WO2022082494A1 - Procédé de communication sans fil, extrémité d'envoi, et extrémité de réception - Google Patents

Procédé de communication sans fil, extrémité d'envoi, et extrémité de réception Download PDF

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Publication number
WO2022082494A1
WO2022082494A1 PCT/CN2020/122437 CN2020122437W WO2022082494A1 WO 2022082494 A1 WO2022082494 A1 WO 2022082494A1 CN 2020122437 W CN2020122437 W CN 2020122437W WO 2022082494 A1 WO2022082494 A1 WO 2022082494A1
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transmitter
delay
transmitting end
signal power
region
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PCT/CN2020/122437
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English (en)
Chinese (zh)
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陈晋辉
徐伟杰
左志松
张治�
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Oppo广东移动通信有限公司
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Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Priority to PCT/CN2020/122437 priority Critical patent/WO2022082494A1/fr
Priority to CN202080103163.6A priority patent/CN115843428A/zh
Publication of WO2022082494A1 publication Critical patent/WO2022082494A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes

Definitions

  • the embodiments of the present application relate to the field of communications, and more particularly, to a wireless communication method, a sending end, and a receiving end.
  • Orthogonal Time Frequency Space realizes multiplexing of Quadrature Amplitude Modulation (QAM) symbols using a new class of carriers in the delay-Doppler domain.
  • the OTFS technology can be applied to a multi-user system, that is, a communication system with multiple senders and one receiver.
  • LMMSE Linear Minimum Mean Square Error
  • the LMMSE equalizer is used in the LMMSE receiver to equalize the received signal.
  • the equalization principle of the LMMSE equalizer is to equalize the mean square between the received signal and the transmitted signal by eliminating the intersymbol interference and multi-user interference caused by multipath. The error is the smallest, and this equalization method only eliminates the inter-symbol interference and multi-user interference caused by multi-path after equalization consideration, resulting in the reliability of the channel decoding result obtained by the receiver. lower.
  • the embodiments of the present application provide a wireless communication method, a sending end, and a receiving end, so that the reliability of the channel decoding result obtained by the receiving end is higher.
  • a wireless communication method including: a receiving end receives a first OTFS symbol, the first OTFS symbol is multiplexed by a plurality of transmitting ends, and the first OTFS symbol is carried on a plurality of time-delay Doppler regions respectively Modulation symbols and pilot symbols of multiple transmitters, multiple delay-Doppler regions correspond to multiple transmitters one-to-one, and multiple delay-Doppler regions do not overlap; the receiver follows the channel decoding sequence of multiple transmitters.
  • the first transmitting end to be decoded among the plurality of transmitting ends is used as the first transmitting end, and the following steps are performed: S1: the receiving end performs channel decoding on the first transmitting end according to the first OTFS symbol, and obtains a channel decoding result; S2 : the receiving end judges whether the channel decoding result passes the check, if it passes the check, execute S3, otherwise, execute step S5; S3: the receiving end judges whether there is a transmission to be decoded in the multiple sending ends except the first sending end If it exists, execute S4, otherwise, end; S4: The receiving end estimates the received signal after the first transmitting end has experienced the channel, obtains the first received signal, and removes the first received signal in the first OTFS symbol to obtain The second OTFS symbol; according to the channel decoding sequence, take the first transmitting end to be decoded after the first transmitting end as the new first transmitting end, take the second OTFS symbol as the new first OTFS symbol, and execute S1; S5 : The
  • a wireless communication method including: a second sending end sending a third OTFS symbol; wherein a third time delay Doppler region of the third OTFS symbol carries a modulation symbol and a pilot frequency of the second sending end symbol, the third delay Doppler region includes an edge region and a non-edge region in the delay displacement dimension, and the average signal power of the modulation symbols on the edge region is higher or lower than the average signal power of the modulation symbols on the non-edge region .
  • a receiving end including: a communication unit and a processing unit, wherein the communication unit is configured to receive a first OTFS symbol, the first OTFS symbol is multiplexed by a plurality of sending ends, and a plurality of first OTFS symbols
  • the delay-Doppler regions carry modulation symbols and pilot symbols of multiple transmitters respectively, and the multiple delay-Doppler regions correspond to multiple transmitters one-to-one, and the multiple delay-Doppler regions do not overlap
  • the processing unit It is used to use the first to-be-decoded transmitting end among the multiple transmitting ends as the first transmitting end according to the channel decoding sequence of the multiple transmitting ends, and perform the following steps: S1: perform the first transmitting end according to the first OTFS symbol.
  • a transmitter comprising: a communication unit configured to transmit a third OTFS symbol; wherein a modulation symbol and a pilot frequency of the second transmitter are carried on a third delay Doppler region of the third OTFS symbol symbol, the third delay Doppler region includes an edge region and a non-edge region in the delay displacement dimension, and the average signal power of the modulation symbols on the edge region is higher or lower than the average signal power of the modulation symbols on the non-edge region .
  • a receiving end including a processor and a memory.
  • the memory is used for storing a computer program
  • the processor is used for calling and running the computer program stored in the memory to execute the method in the above-mentioned first aspect or each implementation manner thereof.
  • a transmitter including a processor and a memory.
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program stored in the memory to execute the method in the second aspect or each of its implementations.
  • an apparatus for implementing the method in any one of the above-mentioned first aspect to the second aspect or each implementation manner thereof.
  • the apparatus includes: a processor for invoking and running a computer program from a memory, so that a device installed with the apparatus executes the method in any one of the above-mentioned first aspect to the second aspect or each of its implementations .
  • a computer-readable storage medium for storing a computer program, and the computer program causes a computer to execute the method in any one of the above-mentioned first aspect to the second aspect or each implementation manner thereof.
  • a computer program product comprising computer program instructions, the computer program instructions cause a computer to execute the method in any one of the above-mentioned first to second aspects or the implementations thereof.
  • a computer program which, when run on a computer, causes the computer to perform the method of any one of the above-mentioned first to second aspects or each of the implementations thereof.
  • the receiving end can use the above-mentioned iterative de-interference method to perform channel estimation and decoding.
  • This de-interference method is to directly remove the interference generated by a certain transmitter or the interference generated by multiple transmitters, rather than The multi-user interference is equalized to eliminate the equalized interference.
  • the technical solution of the present application eliminates the interference more thoroughly, so that the reliability of the channel decoding result obtained by the receiving end is higher.
  • the receiving end can first remove the interference caused by the transmitting end with the strongest anti-interference ability, and then remove the interference caused by the transmitting end with the second strongest anti-interference ability, and so on, and finally remove the anti-interference ability.
  • the interference caused by the weakest transmitter can not only eliminate the interference more thoroughly, but also eliminate the interference in the order of anti-interference from strong to weak, which makes the interference cancellation more efficient.
  • FIG. 1 is a schematic diagram of a multi-user system 100 provided by an embodiment of the present application
  • FIG. 2 is a flowchart of a wireless communication method provided by an embodiment of the present application.
  • FIG. 3 is a schematic diagram of multiplexing of OTFS symbols provided by an embodiment of the present application.
  • FIG. 4 is a schematic diagram of an edge region provided by an embodiment of the present application.
  • FIG. 5 is a schematic diagram of another edge region provided by an embodiment of the present application.
  • FIG. 6 shows a schematic block diagram of a receiving end 600 according to an embodiment of the present application
  • FIG. 7 shows a schematic block diagram of a transmitter 700 according to an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of a communication device 800 provided by an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of a device according to an embodiment of the present application.
  • FIG. 10 is a schematic block diagram of a communication system 1000 provided by an embodiment of the present application.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • LTE-A Advanced Long Term Evolution
  • NR New Radio
  • evolution system of NR system LTE (LTE-based access to unlicensed spectrum, LTE-U) system on unlicensed spectrum, NR (NR-based) on unlicensed spectrum access to unlicensed spectrum, NR-U) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (Wireless Fidelity, WiFi), next-generation communication systems or other communication systems, etc.
  • UMTS Universal Mobile Telecommunication System
  • WLAN Wireless Local Area Networks
  • WiFi Wireless Fidelity
  • next-generation communication systems or other communication systems etc.
  • This embodiment of the present application does not limit the applied spectrum.
  • the embodiments of the present application may be applied to licensed spectrum, and may also be applied to unlicensed spectrum.
  • the multi-user system 100 may include multiple transmitters 110 and at least one receiver 120 .
  • FIG. 1 exemplarily shows one receiving end 120 and two sending ends 110.
  • the multi-user system 100 may include multiple receiving ends and other numbers of sending ends, which are not limited in this embodiment of the present application .
  • the receiving end in this application may be a network device and the transmitting end may be a terminal device, or the receiving end may be a terminal device and the transmitting end may be a network device, which is not limited in this application.
  • a device having a communication function in the network/system may be referred to as a communication device.
  • the communication device may be a network device or a terminal device.
  • a terminal device may also be referred to as a user equipment (User Equipment, UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, Wireless communication equipment, user agent or user equipment, etc.
  • UE User Equipment
  • the terminal device can be a station (STAION, ST) in the WLAN, can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a personal digital processing (Personal Digital Assistant, PDA) devices, handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, and next-generation communication systems, such as terminal devices in NR networks or Terminal equipment in the future evolved Public Land Mobile Network (Public Land Mobile Network, PLMN) network, etc.
  • STAION, ST in the WLAN
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • the terminal device may also be a wearable device.
  • Wearable devices can also be called wearable smart devices, which are the general term for the intelligent design of daily wear and the development of wearable devices using wearable technology, such as glasses, gloves, watches, clothing and shoes.
  • a wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-scale, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, which needs to cooperate with other devices such as smart phones.
  • a network device can be a device used to communicate with a mobile device.
  • the network device can be an access point (Access Point, AP) in WLAN, a base station (Base Transceiver Station, BTS) in GSM or CDMA, or a WCDMA
  • the base station (NodeB, NB) can also be an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, or a relay station or an access point, or a vehicle-mounted device, a wearable device, and a network device or base station in an NR network ( gNB) or network equipment in the future evolved PLMN network, etc.
  • gNB NR network
  • a network device provides services for a cell
  • a terminal device communicates with the network device through transmission resources (for example, frequency domain resources, or spectrum resources) used by the cell
  • the cell may be a network device (for example, a frequency domain resource).
  • the cell corresponding to the base station), the cell can belong to the macro base station, or it can belong to the base station corresponding to the small cell (Small cell), where the small cell can include: Metro cell, Micro cell, Pico cell cell), Femto cell, etc.
  • These small cells have the characteristics of small coverage and low transmit power, and are suitable for providing high-speed data transmission services.
  • Enhanced Mobile Broadband eMBB
  • Internet of Things Internet of Things, IoT
  • ultra-reliable and low-latency communication Ultra-reliable and Low Latency Communications, URLLC
  • millimeter wave communication scenarios etc.
  • FIG. 2 is a flowchart of a wireless communication method provided by an embodiment of the present application. As shown in FIG. 2 , the method includes:
  • Step S0 the receiving end receives the first OTFS symbol.
  • the receiving end uses the first sending end to be decoded among the multiple sending ends as the first sending end, and performs the following steps:
  • Step S1 the receiving end performs channel decoding on the first transmitting end according to the first OTFS symbol to obtain a channel decoding result.
  • Step S2 The receiving end judges whether the channel decoding result passes the verification, and if it passes the verification, executes step S3, otherwise, executes step S5.
  • Step S3 The receiving end determines whether there is a transmitting end to be decoded except the first transmitting end among the plurality of transmitting ends. If there is, go to step S4, otherwise, end.
  • Step S4 The receiving end estimates the received signal after the first transmitting end has experienced the channel to obtain the first received signal, and removes the first received signal in the first OTFS symbol to obtain the second OTFS symbol.
  • the first transmitting end to be decoded after the first transmitting end is taken as the new first transmitting end
  • the second OTFS symbol is taken as the new first OTFS symbol
  • step S1 is performed.
  • Step S5 The receiving end judges whether there is a transmitting end to be decoded except the first transmitting end among the plurality of transmitting ends. If there is, according to the channel decoding sequence, the first transmitting end to be decoded after the first transmitting end is used as the new first transmitting end, and step S1 is performed, otherwise, the process ends.
  • the first OTFS symbol is multiplexed by multiple transmitters.
  • the first OTFS symbol involves a delay shift dimension and a Doppler shift dimension. Therefore, it can be said that the first OTFS symbol includes multiple delays Doppler region, each delay Doppler region corresponds to a transmitter, each delay Doppler region carries modulation symbols and pilot symbols of the corresponding transmitter, and multiple transmitters correspond to multiple time delays.
  • the Yan Doppler regions There is no overlap between the Yan Doppler regions.
  • FIG. 3 shows the respective delay Doppler regions corresponding to the transmitting end 1, the transmitting end 2, the transmitting end 3 and the transmitting end 4, and the four delay Doppler regions do not overlap.
  • the unit corresponding to one Doppler shift on one time-delay shift may be referred to as the resource particle in the time-delay Doppler domain, or the unit corresponding to one Doppler shift on the previous time-delay shift may be referred to as the resource particle in the time-delay Doppler domain.
  • Resource particles in the delay-Doppler domain may be referred to as the resource particle in the time-delay Doppler domain.
  • the above-mentioned first OTFS symbol is composed of N ⁇ ⁇ N ⁇ resource particles in the delay Doppler domain, where N ⁇ and N ⁇ are both positive integers.
  • N ⁇ k ⁇ N ⁇ resource particles in the above-mentioned N ⁇ ⁇ N ⁇ resource particles are used to transmit the modulation symbols and derivation of the transmitting end. frequency symbol.
  • N is the number of the above-mentioned multiple senders
  • N ⁇ k is a positive integer smaller than N ⁇ .
  • the delay Doppler region can also be described as the delay Doppler region, which is not limited in this application.
  • the first transmitting end corresponds to the first delay Doppler region in the first OTFS symbol.
  • the process that the receiving end performs channel decoding on the first transmitting end according to the first OTFS symbol is as follows, but not limited to this: the receiving end performs channel estimation according to the pilot signal in the first delay Doppler region to obtain a channel estimation result .
  • the receiving end determines, according to the channel estimation result, the second delay Doppler region after channel delay spreading and delay shifting in the first delay Doppler region.
  • the receiving end demodulates the first transmitting end in the second delay Doppler region to obtain a demodulation result.
  • the receiving end performs channel decoding according to the demodulation result to obtain the channel decoding result.
  • the receiver can intercept N ⁇ k ⁇ N ⁇ resource particles corresponding to the sender from N ⁇ ⁇ N ⁇ resource particles, based on the pilot frequencies on the N ⁇ k ⁇ N ⁇ resource particles.
  • Channel estimation is performed on the signal to obtain the channel estimation result; based on the channel estimation result, N' ⁇ k ⁇ N ⁇ resource grains are intercepted from the N ⁇ ⁇ N ⁇ resource grains for demodulation, and the demodulation result is obtained; based on the demodulation result, the channel estimation
  • the channel decoding result is obtained by decoding, that is, the estimated bit stream corresponding to the kth transmitting end. Among them, due to the existence of channel delay spread and delay shift, N' ⁇ k ⁇ N ⁇ k .
  • the transmitting end to be decoded includes: two types of transmitting ends, one is the transmitting end that has not been decoded;
  • the OTFS symbol used by the sender in the current verification is different from the OTFS symbol used in the previous verification.
  • the receiving end may use a cyclic redundancy check (Cyclic redundancy check, CRC) to check the channel decoding result, but is not limited to this.
  • CRC Cyclic redundancy check
  • the receiving end may perform a convolution operation on the channel estimation result and the demodulation result to obtain the first received signal.
  • removing the first received signal in the first OTFS symbol to obtain the second OTFS symbol that is, subtracting the first received signal from the first OTFS symbol to obtain the second OTFS symbol, but not limited thereto.
  • the receiver can intercept N ⁇ k ⁇ N ⁇ resource particles corresponding to the transmitter from the N ⁇ ⁇ N ⁇ resource particles (that is, for the first OTFS symbol One interception), perform channel estimation based on pilot signals on N ⁇ k ⁇ N ⁇ resource particles, and obtain the channel estimation result (that is, perform channel estimation); intercept N' from N ⁇ ⁇ N ⁇ resource particles based on the channel estimation result ⁇ k ⁇ N ⁇ resource particles (that is, the second interception of the first OTFS symbol), demodulate the transmitting end based on N' ⁇ k ⁇ N ⁇ resource particles, and obtain a demodulation result (ie, perform demodulation); Channel decoding is performed on the demodulation result to obtain a channel decoding result b k (ie, channel decoding is performed). Further, if the channel decoding result passes the check, a convolution operation is performed on the channel estimation result and the demodulation result to obtain the first received signal
  • OTFS symbols will be distinguished by different indexes or numbers below, for example: OTFS symbol 1, OTFS symbol 2.
  • sender 1 there are 3 senders, namely sender 1, sender 2, and sender 3, and their channel decoding order is sender 1 ⁇ sender 2 ⁇ sender 3 ⁇ sender 1.
  • the receiving end first performs channel decoding on the transmitting end 1 according to the OTFS symbol 1 to obtain the channel decoding result.
  • the receiving end determines that the channel decoding result passes the check, and the receiving end determines that in addition to the transmitting end 1, the transmitting end 2 and the transmitting end 3 are the transmitting ends to be decoded, based on this, the receiving end estimates that the transmitting end 1 has experienced the channel After obtaining the received signal, the received signal of the transmitting end 1 is obtained, and the received signal of the transmitting end 1 in the first OTFS symbol 1 is removed to obtain the OTFS symbol 2 . The receiving end continues to perform channel decoding on the transmitting end 2 according to the OTFS symbol 2, and obtains the channel decoding result of the transmitting end 2.
  • the receiving end determines that the channel decoding result fails the verification, and the receiving end determines that in addition to the transmitting end 2, the transmitting end 3 is the transmitting end to be decoded, the receiving end continues to perform channel decoding on the transmitting end 3 according to the OTFS symbol 2, Obtain the channel decoding result of the sender 3.
  • the receiving end determines that the channel decoding result of the transmitting end 3 passes the verification, and the receiving end determines that in addition to the transmitting end 3, the transmitting end 2 is the transmitting end to be decoded, based on this, the receiving end estimates that the transmitting end 3 has experienced the channel
  • the received signal of the transmitting end 3 is obtained, and the received signal of the transmitting end 3 in the first OTFS symbol 2 is removed to obtain the OTFS symbol 3 .
  • the receiving end continues to perform channel decoding on the transmitting end 2 according to the OTFS symbol 3, and obtains the channel decoding result of the transmitting end 2. If the receiving end judges that the channel decoding result passes the check, and the receiving end determines that there is no transmitting end to be decoded except the transmitting end 2, the process ends.
  • sender 1 there are 3 senders, namely sender 1, sender 2, and sender 3, and their channel decoding order is sender 1 ⁇ sender 2 ⁇ sender 3 ⁇ sender 1.
  • the receiving end first performs channel decoding on the transmitting end 1 according to the OTFS symbol 1 to obtain the channel decoding result.
  • the receiving end determines that the channel decoding result passes the check, and the receiving end determines that in addition to the transmitting end 1, the transmitting end 2 and the transmitting end 3 are the transmitting ends to be decoded, based on this, the receiving end estimates that the transmitting end 1 has experienced the channel After obtaining the received signal, the received signal of the transmitting end 1 is obtained, and the received signal of the transmitting end 1 in the first OTFS symbol 1 is removed to obtain the OTFS symbol 2 . The receiving end continues to perform channel decoding on the transmitting end 2 according to the OTFS symbol 2, and obtains the channel decoding result of the transmitting end 2.
  • the receiving end determines that the channel decoding result fails the verification, and the receiving end determines that in addition to the transmitting end 2, the transmitting end 3 is the transmitting end to be decoded, the receiving end continues to perform channel decoding on the transmitting end 3 according to the OTFS symbol 2, Obtain the channel decoding result of the sender 3. If the receiving end determines that the channel decoding result of the transmitting end 3 has not passed the verification, and the receiving end determines that except the transmitting end 3, although the transmitting end 2 decodes and does not pass the verification, but the transmitting end 2 uses OTFS for the last decoding. Symbol 2, if the decoding uses the OTFS symbol 2 this time, therefore, it is not necessary to decode the sender 2.
  • the receiving end can use the above-mentioned iterative de-interference method for channel estimation and decoding.
  • This de-interference method is to directly remove the interference generated by a certain transmitter or the interference generated by multiple transmitters, and Instead of equalizing the multi-user interference to eliminate the equalized interference, the technical solution of the present application eliminates the interference more thoroughly, thereby making the channel decoding result obtained by the receiving end more reliable.
  • the receiver can use iterative de-interference method for channel estimation and decoding. Furthermore, the receiver can first remove the interference caused by the transmitter with the strongest anti-interference ability, and then remove the interference caused by the transmitter with the second strongest anti-interference ability. interference, and so on, and finally remove the interference caused by the transmitter with the weakest anti-interference ability.
  • the following optional methods can be used, but not limited to this:
  • each delay Doppler region includes an edge region and a non-edge region in the delay displacement dimension.
  • the set formed by the multiple transmitters includes a first transmitter set and a second transmitter set, and the average signal power deviation of each transmitter in the first transmitter set is greater than the average signal power deviation of each transmitter in the second transmitter set,
  • the average signal power deviation of the transmitter is the difference between the average signal power of the modulation symbols on the edge region of the delay Doppler region corresponding to the transmitter and the transmitter The deviation of the average signal power of the modulation symbols on the non-edge regions of the corresponding Delay Doppler region.
  • the edge area and the non-edge area may be predefined, or obtained after negotiation between the network device and the terminal device, which is not limited in this application.
  • the edge area includes: resource particles on at least one displacement in the delay displacement dimension.
  • FIG. 4 is a schematic diagram of an edge area provided by an embodiment of the application. As shown in FIG. 4 , for the kth transmitting end, the corresponding edge areas of the delay Doppler area are the 8th column and the 14th column The area, in this case the edge area, includes: a displacement on the resource particle.
  • FIG. 5 is a schematic diagram of another edge region provided by an embodiment of the present application. As shown in FIG. 5 , for the kth transmitting end, the corresponding edge regions of the delay Doppler region are the 8th, 9th and 13th columns. , 14-column area, in this case, the edge area includes: resource particles on 2 displacements.
  • the above-mentioned channel decoding sequence is a cyclic sequence from the first sending end set to the second sending end set, and the second sending end set to the first sending end.
  • the cyclic order in the first set of senders may be in ascending order of indexes corresponding to the senders, and the cyclic order in the second set of senders may also be in ascending order of indexes corresponding to the senders.
  • the above-mentioned multiple senders all correspond to unique indices
  • the first sender set includes senders whose indices are odd, that is, 1, 3, 5, and so on.
  • the second set of senders includes senders whose indices are even, that is, 0, 2, 4, 6, and so on.
  • the channel decoding order is 0 ⁇ 2 ⁇ 4 ⁇ 6 ⁇ 1 ⁇ 3 ⁇ 5 ⁇ 0, and so on.
  • the second set of senders includes senders whose indices are odd, that is, 1, 3, 5, and so on.
  • the first set of senders includes senders whose indices are even, that is, 2, 4, 6, and so on.
  • the channel decoding order is 1 ⁇ 3 ⁇ 5 ⁇ 0 ⁇ 2 ⁇ 4 ⁇ 6 ⁇ 1, and so on.
  • the delay Doppler regions corresponding to the above multiple transmitters are distributed according to the index from small to large, that is, the distribution order of the delay Doppler regions corresponding to multiple transmitters is: 0 ⁇ 1 ⁇ 2 ⁇ 3 ⁇ 4 ⁇ 5 ⁇ 6.
  • the indexes corresponding to each transmitter in the first transmitter set are all even numbers, and the indexes corresponding to each transmitter in the second transmitter set are all odd, and the delay Doppler regions of multiple transmitters are in the order of the indexes. Distributed in order from small to large.
  • the indices corresponding to each transmitter in the first transmitter set are odd numbers, the indices corresponding to each transmitter in the second transmitter set are even, and the delay Doppler regions of the multiple transmitters are listed in the order of the indexes. Distributed in order from small to large.
  • the average signal power deviation of each transmitter in the first transmitter set is greater than 0, and the average signal power deviation of each transmitter in the second transmitter set is less than or equal to 0. That is, the average signal power deviation of each transmitter in the first transmitter set is greater than the average signal power deviation of each transmitter in the second transmitter set.
  • the average signal power deviation of each transmitter in the first transmitter set is equal to 0, and the average signal power deviation of each transmitter in the second transmitter set is less than 0. That is, the average signal power deviation of each transmitter in the first transmitter set is greater than the average signal power deviation of each transmitter in the second transmitter set.
  • the receiver when the receiver uses the iterative de-interference method to perform channel estimation and decoding, the receiver can first remove the interference caused by the transmitter with the strongest anti-interference ability, and then remove the transmitter with the second strongest anti-interference ability. The interference caused by the interference, and so on, finally remove the interference caused by the transmitter with the weakest anti-interference, so that not only can the interference be eliminated more thoroughly, but also the method of eliminating the interference in the order of anti-interference from strong to weak makes the It is more efficient to eliminate interference.
  • the above embodiment mainly introduces the iterative anti-interference method adopted by the receiving end.
  • the OTFS symbols of the transmitting end side method will be introduced below:
  • the second sending end may send the third OTFS symbol to the receiving end; wherein, the second sending end may be any sending end among the above-mentioned multiple sending ends.
  • the third delay Doppler region of the third OTFS symbol carries the modulation symbols and pilot symbols of the second transmitting end, and the third delay Doppler region includes edge regions and non-edge regions in the delay displacement dimension.
  • the average signal power of the modulation symbols on the regions is higher or lower than the average signal power of the modulation symbols on the non-edge regions.
  • the third delay Doppler region is composed of N ⁇ k ⁇ N ⁇ resource particles, and the third delay Doppler corresponding to the transmitter
  • D represents the resource particle where the modulation symbol is located
  • S represents the resource particle where the pilot symbol is located
  • all other resource particles are set to 0.
  • the corresponding edge regions of the third delay Doppler region are the regions in the 8th column and the 14th column.
  • the average signal power of the modulation symbols on the edge region is higher or lower than the average signal power of the modulation symbols on the non-edge region. As shown in FIG.
  • the corresponding edge regions of the third delay Doppler region are the regions in the 8th and 9th columns and the 13th and 14th columns.
  • the average signal power of the modulation symbols on the edge region is higher or lower than the average signal power of the modulation symbols on the non-edge region.
  • the modulation symbols and pilot symbols of the second transmitter are placed on the resource particles in the delay-Doppler region to form the third OTFS symbol in the delay-Doppler region, and then the third OTFS symbol After Sympetic Fourier Transform to the time-frequency domain, a time-frequency domain signal composed of particles in the time-frequency domain is formed, as shown in expression (1).
  • x[k,l] is the complex value of the third OTFS symbol on the time-delay-doppler region resource particle where the coordinate in the time-delay displacement dimension is k, and the coordinate in the Doppler-displacement dimension is l
  • X [n,m] is the complex value on the time-frequency domain resource particle whose coordinate in the time-domain dimension is n and the coordinate in the frequency-domain dimension is m after the third OTFS symbol is converted to the time-frequency domain.
  • the granularity in the Yan Doppler region is Among them, ⁇ f represents the frequency domain granularity in the time-frequency domain, and ⁇ t represents the time domain granularity in the time-frequency domain.
  • the third OTFS symbol includes N f ⁇ N t time-delayed Doppler resource grains, and the third OTFS symbol is transformed into N t ⁇ N f time-frequency domain resource grains through symplectic Fourier transformation, and N t positive resource grains in the time domain dimension
  • An Orthogonal Frequency Division Multiplexing (OFDM) symbol has N f subcarriers in the frequency domain dimension.
  • the average signal power on resource particles placed at the edge of the delay dimension by the transmitting end is higher or lower than the average signal power on other resource particles in the delay Doppler region occupied by the transmitting end.
  • the receiving end can demodulate the transmitting end with the strongest anti-interference first according to this technology.
  • FIG. 6 shows a schematic block diagram of a receiving end 600 according to an embodiment of the present application. As shown in Figure 6, the receiving end includes:
  • the communication unit 610 is configured to receive a first OTFS symbol, the first OTFS symbol is multiplexed by a plurality of transmitting ends, and a plurality of delay Doppler regions of the first OTFS symbol respectively carry modulation symbols and pilot symbols of the plurality of transmitting ends , the multiple delay-Doppler regions correspond to the multiple transmitters one-to-one, and the multiple delay-Doppler regions do not overlap.
  • the processing unit 620 is configured to, according to the channel decoding sequence of the multiple sending ends, use the first sending end to be decoded among the multiple sending ends as the first sending end, and perform the following steps:
  • S1 Perform channel decoding on the first transmitting end according to the first OTFS symbol to obtain a channel decoding result.
  • S3 Determine whether there is a to-be-decoded transmitting end other than the first transmitting end among the plurality of transmitting ends. If it exists, execute S4, otherwise, end.
  • S4 Estimate the received signal after the first transmitting end has experienced the channel to obtain the first received signal, and remove the first received signal in the first OTFS symbol to obtain the second OTFS symbol. According to the channel decoding sequence, take the first transmitting end to be decoded after the first transmitting end as the new first transmitting end, take the second OTFS symbol as the new first OTFS symbol, and perform S1.
  • S5 Determine whether there is a to-be-decoded transmitting end other than the first transmitting end among the plurality of transmitting ends. If there is, according to the channel decoding sequence, the first transmitting end to be decoded after the first transmitting end is regarded as the new first transmitting end, and S1 is performed, otherwise, the end is ended.
  • each delay Doppler region includes an edge region and a non-edge region in the delay displacement dimension.
  • the set formed by the multiple transmitters includes a first transmitter set and a second transmitter set, and the average signal power deviation of each transmitter in the first transmitter set is greater than the average signal power deviation of each transmitter in the second transmitter set,
  • the average signal power deviation of the transmitter is the difference between the average signal power of the modulation symbols on the edge region of the delay Doppler region corresponding to the transmitter and the transmitter The deviation of the average signal power of the modulation symbols on the non-edge regions of the corresponding Delay Doppler region.
  • the channel decoding sequence is a cyclic sequence from the first transmitter set to the second transmitter set, and the second transmitter set to the first transmitter set.
  • the first set of sending ends and the second set of sending ends there are at least one pair of sending ends occupying adjacent delay Doppler regions, and the at least one pair of sending ends belong to the first set of sending ends and the second set of sending ends respectively. end collection.
  • the indexes corresponding to each transmitting end in the first transmitting end set are all even numbers
  • the indexes corresponding to each transmitting end in the second transmitting end set are all odd numbers
  • the delay Doppler regions of the multiple transmitting ends are based on the indexes. The order is distributed from small to large.
  • the indexes corresponding to each transmitter in the first transmitter set are odd numbers
  • the indexes corresponding to each transmitter in the second transmitter set are even numbers
  • the delay Doppler regions of multiple transmitters are based on the index. The order is distributed from small to large.
  • the average signal power deviation of each transmitter in the first transmitter set is greater than 0, and the average signal power deviation of each transmitter in the second transmitter set is less than or equal to 0.
  • the average signal power deviation of each transmitter in the first transmitter set is equal to 0, and the average signal power deviation of each transmitter in the second transmitter set is less than 0.
  • the edge area includes: resource particles on at least one displacement in the delay displacement dimension.
  • the first transmitting end corresponds to the first delay Doppler region in the first OTFS symbol.
  • the processing unit 620 is specifically configured to: perform channel estimation according to the pilot signal in the first delay Doppler region to obtain a channel estimation result.
  • the second delay Doppler region after channel delay spreading and delay shifting is performed in the first delay Doppler region is determined.
  • the first transmitting end is demodulated in the second delay Doppler region to obtain a demodulation result.
  • Channel decoding is performed according to the demodulation result to obtain a channel decoding result.
  • the above-mentioned communication unit may be a communication interface or a transceiver, or an input/output interface of a communication chip or a system-on-chip.
  • the aforementioned processing unit may be one or more processors.
  • the receiving end 600 may correspond to the receiving end in the above method embodiments, and the above-mentioned and other operations and/or functions of each unit in the receiving end 600 are respectively for realizing the receiving end in the above method embodiments.
  • the corresponding process corresponding to the terminal is not repeated here for brevity.
  • FIG. 7 shows a schematic block diagram of a transmitting end 700 according to an embodiment of the present application.
  • the sending end is the second sending end, as shown in FIG. 7 , the sending end includes:
  • the communication unit 710 is configured to send the third OTFS symbol.
  • the third delay Doppler region of the third OTFS symbol carries the modulation symbols and pilot symbols of the second transmitting end, and the third delay Doppler region includes the edge region and the non-edge region in the delay displacement dimension,
  • the average signal power of the modulation symbols on the edge regions is higher or lower than the average signal power of the modulation symbols on the non-edge regions.
  • the edge area includes: resource particles on at least one displacement in the delay displacement dimension.
  • the above-mentioned communication unit may be a communication interface or a transceiver, or an input/output interface of a communication chip or a system-on-chip.
  • the transmitting end 700 may correspond to the transmitting end in the foregoing method embodiments, and the above and other operations and/or functions of each unit in the transmitting end 700 are respectively for realizing the transmitting end in the foregoing method embodiments.
  • the corresponding process corresponding to the terminal is not repeated here for brevity.
  • FIG. 8 is a schematic structural diagram of a communication device 800 provided by an embodiment of the present application.
  • the communication device 800 shown in FIG. 8 includes a processor 810, and the processor 810 can call and run a computer program from a memory, so as to implement the method in the embodiment of the present application.
  • the communication device 800 may further include a memory 820 .
  • the processor 810 may call and run a computer program from the memory 820 to implement the methods in the embodiments of the present application.
  • the memory 820 may be a separate device independent of the processor 810 , or may be integrated in the processor 810 .
  • the communication device 800 may further include a transceiver 830, and the processor 810 may control the transceiver 830 to communicate with other devices, specifically, may send information or data to other devices, or receive other Information or data sent by the device.
  • the communication device 800 may specifically be the receiving end of the embodiments of the present application, and the communication device 800 may implement the corresponding processes implemented by the receiving end in each method of the embodiments of the present application, and for brevity, details are not repeated here. .
  • the communication device 800 may specifically be the transmitting end of the embodiments of the present application, and the communication device 800 may implement the corresponding processes implemented by the transmitting end in each method of the embodiments of the present application. For brevity, details are not repeated here. .
  • FIG. 9 is a schematic structural diagram of an apparatus according to an embodiment of the present application.
  • the apparatus 900 shown in FIG. 9 includes a processor 910, and the processor 910 can call and run a computer program from a memory, so as to implement the method in the embodiment of the present application.
  • the apparatus 900 may further include a memory 920 .
  • the processor 910 may call and run a computer program from the memory 920 to implement the methods in the embodiments of the present application.
  • the memory 920 may be a separate device independent of the processor 910 , or may be integrated in the processor 910 .
  • the apparatus 900 may further include an input interface 930 .
  • the processor 910 may control the input interface 930 to communicate with other devices or chips, and specifically, may acquire information or data sent by other devices or chips.
  • the apparatus 900 may further include an output interface 940 .
  • the processor 910 can control the output interface 940 to communicate with other devices or chips, and specifically, can output information or data to other devices or chips.
  • the apparatus may be applied to the receiving end in the embodiments of the present application, and the apparatus may implement the corresponding processes implemented by the receiving end in each method of the embodiments of the present application, which will not be repeated here for brevity.
  • the apparatus may be applied to the transmitting end in the embodiments of the present application, and the apparatus may implement the corresponding processes implemented by the transmitting end in each method of the embodiments of the present application, which will not be repeated here for brevity.
  • the device mentioned in the embodiment of the present application may also be a chip.
  • it can be a system-on-chip, a system-on-a-chip, a system-on-a-chip, or a system-on-a-chip.
  • FIG. 10 is a schematic block diagram of a communication system 1000 provided by an embodiment of the present application. As shown in FIG. 10 , the communication system 1000 includes a receiving end 1010 and a transmitting end 1020 .
  • the receiving end 1010 can be used to realize the corresponding functions realized by the receiving end in the above method
  • the transmitting end 1020 can be used to realize the corresponding functions realized by the transmitting end in the above method.
  • the details are not repeated here. .
  • the processor in this embodiment of the present application may be an integrated circuit chip, which has a signal processing capability.
  • each step of the above method embodiment may be completed by a hardware integrated logic circuit in a processor or an instruction in the form of software.
  • the above-mentioned processor can be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other available Programming logic devices, discrete gate or transistor logic devices, discrete hardware components.
  • DSP Digital Signal Processor
  • ASIC Application Specific Integrated Circuit
  • FPGA Field Programmable Gate Array
  • a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the steps of the methods disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor.
  • the software module may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art.
  • the storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.
  • the memory in this embodiment of the present application may be a volatile memory or a non-volatile memory, or 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 may be Random Access Memory (RAM), which acts as an external cache.
  • RAM Static RAM
  • DRAM Dynamic RAM
  • SDRAM Synchronous DRAM
  • SDRAM double data rate synchronous dynamic random access memory
  • Double Data Rate SDRAM DDR SDRAM
  • enhanced SDRAM ESDRAM
  • synchronous link dynamic random access memory Synchlink DRAM, SLDRAM
  • Direct Rambus RAM Direct Rambus RAM
  • the memory in the embodiment of the present application may also be a static random access memory (static RAM, SRAM), a dynamic random access memory (dynamic RAM, DRAM), Synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM) and so on. That is, the memory in the embodiments of the present application is intended to include but not limited to these and any other suitable types of memory.
  • Embodiments of the present application further provide a computer-readable storage medium for storing a computer program.
  • the computer-readable storage medium can be applied to the network device or the base station in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the network device or the base station in each method of the embodiments of the present application, in order to It is concise and will not be repeated here.
  • the computer-readable storage medium can be applied to the mobile terminal/terminal device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the mobile terminal/terminal device in each method of the embodiments of the present application. , and are not repeated here for brevity.
  • Embodiments of the present application also provide a computer program product, including computer program instructions.
  • the computer program product can be applied to the network device or the base station in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the network device or the base station in the various methods of the embodiments of the present application, for the sake of brevity. , and will not be repeated here.
  • the computer program product can be applied to the mobile terminal/terminal device in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the mobile terminal/terminal device in each method of the embodiments of the present application, For brevity, details are not repeated here.
  • the embodiments of the present application also provide a computer program.
  • the computer program can be applied to the network device or the base station in the embodiments of the present application, and when the computer program runs on the computer, the computer can execute the corresponding methods implemented by the network device or the base station in each method of the embodiments of the present application.
  • the process for the sake of brevity, will not be repeated here.
  • the computer program can be applied to the mobile terminal/terminal device in the embodiments of the present application, and when the computer program runs on the computer, the computer program is implemented by the mobile terminal/terminal device in each method of the embodiments of the present application.
  • the corresponding process for the sake of brevity, will not be repeated here.
  • the disclosed system, apparatus and method may be implemented in other manners.
  • the apparatus embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • the functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium.
  • the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution.
  • the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program codes .

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

Les modes de réalisation de la présente demande concernent un procédé de communication sans fil, une extrémité d'envoi et une extrémité de réception. Selon ledit procédé : une extrémité de réception peut effectuer une estimation et un décodage de canal dans un mode itératif d'élimination d'interférence, et le mode d'élimination d'interférence vise à supprimer directement l'interférence générée par une ou plusieurs extrémités d'envoi, de telle sorte que la fiabilité d'un résultat de décodage de canal obtenu par l'extrémité de réception est plus élevée.
PCT/CN2020/122437 2020-10-21 2020-10-21 Procédé de communication sans fil, extrémité d'envoi, et extrémité de réception WO2022082494A1 (fr)

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CN202080103163.6A CN115843428A (zh) 2020-10-21 2020-10-21 无线通信方法、发送端和接收端

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