WO2022007932A1 - Procédé d'émission de signaux, procédé d'estimation de canaux, dispositif d'extrémité d'émission et dispositif d'extrémité de réception - Google Patents

Procédé d'émission de signaux, procédé d'estimation de canaux, dispositif d'extrémité d'émission et dispositif d'extrémité de réception Download PDF

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Publication number
WO2022007932A1
WO2022007932A1 PCT/CN2021/105409 CN2021105409W WO2022007932A1 WO 2022007932 A1 WO2022007932 A1 WO 2022007932A1 CN 2021105409 W CN2021105409 W CN 2021105409W WO 2022007932 A1 WO2022007932 A1 WO 2022007932A1
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WIPO (PCT)
Prior art keywords
antenna port
pilot
ofdm symbol
end device
signal
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PCT/CN2021/105409
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English (en)
Chinese (zh)
Inventor
李建军
宋扬
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维沃移动通信有限公司
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Publication of WO2022007932A1 publication Critical patent/WO2022007932A1/fr

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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0204—Channel estimation of multiple channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals

Definitions

  • CS-based channel estimation and feedback scheme relies on the prior assumption of perfect sparseness of the CSI matrix, and performs poorly on massive MIMO channels that only satisfy the approximate sparse condition, and the performance is difficult to meet the requirements of practical systems.
  • the estimated time-delay domain channel is processed to obtain the channel on each sub-carrier in the frequency domain from each transmit antenna port to the receive antenna port.
  • an embodiment of the present application provides a signal transmission method, which is applied to a transmitting end device, where the transmitting end device has N transmitting antenna ports, where N is an integer greater than 1, and the method includes:
  • the pilot random sequence of each transmit antenna port is mapped to at least one OFDM symbol according to a preset rule, and a pilot signal corresponding to each transmit antenna port on the at least one OFDM symbol is generated; ports have different pilot random sequences;
  • the pilot signal is transformed into a time-domain transmission signal of the at least one OFDM symbol, and sent through a corresponding transmission antenna port.
  • an embodiment of the present application provides a channel estimation device, which is applied to a receiving end device, where the receiving end device has M receiving antenna ports, where M is an integer greater than or equal to 1, and the device includes:
  • an acquisition module used for acquiring the pilot symbols sent by the transmitting end device through the transmitting antenna port through the receiving antenna port;
  • a first processing module configured to process the pilot symbols to estimate the time delay domain channel from each transmit antenna port to the receive antenna port
  • the second processing module is configured to process the estimated time delay domain channel to obtain the channel from each transmit antenna port to the receive antenna port on each subcarrier in the frequency domain.
  • an embodiment of the present application provides a signal sending apparatus, which is applied to a sending end device, where the sending end device has N sending antenna ports, where N is an integer greater than 1, and the apparatus includes:
  • a generating module for mapping the random pilot sequence of each transmitting antenna port to at least one OFDM symbol according to a preset rule, and generating a pilot signal corresponding to each transmitting antenna port on the at least one OFDM symbol; Wherein, different transmit antenna ports have different pilot random sequences;
  • a sending module configured to convert the pilot signal into a time-domain sending signal of the at least one OFDM symbol, and send the signal through a corresponding sending antenna port.
  • an embodiment of the present application provides a receiving end device, the terminal includes a processor, a memory, and a program or instruction stored on the memory and executable on the processor, the program or instruction being The processor implements the steps of the method according to the first aspect when executed.
  • an embodiment of the present application provides a sending end device, the sending end device includes a processor, a memory, and a program or instruction stored on the memory and executable on the processor, the program or The instructions, when executed by the processor, implement the steps of the method of the second aspect.
  • an embodiment of the present application provides 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, the steps of the method according to the first aspect are implemented , or implement the steps of the method described in the second aspect.
  • each transmitting antenna port of the transmitting end transmits pilot symbols at their corresponding pilot positions, and different transmitting antenna ports use different pilot random sequences; at the receiving end, after receiving the pilot signal , instead of estimating the channel in the frequency domain but in the time-delay domain, combining the sparseness of the channel space angle domain and the sparseness of the time-delay domain to convert the frequency-selective channel in the frequency domain to the time-delay domain.
  • the multi-path channel with limited number of paths is estimated, and the final channel estimation of all antennas in massive MIMO on all sub-carriers is completed at one time, thereby improving the accuracy of channel estimation and greatly reducing pilot overhead.
  • FIG. 1 shows a block diagram of a wireless communication system to which an embodiment of the present application can be applied
  • FIG. 2 shows a flowchart of steps of a signal sending method provided by an embodiment of the present application
  • FIG. 3 shows a flowchart of steps of a channel estimation method provided by an embodiment of the present application
  • FIG. 4 is a schematic diagram of an application system of the signal transmission method and the channel estimation method provided by the embodiment of the present application;
  • FIG. 5 shows a schematic diagram of the performance of channel estimation provided by an embodiment of the present application
  • FIG. 6 is a schematic structural diagram of a signal transmission apparatus provided by an embodiment of the present application.
  • FIG. 7 shows a schematic structural diagram of a channel estimation apparatus provided by an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of a network side device provided by an embodiment of the present application.
  • FIG. 10 shows a schematic structural diagram of a terminal 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 distinguish between “first”, “second”, etc.
  • the objects are usually of one type, and the number of objects is not limited.
  • the first object may be one or more than one.
  • “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-Advanced
  • 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, although these techniques are also applicable to applications other than NR system applications, such as 6th generation ( 6 th Generation, 6G) communication system.
  • 6th generation 6 th Generation, 6G
  • the network side device 12 may be a base station or a core network, wherein 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 transceiver, a basic service Set (Basic Service Set, BSS), Extended Service Set (Extended Service Set, ESS), Node B, Evolved Node B (eNB), Home Node B, Home Evolved Node B, WLAN Access Point, WiFi Node, Send Transmitting Receiving Point (TRP) or some other suitable term in the field, as long as the same technical effect is achieved, the base station is not limited to specific technical terms.
  • the base station in the NR system is taken as an example, but the specific type of the base station is not limited.
  • the transmitting end device provided in the embodiment of the present application is a network side device, and the receiving end device is a terminal.
  • an embodiment of the present application provides a signal transmission method, which is applied to a transmitting end device.
  • the transmitting end device has N transmitting antenna ports, where N is an integer greater than 1.
  • the method includes:
  • Step 201 Map the random pilot sequence of each transmit antenna port to at least one OFDM symbol according to a preset rule, and generate a pilot signal corresponding to each transmit antenna port on the at least one OFDM symbol; wherein , and different transmit antenna ports have different pilot random sequences. Since different transmit antenna ports have different pilot random sequences, the device at the receiving end can identify different transmit antenna ports according to the pilot random sequences.
  • one transmit antenna port mentioned in the embodiments of the present application corresponds to one transmit antenna; or, one transmit antenna port is a port formed by multiple transmit antennas through precoding or beamforming.
  • the random pilot sequence of each transmitting antenna port is mapped to the time-frequency resource occupied by the pilot signal, and the pilot signal corresponding to each antenna port is generated.
  • the transmitting end device adopts a "comb-shaped" pilot form, that is, inserting pilots at equal intervals in each OFDM symbol subcarrier (the pilots are inserted at equal intervals, then the receiving end The device will reduce the computational difficulty during channel estimation).
  • N C one OFDM symbol sub-carriers.
  • the number of pilots in the OFDM symbol is P, and the position label of pilot insertion (ie, the number of subcarriers occupied by pilots) is 0, N g , 2N g . . . (P-1)N g , where N g is Pilot insertion interval.
  • the P sub-carriers are dedicated to transmitting pilots.
  • the time-frequency resources occupied by pilot random sequences of different transmit antenna ports are the same.
  • each transmitting antenna ports in a subcarrier number or a plurality of OFDM symbols is 0, N g, 2N g ... (P-1) transmit pilot symbols on subcarriers of N g.
  • the random pilot sequence of each transmitting antenna consists of P pilot symbols; P is the total number of pilot subcarriers in the at least one OFDM symbol.
  • the subcarriers occupied by the pilot symbols are called pilot subcarriers.
  • Each antenna port of massive MIMO at the transmitter needs to transmit pilot symbols on each pilot subcarrier.
  • the pilot symbols sent by different transmit antenna ports on different pilot subcarriers are different.
  • Different antenna ports have different pilot random sequences.
  • the pilot symbol sent by the i-th transmitting antenna on the j-th pilot resource is c i,j
  • all c i,j can be combined into a binary random matrix C . Its dimension is N ⁇ P.
  • the N elements of each column are respectively transmitted on the N transmit antenna ports.
  • C is a pilot random sequence matrix, and its dimension is N ⁇ P. That is, C is a set of N pilot random sequences of length P. C can also truncate fragments of length P for N random sequences (m sequences, gold sequences, etc.) with longer lengths.
  • P is greater than or equal to the product of N and the maximum delay; wherein, the maximum delay is the maximum delay of the multipath channel.
  • the delay effect of multipath must be considered.
  • the maximum delay mentioned in this embodiment of the present application is: the time extension of a path with the largest multipath channel delay, which is usually measured by the sampling interval at the current sampling rate.
  • each transmit antenna port of the transmitting end transmits pilot symbols at their corresponding pilot positions, and transmits them differently.
  • the antenna ports use different pilot random sequences, and the time-frequency resources occupied by the pilot random sequences of different transmit antenna ports are the same, so that the pilot overhead can be reduced on the basis of ensuring that the receiver can identify different transmit antenna ports through the pilot random sequences. .
  • an embodiment of the present application also provides a channel estimation method, which is applied to a receiving end device, where the receiving end device has M receiving antenna ports, where M is an integer greater than or equal to 1, and the method includes:
  • Step 301 obtaining the pilot symbols sent by the transmitting end device through the transmitting antenna port through the receiving antenna port;
  • Step 302 Process the pilot symbols to estimate the time delay domain channel from each transmit antenna port to the receive antenna port. At the receiving end, after receiving the pilot symbol, the embodiment of the present application does not estimate the channel in the frequency domain, but in the time delay domain.
  • Step 303 Process the estimated delay domain channel (eg, perform discrete Fourier transform DFT) to obtain the channel from each transmit antenna port to the receive antenna port on each subcarrier in the frequency domain.
  • DFT discrete Fourier transform
  • each receive antenna port at the receive end performs channel estimation independently, only one receive antenna port can be considered for the design, that is, Consider an N ⁇ 1 large-scale antenna system.
  • step 302 includes:
  • the pilot symbols are processed by using a Structured Orthogonal Matching Pursuit (SOMP) algorithm, and the delay domain channel from each transmit antenna port to the receive antenna port is estimated.
  • SOMP Structured Orthogonal Matching Pursuit
  • the embodiment of the present application is based on the SOMP algorithm, and uses the sparseness of the time delay domain and the space domain to find the path where the channel is not 0. Then, the channel gain of the path whose channel is not 0 is estimated, and finally the channel of each antenna in the massive MIMO array in the frequency domain is obtained through the two-dimensional Fourier transformation. In this way, the final channel estimation of all antennas in massive MIMO on all subcarriers is completed at one time.
  • step 301 includes:
  • a pilot symbol is extracted from the received signal in the frequency domain of the at least one OFDM symbol according to a mapping rule.
  • the time domain received signal r of an OFDM symbol is:
  • N denotes the number of transmit antenna ports
  • h i denotes the antenna port to the transmission channel or equivalent channel of said receive antenna ports
  • operator * represents convolution operation
  • n represents noise or random interference.
  • the frequency domain received signal y of an OFDM symbol is:
  • the receiving end first passes DFI to the received signal r in the time domain, and the received signal y in the frequency domain can be obtained as:
  • the transmitter device downlink transmits data and pilot at the same time.
  • the receiving end device needs to extract received pilot symbols from subcarriers occupied by pilots in the received signal y in the frequency domain.
  • the pilot symbol of the kth OFDM symbol of the at least one OFDM symbol for:
  • s is the set of pilot subcarrier positions in the one OFDM symbol;
  • P k is the number of pilot symbols in the kth OFDM symbol;
  • c i represents the random pilot sequence of the transmitting antenna port i, and
  • F LP is determined by F L It is composed of partial row vectors of F LP , and the set of row numbers of the row vectors corresponding to F LP is s.
  • the pilot random sequence is mapped to an OFDM symbol, and the pilot symbols are inserted at equal intervals on the subcarriers of the OFDM symbol, and the pilot insertion interval is N g ; then the pilot symbol y P of an OFDM symbol is composed of a vector subscript y is 0, N g, 2N g ... (P-1) N g elemental composition.
  • the received pilot y P can be expressed as:
  • the channel estimation problem has been modeled as a signal recovery problem, where y P is the low-dimensional observation vector, A is the perception matrix, and h is the high-dimensional sparse vector to be recovered.
  • the SOMP algorithm is an improved version of the OMP algorithm. For sparse signal recovery, it can be divided into two steps. The first step is to find the support set, i.e. find the positions of the non-zero elements of h. The second step is to use the ZF or MMSE algorithm to recover the channel gain values at the positions of the non-zero elements.
  • SOMP exploits the structured sparsity of sparse vectors.
  • the support set is detected by taking advantage of the fact that the delays of all transmitting antennas are the same.
  • the working process of pilot frequency transmission and channel estimation of the system to which the signal transmission method and the channel estimation method provided by the embodiments of the present application are applied is as follows:
  • the receiving end After the receiving end receives the signal, it first goes through DFT to obtain the received signal in the frequency domain. Then, after tapping, the pilot symbols and data symbols are extracted. For the pilot symbols, the SOMP algorithm is used to estimate the time-delay domain channel from each transmit antenna port to the receive antenna port. Finally, by performing DFT on the estimated delay domain channel, the final channel from each transmit antenna port to the receive antenna port on each subcarrier in the frequency domain can be obtained.
  • FIG. 5 shows the performance of the SOMP algorithm when there are only six paths in the channel delay domain with 32 transmit antenna ports. Among them, we take advantage of the feature of structured sparseness, that is, the path delay of all transmitting antenna channels in the delay domain is the same. We call this method SOMP. In the simulation, the number of OFDM carriers is 4096. The maximum channel delay is 256 samples. The number of pilots is 256. As can be seen from the figure, in the case of extremely low pilot overhead, for 32 transmit antennas, the SOMP algorithm can still accurately estimate the channel.
  • an embodiment of the present application further provides a signal sending apparatus 600, which is applied to a sending end device, where the sending end device has N sending antenna ports, where N is an integer greater than 1, and the apparatus includes:
  • the generating module 601 is configured to map the pilot random sequence of each transmitting antenna port to at least one OFDM symbol according to a preset rule, and generate the pilot corresponding to each transmitting antenna port on the at least one OFDM symbol signal; wherein, different transmit antenna ports have different pilot random sequences;
  • the sending module 602 is configured to transform the pilot signal into a time domain sending signal of the at least one OFDM symbol, and send the signal through a corresponding sending antenna port.
  • a sequence determination submodule configured to determine the preset pilot random sequences corresponding to each antenna port respectively
  • a resource determination submodule configured to determine time-frequency resources occupied by pilot signals of respective antenna ports; the time-frequency resources include: at least one OFDM symbol and multiple subcarriers in each OFDM symbol in the at least one OFDM symbol ;
  • the time-frequency resources occupied by pilot random sequences of different transmit antenna ports are the same.
  • the random pilot sequence of each transmitting antenna consists of P pilot symbols; P is the total number of pilot subcarriers in the at least one OFDM symbol.
  • P is greater than or equal to the product of N and the maximum delay; wherein, the maximum delay is the maximum delay of the multipath channel.
  • one transmit antenna port corresponds to one transmit antenna; or, one transmit antenna port is a port formed by multiple transmit antennas through precoding or beamforming.
  • each transmit antenna port of the transmitting end transmits pilot frequency at its corresponding pilot frequency position
  • Different transmitting antenna ports use different pilot random sequences, and the time-frequency resources occupied by the pilot random sequences of different transmitting antenna ports are the same, so as to ensure that the receiving end can identify different transmitting antenna ports through the pilot random sequences.
  • Reduce pilot overhead In the embodiment of the present application, in order to greatly reduce the pilot frequency and the channel estimation complexity of the OFDM-based massive MIMO system, each transmit antenna port of the transmitting end transmits pilot frequency at its corresponding pilot frequency position
  • the signal transmitting apparatus provided by the embodiment of the present application is a device capable of executing the above-mentioned signal transmitting method, and all embodiments of the above-mentioned signal transmitting method are applicable to the apparatus, and can achieve the same or similar beneficial effects.
  • the execution subject may be a channel estimation apparatus, or a control module in the channel estimation apparatus for performing loading of the channel estimation method.
  • a channel estimation method performed by a channel estimation device is used as an example to describe the channel estimation device provided by the embodiments of the present application.
  • an obtaining module 701 configured to obtain, through the receiving antenna port, the pilot symbol sent by the sending end device through the sending antenna port;
  • a first processing module 702 configured to process the pilot symbols to estimate the time delay domain channel from each transmit antenna port to the receive antenna port;
  • the second processing module 703 is configured to process the estimated time-delay domain channel to obtain the channel from each transmit antenna port to the receive antenna port on each subcarrier in the frequency domain.
  • the first processing module includes:
  • a first receiving submodule configured to receive, through the receiving antenna port, a time-domain received signal of at least one OFDM symbol sent by the transmitting end device through the transmitting antenna port;
  • the time domain received signal r of an OFDM symbol is:
  • each transmitting antenna port of the transmitting end sends a pilot symbol at its corresponding pilot position, and different transmitting antenna ports use different pilot random sequences; at the receiving end, after receiving the pilot signal, Instead of estimating the channel in the frequency domain, the channel is estimated in the time-delay domain, so as to complete the final channel estimation of all antennas on all subcarriers in massive MIMO at one time.
  • the channel estimation device provided in the embodiment of the present application is a device capable of executing the above-mentioned channel estimation method, and all embodiments of the above-mentioned channel estimation method are applicable to the device, and can achieve the same or similar beneficial effects.
  • the signal sending apparatus or the channel estimation apparatus in this embodiment of the present application may be an apparatus, or may be a component, an integrated circuit, or a chip in a terminal.
  • the apparatus may be a mobile electronic device or a non-mobile electronic device.
  • the mobile electronic device may be a mobile phone, a tablet computer, a notebook computer, a palmtop computer, an in-vehicle electronic device, a wearable device, an ultra-mobile personal computer (UMPC), a netbook, or a personal digital assistant (personal digital assistant).
  • assistant, PDA personal digital assistant
  • the non-mobile electronic device can be a server, a network attached storage (NAS), a personal computer (PC), a television (television, TV), a teller machine or a self-service machine, etc.
  • NAS network attached storage
  • PC personal computer
  • TV television
  • teller machine a teller machine
  • self-service machine etc.
  • the signal sending apparatus or the channel estimation apparatus in the embodiment of the present application may be an apparatus having 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 signal sending apparatus or the channel estimation apparatus provided in the embodiments of the present application can implement each process implemented by the method embodiments in FIG. 2 to FIG. 5 , and to avoid repetition, details are not described here.
  • the network-side device in this embodiment of the present application further includes: instructions or programs that are stored in the memory 95 and run on the processor 94, and the processor 94 invokes the instructions or programs in the memory 95 to execute the modules shown in FIG. 9 .
  • FIG. 10 is a schematic diagram of a hardware structure of a terminal (that is, when the receiving end device is a terminal) implementing an embodiment of the present application.
  • the terminal 1000 includes but is not limited to: a radio frequency unit 1001, a network module 1002, an audio output unit 1003, an input unit 1004, a sensor 1005, a display unit 1006, a user input unit 1007, an interface unit 1008, a memory 1009, a processor 1010 and other components .
  • the input unit 1004 may include a graphics processor (Graphics Processing Unit, GPU) 10041 and a microphone 10042. Such as camera) to obtain still pictures or video image data for processing.
  • the display unit 1006 may include a display panel 10061, which may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like.
  • the user input unit 1007 includes a touch panel 10071 and other input devices 10072 .
  • the touch panel 10071 is also called a touch screen.
  • the touch panel 10071 may include two parts, a touch detection device and a touch controller.
  • Other input devices 10072 may include, but are not limited to, physical keyboards, function keys (such as volume control keys, switch keys, etc.), trackballs, mice, and joysticks, which will not be repeated here.
  • the radio frequency unit 1001 receives the downlink data from the network side device, and then processes it to the processor 1010; in addition, sends the uplink data to the network side device.
  • the radio frequency unit 1001 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 radio frequency unit 1001 is configured to obtain, through the receiving antenna port, the pilot symbol sent by the transmitting end device through the transmitting antenna port;
  • the processor is the processor in the electronic device described in the foregoing embodiments.
  • 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 signal sending method or channel estimation
  • 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 signal sending method or channel estimation
  • 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-a-chip, or a system-on-a-chip, or the like.
  • modules, units, sub-modules, sub-units, etc. can be implemented in one or more Application Specific Integrated Circuits (ASIC), Digital Signal Processing (DSP), digital signal processing equipment ( DSP Device, DSPD), Programmable Logic Device (Programmable Logic Device, PLD), Field-Programmable Gate Array (Field-Programmable Gate Array, FPGA), general-purpose processor, controller, microcontroller, microprocessor, for in other electronic units or combinations thereof that perform the functions described herein.
  • ASIC Application Specific Integrated Circuits
  • DSP Digital Signal Processing
  • DSP Device digital signal processing equipment
  • PLD Programmable Logic Device
  • Field-Programmable Gate Array Field-Programmable Gate Array
  • FPGA Field-Programmable Gate Array
  • 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, an air conditioner, 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

La présente invention concerne un procédé d'émission de signaux, un procédé d'estimation de canaux, un dispositif d'extrémité d'émission et un dispositif d'extrémité de réception. Le procédé comprend : le mappage, selon une règle prédéfinie, de séquences pilotes aléatoires de ports d'antenne d'émission respectifs à au moins un symbole OFDM, et la génération de signaux pilotes correspondants des ports d'antenne d'émission respectifs sur le ou les symboles OFDM, différents ports d'antenne d'émission ayant des séquences pilotes aléatoires différentes ; et la conversion des signaux pilotes en des signaux d'émission de domaine temporel du ou des symboles OFDM, et l'émission desdits signaux pilotes au moyen des ports d'antenne d'émission correspondants.
PCT/CN2021/105409 2020-07-10 2021-07-09 Procédé d'émission de signaux, procédé d'estimation de canaux, dispositif d'extrémité d'émission et dispositif d'extrémité de réception WO2022007932A1 (fr)

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CN202010665075.7A CN113922848B (zh) 2020-07-10 2020-07-10 信号发送方法、信道估计方法、发送端设备及接收端设备
CN202010665075.7 2020-07-10

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CN115296706A (zh) * 2022-06-30 2022-11-04 华为技术有限公司 一种信号检测方法及装置
CN115361257A (zh) * 2022-07-14 2022-11-18 鹏城实验室 上行大规模mimo稀疏信道估计方法及相关设备
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