WO2022183979A1 - 同步信号传输方法、装置、设备及存储介质 - Google Patents

同步信号传输方法、装置、设备及存储介质 Download PDF

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Publication number
WO2022183979A1
WO2022183979A1 PCT/CN2022/077886 CN2022077886W WO2022183979A1 WO 2022183979 A1 WO2022183979 A1 WO 2022183979A1 CN 2022077886 W CN2022077886 W CN 2022077886W WO 2022183979 A1 WO2022183979 A1 WO 2022183979A1
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synchronization signal
signal sequence
signal transmission
sequence
synchronization
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French (fr)
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袁璞
刘昊
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Vivo Mobile Communication Co Ltd
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Vivo Mobile Communication Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/0091—Transmitter details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/0079—Receiver details

Definitions

  • the present application belongs to the field of communication technologies, and in particular relates to a synchronization signal transmission method, apparatus, device and storage medium.
  • the initial access of the terminal generally relies on the synchronization signal.
  • the synchronization technology is based on the orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) that is OFDM modulation and the New Radio (New Radio, NR) frame structure.
  • OFDM Orthogonal Frequency Division Multiplexing
  • NR New Radio
  • the device may need to frequently switch the modulation mode between the broadcast channel and the data channel, which increases the complexity of implementation; and the synchronization signal block (Synchronization signal block, Primary synchronization signal (PSS) in SSB)-secondary synchronization signal (SSS) binary structure and synchronization signal (synchronization signal, SS) coupled with the main message block (Master information block, MIB)
  • PSS Primary synchronization signal
  • SSS Secondary synchronization signal
  • MIB main message block
  • the purpose of the embodiments of the present application is to provide a synchronization signal transmission method, apparatus, device and storage medium, which can simplify the synchronization detection step on the receiving side after the synchronization signal is transmitted.
  • a synchronization signal transmission method comprising:
  • the first communication device generates a synchronization signal sequence mapped in the delayed Doppler domain
  • the first communication device transmits the time domain sampling points of the synchronization signal sequence.
  • a synchronization signal transmission method comprising:
  • the second communication device receives the time domain sampling points of the synchronization signal sequence
  • the second communication device performs synchronization timing detection on the time domain sampling points of the synchronization signal sequence.
  • a synchronization signal transmission device comprising:
  • a first generation module configured to generate a synchronization signal sequence mapped in the delayed Doppler domain
  • the first transmission module is configured to transmit the time domain sampling points of the synchronization signal sequence.
  • a synchronization signal transmission device comprising:
  • a first receiving module configured to receive the time domain sampling points of the synchronization signal sequence
  • the first detection module is configured to perform synchronization timing detection on the time domain sampling points of the synchronization signal sequence.
  • a communication device comprising a processor, a memory, and a program or instruction stored on the memory and executable on the processor, the program or instruction being implemented when executed by the processor The steps of the method of the first aspect.
  • a communication device comprising a processor, a memory, and a program or instruction stored on the memory and executable on the processor, the program or instruction being implemented when executed by the processor The steps of the method of the second aspect.
  • a readable storage medium is provided, and a program or an instruction is stored on the readable storage medium, and when the program or instruction is executed by a processor, the steps of the method described in the first aspect, or the The steps of the method of the second aspect.
  • a chip in an eighth aspect, includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is configured to run a program or an instruction to implement the method according to the first aspect steps, or steps of implementing the method according to the second aspect.
  • the synchronization signal sequence as the synchronization signal for transmission in the delayed Doppler domain, the good autocorrelation and cross-correlation performance of the synchronization signal is maintained, and the synchronization detection step on the receiving side is simplified, which is suitable for simplified OTFS
  • the engineering implementation avoids the additional complexity caused by inserting synchronization signals in the time-frequency domain.
  • FIG. 1 shows a block diagram of a wireless communication system to which an embodiment of the present application can be applied
  • 2 is a schematic diagram of the mutual conversion between the delay Doppler domain and the time-frequency plane provided by an embodiment of the present application;
  • FIG. 3 is a schematic diagram of a channel response relationship under different planes provided by an embodiment of the present application.
  • FIG. 4 is a schematic diagram of a process flow diagram of a transceiver end of an OTFS multi-carrier system provided by an embodiment of the present application;
  • 5 is a schematic diagram of pilot resource multiplexing in the delayed Doppler domain provided by an embodiment of the present application.
  • FIG. 6 is a schematic diagram of detection of a pilot sequence provided by an embodiment of the present application.
  • FIG. 7 is a schematic diagram of a synchronization signal design provided by an embodiment of the present application.
  • FIG. 8 is one of the schematic flowcharts of the synchronization signal transmission method provided by the embodiment of the present application.
  • FIG. 9 is a schematic diagram of the engineering implementation of the OTFS system provided by the embodiment of the present application;
  • FIG. 10 is a schematic diagram of transforming a delayed Doppler-domain sequence into a time-domain sampling point provided by an embodiment of the present application;
  • 11 is a schematic diagram of pilot overhead provided by the implementation of the present application.
  • FIG. 12 is a second schematic flowchart of a synchronization signal transmission method provided by an embodiment of the present application.
  • FIG. 13 is one of the schematic structural diagrams of the synchronization signal transmission apparatus provided by the embodiment of the present application.
  • FIG. 14 is a second schematic structural diagram of a synchronization signal transmission apparatus provided by an embodiment of the present application.
  • FIG. 15 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • 16 is a schematic diagram of a hardware structure of a terminal provided by an embodiment of the present application.
  • FIG. 17 is a schematic diagram of a hardware structure of a network side device provided by an embodiment of the present application.
  • first, second and the like in the description and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances so that the embodiments of the present application can be practiced in sequences other than those illustrated or described herein, and "first”, “second” distinguishes Usually it is a class, and the number of objects is not limited.
  • the first object may be one or multiple.
  • “and/or” in the description and claims indicates at least one of the connected objects, and the character “/" generally indicates that the associated objects are in an "or” relationship.
  • LTE Long Term Evolution
  • LTE-Advanced LTE-Advanced
  • LTE-A Long Term Evolution
  • CDMA Code Division Multiple Access
  • TDMA Time Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • OFDMA Orthogonal Frequency Division Multiple Access
  • SC-FDMA Single-carrier Frequency-Division Multiple Access
  • system and “network” in the embodiments of the present application are often used interchangeably, and the described technology can be used not only for the above-mentioned systems and radio technologies, but also for other systems and radio technologies.
  • NR New Radio
  • the following description describes a New Radio (NR) system for example purposes, and uses NR terminology in most of the description below, but these techniques can also be applied to applications other than NR system applications, such as 6th Generation (6th Generation) , 6G) communication system.
  • 6th Generation 6th Generation
  • 6G 6th Generation
  • FIG. 1 shows a block diagram of a wireless communication system to which the embodiments of the present application can be applied.
  • the wireless communication system includes a terminal 11 and a network-side device 12 .
  • the terminal 11 may also be referred to as a terminal device or a user terminal (User Equipment, UE), and the terminal 11 may be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer) or a notebook computer, a personal digital Assistant (Personal Digital Assistant, PDA), PDA, Netbook, Ultra-mobile Personal Computer (UMPC), Mobile Internet Device (MID), Augmented Reality (AR)/Virtual Reality (virtual reality, VR) device, robot, wearable device (Wearable Device), vehicle-mounted device (VUE), pedestrian terminal (PUE), smart home (home devices with wireless communication functions, such as refrigerators, TVs, washing machines or furniture etc.), game consoles, personal computers (PCs), teller machines or self-service machines and other terminal-side devices, wearable devices include: smart watches
  • the network side device 12 may include an access network device or a core network device, wherein the access network device 12 may also be referred to as a radio access network device, a radio access network (Radio Access Network, RAN), a radio access network function or Radio access network unit.
  • the access network device 12 may include a base station, a WLAN access point, or a WiFi node, etc., and the base station may be referred to as a Node B, an evolved Node B, an access point, a Base Transceiver Station (BTS), a radio base station, a radio base station, or a radio base station.
  • BTS Base Transceiver Station
  • the base station is not limited to specific technical vocabulary. It should be noted that, in the embodiments of this application, only the base station in the NR system is used as an example, but it does not limit the base station. specific type.
  • the core network equipment may include, but is not limited to, at least one of the following: core network node, core network function, mobility management entity (Mobility Management Entity, MME), access mobility management function (Access and Mobility Management Function, AMF), session management function (Session Management Function, SMF), User Plane Function (UPF), Policy Control Function (Policy Control Function, PCF), Policy and Charging Rules Function (Policy and Charging Rules Function, PCRF), edge application services Discovery function (Edge Application Server Discovery Function, EASDF), Unified Data Management (Unified Data Management, UDM), Unified Data Repository (Unified Data Repository, UDR), Home Subscriber Server (Home Subscriber Server, HSS), centralized network configuration ( Centralized network configuration, CNC), Network Repository Function (NRF), Network Exposure Function (NEF), Local NEF (Local NEF, or L-NEF), Binding Support Function (Binding Support Function, BSF), Application Function (AF), etc. It should be noted that, in the embodiments of the present application, only the core
  • Downlink control message Downlink control information, DCI;
  • Physical downlink control channel Physical downlink control channel, PDCCH;
  • Physical downlink shared channel Physical downlink shared channel, PDSCH;
  • Radio resource control RRC
  • Physical broadcast channel Physical broadcast channel, Physical broadcast channel, PBCH;
  • Master message block Master information block, MIB;
  • SIB System message block, System information block, SIB;
  • Resource element Resource element, RE;
  • CDM Code division multiplexing, Code division multiplexing, CDM
  • Orthogonal cover code Orthogonal cover code, OCC
  • OFDM Orthogonal frequency division multiplexing
  • Bit error rate Bit error rate, BER
  • Bit error rate Block error rate, BLER
  • Synchronization signal block Synchronization signal block, Synchronization signal block, SSB;
  • Primary synchronization signal Primary synchronization signal, PSS;
  • Symplectic Fourier transform Symplectic Fourier transform, SFFT;
  • Inverse symplectic Fourier transform Inverse symplectic Fourier transform, ISFFT;
  • Linear feedback shift register Linear feedback shift register, LFSR.
  • ISI Inter-symbol interference
  • ICI Inter-carrier interference
  • OFDM Orthogonal Frequency Division Multiplexing
  • CP cyclic prefix
  • the Orthogonal Time Frequency Space (OTFS) technology is proposed to solve the above problems in the OFDM system.
  • the OTFS technique defines the transformation between the delay Doppler domain and the time-frequency domain.
  • the delay and Doppler characteristics of the channel are captured by designing pilots in the delayed Doppler domain, and the guard interval is designed to avoid OFDM.
  • the pilot contamination problem caused by the ICI in the system makes the channel estimation more accurate and helps the receiving end to improve the success rate of data decoding.
  • a guard interval is required around the pilot symbol located in the delayed Doppler domain, and the size of the guard interval is related to the channel characteristics.
  • the present application dynamically adjusts the size of the guard interval of the pilot symbol according to the channel characteristics, so as to ensure that the pilot overhead is approximately minimized under the premise of satisfying the system design, avoiding that the worst-case band is always considered in the traditional scheme. The problem of wasting resources.
  • the delay and Doppler characteristics of the channel are essentially determined by the multipath channel. Signals arriving at the receiver through different paths have different arrival times because of differences in propagation paths. For example, two echoes s 1 and s 2 respectively travel distances d 1 and d 2 to reach the receiving end, then the time difference between them arriving at the receiving end is:
  • the Doppler effect is due to the relative velocities at the two ends of the transceiver, and the signals arriving at the receiving end through different paths have different incident angles with respect to the antenna normal, thus causing the difference in relative velocities, which in turn causes the Doppler effects of signals on different paths.
  • the frequency shift is different. It is assumed that the original frequency of the signal is f 0 , the relative velocity of the transceiver is ⁇ v, and the angle between the signal and the normal incidence of the antenna at the receiving end is ⁇ . Then there are:
  • the signal received by the receiving end is the superposition of component signals with different time delays and Dopplers from different paths, and the whole is embodied as a received signal with fading and frequency shift relative to the original signal.
  • the delay Doppler analysis of the channel is helpful to collect the delay Doppler information of each path, so as to reflect the delay Doppler response of the channel.
  • OTFS modulation technology Orthogonal Time-Frequency Spatial Domain Modulation.
  • This technology logically maps the information in a data packet of size M ⁇ N, such as Quadrature Amplitude Modulation (QAM) symbols, to an M ⁇ N lattice point in the two-dimensional delay Doppler domain. , that is, the pulses within each lattice point modulate one QAM symbol in the packet.
  • QAM Quadrature Amplitude Modulation
  • FIG. 2 is a schematic diagram of the mutual conversion between the delayed Doppler domain and the time-frequency plane provided by an embodiment of the present application.
  • the M ⁇ N delayed Doppler domain is converted into
  • the data set on the plane is transformed to the N ⁇ M time-frequency domain plane, which is mathematically called the Inverse Sympetic Fast Fourier Transform (ISFFT).
  • ISFFT Inverse Sympetic Fast Fourier Transform
  • the transformation from the time-frequency domain to the delayed Doppler domain is called the Sympletic Fourier Transform.
  • the physical meaning behind it is that the delay and Doppler effect of the signal are actually a linear superposition effect of a series of echoes with different time and frequency offsets after the signal passes through multiple channels. In this sense, the delay Doppler analysis and the time-frequency domain analysis can be obtained by mutual conversion of the ISFFT and SSFT described above.
  • the OTFS technology transforms the time-varying multipath channel into a time-invariant two-dimensional delay Doppler domain channel (within a certain duration), which directly reflects the relative relationship between the reflectors between the transceivers in the wireless link.
  • the channel delay Doppler response characteristic caused by the geometry of the location.
  • the advantage of this is that OTFS eliminates the difficulty of tracking the time-varying fading characteristics of traditional time-frequency domain analysis, and instead extracts all the diversity characteristics of the time-frequency domain channel through delay Doppler domain analysis.
  • the channel impulse response matrix represented by the delayed Doppler domain is sparse because the number of delay paths and Doppler frequency shifts of the channel is much smaller than the number of time domain and frequency domain responses of the channel.
  • Using the OTFS technology to analyze the sparse channel matrix in the delay Doppler domain can make the packaging of reference signals more compact and flexible, which is especially beneficial to support large antenna arrays in massive MIMO systems.
  • the core of OTFS modulation is to define QAM symbols in the delayed Doppler domain, transform them into the time-frequency domain for transmission, and then return to the delayed Doppler domain for processing at the receiving end. Therefore, a wireless channel response analysis method in the delayed Doppler domain can be introduced.
  • FIG. 3 is a schematic diagram of the channel response relationship under different planes provided by an embodiment of the present application. As shown in FIG. 3 , when a signal passes through a linear time-varying wireless channel, the channel response is expressed under different planes. The relationship between.
  • Equation (6) implies that the analysis of the delay Doppler domain in the OTFS system can be realized by adding an additional signal processing process at the transceiver end by relying on the communication framework established in the time-frequency domain in the related art. Moreover, the additional signal processing only consists of Fourier transform, which can be completely implemented by hardware in the related art, without adding new modules. This good compatibility with the hardware system in the related art greatly facilitates the application of the OTFS system. In an actual system, the OTFS technology can be easily implemented as a pre- and post-processing module of a filtered OFDM system, so it has good compatibility with the multi-carrier system in the related art.
  • the implementation of the transmitting end is as follows: the QAM symbols containing the information to be transmitted are carried by the waveform of the delayed Doppler domain, and undergo a two-dimensional inverse symplectic Fourier transform (Inverse Sympletic Fast Finite Fourier Transform, ISFFT), converted to the waveform of the time-frequency domain plane in the traditional multi-carrier system, and then through the symbol-level one-dimensional inverse fast Fourier transform (Inverse Fast Fourier Transform, IFFT) and serial-parallel conversion, become time-domain sampling points send out.
  • ISFFT Inverse Sympletic Fast Finite Fourier Transform
  • IFFT inverse Fast Fourier Transform
  • serial-parallel conversion serial-parallel conversion
  • the receiving end of the OTFS system is roughly an inverse process of the sending end: after the time domain sampling points are received by the receiving end, they undergo parallel transformation and symbol-level one-dimensional Fast Fourier Transform (FFT), and then transform to the time
  • FFT Fast Fourier Transform
  • the waveform on the frequency domain plane is then converted into a waveform on the delayed Doppler domain plane through a two-dimensional symplectic Fourier transform (Sympletic Finite Fourier Transform, SFFT), and then the QAM symbols carried by the delayed Doppler domain waveform are processed.
  • Processing at the receiving end including but not limited to channel estimation and equalization, demodulation and decoding, etc.
  • FIG. 4 is a schematic diagram of a processing flow of a transceiver end of an OTFS multi-carrier system provided by an embodiment of the present application.
  • OTFS modulation converts a time-varying fading channel in the time-frequency domain between transceivers into a deterministic fading-free channel in the delay-Doppler domain.
  • each symbol in a set of information symbols sent at a time experiences the same static channel response and SNR.
  • the OTFS system analyzes the reflectors in the physical channel by delaying the Doppler image, and uses the receive equalizer to coherently combine the energy from different reflection paths, which actually provides a static channel response without fading.
  • the OTFS system does not need to introduce closed-loop channel adaptation to cope with the fast-changing channel like the OFDM system, thus improving the system robustness and reducing the complexity of system design.
  • the channel in the OTFS system can be expressed in a very compact form.
  • the channel estimation overhead of the OTFS system is less and more accurate.
  • OTFS Another advantage of OTFS is to deal with extreme Doppler channels. Through the analysis of delayed Doppler images with appropriate signal processing parameters, the Doppler characteristics of the channel will be fully presented, which is beneficial for signal analysis and processing in Doppler-sensitive scenarios such as high-speed movement and millimeter waves.
  • a new method can be adopted for channel estimation in the OTFS system.
  • the transmitter maps the pilot pulse on the delayed Doppler domain, and the receiver uses the delayed Doppler image analysis of the pilot to estimate the channel response h( ⁇ , ⁇ ) in the delayed Doppler domain, which can then be determined according to Fig.
  • the relationship shown in 3 obtains the channel response expression in the time-frequency domain, which is convenient for signal analysis and processing using the existing technology in the time-frequency domain.
  • FIG. 5 is a schematic diagram of multiplexing pilot resources in the delayed Doppler domain provided by an embodiment of the present application; as shown in FIG. 5 , the pilot is constructed based on a PN (persudo noise, pseudo-random) sequence generated in a specific manner.
  • the pilot sequence is mapped to the two-dimensional resource grid on the delayed Doppler plane according to specific rules, that is, the shaded part of the slanted line in the figure.
  • the resource position occupied by the pilot sequence that is, the shaded part with the oblique line, may be referred to as a pilot resource block.
  • the unshaded area next to the pilot resource block is the pilot guard band, which consists of blank resource elements that do not transmit any signal/data.
  • a guard band is also provided around its periphery to avoid mutual interference with data.
  • the calculation method of the guard band width is the same as that in the single-point pilot mapping mode in Figure 5. The difference is that in the resource part mapped by the pilot sequence, the pilot signals of different ports can be generated by selecting sequences with low correlation, superimposing and mapping on the same resource, and then performing the pilot sequence mapping at the receiving end through a specific algorithm. detection, thereby distinguishing pilots corresponding to different antenna ports. Due to complete resource multiplexing at the transmitting end, the pilot overhead in a multi-antenna port system can be greatly reduced.
  • FIG. 6 is a schematic diagram of detection of a pilot sequence provided by an embodiment of the present application.
  • a detection method based on a sequence pilot is presented.
  • the received pilot signal block is shifted to the diagonally shaded part in the figure (that is, the square marked with 2 and the The position of the 8 adjacent squares, and the square numbered 3 and the 8 adjacent squares).
  • the sliding window detection operation is performed in the delayed Doppler domain. It is known that the sliding window detection operation result M(R,S)[ ⁇ , ⁇ ] has the following properties when N P ⁇ + ⁇ (the probability that the following formula holds is close to 1):
  • the detection opportunity calculates an energy peak, which is presented in the delay Doppler domain. ( ⁇ 0 , ⁇ 0 ) position of , that is, the positions of the small squares labeled 2 and 3 in the figure.
  • the receiver can obtain the correct pilot position according to the value of M(R,S), that is, obtain the delay and Doppler information of the channel. At the same time, the amplitude value of the channel is obtained by the detection operation value is given.
  • a base sequence is generated.
  • the base sequence can be a ZC sequence or a PN sequence.
  • the PN sequence includes the following sequences: M sequence, Gold sequence, Kasami sequence, Barker sequence and so on.
  • the base sequence is modulated to generate a pilot sequence.
  • OCC can also be used for the pilot sequence to further improve the orthogonality.
  • FIG. 7 is a schematic diagram of a synchronization signal design provided by an embodiment of the present application.
  • the initial access of LTE and NR is performed by relying on synchronization signals (including PSS and SSS). to find frame boundaries (timing synchronization).
  • the SSS is the secondary synchronization signal, and indicates the Cell ID together with the PSS.
  • PBCH is a physical broadcast channel, in which MIB messages and DMRS transmit the most important part of system messages for subsequent random access and data transmission.
  • the system of initial access technology in NR is mainly based on the design of SSB.
  • the base station periodically transmits the SSB for initial access according to the principles set by the protocol (eg, time-frequency domain resource location, transmission period, synchronization signal generation method, etc.).
  • the main process is as follows:
  • Initial network search including SSB synchronization and reception of system information. Specifically, the primary synchronization information PSS may be received first, then the secondary synchronization information SSS may be received, and then the PBCH may be received: obtain the SSB index, and the information in the PBCH DMRS and MIB.
  • the above is the initial access procedure in the NR single base station cell.
  • the UE only accepts the SSB from the current cell, and obtains the system information by detecting the synchronization signals (including PSS and SSS) in the SSB, as well as the reference signal (DMRS) and data information (MIB) in the PBCH, so as to transmit the uplink message. Further random access.
  • the pilots (PSS and SSS) used for synchronization are tightly coupled with the data part (content in the PBCH) containing the system message.
  • the first thing to be done is the detection of the primary synchronization signal and the PSS, including:
  • the base station periodically sends the SSB for initial access according to the principles set by the protocol (such as time-frequency domain resource location, transmission period, synchronization signal generation method, etc.)
  • the UE Since the UE does not have a priori information on the frame timing boundary in the initial access stage, the UE needs to perform sliding window detection on the received time domain sampling points according to the SSB mapping and transmission rules defined by the protocol. Specifically:
  • the UE buffers a sufficiently long time domain sampling point.
  • the UE generates local time domain samples for detection according to the synchronization signal sequence determined by the protocol
  • the UE defines a sliding detection window, which slides sample by sample on the buffered time domain sample points. Each time a sample point is slid, a correlation operation is performed between the current buffered time-domain sample point in the sliding detection window and the local time-domain sample point to obtain a correlation peak value.
  • FIG. 8 is one of the schematic flowcharts of a synchronization signal transmission method provided by an embodiment of the present application. As shown in FIG. 8 , the method includes the following steps:
  • Step 800 the first communication device generates a synchronization signal sequence mapped in the delayed Doppler domain
  • Step 810 The first communication device transmits the time domain sampling points of the synchronization signal sequence.
  • the embodiments of the present application may be applied to the downlink
  • the first communication device may be a network side device, such as a base station, and in this case, its communication counterpart, that is, the second communication device may be a terminal UE.
  • the embodiment of the present application may be applied to a side link
  • the first communication device may be a terminal UE
  • its communication counterpart that is, the second communication device may be a terminal UE.
  • the first communication device may be referred to as a sending end
  • the second communication device may be referred to as a receiving end.
  • the first communication device may employ a sequence-based synchronization signal sequence for OTFS modulation.
  • the synchronization signal sequence is generated based on a sequence with good autocorrelation and cross-correlation performance.
  • the first communication device modulates the synchronization signal sequence, it can map it to the delay Doppler domain resource grid, and then convert the synchronization signal sequence from The delay Doppler domain is converted to the time domain for transmission.
  • the synchronization signal sequence is transmitted through pilot frames.
  • the second communication device that is, the receiving end, can directly detect the synchronization signal based on the received sampling points in the time domain, and obtain the synchronization timing without additional processing steps.
  • FIG. 9 is a schematic diagram of an engineering implementation of an OTFS system provided by an embodiment of the present application; as shown in FIG. 9 , the left half is a complete flow of OTFS baseband processing, and the right half is a simplified flow of OTFS baseband processing.
  • the data set X mapped on a 2048 ⁇ 128 delayed Doppler resource grid needs to undergo an ISFFT to transform to the time-frequency domain, where the ISFFT is performed by performing operations on the elements of each column. FFT of 2048 points and IFFT of 128 points for each row element. Obtain the dataset X TF in the time-frequency domain.
  • F N is the DFT operator in matrix form
  • the left multiplication represents the row-by-row DFT of the matrix
  • the right multiplication represents the column-by-column DFT of the matrix.
  • the X TF needs to be converted into time-domain sampling points for transmission, and the conversion process is the Heisenberg transform in Figure 9.
  • the specific operation is to perform an IFFT operation of 2048 points on each column of XTF , and then shape and filter column by column to obtain the processed matrix S. After the S is vectorized, the sent time domain sampling points are obtained.
  • the matrix expression for S is:
  • the embodiment of the present application proposes a synchronization signal design solution in the delayed Doppler domain in the OTFS modulation system, which is used for initial access of the UE.
  • the embodiments of the present application design a dedicated synchronization mechanism for OTFS modulation, so as to better utilize the advantages of the OTFS system.
  • the embodiment of the present application uses the synchronization signal sequence as the synchronization signal for transmission in the delayed Doppler domain, maintains good autocorrelation and cross-correlation performance of the synchronization signal, simplifies the synchronization detection step on the receiving side, and is suitable for simplified OTFS engineering implementation. The additional complexity of inserting synchronization signals in the time-frequency domain is avoided.
  • the generating and mapping the synchronization signal sequence in the delayed Doppler domain including:
  • a guard band is not reserved for the synchronization signal sequence on the resource grid of the delayed Doppler domain; or, a guard band is reserved for the synchronization signal sequence on the resource grid of the delayed Doppler domain.
  • the generating and mapping the synchronization signal sequence in the delayed Doppler domain including:
  • the synchronization signal sequence is only used for synchronization timing, that is, the pilot frame where the synchronization signal is located only contains pilots and is only used to find synchronization timing, that is, the receiving side does not need to use the pilots for (Delayed Doppler Domain) Channel Estimation. Therefore, there is no need to reserve a guard band for the mapping of the synchronization signal sequence.
  • guard band since the guard band does not need to be considered, more pilot symbols can be placed in the resource of the same size, thereby enhancing the detection performance; some additional information bits are carried by combining the pilot sequences.
  • the generating and mapping the synchronization signal sequence in the delayed Doppler domain including:
  • a guard band is reserved for the synchronization signal sequence on the resource grid of the delay Doppler domain.
  • the synchronization signal sequence is used for synchronization timing and for obtaining information related to channel quality
  • the pilot frame where the synchronization signal is located only contains pilots
  • both delay and Doppler dimensions are predicted.
  • Sufficient guardbands are reserved for channel estimation, providing a function similar to CSI-RS in NR.
  • channel estimation may be further performed to obtain the CSI.
  • the generating and mapping the synchronization signal sequence in the delayed Doppler domain including:
  • the pilot frame where the synchronization signal sequence is located includes a data signal
  • the resource elements and A guard band is reserved between resource elements to which the data signal is mapped.
  • the pilot frame where the synchronization signal sequence is located includes a data signal, that is, the pilot where the synchronization signal is located.
  • Frames contain both pilots and data (similar to system messages in SSB for NR).
  • channel estimation may be further performed to obtain the CSI. Then, according to the obtained CSI, demodulate the data part to obtain system information.
  • the receiving side can first detect the frame timing by using the pilot frequency (synchronization signal sequence), and then further use the pilot frequency to perform channel estimation in the delayed Doppler domain to demodulate the data part. Therefore, a guard band needs to be reserved between the pilot and the data, and the data is distributed in C delay taps and D Doppler taps.
  • the delay tap may refer to a delay tap, that is, the delay dimension coordinate of the delay Doppler resource grid.
  • the delay tap may refer to the delay dimension coordinates of some or all of the delayed Doppler resource grids under a Doppler dimension coordinate.
  • the pilot frame may carry multiple functions: obtain timing synchronization; obtain accurate CSI; and serve user data demodulation in subsequent time slots (using QCL relationship); be used for pilot resources in subsequent time slots Self-adaptive; after synchronizing the timing, the resource grid in the delayed Doppler domain is recovered, and the pilot frequency is used for channel estimation to demodulate the data in the frame.
  • the generating and mapping the synchronization signal sequence in the delayed Doppler domain including:
  • the synchronization signal sequence is mapped to the resource grid pattern of the delay Doppler domain.
  • the first communication device acquires the channel quality related information
  • it may be determined based on the channel quality related information that the synchronization signal sequence is mapped to a resource grid pattern in the delay Doppler domain.
  • the ISFFT operation in the OTFS baseband processing is equivalent to a two-dimensional spread spectrum operation performed on the signal by using the DFT operator, the number of samples carrying information is increased, thus increasing the complexity of detection at the receiving end. Therefore, according to the characteristics of OTFS baseband signal processing, by designing a special pattern pattern for signal mapping in the delayed Doppler domain, the effect of reducing the complexity of receiver sequencing sequence detection can be achieved, which is more conducive to the popularization and application of this technology.
  • a pilot sequence X may be defined on an M ⁇ N delayed Doppler plane for synchronization detection. Then the time-domain sampling point distribution containing the X sequence information has a corresponding relationship with the mapping of X on the delayed Doppler domain.
  • FIG. 10 is a schematic diagram of transforming a delayed Doppler domain sequence into a time domain sampling point provided by an embodiment of the present application. As shown in FIG. 10 , it is a transformation of transforming a delayed Doppler domain sequence into a time domain sampling point in two mapping modes. process.
  • the baseband processing process is to perform IFFT on the delayed Doppler domain data set row by row. Therefore, the pilot frequency X can be mapped row by row to the delayed Doppler domain plane with a size of M ⁇ N, that is, If it is only mapped to the row corresponding to a certain delay tap, after the transformation to the delay-time domain, there is only information of the pilot X on a certain delay tap, which is denoted as X dt , and the length of X dt is N.
  • X dt On the time-domain sampling points obtained after vectorization, X dt is evenly distributed on the transmission sampling points of MN ⁇ 1 according to a certain interval, as shown in the left side of Fig. 10 .
  • the second mapping method when the pilot frequency X is mapped on the delay Doppler plane by column, that is, only mapped to the column corresponding to a certain Doppler tap, after row-by-row IFFT, its information is extended to the delay- On all samples of multiple delay taps in the time domain, these samples are denoted as X dt .
  • the information of X is extended to all samples in M delay taps, that is, X dt is distributed on all time-domain sample points obtained after vectorization, and the length of X dt at this time for MN.
  • mapping mode 1 when mapping mode 1 is adopted, when the receiving side detects the number of received sample points, it only needs to extract a small number of sample points at appropriate positions for detection; and when mapping mode 2 is adopted, the receiving side needs to compare the number of samples. Multiple sample points for detection.
  • the mapping of the pilot frequency X in the delay Doppler domain only exists on Q delay taps
  • the number of samples to be detected by the receiving side is QN.
  • the sampling interval of the sampling points on the receiving side is M-Q.
  • the pilot frequency X can be mapped from the Pth delay tap, then X dt is in the MN ⁇ of the current time slot.
  • the starting position that occurs in 1 time domain sampling point is P.
  • the receiver side can obtain a priori information on the position of X dt at the receiving time domain sampling point, that is, the coordinate position of X dt in all time domain sampling points in the current time slot is: :
  • the overhead includes the overhead of the pilot sequence itself and the overhead of the guard band of the pilot sequence.
  • FIG. 11 is a schematic diagram of pilot overhead provided by the implementation of the present application. As shown in FIG. 11 , pilots can be mapped on a resource grid in the delayed Doppler domain in a rectangular pattern, and the resource grid only contains pilots and no data.
  • the total overhead of the pilot is:
  • the current optimal pilot mapping method can be determined, namely:
  • Q is the side length of the mapped resource block
  • the first communication device such as the base station has prior information of the channel, that is, ( ⁇ max , v max )
  • (A, B) may be determined first according to this, so as to calculate a better Q, and determine the derivative.
  • the mapping mode of the frequency signal may be determined first according to this, so as to calculate a better Q, and determine the derivative.
  • the first communication device is a base station
  • the base station has a priori information of the channel, namely ( ⁇ max , v max )
  • (A, B) can be determined first according to this, so as to calculate a better Q, Determine the mapping mode of the pilot signal.
  • the pilot frame only contains pilots and is only used to find synchronization timing, that is, the receiver side does not need to use the pilots to perform (delayed Doppler domain) channel estimation. Therefore, there is no need to reserve a guard band.
  • the design criteria of the pilot mapping scheme are:
  • the pilot frame for synchronization contains both pilot (synchronization signal sequence) and data (similar to the system message in SSB of NR).
  • the receiving side can use the pilot to detect the frame timing, and then further use the pilot to perform channel estimation in the delayed Doppler domain to demodulate the data part. Therefore, a guard band needs to be reserved between the pilot and the data, and the data is distributed in C delay taps and D Doppler taps. Accordingly, minimizing the pilot overhead is equivalent to solving the following minimization problem,
  • the determining, based on the channel quality-related information, that the synchronization signal sequence is mapped to a resource grid pattern in a delayed Doppler domain includes:
  • the synchronization signal sequence is mapped to a resource grid pattern in the delay Doppler domain;
  • a resource grid pattern in which the synchronization signal sequence is mapped to the delay Doppler domain is determined.
  • the first communication device may determine the The synchronization signal sequence is mapped to a resource grid pattern in the delayed Doppler domain.
  • the value of ( ⁇ max , v max ) measured by the k th synchronization pilot can be used to determine the size of the pilot guard band used for the k th to k+1 th pilot frames, that is, to calculate Q.
  • the first communication device may, based on the obtained at least two channel quality-related information, the largest one. Channel quality-related information, to determine the resource grid pattern in which the synchronization signal sequence is mapped to the delayed Doppler domain;
  • a maximum value may be taken from several groups ( ⁇ max , v max ) of consecutive multiple synchronization pilot measurements, and then based on the maximum value, the synchronization signal sequence may be mapped to a resource grid pattern in the delay Doppler domain, That is to calculate Q.
  • the first communication device may, based on the acquired average value of at least two channel quality-related information , and determine the resource grid pattern in which the synchronization signal sequence is mapped to the delay Doppler domain.
  • an average value may be taken in several groups ( ⁇ max , v max ) of consecutive multiple synchronization pilot measurements, and based on the average value, the resource grid pattern of the synchronization signal sequence mapped to the delay Doppler domain may be determined, that is, Calculate Q.
  • the signal quality-related information obtained after performing channel estimation based on pilots (such as synchronization signal sequences) one or more times can be used for pilot resource adaptation in subsequent time slots.
  • pilot mapping mode that is, using the maximum delay and the maximum Doppler information in the CSI information, namely ( ⁇ max , v max ), to determine the pilot frequency protection in the subsequent time slot belt pattern.
  • the guard tape mode may include the size of the guard tape, and may also include the shape of the guard tape.
  • the generating and mapping the synchronization signal sequence in the delayed Doppler domain including:
  • the synchronization signal sequence is mapped to the row corresponding to any delay tap on the resource grid of the delay Doppler domain.
  • the synchronization signal sequence is mapped to a row corresponding to any delay tap on the resource grid of the delay Doppler domain.
  • the base station when it does not have the prior information of the channel, it directly adopts the mapping mode 1 or the mapping mode 2 in FIG. 10 .
  • the first mapping method in FIG. 10 can be adopted, that is, the synchronization signal sequence is mapped to the row corresponding to any delay tap on the resource grid of the delay Doppler domain. superior.
  • the generating and mapping the synchronization signal sequence in the delayed Doppler domain including:
  • a synchronization signal sequence associated with the physical layer identity is generated.
  • the synchronization signal sequence can be generated based on the PN sequence
  • the synchronization signal sequence associated with the physical layer identifier may be generated based on a PN sequence, generated from a PN sequence, and associated with the physical layer identifier.
  • the embodiments of the present application may be applied to the downlink, the first communication device is a network side device, the second communication device is a terminal, and the physical layer identifier may be a cell identifier Cell ID.
  • the embodiments of the present application may be applied to sidelinks, where the first communication device is a terminal and the second communication device is a terminal, and the physical layer identifier may be a Sidelink ID or a UE ID.
  • the generating and mapping the synchronization signal sequence in the delayed Doppler domain including:
  • a synchronization signal sequence associated with the physical layer identity is generated.
  • the synchronization signal sequence associated with the physical layer identification may be generated based on at least two PN sequences.
  • the synchronization signal sequence can be generated from two or three PN sequences, and multiple PN sequences collectively indicate Cell ID or collectively indicate Sidelink ID or UE ID.
  • the partial synchronization signal sequence generated by each of the at least two PN sequences is respectively associated with part of the physical layer identifiers in the physical layer identifiers.
  • the corresponding part of the synchronization signal sequence generated by each of the at least two PN sequences may be associated with a part of the physical layer identifier.
  • each PN sequence may be associated with a part of the physical layer identifier.
  • each PN sequence may be associated with a part of the Cell ID.
  • each PN sequence may be associated with a part of the Sidelink ID or UE ID.
  • generating a synchronization signal sequence associated with the physical layer identifier based on at least two PN sequences including:
  • the at least two PN sequences are interleaved, wherein the interleaving manner of the at least one PN sequence is associated with a physical layer identifier or a part of the physical layer identifier; or
  • the at least two PN sequences are placed end to end.
  • a plurality of PN sequences can be interleaved and placed to generate a synchronization signal sequence whose interleaving mode is the same as that of the physical layer identifier or part of the physical layer identifier. Identity associated.
  • multiple PN sequences may be interleaved or connected in sequence according to a fixed rule to generate the synchronization signal sequence.
  • the at least two PN sequences may be placed end to end to generate a synchronization signal sequence.
  • the partial synchronization signal generated by each of the at least two PN sequences is associated with a physical layer identifier.
  • each of the at least two PN sequences is associated with all the physical layer identifiers.
  • the LFSRs used to generate the synchronization signal sequence may be the same or different.
  • generating a synchronization signal sequence associated with the physical layer identifier based on at least two PN sequences including:
  • the at least two PN sequences are interleaved, wherein the interleaving manner of the at least one PN sequence is associated with a physical layer identifier or a part of the physical layer identifier; or
  • the at least two PN sequences are sequentially mapped on at least two rows of resource grids after the row of resource grids, and each row of resource grids in the at least two rows of resource grids maps the One PN sequence in at least two PN sequences, wherein the position of the preset resource grid of one row is associated with that of the communication peer.
  • each PN sequence in the at least two PN sequences is associated with all physical layer identifiers, wherein multiple PN sequences are It can be interleaved, and its interleaving mode is associated with the physical layer identifier.
  • each PN sequence in the at least two PN sequences is associated with all physical layer identifiers, wherein, Starting from a preset row of resource grids, at least two PN sequences are sequentially mapped on at least two rows of resource grids after the row of resource grids, and at least two rows of resource grids are sequentially mapped to the at least two PN sequences, wherein the said The position of a preset row of resource grids is associated with the communication peer. For example, starting from delay tap k, two or three PN sequences are mapped to delay tap(k, k+1) or (k, k respectively) +1, k+2) on. where k is associated with the physical layer identity.
  • the synchronization signal is divided into a first part and a second part;
  • the first part is used for synchronizing timing as a synchronizing signal
  • the second part is used to indicate the physical layer identifier.
  • the synchronization signal sequence generated by one or more PN sequences only a part can be used for blind timing detection; the other part is used to detect information bits after the synchronization timing is found, such as to indicate the physical layer identifier. .
  • the embodiment of the present application uses the synchronization signal sequence as the synchronization signal for transmission in the delayed Doppler domain, maintains good autocorrelation and cross-correlation performance of the synchronization signal, simplifies the synchronization detection step on the receiving side, and is suitable for simplified OTFS engineering implementation. The additional complexity of inserting synchronization signals in the time-frequency domain is avoided.
  • FIG. 12 is a second schematic flowchart of a synchronization signal transmission method provided by an embodiment of the present application. As shown in FIG. 12 , the method includes the following steps:
  • Step 1200 the second communication device receives the time domain sampling points of the synchronization signal sequence
  • Step 1210 Perform synchronization timing detection on the time domain sampling points of the synchronization signal sequence.
  • the embodiment of the present application may be applied to a side link
  • the first communication device may be a terminal UE
  • the second communication device may be a terminal UE.
  • the first communication device may be referred to as a sending end
  • the second communication device may be referred to as a receiving end.
  • the first communication device may use a sequence-based synchronization signal sequence for OTFS modulation, and send it to the second communication device in the delayed Doppler domain, and the second communication device receives the synchronization signal sequence in the delayed Doppler domain after receiving the synchronization signal sequence.
  • the synchronization timing detection can be performed on the time domain sampling points of the synchronization signal sequence.
  • the synchronization signal sequence is generated based on a sequence with good autocorrelation and cross-correlation performance.
  • the first communication device modulates the synchronization signal sequence, it can be mapped to a delay Doppler domain resource grid for transmission.
  • the synchronization signal sequence is transmitted through pilot frames.
  • the second communication device that is, the receiving end, can directly detect the synchronization signal based on the received time domain sampling points, and obtain the synchronization timing without additional processing steps.
  • the embodiment of the present application proposes a synchronization signal design solution in the delayed Doppler domain in the OTFS modulation system, which is used for initial access of the UE.
  • the embodiments of the present application design a dedicated synchronization mechanism for OTFS modulation, so as to better utilize the advantages of the OTFS system.
  • the embodiment of the present application uses the synchronization signal sequence as the synchronization signal for transmission in the delayed Doppler domain, maintains good autocorrelation and cross-correlation performance of the synchronization signal, simplifies the synchronization detection step on the receiving side, and is suitable for simplified OTFS engineering implementation. The additional complexity of inserting synchronization signals in the time-frequency domain is avoided.
  • the performing synchronization timing detection on the time domain sampling points of the synchronization signal sequence includes:
  • the second communication device has pilot mapping related information, sampling the synchronization signal sequence based on the pilot mapping related information to obtain the time domain sampling point;
  • Synchronous timing detection is performed on the time domain sampling points.
  • the second communication device such as the UE may extract time domain sampling points with a total length of QN at a specific location for detection.
  • sampling points may be obtained by sampling the synchronization signal sequence based on pilot mapping related information.
  • the pilot mapping related information may be pilot mapping prior information
  • the second communication device may have pilot mapping related information in the following cases:
  • the system may only support one kind of pilot frequency mapping information, or the pilot frequency used for synchronization may have a well-known default mapping mode.
  • the system can support several pilot mapping modes, and the second communication device can perform traversal search.
  • the second communication device may have a priori information of the pilot mapping configuration of the first communication device.
  • the second communication device may have been connected to the first communication device before, and was in an idle state later, and now needs to re-establish the connection synchronously, while retaining the last configuration information.
  • the performing synchronization timing detection on the time domain sampling points of the synchronization signal sequence includes:
  • the second communication device does not have pilot mapping related information, perform synchronization timing detection on all time domain sampling points of the synchronization signal sequence.
  • the second communication device such as the UE may detect the time domain sampling points with a length of MN.
  • synchronization timing detection may be performed on all time domain sampling points of the synchronization signal sequence based on pilot mapping related information.
  • the second communication device may not have pilot mapping related information in the following cases: the second communication device is powered on and accesses the first communication device for the first time without any prior information.
  • the method further includes:
  • the channel quality related information is determined based on the synchronization signal sequence.
  • the channel quality related information may be determined based on the synchronization signal sequence.
  • the channel quality-related information may be determined based on the synchronization signal sequence.
  • channel estimation may be further performed to obtain the CSI.
  • the method further includes:
  • the data signal is demodulated based on the channel quality related information.
  • the channel quality-related information may be determined based on the synchronization signal sequence.
  • the pilot frame can carry multiple functions: acquiring timing synchronization; acquiring accurate CSI; and serving user data demodulation in subsequent time slots (using QCL relationship); used for pilot resources in subsequent time slots Self-adaptive; after synchronizing the timing, the resource grid in the delayed Doppler domain is recovered, and the pilot frequency is used for channel estimation to demodulate the data in the frame.
  • the embodiment of the present application uses the synchronization signal sequence as the synchronization signal for transmission in the delayed Doppler domain, maintains good autocorrelation and cross-correlation performance of the synchronization signal, simplifies the synchronization detection step on the receiving side, and is suitable for simplified OTFS engineering implementation. The additional complexity of inserting synchronization signals in the time-frequency domain is avoided.
  • the execution body may be a synchronization signal transmission apparatus, or a control module in the synchronization signal transmission apparatus for executing the synchronization signal transmission method.
  • the method for transmitting a synchronization signal performed by a synchronization signal transmission device is used as an example to describe the synchronization signal transmission device provided in the embodiment of the present application.
  • FIG. 13 is one of the schematic structural diagrams of the synchronization signal transmission device provided by the embodiment of the present application. As shown in FIG. 13 , the device includes: a first generation module 1310 and a first transmission module 1320; wherein:
  • the first generation module 1310 is used for the first communication device to generate a synchronization signal sequence mapped in the delayed Doppler domain;
  • the first transmission module 1320 is used for the first communication device to transmit the time domain sampling points of the synchronization signal sequence.
  • the synchronization signal transmission apparatus may generate a synchronization signal sequence mapped in the delayed Doppler domain through the first generating module 1310 ; and then may transmit the time domain sampling points of the synchronization signal sequence through the first transmission module 1320 .
  • the embodiment of the present application uses the synchronization signal sequence as the synchronization signal for transmission in the delayed Doppler domain, maintains good autocorrelation and cross-correlation performance of the synchronization signal, simplifies the synchronization detection step on the receiving side, and is suitable for simplified OTFS engineering implementation. The additional complexity of inserting synchronization signals in the time-frequency domain is avoided.
  • the first generation module is used for:
  • a guard band is not reserved for the synchronization signal sequence on the resource grid of the delayed Doppler domain; or, a guard band is reserved for the synchronization signal sequence on the resource grid of the delayed Doppler domain.
  • the first generation module is used for:
  • the first generation module is used for:
  • a guard band is reserved for the synchronization signal sequence on the resource grid of the delay Doppler domain.
  • the first generation module is used for:
  • the pilot frame where the synchronization signal sequence is located includes a data signal
  • the resource elements and A guard band is reserved between resource elements to which the data signal is mapped.
  • the first generation module is used for:
  • the synchronization signal sequence is mapped to the resource grid pattern of the delay Doppler domain.
  • the first generation module is used for:
  • the synchronization signal sequence is mapped to a resource grid pattern in the delay Doppler domain;
  • a resource grid pattern in which the synchronization signal sequence is mapped to the delay Doppler domain is determined.
  • the first generation module is used for:
  • the synchronization signal sequence is mapped to the row corresponding to any delay tap on the resource grid of the delay Doppler domain.
  • the first generation module is used for:
  • a synchronization signal sequence associated with the physical layer identity is generated.
  • the first generation module is used for:
  • a synchronization signal sequence associated with the physical layer identity is generated.
  • the partial synchronization signal sequence generated by each of the at least two PN sequences is respectively associated with part of the physical layer identifiers in the physical layer identifiers.
  • the first generation module is used for:
  • the at least two PN sequences are interleaved and placed, wherein the interleaving mode of the at least one PN sequence is associated with the physical layer identifier of the communication peer or part of the physical layer identifier; or
  • the at least two PN sequences are placed end to end.
  • the partial synchronization signal generated by each of the at least two PN sequences is associated with the physical layer identifier.
  • the first generation module is used for:
  • the at least two PN sequences are interleaved, wherein the interleaving manner of the at least one PN sequence is associated with the physical layer identifier or part of the physical layer identifier; or
  • the at least two PN sequences are sequentially mapped on at least two rows of resource grids after the row of resource grids, and each row of resource grids in the at least two rows of resource grids maps the One PN sequence in at least two PN sequences, wherein the position of the preset resource grid of one row is associated with that of the communication peer.
  • the synchronization signal is divided into a first part and a second part;
  • the first part is used for synchronizing timing as a synchronizing signal
  • the second part is used to indicate the physical layer identifier.
  • the embodiment of the present application uses the synchronization signal sequence as the synchronization signal for transmission in the delayed Doppler domain, maintains good autocorrelation and cross-correlation performance of the synchronization signal, simplifies the synchronization detection step on the receiving side, and is suitable for simplified OTFS engineering implementation. The additional complexity of inserting synchronization signals in the time-frequency domain is avoided.
  • the synchronization signal transmission apparatus in this embodiment of the present application may be an electronic device, or may be a component in the electronic device, such as an integrated circuit or a chip.
  • the electronic device may be a terminal, or may be other devices other than the terminal.
  • the electronic device may be a mobile phone, a tablet computer, a notebook computer, a palmtop computer, an in-vehicle electronic device, a Mobile Internet Device (MID), an augmented reality (AR)/virtual reality (VR) ) device, robot, wearable device, ultra-mobile personal computer (UMPC), netbook or personal digital assistant (PDA), etc.
  • MID Mobile Internet Device
  • AR augmented reality
  • VR virtual reality
  • UMPC ultra-mobile personal computer
  • PDA personal digital assistant
  • the synchronization signal transmission device in the embodiment of the present application may be a device with an operating system.
  • the operating system may be an Android (Android) operating system, an ios operating system, or other possible operating systems, which are not specifically limited in the embodiments of the present application.
  • the synchronization signal transmission apparatus provided in the embodiments of the present application can implement the various processes implemented by the method embodiments in FIG. 9 to FIG. 11 , and achieve the same technical effect. To avoid repetition, details are not described here.
  • FIG. 14 is a second schematic structural diagram of a synchronization signal transmission device provided by an embodiment of the present application. As shown in FIG. 14 , the device includes: a first receiving module 1410 and a first detection module 1420, wherein:
  • the first receiving module 1410 is used for the second communication device to receive the time domain sampling point of the synchronization signal sequence
  • the first detection module 1420 is used for the second communication device to perform synchronization timing detection on the time domain sampling points of the synchronization signal sequence.
  • the synchronization signal transmission apparatus may receive the time domain sampling points of the synchronization signal sequence through the first receiving module 1410; and then the first detection module 1420 may perform synchronization timing detection on the time domain sampling points of the synchronization signal sequence.
  • the embodiment of the present application uses the synchronization signal sequence as the synchronization signal for transmission in the delayed Doppler domain, maintains good autocorrelation and cross-correlation performance of the synchronization signal, simplifies the synchronization detection step on the receiving side, and is suitable for simplified OTFS engineering implementation. The additional complexity of inserting synchronization signals in the time-frequency domain is avoided.
  • the first detection module is used for:
  • the second communication device has pilot mapping related information, sampling the synchronization signal sequence based on the pilot mapping related information to obtain the time domain sampling point;
  • Synchronous timing detection is performed on the time domain sampling points.
  • the first detection module is used for:
  • the second communication device does not have pilot mapping related information, perform synchronization timing detection on all time domain sampling points of the synchronization signal sequence.
  • the device further includes:
  • the first determination is used for determining channel quality related information based on the synchronization signal sequence when the synchronization signal sequence is used for timing synchronization and for acquiring channel quality related information.
  • the device further includes:
  • a first demodulation module configured to demodulate the data signal based on the channel quality related information in the case that the pilot frame where the synchronization signal sequence is located includes a data signal.
  • the embodiment of the present application uses the synchronization signal sequence as the synchronization signal for transmission in the delayed Doppler domain, maintains good autocorrelation and cross-correlation performance of the synchronization signal, simplifies the synchronization detection step on the receiving side, and is suitable for simplified OTFS engineering implementation. The additional complexity of inserting synchronization signals in the time-frequency domain is avoided.
  • the synchronization signal transmission device in this embodiment of the present application may be a device, or may be a component, an integrated circuit, or a chip in a terminal.
  • the device may be a mobile terminal or a non-mobile terminal.
  • the mobile terminal may include, but is not limited to, the types of terminals 11 listed above, and the non-mobile terminal may be a server, a network attached storage (NAS), a personal computer (personal computer, PC), a television ( television, TV), teller machine, or self-service machine, etc., which are not specifically limited in the embodiments of the present application.
  • the synchronization signal transmission device in the embodiment of the present application may be a device with an operating system.
  • the operating system may be an Android (Android) operating system, an ios operating system, or other possible operating systems, which are not specifically limited in the embodiments of the present application.
  • the synchronization signal transmission device provided in the embodiment of the present application can realize the various processes realized by the method embodiment of FIG. 12, and achieve the same technical effect. In order to avoid repetition, details are not repeated here.
  • FIG. 15 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • a communication device 1500 includes a processor 1501 and a memory 1502 , which are stored in the memory 1502 and can be stored in the processor 1501
  • the communication device 1500 is a terminal
  • the program or instruction is executed by the processor 1501
  • each process of the above method embodiments can be implemented, and the same technical effect can be achieved.
  • the communication device 1500 is a network side device, when the program or instruction is executed by the processor 1501, each process of the above method embodiments can be implemented, and the same technical effect can be achieved. To avoid repetition, details are not repeated here.
  • the second communication device may be a terminal, and the first communication device may be a network side device;
  • the first communication device may be a terminal
  • the second communication device may be a terminal
  • FIG. 16 is a schematic diagram of a hardware structure of a terminal provided by an embodiment of the present application.
  • the terminal 1600 includes but is not limited to: a radio frequency unit 1601, a network module 1602, an audio output unit 1603, an input unit 1604, a sensor 1605, a display unit 1606, a user input unit 1607, an interface unit 1608, a memory 1609, and a processor 1610, etc. at least part of the components.
  • the terminal 1600 may also include a power source (such as a battery) for supplying power to various components, and the power source may be logically connected to the processor 1610 through a power management system, so as to manage charging, discharging, and power consumption through the power management system management and other functions.
  • a power source such as a battery
  • the terminal structure shown in FIG. 16 does not constitute a limitation on the terminal, and the terminal may include more or less components than shown, or combine some components, or arrange different components, which will not be repeated here.
  • the input unit 1604 may include a graphics processor (Graphics Processing Unit, GPU) 16041 and a microphone 16042. Such as camera) to obtain still pictures or video image data for processing.
  • the display unit 1606 may include a display panel 16061, which may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like.
  • the user input unit 1607 includes a touch panel 16071 and other input devices 16072 . Touch panel 16071, also called touch screen.
  • the touch panel 16071 may include two parts, a touch detection device and a touch controller.
  • Other input devices 16072 may include, but are not limited to, physical keyboards, function keys (such as volume control keys, switch keys, etc.), trackballs, mice, and joysticks, which are not described herein again.
  • the radio frequency unit 1601 receives the information from the communication peer end, and then processes it to the processor 1610; in addition, sends the information to be transmitted to the communication peer end.
  • the radio frequency unit 1601 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.
  • the memory 1609 may be used to store software programs as well as various data.
  • the memory 1609 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, an application program or instructions required for at least one function (such as a sound playback function, image playback function, etc.), etc.
  • memory 1609 may include volatile memory or non-volatile memory, or memory 1609 may include both volatile and non-volatile memory.
  • the non-volatile memory may be a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), an electrically programmable read-only memory (Erasable PROM, EPROM). Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory.
  • Volatile memory can be random access memory (Random Access Memory, RAM), static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchronous random access memory) DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDRSDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (Synch link DRAM) , SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DRRAM).
  • RAM Random Access Memory
  • SRAM static random access memory
  • DRAM dynamic random access memory
  • DRAM synchronous dynamic random access memory
  • Synchronous random access memory double data rate synchronous dynamic random access memory
  • Double Data Rate SDRAM Double Data Rate SDRAM, DDRSDRAM
  • enhanced SDRAM synchronous dynamic random access memory
  • Synch link DRAM synchronous link dynamic random access memory
  • SLDRAM direct memory bus random access memory
  • the processor 1610 may include one or more processing units; optionally, the processor 1610 integrates an application processor and a modem processor, wherein the application processor mainly processes operations involving an operating system, a user interface, and an application program, etc. Modem processors mainly deal with wireless communications, such as baseband processors. It can be understood that, the above-mentioned modulation and demodulation processor may not be integrated into the processor 1610.
  • the processor 1610 is used for:
  • the time domain sampling points of the synchronization signal sequence are transmitted.
  • the embodiment of the present application uses the synchronization signal sequence as the synchronization signal for transmission in the delayed Doppler domain, maintains good autocorrelation and cross-correlation performance of the synchronization signal, simplifies the synchronization detection step on the receiving side, and is suitable for simplified OTFS engineering implementation. The additional complexity of inserting synchronization signals in the time-frequency domain is avoided.
  • processor 1610 is used to:
  • a guard band is not reserved for the synchronization signal sequence on the resource grid of the delayed Doppler domain; or, a guard band is reserved for the synchronization signal sequence on the resource grid of the delayed Doppler domain.
  • processor 1610 is used to:
  • processor 1610 is used to:
  • the transmitting the synchronization signal sequence in the delayed Doppler domain includes:
  • a guard band is reserved for the synchronization signal sequence on the resource grid of the delay Doppler domain.
  • processor 1610 is used to:
  • the pilot frame where the synchronization signal sequence is located includes a data signal
  • the resource elements and A guard band is reserved between resource elements to which the data signal is mapped.
  • processor 1610 is used to:
  • the synchronization signal sequence is mapped to the resource grid pattern of the delay Doppler domain.
  • processor 1610 is used to:
  • the synchronization signal sequence is mapped to a resource grid pattern in the delay Doppler domain;
  • a resource grid pattern in which the synchronization signal sequence is mapped to the delay Doppler domain is determined.
  • processor 1610 is used to:
  • the synchronization signal sequence is mapped to the row corresponding to any delay tap on the resource grid of the delay Doppler domain.
  • processor 1610 is used to:
  • a synchronization signal sequence associated with the physical layer identity is generated.
  • processor 1610 is used to:
  • a synchronization signal sequence associated with the physical layer identity is generated.
  • the partial synchronization signal sequence generated by each of the at least two PN sequences is respectively associated with part of the physical layer identifiers in the physical layer identifiers.
  • processor 1610 is used to:
  • the at least two PN sequences are interleaved and placed, wherein the interleaving mode of the at least one PN sequence is associated with the physical layer identifier of the communication peer or part of the physical layer identifier; or
  • the at least two PN sequences are placed end to end.
  • the partial synchronization signal generated by each of the at least two PN sequences is associated with the physical layer identifier.
  • processor 1610 is used to:
  • the at least two PN sequences are interleaved, wherein the interleaving manner of the at least one PN sequence is associated with the physical layer identifier or part of the physical layer identifier; or
  • the at least two PN sequences are sequentially mapped on at least two rows of resource grids after the row of resource grids, and each row of resource grids in the at least two rows of resource grids maps the One PN sequence in at least two PN sequences, wherein the position of the preset resource grid of one row is associated with that of the communication peer.
  • the synchronization signal is divided into a first part and a second part;
  • the first part is used for synchronizing timing as a synchronizing signal
  • the second part is used to indicate the physical layer identifier.
  • processor 1610 is used to:
  • the synchronization timing is detected on the time domain sampling points of the synchronization signal sequence.
  • the embodiment of the present application uses the synchronization signal sequence as the synchronization signal to transmit in the delayed Doppler domain, maintains good autocorrelation and cross-correlation performance of the synchronization signal, simplifies the synchronization detection step on the receiving side, and is suitable for simplified OTFS engineering implementation. The additional complexity of inserting synchronization signals in the time-frequency domain is avoided.
  • processor 1610 is used to:
  • the second communication device has pilot mapping related information, sampling the synchronization signal sequence based on the pilot mapping related information to obtain the time domain sampling point;
  • Synchronous timing detection is performed on the time domain sampling points.
  • processor 1610 is used to:
  • the second communication device does not have pilot mapping related information, perform synchronization timing detection on all time domain sampling points of the synchronization signal sequence.
  • processor 1610 is used to:
  • the channel quality related information is determined based on the synchronization signal sequence.
  • processor 1610 is used to:
  • the pilot frame where the synchronization signal sequence is located includes a data signal
  • the data signal is demodulated based on the channel quality related information.
  • the embodiment of the present application uses the synchronization signal sequence as the synchronization signal for transmission in the delayed Doppler domain, maintains good autocorrelation and cross-correlation performance of the synchronization signal, simplifies the synchronization detection step on the receiving side, and is suitable for simplified OTFS engineering implementation. The additional complexity of inserting synchronization signals in the time-frequency domain is avoided.
  • terminal embodiments in the embodiments of the present application are product embodiments corresponding to the foregoing method embodiments, and all implementation manners in the foregoing method embodiments are applicable to the terminal embodiments, and the same or similar technical effects can also be achieved. This will not be repeated here.
  • FIG. 17 is a schematic diagram of a hardware structure of a network side device provided by an embodiment of the present application.
  • the network side device 1700 includes: an antenna 1701 , a radio frequency device 1702 , and a baseband device 1703 .
  • the antenna 1701 is connected to the radio frequency device 1702 .
  • the radio frequency device 1702 receives information through the antenna 1701, and sends the received information to the baseband device 1703 for processing.
  • the baseband device 1703 processes the information to be sent and sends it to the radio frequency device 1702
  • the radio frequency device 1702 processes the received information and sends it out through the antenna 1701 .
  • the above-mentioned frequency band processing apparatus may be located in the baseband apparatus 1703 , and the method performed by the network side device in the above embodiments may be implemented in the baseband apparatus 1703 .
  • the baseband apparatus 1703 includes a processor 1704 and a memory 1705 .
  • the baseband device 1703 may include, for example, at least one baseband board on which multiple chips are arranged, as shown in FIG. 17 , one of the chips is, for example, the processor 1704 , which is connected to the memory 1705 to call the program in the memory 1705 to execute
  • the network devices shown in the above method embodiments operate.
  • the baseband device 1703 may further include a network interface 1706 for exchanging information with the radio frequency device 1702, and the interface is, for example, a common public radio interface (CPRI for short).
  • CPRI common public radio interface
  • the network-side device in this embodiment of the present application further includes: instructions or programs that are stored in the memory 1705 and run on the processor 1704, and the processor 1704 invokes the instructions or programs in the memory 1705 to execute the modules shown in FIG. 13 .
  • the processor 1704 is used for:
  • the time domain sampling points of the synchronization signal sequence are transmitted.
  • the embodiment of the present application uses the synchronization signal sequence as the synchronization signal for transmission in the delayed Doppler domain, maintains good autocorrelation and cross-correlation performance of the synchronization signal, simplifies the synchronization detection step on the receiving side, and is suitable for simplified OTFS engineering implementation. The additional complexity of inserting synchronization signals in the time-frequency domain is avoided.
  • processor 1704 is used to:
  • a guard band is not reserved for the synchronization signal sequence on the resource grid of the delayed Doppler domain; or, a guard band is reserved for the synchronization signal sequence on the resource grid of the delayed Doppler domain.
  • processor 1704 is used to:
  • processor 1704 is used to:
  • the transmitting the synchronization signal sequence in the delayed Doppler domain includes:
  • a guard band is reserved for the synchronization signal sequence on the resource grid of the delay Doppler domain.
  • processor 1704 is used to:
  • the pilot frame where the synchronization signal sequence is located includes a data signal
  • the resource elements and A guard band is reserved between resource elements to which the data signal is mapped.
  • processor 1704 is used to:
  • the synchronization signal sequence is mapped to the resource grid pattern of the delay Doppler domain.
  • processor 1704 is used to:
  • the synchronization signal sequence is mapped to a resource grid pattern in the delay Doppler domain;
  • a resource grid pattern in which the synchronization signal sequence is mapped to the delay Doppler domain is determined.
  • processor 1704 is used to:
  • the synchronization signal sequence is mapped to the row corresponding to any delay tap on the resource grid of the delay Doppler domain.
  • processor 1704 is used to:
  • a synchronization signal sequence associated with the physical layer identity is generated.
  • processor 1704 is used to:
  • a synchronization signal sequence associated with the physical layer identity is generated.
  • the partial synchronization signal sequence generated by each of the at least two PN sequences is respectively associated with part of the physical layer identifiers in the physical layer identifiers.
  • processor 1704 is used to:
  • the at least two PN sequences are interleaved and placed, wherein the interleaving mode of the at least one PN sequence is associated with the physical layer identifier of the communication peer or part of the physical layer identifier; or
  • the at least two PN sequences are placed end to end.
  • the partial synchronization signal generated by each of the at least two PN sequences is associated with the physical layer identifier.
  • processor 1704 is used to:
  • the at least two PN sequences are interleaved, wherein the interleaving manner of the at least one PN sequence is associated with the physical layer identifier or part of the physical layer identifier; or
  • the at least two PN sequences are sequentially mapped on at least two rows of resource grids after the row of resource grids, and each row of resource grids in the at least two rows of resource grids maps the One PN sequence in at least two PN sequences, wherein the position of the preset resource grid of one row is associated with that of the communication peer.
  • the synchronization signal is divided into a first part and a second part;
  • the first part is used for synchronizing timing as a synchronizing signal
  • the second part is used to indicate the physical layer identifier.
  • the embodiment of the present application uses the synchronization signal sequence as the synchronization signal for transmission in the delayed Doppler domain, maintains good autocorrelation and cross-correlation performance of the synchronization signal, simplifies the synchronization detection step on the receiving side, and is suitable for simplified OTFS engineering implementation. The additional complexity of inserting synchronization signals in the time-frequency domain is avoided.
  • the network-side device embodiments in the embodiments of the present application are product embodiments corresponding to the foregoing method embodiments, and all implementations in the foregoing method embodiments are applicable to the terminal embodiments, and can also achieve the same or similar technical effects. Therefore, it will not be repeated here.
  • the embodiments of the present application further provide a readable storage medium, where a program or an instruction is stored on the readable storage medium, and when the program or instruction is executed by a processor, each process of the above-mentioned embodiment of the synchronization signal transmission method is implemented, and can achieve The same technical effect, in order to avoid repetition, will not be repeated here.
  • the processor is the processor in the terminal described in the foregoing embodiment.
  • the readable storage medium includes a computer-readable storage medium, such as a computer read-only memory (Read-Only Memory, ROM), a random access memory (Random Access Memory, RAM), a magnetic disk or an optical disk, and the like.
  • An embodiment of the present application further provides a chip, where the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is used to run a network-side device program or instruction to realize the above synchronization signal transmission
  • the chip includes a processor and a communication interface
  • the communication interface is coupled to the processor
  • the processor is used to run a network-side device program or instruction to realize the above synchronization signal transmission
  • the chip mentioned in the embodiments of the present application may also be referred to as a system-on-chip, a system-on-chip, a system-on-chip, or a system-on-a-chip, or the like.
  • the method of the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is better implementation.
  • the technical solution of the present application can be embodied in the form of a software product in essence or in a part that contributes to the prior art, and the computer software product is stored in a storage medium (such as ROM/RAM, magnetic disk, CD-ROM), including several instructions to make a terminal (which may be a mobile phone, a computer, a server, or a network device, etc.) execute the methods described in the various embodiments of this application.
  • a storage medium such as ROM/RAM, magnetic disk, CD-ROM

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Abstract

本申请公开了一种同步信号传输方法、装置、设备及存储介质，属于通信技术领域。所述方法包括：第一通信设备生成映射在延迟多普勒域的同步信号序列；在延迟多普勒域对所述同步信号序列的时域采样点进行传输。

Description

同步信号传输方法、装置、设备及存储介质
相关申请的交叉引用
本申请要求于2021年03月01日提交的申请号为2021102271370，发明名称为“同步信号传输方法、装置、设备及存储介质”的中国专利申请的优先权，其通过引用方式全部并入本申请。
技术领域
本申请属于通信技术领域，具体涉及一种同步信号传输方法、装置、设备及存储介质。
背景技术
终端的初始接入一般依托于同步信号进行。
相关技术中，同步技术都是建立在正交频分复用(Orthogonal Frequency Division Multiplexing，OFDM)即OFDM调制和新空口(New Radio，NR)帧结构基础上的，在应用于正交时频空域(Orthogonal Time Frequency，OTFS)系统的同步定时功能时，可能导致设备需要在广播信道和数据信道之间频繁切换调制方式，增加实现复杂度；且相关技术中设计的同步信号块(Synchronization signal block，SSB)中的主同步信号(Primary synchronization signal，PSS)-辅同步信号(Secondary synchronization signal，SSS)二元架构以及同步信号(synchronization signal，SS)与主消息块(Master information block，MIB)耦合的设计对OTFS系统较为冗余。
发明内容
本申请实施例的目的是提供一种同步信号传输方法、装置、设备及存 储介质，能够实现同步信号传输后简化接收侧的同步检测步骤。
第一方面，提供了一种同步信号传输方法，该方法包括：
第一通信设备生成映射在延迟多普勒域的同步信号序列；
第一通信设备对所述同步信号序列的时域采样点进行传输。
第二方面，提供了一种同步信号传输方法，该方法包括：
第二通信设备接收同步信号序列的时域采样点；
第二通信设备对所述同步信号序列的时域采样点进行同步定时检测。
第三方面，提供了一种同步信号传输装置，该装置包括：
第一生成模块，用于生成映射在延迟多普勒域的同步信号序列；
第一传输模块，用于对所述同步信号序列的时域采样点进行传输。
第四方面，提供了一种同步信号传输装置，该装置包括：
第一接收模块，用于接收同步信号序列的时域采样点；
第一检测模块，用于对所述同步信号序列的时域采样点进行同步定时检测。
第五方面，提供了一种通信设备，包括处理器，存储器及存储在所述存储器上并可在所述处理器上运行的程序或指令，所述程序或指令被所述处理器执行时实现如第一方面所述的方法的步骤。
第六方面，提供了一种通信设备，包括处理器，存储器及存储在所述存储器上并可在所述处理器上运行的程序或指令，所述程序或指令被所述处理器执行时实现如第二方面所述的方法的步骤。
第七方面，提供了一种可读存储介质，所述可读存储介质上存储程序或指令，所述程序或指令被处理器执行时实现如第一方面所述的方法的步骤，或者实现如第二方面所述的方法的步骤。
第八方面，提供了一种芯片，所述芯片包括处理器和通信接口，所述通信接口和所述处理器耦合，所述处理器用于运行程序或指令，实现如第一方面所述的方法的步骤，或者实现如第二方面所述的方法的步骤。
在本申请实施例中，通过采用同步信号序列作为同步信号在延迟多普 勒域进行传输，保持同步信号良好的自相关及互相关性能，简化了接收侧的同步检测步骤，适用于简化的OTFS工程实现，避免了在时频域插入同步信号造成的额外复杂度。
附图说明
图1示出本申请实施例可应用的一种无线通信系统的框图；
图2是本申请实施例提供的延迟多普勒域和时间频率平面的相互转换的示意图；
图3是本申请实施例提供的不同平面下的信道响应关系的示意图；
图4是本申请实施例提供的OTFS多载波系统的收发端处理流程示意图；
图5是本申请实施例提供的延迟多普勒域的导频资源复用的示意图；
图6是本申请实施例提供的导频序列的检测示意图；
图7是本申请实施例提供的同步信号设计示意图；
图8是本申请实施例提供的同步信号传输方法的流程示意图之一图9是本申请实施例提供的OTFS系统的工程实现的示意图；
图10是本申请实施例提供的延迟多普勒域序列变换为时域采样点的示意图；
图11是本申请实施提供的导频开销示意图；
图12是本申请实施例提供的同步信号传输方法的流程示意图之二；
图13是本申请实施例提供的同步信号传输装置的结构示意图之一；
图14是本申请实施例提供的同步信号传输装置的结构示意图之二；
图15是本申请实施例提供的通信设备的结构示意图；
图16是本申请实施例提供的终端的硬件结构示意图；
图17是本申请实施例提供的网络侧设备的硬件结构示意图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员所获得的所有其他实施例，都属于本申请保护的范围。
本申请的说明书和权利要求书中的术语“第一”、“第二”等是用于区别类似的对象，而不用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换，以便本申请的实施例能够以除了在这里图示或描述的那些以外的顺序实施，且“第一”、“第二”所区别的对象通常为一类，并不限定对象的个数，例如第一对象可以是一个，也可以是多个。此外，说明书以及权利要求中“和/或”表示所连接对象的至少其中之一，字符“/”一般表示前后关联对象是一种“或”的关系。
值得指出的是，本申请实施例所描述的技术不限于长期演进型(Long Term Evolution，LTE)/LTE的演进(LTE-Advanced，LTE-A)系统，还可用于其他无线通信系统，诸如码分多址(Code Division Multiple Access，CDMA)、时分多址(Time Division Multiple Access，TDMA)、频分多址(Frequency Division Multiple Access，FDMA)、正交频分多址(Orthogonal Frequency Division Multiple Access，OFDMA)、单载波频分多址(Single-carrier Frequency-Division Multiple Access，SC-FDMA)和其他系统。本申请实施例中的术语“系统”和“网络”常被可互换地使用，所描述的技术既可用于以上提及的系统和无线电技术，也可用于其他系统和无线电技术。以下描述出于示例目的描述了新空口(New Radio，NR)系统，并且在以下大部分描述中使用NR术语，但是这些技术也可应用于NR系统应用以外的应用，如第6代(6th Generation，6G)通信系统。
图1示出本申请实施例可应用的一种无线通信系统的框图。无线通信系统包括终端11和网络侧设备12。其中，终端11也可以称作终端设备或者用户终端(User Equipment，UE)，终端11可以是手机、平板电脑(Tablet Personal Computer)、膝上型电脑(Laptop Computer)或称为笔记本电脑、 个人数字助理(Personal Digital Assistant，PDA)、掌上电脑、上网本、超级移动个人计算机(ultra-mobile personal computer，UMPC)、移动上网装置(Mobile Internet Device，MID)、增强现实(augmented reality，AR)/虚拟现实(virtual reality，VR)设备、机器人、可穿戴式设备(Wearable Device)、车载设备(VUE)、行人终端(PUE)、智能家居(具有无线通信功能的家居设备，如冰箱、电视、洗衣机或者家具等)、游戏机、个人计算机(personal computer，PC)、柜员机或者自助机等终端侧设备，可穿戴式设备包括：智能手表、智能手环、智能耳机、智能眼镜、智能首饰(智能手镯、智能手链、智能戒指、智能项链、智能脚镯、智能脚链等)、智能腕带、智能服装等。需要说明的是，在本申请实施例并不限定终端11的具体类型。网络侧设备12可以包括接入网设备或核心网设备，其中，接入网设备12也可以称为无线接入网设备、无线接入网(Radio Access Network,RAN)、无线接入网功能或无线接入网单元。接入网设备12可以包括基站、WLAN接入点或WiFi节点等，基站可被称为节点B、演进节点B、接入点、基收发机站(Base Transceiver Station，BTS)、无线电基站、无线电收发机、基本服务集(Basic Service Set，BSS)、扩展服务集(Extended Service Set，ESS)、家用B节点、家用演进型B节点、发送接收点(Transmitting Receiving Point，TRP)或所述领域中其他某个合适的术语，只要达到相同的技术效果，所述基站不限于特定技术词汇，需要说明的是，在本申请实施例中仅以NR系统中的基站为例，但是并不限定基站的具体类型。核心网设备可以包含但不限于如下至少一项：核心网节点、核心网功能、移动管理实体(Mobility Management Entity，MME)、接入移动管理功能(Access and Mobility Management Function，AMF)、会话管理功能(Session Management Function，SMF)、用户平面功能(User Plane Function，UPF)、策略控制功能(Policy Control Function，PCF)、策略与计费规则功能单元(Policy and Charging Rules Function，PCRF)、边缘应用服务发现功能(Edge Application Server Discovery Function，EASDF)、统一数据管理(Unified Data Management，UDM)，统 一数据仓储(Unified Data Repository，UDR)、归属用户服务器(Home Subscriber Server，HSS)、集中式网络配置(Centralized network configuration，CNC)、网络存储功能(Network Repository Function，NRF)，网络开放功能(Network Exposure Function，NEF)、本地NEF(Local NEF，或L-NEF)、绑定支持功能(Binding Support Function，BSF)、应用功能(Application Function，AF)等。需要说明的是，在本申请实施例中仅以NR系统中的核心网设备为例进行介绍，并不限定核心网设备的具体类型。
下面结合附图，通过一些实施例及其应用场景对本申请实施例提供的同步信号传输方法及装置进行详细地说明。
为了方便描述，首先对以下内容进行介绍：
下行控制消息，Downlink control information，DCI；
物理下行控制信道，Physical downlink control channel，PDCCH；
物理下行共享信道，Physical downlink shared channel，PDSCH；
物理资源控制，Radio resource control，RRC；
物理广播信道，Physical broadcast channel，PBCH；
主消息块，Master information block，MIB；
系统消息块，System information block，SIB；
资源元素，Resource element，RE；
码分复用，Code division multiplexing，CDM；
正交覆盖码，Orthogonal cover code，OCC；
均方误差，Mean square error，MSE；
正交频分复用，Orthogonal frequency division multiplexing，OFDM；
误码率，Bit error rate，BER；
误码率，Block error rate，BLER；
单频网，Single frequency network，SFN；
同步信号块，Synchronization signal block，SSB；
主同步信号，Primary synchronization signal，PSS；
辅同步信号，Secondary synchronization signal，SSS；
解调参考信号，Demodulation reference signal，DMRS；
离散傅里叶变换，Discrete Fourier transform，DFT；
快速傅里叶变换，Fast Fourier transform，FFT；
逆快速傅里叶变换，Inverse fast Fourier transform，IFFT；
辛傅里叶变换，Symplectic Fourier transform，SFFT；
逆辛傅里叶变换，Inverse symplectic Fourier transform，ISFFT；
线性移位寄存器Linear feedback shift register，LFSR。
在城市里复杂的电磁波传输环境中，由于存在大量的散射、反射和折射面，造成了无线信号经不同路径到达接收天线的时刻不同，即传输的多径效应。当发送信号的前后符号经过不同路径同时抵达时，或者说，当后一个符号在前一个符号的时延扩展内到达时，即产生了符号间干扰(inter symbol interference，ISI)。类似的，在频域上，由于收发端相对速度引起的多普勒效应，信号所在的各个子载波会产生频率上不同程度的偏移，造成原本可能正交的子载波产生重叠，即产生了载波间干扰(inter carrier interference，ICI)。通信系统中使用的正交频分复用技术(Orthogonal Frequency Division Multiplexing，OFDM)多载波系统，通过添加循环前缀(cyclic prefix，CP)的设计，抗ISI的性能较好。但是OFDM的弱点是子载波间隔的大小有限，因此在应对高速移动场景下(如高铁)，由于收发端之间较大的相对速度带来的较大多普勒频移，破坏了OFDM子载波之间的正交性，使子载波间产生严重的ICI。
正交时频空域(Orthogonal Time Frequency Space，OTFS)技术的提出则致力于解决以上OFDM系统中的问题。OTFS技术定义了延迟多普勒域和时频域之间的变换。通过同时在收发端把业务数据和导频映射到延迟多普勒域处理，通过设计在延迟多普勒域的导频捕捉信道的延迟和多普勒特性，并且通过设计保护间隔，规避了OFDM系统中的ICI导致的导频污染问题，从而使信道估计更加准确，有利于接收端提升数据译码的成功率。
OTFS技术中，位于延迟多普勒域的导频符号四周需要有保护间隔，保护间隔的大小与信道特性相关。本申请通过对信道的测量，根据信道特性动态调整导频符号保护间隔的大小，从而可以保证在满足系统设计的前提下，导频开销近似最小化，避免传统方案中总是考虑最差情况带来的资源浪费问题。
信道的延迟和多普勒的特性本质上由多径信道决定。通过不同路径到达接收端的信号，因为传播路程存在差异，因此到达时间也不同。例如两个回波s 1和s 2各自经历距离d 1和d 2到达接收端，则他们抵达接收端的时间差为：
Figure PCTCN2022077886-appb-000001
其中，c为光速。
由于回波s 1和s 2之间存在这种时间差，它们在接收端侧的相干叠加造成了观测到的信号幅度抖动，即衰落效应。类似的，多径信道的多普勒扩散也是由于多径效应造成。
多普勒效应是由于收发两端存在相对速度，历经不同路径到达接收端的信号，其相对于天线法线的入射角度存在差异，因此造成了相对速度的差异，进而造成了不同路径信号的多普勒频移不同。假设信号的原始频率为f 0，收发端的相对速度为Δv，信号与接收端天线的法线入射夹角为θ。则有：
Figure PCTCN2022077886-appb-000002
显然，当两个回波s 1和s 2历经不同路径到达接收端天线而具有不同的入射角θ 1和θ 2时，他们所得到的多普勒频移Δf 1和Δf 2也不同。
综上所述，接收端收到的信号是来自不同路径的具有不同时延和多普勒的分量信号的叠加，整体体现为一个相对原信号具有衰落和频移的接收信号。而对信道进行延迟多普勒分析，则有助于收集每个路径的延迟多普勒信息，从而反映信道的延迟多普勒响应。
OTFS调制技术的全称是正交时频空域调制。该技术把一个大小为M×N的数据包中的信息，例如正交调幅(Quadrature Amplitude Modulation，QAM)符号，在逻辑上映射到二维延迟多普勒域上的一个M×N格点中，即每个格点内的脉冲调制了数据包中的一个QAM符号。
图2是本申请实施例提供的延迟多普勒域和时间频率平面的相互转换的示意图，如图2所示，通过设计一组正交二维基函数，将M×N的延迟多普勒域平面上的数据集变换到N×M的时频域平面上，这种变换在数学上被称为逆辛傅里叶变换(Inverse Sympletic Fast Fourier Transform,ISFFT)。对应的，从时频域到延迟多普勒域的变换被称为辛傅里叶变换(Sympletic Fourier Transform)。其背后的物理意义是，信号的延迟和多普勒效应，实际上是一种信号通过多经信道后的一系列具有不同时间和频率偏移的回波的线性叠加效应。从这个意义上说，延迟多普勒分析和时频域分析可以通过所述的ISFFT和SSFT相互转换得到。
由此，OTFS技术把时变多径信道变换为一个(一定持续时间内的)时不变二维延迟多普勒域信道，从而直接体现了无线链路中由于收发机之间的反射体相对位置的几何特性造成的信道延迟多普勒响应特性。这样的好处是，OTFS消除了传统时频域分析跟踪时变衰落特性的难点，转而通过延迟多普勒域分析抽取出时频域信道的所有分集特性。实际系统中，由于信道的延迟径和多普勒频移的数量远远小于信道的时域和频域响应数量，用延迟多普勒域表征的信道冲激响应矩阵具有稀疏性。利用OTFS技术在延迟多普勒域对稀疏信道矩阵进行分析，可以使参考信号的封装更加紧密和灵活，尤其有利于支持大规模MIMO系统中的大型天线阵列。
OTFS调制的核心是定义在延迟多普勒域上的QAM符号，变换到时频域进行发送，然后接收端回到延迟多普勒域处理。因而可以引入延迟多普勒域上的无线信道响应分析方法。
图3是本申请实施例提供的不同平面下的信道响应关系的示意图，如图3所示为信号通过线性时变无线信道时，其信道响应在不同平面下的表 达之间的关系。
在图3中，SFFT变换公式为：
h(τ,ν)＝∫∫H(t,f)e -j2π(νt-fτ)dτdν；      (1)
对应的，ISFFT的变换公式为：
H(t,f)＝∫∫h(τ,ν)e j2π(νt-fτ)dτdν；     (2)
信号通过线性时变信道时，令时域接收信号为r(t)，其对应的频域接收信号为R(f)，且有
Figure PCTCN2022077886-appb-000003
r(t)可以表示为如下形式：
r(t)＝s(t)*h(t)＝∫g(t,τ)s(t-τ)dτ；      (3)
由图3关系可知，
g(t,τ)＝∫h(ν,τ)e j2πνtdν；     (4)
把(4)代入(3)可得：
r(t)＝∫∫h(ν,τ)s(t-τ)e j2πνtdτdν；      (5)
由图3所示关系，经典傅里叶变换理论，以及公式(5)可知：
Figure PCTCN2022077886-appb-000004
等式(6)暗示，在OTFS系统进行延迟多普勒域的分析，可以依托相关技术中的建立在时频域上的通信框架，在收发端加上额外的信号处理过程来实现。并且，所述额外的信号处理仅由傅里叶变换组成，可以完全通过相关技术中的硬件实现，无需新增模块。这种与相关技术中硬件体系的良好兼容性大大方便了OTFS系统的应用。实际系统中，OTFS技术可以很方便的被实现为一个滤波OFDM系统的前置和后置处理模块，因此与相关技术中的多载波系统有着很好的兼容性。
OTFS与多载波系统结合时，发送端的实现方式如下：含有需要发送信息的QAM符号由延迟多普勒域的波形承载，经过一个二维的逆辛傅里叶变换(Inverse Sympletic Fast Finite Fourier Transform，ISFFT)，转换为传统多载波系统中的时频域平面的波形，再经过符号级的一维逆快速傅里 叶变换(Inverse Fast Fourier Transform，IFFT)和串并转换，变成时域采样点发送出去。
OTFS系统的接收端大致是一个发送端的逆过程：时域采样点经接收端接收后，经过并传转换和符号级的一维快速傅里叶变换(Fast Fourier Transform，FFT)，先变换到时频域平面上的波形，然后经过二维辛傅里叶变换(Sympletic Finite Fourier Transform，SFFT)，转换为延迟多普勒域平面的波形，然后对由延迟多普勒域波形承载的QAM符号进行接收端的处理：包括但不限于信道估计和均衡，解调和译码等。
图4是本申请实施例提供的OTFS多载波系统的收发端处理流程示意图。
OTFS调制的优越性主要体现在以下方面：
1)OTFS调制把收发机之间的时频域中的时变衰落信道转化为延迟多普勒域中的确定性的无衰落信道。在延迟多普勒域中，一次发送的一组信息符号中的每个符号都经历相同的静态信道响应和SNR。
2)OTFS系统通过延迟多普勒图像解析出物理信道中的反射体，并用接收均衡器对来自不同反射路径的能量进行相干合并，实际上提供了一个无衰落的静态信道响应。利用上述静态信道特性，OTFS系统无需像OFDM系统一样引入闭环信道自适应来应对快变的信道，因而提升了系统健壮性并降低了系统设计的复杂度。
3)由于延迟多普勒域中的延迟-多普勒的状态数量远小于时频域的时间-频率状态数量，因而OTFS系统中的信道可以表达为非常紧凑的形式。OTFS系统的信道估计开销更少，更加精确。
4)OTFS的另一个优越性体现应对极致多普勒信道上。通过适当信号处理参数下对延迟多普勒图像的分析，信道的多普勒特性会被完整呈现，因而有利于多普勒敏感场景(例如高速移动和毫米波)下的信号分析和处理。
基于以上分析，OTFS系统中的信道估计可以采用全新的方法。发射 机将导频脉冲映射在延迟多普勒域上，接收端利用对导频的延迟多普勒图像分析，估计出延迟多普勒域的信道响应h(ν,τ)，进而可以根据图3所示关系得到时频域的信道响应表达式，方便应用时频域的已有技术进行信号分析和处理。
图5是本申请实施例提供的延迟多普勒域的导频资源复用的示意图；如图5所示，导频是一个基于由特定方式生成的PN(persudo noise，伪随机)序列构造出的导频序列，并按照特定规则映射在延迟多普勒平面上的二维资源格上，即图中的斜线阴影部分。本申请中，可以将导频序列所占据的资源位置，即斜线阴影部分称为导频资源块。导频资源块旁边的无阴影区域为导频保护带，由未发送任何信号/数据的空白资源元素组成。类似于前述的单点导频，环绕其周边的也设有保护带，以避免与数据的相互干扰。保护带宽度的计算方法与图5单点导频映射模式中的方法相同。区别在于，在导频序列所映射的资源部分，不同端口的导频信号可以选取低相关度的序列来生成，在同一块资源上叠加映射，然后在接收端端通过特定算法进行导频序列的检测，从而区分出不同天线端口对应的导频。由于在发送端进行了完全的资源复用，多天线端口系统下的导频开销可以得到大大减少。
图6是本申请实施例提供的导频序列的检测示意图，如图6所示，呈现了基于序列导频的检测方式。在接收端，由于信道的两条路径的不同延迟和多普勒频移，接收的导频信号块在延迟多普勒整体偏移到了图中斜线阴影部分(即标号为2的方块以及与该方块相邻的8个方块，以及，标号为3的方块以及与该方块相邻的8个方块)的方块位置。此时在接收端利用已知发送导频(图中横线阴影部分，即标号为1的方块以及与该方块相邻的8个方块)，在延迟多普勒域进行滑窗检测运算。已知滑窗检测运算结果M(R,S)[δ,ω]在N P→+∞时，具有如下性质(以下公式成立的概率趋近于1)：
Figure PCTCN2022077886-appb-000005
其中
Figure PCTCN2022077886-appb-000006
C＞0为某个常数。
公式中(δ,ω)和(δ 0,ω 0)分别为滑动窗当前(中心点)所在位置，和接收信号中导频信号块(中心点)偏移到的位置。由公式可以看出，只有当(δ,ω)＝(δ 0,ω 0)时，才能得到一个位于1附近的值，反之，滑窗检测运算结果是一个较小的值。因此，当滑动窗(图中横线阴影部分，即标号为1的方块以及与该方块相邻的8个方块)正好与偏移的导频信号块(图中斜线阴影部分，即标号为2的方块以及与该方块相邻的8个方块，以及，标号为3的方块以及与该方块相邻的8个方块)重合时，检测机会运算出一个能量峰值，呈现在延迟多普勒域的(δ 0,ω 0)位置，即图中的标号为2和标号为3的小方块的位置。利用这种方法，只要保证N P具有足够的长度，接收端就可以根据M(R,S)的值获取正确的导频位置，即获取信道的延迟和多普勒信息。同时，信道的幅度值由检测运算得到的
Figure PCTCN2022077886-appb-000007
值给出。
延迟多普勒域中，构造导频(或参考信号)序列的一般方法如下。首先，生成基序列。基序列可以采用ZC序列或者PN序列。其中PN序列包括以下序列：M序列，Gold序列，Kasami序列，Barker序列等。然后，对基序列进行调制生成导频序列。可选的，还可以对导频序列使用OCC进一步提升正交性。
图7是本申请实施例提供的同步信号设计示意图，如图7所示，LTE和NR的初始接入，都依托于同步信号(包括PSS和SSS)进行，其中，PSS为主同步信号，用来寻找帧边界(定时同步)。SSS为辅同步信号，与PSS一起指示了Cell ID。PBCH为物理广播信道，其中的MIB消息和DMRS传递了最重要的一部分系统消息，用于后续的随机接入和数据传输。
NR中的初始接入技术的体系主要基于SSB的设计展开。基站按照协议设定的原则(例如时频域资源位置，发送周期，同步信号生成方式等) 周期性的发送用于初始接入的SSB。其主要流程如下：
1)初始搜网：包括SSB同步和系统信息的接收。具体地，可以先接收主同步信息PSS，再接收辅同步信息SSS，再接收PBCH：获取SSB index，以及PBCH DMRS和MIB中的信息。
2)根据上述获取到的信息再接收广播的系统信息(system information,SI)，其中包括接入系统所需信息。
3)根据上述所获得的系统接入所需信息进行随机接入。
以上是NR单基站小区中的初始接入流程。UE仅接受来自当前小区的SSB，利用检测SSB中的同步信号(包括PSS和SSS)，以及PBCH中的参考信号(DMRS)和数据信息(MIB)来获取获得系统信息，从而通过发送上行消息开展进一步的随机接入。在上述流程中，用来进行同步的导频(PSS和SSS)与蕴含了系统消息的数据部分(PBCH中的内容)是紧密耦合的。
在上述的初始接入流程中，首先需要进行的是主同步信号及PSS的检测，包括：
1)基站按照协议设定的原则(例如时频域资源位置，发送周期，同步信号生成方式等)周期性的发送用于初始接入的SSB
2)由于在初始接入阶段，UE并没有帧定时边界的先验信息，所以UE需要根据协议定义的SSB映射和发送规则，对接收到的时域采样点进行滑动窗检测。具体来说：
1)UE缓存一段足够长的时域采样点。
2)UE根据协议确定的同步信号序列，生成用于检测的本地时域样点
3)UE定义一个滑动检测窗，在所缓存的时域采样点上逐样点滑动。每滑动一个样点，用滑动检测窗内的当前缓存时域采样点与本地时域样点做相关运算，获得相关峰值。
4)滑窗遍历所有缓存时域采样点后，我们获取了一组相关峰值。找 到最大的相关峰值对应的滑动窗在缓存时域采样点的位置，即找到了同步信号在时域采样点上的位置。
5)根据协议规定的帧结构，即同步信号在子帧/时隙中的映射位置，我们就可以推算出帧边界在哪里，即实现了同步定时。
图8是本申请实施例提供的同步信号传输方法的流程示意图之一，如图8所示，该方法包括如下步骤：
步骤800，第一通信设备生成映射在延迟多普勒域的同步信号序列；
步骤810，第一通信设备对所述同步信号序列的时域采样点进行传输。
可选地，本申请实施例可以应用于下行链路，第一通信设备可以是网络侧设备，比如基站，此时其通信对端即第二通信设备可以是终端UE。
可选地，本申请实施例可以应用于旁链路，第一通信设备可以是终端UE，此时其通信对端即第二通信设备可以是终端UE。
可选地，本申请实施例中，第一通信设备可以称为发送端，第二通信设备可以称为接收端。
可选地，第一通信设备可以采用基于序列的用于OTFS调制的同步信号序列。
可选地，同步信号序列基于具有良好自相关和互相关性能的序列生成，第一通信设备调制同步信号序列后，可以将其映射到延迟多普勒域资源格上，然后将同步信号序列从延迟多普勒域转换到时域进行传输。
可选地，同步信号序列通过导频帧进行传输。
可选地，同步信号序列经OTFS系统基带处理变化为发送的时域采样点后，仍能保持良好的自相关及互相关性能。因此，第二通信设备即接收端可以基于接收到的时域采样点直接进行同步信号的检测，获取同步定时，不需要额外的处理步骤。
图9是本申请实施例提供的OTFS系统的工程实现的示意图；如图9所示，左半部分是OTFS基带处理的完整流程，而右半部分是OTFS基带 处理的简化流程。以图9为例，在完整流程中，映射在一个2048×128的延迟多普勒资源格上的数据集X，需要经历一个ISFFT变换到时频域，其中所述ISFFT由对每列元素做的2048点的FFT和对每行元素做的128点的IFFT组成。得到时频域的数据集X TF。
可选地，X TF的矩阵表达式即为：
Figure PCTCN2022077886-appb-000008
其中F N为矩阵形式的DFT算子，左乘表示对矩阵进行逐行DFT，右乘表示对矩阵进行逐列DFT。X TF在发送时需要转化为时域采样点发送，该转化过程即图9中的Heisenberg transform。具体操作为，对X TF的每列进行2048点的IFFT运算，然后逐列成型滤波，得到处理后的矩阵S。将S向量化后即得到所发送的时域采样点。
可选地，S的矩阵表达式即为：
Figure PCTCN2022077886-appb-000009
由此，可以得到了实际发送的时域脉冲序列S和延迟多普勒域数据集X之间的简洁输入输出关系。根据这种关系，实际的工程实现可以简化为图9的右半部分。即对数据集X逐行做128点的IFFT，然后逐列成型滤波，向量化后发送。
可选地，本申请实施例提出了一种OTFS调制系统中，延迟多普勒域的同步信号设计方案，用于UE的初始接入。
可选地，本申请实施例针对OTFS调制，设计专属的同步机制，从而更好地利用OTFS系统的优点。
本申请实施例通过采用同步信号序列作为同步信号在延迟多普勒域进行传输，保持同步信号良好的自相关及互相关性能，简化了接收侧的同步检测步骤，适用于简化的OTFS工程实现，避免了在时频域插入同步信号造成的额外复杂度。
可选地，所述生成映射在延迟多普勒域的同步信号序列，包括：
不在所述延迟多普勒域的资源格上为所述同步信号序列预留保护带；或者，在所述延迟多普勒域的资源格上为所述同步信号序列预留保护带。
可选地，所述生成映射在延迟多普勒域的同步信号序列，包括：
在所述同步信号序列仅用于同步定时的情况下，不在所述延迟多普勒域的资源格上为所述同步信号序列预留保护带。
可选地，在所述同步信号序列仅用于同步定时的情况下，即该同步信号所在的导频帧中只含有导频且仅用于寻找同步定时，即接收侧无需利用该导频进行(延迟多普勒域)信道估计。因此无需为同步信号序列的映射预留保护带。
可选地，由于可以不需要考虑保护带，因此可以在同样大小的资源中放置更多的导频符号，从而增强检测性能；利用导频序列组合额外携带一些信息比特。
可选地，所述生成映射在延迟多普勒域的同步信号序列，包括：
在所述同步信号序列用于同步定时且用于获取信道质量相关信息的情况下，在所述延迟多普勒域的资源格上为所述同步信号序列预留保护带。
可选地，在所述同步信号序列用于同步定时且用于获取信道质量相关信息的情况下，即该同步信号所在的导频帧只含有导频，且在延迟和多普勒维度均预留了足够的保护带用于信道估计，提供类似于NR中CSI-RS的功能。
可选地，基于同步信号序列寻找到帧定时之后，可以进一步进行信道估计，从而获取CSI。
可选地，所述生成映射在延迟多普勒域的同步信号序列，包括：
在所述同步信号序列用于同步定时且用于获取信道质量相关信息，且所述同步信号序列所在的导频帧中包括数据信号的情况下，在所述同步信号序列所映射的资源格和所述数据信号所映射的资源格之间预留保护带。
可选地，在所述同步信号序列用于同步定时且用于获取信道质量相关信息，且所述同步信号序列所在的导频帧中包括数据信号的情况下，即该同步信号所在的导频帧既含有导频，也含有数据(类似于NR的SSB中的系统消息)。
可选地，基于同步信号序列寻找到帧定时之后，可以进一步进行信道估计，从而获取CSI。再根据获得的CSI，解调数据部分，获得系统信息。
可选地，接收侧可以首先利用该导频(同步信号序列)检测出帧定时，然后进一步利用该导频在延迟多普勒域进行信道估计，用来解调数据部分。因此导频和数据之间需要预留保护带，且数据分布在C个delay tap和D个Doppler tap。其中，C和D的大小，主要取决于需要发送的数据样点的大小；比如需要传送的信息比特为N个，选用的码率为a，选用的调制阶数为M-QAM，则需要传送的样点数为K＝N/a/log_2(M)。则可以把这K个QAM符号映射在延迟多普勒域上，K＝C×D。
可选地，delay tap可以指延迟抽头，即延迟多普勒资源格的延迟维度坐标。
可选地，delay tap可以指在一个多普勒维度坐标下，部分或所有的延迟多普勒资源格的延迟维度坐标。
可选地，导频帧可以承载多种功能：获取定时同步；获取精确的CSI；以及服务于后续时隙内的用户数据解调(利用QCL关系)；用于后续时隙内的导频资源自适应；同步定时后，恢复出延迟多普勒域资源格，利用导频做信道估计，用以解调帧内数据。
可选地，所述生成映射在延迟多普勒域的同步信号序列，包括：
基于信道质量相关信息，确定所述同步信号序列映射到延迟多普勒域的资源格模式。
可选地，在所述第一通信设备获取到信道质量相关信息的情况下，可以基于所述信道质量相关信息，确定所述同步信号序列映射到延迟多普勒域的资源格模式。
可选地，由于OTFS基带处理中的ISFFT操作，等效于利用DFT算子对信号进行的一种二维扩频操作，增加了承载信息的样点数，因此会增加收端检测的复杂度。因此可以针对OTFS基带信号处理的特点，通过设计信号在延迟多普勒域映射的特殊模式pattern，可以达到减少接收机测序 列检测复杂度的效果，更有利于该技术的推广应用。
可选地，可以在一个M×N的延迟多普勒平面上定义了一个导频序列X用于同步检测。则含有X序列信息的时域采样点分布与X在延迟多普勒域上的映射具有对应关系。
图10是本申请实施例提供的延迟多普勒域序列变换为时域采样点的示意图，如图10所示，为两种映射方式下延迟多普勒域序列变换为时域采样点的变换过程。
可选地，映射方式一：基带处理过程是对延迟多普勒域数据集逐行进行IFFT，因此，可以将导频X按行映射到大小为M×N延迟多普勒域平面上，即仅映射到某一个delay tap对应的行上，则变换到delay-time域之后仅在某一个delay tap上有导频X的信息，记作X dt，且X dt的长度为N。经向量化后的获得的时域采样点上，体现为X dt按照一定间隔均匀分布在MN×1的发送采样点上，如图10左侧所示。
可选地，映射方式二：当导频X按列映射在延迟多普勒平面上时，即仅映射到某一个Doppler tap对应的列上，经过逐行IFFT之后，其信息被扩展到delay-time域上多个delay tap的所有样点上，这些样点记作X dt。在图10右侧所示的极端情况下，X的信息扩展到了在M个delay tap的所有样点，即X dt分布在向量化后获得的所有时域采样点上，此时X dt的长度为MN。
可选地，在采用映射方式一时，接收侧在对收到的样点数进行检测时，只需要在适当位置抽取较少的样点数进行检测；而在采用映射方式二时，接收侧需要对较多的样点进行检测。
可选地，若导频X在延迟多普勒域的映射仅存在于Q个delay tap上，则接收侧所需要检测的样点个数为QN个。且在接收侧的样点的样点间隔为M-Q。
可选地，假设延迟多普勒域坐标原点为延迟多普勒域的资源格左上角的顶点，则导频X可以从第P个delay tap开始映射，则X dt在当前时隙的MN×1个时域采样点中出现的起始位置为P。
可选地，当导频映射方式已知时，接收机侧可以获得X dt在接收时域采样点的位置的先验信息，即X dt在当前时隙所有时域采样点中的坐标位置为：
[P,P+(M-Q+1),…,P+(N-1)(M-Q+1)]；
此外，考虑到导频设计的开销，所述开销包括导频序列本身的开销和导频序列保护带的开销。
图11是本申请实施提供的导频开销示意图，如图11，导频可以以矩形pattern映射在延迟多普勒域的资源格上，且该资源格上仅存在导频，不包含数据。
可选地，导频的总长度为L，并且存在于Q个delay tap上，则易知导频存在在
Figure PCTCN2022077886-appb-000010
个Doppler tap上。假设导频保护带在delay维度的宽度为A，在Doppler维度的宽度为B，导频的总开销为：
Figure PCTCN2022077886-appb-000011
因此，最小化导频开销等价于求解如下最小化问题：
Figure PCTCN2022077886-appb-000012
因此，可以确定当前最优化的导频映射方式，即为：
Figure PCTCN2022077886-appb-000013
其中，Q是映射的资源块的边长；
可选地，由于接收机侧所需要检测的样点个数为QN个，
Figure PCTCN2022077886-appb-000014
向下取整以使X dt占用尽可能少的delay tap，可以减少接收机侧检测复杂度。
可选地，可以在第一通信设备比如基站具有信道的先验信息时，即(τ max,v max)，可以先据此确定(A,B)，从而计算出较优的Q，确定导频信号 的映射模式。
比如，当第一通信设备为基站时，可以在基站具有信道的先验信息时，即(τ max,v max)，可以先据此确定(A,B)，从而计算出较优的Q，确定导频信号的映射模式。
可选地，在导频帧中只含有导频且仅用于寻找同步定时，即接收机侧无需利用该导频进行(延迟多普勒域)信道估计。因此无需预留保护带。导频映射方案的设计准则为：
Figure PCTCN2022077886-appb-000015
可选地，在用于同步的导频帧中既含有导频(同步信号序列)，也含有数据(类似于NR的SSB中的系统消息)。接收侧可以利用该导频检测出帧定时，然后进一步利用该导频在延迟多普勒域进行信道估计，用来解调数据部分。因此导频和数据之间需要预留保护带，且数据分布在C个delay tap和D个Doppler tap。相应地，最小化导频开销等价于求解如下最小化问题，
Figure PCTCN2022077886-appb-000016
其中，
Figure PCTCN2022077886-appb-000017
可选地，所述基于所述信道质量相关信息，确定所述同步信号序列映射到延迟多普勒域的资源格模式，包括：
基于最近获取的一个信道质量相关信息，确定所述同步信号序列映射到延迟多普勒域的资源格模式；或
基于获取的至少两个信道质量相关信息中最大的信道质量相关信息，确定所述同步信号序列映射到延迟多普勒域的资源格模式；或
基于获取的至少两个信道质量相关信息的平均值，确定所述同步信号序列映射到延迟多普勒域的资源格模式。
可选地，第一通信设备在基于所述信道质量相关信息，确定所述同步信号序列映射到延迟多普勒域的资源格模式时，可以基于最近获取的一个信道质量相关信息，确定所述同步信号序列映射到延迟多普勒域的资源格模式。
比如，可以采用第k个同步导频测得的(τ max,v max)值，确定第k到第k+1个导频帧所用的导频保护带大小，即计算Q。
可选地，第一通信设备在基于所述信道质量相关信息，确定所述同步信号序列映射到延迟多普勒域的资源格模式时，可以基于获取的至少两个信道质量相关信息中最大的信道质量相关信息，确定所述同步信号序列映射到延迟多普勒域的资源格模式；
比如，可以在连续多个同步导频测量的几组(τ max,v max)中，取最大值，然后基于该最大值确定所述同步信号序列映射到延迟多普勒域的资源格模式，即计算Q。
可选地，第一通信设备在基于所述信道质量相关信息，确定所述同步信号序列映射到延迟多普勒域的资源格模式时，可以基于获取的至少两个信道质量相关信息的平均值，确定所述同步信号序列映射到延迟多普勒域的资源格模式。
比如，可以在连续多个同步导频测量的几组(τ max,v max)中，取平均值，基于该平均值确定所述同步信号序列映射到延迟多普勒域的资源格模式，即计算Q。
可选地，本申请实施例中，在某一次或多次基于导频(比如同步信号序列)进行了信道估计后获得的信质量相关信息，可以用于后续时隙内的导频资源自适应，比如作为先验知识用于第一通信设备确定导频映射模式；即利用CSI信息中的最大延迟和最大多普勒信息，即(τ max,v max)，确定后续时隙内导频保护带模式。
可选地，保护带模式可以包括保护带的大小，还可以包括保护带的形状。
可选地，所述生成映射在延迟多普勒域的同步信号序列，包括：
将所述同步信号序列映射到延迟多普勒域的资源格上的任意一个delay tap对应的行上。
可选地，在所述第一通信设备没有获取信道质量相关信息的情况下，将所述同步信号序列映射到延迟多普勒域的资源格上的任意一个delay tap对应的行上。
可选地，基站不具备信道的先验信息时，则直接采用图10中的映射方式一或映射方式二。
可选地，从减少接收机检测复杂度的角度考虑，可以采用图10中的映射方式一，即将所述同步信号序列映射到延迟多普勒域的资源格上的任意一个delay tap对应的行上。
可选地，所述生成映射在延迟多普勒域的同步信号序列，包括：
基于一个PN序列，生成与物理层标识相关联的同步信号序列。
可选地，同步信号序列可以基于PN序列生成；
可选地，可以基于一个PN序列，生成与物理层标识相关联的同步信号序列由一个PN序列生成，与物理层标识关联。
可选地，本申请各实施例可以应用于下行链路，第一通信设备是网络侧设备，第二通信设备是终端，则物理层标识可以是小区标识Cell ID。
可选地，本申请各实施例可以应用于旁链路，第一通信设备是终端，第二通信设备是终端，则物理层标识可以是Sidelink ID或UE ID。
可选地，所述生成映射在延迟多普勒域的同步信号序列，包括：
基于至少两个PN序列，生成与物理层标识相关联的同步信号序列。
可选地，可以基于至少两个PN序列，生成与物理层标识相关联的同步信号序列。
比如，可以由两个或者三个PN序列生成同步信号序列，多个PN序 列共同指示Cell ID或共同指示Sidelink ID或UE ID。
可选地，所述至少两个PN序列中的每一个PN序列生成的部分同步信号序列，分别与所述物理层标识中的部分所述物理层标识相关联。
可选地，至少两个PN序列中的每一个PN序列生成的同步信号序列中对应的部分，可以一部分物理层标识相关联。
可选地，生成同步信号序列的多个PN序列中，每个PN序列可以与一部分的物理层标识相关联。
比如，生成同步信号序列的多个PN序列中，每个PN序列可以与一部分的Cell ID相关联。
比如，生成同步信号序列的多个PN序列中，每个PN序列可以与一部分的Sidelink ID或UE ID相关联。
可选地，所述基于至少两个PN序列，生成与物理层标识相关联的同步信号序列，包括：
所述至少两个PN序列交织放置，其中，所述至少一个PN序列的交织方式与物理层标识或部分所述物理层标识相关联；或
所述至少两个PN序列首尾相连放置。
可选地，基于至少两个PN序列，生成与物理层标识相关联的同步信号序列时，可以多个PN序列交织放置，生成同步信号序列，其交织方式与物理层标识或部分所述物理层标识相关联。
可选地，基于至少两个PN序列，生成与物理层标识相关联的同步信号序列时，可以多个PN序列按照固定的规则交织放置或者顺序相连，生成同步信号序列。
可选地，基于至少两个PN序列，生成与物理层标识相关联的同步信号序列时，所述至少两个PN序列可以首尾相连放置，生成同步信号序列。
可选地，所述至少两个PN序列中的每一个PN序列生成的部分同步信号，与物理层标识相关联。
可选地，基于至少两个PN序列，生成与物理层标识相关联的同步信 号序列时，至少两个PN序列中的每一个PN序列与全部物理层标识相关联。
可选地，用以生成同步信号序列的LFSR可以相同也可以不同。
可选地，所述基于至少两个PN序列，生成与物理层标识相关联的同步信号序列，包括：
所述至少两个PN序列交织放置，其中，所述至少一个PN序列的交织方式与物理层标识或部分所述物理层标识相关联；或
从预先设置的一行资源格开始，所述至少两个PN序列依次映射在所述一行资源格之后的至少两行资源格上，且所述至少两行资源格中的每一行资源格映射所述至少两个PN序列中的一个PN序列，其中，所述预先设置的一行资源格的位置与所述通信对端的相关联。
可选地，在基于至少两个PN序列，生成与物理层标识相关联的同步信号序列时，至少两个PN序列中的每一个PN序列与全部物理层标识相关联，其中，多个PN序列可以交织放置，其交织方式与物理层标识相关联。
可选地，可选地，在基于至少两个PN序列，生成与物理层标识相关联的同步信号序列时，至少两个PN序列中的每一个PN序列与全部物理层标识相关联，其中，可以从预先设置的一行资源格开始，至少两个PN序列依次映射在该行资源格之后的至少两行资源格上，且至少两行资源格依次映射该至少两个PN序列，其中，所述预先设置的一行资源格的位置与所述通信对端的相关联，比如，可以从delay tap k开始，两个或者三个PN序列分别映射在delay tap(k，k+1)或(k，k+1，k+2)上。其中，k与物理层标识相关联。
可选地，所述同步信号分为第一部分和第二部分；
所述第一部分用于作为同步信号进行同步定时；
所述第二部分用于指示物理层标识。
可选地，一个或多个PN序列生成的同步信号序列中，可以仅使用一 部分用作定时盲检；另一部分在找到同步定时后，用于进行信息比特的检测，比如用于指示物理层标识。
本申请实施例通过采用同步信号序列作为同步信号在延迟多普勒域进行传输，保持同步信号良好的自相关及互相关性能，简化了接收侧的同步检测步骤，适用于简化的OTFS工程实现，避免了在时频域插入同步信号造成的额外复杂度。
图12是本申请实施例提供的同步信号传输方法的流程示意图之二，如图12所示，该方法包括如下步骤：
步骤1200，第二通信设备接收同步信号序列的时域采样点；
步骤1210，对所述同步信号序列的时域采样点进行同步定时检测。
可选地，本申请实施例可以应用于下行链路，第一通信设备可以是网络侧设备，比如基站，第二通信设备可以是终端UE。
可选地，本申请实施例可以应用于旁链路，第一通信设备可以是终端UE，第二通信设备可以是终端UE。
可选地，本申请实施例中，第一通信设备可以称为发送端，第二通信设备可以称为接收端。
可选地，第一通信设备可以采用基于序列的用于OTFS调制的同步信号序列，在延迟多普勒域发送给第二通信设备，第二通信设备在延迟多普勒域接收同步信号序列后，可以对所述同步信号序列的时域采样点进行同步定时检测。
可选地，同步信号序列基于具有良好自相关和互相关性能的序列生成，第一通信设备调制同步信号序列后，可以将其映射到延迟多普勒域资源格上进行传输。
可选地，同步信号序列通过导频帧进行传输。
可选地，同步信号序列经OTFS系统基带处理变化为发送的时域采样点后，仍能保持良好的自相关及互相关性能。因此，第二通信设备即接收端可以基于接收到的时域采样点直接进行同步信号的检测，获取同步定时， 不需要额外的处理步骤。
可选地，本申请实施例提出了一种OTFS调制系统中，延迟多普勒域的同步信号设计方案，用于UE的初始接入。
可选地，本申请实施例针对OTFS调制，设计专属的同步机制，从而更好地利用OTFS系统的优点。
本申请实施例通过采用同步信号序列作为同步信号在延迟多普勒域进行传输，保持同步信号良好的自相关及互相关性能，简化了接收侧的同步检测步骤，适用于简化的OTFS工程实现，避免了在时频域插入同步信号造成的额外复杂度。
可选地，所述对所述同步信号序列的时域采样点进行同步定时检测，包括：
在所述第二通信设备具有导频映射相关信息的情况下，基于所述导频映射相关信息对所述同步信号序列进行采样获得所述时域采样点；
对所述时域采样点进行同步定时检测。
可选地，第二通信设备比如UE在具有导频映射相关信息时，可以抽取特定位置的总长度为QN的时域采样点进行检测。
可选地，可以基于导频映射相关信息对所述同步信号序列进行采样获得采样点。
可选地，导频映射相关信息可以是导频映射先验信息；
可选地，在以下情况下第二通信设备可以具有导频映射相关信息：
1)系统可以只支持一种导频映射信息，或者用于同步的导频有一种公知的默认映射方式。
2)系统可以支持几种导频映射方式，第二通信设备可以进行遍历搜索。
3)第二通信设备可以具有第一通信设备导频映射配置的先验信息。例如第二通信设备可能之前连接过第一通信设备，后来处于idle态，现在需要同步重新建立连接，而保留了上次的配置信息。
可选地，所述对所述同步信号序列的时域采样点进行同步定时检测，包括：
在所述第二通信设备不具有导频映射相关信息的情况下，对所述同步信号序列的所有时域采样点进行同步定时检测。
可选地，第二通信设备比如UE在具有导频映射相关信息时，可以对长度为MN的时域采样点进行检测。
可选地，可以基于导频映射相关信息对所述同步信号序列的所有时域采样点进行同步定时检测。
可选地，在以下情况下第二通信设备可能不具有导频映射相关信息：第二通信设备开机，第一次接入第一通信设备，没有任何先验信息。
可选地，所述方法还包括：
在所述同步信号序列用于同步定时且用于获取信道质量相关信息的情况下，基于所述同步信号序列，确定信道质量相关信息。
可选地，在同步信号序列用于同步定时且用于获取信道质量相关信息的情况下，可以基于所述同步信号序列，确定信道质量相关信息。
可选地，在同步信号序列用于同步定时且用于获取信道质量相关信息，且同步信号序列所在的导频帧还包括数据的情况下，可以基于所述同步信号序列，确定信道质量相关信息。
可选地，基于同步信号序列寻找到帧定时之后，可以进一步进行信道估计，从而获取CSI。
可选地，所述方法还包括：
在所述同步信号序列所在的导频帧中包括数据信号的情况下，基于所述信道质量相关信息，解调所述数据信号。
可选地，在同步信号序列用于同步定时且用于获取信道质量相关信息，且同步信号序列所在的导频帧还包括数据的情况下，可以基于所述同步信号序列，确定信道质量相关信息。
可选地，导频帧可以承载多种功能：获取定时同步；获取精确的CSI； 以及服务于后续时隙内的用户数据解调(利用QCL关系)；用于后续时隙内的导频资源自适应；同步定时后，恢复出延迟多普勒域资源格，利用导频做信道估计，用以解调帧内数据。
本申请实施例通过采用同步信号序列作为同步信号在延迟多普勒域进行传输，保持同步信号良好的自相关及互相关性能，简化了接收侧的同步检测步骤，适用于简化的OTFS工程实现，避免了在时频域插入同步信号造成的额外复杂度。
需要说明的是，本申请实施例提供的同步信号传输方法，执行主体可以为同步信号传输装置，或者，该同步信号传输装置中的用于执行同步信号传输方法的控制模块。本申请实施例中以同步信号传输装置执行同步信号传输方法为例，说明本申请实施例提供的同步信号传输装置。
图13是本申请实施例提供的同步信号传输装置的结构示意图之一，如图13所示，该装置包括：第一生成模块1310，和第一传输模块1320；其中：
第一生成模块1310用于第一通信设备生成映射在延迟多普勒域的同步信号序列；
第一传输模块1320用于第一通信设备对所述同步信号序列的时域采样点进行传输。
可选地，同步信号传输装置可以通过第一生成模块1310生成映射在延迟多普勒域的同步信号序列；然后可以通过第一传输模块1320对所述同步信号序列的时域采样点进行传输。
本申请实施例通过采用同步信号序列作为同步信号在延迟多普勒域进行传输，保持同步信号良好的自相关及互相关性能，简化了接收侧的同步检测步骤，适用于简化的OTFS工程实现，避免了在时频域插入同步信号造成的额外复杂度。
可选地，所述第一生成模块用于：
不在所述延迟多普勒域的资源格上为所述同步信号序列预留保护带； 或者，在所述延迟多普勒域的资源格上为所述同步信号序列预留保护带。
可选地，所述第一生成模块用于：
在所述同步信号序列仅用于同步定时的情况下，不在所述延迟多普勒域的资源格上为所述同步信号序列预留保护带。
可选地，所述第一生成模块用于：
在所述同步信号序列用于同步定时且用于获取信道质量相关信息的情况下，在所述延迟多普勒域的资源格上为所述同步信号序列预留保护带。
可选地，所述第一生成模块用于：
在所述同步信号序列用于同步定时且用于获取信道质量相关信息，且所述同步信号序列所在的导频帧中包括数据信号的情况下，在所述同步信号序列所映射的资源格和所述数据信号所映射的资源格之间预留保护带。
可选地，所述第一生成模块用于：
基于信道质量相关信息，确定所述同步信号序列映射到延迟多普勒域的资源格模式。
可选地，所述第一生成模块用于：
基于最近获取的一个信道质量相关信息，确定所述同步信号序列映射到延迟多普勒域的资源格模式；或
基于获取的至少两个信道质量相关信息中最大的信道质量相关信息，确定所述同步信号序列映射到延迟多普勒域的资源格模式；或
基于获取的至少两个信道质量相关信息的平均值，确定所述同步信号序列映射到延迟多普勒域的资源格模式。
可选地，所述第一生成模块用于：
将所述同步信号序列映射到延迟多普勒域的资源格上的任意一个delay tap对应的行上。
可选地，所述第一生成模块用于：
基于一个PN序列，生成与物理层标识相关联的同步信号序列。
可选地，所述第一生成模块用于：
基于至少两个PN序列，生成与物理层标识相关联的同步信号序列。
可选地，所述至少两个PN序列中的每一个PN序列生成的部分同步信号序列，分别与所述物理层标识中的部分所述物理层标识相关联。
可选地，所述第一生成模块用于：
所述至少两个PN序列交织放置，其中，所述至少一个PN序列的交织方式与所述通信对端的物理层标识或部分所述物理层标识相关联；或
所述至少两个PN序列首尾相连放置。
可选地，所述至少两个PN序列中的每一个PN序列生成的部分同步信号，与所述物理层标识相关联。
可选地，所述第一生成模块用于：
所述至少两个PN序列交织放置，其中，所述至少一个PN序列的交织方式与所述物理层标识或部分所述物理层标识相关联；或
从预先设置的一行资源格开始，所述至少两个PN序列依次映射在所述一行资源格之后的至少两行资源格上，且所述至少两行资源格中的每一行资源格映射所述至少两个PN序列中的一个PN序列，其中，所述预先设置的一行资源格的位置与所述通信对端的相关联。
可选地，所述同步信号分为第一部分和第二部分；
所述第一部分用于作为同步信号进行同步定时；
所述第二部分用于指示物理层标识。
本申请实施例通过采用同步信号序列作为同步信号在延迟多普勒域进行传输，保持同步信号良好的自相关及互相关性能，简化了接收侧的同步检测步骤，适用于简化的OTFS工程实现，避免了在时频域插入同步信号造成的额外复杂度。
本申请实施例中的同步信号传输装置可以是电子设备，也可以是电子设备中的部件，例如集成电路或芯片。该电子设备可以是终端，也可以为除终端之外的其他设备。示例性的，电子设备可以为手机、平板电脑、笔记本电脑、掌上电脑、车载电子设备、移动上网装置(Mobile Internet Device，MID)、 增强现实(augmented reality，AR)/虚拟现实(virtual reality，VR)设备、机器人、可穿戴设备、超级移动个人计算机(ultra-mobile personal computer，UMPC)、上网本或者个人数字助理(personal digital assistant，PDA)等，还可以为服务器、网络附属存储器(Network Attached Storage，NAS)、个人计算机(personal computer，PC)、电视机(television，TV)、柜员机或者自助机等，本申请实施例不作具体限定。
本申请实施例中的同步信号传输装置可以为具有操作系统的装置。该操作系统可以为安卓(Android)操作系统，可以为ios操作系统，还可以为其他可能的操作系统，本申请实施例不作具体限定。
本申请实施例提供的同步信号传输装置能够实现图9-图11的方法实施例实现的各个过程，并达到相同的技术效果，为避免重复，这里不再赘述。
图14是本申请实施例提供的同步信号传输装置的结构示意图之二，如图14所示，该装置包括：第一接收模块1410和第一检测模块1420，其中：
第一接收模块1410用于第二通信设备接收同步信号序列的时域采样点；
第一检测模块1420用于第二通信设备对所述同步信号序列的时域采样点进行同步定时检测。
可选地，同步信号传输装置可以通过第一接收模块1410接收同步信号序列的时域采样点；然后可以通过第一检测模块1420对所述同步信号序列的时域采样点进行同步定时检测。
本申请实施例通过采用同步信号序列作为同步信号在延迟多普勒域进行传输，保持同步信号良好的自相关及互相关性能，简化了接收侧的同步检测步骤，适用于简化的OTFS工程实现，避免了在时频域插入同步信号造成的额外复杂度。
可选地，所述第一检测模块用于：
在所述第二通信设备具有导频映射相关信息的情况下，基于所述导频映射相关信息对所述同步信号序列进行采样获得所述时域采样点；
对所述时域采样点进行同步定时检测。
可选地，所述第一检测模块用于：
在所述第二通信设备不具有导频映射相关信息的情况下，对所述同步信号序列的所有时域采样点进行同步定时检测。
可选地，所述装置还包括：
第一确定没看，用于在所述同步信号序列用于同步定时且用于获取信道质量相关信息的情况下，基于所述同步信号序列，确定信道质量相关信息。
可选地，所述装置还包括：
第一解调模块，用于在所述同步信号序列所在的导频帧中包括数据信号的情况下，基于所述信道质量相关信息，解调所述数据信号。
本申请实施例通过采用同步信号序列作为同步信号在延迟多普勒域进行传输，保持同步信号良好的自相关及互相关性能，简化了接收侧的同步检测步骤，适用于简化的OTFS工程实现，避免了在时频域插入同步信号造成的额外复杂度。
本申请实施例中的同步信号传输装置可以是装置，也可以是终端中的部件、集成电路、或芯片。该装置可以是移动终端，也可以为非移动终端。示例性的，移动终端可以包括但不限于上述所列举的终端11的类型，非移动终端可以为服务器、网络附属存储器(Network Attached Storage，NAS)、个人计算机(personal computer，PC)、电视机(television，TV)、柜员机或者自助机等，本申请实施例不作具体限定。
本申请实施例中的同步信号传输装置可以为具有操作系统的装置。该操作系统可以为安卓(Android)操作系统，可以为ios操作系统，还可以为其他可能的操作系统，本申请实施例不作具体限定。
本申请实施例提供的同步信号传输装置能够实现图12的方法实施例 实现的各个过程，并达到相同的技术效果，为避免重复，这里不再赘述。
可选的，图15是本申请实施例提供的通信设备的结构示意图，如图15所示，通信设备1500，包括处理器1501，存储器1502，存储在存储器1502上并可在所述处理器1501上运行的程序或指令，例如，该通信设备1500为终端时，该程序或指令被处理器1501执行时实现上述方法实施例的各个过程，且能达到相同的技术效果。该通信设备1500为网络侧设备时，该程序或指令被处理器1501执行时实现上述方法实施例的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。
可选地，第二通信设备可以为终端，第一通信设备可以为网络侧设备；
可选地，第一通信设备可以为终端，第二通信设备可以为终端。
图16是本申请实施例提供的终端的硬件结构示意图。
该终端1600包括但不限于：射频单元1601、网络模块1602、音频输出单元1603、输入单元1604、传感器1605、显示单元1606、用户输入单元1607、接口单元1608、存储器1609、以及处理器1610等中的至少部分部件。
本领域技术人员可以理解，终端1600还可以包括给各个部件供电的电源(比如电池)，电源可以通过电源管理系统与处理器1610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。图16中示出的终端结构并不构成对终端的限定，终端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，在此不再赘述。
应理解的是，本申请实施例中，输入单元1604可以包括图形处理器(Graphics Processing Unit，GPU)16041和麦克风16042，图形处理器16041对在视频捕获模式或图像捕获模式中由图像捕获装置(如摄像头)获得的静态图片或视频的图像数据进行处理。显示单元1606可包括显示面板16061，可以采用液晶显示器、有机发光二极管等形式来配置显示面板16061。用户输入单元1607包括触控面板16071以及其他输入设备16072。触控面板16071，也称为触摸屏。触控面板16071可包括触摸检测装置和 触摸控制器两个部分。其他输入设备16072可以包括但不限于物理键盘、功能键(比如音量控制按键、开关按键等)、轨迹球、鼠标、操作杆，在此不再赘述。
本申请实施例中，射频单元1601将来自通信对端的信息接收后，给处理器1610处理；另外，将待传输的信息发送给通信对端。通常，射频单元1601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。
存储器1609可用于存储软件程序以及各种数据。存储器1609可主要包括存储程序或指令的第一存储区和存储数据的第二存储区，其中，第一存储区可存储操作系统、至少一个功能所需的应用程序或指令(比如声音播放功能、图像播放功能等)等。此外，存储器1609可以包括易失性存储器或非易失性存储器，或者，存储器1609可以包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(Read-Only Memory，ROM)、可编程只读存储器(Programmable ROM，PROM)、可擦除可编程只读存储器(Erasable PROM，EPROM)、电可擦除可编程只读存储器(Electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(Random Access Memory，RAM)，静态随机存取存储器(Static RAM，SRAM)、动态随机存取存储器(Dynamic RAM，DRAM)、同步动态随机存取存储器(Synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(Double Data Rate SDRAM，DDRSDRAM)、增强型同步动态随机存取存储器(Enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(Synch link DRAM，SLDRAM)和直接内存总线随机存取存储器(Direct Rambus RAM，DRRAM)。本申请实施例中的存储器109包括但不限于这些和任意其它适合类型的存储器。
处理器1610可包括一个或多个处理单元；可选的，处理器1610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涉及操作系统、用户界面和应用程序等的操作，调制解调处理器主要处理无线通信，如基 带处理器。可以理解的是，上述调制解调处理器也可以不集成到处理器1610中。
其中，处理器1610用于：
生成映射在延迟多普勒域的同步信号序列；
对所述同步信号序列的时域采样点进行传输。
本申请实施例通过采用同步信号序列作为同步信号在延迟多普勒域进行传输，保持同步信号良好的自相关及互相关性能，简化了接收侧的同步检测步骤，适用于简化的OTFS工程实现，避免了在时频域插入同步信号造成的额外复杂度。
可选地，处理器1610用于：
不在所述延迟多普勒域的资源格上为所述同步信号序列预留保护带；或者，在所述延迟多普勒域的资源格上为所述同步信号序列预留保护带。
可选地，处理器1610用于：
在所述同步信号序列仅用于同步定时的情况下，不在所述延迟多普勒域的资源格上为所述同步信号序列预留保护带。
可选地，处理器1610用于：
所述在延迟多普勒域对所述同步信号序列进行传输，包括：
在所述同步信号序列用于同步定时且用于获取信道质量相关信息的情况下，在所述延迟多普勒域的资源格上为所述同步信号序列预留保护带。
可选地，处理器1610用于：
在所述同步信号序列用于同步定时且用于获取信道质量相关信息，且所述同步信号序列所在的导频帧中包括数据信号的情况下，在所述同步信号序列所映射的资源格和所述数据信号所映射的资源格之间预留保护带。
可选地，处理器1610用于：
基于信道质量相关信息，确定所述同步信号序列映射到延迟多普勒域的资源格模式。
可选地，处理器1610用于：
基于最近获取的一个信道质量相关信息，确定所述同步信号序列映射到延迟多普勒域的资源格模式；或
基于获取的至少两个信道质量相关信息中最大的信道质量相关信息，确定所述同步信号序列映射到延迟多普勒域的资源格模式；或
基于获取的至少两个信道质量相关信息的平均值，确定所述同步信号序列映射到延迟多普勒域的资源格模式。
可选地，处理器1610用于：
将所述同步信号序列映射到延迟多普勒域的资源格上的任意一个delay tap对应的行上。
可选地，处理器1610用于：
基于一个PN序列，生成与物理层标识相关联的同步信号序列。
可选地，处理器1610用于：
基于至少两个PN序列，生成与物理层标识相关联的同步信号序列。
可选地，所述至少两个PN序列中的每一个PN序列生成的部分同步信号序列，分别与所述物理层标识中的部分所述物理层标识相关联。
可选地，处理器1610用于：
所述至少两个PN序列交织放置，其中，所述至少一个PN序列的交织方式与所述通信对端的物理层标识或部分所述物理层标识相关联；或
所述至少两个PN序列首尾相连放置。
可选地，所述至少两个PN序列中的每一个PN序列生成的部分同步信号，与所述物理层标识相关联。
可选地，处理器1610用于：
所述至少两个PN序列交织放置，其中，所述至少一个PN序列的交织方式与所述物理层标识或部分所述物理层标识相关联；或
从预先设置的一行资源格开始，所述至少两个PN序列依次映射在所述一行资源格之后的至少两行资源格上，且所述至少两行资源格中的每一行资源格映射所述至少两个PN序列中的一个PN序列，其中，所述预先 设置的一行资源格的位置与所述通信对端的相关联。
可选地，所述同步信号分为第一部分和第二部分；
所述第一部分用于作为同步信号进行同步定时；
所述第二部分用于指示物理层标识。
或者，
可选地，处理器1610用于：
接收同步信号序列的时域采样点；
对所述同步信号序列的时域采样点进行同步定时检测。
本申请实施例通过采用同步信号序列作为同步信号在延迟多普勒域进行传输，保持同步信号良好的自相关及互相关性能，简化了接收侧的同步检测步骤，适用于简化的OTFS工程实现，避免了在时频域插入同步信号造成的额外复杂度。
可选地，处理器1610用于：
在所述第二通信设备具有导频映射相关信息的情况下，基于所述导频映射相关信息对所述同步信号序列进行采样获得所述时域采样点；
对所述时域采样点进行同步定时检测。
可选地，处理器1610用于：
在所述第二通信设备不具有导频映射相关信息的情况下，对所述同步信号序列的所有时域采样点进行同步定时检测。
可选地，处理器1610用于：
在所述同步信号序列用于同步定时且用于获取信道质量相关信息的情况下，基于所述同步信号序列，确定信道质量相关信息。
可选地，处理器1610用于：
在所述同步信号序列所在的导频帧中包括数据信号的情况下，基于所述信道质量相关信息，解调所述数据信号。本申请实施例通过采用同步信号序列作为同步信号在延迟多普勒域进行传输，保持同步信号良好的自相关及互相关性能，简化了接收侧的同步检测步骤，适用于简化的OTFS工 程实现，避免了在时频域插入同步信号造成的额外复杂度。
本申请实施例中的终端实施例是与上述方法实施例对应的产品实施例，上述方法实施例中的所有实现方式均适用于该终端实施例，亦可达到相同或相似的技术效果，故在此不再赘述。
图17是本申请实施例提供的网络侧设备的硬件结构示意图。
如图17所示，该网络侧设备1700包括：天线1701、射频装置1702、基带装置1703。天线1701与射频装置1702连接。在上行方向上，射频装置1702通过天线1701接收信息，将接收的信息发送给基带装置1703进行处理。在下行方向上，基带装置1703对要发送的信息进行处理，并发送给射频装置1702，射频装置1702对收到的信息进行处理后经过天线1701发送出去。
上述频带处理装置可以位于基带装置1703中，以上实施例中网络侧设备执行的方法可以在基带装置1703中实现，该基带装置1703包括处理器1704和存储器1705。
基带装置1703例如可以包括至少一个基带板，该基带板上设置有多个芯片，如图17所示，其中一个芯片例如为处理器1704，与存储器1705连接，以调用存储器1705中的程序，执行以上方法实施例中所示的网络设备操作。
该基带装置1703还可以包括网络接口1706，用于与射频装置1702交互信息，该接口例如为通用公共无线接口(common public radio interface，简称CPRI)。
具体地，本申请实施例的网络侧设备还包括：存储在存储器1705上并可在处理器1704上运行的指令或程序，处理器1704调用存储器1705中的指令或程序执行图13所示各模块执行的方法，并达到相同的技术效果，为避免重复，故不在此赘述。
其中，处理器1704用于：
生成映射在延迟多普勒域的同步信号序列；
对所述同步信号序列的时域采样点进行传输。
本申请实施例通过采用同步信号序列作为同步信号在延迟多普勒域进行传输，保持同步信号良好的自相关及互相关性能，简化了接收侧的同步检测步骤，适用于简化的OTFS工程实现，避免了在时频域插入同步信号造成的额外复杂度。
可选地，处理器1704用于：
不在所述延迟多普勒域的资源格上为所述同步信号序列预留保护带；或者，在所述延迟多普勒域的资源格上为所述同步信号序列预留保护带。
可选地，处理器1704用于：
在所述同步信号序列仅用于同步定时的情况下，不在所述延迟多普勒域的资源格上为所述同步信号序列预留保护带。
可选地，处理器1704用于：
所述在延迟多普勒域对所述同步信号序列进行传输，包括：
在所述同步信号序列用于同步定时且用于获取信道质量相关信息的情况下，在所述延迟多普勒域的资源格上为所述同步信号序列预留保护带。
可选地，处理器1704用于：
在所述同步信号序列用于同步定时且用于获取信道质量相关信息，且所述同步信号序列所在的导频帧中包括数据信号的情况下，在所述同步信号序列所映射的资源格和所述数据信号所映射的资源格之间预留保护带。
可选地，处理器1704用于：
基于信道质量相关信息，确定所述同步信号序列映射到延迟多普勒域的资源格模式。
可选地，处理器1704用于：
基于最近获取的一个信道质量相关信息，确定所述同步信号序列映射到延迟多普勒域的资源格模式；或
基于获取的至少两个信道质量相关信息中最大的信道质量相关信息，确定所述同步信号序列映射到延迟多普勒域的资源格模式；或
基于获取的至少两个信道质量相关信息的平均值，确定所述同步信号序列映射到延迟多普勒域的资源格模式。
可选地，处理器1704用于：
将所述同步信号序列映射到延迟多普勒域的资源格上的任意一个delay tap对应的行上。
可选地，处理器1704用于：
基于一个PN序列，生成与物理层标识相关联的同步信号序列。
可选地，处理器1704用于：
基于至少两个PN序列，生成与物理层标识相关联的同步信号序列。
可选地，所述至少两个PN序列中的每一个PN序列生成的部分同步信号序列，分别与所述物理层标识中的部分所述物理层标识相关联。
可选地，处理器1704用于：
所述至少两个PN序列交织放置，其中，所述至少一个PN序列的交织方式与所述通信对端的物理层标识或部分所述物理层标识相关联；或
所述至少两个PN序列首尾相连放置。
可选地，所述至少两个PN序列中的每一个PN序列生成的部分同步信号，与所述物理层标识相关联。
可选地，处理器1704用于：
所述至少两个PN序列交织放置，其中，所述至少一个PN序列的交织方式与所述物理层标识或部分所述物理层标识相关联；或
从预先设置的一行资源格开始，所述至少两个PN序列依次映射在所述一行资源格之后的至少两行资源格上，且所述至少两行资源格中的每一行资源格映射所述至少两个PN序列中的一个PN序列，其中，所述预先设置的一行资源格的位置与所述通信对端的相关联。
可选地，所述同步信号分为第一部分和第二部分；
所述第一部分用于作为同步信号进行同步定时；
所述第二部分用于指示物理层标识。
本申请实施例通过采用同步信号序列作为同步信号在延迟多普勒域进行传输，保持同步信号良好的自相关及互相关性能，简化了接收侧的同步检测步骤，适用于简化的OTFS工程实现，避免了在时频域插入同步信号造成的额外复杂度。
本申请实施例中的网络侧设备实施例是与上述方法实施例对应的产品实施例，上述方法实施例中的所有实现方式均适用于该终端实施例，亦可达到相同或相似的技术效果，故在此不再赘述。
本申请实施例还提供一种可读存储介质，所述可读存储介质上存储有程序或指令，该程序或指令被处理器执行时实现上述同步信号传输方法实施例的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。
其中，所述处理器为上述实施例中所述的终端中的处理器。所述可读存储介质，包括计算机可读存储介质，如计算机只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等。
本申请实施例另提供了一种芯片，所述芯片包括处理器和通信接口，所述通信接口和所述处理器耦合，所述处理器用于运行网络侧设备程序或指令，实现上述同步信号传输方法实施例的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。
应理解，本申请实施例提到的芯片还可以称为系统级芯片，系统芯片，芯片系统或片上系统芯片等。
需要说明的是，在本文中，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者装置不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者装置所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括该要素的过程、方法、物品或者装置中还存在另外的要素。此外，需要指出的是，本申请实施方式中的方法和装置的范围不限按示出或讨论的顺序来执行 功能，还可包括根据所涉及的功能按基本同时的方式或按相反的顺序来执行，例如，可以按不同于所描述的次序来执行所描述的方法，并且还可以添加、省去、或组合各种步骤。另外，参照某些示例所描述的特征可在其他示例中被组合。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到上述实施例方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质(如ROM/RAM、磁碟、光盘)中，包括若干指令用以使得一台终端(可以是手机，计算机，服务器，或者网络设备等)执行本申请各个实施例所述的方法。
上面结合附图对本申请的实施例进行了描述，但是本申请并不局限于上述的具体实施方式，上述的具体实施方式仅仅是示意性的，而不是限制性的，本领域的普通技术人员在本申请的启示下，在不脱离本申请宗旨和权利要求所保护的范围情况下，还可做出很多形式，均属于本申请的保护之内。

Claims (43)

  1. 一种同步信号传输方法，包括：
    第一通信设备生成映射在延迟多普勒域的同步信号序列；
    第一通信设备对所述同步信号序列的时域采样点进行传输。
  2. 根据权利要求1所述的同步信号传输方法，其中，所述生成映射在延迟多普勒域的同步信号序列，包括：
    不在所述延迟多普勒域的资源格上为所述同步信号序列预留保护带；或者，在所述延迟多普勒域的资源格上为所述同步信号序列预留保护带。
  3. 根据权利要求2所述的同步信号传输方法，其中，所述生成映射在延迟多普勒域的同步信号序列，包括：
    在所述同步信号序列仅用于同步定时的情况下，不在所述延迟多普勒域的资源格上为所述同步信号序列预留保护带。
  4. 根据权利要求2所述的同步信号传输方法，其中，所述生成映射在延迟多普勒域的同步信号序列，包括：
    在所述同步信号序列用于同步定时且用于获取信道质量相关信息的情况下，在所述延迟多普勒域的资源格上为所述同步信号序列预留保护带。
  5. 根据权利要求2所述的同步信号传输方法，其中，所述生成映射在延迟多普勒域的同步信号序列，包括：
    在所述同步信号序列用于同步定时且用于获取信道质量相关信息，且所述同步信号序列所在的导频帧中包括数据信号的情况下，在所述同步信号序列所映射的资源格和所述数据信号所映射的资源格之间预留保护带。
  6. 根据权利要求1-5任一项所述的同步信号传输方法，其中，所述生成映射在延迟多普勒域的同步信号序列，包括：
    基于信道质量相关信息，确定所述同步信号序列映射到延迟多普勒域的资源格模式。
  7. 根据权利要求6所述的同步信号传输方法，其中，所述基于所述信 道质量相关信息，确定所述同步信号序列映射到延迟多普勒域的资源格模式，包括：
    基于最近获取的一个信道质量相关信息，确定所述同步信号序列映射到延迟多普勒域的资源格模式；或
    基于获取的至少两个信道质量相关信息中最大的信道质量相关信息，确定所述同步信号序列映射到延迟多普勒域的资源格模式；或
    基于获取的至少两个信道质量相关信息的平均值，确定所述同步信号序列映射到延迟多普勒域的资源格模式。
  8. 根据权利要求1-5任一项所述的同步信号传输方法，其中，所述生成映射在延迟多普勒域的同步信号序列，包括：
    将所述同步信号序列映射到延迟多普勒域的资源格上的任意一个延迟多普勒资源格的延迟维度坐标delay tap对应的行上。
  9. 根据权利要求1-5任一项所述的同步信号传输方法，其中，所述生成映射在延迟多普勒域的同步信号序列，包括：
    基于一个PN序列，生成与物理层标识相关联的同步信号序列。
  10. 根据权利要求1-5任一项所述的同步信号传输方法，其中，所述生成映射在延迟多普勒域的同步信号序列，包括：
    基于至少两个PN序列，生成与物理层标识相关联的同步信号序列。
  11. 根据权利要求10所述的同步信号传输方法，其中，所述至少两个PN序列中的每一个PN序列生成的部分同步信号序列，分别与所述物理层标识中的部分所述物理层标识相关联。
  12. 根据权利要求11所述的同步信号传输方法，其中，所述基于至少两个PN序列，生成与物理层标识相关联的同步信号序列，包括：
    所述至少两个PN序列交织放置，其中，所述至少一个PN序列的交织方式与所述通信对端的物理层标识或部分所述物理层标识相关联；或
    所述至少两个PN序列首尾相连放置。
  13. 根据权利要求10所述的同步信号传输方法，其中，所述至少两个 PN序列中的每一个PN序列生成的部分同步信号，与所述物理层标识相关联。
  14. 根据权利要求13所述的同步信号传输方法，其中，所述基于至少两个PN序列，生成与物理层标识相关联的同步信号序列，包括：
    所述至少两个PN序列交织放置，其中，所述至少一个PN序列的交织方式与所述物理层标识或部分所述物理层标识相关联；或
    从预先设置的一行资源格开始，所述至少两个PN序列依次映射在所述一行资源格之后的至少两行资源格上，且所述至少两行资源格中的每一行资源格映射所述至少两个PN序列中的一个PN序列，其中，所述预先设置的一行资源格的位置与所述通信对端的相关联。
  15. 根据权利要求10至13任一项所述的同步信号传输方法，其中，所述同步信号分为第一部分和第二部分；
    所述第一部分用于作为同步信号进行同步定时；
    所述第二部分用于指示物理层标识。
  16. 一种同步信号传输方法，其中，包括：
    第二通信设备接收同步信号序列的时域采样点；
    第二通信设备对所述同步信号序列的时域采样点进行同步定时检测。
  17. 根据权利要求16所述的同步信号传输方法，其中，所述对所述同步信号序列的时域采样点进行同步定时检测，包括：
    在所述第二通信设备具有导频映射相关信息的情况下，基于所述导频映射相关信息对所述同步信号序列进行采样获得所述时域采样点；
    对所述时域采样点进行同步定时检测。
  18. 根据权利要求16所述的同步信号传输方法，其中，所述对所述同步信号序列的时域采样点进行同步定时检测，包括：
    在所述第二通信设备不具有导频映射相关信息的情况下，对所述同步信号序列的所有时域采样点进行同步定时检测。
  19. 根据权利要求16-18任一项所述的同步信号传输方法，其中，所 述方法还包括：
    在所述同步信号序列用于同步定时且用于获取信道质量相关信息的情况下，基于所述同步信号序列，确定信道质量相关信息。
  20. 根据权利要求19所述的同步信号传输方法，其中，所述方法还包括：
    在所述同步信号序列所在的导频帧中包括数据信号的情况下，基于所述信道质量相关信息，解调所述数据信号。
  21. 一种同步信号传输装置，其中，包括：
    第一生成模块，用于生成映射在延迟多普勒域的同步信号序列；
    第一传输模块，用于对所述同步信号序列的时域采样点进行传输。
  22. 根据权利要求21所述的同步信号传输装置，其中，所述第一生成模块用于：
    不在所述延迟多普勒域的资源格上为所述同步信号序列预留保护带；或者，在所述延迟多普勒域的资源格上为所述同步信号序列预留保护带。
  23. 根据权利要求22所述的同步信号传输装置，其中，所述第一生成模块用于：
    在所述同步信号序列仅用于同步定时的情况下，不在所述延迟多普勒域的资源格上为所述同步信号序列预留保护带。
  24. 根据权利要求22所述的同步信号传输装置，其中，所述第一生成模块用于：
    在所述同步信号序列用于同步定时且用于获取信道质量相关信息的情况下，在所述延迟多普勒域的资源格上为所述同步信号序列预留保护带。
  25. 根据权利要求22所述的同步信号传输装置，其中，所述第一生成模块用于：
    在所述同步信号序列用于同步定时且用于获取信道质量相关信息，且所述同步信号序列所在的导频帧中包括数据信号的情况下，在所述同步信号序列所映射的资源格和所述数据信号所映射的资源格之间预留保护带。
  26. 根据权利要求21-25任一项所述的同步信号传输装置，其中，所述第一生成模块用于：
    基于信道质量相关信息，确定所述同步信号序列映射到延迟多普勒域的资源格模式。
  27. 根据权利要求26所述的同步信号传输装置，其中，所述第一生成模块用于：
    基于最近获取的一个信道质量相关信息，确定所述同步信号序列映射到延迟多普勒域的资源格模式；或
    基于获取的至少两个信道质量相关信息中最大的信道质量相关信息，确定所述同步信号序列映射到延迟多普勒域的资源格模式；或
    基于获取的至少两个信道质量相关信息的平均值，确定所述同步信号序列映射到延迟多普勒域的资源格模式。
  28. 根据权利要求21-25任一项所述的同步信号传输装置，其中，所述第一生成模块用于：
    将所述同步信号序列映射到延迟多普勒域的资源格上的任意一个delay tap对应的行上。
  29. 根据权利要求21-25任一项所述的同步信号传输装置，其中，所述第一生成模块用于：
    基于一个PN序列，生成与物理层标识相关联的同步信号序列。
  30. 根据权利要求21-25任一项所述的同步信号传输装置，其中，所述第一生成模块用于：
    基于至少两个PN序列，生成与物理层标识相关联的同步信号序列。
  31. 根据权利要求30所述的同步信号传输装置，其中，所述至少两个PN序列中的每一个PN序列生成的部分同步信号序列，分别与所述物理层标识中的部分所述物理层标识相关联。
  32. 根据权利要求31所述的同步信号传输装置，其中，所述第一生成模块用于：
    所述至少两个PN序列交织放置，其中，所述至少一个PN序列的交织方式与所述通信对端的物理层标识或部分所述物理层标识相关联；或
    所述至少两个PN序列首尾相连放置。
  33. 根据权利要求30所述的同步信号传输装置，其中，所述至少两个PN序列中的每一个PN序列生成的部分同步信号，与所述物理层标识相关联。
  34. 根据权利要求33所述的同步信号传输装置，其中，所述第一生成模块用于：
    所述至少两个PN序列交织放置，其中，所述至少一个PN序列的交织方式与所述物理层标识或部分所述物理层标识相关联；或
    从预先设置的一行资源格开始，所述至少两个PN序列依次映射在所述一行资源格之后的至少两行资源格上，且所述至少两行资源格中的每一行资源格映射所述至少两个PN序列中的一个PN序列，其中，所述预先设置的一行资源格的位置与所述通信对端的相关联。
  35. 根据权利要求30至33任一项所述的同步信号传输装置，其中，所述同步信号分为第一部分和第二部分；
    所述第一部分用于作为同步信号进行同步定时；
    所述第二部分用于指示物理层标识。
  36. 一种同步信号传输装置，其中，包括：
    第一接收模块，用于接收同步信号序列的时域采样点；
    第一检测模块，用于对所述同步信号序列的时域采样点进行同步定时检测。
  37. 根据权利要求36所述的同步信号传输装置，其中，所述第一检测模块用于：
    在所述第二通信设备具有导频映射相关信息的情况下，基于所述导频映射相关信息对所述同步信号序列进行采样获得所述时域采样点；
    对所述时域采样点进行同步定时检测。
  38. 根据权利要求36所述的同步信号传输装置，其中，所述第一检测模块用于：
    在所述第二通信设备不具有导频映射相关信息的情况下，对所述同步信号序列的所有时域采样点进行同步定时检测。
  39. 根据权利要求36-38任一项所述的同步信号传输装置，其中，所述装置还包括：
    第一确定模块，用于在所述同步信号序列用于同步定时且用于获取信道质量相关信息的情况下，基于所述同步信号序列，确定信道质量相关信息。
  40. 根据权利要求39所述的同步信号传输装置，其中，所述装置还包括：
    第一解调模块，用于在所述同步信号序列所在的导频帧中包括数据信号的情况下，基于所述信道质量相关信息，解调所述数据信号。
  41. 一种通信设备，其中，包括处理器，存储器及存储在所述存储器上并可在所述处理器上运行的程序或指令，所述程序或指令被所述处理器执行时实现如权利要求1至15任一项所述的同步信号传输方法的步骤。
  42. 一种通信设备，其中，包括处理器，存储器及存储在所述存储器上并可在所述处理器上运行的程序或指令，所述程序或指令被所述处理器执行时实现如权利要求16至20任一项所述的同步信号传输方法的步骤。
  43. 一种可读存储介质，其中，所述可读存储介质上存储程序或指令，所述程序或指令被所述处理器执行时实现如权利要求1至15任一项所述的同步信号传输方法的步骤，或者实现如权利要求16至20任一项所述的同步信号传输方法的步骤。
PCT/CN2022/077886 2021-03-01 2022-02-25 同步信号传输方法、装置、设备及存储介质 Ceased WO2022183979A1 (zh)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024096510A1 (en) * 2022-10-31 2024-05-10 Samsung Electronics Co., Ltd. Method and system for downlink synchronization in wireless networks
WO2024169891A1 (zh) * 2023-02-17 2024-08-22 维沃移动通信有限公司 信号处理方法、装置及通信设备

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117792971A (zh) * 2022-09-21 2024-03-29 维沃移动通信有限公司 信号发送方法、信号接收方法及设备
CN120814211A (zh) * 2023-07-25 2025-10-17 北京小米移动软件有限公司 通信方法、装置、设备、存储介质及系统

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130343441A1 (en) * 2012-06-21 2013-12-26 Robert A. Alfieri Deterministic synchronization for transmitting signals between different clock domains
CN107819709A (zh) * 2017-10-26 2018-03-20 成都信息工程大学 一种移动目标检测的方法及装置
CN111095883A (zh) * 2017-09-15 2020-05-01 凝聚技术公司 在正交时频空间信号接收器中实现同步

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10063295B2 (en) * 2016-04-01 2018-08-28 Cohere Technologies, Inc. Tomlinson-Harashima precoding in an OTFS communication system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130343441A1 (en) * 2012-06-21 2013-12-26 Robert A. Alfieri Deterministic synchronization for transmitting signals between different clock domains
CN111095883A (zh) * 2017-09-15 2020-05-01 凝聚技术公司 在正交时频空间信号接收器中实现同步
CN107819709A (zh) * 2017-10-26 2018-03-20 成都信息工程大学 一种移动目标检测的方法及装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ALOK KUMAR SINHA; SAIF KHAN MOHAMMED; P. RAVITEJA; YI HONG; EMANUELE VITERBO: "OTFS Based Random Access Preamble Transmission For High Mobility Scenarios", ARXIV.ORG, CORNELL UNIVERSITY LIBRARY, 201 OLIN LIBRARY CORNELL UNIVERSITY ITHACA, NY 14853, 24 October 2020 (2020-10-24), 201 Olin Library Cornell University Ithaca, NY 14853 , XP081799453 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024096510A1 (en) * 2022-10-31 2024-05-10 Samsung Electronics Co., Ltd. Method and system for downlink synchronization in wireless networks
WO2024169891A1 (zh) * 2023-02-17 2024-08-22 维沃移动通信有限公司 信号处理方法、装置及通信设备

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