30.
  • the transmitter may also receive the indication information sent by the receiver, and determine the reference root index q according to the indication information.
  • the transmitter may save the indication according to the received indication information.
  • the preset reference root index corresponding to the indication information is obtained, and the obtained preset reference root index is determined as the reference root index q.
  • the preset reference root index corresponding to the information 1 is obtained from the correspondence between the preset indication information and the preset reference root index as shown in Table 2 below. 1, the index 1 is determined as the reference root index q.
  • Preset indication Preset reference root index Information 0 Index 0 Information 1 Index 1 Information 2 Index 2 ; whereas ;
  • the indication information sent by the receiver may be included in the system information, and the system information may be sent to the transmitter by means of a broadcast.
  • the transmitter when the transmitter generates the base sequence corresponding to the first reference signal sequence according to the root index Q of the corresponding reference sequence of the first reference signal sequence, if the first reference signal sequence corresponds to the base sequence as the ZC sequence, the transmitter may be based on The root index Q generates a base sequence corresponding to the first reference signal sequence according to the following formula (2); in the formula (2), N ZC is the length of the ZC sequence, and M is the length of the first reference signal sequence, and x q [] is Referring to the ZC sequence corresponding to the root index q, mod is the remainder symbol. or,
  • the transmitter If the first reference signal sequence corresponds to the base sequence as a Gold sequence, the transmitter generates a first reference signal sequence corresponding to the relationship between the root index Q of the base sequence and the reference root index q in the first reference signal sequence according to the following formula (3).
  • L is the length of the Gold sequence
  • M is the length of the first reference signal sequence
  • y[] is the initial Gold sequence.
  • Step c The transmitter generates a first reference signal sequence according to the base sequence corresponding to the first reference signal sequence.
  • Step 202 The transmitter transmits a first reference signal sequence to the receiver on the serving cell using the first subcarrier spacing f 1 on the at least one OFDM symbol.
  • Step 203 a transmitter using a first receiver for receiving a first reference signal sequence subcarrier f 1 is transmitted in its serving cell interval on at least one OFDM symbol.
  • the transmitter may send the first reference signal sequence on the serving cell using the first subcarrier interval f 1 on the at least one OFDM symbol.
  • the receiver can receive the first reference signal sequence transmitted by the transmitter using the first subcarrier spacing f 1 on at least one OFDM symbol.
  • the serving cell is configured with at least two subcarrier spacings, for example, the number of the at least two subcarrier spacings is 2, and the first subcarrier spacing f 1 and the second subcarrier spacing f 2 are respectively transmitted.
  • machine using the first sub-carrier spacing f 1, and / or the second sub-carrier spacing f 2 transmits a reference signal sequence
  • using the first sub-1, and / or the second sub-carrier spacing f 2 transmits data carrier spacing f
  • the reference signal sequence and the subcarrier spacing used when transmitting the data are different
  • the transmitter may transmit the reference signal sequence and the data by using the corresponding subcarrier spacing in a time division multiplexing manner, specifically, the time domain resource and the transmission of the reference signal sequence.
  • the time domain resources of the data are different.
  • a transmitter using a first sub-carrier spacing f 1 transmits a reference signal sequence
  • 8 2 transmits data using a second sub-carrier spacing f
  • the time-frequency resources can be as shown in Figure 8.
  • the base sequence group corresponding to the reference signal sequence group used by the serving cell includes at least a base sequence for one reference signal sequence length.
  • Step 204 The receiver determines a second reference signal sequence, and processes the received first reference signal sequence according to the determined second reference signal sequence; wherein the second reference signal sequence is according to the first subcarrier interval f 1 definite.
  • the method for determining the second reference signal sequence by the receiver according to the first subcarrier spacing f 1 is consistent with the method for determining the first reference signal sequence according to the first subcarrier spacing f 1 in the foregoing step 201.
  • the description of the embodiments of the present invention is not described herein again.
  • the received first reference signal sequence may be processed according to the second reference signal sequence, where the specific process is: determining the received first reference signal and the receiver.
  • the second reference signal sequence performs correlation processing, and the processing method multiplies and corresponds to each corresponding element in the two sequences.
  • the base station when the reference signal sending method provided by the embodiment of the present invention is applied between the base station and the user equipment, in the foregoing steps 201-204, when the user equipment acts as a transmitter, the base station can serve as a receiver; or When the user equipment acts as a receiver, the base station can act as a transmitter.
  • the transmitter or the receiver may also be other devices, which is not specifically limited in this embodiment of the present invention.
  • the method further includes: Step 205-Step 206.
  • Step 205 The base station sends control signaling or high layer signaling to the transmitter, where the control signaling or the high layer signaling includes frequency domain resource information of the transmitter sending the reference signal.
  • Step 206 When the transmitter receives the control signaling or the high layer signaling, the transmitter may determine the frequency domain resource information of the sending reference signal according to the control signaling or the high layer signaling.
  • the transmitter may determine the frequency domain resource information of the sending reference signal according to the received control signaling or the high layer signaling.
  • the transmitter may determine, according to the control signaling or the high layer signaling, a first subcarrier interval f 1 and at least one OFDM symbol for transmitting the reference signal.
  • Embodiment of the present invention is provided with reference signal transmission method, a transmitter via a first sub-carrier spacing f 1, determining a first sequence of a first reference signal sub-carrier spacing f 1 corresponding to the first subcarrier and used in accordance with its serving cell
  • the interval f 1 transmits the first reference signal sequence on the at least one OFDM symbol, so that the receiver receives the first reference signal sequence on the at least one OFDM symbol, so that the reference signal sequence in the same serving cell has a higher correlation
  • the reference signal sequences of different serving cells have lower correlation, thereby avoiding interference of transmitting reference signals on the same time-frequency resources of different serving cells.
  • each network element such as a transmitter, a receiver, etc.
  • each network element includes hardware structures and/or software modules corresponding to each function.
  • the present invention can be implemented in a combination of hardware or hardware and computer software in conjunction with the network elements and algorithm 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 for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.
  • FIG. 10 is a schematic diagram showing a possible structure of a transmitter involved in the foregoing embodiment.
  • the transmitter 300 includes a determining unit 301 and a sending unit 302.
  • the determining unit 301 is configured to execute the process 201 in FIG. 6, the processes 201 and 206 in FIG. 9, and the sending unit 302 is configured to execute the process 202 in FIG. 6 and FIG.
  • the transmitter may further include a receiving unit 303, where the receiving unit 303 is configured to receive control signaling or higher layer signaling sent by the receiver. All the related content of the steps involved in the foregoing method embodiments may be referred to the functional description of the corresponding functional modules, and details are not described herein again.
  • FIG. 11 shows a possible logical structure diagram of the transmitter 310 involved in the above embodiment.
  • the transmitter 310 includes a processing module 312 and a communication module 313.
  • the processing module 312 is configured to control manage the actions of the transmitter, for example, the processing module 312 is configured to perform the process 201 of FIG. 6, and the processes 201 and 206 of FIG. 9, and/or for the techniques described herein. Other processes.
  • Communication module 313 is used for communication with the receiver.
  • the transmitter 310 can also include a storage module 311 for storing program codes and data of the transmitter.
  • the processing module 312 can be a processor or a controller, such as a central processing unit, a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a transistor logic device, Hardware components or any combination thereof. It can be implemented or executed in conjunction with the present invention Various exemplary logical blocks, modules and circuits are described in the disclosure.
  • the processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, combinations of digital signal processors and microprocessors, and the like.
  • the communication module 313 can be a transceiver, a transceiver circuit, a communication interface, or the like.
  • the storage module 311 can be a memory.
  • the transmitter 320 includes a processor 322, a communication interface 323, a memory 321, and a bus 324.
  • the communication interface 323, the processor 322, and the memory 321 are connected to each other through a bus 324.
  • the bus 324 may be a peripheral component interconnect standard (English: peripheral component interconnect, PCI for short) or an extended industry standard structure (English: extended industry) Standard architecture, referred to as: EISA) bus.
  • the bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 12, but it does not mean that there is only one bus or one type of bus.
  • FIG. 13 is a schematic diagram showing a possible structure of a receiver involved in the foregoing embodiment.
  • the receiver 400 includes a receiving unit 401 and a determining unit 402.
  • the receiving unit 401 is configured to perform the process 203 in FIGS. 6 and 9; the determining unit 402 is configured to perform the process 204 in FIGS. 6 and 9.
  • the receiver may further include a sending unit 403, where the sending unit 403 is configured to perform the process 205 of transmitting control signaling or higher layer signaling to the transmitter in FIG. All the related content of the steps involved in the foregoing method embodiments may be referred to the functional description of the corresponding functional modules, and details are not described herein again.
  • FIG. 14 shows a possible logical structure diagram of the receiver 410 involved in the above embodiment.
  • the receiver 410 includes a processing module 412 and a communication module 413.
  • Processing module 412 is used to control management of the actions of the receiver, for example, processing module 412 is used to perform process 204 in Figures 6 and 9, and/or other processes for the techniques described herein.
  • Communication module 413 is used for communication with the receiver.
  • the transmitter 410 can also include a storage module 411 for storing program codes and data of the receiver.
  • the processing module 412 can be a processor or a controller, such as a central processing unit, a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a transistor logic device, Hardware components or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure.
  • the processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, combinations of digital signal processors and microprocessors, and the like.
  • the communication module 413 can be a transceiver, a transceiver circuit, a communication interface, or the like.
  • the storage module 411 can be a memory.
  • the receiver When the processing module 412 is a processor, the communication module 413 is a communication interface, and the storage module 411 is a memory, the receiver according to the embodiment of the present invention may be the device shown in FIG.
  • an example of a hardware configuration of a receiver includes a processor 422, a communication interface 423, a memory 421, and a bus 424.
  • the communication interface 423, the processor 422, and the memory 421 are connected to each other through a bus 424.
  • the bus 424 may be a PCI bus or an EISA bus.
  • the bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only use Figure 15 A thick line indicates, but does not mean that there is only one bus or one type of bus.
  • a computer readable storage medium is stored, where computer executed instructions are stored, and when at least one processor of the device executes the computer to execute an instruction, the device performs the above The steps of the transmitter in the reference signal transmitting method provided in FIG. 6 or FIG. 9, or the steps of the receiver in the reference signal transmitting method provided in FIG. 6 or FIG. 9 described above.
  • a computer program product comprising computer executable instructions stored in a computer readable storage medium; at least one processor of the device may be Reading the storage medium to read the computer to execute the instruction, the at least one processor executing the computer to execute the instruction, causing the device to implement the steps of the transmitter in the reference signal transmitting method provided in FIG. 6 or FIG. 9 above, or implementing the above FIG. 6 or FIG. The steps of the receiver in the provided reference signal transmission method.
  • a communication system comprising the transmitter shown in any of the above Figures 10-12, and the receiver shown in any of Figures 13-15;
  • the transmitter is configured to perform the steps of the transmitter in the reference signal transmitting method provided in FIG. 6 or FIG. 9, and the receiver is configured to perform the step of transmitting the receiver in the reference signal transmitting method provided in FIG. 6 or FIG.
  • the communication system by a transmitter according to a first sub-carrier spacing f 1, a first determining a first reference signal sequence corresponding to sub-carrier spacing f. 1, and using the first sub-carrier spacing f of its serving cell 1 transmitting a first reference signal sequence on at least one OFDM symbol, causing the receiver to receive the first reference signal sequence on at least one OFDM symbol, such that the reference signal sequence in the same serving cell has a higher correlation, different
  • the reference signal sequence of the serving cell has a lower correlation, thereby avoiding interference of transmitting reference signals on the same time-frequency resource of different serving cells.

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Abstract

本发明实施例提供的参考信号发送方法、参考信号处理方法及设备，涉及通信技术领域，解决了现有技术中不同服务小区在相同时频资源上发送参考信号时存在干扰的问题。该方法包括：发射机根据第一子载波间隔f1，确定所述第一子载波间隔f1对应的第一参考信号序列；其中，第一子载波间隔f1是指相邻两个子载波峰值的频率间隔；所述发射机在其服务小区使用所述第一子载波间隔f1在至少一个OFDM符号上发送所述第一参考信号序列，从而接收机在至少一个OFDM符号上接收发射机在其服务小区使用所述第一子载波间隔f1发送的第一参考信号序列。

Description

参考信号发送方法、参考信号处理方法及设备
本申请要求于2016年09月29日提交中国专利局、申请号为201610871841.9、申请名称为“参考信号发送方法、参考信号处理方法及设备”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
本发明涉及通信技术领域，尤其涉及参考信号发送方法、参考信号处理方法及设备。
背景技术
参考信号用于数据的解调和信道探测，参考信号序列的设计需尽量减小不同小区的用户设备(英文：user equipment，简称：UE)在相同时频资源上发送参考信号的干扰。目前，在长期演进(英文：long term evolution，简称：LTE)系统中，上行参考信号使用Zadoff-Chu(ZC)序列，根据序列间的互相关性，将多个ZC序列进行分组，保证组内的ZC序列间具有较高互相关性，而与其他组内的ZC序列间具有较低的互相关性。同一小区的UE使用同一ZC序列组内的序列，不同小区的UE使用于不同ZC序列组内的序列，从而保证了不同小区的UE在相同时频资源上发送参考信号的干扰很小。
其中，LTE系统中对ZC序列进行的分组时，是假设不同小区使用相同的子载波间隔进行参考信号发送的，且不同小区的UE在发送参考信号序列时，所占用的时频资源可以包括多个资源单元，如图1所示，每个资源单元在时域上占用一个OFDM符号，在频域上占用一个子载波，其中子载波间隔为15kHz。但是，随着通信技术的快速发展，3GPP已经提出了支持不同子载波宽度的接入网络，且小区可以改变其使用的子载波宽度，从而导致不同小区使用相同子载波宽度的假设不再成立，致使参考信号序列间的互相关性被破坏，进而导致不同小区的UE在相同时频资源上发送的参考信号存在干扰，小区的接入和数据传输性能下降。
发明内容
本发明的实施例提供参考信号发送方法、参考信号处理方法及设备，解决了现有技术中不同服务小区在相同时频资源上发送参考信号时的干扰问题。
为达到上述目的，本发明的实施例采用如下技术方案：
第一方面，提供一种参考信号发送方法，该方法包括：发射机根据第一子载波间隔f1，确定第一子载波间隔f1对应的第一参考信号序列；其中，第一子载波间隔f1是指相邻两个子载波峰值的频率间隔；发射机在其服务小区使用第一子载波间隔f1在至少一个OFDM符号上发送第一参考信号序列。上述技术方案中，可以使发射机根据使用的第一子载波间隔确定第一参考信号序列，且第一参考信号序列与其服务小区内的其参考信号序列的相关性较高，与其他服务小区内参考信号序列的相关性较低，从而 避免了不同服务器小区使用相同时频资源上发送参考信号时的干扰。
在一种可能的实现方式中，第一参考信号序列是根据第一子载波间隔f1，对预设的生成序列抽取获得，预设的生成序列包括Gold序列或ZC序列；或者，第一参考信号序列由第一参考信号序列对应基序列的根索引Q确定，根索引Q由第一子载波间隔f1确定。上述可选的技术方案中，提供的确定第一参考信号序列的方法，可以保证发射机根据第一子载波间隔确定的第一参考信号序列与其服务小区内的其参考信号序列具有较高的相关性。
在一种可能的实现方式中，若第一子载波间隔f1与参考子载波间隔f0的关系为：f1＝f0*2n，n为大于等于0的整数，则第一参考信号序列对应基序列的根索引Q与参考根索引q存在如下关系：Q＝q(2n)2；其中，参考根索引q为参考基序列的根索引，参考基序列是指参考子载波间隔f0对应的参考信号序列对应的基序列；第一子载波间隔f1对应的第一参考信号序列是根据第一子载波间隔f1，对预设的生成序列抽取获得，具体为：根据第一子载波间隔f1与参考子载波间隔f0的关系，对预设的生成序列每隔2n个抽取一个抽取获得；其中，预设的生成序列为参考子载波间隔f0对应的参考信号序列的生成序列。上述可选的技术方案中，可以使发射机根据第一子载波间隔f1与参考子载波间隔f0的关系，确定第一参考信号序列对应基序列的根索引Q与参考根索引q的关系，从而可以根据二者的关系，从预设的生成序列中抽取获得第一参考信号序列。
在一种可能的实现方式中，发射机确定服务小区所使用的参考信号序列组的序列组标识；发射机根据序列组标识，确定参考根索引q。上述可选的技术方案中，提供了一种确定参考根索引q的方法。
在一种可能的实现方式中，该方法还包括：发射机接收接收机发送的指示信息，并根据指示信息，确定参考根索引q。上述可选的技术方案中，提供了另一种确定参考根索引q的方法。
在一种可能的实现方式中，发射机根据第一子载波间隔f1和第一参考信号序列的长度M，从序列组标识对应的第一对应关系中，获取第一参考信号序列对应基序列的根索引Q；其中，第一对应关系至少包括第一子载波间隔f1、第一参考信号序列的长度M、以及与f1和M对应的序列根索引，序列根索引为第一参考信号序列对应基序列的根索引。上述可选的技术方案中，发射机可以从第一对应关系中根据f1和M，获取第一参考信号序列对应基序列的根索引Q，从而可以根据获取的根索引Q生成第一参考信号序列。
在一种可能的实现方式中，若接收机为基站，发射机根据第一子载波间隔f1，确定第一子载波间隔f1对应的第一参考信号序列之前，该方法还包括：发射机接收基站发送的控制信令或者高层信令，控制信令或者高层信令包含发射机发送参考信号的频域资源信息；发射机根据频域资源信息，确定第一子载波间隔f1。上述可选的技术方案中，发射机可以根据基站发送的控制信令或者高层信令确定第一子载波间隔f1。
第二方面，提供一种参考信号处理方法，该方法包括：接收机在至少一个OFDM符号上接收发射机在其服务小区使用第一子载波间隔f1发送的第一子载波间隔f1对 应的第一参考信号序列；其中，第一子载波间隔f1对应的第一参考信号序列由发射机根据第一子载波间隔f1进行确定。上述技术方案中，第一参考信号序列与发射机的服务小区内的其参考信号序列的相关性较高，与其他服务小区内参考信号序列的相关性较低，从而可以避免不同服务器小区使用相同时频资源上发送参考信号时的干扰。
在一种可能的实现方式中，该方法还包括：接收机确定第二参考信号序列，并根据确定的第二参考信号序列，对接收到的第一参考信号序列进行处理；其中，第二参考信号序列是根据第一子载波间隔f1确定的。上述可选的技术方案中，接收机根据第一子载波间隔f1确定第二参考信号序列，并根据第二参考信号序列对第一参考信号序列进行处理，从而可以保证接收到的第一参考信号序列的正确性。
在一种可能的实现方式中，第一参考信号序列根据第一子载波间隔f1，对预设的生成序列抽取获得，预设的生成序列包括Gold序列或ZC序列；或者，第一参考信号序列由第一参考信号序列对应基序列的根索引Q确定，根索引Q由第一子载波间隔f1确定。上述可选的技术方案中，提供的确定第一参考信号序列的方法，可以保证根据第一子载波间隔确定的第一参考信号序列与发射机的服务小区内的其参考信号序列具有较高的相关性。
在一种可能的实现方式中，若第一子载波间隔f1与参考子载波间隔f0的关系为：f1＝f0*2n，n为大于等于0的整数，则第一参考信号序列对应基序列的根索引Q与参考根索引q存在如下关系：Q＝q(2n)2；其中，参考根索引q为参考基序列的根索引，参考基序列是指参考子载波间隔f0对应的参考信号序列对应的基序列；第一参考信号序列是根据第一子载波间隔f1，对预设的生成序列抽取获得，具体为：根据第一子载波间隔f1与参考子载波间隔f0的关系，对预设的生成序列每隔2n个抽取一个抽取获得；其中，预设的生成序列为参考子载波间隔f0对应的参考信号序列的生成序列。上述可选的技术方案中，根据第一子载波间隔f1与参考子载波间隔f0的关系，确定第一参考信号序列对应基序列的根索引Q与参考根索引q的关系，从而可以根据二者的关系，从预设的生成序列中抽取获得第一参考信号序列。
在一种可能的实现方式中，该方法还包括：接收机向发射机发送指示信息，以使发射机根据指示信息，确定参考根索引q。上述可选的技术方案中，提供了一种确定参考根索引q的方法。
在一种可能的实现方式中，该方法还包括：若接收机为基站，该方法还包括：基站向发射机发送控制信令或者高层信令，控制信令或者高层信令包含发射机发送参考信号的频域资源信息，以使发射机根据频域资源信息，确定第一子载波间隔f1。上述可选的技术方案中，提供了另一种确定参考根索引q的方法。
第三方面，提供一种发射机，发射机包括：确定单元，用于根据第一子载波间隔f1，确定第一子载波间隔f1对应的第一参考信号序列；其中，第一子载波间隔f1是指相邻两个子载波峰值的频率间隔；发送单元，用于在其服务小区使用第一子载波间隔f1在至少一个OFDM符号上发送第一参考信号序列。
在一种可能的实现方式中，第一参考信号序列是根据第一子载波间隔f1，对预设的生成序列抽取获得，预设的生成序列包括Gold序列或ZC序列；或者，第一参考信 号序列由第一参考信号序列对应基序列的根索引Q确定，根索引Q由第一子载波间隔f1确定。
在一种可能的实现方式中，若第一子载波间隔f1与参考子载波间隔f0的关系为：f1＝f0*2n，n为大于等于0的整数，则第一参考信号序列对应基序列的根索引Q与参考根索引q存在如下关系：Q＝q(2n)2；其中，参考根索引q为参考基序列的根索引，参考基序列是指参考子载波间隔f0对应的参考信号序列对应的基序列；第一子载波间隔f1对应的第一参考信号序列是根据第一子载波间隔f1，对预设的生成序列抽取获得，具体为：根据第一子载波间隔f1与参考子载波间隔f0的关系，对预设的生成序列每隔2n个抽取一个抽取获得；其中，预设的生成序列为参考子载波间隔f0对应的参考信号序列的生成序列。
在一种可能的实现方式中，确定单元还用于：确定服务小区所使用的参考信号序列组的序列组标识；根据序列组标识，确定参考根索引q。
在一种可能的实现方式中，发射机还包括：接收单元，用于接收接收机发送的指示信息；确定单元，还用于根据指示信息，确定参考根索引q。
在一种可能的实现方式中，确定单元，还用于根据第一子载波间隔f1和第一参考信号序列的长度M，从序列组标识对应的第一对应关系中，获取第一参考信号序列对应基序列的根索引Q；其中，第一对应关系至少包括第一子载波间隔f1、第一参考信号序列的长度M、以及与f1和M对应的序列根索引，序列根索引为第一参考信号序列对应基序列的根索引。
在一种可能的实现方式中，若接收机为基站，接收单元，还用于接收基站发送的控制信令或者高层信令，控制信令或者高层信令包含发射机发送参考信号的频域资源信息；确定单元，还用于根据频域资源信息，确定第一子载波间隔f1。
第四方面，提供一种接收机，接收机包括：接收单元，用于在至少一个OFDM符号上接收发射机在其服务小区使用第一子载波间隔f1发送的第一子载波间隔f1对应的第一参考信号序列；其中，第一子载波间隔f1对应的第一参考信号序列由发射机根据第一子载波间隔f1进行确定。
在一种可能的实现方式中，接收机还包括：确定单元，用于确定第二参考信号序列，并根据确定的第二参考信号序列，对接收到的第一参考信号序列进行处理；其中，第二参考信号序列是根据第一子载波间隔f1确定的。
在一种可能的实现方式中，第一参考信号序列根据第一子载波间隔f1，对预设的生成序列抽取获得，预设的生成序列包括Gold序列或ZC序列；或者，第一参考信号序列由第一参考信号序列对应基序列的根索引Q确定，根索引Q由第一子载波间隔f1确定。
在一种可能的实现方式中，若第一子载波间隔f1与参考子载波间隔f0的关系为：f1＝f0*2n，n为大于等于0的整数，则第一参考信号序列对应基序列的根索引Q与参考根索引q存在如下关系：Q＝q(2n)2；其中，参考根索引q为参考基序列的根索引，参考基序列是指参考子载波间隔f0对应的参考信号序列对应的基序列；第一参考信号序列是根据第一子载波间隔f1，对预设的生成序列抽取获得，具体为：根据第一子载 波间隔f1与参考子载波间隔f0的关系，对预设的生成序列每隔2n个抽取一个抽取获得；其中，预设的生成序列为参考子载波间隔f0对应的参考信号序列的生成序列。
在一种可能的实现方式中，接收机还包括：发送单元，用于向发射机发送指示信息，以使发射机根据指示信息，确定参考根索引q。
在一种可能的实现方式中，若接收机为基站，发送单元，还用于向发射机发送控制信令或者高层信令，控制信令或者高层信令包含发射机发送参考信号的频域资源信息，以使发射机根据频域资源信息，确定第一子载波间隔f1。
第五方面，提供一种发射机，发射机包括存储器、处理器、系统总线和通信接口，存储器中存储代码和数据，处理器与存储器通过系统总线连接，处理器运行存储器中的代码使得发射机执行第一方面或第一方面任一种可能的实现方式所提供的参考信号发送方法。
第六方面，提供一种接收机，接收机包括存储器、处理器、系统总线和通信接口，存储器中存储代码和数据，处理器与存储器通过系统总线连接，处理器运行存储器中的代码使得接收机执行上述第二方面或第二方面任一种可能的实现方式所提供参考信号处理方法。
第七方面，提供一种计算机可读存储介质，计算机可读存储介质中存储有计算机执行指令，当设备的至少一个处理器执行该计算机执行指令时，该设备执行上述第一方面或第一方面任一种可能的实现方式所提供的参考信号发送方法，或者执行上述第二方面或第二方面任一种可能的实现方式所提供的参考信号处理方法。
第八方面，提供一种计算机程序产品，该计算机程序产品包括计算机执行指令，该计算机执行指令存储在计算机可读存储介质中；设备的至少一个处理器可以从计算机可读存储介质读取该计算机执行指令，至少一个处理器执行该计算机执行指令使得设备实施上述第一方面或第一方面任一种可能的实现方式所提供的参考信号发送方法，或者执行上述第二方面或第二方面任一种可能的实现方式所提供的参考信号处理方法。
第九方面，提供一种通信系统，通信系统包括上述第五方面所提供的发射机，以及上述第六方面所提供的接收机。
本发明的实施例提供的参考信号发送方法、参考信号处理方法及设备中，发射机通过根据第一子载波间隔f1，确定第一子载波间隔f1对应的第一参考信号序列，以及在其服务小区使用第一子载波间隔f1在至少一个OFDM符号上发送第一参考信号序列，使接收机在至少一个OFDM符号上接收到该第一参考信号序列，从而使得同一服务小区内的参考信号序列具有较高的相关性，不同服务小区的参考信号序列具有较低的相关性，进而避免了不同服务小区相同时频资源上发送参考信号的干扰。
附图说明
为了更清楚地说明本发明实施例的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为一种发送参考信号的时频资源的示意图；
图2为本发明实施例提供的一种通信系统的结构示意图；
图3为本发明实施例提供的一种基站的结构示意图；
图4为本发明实施例提供的一种基带子系统的结构示意图；
图5为本发明实施例提供的一种用户设备的结构示意图；
图6为本发明实施例提供的一种参考信号发送方法的流程图；
图7为本发明实施例提供的一种参考信号序列的示意图；
图8为本发明实施例提供的一种时频资源的示意图；
图9为本发明实施例提供的另一种参考信号发送方法的流程图；
图10为本发明实施例提供的一种发射机的结构示意图；
图11为本发明实施例提供的另一种发射机的结构示意图；
图12为本发明实施例提供的又一种发射机的结构示意图；
图13为本发明实施例提供的一种接收机的结构示意图；
图14为本发明实施例提供的另一种接收机的结构示意图；
图15为本发明实施例提供的又一种接收机的结构示意图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
在介绍本发明之前，首先对本发明实施例涉及的技术名词进行简单介绍。
参考信号，是指用于对信道质量进行测量，或者用于对UE进行相干检测和数据解调的信号。其中，参考信号主要可以包括：解调参考信号(英文：demodulation reference signal，简称：DMRS)、信道探测参考信号(英文：sounding reference signal，简称：SRS)和随机接入信道(英文：random access channel，简称：RACH)前导信号。
参考信号序列，是指参考信号映射在资源单元上时使用的序列码，上述三种参考信号DMRS、SRS和RACH前导信号通常都是基于Zadoff-Chu(ZC)序列，并且都是产生之后直接映射到资源单元上，并不作任何编码的处理。
基序列，是指生成参考信号序列的序列，且参考信号序列是由基序列进行频率域上的相位旋转产生的序列。比如，将某一经过循环扩充后的ZC序列在频域上进行相位旋转，即可产生一个参考信号序列，此时，可以将经过循环扩充后的ZC序列称为该参考信号序列对应的基序列。
基序列的根索引，是指用于生成基序列的根索引，以ZC序列为基序列为例，若根索引为q 1，则根据根索引q 1和ZC序列的公式(1)，生成的序列即称为ZC序列，根索引即为生成的ZC序列的根索引。式中，NZC为ZC序列的长度，m取值从0到NZC-1；
Figure PCTCN2017101969-appb-000001
生成序列，是指生成基序列的序列，且基序列是由生成序列进行循环扩展或截断产生的序列，比如，生成序列可以包括Gold序列和ZC序列。若生成序列为Gold序列，参考信号序列可由Gold序列的截断序列生成；或者，生成序列为ZC序列，参考信号序列由ZC序列经过循环扩充后，再对扩充后的序列增加相位旋转来产生，所述q 1为ZC序列的指标。
图2为本发明的实施例所应用的通信系统的结构示意图，参见图2，该通信系统包括基站101和用户设备102。在本发明实施例中，发射机为用户设备102，则接收机为基站101；若发射机为基站101，则接收机为用户设备102。
其中，基站101具有共享信道的调度功能，具有基于发送到用户设备102的分组数据的历史来建立调度的功能，调度就是在多个用户设备102共用传输资源时，需要有一种机制来有效地分配物理层资源，以获得统计复用增益。另外，多个用户设备102可以位于该基站101的服务小区中，其中，基站101的服务小区可以包括一个或者多个，比如，如图2所示，基站101的服务小区可以为两个，即小区1和小区2。
用户设备102具有通过与基站101之间建立的通信信道103而发送和接收数据的功能。用户设备102根据通过调度控制信道发送的信息，进行共享信道的发送或接收处理。另外，用户设备102可以是移动台，手机、计算机以及便携终端等等，且该用户设备102的类型可以相同，也可以不同。
基站101与用户设备102之间通过通信信道进行数据的接收和发送，该通信信道可以是无线通信信道，且在无线通信信道中，至少存在共享信道和调度控制信道，共享信道是为了发送和接收分组而在多个用户设备102之间公用，调度控制信道用于发送共享信道的分配、以及相应的调度结果等。
图3为本发明实施例提供的一种基站的硬件结构图，如图3所示，该基站包括基带子系统、中射频子系统、天馈子系统和一些支撑结构(例如，整机子系统)，其中，基带子系统用于实现整个基站的操作维护，实现信令处理、无线资源原理、到分组核心网的传输接口，实现LTE物理层、介质访问控制层、L3信令、操作维护主控功能；中射频子系统实现基带信号、中频信号和射频信号之间的转换，实现LTE无线接收信号的解调和发送信号的调制和功率放大；天馈子系统包括连接到基站射频模块的天线和馈线以及GRS接收卡的天线和馈线，用于实现无线空口信号的接收和发送；整机子系统，是基带子系统和中频子系统的支撑部分，提供结构、供电和环境监控功能。
其中，基带子系统可以如图4所示：例如，手机上网需要通过基站接入核心网，在通过核心网接入因特网，其中因特网的数据通过核心网与基站之间的接口，传递到基带部分，基带部分进行PDCP，RLC，MAC层、编码，调制等处理，交给射频部分发射给用户设备。基带与射频之间可以通过CPRI接口连接；另外，射频部分目前可以通过光纤拉远，例如拉远的RRU。本发明实施例中的数据传输方法的各个步骤基带通过射频来实现，同时接收发送步骤是通过天线(例如，空中接口)来实现的。
本发明实施中涉及的用户设备与基站之间的接口可以理解为用户设备与基站 之间进行通信的空中接口，或者也可以称为Uu接口。
图5为本发明实施例所应用的用户设备的结构示意图，该用户设备可以为手机、平板电脑、笔记本电脑、超级移动个人计算机、上网本、个人数字助理等，本发明实施例以UT为手机为例进行说明，图4示出的是与本发明各实施例相关的手机的部分结构的框图。
如图5所示，手机包括：存储器、处理器、射频(英文：radio frequency，简称：RF)电路、以及电源等部件。本领域技术人员可以理解，图5中示出的手机结构并不构成对手机的限定，可以包括比图示更多或更少的部件，或者组合某些部件，或者不同的部件布置。
下面结合图5对手机的各个构成部件进行具体的介绍：
存储器可用于存储软件程序以及模块，处理器通过运行存储在存储器的软件程序以及模块，从而执行手机的各种功能应用以及数据处理。存储器可主要包括存储程序区和存储数据区，其中，存储程序区可存储操作系统、至少一个功能所需的应用程序等；存储数据区可存储根据手机的使用所创建的数据等。此外，存储器可以包括高速随机存取存储器，还可以包括非易失性存储器等。
处理器是手机的控制中心，利用各种接口和线路连接整个手机的各个部分，通过运行或执行存储在存储器内的软件程序和/或模块，以及调用存储在存储器内的数据，执行手机的各种功能和处理数据，从而对手机进行整体监控。可选的，处理器可包括一个或多个处理单元；优选的，处理器可集成应用处理器和调制解调处理器，其中，应用处理器主要处理操作系统、用户界面和应用程序等，调制解调处理器主要处理无线通信。
RF电路可用于收发信息或通话过程中，信号的接收和发送。通常，RF电路包括但不限于天线、至少一个放大器、收发信机、耦合器、低噪声放大器、双工器等。此外，RF电路还可以通过无线通信与网络和其他设备通信。所述无线通信可以使用任一通信标准或协议，包括但不限于全球移动通讯系统、通用分组无线服务、码分多址、宽带码分多址、长期演进、电子邮件、短消息服务等。
手机还包括给各个部件供电的电源，优选的，电源可以通过电源管理系统与处理器逻辑相连，从而通过电源管理系统实现管理充电、放电、以及功耗管理等功能。
尽管未示出，手机还可以包括输入单元、显示单元、传感器模块、音频模块、WiFi模块、蓝牙模块等，在此不再赘述。
图6为本发明实施例提供的一种参考信号发送方法的流程示意图，参见图6，该方法包括以下几个步骤。
步骤201：发射机根据第一子载波间隔f1，确定第一子载波间隔f1对应的第一参考信号序列；其中，第一子载波间隔f1是指相邻两个子载波峰值的频率间隔。
其中，第一参考信号序列是可以根据第一子载波间隔f1，对预设的生成序列抽取获得，预设的生成序列包括Gold序列或ZC序列；或者，第一参考信号序列由第一参考信号序列对应基序列的根索引Q确定，根索引Q由第一子载波间隔f1确定，其中，所述Q为ZC序列的一个指标。
下面分别对这两种确定第一参考信号序列的方法进行阐述，具体如下所述。
第一种、第一参考信号序列是根据第一子载波间隔f1，对预设的生成序列抽取获得，预设的生成序列包括Gold序列或ZC序列。
其中，当发射机根据第一子载波间隔f1，确定第一子载波间隔f1对应的第一参考信号序列时，发射机可以先根据第一子载波间隔f1，确定从预设的生成序列中抽取第一参考信号序列的抽取间隔，再按照确定的抽取间隔对预设的生成序列进行抽取，从而获得第一参考信号序列。
可选的，当发射机根据第一子载波间隔f1，确定从预设的生成序列中抽取第一参考信号序列的抽取间隔时，发射机可以从预设的子载波间隔与抽取间隔之间的对应关系中，获取第一子载波间隔f1对应的抽取间隔，并将获取的抽取间隔确定为从预设的生成序列中抽取第一参考信号序列的抽取间隔。
或者，若存在参考子载波间隔，第一子载波间隔f1与参考子载波间隔f0的关系为：f1＝f0*2n，n为大于等于0的整数，当发射机根据第一子载波间隔f1，确定从预设的生成序列中抽取第一参考信号序列的抽取间隔时，发射机可以根据第一子载波间隔f1与参考子载波间隔f0的关系，将2n确定为从预设的生成序列中抽取第一参考信号序列的抽取间隔，从而对预设的生成序列每隔2n个抽取一个，从而获得第一参考信号序列的基序列，进而可根据第一参考信号序列的基序列生成第一参考信号序列；此时，预设的生成序列可以为参考子载波间隔f0对应的参考信号序列的生成序列。
比如，若第一子载波间隔f1且为30kHz，参考子载波间隔f0为15kHz，则f1＝f0*21，发射机根据f1和f0的关系，确定的抽取间隔为f1/f0＝2，若f0对应的参考信号序列的生成序列如图7中的(a)所示，具体为zc(0)～zc(10)，当第一参考信号序列的长度为12时，发射机按照确定的抽取间隔从生成序列zc0～zc10的循环扩充序列中，每隔2个抽取一次，从而得到的第一参考信号序列的基序列如图7中的(b)所示，具体为zc(0)、zc(2)、zc(4)、zc(6)、zc(8)、zc(10)、zc(1)、zc(3)、zc(5)、zc(7)、zc(9)、zc(0)。其中，第一参考信号序列基序列中包括的zc(1)、zc(3)、zc(5)、zc(7)、zc(9)、zc(0)是对生成序列zc(0)～zc(10)进行循环扩展后每隔2个抽取的序列码。
需要说明的是，第一子载波间隔f1与参考子载波间隔f0的关系为：f1＝f0*2n时，第一参考信号序列对应基序列的根索引Q与参考根索引q存在如下关系：Q＝q(2n)2；其中，参考根索引q为参考基序列的根索引，该参考基序列是指参考子载波间隔f0对应的参考信号序列对应的基序列。
第二种、第一参考信号序列由第一参考信号序列对应基序列的根索引Q确定，根索引Q由第一子载波间隔f1确定。具体的，发射机确定第一参考信号序列的方法可以包括：步骤a-步骤c。
步骤a：根据第一子载波间隔f1确定第一参考信号序列对应基序列的根索引Q。
可选的，当发射机根据第一子载波间隔f1确定第一参考信号序列对应基序列的根索引Q时，发射机可以根据第一子载波间隔f1和第一参考信号序列的长度M，从序列组标识对应的第一对应关系中，获取第一参考信号序列对应基序列的根索引Q；其中，第一对应关系至少包括第一子载波间隔f1、第一参考信号序列的长度M、以及与f1和M对应的序列根索引，序列根索引为第一参考信号序列对应基序列的根索引。
比如，若第一子载波间隔f1为30kHz，第一参考信号序列的长度M为36，则发 射机根据第一子载波间隔f1＝30kHz和第一参考信号序列的长度M＝36，从如下表1所示的序列组标识对应的第一对应关系中，获取第一参考信号序列对应基序列的根索引Q为4。
表1
Figure PCTCN2017101969-appb-000002
需要说明的是，上述表1所示的第一对应关系中的间隔是指预设的子载波间隔，长度是指预设的参考信号序列的长度，且上述表1所示的第一对应关系仅为示例性的，上述表1并不对本发明实施例构成限定。
若第一子载波间隔f1与参考子载波间隔f0的关系为：f1＝f0*2n，n为大于等于0的整数，第一参考信号序列对应基序列的根索引Q与参考根索引q存在如下关系：Q＝q(2n)2；其中，参考根索引q为参考基序列的根索引，该参考基序列是指参考子载波间隔f0对应的参考信号序列对应的基序列。
可选的，当发射机根据第一子载波间隔f1确定第一参考信号序列对应基序列的根索引Q时，发射机可以先确定参考根索引q，再结合第一子载波间隔f1与参考子载波间隔f0的关系，确定根索引Q。
其中，当发射机确定参考根索引q时，发射机可以确定其服务小区所使用的参考信号序列组的序列组标识，并根据该序列组标识，确定参考根索引q。
具体的，发射机确定该序列组标识的过程可以为：发射机接收同步信息，该同步信息包含其服务小区的小区标识，发射机根据该小区标识与通信系统中包括的参考信号序列组总数量，确定该序列组标识。
比如，若序列组标识为序列组的组号，发射机可以将该序列组的组号相对于通信系统中包括的参考信号序列组总数量的余数，确定为参考根索引q。
需要说明的是，一个通信系统中可以包括多个参考信号序列组，一个参考信号序列组中可以包括多个参考信号序列，且同一组内的参考信号序列之间的互相关性较高，不同组内的参考信号序列之间的互相关性较低。比如，在LTE系统中，参考信号序列组的总数量可以为30。
另外，当发射机确定参考根索引q时，发射机还可以接收由接收机发送的指示信息，并根据该指示信息，确定参考根索引q。
具体的，当发射机接收到该指示信息时，发射机可以根据接收的指示信息，从存 储的预设指示信息与预设参考根索引之间的对应关系，获取与该指示信息对应的预设参考根索引，并将获取的预设参考根索引确定为参考根索引q。
比如，若发射机接收的指示信息为信息1，从如下表2所示的预设指示信息与预设参考根索引之间的对应关系中，获取与信息1对应的预设参考根索引为索引1，则将索引1确定为参考根索引q。
表2
预设指示信息 预设参考根索引
信息0 索引0
信息1 索引1
信息2 索引2
…… ……
需要说明的是，上述表2所示的预设指示信息与预设参考根索引之间的关系仅为示例性的，上述表2并不对本发明实施例构成限定。
需要说明的是，接收机发送的该指示信息可以包含在系统信息中，该系统信息可以通过广播的方式发送给发射机。
步骤b：根据确定的根索引Q生成第一参考信号序列对应的基序列。
可选的，当发射机根据第一参考信号序列对应基序列的根索引Q生成第一参考信号序列对应的基序列时，若第一参考信号序列对应基序列为ZC序列，则发射机可以基于根索引Q，根据如下公式(2)生成第一参考信号序列对应的基序列；式(2)中，NZC为ZC序列的长度，M为第一参考信号序列的长度，xq[]为参考根索引q对应的ZC序列，mod为取余的符号。或者，
若第一参考信号序列对应基序列为Gold序列，发射机以第一参考信号序列对应基序列的根索引Q与参考根索引q的关系，根据如下公式(3)生成第一参考信号序列对应的基序列；式(3)中，L为Gold序列的长度，M为第一参考信号序列的长度，y[]为初始Gold序列。
r(i)＝xq[((2n)2*i+k)mod NZC],0≤i＜M,k＝0,1,...,2n-1   (2)
r(i)＝y([(2n)2*i+k]mod L),0≤i＜M,k＝0,1,...,2n-1   (3)
需要说明的是，当第一子载波间隔f1与参考子载波间隔f0相等时，则n等于0，第一参考信号序列对应基序列的根索引Q与参考根索引q也相等，从而按照上述步骤b生成的第一参考信号序列对应的基序列，即为参考根索引q对应的参考信号序列对应的基序列。
步骤c：发射机根据该第一参考信号序列对应的基序列生成第一参考信号序列。
当发射机根据上述步骤b生成第一参考信号序列对应的基序列之后，发射机可以对生成的基序列进行循环移位，从而得到对应的第一参考信号序列。
步骤202：发射机在其服务小区使用第一子载波间隔f1在至少一个OFDM符号上向接收机发送第一参考信号序列。
步骤203：接收机在至少一个OFDM符号上接收发射机在其服务小区使用第一子载波间隔f1发送的第一参考信号序列。
具体的，当发射机确定第一子载波间隔f1对应的第一参考信号序列之后，发射机可以在其服务小区使用第一子载波间隔f1在至少一个OFDM符号上发送第一参考信号序列，从而接收机可以在至少一个OFDM符号上接收发射机使用第一子载波间隔f1发送的第一参考信号序列。
可选的，若该服务小区配置有至少两个子载波间隔，比如，该至少两个子载波间隔的个数为2，且分别为第一子载波间隔f1和第二子载波间隔f2，发射机使用第一子载波间隔f1、和/或第二子载波间隔f2发送参考信号序列，并使用第一子载波间隔f1、和/或第二子载波间隔f2发送数据，若发送参考信号序列和发送数据时使用的子载波间隔不同，则发射机可以通过时分复用的方式使用对应的子载波间隔发送参考信号序列和数据，具体是指发送参考信号序列的时域资源与发送数据的时域资源不同。
比如，如图8所示，发射机使用第一子载波间隔f1发送参考信号序列，使用第二子载波间隔f2发送数据，且f2＝2f1，则发射机用于发送参考信号序列的时频资源可以如图8所示。
另外，若该服务小区使用至少两个子载波间隔发送参考信号序列，则对于一个参考信号序列长度，该服务小区所使用的参考信号序列组对应的基序列组中包括至少基序列。
步骤204：接收机确定第二参考信号序列，并根据确定的第二参考信号序列，对接收到的第一参考信号序列进行处理；其中，第二参考信号序列是根据第一子载波间隔f1确定的。
其中，接收机根据第一子载波间隔f1确定第二参考信号序列的方法与上述步骤201中根据第一子载波间隔f1确定第一参考信号序列的方法一致，具体参见上述步骤201中的描述，本发明实施例在此不再赘述。
当接收机确定第二参考信号序列后，可以根据第二参考信号序列，对接收到的第一参考信号序列进行处理，具体的处理过程为：将接收到的第一参考信号与接收机确定的第二参考信号序列进行相关处理，处理方法为两个序列中每一个对应的元素相乘，并求和。
需要说明的是，当本发明实施例提供的参考信号发送方法应用于基站和用户设备之间时，则在上述步骤201-204中，当用户设备作为发射机时，基站可以作为接收机；或者，当用户设备作为接收机时，基站可以作为发射机。当然，在实际应用中，发射机或接收机也可能为其他设备，本发明实施例对此不做具体限定。
进一步的，当基站作为接收机时，参见图9，在步骤201之前，该方法还包括：步骤205-步骤206。
步骤205：基站向发射机发送控制信令或者高层信令，该控制信令或者高层信令包含发射机发送参考信号的频域资源信息。
步骤206：当发射机接收到该控制信令或者高层信令时，发射机可以根据该控制信令或者高层信令，确定发送参考信号的频域资源信息。
其中，频域资源信息包括时域资源信息和频域资源信息，时域资源可以是OFDM符号，频域资源可以是子载波间隔、间隔子载波数等等，其中，间隔子载波数是指参考信号序列映射在频域上时，相邻元素之间间隔的子载波个数。
具体的，当基站向发射机发送控制信令或者高层信令后，发射机可以根据接收到的控制信令或者高层信令，确定发送参考信号的频域资源信息。
比如，当发射机接收到该控制信令或者高层信令时，发射机可以根据该控制信令或者高层信令确定用于发送参考信号的第一子载波间隔f1和至少一个OFDM符号。
本发明实施例提供的参考信号发送方法中，发射机通过根据第一子载波间隔f1，确定第一子载波间隔f1对应的第一参考信号序列，以及在其服务小区使用第一子载波间隔f1在至少一个OFDM符号上发送第一参考信号序列，使接收机在至少一个OFDM符号上接收到该第一参考信号序列，从而使得同一服务小区内的参考信号序列具有较高的相关性，不同服务小区的参考信号序列具有较低的相关性，进而避免了不同服务小区相同时频资源上发送参考信号的干扰。
上述主要从各个网元之间交互的角度对本发明实施例提供的方案进行了介绍。可以理解的是，各个网元，例如发射机、接收机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网元及算法步骤，本发明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发明的范围。
本发明实施例可以根据上述方法示例对发射机、接收机等进行功能模块的划分，例如，可以对应各个功能划分各个功能模块，也可以将两个或两个以上的功能集成在一个处理模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。需要说明的是，本发明实施例中对模块的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。
在采用对应各个功能划分各个功能模块的情况下，图10示出了上述实施例中所涉及的发射机的一种可能的结构示意图，发射机300包括：确定单元301、发送单元302。其中，确定单元301用于执行图6中的过程201、图9中的过程201和206；发送单元302用于执行图6和图9中的过程202。进一步的，该发射机还可以包括接收单元303，其中，接收单元303用于接收由接收机发送的控制信令或者高层信令。上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述，在此不再赘述。
在采用集成的单元的情况下，图11示出了上述实施例中所涉及的发射机310的一种可能的逻辑结构示意图。发射机310包括：处理模块312和通信模块313。处理模块312用于对发射机的动作进行控制管理，例如，处理模块312用于执行图6中的过程201、以及图9中的过程201和206，和/或用于本文所描述的技术的其他过程。通信模块313用于与接收机之间的通信。发射机310还可以包括存储模块311，用于存储发射机的程序代码和数据。
其中，处理模块312可以是处理器或控制器，例如可以是中央处理器单元，通用处理器，数字信号处理器，专用集成电路，现场可编程门阵列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。其可以实现或执行结合本发 明公开内容所描述的各种示例性的逻辑方框，模块和电路。所述处理器也可以是实现计算功能的组合，例如包含一个或多个微处理器组合，数字信号处理器和微处理器的组合等等。通信模块313可以是收发器、收发电路或通信接口等。存储模块311可以是存储器。
当处理模块312为处理器，通信模块313为通信接口，存储模块311为存储器时，本发明实施例所涉及的发射机可以为图12所示的设备。
参阅图12所示，为发射机的一种硬件结构举例，该发射机320包括：处理器322、通信接口323、存储器321以及总线324。其中，通信接口323、处理器322以及存储器321通过总线324相互连接；总线324可以是外设部件互连标准(英文：peripheral component interconnect，简称：PCI)总线或扩展工业标准结构(英文：extended industry standard architecture，简称：EISA)总线等。所述总线可以分为地址总线、数据总线、控制总线等。为便于表示，图12中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
在采用对应各个功能划分各个功能模块的情况下，图13示出了上述实施例中所涉及的接收机的一种可能的结构示意图，接收机400包括：接收单元401、确定单元402。其中，接收单元401用于执行图6和图9中的过程203；确定单元402用于执行图6和图9中的过程204。进一步的，该接收机还可以包括发送单元403，其中，发送单元403用于执行图9中向发射机发送控制信令或者高层信令的过程205。上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述，在此不再赘述。
在采用集成的单元的情况下，图14示出了上述实施例中所涉及的接收机410的一种可能的逻辑结构示意图。接收机410包括：处理模块412和通信模块413。处理模块412用于对接收机的动作进行控制管理，例如，处理模块412用于执行图6和图9中的过程204，和/或用于本文所描述的技术的其他过程。通信模块413用于与接收机之间的通信。发射机410还可以包括存储模块411，用于存储接收机的程序代码和数据。
其中，处理模块412可以是处理器或控制器，例如可以是中央处理器单元，通用处理器，数字信号处理器，专用集成电路，现场可编程门阵列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。其可以实现或执行结合本发明公开内容所描述的各种示例性的逻辑方框，模块和电路。所述处理器也可以是实现计算功能的组合，例如包含一个或多个微处理器组合，数字信号处理器和微处理器的组合等等。通信模块413可以是收发器、收发电路或通信接口等。存储模块411可以是存储器。
当处理模块412为处理器，通信模块413为通信接口，存储模块411为存储器时，本发明实施例所涉及的接收机可以为图15所示的设备。
参阅图15所示，为接收机的一种硬件结构举例，该接收机420包括：处理器422、通信接口423、存储器421以及总线424。其中，通信接口423、处理器422以及存储器421通过总线424相互连接；总线424可以是PCI总线或EISA总线等。所述总线可以分为地址总线、数据总线、控制总线等。为便于表示，图15中仅用 一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
在本发明的另一实施例中，还提供一种计算机可读存储介质，计算机可读存储介质中存储有计算机执行指令，当设备的至少一个处理器执行该计算机执行指令时，该设备执行上述图6或图9所提供的参考信号发送方法中发射机的步骤，或者执行上述图6或图9所提供的参考信号发送方法中接收机的步骤。
在本发明的另一实施例中，还提供一种计算机程序产品，该计算机程序产品包括计算机执行指令，该计算机执行指令存储在计算机可读存储介质中；设备的至少一个处理器可以从计算机可读存储介质读取该计算机执行指令，至少一个处理器执行该计算机执行指令使得设备实施上述图6或图9所提供的参考信号发送方法中发射机的步骤，或者实施上述图6或图9所提供的参考信号发送方法中接收机的步骤。
在本发明的另一实施例中，还提供一种通信系统，该通信系统包括上述图10-图12任一个所示的发射机，以及图13-图15任一个所示的接收机；其中，发射机用于执行图6或图9所提供的参考信号发送方法中发射机的步骤，接收机用于执行图6或图9所提供的参考信号发送方法中发接收机的步骤。
本发明实施例提供的通信系统中，发射机通过根据第一子载波间隔f1，确定第一子载波间隔f1对应的第一参考信号序列，以及在其服务小区使用第一子载波间隔f1在至少一个OFDM符号上发送第一参考信号序列，使接收机在至少一个OFDM符号上接收到该第一参考信号序列，从而使得同一服务小区内的参考信号序列具有较高的相关性，不同服务小区的参考信号序列具有较低的相关性，进而避免了不同服务小区相同时频资源上发送参考信号的干扰。
最后应说明的是：以上实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。

Claims (29)

  1. 一种参考信号发送方法，其特征在于，所述方法包括：
    发射机根据第一子载波间隔f1，确定所述第一子载波间隔f1对应的第一参考信号序列；其中，第一子载波间隔f1是指相邻两个子载波峰值的频率间隔；
    所述发射机在其服务小区使用所述第一子载波间隔f1在至少一个OFDM符号上发送所述第一参考信号序列。
  2. 根据权利要求1所述的方法，其特征在于，
    所述第一参考信号序列是根据所述第一子载波间隔f1，对预设的生成序列抽取获得；其中，所述预设的生成序列包括Gold序列或ZC序列；或者，
    所述第一参考信号序列由所述第一参考信号序列对应基序列的根索引Q确定，所述根索引Q由所述第一子载波间隔f1确定。
  3. 根据权利要求2所述的方法，其特征在于，若所述第一子载波间隔f1与参考子载波间隔f0的关系为：所述f1＝f0*2n，所述n为大于等于0的整数，则所述第一参考信号序列对应基序列的根索引Q与所述参考根索引q存在如下关系：Q＝q(2n)2；其中，所述参考根索引q为参考基序列的根索引，所述参考基序列是指所述参考子载波间隔f0对应的参考信号序列对应的基序列；
    所述第一子载波间隔f1对应的第一参考信号序列是根据所述第一子载波间隔f1，对预设的生成序列抽取获得，具体为：根据所述第一子载波间隔f1与所述参考子载波间隔f0的关系，对所述预设的生成序列每隔2n个抽取一个抽取获得；其中，所述预设的生成序列为所述参考子载波间隔f0对应的参考信号序列的生成序列。
  4. 根据权利要求3所述的方法，其特征在于，所述方法还包括：
    所述发射机确定所述服务小区所使用的参考信号序列组的序列组标识；
    所述发射机根据所述序列组标识，确定所述参考根索引q。
  5. 根据权利要求3所述的方法，其特征在于，所述方法还包括：
    所述发射机接收接收机发送的指示信息，并根据所述指示信息，确定所述参考根索引q。
  6. 根据权利要求3-5任一项所述的方法，其特征在于，所述方法还包括：
    所述发射机根据所述第一子载波间隔f1和所述第一参考信号序列的长度M，从所述序列组标识对应的第一对应关系中，获取所述第一参考信号序列对应基序列的根索引Q；其中，所述第一对应关系至少包括所述第一子载波间隔f1、所述第一参考信号序列的长度M、以及与所述f1和所述M对应的序列根索引，所述序列根索引为所述第一参考信号序列对应基序列的根索引。
  7. 根据权利要求1-6任一项所述的方法，其特征在于，若所述接收机为基站，所述发射机根据第一子载波间隔f1，确定所述第一子载波间隔f1对应的第一参考信号序列之前，所述方法还包括：
    所述发射机接收所述基站发送的控制信令或者高层信令，所述控制信令或者所述高层信令包含所述发射机发送参考信号的频域资源信息；
    所述发射机根据所述频域资源信息，确定所述第一子载波间隔f1。
  8. 一种参考信号处理方法，其特征在于，所述方法包括：
    接收机在至少一个OFDM符号上接收发射机在其服务小区使用第一子载波间隔f1发送的所述第一子载波间隔f1对应的第一参考信号序列；
    其中，所述第一子载波间隔f1对应的第一参考信号序列由所述发射机根据所述第一子载波间隔f1进行确定。
  9. 根据权利要求8所述的方法，其特征在于，所述方法还包括：
    所述接收机确定第二参考信号序列，并根据确定的第二参考信号序列，对接收到的第一参考信号序列进行处理；其中，所述第二参考信号序列是根据所述第一子载波间隔f1确定的。
  10. 根据权利要求9所述的方法，其特征在于，
    所述第一参考信号序列根据所述第一子载波间隔f1，对预设的生成序列抽取获得；其中，所述预设的生成序列包括Gold序列或ZC序列；或者，
    所述第一参考信号序列由所述第一参考信号序列对应基序列的根索引Q确定，所述根索引Q由所述第一子载波间隔f1确定。
  11. 根据权利要求10所述的方法，其特征在于，若所述第一子载波间隔f1与参考子载波间隔f0的关系为：所述f1＝f0*2n，所述n为大于等于0的整数，则所述第一参考信号序列对应基序列的根索引Q与所述参考根索引q存在如下关系：Q＝q(2n)2；其中，所述参考根索引q为参考基序列的根索引，所述参考基序列是指所述参考子载波间隔f0对应的参考信号序列对应的基序列；
    所述第一参考信号序列是根据所述第一子载波间隔f1，对预设的生成序列抽取获得，具体为：根据所述第一子载波间隔f1与所述参考子载波间隔f0的关系，对所述预设的生成序列每隔2n个抽取一个抽取获得；其中，所述预设的生成序列为所述参考子载波间隔f0对应的参考信号序列的生成序列。
  12. 根据权利要求11所述的方法，其特征在于，所述方法还包括：
    所述接收机向所述发射机发送指示信息，以使所述发射机根据所述指示信息，确定参考根索引q。
  13. 根据权利要求8-12任一项所述的方法，其特征在于，若所述接收机为基站，所述方法还包括：
    所述基站向所述发射机发送控制信令或者高层信令，所述控制信令或者所述高层信令包含所述发射机发送参考信号的频域资源信息，以使所述发射机根据所述频域资源信息，确定所述第一子载波间隔f1。
  14. 一种发射机，其特征在于，所述发射机包括：
    确定单元，用于根据第一子载波间隔f1，确定所述第一子载波间隔f1对应的第一参考信号序列；其中，第一子载波间隔f1是指相邻两个子载波峰值的频率间隔；
    发送单元，用于在其服务小区使用所述第一子载波间隔f1在至少一个OFDM符号上发送所述第一参考信号序列。
  15. 根据权利要求14所述的发射机，其特征在于，
    所述第一参考信号序列是根据所述第一子载波间隔f1，对预设的生成序列抽取获得；其中，所述预设的生成序列包括Gold序列或ZC序列；或者，
    所述第一参考信号序列由所述第一参考信号序列对应基序列的根索引Q确定，所述根索引Q由所述第一子载波间隔f1确定。
  16. 根据权利要求15所述的发射机，其特征在于，若所述第一子载波间隔f1与参考子载波间隔f0的关系为：所述f1＝f0*2n，所述n为大于等于0的整数，则所述第一参考信号序列对应基序列的根索引Q与所述参考根索引q存在如下关系：Q＝q(2n)2；其中，所述参考根索引q为参考基序列的根索引，所述参考基序列是指所述参考子载波间隔f0对应的参考信号序列对应的基序列；
    所述第一子载波间隔f1对应的第一参考信号序列是根据所述第一子载波间隔f1，对预设的生成序列抽取获得，具体为：根据所述第一子载波间隔f1与所述参考子载波间隔f0的关系，对所述预设的生成序列每隔2n个抽取一个抽取获得；其中，所述预设的生成序列为所述参考子载波间隔f0对应的参考信号序列的生成序列。
  17. 根据权利要求16所述的发射机，其特征在于，所述确定单元，还用于：
    确定所述服务小区所使用的参考信号序列组的序列组标识；
    根据所述序列组标识，确定所述参考根索引q。
  18. 根据权利要求16所述的发射机，其特征在于，所述发射机还包括：
    接收单元，用于接收接收机发送的指示信息；
    所述确定单元，还用于根据所述指示信息，确定所述参考根索引q。
  19. 根据权利要求16-18任一项所述的发射机，其特征在于，所述确定单元，还用于
    根据所述第一子载波间隔f1和所述第一参考信号序列的长度M，从所述序列组标识对应的第一对应关系中，获取所述第一参考信号序列对应基序列的根索引Q；其中，所述第一对应关系至少包括所述第一子载波间隔f1、所述第一参考信号序列的长度M、以及与所述f1和所述M对应的序列根索引，所述序列根索引为所述第一参考信号序列对应基序列的根索引。
  20. 根据权利要求14-19任一项所述的发射机，其特征在于，若所述接收机为基站，
    所述接收单元，还用于接收所述基站发送的控制信令或者高层信令，所述控制信令或者所述高层信令包含所述发射机发送参考信号的频域资源信息；
    所述确定单元，还用于根据所述频域资源信息，确定所述第一子载波间隔f1。
  21. 一种接收机，其特征在于，所述接收机包括：
    接收单元，用于在至少一个OFDM符号上接收发射机在其服务小区使用第一子载波间隔f1发送的所述第一子载波间隔f1对应的第一参考信号序列；
    其中，所述第一子载波间隔f1对应的第一参考信号序列由所述发射机根据所述第一子载波间隔f1进行确定。
  22. 根据权利要求21所述的接收机，其特征在于，所述接收机还包括：
    确定单元，用于确定第二参考信号序列，并根据确定的第二参考信号序列，对接收到的第一参考信号序列进行处理；其中，所述第二参考信号序列是根据所述第一子载波间隔f1确定的。
  23. 根据权利要求22所述的接收机，其特征在于，
    所述第一参考信号序列根据所述第一子载波间隔f1，对预设的生成序列抽取获得；其中，所述预设的生成序列包括Gold序列或ZC序列；或者，
    所述第一参考信号序列由所述第一参考信号序列对应基序列的根索引Q确定，所述根索引Q由所述第一子载波间隔f1确定。
  24. 根据权利要求23所述的接收机，其特征在于，若所述第一子载波间隔f1与参考子载波间隔f0的关系为：所述f1＝f0*2n，所述n为大于等于0的整数，则所述第一参考信号序列对应基序列的根索引Q与所述参考根索引q存在如下关系：Q＝q(2n)2；其中，所述参考根索引q为参考基序列的根索引，所述参考基序列是指所述参考子载波间隔f0对应的参考信号序列对应的基序列；
    所述第一参考信号序列是根据所述第一子载波间隔f1，对预设的生成序列抽取获得，具体为：根据所述第一子载波间隔f1与所述参考子载波间隔f0的关系，对所述预设的生成序列每隔2n个抽取一个抽取获得；其中，所述预设的生成序列为所述参考子载波间隔f0对应的参考信号序列的生成序列。
  25. 根据权利要求24所述的接收机，其特征在于，所述接收机还包括：
    发送单元，用于向所述发射机发送指示信息，以使所述发射机根据所述指示信息，确定参考根索引q。
  26. 根据权利要求21-25任一项所述的接收机，其特征在于，若所述接收机为基站，
    所述发送单元，还用于向所述发射机发送控制信令或者高层信令，所述控制信令或者所述高层信令包含所述发射机发送参考信号的频域资源信息，以使所述发射机根据所述频域资源信息，确定所述第一子载波间隔f1。
  27. 一种发射机，其特征在于，所述发射机包括存储器、处理器、系统总线和通信接口，所述存储器中存储代码和数据，所述处理器与所述存储器通过所述系统总线连接，所述处理器运行存储器中的代码使得所述发射机执行上述权利要求1-7任一项所述的参考信号发送方法。
  28. 一种接收机，所述接收机包括存储器、处理器、系统总线和通信接口，所述存储器中存储代码和数据，所述处理器与所述存储器通过所述系统总线连接，所述处理器运行存储器中的代码使得所述接收机执行上述权利要求8-13任一项所述的参考信号处理方法。
  29. 一种通信系统，其特征在于，所述通信系统包括上述权利要求27所述的发射机，以及上述权利要求28所述的接收机。
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