CN115843428A

CN115843428A - Wireless communication method, transmitting end and receiving end

Info

Publication number: CN115843428A
Application number: CN202080103163.6A
Authority: CN
Inventors: 陈晋辉; 徐伟杰; 左志松; 张治�
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-10-21
Filing date: 2020-10-21
Publication date: 2023-03-24
Also published as: WO2022082494A1

Abstract

The embodiment of the application provides a wireless communication method, a sending end and a receiving end, which comprises the following steps: the receiving end can adopt an iterative interference elimination mode to carry out channel estimation and decoding, and the interference elimination mode is to directly eliminate the interference generated by one or more sending ends, so that the reliability of the channel decoding result obtained by the receiving end is higher.

Description

Wireless communication method, transmitting end and receiving end

Technical Field

The present invention relates to the field of communications, and in particular, to a wireless communication method, a transmitting end, and a receiving end.

Background

Orthogonal Time Frequency Space (OTFS) uses a new type of carrier in the delay-doppler domain to implement the multiplexing of Quadrature Amplitude Modulation (QAM) symbols. The OTFS technique may be applied to a multi-user system, that is, a communication system including multiple transmitting ends and one receiving end, and currently, a Linear Minimum Mean Square Error (LMMSE) receiving end is mainly used to receive received signals from multiple users. The LMMSE receiving end adopts an LMMSE equalizer to equalize a received signal, the equalization principle of the LMMSE equalizer is to equalize the minimum mean square error between the received signal and a transmitted signal by eliminating intersymbol interference and multi-user interference caused by multipath, and the equalization mode only eliminates the intersymbol interference and the multi-user interference caused by the multipath after the intersymbol interference and the multi-user interference caused by the multipath are equalized, so that the reliability of a channel decoding result obtained by the receiving end is low.

Disclosure of Invention

The embodiment of the application provides a wireless communication method, a sending end and a receiving end, so that the reliability of a channel decoding result obtained by the receiving end is higher.

In a first aspect, a wireless communication method is provided, including: a receiving terminal receives a first OTFS symbol, the first OTFS symbol is multiplexed by a plurality of sending terminals, a plurality of delay Doppler areas of the first OTFS symbol respectively bear modulation symbols and pilot symbols of the plurality of sending terminals, the plurality of delay Doppler areas correspond to the plurality of sending terminals one by one, and the plurality of delay Doppler areas are not overlapped; the receiving end takes a first sending end to be decoded in the plurality of sending ends as a first sending end according to the channel decoding sequence of the plurality of sending ends, and executes the following steps: s1: the receiving end carries out channel decoding on the first sending end according to the first OTFS symbol to obtain a channel decoding result; s2: the receiving end judges whether the channel decoding result passes the verification, if the channel decoding result passes the verification, S3 is executed, otherwise, the step S5 is executed; s3: the receiving end judges whether a transmitting end to be decoded exists in the plurality of transmitting ends except the first transmitting end; if yes, executing S4, otherwise, ending; s4: the receiving end estimates a receiving signal of the first sending end after the first sending end passes through the channel to obtain a first receiving signal, and removes the first receiving signal in the first OTFS symbol to obtain a second OTFS symbol; according to the channel decoding sequence, taking a first sending end to be decoded after the first sending end as a new first sending end, taking the second OTFS symbol as a new first OTFS symbol, and executing S1; s5: the receiving end judges whether a transmitting end to be decoded exists in the plurality of transmitting ends except the first transmitting end; and if so, taking the first sending end to be decoded after the first sending end as a new first sending end according to the channel decoding sequence, and executing S1, otherwise, ending.

In a second aspect, a wireless communication method is provided, including: the second sending end sends a third OTFS symbol; the third delay doppler region of the third OTFS symbol carries a modulation symbol and a pilot symbol of the second transmitting end, the third delay doppler region includes an edge region and a non-edge region in a delay displacement dimension, and an average signal power of the modulation symbol in the edge region is higher or lower than an average signal power of the modulation symbol in the non-edge region.

In a third aspect, a receiving end is provided, including: the system comprises a communication unit and a processing unit, wherein the communication unit is used for receiving a first OTFS symbol, the first OTFS symbol is multiplexed by a plurality of sending terminals, a plurality of delay Doppler areas of the first OTFS symbol respectively bear modulation symbols and pilot symbols of the plurality of sending terminals, the plurality of delay Doppler areas correspond to the plurality of sending terminals one to one, and the plurality of delay Doppler areas are not overlapped; the processing unit is configured to use a first to-be-decoded transmitting end of the multiple transmitting ends as a first transmitting end according to a channel decoding order of the multiple transmitting ends, and execute the following steps: s1: performing channel decoding on the first sending end according to the first OTFS symbol to obtain a channel decoding result; s2: judging whether the channel decoding result passes the verification, if so, executing S3, otherwise, executing the step S5; s3: judging whether a transmitting end to be decoded exists in the plurality of transmitting ends except the first transmitting end; if yes, executing S4, otherwise, ending; s4: estimating a received signal of a first sending end after the first sending end passes through a channel to obtain a first received signal, and removing the first received signal in the first OTFS symbol to obtain a second OTFS symbol; according to the channel decoding sequence, taking a first sending end to be decoded after the first sending end as a new first sending end, taking the second OTFS symbol as a new first OTFS symbol, and executing S1; s5: judging whether a sending end to be decoded exists in the plurality of sending ends except the first sending end; if yes, taking the first sending end to be decoded after the first sending end as a new first sending end according to the channel decoding sequence, and executing S1, otherwise, ending.

In a fourth aspect, a transmitting end is provided, including: a communication unit, configured to send a third OTFS symbol; the third delay doppler region of the third OTFS symbol carries a modulation symbol and a pilot symbol of the second transmitting end, the third delay doppler region includes an edge region and a non-edge region in a delay displacement dimension, and an average signal power of the modulation symbol in the edge region is higher or lower than an average signal power of the modulation symbol in the non-edge region.

In a fifth aspect, a receiving end is provided, which includes a processor and a memory. The memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory, and executing the method in the first aspect or each implementation manner thereof.

In a sixth aspect, a transmitting end is provided and includes a processor and a memory. The memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory, and executing the method of the second aspect or each implementation mode thereof.

In a seventh aspect, an apparatus is provided for implementing the method in any one of the first to second aspects or implementations thereof.

Specifically, the apparatus includes: a processor configured to call and run the computer program from the memory, so that the device on which the apparatus is installed performs the method according to any one of the first aspect to the second aspect or the implementation manner thereof.

In an eighth aspect, a computer-readable storage medium is provided for storing a computer program, the computer program causing a computer to perform the method of any one of the first to second aspects or implementations thereof.

In a ninth aspect, there is provided a computer program product comprising computer program instructions to cause a computer to perform the method of any one of the first to second aspects or implementations thereof.

A tenth aspect provides a computer program which, when run on a computer, causes the computer to perform the method of any one of the first to second aspects or implementations thereof.

Through the technical scheme, the receiving end can adopt the iteration interference removing mode to carry out channel estimation and decoding, the interference removing mode is to directly remove the interference generated by a certain sending end or the interference generated by a plurality of sending ends, and the interference after the balance is eliminated instead of carrying out balance consideration on multi-user interference.

Furthermore, through the power non-uniform distribution technology, the receiving end can firstly remove the interference caused by the transmitting end with the strongest interference immunity, then remove the interference caused by the transmitting end with the second strongest interference immunity, and so on, and finally remove the interference caused by the transmitting end with the weakest interference immunity, so that the interference can be eliminated more thoroughly, and the interference elimination efficiency is higher by adopting the method of eliminating the interference according to the sequence of the interference immunity from strong to weak.

Drawings

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 according to an embodiment of the present application;

fig. 3 is a schematic diagram of multiplexing an OTFS symbol provided in an embodiment of the present application;

FIG. 4 is a schematic diagram of an edge region according to an embodiment of the present disclosure;

FIG. 5 is a schematic view of another edge region provided in 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 transmitting end 700 according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a communication device 800 according to an embodiment of the present application;

FIG. 9 is a schematic block diagram of an apparatus of an embodiment of the present application;

fig. 10 is a schematic block diagram of a communication system 1000 provided in an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art without making any creative effort with respect to the embodiments in the present application belong to the protection scope of the present application.

The embodiment of the application can be applied to a multi-user system in various communication systems, such as: a Global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS), a Long Term Evolution (Long Term Evolution, LTE) System, an Advanced Long Term Evolution (LTE-a) System, a New Radio, NR, an Evolution System of an NR System, an LTE (LTE-based Access to unlicensed spectrum, LTE-U) System on an unlicensed spectrum, an NR (NR-based Access to unlicensed spectrum, NR-U) System on an unlicensed spectrum, a Universal Mobile communication System (Universal Mobile telecommunications System), a Wireless Local Area network (UMTS) System, a Wireless Local Area Network (WLAN) System, and other Wireless communication systems.

The frequency spectrum of the application is not limited in the embodiment of the present application. For example, the embodiments of the present application may be applied to a licensed spectrum and may also be applied to an unlicensed spectrum.

Illustratively, a multi-user system 100 applied to the embodiment of the present application is shown in fig. 1. The multi-user system 100 may include a plurality of transmitters 110 and at least one receiver 120.

Fig. 1 exemplarily shows one receiving end 120 and two transmitting ends 110, and optionally, the multi-user system 100 may include a plurality of receiving ends and other numbers of transmitting ends, which is not limited in this embodiment.

It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and/or" herein is merely an association relationship describing an associated object, and means that there may be three relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

It should be understood that, in the present application, a receiving end may be a network device, and a sending end may be a terminal device, or a receiving end is a terminal device, and a sending end is a network device, which is not limited in the present application.

It should be understood that, in the embodiments of the present application, a device having a communication function in a network/system may be referred to as a communication device. The communication device may be a network device or a terminal device.

It should be understood that a terminal device can also be referred to as a User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a User terminal, a wireless communication device, a User agent, or a User Equipment, etc. The terminal device may be a Station (ST) in a WLAN, and may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA) device, a handheld device with Wireless communication function, a computing device or other processing device connected to a Wireless modem, a vehicle-mounted device, a wearable device, and a next generation communication system, for example, a terminal device in an NR Network or a terminal device in a future-evolution Public Land Mobile Network (PLMN) Network, and the like.

By way of example and not limitation, in the embodiments of the present application, the terminal device may also be a wearable device. Wearable equipment can also be called wearable intelligent equipment, is the general term of applying wearable technique to carry out intelligent design, develop the equipment that can dress to daily wearing, like glasses, gloves, wrist-watch, dress and shoes etc.. A wearable device is a portable device that is worn directly on the body or integrated into the clothing or accessories of the user. The wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction and cloud interaction. The generalized wearable smart device includes full functionality, large size, and can implement full or partial functionality without relying on a smart phone, such as: smart watches or smart glasses and the like, and only focus on a certain type of application functions, and need to be used in cooperation with other devices such as smart phones, such as various smart bracelets for physical sign monitoring, smart jewelry and the like.

The network device may be a device for communicating with a mobile device, and the network device may be an Access Point (AP) in a WLAN, a Base Station (BTS) in GSM or CDMA, a Base Station (NodeB, NB) in WCDMA, an evolved Node B (eNB, eNodeB) in LTE, a relay Station or an Access Point, or a network device or a Base Station (gNB) in a vehicle-mounted device, a wearable device, and an NR network, or a network device in a PLMN network for future evolution.

In this embodiment of the present application, a network device provides a service for a cell, and a terminal device communicates with the network device through a transmission resource (for example, a frequency domain resource or a spectrum resource) used by the cell, where the cell may be a cell corresponding to the network device (for example, a base station), and the cell may belong to a macro base station or a base station corresponding to a Small cell (Small cell), where the Small cell may include: urban cells (Metro cells), micro cells (Micro cells), pico cells (Pico cells), femto cells (Femto cells), and the like, and the small cells have the characteristics of small coverage area and low transmission power, and are suitable for providing high-rate data transmission services.

Optionally, the present application may be applied to the following scenarios, but is not limited thereto: enhanced Mobile Broadband (eMBB), internet of Things (IoT), ultra-reliable and Low Latency Communications (URLLC), millimeter wave communication scenarios, and the like.

The technical scheme of the application will be explained in detail as follows:

fig. 2 is a flowchart of a wireless communication method according to an embodiment of the present application, and as shown in fig. 2, the method includes:

step S0: the receiving end receives a first OTFS symbol.

Further, the receiving end takes a first sending end to be decoded in the multiple sending ends as a first sending end according to the channel decoding sequence of the multiple sending ends, and executes the following steps:

step S1: and the receiving end performs channel decoding on the first sending 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 check, if the channel decoding result passes the check, the step S3 is executed, otherwise, the step S5 is executed.

And step S3: the receiving end judges whether a transmitting end to be decoded exists in the plurality of transmitting ends except the first transmitting end. If yes, executing step S4, otherwise, ending.

And step S4: and the receiving end estimates a receiving signal of the first sending end after the first sending end passes through the channel to obtain a first receiving signal, and removes the first receiving signal in the first OTFS symbol to obtain a second OTFS symbol. According to the channel decoding sequence, the first sending end to be decoded after the first sending end is used as a new first sending end, the second OTFS symbol is used as a new first OTFS symbol, and step S1 is executed.

Step S5: the receiving end judges whether a transmitting end to be decoded exists in the plurality of transmitting ends except the first transmitting end. And if so, taking the first sending end to be decoded after the first sending end as a new first sending end according to the channel decoding sequence, and executing the step S1, otherwise, ending.

As shown in fig. 3, the first OTFS symbol relates to a delay displacement dimension and a doppler displacement dimension, so that the first OTFS symbol may be said to include a plurality of delay doppler regions, each delay doppler region corresponds to one transmitting end, each delay doppler region carries a modulation symbol and a pilot symbol of the corresponding transmitting end, and a plurality of delay doppler regions corresponding to a plurality of transmitting ends are not overlapped. For example, fig. 3 shows delay doppler regions corresponding to a transmitting end 1, a transmitting end 2, a transmitting end 3, and a transmitting end 4, where the 4 delay doppler regions do not overlap.

Alternatively, a cell corresponding to one doppler shift on one delay shift may be referred to as a resource particle on the delay-doppler domain, or a cell corresponding to one delay shift on one doppler shift may be referred to as a resource particle on the delay-doppler domain.

Optionally, the first OTFS symbol is represented by N in the delay-doppler domain _τ ×N _ν Resource particle constitution, N _τ And N _ν Are all positive integers.

Optionally, the N is for a k-th transmitting end according to the channel decoding order of the plurality of transmitting ends _τ ×N _ν N in one resource particle _τk ×N _ν The resource granules are used for transmitting the modulation symbols and pilot symbols of the transmitting end. Wherein k is more than or equal to 1 and less than or equal to N, N is the number of the plurality of transmitting ends, N _τk Is less than N _τ Is a positive integer of (1).

It should be understood that the delay-doppler region can also be described as a delay-doppler domain, which is not limited in this application.

Optionally, it is assumed that the first transmitting end corresponds to a first delay-doppler region in the first OTFS symbol. Based on this, the process of the receiving end performing channel decoding on the first sending end according to the first OTFS symbol is as follows, but not limited to this: and the receiving end carries out channel estimation according to the pilot signal in the first time delay Doppler region to obtain a channel estimation result. And the receiving end determines a second time delay Doppler area after the first time delay Doppler area carries out channel time delay diffusion and time delay displacement according to the channel estimation result. The receiving end demodulates the first sending end in the second time delay Doppler area to obtain a demodulation result. And the receiving end carries out channel decoding according to the demodulation result to obtain a channel decoding result.

For example: for the k-th sending end, the receiving end can be from N _τ ×N _ν Intercepting N corresponding to the sending terminal from resource particles _τk ×N _ν Resource particles based on N _τk ×N _ν Performing channel estimation on the pilot signals on the resource particles to obtain a channel estimation result; from N based on the channel estimation result _τ ×N _ν Intercepting N 'from resource particles' _τk ×N _ν Demodulating the resource particles to obtain demodulation results; and performing channel decoding based on the demodulation result to obtain a channel decoding result, namely the estimated bit stream corresponding to the kth sending end. Wherein, N 'due to the existence of channel delay diffusion and delay displacement' _τk ≥N _τk 。

It should be understood that, in the present application, the transmitting end to be decoded includes: two types of sending ends, one is a sending end which is not decoded; the other type is that the channel decoding result is not verified after decoding, and the OTFS symbol adopted by the sending end in the current time to be verified is different from the OTFS symbol adopted in the last time to be verified.

Optionally, the receiving end may check the channel decoding result by using a Cyclic Redundancy Check (CRC), but is not limited thereto.

Optionally, the receiving end may perform a convolution operation on the channel estimation result and the demodulation result to obtain the first received signal.

Optionally, the first received signal in the first OTFS symbol is removed to obtain a second OTFS symbol, that is, the first received signal is subtracted from the first OTFS symbol to obtain the second OTFS symbol, but is not limited thereto.

For example: as shown in fig. 3, for the kth transmitting end, the receiving end may be from N _τ ×N _ν Intercepting N corresponding to the sending terminal from resource particles _τk ×N _ν Resource granule (i.e. one truncation of the first OTFS symbol), based on N _τk ×N _ν Performing channel estimation on the pilot signals on the resource particles to obtain a channel estimation result (namely performing channel estimation); from N based on the channel estimation result _τ ×N _ν Intercepting N 'from resource particles' _τk ×N _ν One resource granule (i.e. the second truncation of the first OTFS symbol), based on N' _τk ×N _ν The resource particles demodulate the sending end to obtain a demodulation result (namely, demodulation is carried out); performing channel decoding based on the demodulation result to obtain a channel decoding result b _k (i.e., perform channel decoding). Further, if the channel decoding result passes the check, performing convolution operation on the channel estimation result and the demodulation result to obtain a first received signal x _k And removing x in the first OTFS symbol _k 。

The following exemplifies steps S1 to S5 described above:

before setting forth the examples, the following is explained: to facilitate distinguishing OTFS symbols, different OTFS symbols will be distinguished below by different indices or numbers, for example: OTFS symbol 1, OTFS symbol 2.

Illustratively, assume that there are 3 transmitting ends, respectively, transmitting end 1, transmitting end 2, and transmitting end 3, whose channel decoding order is transmitting end 1 → transmitting end 2 → transmitting end 3 → transmitting end 1. The receiving end firstly carries out channel decoding on the sending end 1 according to the OTFS symbol 1 to obtain a channel decoding result. If the receiving end judges that the channel decoding result passes the verification, and the receiving end determines that the sending end 2 and the sending end 3 are both the sending ends to be decoded besides the sending end 1, based on this, the receiving end estimates the received signal of the sending end 1 after the channel is experienced, obtains the received signal of the sending end 1, and removes the received signal of the sending end 1 in the first OTFS symbol 1, so as to obtain the OTFS symbol 2. The receiving end continues to perform channel decoding on the sending end 2 according to the OTFS symbol 2 to obtain a channel decoding result of the sending end 2. If the receiving end judges that the channel decoding result does not pass the verification, and the receiving end determines that the sending end 3 is the sending end to be decoded besides the sending end 2, the receiving end continues to perform channel decoding on the sending end 3 according to the OTFS symbol 2 to obtain the channel decoding result of the sending end 3. If the receiving end judges that the channel decoding result of the sending end 3 passes the check, and the receiving end determines that the sending end 2 is the sending end to be decoded besides the sending end 3, based on this, the receiving end estimates the received signal of the sending end 3 after the channel is experienced, obtains the received signal of the sending end 3, and removes the received signal of the sending end 3 in the first OTFS symbol 2, so as to obtain the OTFS symbol 3. The receiving end continues to perform channel decoding on the sending end 2 according to the OTFS symbol 3 to obtain a channel decoding result of the sending end 2. If the receiving end judges that the channel decoding result passes the verification and the receiving end determines that no transmitting end except the transmitting end 2 has the decoding end, the method is finished.

Illustratively, assume that there are 3 transmitting ends, respectively, transmitting end 1, transmitting end 2, and transmitting end 3, whose channel decoding order is transmitting end 1 → transmitting end 2 → transmitting end 3 → transmitting end 1. The receiving end firstly carries out channel decoding on the sending end 1 according to the OTFS symbol 1 to obtain a channel decoding result. If the receiving end judges that the channel decoding result passes the verification, and the receiving end determines that the sending end 2 and the sending end 3 are both the sending ends to be decoded besides the sending end 1, based on this, the receiving end estimates the received signal of the sending end 1 after the channel is experienced, obtains the received signal of the sending end 1, and removes the received signal of the sending end 1 in the first OTFS symbol 1, so as to obtain the OTFS symbol 2. The receiving end continues to perform channel decoding on the sending end 2 according to the OTFS symbol 2 to obtain a channel decoding result of the sending end 2. If the receiving end judges that the channel decoding result does not pass the verification, and the receiving end determines that the sending end 3 is the sending end to be decoded besides the sending end 2, the receiving end continues to perform channel decoding on the sending end 3 according to the OTFS symbol 2 to obtain the channel decoding result of the sending end 3. If the receiving end judges that the channel decoding result of the sending end 3 does not pass the check, and the receiving end determines that the sending end 2 except the sending end 3 decodes and does not pass the check, the sending end 2 adopts the OTFS symbol 2 in the last decoding, and if the sending end 2 still adopts the OTFS symbol 2 in the current decoding, the sending end 2 does not need to be decoded.

In summary, in the present application, the receiving end may perform channel estimation and decoding by using the iterative interference cancellation method, where the interference cancellation method directly cancels interference generated by a certain transmitting end or interference generated by multiple transmitting ends, instead of performing balanced consideration on multi-user interference, so as to cancel balanced interference.

As described above, the receiving end may perform channel estimation and decoding in an iterative interference cancellation manner, and further, the receiving end may first remove interference caused by the transmitting end with the strongest interference immunity, then remove interference caused by the transmitting end with the second strongest interference immunity, and so on, and finally remove interference caused by the transmitting end with the weakest interference immunity, which may specifically adopt the following optional manners, but is not limited thereto:

optionally, each delay-doppler region comprises an edge region and a non-edge region in the delay-shift dimension. The set formed by the plurality of sending ends comprises a first sending end set and a second sending end set, the average signal power deviation of each sending end in the first sending end set is larger than the average signal power deviation of each sending end in the second sending end set, and for each sending end in the first sending end set and the second sending end set, the average signal power deviation of the sending end is the deviation between the average signal power of the modulation symbols on the edge area of the delay Doppler area corresponding to the sending end and the average signal power of the modulation symbols on the non-edge area of the delay Doppler area corresponding to the sending end.

Optionally, 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.

Optionally, the edge region comprises: a resource granule on at least one displacement in the time-lapse displacement dimension. For example: fig. 4 is a schematic diagram of an edge area provided in the embodiment of the present application, as shown in fig. 4, for a kth transmitting end, the edge areas of a delay-doppler area corresponding to the kth transmitting end are areas in column 8 and column 14, where the edge areas include: a resource particle on one displacement. Fig. 5 is another schematic diagram of an edge area provided in the embodiment of the present application, as shown in fig. 5, for a kth transmitting end, an edge area of a delay-doppler area corresponding to the kth transmitting end is an area in

columns

8 and 9 and

columns

13 and 14, where the edge area includes: resource granules at 2 shifts.

Optionally, the channel decoding order is a cyclic order from the first sending end set to the second sending end set, and from the second sending end set to the first sending end. The cyclic sequence in the first sending end set may be in a sequence from small to large according to the index corresponding to the sending end, and the cyclic sequence in the second sending end set may also be in a sequence from small to large according to the index corresponding to the sending end. For example: the plurality of sending terminals all correspond to a unique index, and the first sending terminal set comprises sending terminals with odd indexes, namely 1, 3, 5 and the like. The second set of transmitters includes corresponding transmitters with even indices, i.e., 0, 2, 4, 6, etc. And the channel decoding order is 0 → 2 → 4 → 6 → 1 → 3 → 5 → 0, and so on. Alternatively, the second set of transmitting ends includes corresponding transmitting ends with odd indexes, i.e. 1, 3, 5, etc. The first sending end set comprises corresponding sending ends with even indexes, namely 2, 4, 6 and the like. And the channel decoding order is 1 → 3 → 5 → 0 → 2 → 4 → 6 → 1, and so on.

Optionally, at least one pair of transmission ends in the first transmission end set and the second transmission end set occupy delay doppler regions that are adjacent to each other, and the at least one pair of transmission ends belong to the first transmission end set and the second transmission end set respectively. For example: the delay doppler areas corresponding to the plurality of sending terminals are distributed in sequence from small to large according to the index, that is, the distribution sequence of the delay doppler areas corresponding to the plurality of sending terminals is as follows: 0 → 1 → 2 → 3 → 4 → 5 → 6. Based on this, the indexes corresponding to each sending end in the first sending end set are even numbers, the indexes corresponding to each sending end in the second sending end set are odd numbers, and the delay doppler areas of the multiple sending ends are distributed in sequence from small to large according to the index sequence. Or the indexes corresponding to each sending end in the first sending end set are odd numbers, the indexes corresponding to each sending end in the second sending end set are even numbers, and the delay Doppler areas of the multiple sending ends are distributed in sequence from small to large according to the index sequence.

Optionally, the average signal power deviation of each transmitting end in the first transmitting end set is greater than 0, and the average signal power deviation of each transmitting end in the second transmitting end set is less than or equal to 0. That is, the average signal power deviation of each transmitting end in the first transmitting end set is larger than the average signal power deviation of each transmitting end in the second transmitting end set.

Optionally, the average signal power deviation of each transmitting end in the first set of transmitting ends is equal to 0, and the average signal power deviation of each transmitting end in the second set of transmitting ends is less than 0. That is, the average signal power deviation of each transmitting end in the first transmitting end set is greater than the average signal power deviation of each transmitting end in the second transmitting end set.

In summary, in the present application, when the receiving end performs channel estimation and decoding in an iterative interference cancellation manner, the receiving end may first remove interference caused by the transmitting end with the strongest interference immunity, then remove interference caused by the transmitting end with the second strongest interference immunity, and so on, and finally remove interference caused by the transmitting end with the weakest interference immunity, so that not only interference may be more thoroughly eliminated, but also the interference is eliminated in the order from strong to weak interference immunity, so that the efficiency of eliminating interference is higher.

The foregoing embodiment mainly introduces an iterative interference cancellation manner adopted by the receiving end, and an OTFS symbol in the transmitting end side manner is introduced as follows:

it should be understood that the second sending end may send a third OTFS symbol to the receiving end; the second transmitting end may be any one of the transmitting ends. A third delay doppler region of the third OTFS symbol carries a modulation symbol and a pilot symbol of the second transmitting end, the third delay doppler region includes an edge region and a non-edge region in a delay displacement dimension, and an average signal power of the modulation symbol in the edge region is higher or lower than an average signal power of the modulation symbol in the non-edge region.

For example: as shown in fig. 4 and 5, for the kth transmitting end, the third delay-doppler region is formed by N _τk ×N _ν And D in a third time delay Doppler region corresponding to the sending end represents the resource particle where the modulation symbol is located, S represents the resource particle where the pilot symbol is located, and other resource particles are all set to be 0. As shown in fig. 4, for the kth transmitting end, the edge regions of the corresponding third delay doppler region are the regions of the 8 th column and the 14 th column. The average signal power of the modulation symbols on the edge area is higher or lower than the average signal power of the modulation symbols on the non-edge area. As shown in fig. 5, for the kth transmitting end, the edge areas of the corresponding third delay doppler area are the areas of the 8 th and 9 th columns and the 13 th and 14 th columns. The average signal power of the modulation symbols on the edge area is higher or lower than the average signal power of the modulation symbols on the non-edge area.

It should be understood that, for the second transmitting end, it needs to convert the third OTFS symbol into a symbol on the time-frequency domain before transmitting the third OTFS symbol. Specifically, in the OTFS system, a modulation symbol and a pilot symbol of a second transmitting end are placed on a resource particle in a delay-doppler region to form a third OTFS symbol in the delay-doppler region, and then the third OTFS symbol is subjected to a symplectic Fourier Transform (sympleic Fourier Transform) to a time-frequency domain to form a time-frequency domain signal formed by the time-frequency domain particles, as shown in expression (1).

Wherein, x [ k, l]Is the coordinate of the third OTFS symbol in the dimension of time delay displacement is k, in the Doppler positionComplex value on resource particle of delay-Doppler region with coordinate l in shift dimension, X [ n, m ]]Is a complex value on the time-frequency domain resource particles with the coordinate of n in the time domain dimension and the coordinate of m in the frequency domain dimension after the third OTFS symbol is converted into the time-frequency domain, and the granularity of one resource particle in the delay-Doppler region is

Where Δ f represents the frequency domain granularity in the time-frequency domain, and Δ t represents the time domain granularity in the time-frequency domain.

The third OTFS symbol comprises N _f ×N _t The third OTFS symbol is processed by the sine Fourier transform to form N _t ×N _f A time-frequency domain resource granule, N in the time domain dimension _t An Orthogonal Frequency Division Multiplexing (OFDM) symbol having a Frequency dimension of N _f And (4) sub-carriers.

To sum up, in the present application, the average signal power on the resource particle at the edge of the delay dimension placed by the sending end is higher than or lower than the average signal power on other resource particles in the delay doppler region occupied by the sending end. By the power non-uniform distribution technology, the receiving end can preferentially demodulate the transmitting end with the strongest interference resistance according to the technology.

Method embodiments of the present application are described in detail above with reference to fig. 2-5, and apparatus embodiments of the present application are described in detail below with reference to fig. 6-10, it being understood that apparatus embodiments correspond to method embodiments and that similar descriptions may be made to method embodiments.

Fig. 6 shows a schematic block diagram of a receiving end 600 according to an embodiment of the present application. As shown in fig. 6, the receiving end includes:

a communication unit 610, configured to receive a first OTFS symbol, where the first OTFS symbol is multiplexed by multiple sending ends, multiple delay doppler regions of the first OTFS symbol respectively bear modulation symbols and pilot symbols of the multiple sending ends, the multiple delay doppler regions correspond to the multiple sending ends one to one, and the multiple delay doppler regions do not overlap.

A processing unit 620, configured to take a first to-be-decoded sending end of the multiple sending ends as a first sending end according to a channel decoding order of the multiple sending ends, and execute the following steps:

s1: and carrying out channel decoding on the first sending end according to the first OTFS symbol to obtain a channel decoding result.

S2: and judging whether the channel decoding result passes the verification, if so, executing S3, otherwise, executing the step S5.

S3: and judging whether a transmitting end to be decoded exists in the plurality of transmitting ends except the first transmitting end. If yes, executing S4, otherwise, ending.

S4: estimating a received signal of the first sending end after the first sending end passes through the channel to obtain a first received signal, and removing the first received signal in the first OTFS symbol to obtain a second OTFS symbol. And according to the channel decoding sequence, taking the first sending end to be decoded after the first sending end as a new first sending end, taking the second OTFS symbol as a new first OTFS symbol, and executing S1.

S5: and judging whether a transmitting end to be decoded exists in the plurality of transmitting ends except the first transmitting end. And if so, taking the first sending end to be decoded after the first sending end as a new first sending end according to the channel decoding sequence, and executing S1, otherwise, ending.

Optionally, the channel decoding order is a cyclic order from the first sending end set to the second sending end set, and from the second sending end set to the first sending end.

Optionally, at least one pair of transmission ends in the first transmission end set and the second transmission end set occupy delay doppler regions that are adjacent to each other, and the at least one pair of transmission ends belong to the first transmission end set and the second transmission end set respectively.

Optionally, indexes corresponding to all the transmitting ends in the first transmitting end set are even numbers, indexes corresponding to all the transmitting ends in the second transmitting end set are odd numbers, and delay doppler areas of the multiple transmitting ends are distributed in sequence from small to large according to an index sequence.

Optionally, the indexes corresponding to each sending end in the first sending end set are all odd numbers, the indexes corresponding to each sending end in the second sending end set are all even numbers, and the delay doppler areas of the multiple sending ends are distributed in sequence from small to large according to the index sequence.

Optionally, the average signal power deviation of each transmitting end in the first transmitting end set is greater than 0, and the average signal power deviation of each transmitting end in the second transmitting end set is less than or equal to 0.

Optionally, the average signal power deviation of each transmitting end in the first set of transmitting ends is equal to 0, and the average signal power deviation of each transmitting end in the second set of transmitting ends is less than 0.

Optionally, the edge region comprises: a resource granule on at least one displacement in the time-lapse displacement dimension.

Optionally, the first sending end corresponds to a first delay-doppler region in the first OTFS symbol. Correspondingly, the processing unit 620 is specifically configured to: and performing channel estimation according to the pilot signal in the first time delay Doppler region to obtain a channel estimation result. And determining a second delay Doppler area after the first delay Doppler area carries out channel delay diffusion and delay displacement according to the channel estimation result. And demodulating the first sending end in the second time delay Doppler area to obtain a demodulation result. And carrying out channel decoding according to the demodulation result to obtain a channel decoding result.

Optionally, in some embodiments, the communication unit may be a communication interface or a transceiver, or an input/output interface of a communication chip or a system on a chip. The processing unit may be one or more processors.

It should be understood that the receiving end 600 according to the embodiment of the present application may correspond to the receiving end in the above method embodiment, and the above and other operations and/or functions of each unit in the receiving end 600 are respectively for implementing corresponding processes corresponding to the receiving end in the above method embodiment, and for brevity, are not described again here.

Fig. 7 shows a schematic block diagram of a transmitting end 700 according to an embodiment of the present application. The transmitting end is a second transmitting end, as shown in fig. 7, the transmitting end includes:

a communication unit 710 for transmitting the third OTFS symbol. The third delay doppler region of the third OTFS symbol carries a modulation symbol and a pilot symbol of the second transmitting end, the third delay doppler region includes an edge region and a non-edge region in a delay displacement dimension, and an average signal power of the modulation symbol in the edge region is higher or lower than an average signal power of the modulation symbol in the non-edge region.

Optionally, the edge region comprises: the time delay shifts the resource granules on at least one shift in the dimension.

Optionally, in some embodiments, the communication unit may be a communication interface or a transceiver, or an input/output interface of a communication chip or a system on a chip.

It should be understood that the transmitting end 700 according to the embodiment of the present application may correspond to the transmitting end in the foregoing method embodiment, and the foregoing and other operations and/or functions of each unit in the transmitting end 700 are respectively for implementing corresponding flows corresponding to the transmitting end in the foregoing method embodiment, and for brevity, are not described again here.

Fig. 8 is a schematic structural diagram of a communication device 800 according to an embodiment of the present application. The communication device 800 shown in fig. 8 comprises a processor 810, and the processor 810 can call and run a computer program from a memory to implement the method in the embodiment of the present application.

Optionally, as shown in fig. 8, the communication device 800 may also include a memory 820. From the memory 820, the processor 810 can call and run a computer program to implement the method in the embodiment of the present application.

The memory 820 may be a separate device from the processor 810 or may be integrated into the processor 810.

Optionally, as shown in fig. 8, the communication device 800 may further include a transceiver 830, and the processor 810 may control the transceiver 830 to communicate with other devices, and specifically, may transmit information or data to the other devices or receive information or data transmitted by the other devices.

Optionally, the communication device 800 may specifically be a receiving end in the embodiment of the present application, and the communication device 800 may implement a corresponding process implemented by the receiving end in each method in the embodiment of the present application, which is not described herein again for brevity.

Optionally, the communication device 800 may specifically be a sending end in the embodiment of the present application, and the communication device 800 may implement a corresponding process implemented by the sending end in each method in the embodiment of the present application, which is not described herein again for brevity.

Fig. 9 is a schematic structural view of an apparatus of 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 to implement the method in the embodiment of the present application.

Optionally, as shown in fig. 9, the apparatus 900 may further include a memory 920. From the memory 920, the processor 910 can call and run a computer program to implement the method in the embodiment of the present application.

The memory 920 may be a separate device from the processor 910, or may be integrated in the processor 910.

Optionally, the apparatus 900 may further comprise an input interface 930. The processor 910 may control the input interface 930 to communicate with other devices or chips, and in particular, may obtain information or data transmitted by other devices or chips.

Optionally, the apparatus 900 may further comprise an output interface 940. The processor 910 can control the output interface 940 to communicate with other devices or chips, and in particular, can output information or data to other devices or chips.

Optionally, the apparatus may be applied to a receiving end in the embodiment of the present application, and the apparatus may implement a corresponding process implemented by the receiving end in each method in the embodiment of the present application, and for brevity, details are not described here again.

Optionally, the apparatus may be applied to the sending end in the embodiment of the present application, and the apparatus may implement the corresponding process implemented by the sending end in each method in the embodiment of the present application, and for brevity, details are not described here again.

Alternatively, the device mentioned in the embodiments of the present application may also be a chip. For example, it may be a system-on-chip, a system-on-chip or a system-on-chip, etc.

Fig. 10 is a schematic block diagram of a communication system 1000 provided in 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 may be configured to implement corresponding functions implemented by the receiving end in the foregoing method, and the sending end 1020 may be configured to implement corresponding functions implemented by the sending end in the foregoing method, which is not described herein again for brevity.

It should be understood that the processor of the embodiments of the present application may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method embodiments may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The Processor may be a general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off the shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software modules may be located in ram, flash, rom, prom, or eprom, registers, etc. as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor.

It will be appreciated that the memory in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of example, but not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), dynamic Random Access Memory (DRAM), synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), double Data Rate Synchronous Dynamic random access memory (DDR SDRAM), enhanced Synchronous SDRAM (ESDRAM), synchronous link SDRAM (SLDRAM), and Direct Rambus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

It should be understood that the above memories are exemplary but not limiting illustrations, for example, the memories in the embodiments of the present application may also be Static Random Access Memory (SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous Dynamic Random Access Memory (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (enhanced SDRAM, ESDRAM), synchronous Link DRAM (SLDRAM), direct Rambus RAM (DR RAM), and the like. That is, the memory in the embodiments of the present application is intended to comprise, without being limited to, these and any other suitable types of memory.

The embodiment of the application also provides a computer readable storage medium for storing the computer program.

Optionally, the computer-readable storage medium may be applied to the network device or the base station in the embodiment of the present application, and the computer program enables the computer to execute the corresponding process implemented by the network device or the base station in each method in the embodiment of the present application, which is not described herein again for brevity.

Optionally, the computer-readable storage medium may be applied to the mobile terminal/terminal device in the embodiment of the present application, and the computer program enables the computer to execute the corresponding process implemented by the mobile terminal/terminal device in each method in the embodiment of the present application, which is not described herein again for brevity.

Embodiments of the present application also provide a computer program product comprising computer program instructions.

Optionally, the computer program product may be applied to a network device or a base station in the embodiment of the present application, and the computer program instruction causes a computer to execute a corresponding process implemented by the network device or the base station in each method of the embodiment of the present application, which is not described herein again for brevity.

Optionally, the computer program product may be applied to the mobile terminal/terminal device in the embodiment of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the mobile terminal/terminal device in the methods in the embodiment of the present application, which are not described herein again for brevity.

The embodiment of the application also provides a computer program.

Optionally, the computer program may be applied to the network device or the base station in the embodiment of the present application, and when the computer program runs on a computer, the computer is enabled to execute a corresponding process implemented by the network device or the base station in each method in the embodiment of the present application, which is not described herein again for brevity.

Optionally, the computer program may be applied to the mobile terminal/terminal device in the embodiment of the present application, and when the computer program runs on a computer, the computer is enabled to execute the corresponding process implemented by the mobile terminal/terminal device in each method in the embodiment of the present application, which is not described herein again for brevity.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. With regard to such understanding, the technical solutions of the present application may be essentially implemented or contributed to by the prior art, or may be implemented in a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

A method of wireless communication, comprising:

a receiving end receives a first orthogonal time-frequency space OTFS symbol, the first OTFS symbol is multiplexed by a plurality of sending ends, a plurality of delay Doppler areas of the first OTFS symbol respectively bear modulation symbols and pilot symbols of the plurality of sending ends, the plurality of delay Doppler areas are in one-to-one correspondence with the plurality of sending ends, and the plurality of delay Doppler areas are not overlapped;

the receiving end takes a first sending end to be decoded in the plurality of sending ends as a first sending end according to the channel decoding sequence of the plurality of sending ends, and executes the following steps:

s1: the receiving end carries out channel decoding on the first sending end according to the first OTFS symbol to obtain a channel decoding result;

s2: the receiving end judges whether the channel decoding result passes the verification, if the channel decoding result passes the verification, S3 is executed, otherwise, the step S5 is executed;

s3: the receiving end judges whether a transmitting end to be decoded exists in the plurality of transmitting ends except the first transmitting end; if yes, executing S4, otherwise, ending;

s4: the receiving end estimates a receiving signal of the first sending end after the first sending end passes through a channel to obtain a first receiving signal, and removes the first receiving signal in the first OTFS symbol to obtain a second OTFS symbol; according to the channel decoding sequence, taking a first sending end to be decoded after the first sending end as a new first sending end, taking the second OTFS symbol as a new first OTFS symbol, and executing S1;

s5: the receiving end judges whether a transmitting end to be decoded exists in the plurality of transmitting ends except the first transmitting end; and if so, taking the first sending end to be decoded after the first sending end as a new first sending end according to the channel decoding sequence, and executing S1, otherwise, ending.
The method of claim 1, wherein each of the delay-doppler regions comprises an edge region and a non-edge region in a delay-shift dimension;

the set formed by the plurality of sending ends comprises a first sending end set and a second sending end set, the average signal power deviation of each sending end in the first sending end set is larger than the average signal power deviation of each sending end in the second sending end set, and for each sending end in the first sending end set and the second sending end set, the average signal power deviation of the sending end is the deviation between the average signal power of the modulation symbols on the edge area of the delay-doppler area corresponding to the sending end and the average signal power of the modulation symbols on the non-edge area of the delay-doppler area corresponding to the sending end.
The method of claim 2, wherein the channel decoding order is a cyclic order from the first sender side set to the second sender side set, and from the second sender side set to the first sender side.
The method of claim 2 or 3, wherein at least one pair of transmitters occupies a delay-doppler region that is adjacent to each other in the first transmitter set and the second transmitter set, and the at least one pair of transmitters belongs to the first transmitter set and the second transmitter set respectively.
The method according to claim 4, wherein indexes corresponding to each transmitting end in the first transmitting end set are even numbers, indexes corresponding to each transmitting end in the second transmitting end set are odd numbers, and delay doppler regions of the plurality of transmitting ends are distributed in sequence from small to large according to an index sequence.
The method according to claim 4, wherein indexes corresponding to each transmitting end in the first transmitting end set are odd numbers, indexes corresponding to each transmitting end in the second transmitting end set are even numbers, and delay doppler regions of the plurality of transmitting ends are distributed in sequence from small to large according to an index sequence.
The method of any of claims 2-6, wherein an average signal power deviation for each transmitter in the first set of transmitters is greater than 0, and wherein an average signal power deviation for each transmitter in the second set of transmitters is less than or equal to 0.
The method of any of claims 2-6, wherein an average signal power deviation for each transmitter in the first set of transmitters is equal to 0, and wherein an average signal power deviation for each transmitter in the second set of transmitters is less than 0.
The method according to any one of claims 2-8, wherein the edge region comprises: a resource granule on at least one displacement in the time-delay displacement dimension.
The method according to any of claims 1-9, wherein the first sending end corresponds to a first delay-doppler region in the first OTFS symbol; correspondingly, the receiving end performs channel decoding on the first sending end according to the first OTFS symbol to obtain a channel decoding result, including:

the receiving end carries out channel estimation according to the pilot signal in the first time delay Doppler area to obtain a channel estimation result;

the receiving end determines a second time delay Doppler area after the first time delay Doppler area carries out channel time delay diffusion and time delay displacement according to the channel estimation result;

the receiving end demodulates the first sending end in the second time delay Doppler area to obtain a demodulation result;

and the receiving end carries out channel decoding according to the demodulation result to obtain the channel decoding result.
A method of wireless communication, comprising:

the second sending end sends a third OTFS symbol;

and a third delay doppler region of the third OTFS symbol carries the modulation symbol and the pilot symbol of the second transmitting end, where the third delay doppler region includes an edge region and a non-edge region in a delay displacement dimension, and an average signal power of the modulation symbol in the edge region is higher or lower than an average signal power of the modulation symbol in the non-edge region.
The method of claim 11, wherein the edge region comprises: the time delay shifts the resource granules on at least one shift in the dimension.
A receiving end, comprising:

a communication unit, configured to receive a first OTFS symbol, where the first OTFS symbol is multiplexed by multiple sending ends, multiple delay doppler areas of the first OTFS symbol respectively carry modulation symbols and pilot symbols of the multiple sending ends, the multiple delay doppler areas correspond to the multiple sending ends one to one, and the multiple delay doppler areas do not overlap;

a processing unit, configured to use a first to-be-decoded sending end of the multiple sending ends as a first sending end according to a channel decoding order of the multiple sending ends, and execute the following steps:

s1: performing channel decoding on the first sending end according to the first OTFS symbol to obtain a channel decoding result;

s2: judging whether the channel decoding result passes the verification, if so, executing S3, otherwise, executing the step S5;

s3: judging whether a transmitting end to be decoded exists in the plurality of transmitting ends except the first transmitting end; if yes, executing S4, otherwise, ending;

s4: estimating a received signal after the first sending end passes through a channel to obtain a first received signal, and removing the first received signal in the first OTFS symbol to obtain a second OTFS symbol; according to the channel decoding sequence, taking a first sending end to be decoded after the first sending end as a new first sending end, taking the second OTFS symbol as a new first OTFS symbol, and executing S1;

s5: judging whether a transmitting end to be decoded exists in the plurality of transmitting ends except the first transmitting end; and if so, taking the first sending end to be decoded after the first sending end as a new first sending end according to the channel decoding sequence, and executing S1, otherwise, ending.
The receiving end of claim 13, wherein each of the delay-doppler regions comprises an edge region and a non-edge region in a delay-shift dimension;

the set formed by the plurality of sending ends comprises a first sending end set and a second sending end set, the average signal power deviation of each sending end in the first sending end set is larger than the average signal power deviation of each sending end in the second sending end set, and for each sending end in the first sending end set and the second sending end set, the average signal power deviation of the sending end is the deviation between the average signal power of the modulation symbols on the edge area of the delay-doppler area corresponding to the sending end and the average signal power of the modulation symbols on the non-edge area of the delay-doppler area corresponding to the sending end.
The receiving end according to claim 14, wherein the channel decoding order is a cyclic order from the first transmitting end to the second transmitting end, and from the second transmitting end to the first transmitting end.
The receiving end according to claim 14 or 15, wherein delay doppler areas occupied by at least one pair of transmitting ends in the first transmitting end set and the second transmitting end set are adjacent, and the at least one pair of transmitting ends belong to the first transmitting end set and the second transmitting end set respectively.
The receiving end according to claim 16, wherein indexes corresponding to each transmitting end in the first transmitting end set are even numbers, indexes corresponding to each transmitting end in the second transmitting end set are odd numbers, and delay doppler regions of the plurality of transmitting ends are distributed in order from small to large according to an index order.
The receiving end according to claim 16, wherein indexes corresponding to each transmitting end in the first transmitting end set are odd numbers, indexes corresponding to each transmitting end in the second transmitting end set are even numbers, and delay doppler regions of the plurality of transmitting ends are distributed in order from small to large according to an index order.
The receiving end of any of claims 14-18, wherein an average signal power deviation for each of the first set of transmitting ends is greater than 0, and an average signal power deviation for each of the second set of transmitting ends is less than or equal to 0.
The receiving end according to any of claims 14-18, wherein an average signal power offset of each transmitter in the first set of transmitters is equal to 0, and an average signal power offset of each transmitter in the second set of transmitters is less than 0.
The receiving end according to any of claims 14-20, wherein the edge region comprises: a resource granule on at least one displacement in the time-lapse displacement dimension.
The receiving end according to any one of claims 13-21, wherein the first sending end corresponds to a first delay-doppler region in the first OTFS symbol; correspondingly, the processing unit is specifically configured to:

performing channel estimation according to the pilot signal in the first time delay Doppler region to obtain a channel estimation result;

determining a second time delay Doppler area after the first time delay Doppler area carries out channel time delay diffusion and time delay displacement according to the channel estimation result;

demodulating the first sending end in the second time delay Doppler area to obtain a demodulation result;

and carrying out channel decoding according to the demodulation result to obtain the channel decoding result.
A kind of sending end, the said sending end is the second sending end, characterized by that, comprising:

a communication unit, configured to send a third OTFS symbol;

and a third delay doppler region of the third OTFS symbol carries the modulation symbol and the pilot symbol of the second transmitting end, where the third delay doppler region includes an edge region and a non-edge region in a delay displacement dimension, and an average signal power of the modulation symbol in the edge region is higher or lower than an average signal power of the modulation symbol in the non-edge region.
A transmitting end according to claim 23, characterised in that said edge zone comprises: a resource granule on at least one displacement in the time-lapse displacement dimension.
A receiving end, comprising: a processor and a memory for storing a computer program, the processor being configured to invoke and execute the computer program stored in the memory to perform the method of any of claims 1 to 10.
A transmitting end, comprising: a processor and a memory for storing a computer program, the processor being adapted to invoke and execute the computer program stored in the memory to perform the method of claim 11 or 12.
A chip, comprising: a processor for calling and running a computer program from a memory so that a device on which the chip is installed performs the method of any one of claims 1 to 10.
A chip, comprising: a processor for calling and running a computer program from a memory so that a device in which the chip is installed performs the method of claim 11 or 12.
A computer-readable storage medium for storing a computer program which causes a computer to perform the method of any one of claims 1 to 10.
A computer-readable storage medium for storing a computer program which causes a computer to perform the method of claim 11 or 12.
A computer program product comprising computer program instructions for causing a computer to perform the method of any one of claims 1 to 10.
A computer program product comprising computer program instructions for causing a computer to perform the method of claim 11 or 12.
A computer program, characterized in that the computer program causes a computer to perform the method according to any of claims 1-10.
A computer program, characterized in that the computer program causes a computer to perform the method according to claim 11 or 12.