WO2020114317A1 - Procédé et dispositif d'émission d'un signal de référence - Google Patents

Procédé et dispositif d'émission d'un signal de référence Download PDF

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Publication number
WO2020114317A1
WO2020114317A1 PCT/CN2019/121750 CN2019121750W WO2020114317A1 WO 2020114317 A1 WO2020114317 A1 WO 2020114317A1 CN 2019121750 W CN2019121750 W CN 2019121750W WO 2020114317 A1 WO2020114317 A1 WO 2020114317A1
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Prior art keywords
sequence
information
reference signal
computer
terminal
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PCT/CN2019/121750
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English (en)
Chinese (zh)
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刘凤威
陈磊
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华为技术有限公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2614—Peak power aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/261—Details of reference signals
    • 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

Definitions

  • the embodiments of the present application relate to the field of communication technologies, and in particular, to a reference signal transmission method and device.
  • the uplink uses orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) waveform and discrete Fourier transform extended orthogonal frequency division multiplexing (DFT spread OFDM, DFT-s-OFDM) waveform.
  • OFDM orthogonal frequency division multiplexing
  • DFT-s-OFDM waveform has good compatibility with the OFDM waveform, and the peak-to-average power ratio (PAPR) when using the DFT-s-OFDM waveform is significantly lower than that of the PAPR using the OFDM waveform.
  • PAPR peak-to-average power ratio
  • the DFT-s-OFDM waveform can reach a greater output power than the OFDM waveform, so the use of DFT-s-OFDM waveform can improve the uplink coverage.
  • the upstream data channel uses pi/2-binary phase shift keying (BPSK) modulation and uses DFT-s-OFDM waveforms.
  • pi/2-BPSK modulation can perform frequency domain spectrum shaping (frequency domain domain shaping, FDSS), which can achieve lower PAPR.
  • the uplink reference signal adopts QPSK sequence and ZC sequence and the DFT-s-OFDM waveform, and the PAPR of the uplink reference signal generated using QPSK sequence and ZC sequence is close to the DFT-s-OFDM waveform using QPSK modulation, that is, greater than PAPR of DFT-s-OFDM waveform using pi/2-BPSK modulation.
  • the PAPR gap between the two can be further increased.
  • the PAPR of the uplink reference signal is greater than the PAPR of the data channel.
  • the PAPR of the uplink reference signal is greater than the PAPR of the data channel, it may cause the following problems.
  • the PAPR of the combined signal of the reference signal and the data channel increases, causing the total output power of the signal to decrease; the reference signal performs power back-off, resulting in a decrease in channel estimation accuracy; the reference signal does not perform power back-off, because the PAPR of the reference signal is higher than the data
  • the PAPR of the channel may cause the reference signal to have a large distortion after passing through a power amplifier (PA), thereby affecting the channel estimation performance.
  • PA power amplifier
  • Embodiments of the present application provide a reference signal transmission method and device to solve the problem that when the uplink uses a DFT-s-OFDM waveform, the PAPR of the uplink reference signal is greater than the PAPR of the data channel.
  • a method for transmitting a reference signal is provided.
  • the execution body of the method is represented by a first device, and the first device may be a terminal or a network device.
  • the second device is a network device; when the first device is a network device, the second device is a terminal.
  • the method is mainly implemented by the following steps: the first device first obtains the reference signal sequence in the time domain, obtains the reference signal sequence in the frequency domain after the time-frequency domain conversion, and generates a reference signal for transmission.
  • the reference signal sequence in the time domain is easier to meet the requirements of low PAPR.
  • the length of the c[m] is K, K ⁇ N, the N and K are positive integers, the n 0 is a non-negative integer;
  • the first device pairs the second sequence Perform processing to obtain a reference signal;
  • the first device multiplexes the reference signal with a data channel, and sends the multiplexed signal to a second device.
  • the second sequence is a reference signal sequence in the time domain.
  • the second sequence is selected from the first sequence to match the length of the reference signal sequence.
  • the first device determines the information of the first sequence c[m] and the information of n 0 ; the first device according to the information of the first sequence c[m] and the The information of n 0 determines the second sequence d[n].
  • the method further includes: the first device determines a sequence number, which may also be called a number.
  • the first device determines the first sequence c[m] and the n 0 indexed by the sequence number.
  • each possible second sequence is determined by information of a first sequence c[m] and information of an initial shift value n 0 , and L possible second sequences are indexed by sequence numbers.
  • the L possible second sequences are pre-determined, which are specified by the protocol or configured by the network device for the terminal.
  • the first device sends the serial number information to the second device; if the first device is a terminal, the second device is a network Device, the first device receives the serial number information from the second device. In this way, on the basis of existing sequences, sequences with better frequency domain flatness performance can be obtained.
  • the first device is a network device
  • the second device is a terminal
  • the first device sends the information of the first sequence c[m] and the n 0 information; or, the first device sends the first sequence c[m] information to the second device.
  • the first device selects the first sequence c[m] from M candidate sequences, selects the n 0 from O candidate initial shift values, and the M, O Is a positive integer; the first device sends the information of the first sequence c[m] and the information of n 0 to the second device. In this way, on the basis of existing sequences, sequences with better frequency domain flatness performance can be obtained.
  • the first device is a terminal
  • the second device is a network device
  • the first device receives information of the first sequence c[m] from the second device; or, The first device receives the information of the first sequence c[m] and the information of n 0 from the second device.
  • the first sequence c[m] is a Gold sequence
  • the information of the first sequence c[m] is an initialization parameter of c[m].
  • the first sequence is a binary sequence or a ternary sequence.
  • the first sequence is a binary sequence
  • the first device performs pi/2-binary phase shift keying BPSK modulation on the second sequence.
  • the first sequence is a ternary sequence
  • the first device performs memory phase modulation on the second sequence.
  • the multiplexed signal includes one or more orthogonal frequency division multiplexed OFDM symbols
  • the first device carries the data modulation symbol and the reference signal in the OFDM symbol.
  • the reference signal occupies a length of 1/2 m of the length of the one OFDM symbol in one OFDM symbol, and m is a non-negative integer.
  • the terminal when the terminal has the capability of supporting the reference signal sequence involved in the present application, the terminal reports the capability to the network device, and the network device determines whether the terminal supports this capability according to the report of the terminal.
  • the reference signal includes a demodulation reference signal (DMRS) or a channel state information reference signal (channel state information-reference signal (CSI-RS).
  • DMRS demodulation reference signal
  • CSI-RS channel state information reference signal
  • the N is related to the data channel bandwidth.
  • a device for transmitting a reference signal is provided.
  • the device is applied to a terminal, or the device is applied to a network device, or the device is a terminal, or the device is a network device.
  • the function of the method performed by the first device includes means corresponding to the steps or functions described in the above aspect.
  • the steps or functions may be implemented by software, or hardware (such as a circuit), or a combination of hardware and software.
  • the above device includes one or more processors and a communication unit.
  • the one or more processors are configured to support the transmission device of the reference signal to perform the functions in the above method.
  • the second sequence d[n] is determined according to the first sequence c[m]
  • the second sequence is processed to obtain a reference signal
  • the reference signal is multiplexed with the data channel.
  • the communication unit is used to support the transmission device of the reference signal to communicate with other devices to implement receiving and/or sending functions. For example, the multiplexed signal is sent.
  • the device may further include one or more memories, which are used to couple with the processor, and store necessary program instructions and/or data of the device.
  • the one or more memories may be integrated with the processor, or may be provided separately from the processor. This application is not limited.
  • the communication unit may be a transceiver or a transceiver circuit.
  • the transceiver may also be an input/output circuit or an interface.
  • the device may also be a communication chip.
  • the communication unit may be an input/output circuit or an interface of a communication chip.
  • the above reference signal transmission device includes a transceiver, a processor, and a memory.
  • the processor is used to control a transceiver or an input/output circuit to send and receive signals
  • the memory is used to store a computer program
  • the processor is used to run the computer program in the memory so that the device performs the first aspect or any one of the first aspects Possible design methods.
  • a system including a terminal and a network device, wherein the terminal performs the method in the first network device in the first aspect or any possible design of the first aspect; or, The network device performs the method in the first network device in the first aspect or any possible design of the first aspect.
  • a computer-readable storage medium for storing a computer program, the computer program including instructions for performing the method of the first aspect or any one of the possible designs in the first aspect.
  • a computer program product comprising: computer program code, when the computer program code runs on a computer, the computer is caused to perform the first aspect or any one of the first aspect Possible design methods.
  • FIG. 1 is a schematic diagram of a system architecture in an embodiment of this application
  • FIG. 2 is a schematic flowchart of a reference signal transmission method in an embodiment of this application.
  • FIG. 3 is a schematic diagram of intercepting a sub-sequence in an embodiment of the present application.
  • FIG. 4 is a schematic diagram of a comb-shaped DMRS pattern in an embodiment of this application.
  • FIG. 5 is a schematic diagram of ternary sequence with memory phase modulation in an embodiment of the present application.
  • 6a is one of the schematic diagrams of multiplexing the time domain DMRS sequence and data in an embodiment of the present application
  • 6b is a second schematic diagram of multiplexing a time-domain DMRS sequence and data in an embodiment of the present application
  • FIG. 7 is a schematic diagram of multiplexing a data channel and a reference signal within a single symbol in an embodiment of this application;
  • FIG. 8 is a schematic diagram of a design of a pre-DFT multiplexing receiver before DFT in an embodiment of the present application
  • FIG. 9 is a first schematic structural diagram of a reference signal transmission device in an embodiment of the present application.
  • FIG. 10 is a second structural diagram of a reference signal transmission device in an embodiment of the present application.
  • the embodiments of the present application provide a reference signal transmission method and device.
  • the method and device are based on the same inventive concept. Since the principles of the method and device to solve the problem are similar, the implementation of the device and the method can be referred to each other, and the overlapping is not repeated Repeat.
  • "and/or" describes the association relationship of the associated objects, indicating that there may be three types of relationships, for example, A and/or B, which may indicate: A exists alone, and A and B exist simultaneously, separate There are three cases of B.
  • the character "/" generally indicates that the related object is a "or” relationship. At least one referred to in this application refers to one or more; multiple refers to two or more.
  • the words “first” and “second” are only used to distinguish the description, and cannot be understood as indicating or implying relative importance, nor as an indication. Or suggest the order.
  • the reference signal transmission method provided in the embodiments of the present application may be applied to a fourth generation (4th generation, 4G) communication system, a fifth generation (5th generation, 5G) communication system, or various future communication systems.
  • the embodiments of the present application are applicable to a communication system that uses single carrier waveform communication.
  • FIG. 1 shows a possible communication system architecture applicable to the reference signal transmission method provided by the embodiment of the present application.
  • the communication system 100 includes: a network device 101 and one or more terminals 102.
  • the network device 101 may also be connected to the core network.
  • the network device 101 may communicate with the IP network 103 through the core network.
  • the IP network 103 may be the Internet, a private IP network, or other data networks.
  • the network device 101 provides services to the terminals 102 within the coverage.
  • the network device 101 provides wireless access to one or more terminals 102 within the coverage of the network device 101.
  • the communication system 100 may include multiple network devices, for example, network devices 101'. There may be overlapping areas in coverage between network devices, for example, there may be overlapping areas in coverage between network device 101 and network device 101'. Network devices can also communicate with each other. For example, network device 101 can communicate with network device 101'.
  • the network device 101 is a node in a radio access network (radio access network, RAN), and may also be called a base station, and may also be called a RAN node (or device).
  • some examples of network equipment 101 are: general base station (general node B, gNB), new air interface base station (new radio node B, NR-NB), transmission and reception point (transmission reception point, TRP), evolved node B (evolved Node B, eNB), radio network controller (radio network controller, RNC), Node B (Node B, NB), base station controller (base controller), base station transceiver (BSC), base transceiver station (base transceiver station, BTS) , A home base station (eg, home evolved NodeB, HeNB; or home Node B, HNB), baseband unit (BBU), or wireless fidelity (Wifi) access point (AP), Or 5G communication system or network side equipment in future possible communication system, etc.
  • general base station general node B, g
  • Terminal 102 also known as user equipment (UE), mobile station (MS), mobile terminal (MT), etc., is a device that provides voice or data connectivity to users. It can be an IoT device.
  • the terminal 102 includes a handheld device having a wireless connection function, an in-vehicle device, and the like.
  • the terminal 102 may be: a mobile phone (mobile phone), a tablet computer, a laptop computer, a palmtop computer, a mobile internet device (mobile internet device, MID), a wearable device (such as a smart watch, smart bracelet, pedometer, etc.) , In-vehicle equipment (for example, cars, bicycles, electric vehicles, aircraft, ships, trains, high-speed rail, etc.), virtual reality (virtual reality, VR) equipment, augmented reality (augmented reality, AR) equipment, industrial control (industrial control) Wireless terminals, smart home devices (for example, refrigerators, TVs, air conditioners, electric meters, etc.), smart robots, workshop equipment, wireless terminals in self-driving (self driving), wireless terminals in remote surgery (remote medical), Wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, or wireless terminals in smart homes, flying equipment (for example, Intelligent robots, hot air balloons, drones, airplanes, etc.
  • In-vehicle equipment for example
  • the data channel in NR adopts pi/2-BPSK modulation and adopts DFT-s-OFDM waveform, which can obtain lower PAPR and has stronger applicability.
  • high frequency bands such as the frequency bands above 52.6 GHz
  • the performance of the power amplifier is poor and the output power is lower, so a low PAPR waveform is more necessary.
  • this application has designed a design to enhance the reference signal, which helps to close or equal the PAPR of the reference signal to the data channel at pi/2- PAPR of DFT-s-OFDM waveform under BPSK modulation.
  • DFT-s-OFDM waveform is a single carrier waveform
  • the solution designed in this application can be applied to other single carrier waveforms.
  • UW-DFT-s-OFDM, ZT-DFT-s-OFDM waveform or time-domain shaped single carrier waveform For example, UW-DFT-s-OFDM, ZT-DFT-s-OFDM waveform or time-domain shaped single carrier waveform.
  • the solution involved in this application is not only applicable to uplink transmission, but also applicable to downlink transmission.
  • Part or all of the reference signal transmission method provided by the embodiments of the present application may be executed by a network device, or may also be executed by a terminal.
  • the execution subject is described with the first device and the second device.
  • the first device is a network device
  • the second device is a terminal; or, when the first device is a terminal, the second device is a network device.
  • the basic idea of this application is to select a sub-sequence from a mother sequence, the length of the sub-sequence is the length of the reference signal, and the sub-sequence is the reference signal sequence.
  • the sub-sequence is processed to obtain a reference signal, which is then multiplexed with the data channel, and the multiplexed signal is transmitted.
  • the detailed process is as follows.
  • the mother sequence is represented by the first sequence
  • the child sequence is represented by the second sequence.
  • the reference signal can be exemplified by DMRS.
  • the first device determines the second sequence d[n].
  • the second sequence is represented by d[n], and the length of d[n] is N.
  • N and K are positive integers. K ⁇ N, under normal circumstances, K is much greater than N.
  • the method for obtaining d[n] from c[m] can be referred to formula (1).
  • the formula (1) can be illustrated in FIG. 3, from the first sequence, a bar with a length of N slides from the left to generate a second sequence. The distance between the initial value of the bar after sliding and the initial value of the first sequence is the initial shift value n 0 . It can be seen that the second sequence can be determined by the first sequence and the initial shift value n 0 . When the first sequence is determined, a different second sequence can be obtained by setting different n 0 .
  • the first device processes the second sequence to obtain a reference signal.
  • the first device multiplexes the reference signal and the data channel.
  • the first device sends the multiplexed signal to the second device.
  • the first sequence is a Gold sequence.
  • the DMRS sequence length N in NR is related to the bandwidth used by the data channel.
  • the bandwidth used by the data channel is different, and the sequence length required by the DMRS is also different.
  • the physical uplink/downlink shared channel (physical uplink/downlink shared channel, PUSCH/PDSCH) generally occupies a bandwidth of T resource blocks (RB), and 1 RB includes 12 subcarriers.
  • the number of subcarriers occupied by the data channel is 12T, and T is a positive integer.
  • type 1 (type 1) DMRS configuration resource elements (resources, REs) occupied by DMRS are arranged in a comb shape in the frequency domain, and the comb teeth are 2, and the frequency domain pattern is shown in FIG. 4.
  • the DMRS can be arranged at position 0 or position 1.
  • the DMRS can also adopt other configurations, and the length of the DMRS can also be other lengths, for example, 2T, 3T, or 12T.
  • the second sequence is obtained from the first sequence in order to match the length of the reference signal sequence. Because the length of the first sequence and the length of the second sequence are generally not equal. For example, the typical length of the Gold sequence is 2 ⁇ q-1, and the value is an odd number, which cannot be equal to 6*T.
  • Initialization parameter is The random sequence c[m] is determined by the initialization parameter c init , that is, the gold sequence can be obtained by knowing c init .
  • the first sequence may be a binary sequence, such as ⁇ 0, 1 ⁇ ; the first sequence may also be a ternary sequence, such as ⁇ 0, 1, -1 ⁇ .
  • the second sequence obtained in S201 is also a binary sequence.
  • the first device performs pi/2-BPSK modulation on the second sequence d[n] to obtain a time domain reference signal sequence t[n] of length N.
  • the second sequence obtained in S201 is also a ternary sequence.
  • the first device performs memory phase modulation on the second sequence d[n] to obtain a time domain reference signal sequence t[n] of length N.
  • t[0] is exp(-j*theta0*d[0]), where theta0 is the initial phase and j is the imaginary symbol, ie
  • t[n] t[n-1]*exp(-j*theta1*d[n]), where theta1 is the conversion unit phase.
  • phase theta0*d[0] has no effect on PAPR and frequency domain flatness, so the product of the two can be any value.
  • a possible design (designated as design 1), after obtaining the time-domain reference signal sequence t[n], perform a DFT transform on t[n] to obtain the frequency-domain reference signal sequence f[n], and further obtain the reference signal .
  • the reference signal and the data channel are multiplexed, and the multiplexed signal is transmitted after performing a series of processes.
  • the series of processing may include frequency domain resource mapping, inverse fast Fourier transform (IFFT), adding cyclic prefix (CP), digital-to-analog converter (DAC), etc.
  • the method for obtaining the time-domain reference signal sequence t[n] may include the above two modulation and/or processing methods.
  • the reference signal obtained by the time domain reference signal sequence t[n] is multiplexed with the data channel, and
  • the multiplexed signal is sent after a series of processing.
  • the series of processing here may include performing DFT transformation, frequency domain resource mapping, IFFT, adding CP or DAC, etc. on the multiplexed signal.
  • the method for obtaining the time-domain reference signal sequence t[n] may include the above two modulation methods.
  • the encoded data bits are modulated, then DFT transformed, multiplexed with the reference signal sequence after DFT transformation, and then transmitted after frequency domain resource mapping, IFFT, adding CP and DAC.
  • the encoded data bits are modulated, multiplexed with the reference signal sequence, and then multiplexed and then sent through DFT transform, frequency domain resource mapping, IFFT, adding CP and DAC.
  • the reference signal sequence in the time domain is obtained first, and the reference signal sequence in the frequency domain is obtained after the time-frequency domain conversion, and the reference signal is generated and transmitted.
  • the reference signal sequence in the time domain is easier to meet the requirements of low PAPR.
  • the above uses pi/2-BPSK modulation on the binary sequence ⁇ 0,1 ⁇ reference signal sequence to obtain the same PAPR as the data using pi/2-BPSK modulation.
  • the present application bases on selecting some existing sequences such as Gold sequences In order to design a method that can obtain sequences with better flat performance in the frequency domain.
  • the specific method is as follows.
  • the second sequence is determined by the first sequence (mother sequence) and the initial shift value.
  • a set of sequences in the frequency domain that are flat can be searched by computer.
  • the search optimization criterion is not limited in this application. For example, the criterion of maximizing the lowest power in the frequency domain can be used for searching.
  • the search may be performed in a manner of fixing the first sequence and transforming the initial shift, or in a manner of transforming both the first sequence and the initial shift. For different lengths N, search is performed.
  • there are several candidate sequences and several candidate initial shift values for example, there are M candidate sequences, there are 0 candidate initial shift values, and M and O are positive integers.
  • the network device selects the first sequence c[m] from the M candidate sequences, and selects the initial shift value n0 from the O candidate initial shift values.
  • the network device sends the information of the selected first sequence c[m] and the information of selecting the initial shift value n0 to the terminal.
  • the first device performs the operations of the network device described above; when the first device is a terminal and the second device is a network device, the first A device performs the operation of the above terminal.
  • the information of c[m] is any information that can determine c[m].
  • c[m] is the Gold sequence.
  • the Gold random sequence c[m] is determined by the initialization parameter c init , then the information of c[m] may be the initialization parameter c init .
  • the terminal may determine the first sequence c[m] according to the initialization parameter c init .
  • the value range of c init is 0,1,2,...,2 31 -1.
  • the network device notifies c init directly to the terminal.
  • the network device notifies the terminal of a parameter, and the terminal infers c init through this parameter and the rules defined by the protocol.
  • the range of c init that can be notified by the network device is smaller than its possible maximum value range.
  • the range of values of c init or c1 that can be notified by the network device is 0,1,2,...,Z1, where Z1 ⁇ 2 31 -1.
  • the information of the initial shift value n 0 is used to indicate the initial shift value n 0 .
  • the network device directly indicates the value of n 0, where n is in the range 0 0,1,2, ..., K-1, wherein K is c [m] in length.
  • the range of n 0 that can be notified by the network device is smaller than its possible maximum value range.
  • the range of values of n 0 that can be notified by the network device is 0,1,2,...,K1, where K1 ⁇ K .
  • n 0 may be a fixed value, such as 0, that is, the network device and/or protocol selects the DMRS sequence only through initialization parameters.
  • the network device when the length of the second sequence is different, notifies the terminal of different first sequence information and initial shift value information.
  • the network device notifies the information of the corresponding first sequence and initial shift value under several N values.
  • the value of notification N may be 36, 48, 60, or 72.
  • the value of N is limited because the number of allocable PRBs in the DFT-s-OFDM waveform in NR needs to be equal to 2 ⁇ 2 *3 ⁇ 3 *5 ⁇ 5 .
  • N 120
  • the network device does not configure the corresponding first sequence information and initial shift value information.
  • the terminal does not expect to be configured with DFT-s-OFDM waveform and pi/2-BPSK modulation when scheduling 20RB; 2.
  • the terminal assumes that the DMRS sequence uses the ZC sequence or the remaining sequences .
  • the information of the first sequence and the information of the initial shift value may be notified by the network device through RRC or MAC CE signaling.
  • the terminal uses the existing ZC sequence as the DMRS sequence before receiving the above configuration.
  • the initialization parameters and the initial shift configuration method of the present invention are specifically described below in combination with the initialization parameters of NR's existing DMRS.
  • the initialization parameters of DMRS are:
  • n SCID Represents the number of symbols in a time slot, Is the slot number in the wireless frame, l is the symbol number in OFDM, n SCID ⁇ 0,1 ⁇ , the specific value of n SCID is determined by the format of downlink control information (DCI) and/or DCI content .
  • DCI downlink control information
  • ( ⁇ ) mod2 31 is the modulus operation, which is the same as the above Equivalent.
  • existing DMRS sequences can be configured by RRC signaling as part of the initialization parameters (i.e.
  • the initialization parameters also include time slots and symbol numbers, the initialization parameters change at different times. If the existing initialization parameter generation method is applied to pi/2-BPSK time-domain DMRS generation, the DMRS sequence is different at different times, and the DMRS sequence at some times has poor frequency domain flatness, resulting in degradation of demodulation performance .
  • the initialization parameters do not include the slot number and the symbol number, so the network device can select a sequence with better performance, and send the initialization parameter or a part of the initialization parameter to the terminal, the initialization parameter It can also be associated with the physical cell ID, so that different cells can be configured with initialization parameters, so as to achieve the purpose of randomizing interference.
  • DMRS sequences of different lengths there are the following options, which are all achieved through configuration or through protocol definition: 1. DMRS sequences of different lengths are configured with different initialization parameters, and the initial shift value is the same; 2. DMRS sequences of different lengths are configured the same Initialization parameters, different initial shift values; 3. DMRS sequences of different lengths are configured with different initialization parameters and different initial shift values.
  • Each possible second sequence is determined by the information of a first sequence c[m] and the information of the initial shift value n 0 , and the L possible second sequences are indexed by sequence numbers.
  • the L possible second sequences are determined in advance, and are specified by the protocol or configured by the network device for the terminal. If the L possible sequences are configured by the network device, the configuration process is as shown above. In this way, both the network device and the terminal can determine the sequence number first, and obtain the indexed first sequence c[m] and the initial shift value n 0 according to the sequence number.
  • the L first sequences c[m] and the L initial shift values n 0 have a one-to-one correspondence.
  • the relationship between the sequence number, c[m] and n 0 can be shown in Table 1.
  • the sequence number is represented by 0, ..., L
  • the information of the first sequence c[m] is represented by X(0), ..., X(L-1)
  • the information of the initial shift n 0 is represented by n 0 (0) , ..., n 0 (L-1).
  • the table may also include some other optional parameters related to the sequence, expressed as Y(0), ..., Y (L-1).
  • first sequences c[m] and 30 initial shift values n 0 have a one-to-one correspondence, and the relationship between sequence number, c[m] and n 0 can be This is shown in Table 2.
  • the sequence number is represented by 0, ..., L
  • the information of the first sequence c[m] is the initialization parameter c init of c[m].
  • the 30 pieces of c[m] information are represented by X(0), ..., X29), and the 30 pieces of initial shift n 0 information are represented by n 0 (0), ..., n 0 (29).
  • the table may also include some other optional parameters related to the sequence, represented by Y(0), ..., Y(29).
  • Table 1 and Table 2 show the sequence parameters under a bandwidth or a reference signal sequence length.
  • the sequence parameters at multiple bandwidths or multiple reference signal sequence lengths can also be reflected in one table, or the sequence parameters at multiple bandwidths or multiple reference signal sequence lengths can be reflected in multiple tables.
  • the terminal When the terminal has the capability of supporting the reference signal sequence involved in this application, the terminal reports the capability to the network device, and the network device determines whether the terminal supports this capability according to the report of the terminal.
  • the terminal uses the second sequence to perform DMRS transmission of PUSCH or PUCCH.
  • the terminal uses the second sequence to perform DMRS reception of the PDSCH or PDCCH.
  • DMRS demodulation reference signal
  • CSI-RS channel state information reference signal
  • the first device multiplexes the reference signal and the data channel.
  • this application also designs a multiplexing method.
  • the reference signal symbol and the data modulation symbol are independent symbols.
  • the load of the data channel is small enough to support the transmission of one time slot.
  • the data volume of the terminal supports only 1 or 2 symbols.
  • the terminal's data volume supports 1 symbol, the data cannot be transmitted; when the terminal's data volume supports 2 symbols, 1 symbol is a reference signal symbol and 1 symbol is a data modulation symbol, a separate reference signal will cause Excessive overhead.
  • this application relates to a multiplexing method of a data channel and a reference signal in a single symbol.
  • the single symbol may be referred to as a single OFDM or DFT-s-OFDM symbol.
  • the single OFDM or DFT-s-OFDM symbol contains both the reference signal symbol and the data modulation symbol.
  • the reference signal may be DMRS, and the DMRS symbol may be understood as self-contained DMRS (self-contained DMRS).
  • This multiplexing method is applicable to the design 2 above, that is, the process of multiplexing before DFT transformation. Optionally, refer to the flow in FIG. 6b.
  • this application also designs a receiver solution.
  • the receiver demaps the reference signal before the FFT, and then performs the FFT independently. After FFT, channel estimation, equalization, and inverse discrete Fourier transform (IDFT) are performed.
  • IDFT inverse discrete Fourier transform
  • the reference signal length of design 2 is 1/2 m of the length of an OFDM or DFT-s-OFDM symbol, and m is a non-negative integer.
  • the reference signal length of design 2 is 1/2, 1/4, 1/8 equivalent of the length of an OFDM or DFT-s-OFDM symbol.
  • neither the reference signal length nor the OFDM or DFT-s-OFDM symbol length includes the CP length.
  • the length of the reference signal is Nsc/2 m before DFT.
  • the reference signal The length can be 600 or 300. It should be noted that the length of the above reference signal does not include the possible prefix or suffix length.
  • the FFT length of the data is 2048
  • the length of the reference signal is 1/4 of the length of one OFDM symbol
  • the FFT length of the reference signal is 512.
  • the reference signal of design 2 may have a prefix and/or a suffix of the sequence, as shown in FIG. 7.
  • the length of the prefix and/or suffix may not be fixed, for example, there may be multiple options, and the upper node configures one of the lengths.
  • the terminal reports the required prefix and/or suffix length, and the network device configures the prefix and suffix length according to the reported value.
  • the prefix and suffix include cyclic prefix and cyclic suffix.
  • an embodiment of the present application further provides a reference signal transmission device 900.
  • the reference signal transmission device 900 can be applied to the communication system shown in FIG. 1 to execute the above method The function of the first device in the embodiment.
  • the reference signal transmission device 900 is applied to the terminal or the terminal;
  • the reference signal transmission device 900 is applied to the network device or the network device.
  • the reference signal transmission device 900 includes a processing unit 901 and a transmission unit 902.
  • the processing unit 901 is used to determine the second sequence d[n], and also used to process the second sequence to obtain a reference signal, and to multiplex the reference signal and the data channel.
  • the sending unit 902 is configured to send the signal multiplexed by the processing unit 901 to the second device.
  • the processing unit 901 is also used to determine the information of the first sequence c[m] and the information of n 0 .
  • the processing unit 901 is specifically configured to determine the second sequence d[n] based on the information of the first sequence c[m] and the information of n 0 .
  • the processing unit 901 is also used to determine a sequence number (which may be referred to as a number for short), and determine the first sequence c[m] and n 0 indexed by the sequence number.
  • the sending unit 902 is further configured to send the first sequence of c[m] information and n 0 information to the second device; or, the first The device sends the first sequence of c[m] information to the second device; or, the first device sends numbered information to the second device, where the number is used to indicate the first sequence c[m] information and n 0 information.
  • the processing unit 901 selects the first sequence c[m] from the M candidate sequences, and selects n 0 from the O candidate initial shift values, M and O are positive integers; the sending unit 902 converts the first sequence c[ The information of m] and the information of n 0 are sent to the second device.
  • the reference signal transmission device 900 When the reference signal transmission device 900 is a terminal and the second device is a network device, the reference signal transmission device further includes: a receiving unit 903, configured to receive the first sequence c[m] information and n 0 from the second device Information; or, the first device receives the first sequence c[m] information from the second device; or, the first device receives the numbered information from the second device, the number is used to indicate the first sequence c[m] information And n 0 information.
  • a receiving unit 903 configured to receive the first sequence c[m] information and n 0 from the second device Information
  • the first device receives the first sequence c[m] information from the second device
  • the first device receives the numbered information from the second device, the number is used to indicate the first sequence c[m] information And n 0 information.
  • the processing unit 901 is also used to carry data modulation symbols and reference signals in OFDM symbols.
  • an embodiment of the present application further provides a reference signal transmission device 1000.
  • the communication device 1000 includes a transceiver 1001, a processor 1002, and a memory 1003.
  • the memory 1003 is optional.
  • the memory 1003 is used to store programs executed by the processor 1002.
  • the processor 1002 is used to call a group of programs, and when the program is executed, the processor 1002 is caused to execute the first device in the above method embodiment The operation performed.
  • the functional module sending unit 902 and receiving unit 903 in FIG. 9 may be implemented by the transceiver 1001, and the processing unit 901 may be implemented by the processor 1002.
  • the processor 1002 may be a central processing unit (CPU), a network processor (NP), or a combination of CPU and NP.
  • CPU central processing unit
  • NP network processor
  • the processor 1002 may further include a hardware chip.
  • the hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof.
  • the PLD may be a complex programmable logic device (complex programmable logic device, CPLD), a field programmable gate array (field-programmable gate array, FPGA), a general array logic (generic array logic, GAL), or any combination thereof.
  • the memory 1003 may include volatile memory (volatile memory), such as random-access memory (RAM); the memory 1003 may also include non-volatile memory (non-volatile memory), such as flash memory (flash) memory), hard disk drive (HDD) or solid-state drive (SSD); the memory 1003 may also include a combination of the aforementioned types of memory.
  • volatile memory volatile memory
  • non-volatile memory non-volatile memory
  • flash flash memory
  • HDD hard disk drive
  • SSD solid-state drive
  • the memory 1003 may also include a combination of the aforementioned types of memory.
  • part or all of the operations and functions performed by the first device and the second device described may be implemented by a chip or an integrated circuit.
  • an embodiment of the present application further provides a chip, including a processor, for supporting the reference signal transmission device 900 and the reference signal transmission device 1000 to implement the above implementation Examples of the functions involved in the terminal and network equipment in the method provided.
  • the chip is connected to a memory or the chip includes a memory, which is used to store necessary program instructions and data of the device.
  • An embodiment of the present application provides a computer storage medium that stores a computer program, and the computer program includes instructions for executing the reference signal transmission method provided by the foregoing embodiment.
  • An embodiment of the present application provides a computer program product containing instructions, which when run on a computer, causes the computer to execute the reference signal transmission method provided by the foregoing embodiment.
  • the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Moreover, the present application may take the form of a computer program product implemented on one or more computer usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.
  • computer usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions may also be stored in a computer readable memory that can guide a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, the instructions
  • the device implements the functions specified in one block or multiple blocks of the flowchart one flow or multiple flows and/or block diagrams.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operating steps are performed on the computer or other programmable device to produce computer-implemented processing, which is executed on the computer or other programmable device
  • the instructions provide steps for implementing the functions specified in one block or multiple blocks of the flowchart one flow or multiple flows and/or block diagrams.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

L'invention concerne un procédé et un dispositif d'émission d'un signal de référence permettant de réduire le PAPR d'un signal de référence. Le procédé comprend les étapes au cours desquelles : un premier dispositif détermine une seconde séquence d[n], d[n]＝c[<n+n 0> K], n＝0, 1 , ..., N-1, n 0 étant une valeur de décalage initiale, <n+n 0> K représentant n+n 0 mod K, n 0 étant un entier non négatif, c[m] étant une première séquence, m=0, 1, ..., K-1, K≥N, N et K étant des entiers positifs ; le premier dispositif traite la seconde séquence de façon à obtenir un signal de référence ; puis le premier dispositif multiplexe le signal de référence et un canal de données et transmet le signal de référence multiplexé au second dispositif.
PCT/CN2019/121750 2018-12-07 2019-11-28 Procédé et dispositif d'émission d'un signal de référence WO2020114317A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102437987A (zh) * 2010-09-29 2012-05-02 中兴通讯股份有限公司 信道状态信息参考信号序列的生成和映射方法及装置
WO2018060969A1 (fr) * 2016-09-30 2018-04-05 Telefonaktiebolaget Lm Ericsson (Publ) Séquences de signaux de référence de démodulation (dmrs) de liaison montante efficaces en puissance et en ressources pour accès multiple par répartition en fréquence entrelacée (ifdma)
CN108289018A (zh) * 2017-01-09 2018-07-17 华为技术有限公司 一种传输参考信号的方法以及设备
US20180323892A1 (en) * 2017-05-04 2018-11-08 Qualcomm Incorporated Radio single symbol design via frequency division multiplexing of reference signals and data tones

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102300313B (zh) * 2010-06-28 2013-03-27 华为技术有限公司 专用解调参考信号的资源配置方法和相关装置
CN102857325B (zh) * 2011-06-27 2017-08-04 华为技术有限公司 确定控制信道资源的方法和用户设备
CN103096389A (zh) * 2011-11-07 2013-05-08 华为技术有限公司 上行参考信号的发送方法、用户设备和基站
CN107615851B (zh) * 2015-08-14 2019-12-17 华为技术有限公司 上行控制信息的发送方法、接收方法、用户设备以及基站

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102437987A (zh) * 2010-09-29 2012-05-02 中兴通讯股份有限公司 信道状态信息参考信号序列的生成和映射方法及装置
WO2018060969A1 (fr) * 2016-09-30 2018-04-05 Telefonaktiebolaget Lm Ericsson (Publ) Séquences de signaux de référence de démodulation (dmrs) de liaison montante efficaces en puissance et en ressources pour accès multiple par répartition en fréquence entrelacée (ifdma)
CN108289018A (zh) * 2017-01-09 2018-07-17 华为技术有限公司 一种传输参考信号的方法以及设备
US20180323892A1 (en) * 2017-05-04 2018-11-08 Qualcomm Incorporated Radio single symbol design via frequency division multiplexing of reference signals and data tones

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