WO2022199664A1 - 信息发送方法和设备 - Google Patents
信息发送方法和设备 Download PDFInfo
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- WO2022199664A1 WO2022199664A1 PCT/CN2022/082826 CN2022082826W WO2022199664A1 WO 2022199664 A1 WO2022199664 A1 WO 2022199664A1 CN 2022082826 W CN2022082826 W CN 2022082826W WO 2022199664 A1 WO2022199664 A1 WO 2022199664A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Definitions
- the present application belongs to the field of communication technologies, and specifically relates to a method and device for sending information.
- Massive Multiple Input Multiple Output is the main technology used in next-generation communication networks. By using a large number of antennas, significant gains in energy and capacity efficiency can be achieved.
- the transmitter can use Orthogonal Time Frequency (OTFS) modulation technology to improve the success rate of receiver data decoding when sending information; or, it can also use precoding technology to reduce receiver complexity. Spend.
- OTFS Orthogonal Time Frequency
- the embodiments of the present application provide an information sending method and device, which can solve the problem that the information sending method in the related art cannot meet the application requirements of different scenarios.
- an information sending method comprising: a sending end maps QAM symbols of multiple antenna ports to a resource grid in a delayed Doppler domain; performing Heisenberg transform on the mapped QAM symbols to obtain a time domain sampling points; perform precoding on the time domain sampling points; wherein, there is a correspondence between the mapping mode of the QAM symbols mapped to the delayed Doppler domain resource grid and the coding mode of the precoding;
- the multiple antenna ports transmit the precoded time domain sampling points.
- an apparatus for sending information including: a mapping processing module for mapping QAM symbols of multiple antenna ports to a delay-Doppler domain resource grid; a transformation processing module for mapping the mapped QAM symbols The time-domain sampling points are obtained by performing Heisenberg transform on the QAM symbols; a precoding module is used to precode the time-domain sampling points; wherein the QAM symbols are mapped to the delay-Doppler-domain resource grid in a mapping manner There is a corresponding relationship with the coding mode of the precoding; the sending module is configured to send the precoded time domain sampling points through the multiple antenna ports.
- a terminal in a third aspect, includes a processor, a memory, and a program or instruction stored on the memory and executable on the processor, when the program or instruction is executed by the processor A method as described in the first aspect is implemented.
- a terminal including a processor and a communication interface, wherein the processor is configured to map QAM symbols of multiple antenna ports to a delay-Doppler domain resource grid; the mapped QAM symbols are Perform Heisenberg transform to obtain time-domain sampling points; perform precoding on the time-domain sampling points; wherein, the mapping method of the QAM symbols to the delayed Doppler domain resource grid and the encoding method of the precoding There is a corresponding relationship between them, and the communication interface is configured to send the precoded time-domain sampling points through the multiple antenna ports.
- a network-side device in a fifth aspect, includes a processor, a memory, and a program or instruction stored on the memory and executable on the processor, the program or instruction being executed by the The method as described in the first aspect is implemented when the processor executes.
- the transmitter combines OTFS modulation technology with precoding technology, which is beneficial to improve diversity gain through OTFS modulation technology; at the same time, it is beneficial to eliminate or reduce inter-symbol crosstalk through precoding technology, thereby reducing receiver complexity and improving receiver performance.
- FIG. 1 is a schematic diagram of a wireless communication system according to an embodiment of the present application.
- FIG. 3 is a schematic diagram of a specific application of the information sending method according to an embodiment of the present application.
- FIG. 5 is a schematic diagram of a specific application of the information sending method according to an embodiment of the present application.
- FIG. 7 is a schematic structural diagram of an information sending apparatus according to an embodiment of the present application.
- FIG. 8 is a schematic structural diagram of a communication device according to an embodiment of the present application.
- FIG. 9 is a schematic structural diagram of a terminal according to 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 terms 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 that "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.
- 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 following description, these techniques can also be applied to applications other than NR system applications, such as the 6th Generation (6th Generation , 6G) Communication system.
- 6th Generation 6th Generation
- FIG. 1 shows a schematic diagram of a wireless communication system to which an embodiment 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 called a terminal device or a user terminal (User Equipment, UE), and the terminal 11 may be a mobile phone, a tablet computer (Tablet Computer), a laptop computer (Laptop Computer) or a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), PDA, netbook, ultra-mobile personal computer (ultra-mobile personal computer, UMPC), mobile Internet Device (Mobile Internet Device, MID), wearable device (Wearable Device) or vehicle-mounted device ( VUE), pedestrian terminal (PUE) and other terminal-side devices, and wearable devices include: smart watches, bracelets, headphones, glasses, etc.
- PDA Personal Digital Assistant
- an embodiment of the present application provides a method 200 for sending information.
- the method can be executed by a sending end.
- the method can be executed by software or hardware installed on the sending end.
- the method includes the following steps.
- the transmitting end maps the quadrature amplitude modulation (Quadrature Amplitude Modulation, QAM) symbols of the multiple antenna ports to the delay Doppler domain resource grid.
- QAM Quadrature Amplitude Modulation
- the sending end in each embodiment of the present application may be a network side device, and may also be a terminal or the like.
- the used mapping methods may include: 1) non-orthogonal mapping; 2) orthogonal mapping.
- the orthogonality refers to occupying different resource elements (REs, resource elements) on the delayed Doppler resource grid.
- QAM symbols of multiple antenna ports are non-orthogonally mapped to M ⁇ N delay-Doppler domain resource grids; in another example, QAM symbols of multiple antenna ports are orthogonally mapped to size M ⁇ N Delay Doppler Domain Resource Grid.
- the mapped QAM symbols can undergo a two-dimensional inverse symplectic Fourier transform to be converted into the transformed symbols of the time-frequency domain plane in the traditional multi-carrier system; and then the transformed symbols of the time-frequency domain plane can be transformed into One-dimensional inverse fast Fourier transform and serial-to-parallel conversion, transformed into time-domain sample points.
- S204 can be implemented by a related technique of Orthogonal Time Frequency (OTFS) modulation.
- OTFS Orthogonal Time Frequency
- the coding manner of precoding in this step may include: 1) using a first precoding matrix for precoding, where the first precoding matrix is determined according to channel state information (Channel State Information, CSI), for example, the first precoding
- the matrix is a zero-forcing precoding matrix determined according to CSI, or an optimal precoding matrix selected from a known codebook determined according to CSI; 2) Precoding is performed using a unit precoding matrix or a random precoding matrix.
- S208 Send the precoded time domain sampling points through the multiple antenna ports.
- the transmitter combines OTFS modulation technology with precoding technology, which is beneficial to improve diversity gain through OTFS modulation technology; at the same time, it is beneficial to eliminate or reduce inter-symbol crosstalk through precoding technology, thereby reducing receiver complexity and improving reception. machine performance.
- mapping method used is non-orthogonal mapping, and in S206, ZF-precoding and the like may be used.
- the mapping method used is orthogonal mapping, and in S206, a unit precoding matrix or a random precoding matrix can be used for precoding.
- the QAM symbols of different antenna ports can use orthogonal mapping in the delayed Doppler domain to avoid overlapping of received symbols. Since the channels corresponding to different transmitting and receiving antenna ports are different, guard bands can also be reserved between their data to avoid overlapping after experiencing different delayed Doppler domain channel responses. The method for determining the width of the guard bands will be introduced later.
- the QAM symbols and pilots of different antenna ports are multiplexed in different sub-regions, and the QAM symbols of different antenna ports use the same precoding matrix.
- the sub-regions to which the pilots are mapped are different from the sub-regions to which the QAM symbols of the different antenna ports are mapped, the sub-regions to which the QAM symbols of the different antenna ports are mapped do not contain pilots, The pilots in the subregions to which the pilots are mapped are not precoded.
- the sender notifies the receiver of the precoding matrix used by the receiver through a broadcast message.
- the broadcast message includes, for example, System Information Blocks (SIB).
- SIB System Information Blocks
- the sender notifies the receiver of the precoding matrix used by the receiver through a radio resource control (Radio Resource Control, RRC) message and a downlink control information (Downlink Control Information, DCI) message.
- RRC Radio Resource Control
- DCI Downlink Control Information
- the transmitting end notifies the receiving end of the precoding matrix used by the receiving end from a set of precoding matrices through an RRC message or a DCI message; wherein the transmitting end is further configured to notify the receiving end of the set of precoding matrices through a broadcast message.
- the broadcast message includes, for example, the SIB.
- a guard interval is reserved for the QAM symbols of different antenna ports when they are mapped to the delay Doppler domain resource grid.
- the size of the above guard interval satisfies the following formula:
- l ⁇ is the size of the guard interval in the time-delay domain direction of the delay-Doppler-domain resource cell
- k v is the size of the guard interval in the Doppler-frequency shift domain direction of the delay-Doppler-domain resource cell
- M is the size of the delay domain of the delayed Doppler domain resource grid
- N is the size of the Doppler frequency shift domain of the delayed Doppler domain resource grid
- ⁇ f is the subcarrier spacing after ISFFT transform to the time-frequency domain
- ⁇ T is the time length after ISFFT transformed to time-frequency domain.
- FIG. 3 schematically shows the QAM symbols of two antenna ports, and the QAM symbols of the two antenna ports are represented by slash-filled squares and backslash-filled squares, respectively.
- the number of antenna ports can be more, and is not limited to the two shown in the figure.
- the QAM symbols of different antenna ports can be mapped to all the delay-Doppler-domain resource grids.
- the resource element Resource Element, RE
- RE resource Element
- mapping When mapping is adopted in this way, the precoding matrix required in S206 can be calculated according to the CSI. Taking zero-forcing precoding as an example, Then the sending side needs to obtain the channel vector, where, is the N ⁇ H channel vector between the transmitting antenna and the receiving antenna k, is the ideal precoding matrix. Therefore, this method needs to perform channel estimation in advance, and the transmitter can also send pilots, receive CSI, and so on.
- the transmit samples of each antenna port experience different channels during the same frame time, the delay and Doppler shift of different received signals relative to the transmitted signal are all the same.
- the QAM symbols of different antenna ports are mapped in the delay Doppler domain with a guard interval reserved, the delay and Doppler dimension shift of each received signal observed on the delay Doppler map are still limited to within the corresponding protective band. Therefore, orthogonality can be maintained between symbols of each receive antenna port.
- qi is the transmit power of the ith antenna
- s i is the modulation symbol of the original transmitted data
- K receiving antennas have received K copies of the transmitted data in the delayed Doppler domain.
- K receiving antennas belong to the same receiver, or K receiving antennas belong to different receivers but can When cooperating with each other, combined demodulation can also be performed to improve receiver performance.
- l ⁇ is the size of the guard interval in the time-delay domain direction of the delay-Doppler-domain resource cell
- k v is the size of the guard interval in the Doppler-frequency shift domain direction of the delay-Doppler-domain resource cell
- M is the size of the delay domain of the delayed Doppler domain resource grid
- N is the size of the Doppler frequency shift domain of the delayed Doppler domain resource grid
- ⁇ f is the subcarrier spacing after ISFFT transform to the time-frequency domain
- ⁇ T is the time length after ISFFT transformed to time-frequency domain.
- This embodiment may also use a pilot frequency, and reference may be made to the embodiments shown in FIG. 5 and FIG. 6 for the location of the pilot frequency.
- a precoding matrix is pre-defined:
- the transmitting end notifies the receiving end of the precoding matrix used by the receiving end from a set of precoding matrices through an RRC message or a DCI message; wherein the transmitting end is further configured to notify the receiving end of the set of precoding matrices through a broadcast message.
- the receiving end obtains the position of the pilot through blind sequence detection, where the pilot is a pilot sequence.
- the sub-regions to which the QAM symbols of different antenna ports are mapped do not contain pilots, and the pilots in the sub-regions to which the pilots are mapped are not precoded.
- the position of the pilot frequency satisfies at least one of the following 1) to 3): 1) predefined; 2) the device notifies the receiving end of the position of the pilot frequency through a broadcast message position; 3) the receiving end obtains the position of the pilot frequency through blind sequence detection, wherein the pilot frequency is a pilot frequency sequence.
- the processor may be 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 configured to run a program or an instruction to implement the above information sending method embodiments.
- the chip includes a processor and a communication interface
- the communication interface is coupled to the processor
- the processor is configured to run a program or an instruction to implement the above information sending method embodiments.
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Abstract
Description
Claims (27)
- 一种信息发送方法,包括:发送端将多个天线端口的正交振幅调制QAM符号映射到延迟多普勒域资源格;将映射后的所述QAM符号进行海森堡Heisenberg变换得到时域采样点;对所述时域采样点进行预编码;其中,所述QAM符号映射到所述延迟多普勒域资源格的映射方式与所述预编码的编码方式之间存在对应关系;通过所述多个天线端口发送预编码后的所述时域采样点。
- 根据权利要求1所述的方法,其中,所述QAM符号映射到所述延迟多普勒域资源格的映射方式为非正交映射,所述方法还包括:获取信道状态信息CSI;根据所述CSI确定所述预编码使用的预编码矩阵。
- 根据权利要求1所述的方法,其中,所述QAM符号映射到所述延迟多普勒域资源格的映射方式为正交映射;所述预编码使用的预编码矩阵包括:单位预编码矩阵;或从预定义的一组预编码矩阵中挑选出的预编码矩阵。
- 根据权利要求3所述的方法,其中,所述延迟多普勒域资源格被划分为至少一个子区域,同一个天线端口的所述QAM符号和导频复用在相同的所述子区域中。
- 根据权利要求3所述的方法,其中,不同天线端口的所述QAM符号和导频复用在不同的所述子区域中,不同天线端口的所述QAM符号使用相同预编码矩阵。
- 根据权利要求3所述的方法,其中,同一个天线端口的所述QAM符号和导频使用相同的预编码矩阵。
- 根据权利要求3所述的方法,其中,所述延迟多普勒域资源格被划分为至少一个子区域,所述导频所映射的子区域与所述不同天线端口的QAM符号映射的子区域均不同。
- 根据权利要求7所述的方法,其中,不同天线端口的所述QAM符号所映射的子区域中不含有导频,所述导频所映射的子区域中的所述导频不进行预编码。
- 根据权利要求8所述的方法,其中,不同天线端口的所述QAM符号使用的预编码矩阵不同。
- 根据权利要求9所述的方法,其中,所述预编码矩阵满足如下至少之一:预定义的;所述发送端通过广播消息通知接收端使用的预编码矩阵;所述发送端通过无线资源控制RRC消息和下行控制信息DCI消息通知接收端使用的预编码矩阵;所述发送端通过RRC消息或DCI消息从一组预编码矩阵中通知接收端使用的预编码矩阵;其中,所述发送端还用于通过广播消息通知接收端所述一组预编码矩阵。
- 根据权利要求8所述的方法,其中,所述导频的位置满足如下至少之一:预定义的;所述发送端通过广播消息通知接收端所述导频的位置;接收端通过序列盲检得到所述导频的位置,其中,所述导频为导频序列。
- 根据权利要求3至11任一项所述的方法,其中,不同天线端口的所述QAM符号在映射到所述延迟多普勒域资源格时预留有保护间隔。
- 一种信息发送装置,包括:映射处理模块,用于将多个天线端口的QAM符号映射到延迟多普勒域资源格;变换处理模块,用于将映射后的所述QAM符号进行海森堡变换得到时域采样点;预编码模块,用于对所述时域采样点进行预编码;其中,所述QAM符号映射到所述延迟多普勒域资源格的映射方式与所述预编码的编码方式之间存在对应关系;发送模块,用于通过所述多个天线端口发送预编码后的所述时域采样点。
- 根据权利要求13所述的装置,其中,所述QAM符号映射到所述延迟多普勒域资源格的映射方式为非正交映射,所述装置还包括:获取模块,用于获取CSI;确定模块,用于根据所述CSI确定所述预编码使用的预编码矩阵。
- 根据权利要求13所述的装置,其中,所述QAM符号映射到所述延迟多普勒域资源格的映射方式为正交映射;所述预编码使用的预编码矩阵包括:单位预编码矩阵;或从预定义的一组预编码矩阵中挑选出的预编码矩阵。
- 根据权利要求15所述的装置,其中,所述延迟多普勒域资源格被划分为至少一个子区域,同一个天线端口的所述QAM符号和导频复用在相同的所述子区域中。
- 根据权利要求15所述的装置,其中,不同天线端口的所述QAM符号和导频复用在不同的所述子区域中,不同天线端口的所述QAM符号使用相同预编码矩阵。
- 根据权利要求15所述的装置,其中,同一个天线端口的所述QAM符号和导频使用相同的预编码矩阵。
- 根据权利要求15所述的装置,其中,所述延迟多普勒域资源格被划分为至少一个子区域,所述导频所映射的子区域与所述不同天线端口的QAM符号映射的子区域均不同。
- 根据权利要求19所述的装置,其中,不同天线端口的所述QAM符号所映射的子区域中不含有导频,所述导频所映射的子区域中的所述导频不进行预编码。
- 根据权利要求20所述的装置,其中,不同天线端口的所述QAM符号使用的预编码矩阵不同。
- 根据权利要求21所述的装置,其中,所述预编码矩阵满足如下至少之一:预定义的;所述装置通过广播消息通知接收端使用的预编码矩阵;所述装置通过RRC消息和DCI消息通知接收端使用的预编码矩阵;所述装置通过RRC消息或DCI消息从一组预编码矩阵中通知接收端使用的预编码矩阵;其中,所述装置还用于通过广播消息通知接收端所述一组预编码矩阵。
- 根据权利要求20所述的装置,其中,所述导频的位置满足如下至少之一:预定义的;所述装置通过广播消息通知接收端所述导频的位置;接收端通过序列盲检得到所述导频的位置,其中,所述导频为导频序列。
- 根据权利要求15至23任一项所述的装置,其中,不同天线端口的所述QAM符号在映射到所述延迟多普勒域资源格时预留有保护间隔。
- 一种终端,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12任一项所述的信息发送方法。
- 一种网络侧设备,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权利要求1至12任一项所述的信息发送方法。
- 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权利要求1至12任一项所述的信息发送方法。
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| CN115714704A (zh) * | 2022-11-08 | 2023-02-24 | 中国科学院计算技术研究所 | 一种基于变换域的信号调制、传输方法以及通信系统 |
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| CN116938301A (zh) * | 2022-04-11 | 2023-10-24 | 维沃移动通信有限公司 | 信息传输方法、装置、终端及网络侧设备 |
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| CN115133965A (zh) | 2022-09-30 |
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