WO2023130332A1 - 多用户正交频分复用ofdm子载波分配方法及其装置 - Google Patents

多用户正交频分复用ofdm子载波分配方法及其装置 Download PDF

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Publication number
WO2023130332A1
WO2023130332A1 PCT/CN2022/070597 CN2022070597W WO2023130332A1 WO 2023130332 A1 WO2023130332 A1 WO 2023130332A1 CN 2022070597 W CN2022070597 W CN 2022070597W WO 2023130332 A1 WO2023130332 A1 WO 2023130332A1
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Prior art keywords
subcarrier
pseudo
user
ofdm
configuration information
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PCT/CN2022/070597
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English (en)
French (fr)
Inventor
张振宇
赵群
吴昱民
池连刚
胡苏�
黄驿轩
叶启彬
胡泽林
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北京小米移动软件有限公司
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Application filed by 北京小米移动软件有限公司 filed Critical 北京小米移动软件有限公司
Priority to CN202280000043.2A priority Critical patent/CN116724656A/zh
Priority to PCT/CN2022/070597 priority patent/WO2023130332A1/zh
Publication of WO2023130332A1 publication Critical patent/WO2023130332A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA

Definitions

  • the present disclosure relates to the field of communication technology, and in particular to a multi-user Orthogonal Frequency Division Multiplexing OFDM subcarrier allocation method, device, communication device and storage medium.
  • the communication-radar integrated system usually adopts a single platform to realize the two functions of communication transmission and radar echo processing at the same time, but usually only considers the scenario of a single user (that is, the data receiving end of a single communication-radar integrated system).
  • the scenario of a single user that is, the data receiving end of a single communication-radar integrated system.
  • the detection performance of the integrated communication radar system is poor.
  • Embodiments of the present disclosure provide a multi-user orthogonal frequency division multiplexing OFDM subcarrier allocation method, device, communication device, and storage medium.
  • constructing a pseudo-random sequence multiple subcarriers are randomly allocated to multiple users, reducing the number of different users. Signal correlation, thereby improving the detection performance of the communication radar integrated system.
  • an embodiment of the present disclosure provides a method for allocating multi-user OFDM subcarriers, the method is executed by a data transmitting end, and the method includes: determining a pseudo-random allocation mode of multi-user OFDM subcarriers according to configuration information.
  • the subcarrier pseudo-random allocation method of multi-user OFDM can be determined according to the configuration information, so that multiple subcarriers can be randomly allocated to users, reducing the correlation of different user signals, thereby improving the detection of the integrated communication radar system performance.
  • the method further includes: determining the configuration information according to the number of OFDM subcarriers and the number of users.
  • the configuration information includes at least the position index of the subcarrier allocated by each user; the determining the configuration information according to the number of OFDM subcarriers and the number of users includes: according to the number of OFDM subcarriers , using a quadratic polynomial to replace the QPP interleaver, the QPP interleaver outputs a pseudo-random sequence; according to the pseudo-random sequence and the number of users, determine the position index of the subcarrier allocated to each user.
  • the formula of the QPP interleaver is as follows:
  • the determining the position index of the subcarrier allocated to each user according to the pseudo-random sequence and the number of users includes:
  • the N numerical values in the pseudo-random sequence are sequentially divided into K groups, and the numerical values in each group are position indexes of subcarriers allocated for corresponding users;
  • the number N of OFDM subcarriers can be divisible by the number K of users, and the number of values contained in each of the K groups is the same;
  • the number N of OFDM subcarriers is not divisible by the number of users K, the number of numerical values contained in the first a group of the K groups is the same, and the number of numerical values contained in each of the other groups is The same, and the number of numerical values contained in each of the previous a groups is 1 more than the number of numerical values contained in each of the other groups, wherein the a is the number of OFDM subcarriers N pairs The modulo value of the number of users K above.
  • a pseudo-random sequence can be generated according to the number of OFDM subcarriers, and multiple subcarriers can be randomly assigned to users, reducing the correlation of signals of different users, thereby improving the detection performance of the integrated communication radar system.
  • the configuration information is configured by a network device, or configured by a core network device, or specified by a protocol, or pre-configured.
  • the method further includes: sending the subcarrier pseudo-random allocation manner of the multi-user OFDM to a data receiving end and/or an echo signal receiving end.
  • the subcarrier pseudo-random allocation manner is associated with a specific time-frequency resource, wherein the subcarrier pseudo-random allocation manner is used on the associated time-frequency resource.
  • the subcarrier pseudo-random allocation manner used on the associated time-frequency resource is fixed; or, the subcarrier pseudo-random allocation manner used on the associated time-frequency resource varies between multiple The time domain position changes randomly within an OFDM symbol time.
  • multiple subcarriers can be randomly assigned to multiple users by using pseudo-random sequences within multiple OFDM symbol times, further reducing the correlation of different user signals, thereby further improving the integrated communication radar system detection performance.
  • the present disclosure provides a multi-user OFDM subcarrier allocation method, the method is executed by a data receiving end, and the method includes: determining pseudo-random allocation of subcarriers of the data receiving end according to configuration information.
  • the configuration information is configured by the network device, or is configured by the core network device, or is specified by the protocol, or is pre-configured, or is a subset of the multi-user OFDM sent by the data sending end.
  • Configuration information of the carrier pseudo-random allocation method is configured by the network device, or is configured by the core network device, or is specified by the protocol, or is pre-configured, or is a subset of the multi-user OFDM sent by the data sending end.
  • the configuration information includes at least position indexes of subcarriers allocated to each user.
  • multiple subcarriers can be randomly allocated to the data receiving end, reducing the correlation of different user signals, thereby improving the detection performance of the integrated communication radar system.
  • the present disclosure provides a multi-user OFDM subcarrier allocation method, the method is executed by the echo signal receiving end, and the method includes: according to the configuration information, determining the subcarrier pseudo-random allocation of the echo signal receiving end .
  • the configuration information is configured by the network device, or is configured by the core network device, or is specified by the protocol, or is pre-configured, or is a subset of the multi-user OFDM sent by the data sending end.
  • Configuration information of the carrier pseudo-random allocation method is configured by the network device, or is configured by the core network device, or is specified by the protocol, or is pre-configured, or is a subset of the multi-user OFDM sent by the data sending end.
  • the configuration information includes at least position indexes of subcarriers allocated to each user.
  • a plurality of subcarriers can be randomly assigned to the echo signal receiving end, reducing the correlation of different user signals, thereby improving the detection performance of the integrated communication radar system.
  • the present disclosure provides a multi-user OFDM subcarrier allocation device, the device is applied to a data sending end, and the device includes:
  • the first processing module is configured to determine the subcarrier pseudo-random allocation mode of multi-user OFDM according to the configuration information.
  • the apparatus further includes: a second processing module, configured to determine the configuration information according to the number of OFDM subcarriers and the number of users.
  • the configuration information includes at least the position index of the subcarrier allocated by each user; the processing module is specifically configured to: use a QPP interleaver according to the number of OFDM subcarriers, and the QPP interleaver Outputting a pseudo-random sequence; determining a position index of a subcarrier allocated to each user according to the pseudo-random sequence and the number of users.
  • the formula of the QPP interleaver is as follows:
  • the determining the position index of the subcarrier allocated to each user according to the pseudo-random sequence and the number of users includes:
  • the N numerical values in the pseudo-random sequence are sequentially divided into K groups, and the numerical values in each group are position indexes of subcarriers allocated for corresponding users;
  • the number N of OFDM subcarriers can be divisible by the number K of users, and the number of values contained in each of the K groups is the same;
  • the number N of OFDM subcarriers is not divisible by the number of users K, the number of numerical values contained in the first a group of the K groups is the same, and the number of numerical values contained in each of the other groups is The same, and the number of numerical values contained in each of the previous a groups is 1 more than the number of numerical values contained in each of the other groups, wherein the a is the number of OFDM subcarriers N pairs The modulo value of the number of users K above.
  • the configuration information is configured by a network device, or configured by a core network device, or specified by a protocol, or pre-configured.
  • the device further includes: a sending module, configured to send the subcarrier pseudo-random allocation manner of the multi-user OFDM to a data receiving end and/or an echo signal receiving end.
  • a sending module configured to send the subcarrier pseudo-random allocation manner of the multi-user OFDM to a data receiving end and/or an echo signal receiving end.
  • the subcarrier pseudo-random allocation manner is associated with a specific time-frequency resource, wherein the subcarrier pseudo-random allocation manner is used on the associated time-frequency resource.
  • the subcarrier pseudo-random allocation manner used on the associated time-frequency resource is fixed; or, the subcarrier pseudo-random allocation manner used on the associated time-frequency resource varies between multiple The time domain position changes randomly within an OFDM symbol time.
  • the present disclosure provides a method for allocating multi-user OFDM subcarriers, the device is applied to a data receiving end, and the device includes: a processing module, configured to determine the pseudo-random subcarrier of the data receiving end according to configuration information distribute.
  • the configuration information is configured by the network device, or is configured by the core network device, or is specified by the protocol, or is pre-configured, or is a subset of the multi-user OFDM sent by the data sending end.
  • Configuration information of the carrier pseudo-random allocation method is configured by the network device, or is configured by the core network device, or is specified by the protocol, or is pre-configured, or is a subset of the multi-user OFDM sent by the data sending end.
  • the configuration information includes at least position indexes of subcarriers allocated to each user.
  • the present disclosure provides a device for allocating multi-user OFDM subcarriers.
  • the device is applied to an echo signal receiving end, and the device includes: a processing module, configured to determine the frequency of the echo signal receiving end according to configuration information.
  • Subcarriers are assigned pseudo-randomly.
  • the configuration information is configured by the network device, or is configured by the core network device, or is specified by the protocol, or is pre-configured, or is a subset of the multi-user OFDM sent by the data sending end.
  • Configuration information of the carrier pseudo-random allocation method is configured by the network device, or is configured by the core network device, or is specified by the protocol, or is pre-configured, or is a subset of the multi-user OFDM sent by the data sending end.
  • the configuration information includes at least position indexes of subcarriers allocated to each user.
  • the present disclosure provides a communication device, including a processor and a memory, where a computer program is stored in the memory, and the processor executes the computer program stored in the memory, so that the terminal device executes the method described in the first paragraph.
  • a communication device including a processor and a memory, where a computer program is stored in the memory, and the processor executes the computer program stored in the memory, so that the terminal device executes the method described in the first paragraph.
  • the present disclosure provides a communication device, including a processor and a memory, where a computer program is stored in the memory, and the processor executes the computer program stored in the memory, so that the terminal device executes the above The method described in the two aspects.
  • the present disclosure provides a communication device, including a processor and a memory, where a computer program is stored in the memory, and the processor executes the computer program stored in the memory, so that the terminal device executes the above methods described in three respects.
  • the present disclosure provides a computer-readable storage medium for storing instructions, and when the instructions are executed, the method described in the first aspect is implemented.
  • the present disclosure provides a computer-readable storage medium for storing instructions, and when the instructions are executed, the method described in the second aspect is implemented.
  • the present disclosure provides a computer-readable storage medium for storing instructions, and when the instructions are executed, the method as described in the third aspect is implemented.
  • the present disclosure provides a computer program product, including a computer program, and when the computer program is executed by a processor, the steps of the method in the first aspect are implemented.
  • the present disclosure provides a computer program product, including a computer program, and when the computer program is executed by a processor, the steps of the method described in the second aspect are implemented.
  • the present disclosure provides a computer program product, including a computer program, and when the computer program is executed by a processor, the steps of the method described in the third aspect are implemented.
  • FIG. 1 is a schematic diagram of the architecture of an integrated communication and radar system provided by an embodiment of the present disclosure
  • FIG. 2 is a schematic diagram of an OFDM-based communication radar integrated system architecture provided by an embodiment of the present disclosure
  • FIG. 3 is a flowchart of a multi-user OFDM subcarrier allocation method provided by an embodiment of the present disclosure
  • FIG. 4 is a flowchart of another multi-user OFDM subcarrier allocation method provided by an embodiment of the present disclosure
  • FIG. 5 is a flowchart of another multi-user OFDM subcarrier allocation method provided by an embodiment of the present disclosure
  • Fig. 6a is a user time-frequency domain resource diagram provided by an embodiment of the present disclosure.
  • FIG. 6b is another user time-frequency domain resource diagram provided by an embodiment of the present disclosure.
  • Fig. 7a is a user radar image provided by an embodiment of the present disclosure.
  • Fig. 7b is another user radar image provided by an embodiment of the present disclosure.
  • Fig. 8 is another user radar image provided by an embodiment of the present disclosure.
  • FIG. 9 is a flowchart of another multi-user OFDM subcarrier allocation method provided by an embodiment of the present disclosure.
  • FIG. 10 is a flowchart of another multi-user OFDM subcarrier allocation method provided by an embodiment of the present disclosure.
  • FIG. 11 is a schematic structural diagram of a multi-user OFDM subcarrier allocation device provided by an embodiment of the present disclosure.
  • FIG. 12 is a schematic structural diagram of another multi-user OFDM subcarrier allocation device provided by an embodiment of the present disclosure.
  • FIG. 13 is a schematic structural diagram of another multi-user OFDM subcarrier allocation device provided by an embodiment of the present disclosure.
  • FIG. 14 is a schematic structural diagram of another multi-user OFDM subcarrier allocation device provided by an embodiment of the present disclosure.
  • FIG. 15 is a schematic structural diagram of another multi-user OFDM subcarrier allocation device provided by an embodiment of the present disclosure.
  • Fig. 16 is a schematic structural diagram of a communication device provided by an embodiment of the present disclosure.
  • FIG. 1 is a schematic structural diagram of an integrated communication and radar system provided by an embodiment of the present disclosure.
  • the communication radar integration may include but not limited to a data sending end, a data receiving end and an echo signal receiving end.
  • the number and shape of the devices shown in Figure 1 are for example only and do not constitute a limitation to the embodiments of the present disclosure. In practical applications, two or more data sending ends, two or more data receiving ends and two or more data receiving ends may be included. Two or more echo signal receiving ends.
  • the communication system shown in FIG. 1 includes a data sending end 101 , a data receiving end 102 and an echo signal receiving end 103 as an example.
  • the data sending end 101 and the echo signal receiving end 103 in the embodiment of the present disclosure are entities for transmitting or receiving signals.
  • the data sending end 101 may be an evolved base station (evolved NodeB, eNB), a transmission point (transmission reception point, TRP), a next generation base station (next generation NodeB, gNB) in the NR system, or a mobile station in other future mobile communication systems.
  • eNB evolved NodeB
  • TRP transmission reception point
  • gNB next generation base station
  • the embodiments of the present disclosure do not limit the specific technology and specific device form adopted by the data sending end.
  • the data sending end may be composed of a centralized unit (central unit, CU) and a distributed unit (distributed unit, DU), wherein the CU may also be called a control unit (control unit).
  • the structure of the DU can separate the data sending end, such as the protocol layer of the base station, and the functions of some protocol layers are placed in the CU for centralized control, and the remaining part or all of the functions of the protocol layer are distributed in the DU, and the CU centrally controls the DU.
  • the data transmitting end 101 and the echo signal receiving end 103 may also be entities of the same type as the following data receiving end 102 for receiving or transmitting signals.
  • the data receiving end 102 in the embodiment of the present disclosure is an entity on the user side for receiving or transmitting signals, such as a mobile phone.
  • the data receiving end may also be called terminal equipment (terminal), user equipment (user equipment, UE), mobile station (mobile station, MS), mobile terminal equipment (mobile terminal, MT) and so on.
  • the data receiving end can be a car with communication function, smart car, mobile phone, wearable device, tablet computer (Pad), computer with wireless transceiver function, virtual reality (virtual reality, VR) terminal equipment, augmented reality (augmented reality, AR) terminal equipment, wireless terminal equipment in industrial control (industrial control), wireless terminal equipment in self-driving (self-driving), wireless terminal equipment in remote medical surgery (remote medical surgery), smart grid Wireless terminal devices in (smart grid), wireless terminal devices in transportation safety, wireless terminal devices in smart city, wireless terminal devices in smart home, etc.
  • virtual reality virtual reality
  • AR augmented reality
  • wireless terminal equipment in industrial control industrial control
  • wireless terminal equipment in self-driving self-driving
  • remote medical surgery remote medical surgery
  • smart grid Wireless terminal devices in (smart grid), wireless terminal devices in transportation safety, wireless terminal devices in smart city, wireless terminal devices in smart home, etc.
  • the echo signal receiving end 103 in the embodiment of the present disclosure is a device for amplifying, transforming and processing the echo signal. It can be understood that the application scenarios of the integrated communication radar system can be divided into two types: active radar system and passive radar system according to the nature of the radar.
  • FIG. 2 is a schematic diagram of an architecture of an OFDM-based integrated communication and radar system provided by an embodiment of the present disclosure.
  • the data sending end transmits the bit data to be sent after a series of modulation processing, and the signal transmitted by the data sending end is received by the data receiving end after being reflected by the target, and the data receiving end demodulates the received signal, Get the original bit data sent by the data sender.
  • the echo receiving end that is, the radar processor
  • the communication function between the data sending end and the data receiving end can be realized at the same time, and the radar function of detecting the position of the moving target can be realized.
  • the data transmitter and the echo signal receiver are the same device.
  • the data sending end sends bit data to the data receiving end, and the data receiving end acts as a receiver to complete the communication function.
  • the echo signal generated by the data sending end sending bit data irradiated on the data receiving end is sent back to the echo signal receiving end (that is, the data sending end), and the echo signal receiving end uses the radar processor to carry out information such as speed and position of the data receiving end. Detection, to complete the radar function.
  • the data sending end, data receiving end and echo signal receiving end can be:
  • the data sending end and the echo signal receiving end are BS (Base Station, base station), and the data receiving end is UE;
  • the data sending end and the echo signal receiving end are UE 1, and the data receiving end is UE 2.
  • the data sending end and the echo signal receiving end are different devices, and there may be multiple echo signal receiving ends.
  • the echo signal generated by the bit data sent by the data sending end and irradiated on the data receiving end is sent back to the echo signal receiving end, and the echo signal receiving end uses the radar processor to detect information such as speed and position of the data receiving end to complete the radar function.
  • the data sending end, data receiving end and echo signal receiving end can be:
  • the data sending end is BS 1, the data receiving end is UE, and the echo signal receiving end is BS 2 or a BS set ⁇ BS 2, BS 3,..., BS n ⁇ ;
  • the data sending end is UE 1, the data receiving end is UE 2, and the echo signal receiving end is UE 3 or a set of UEs ⁇ UE 3,UE 4,...,UE k ⁇ ;
  • the data sending end is UE 1
  • the data receiving end is UE 2
  • the echo signal receiving end is BS 1 or a BS set ⁇ BS 1, BS 2,...,BS n ⁇ ;
  • the data sending end is BS
  • the data receiving end is UE 1
  • the echo signal receiving end is UE 2 or a set of UEs ⁇ UE 3,UE 4,...,UE k ⁇ .
  • both the network side and the terminal side can be used as sending sources to transmit sensing signals.
  • each user represents a data receiving end in an integrated communication and radar system.
  • the embodiments of the present disclosure do not limit the specific technologies and specific equipment forms adopted by the data sending end, the data receiving end, and the echo signal receiving end.
  • FIG. 3 is a flowchart of a multi-user OFDM subcarrier allocation method provided by an embodiment of the present disclosure. This method is executed by the data sender. As shown in Fig. 3, the multi-user OFDM subcarrier allocation method may include the following steps.
  • Step S301 determine the subcarrier pseudo-random allocation mode of multi-user OFDM.
  • the configuration information is configured by a network device, or configured by a core network device, or stipulated by a protocol, or pre-configured.
  • the subcarrier pseudo-random allocation mode of the multi-user OFDM is determined through the configuration information configured by the network device.
  • the configuration information may be sent by the network device to the data sending end through static and/or semi-static signaling.
  • the network device can send configuration information through RRC (radio resource control, radio resource control) signaling including cell specific (cell specific), UE group common (terminal group common) or UE specific (terminal specific), and the data sending end Receive RRC signaling, and determine the subcarrier allocation method according to the configuration information in the RRC signaling; or, the network device can pre-configure a group of subcarrier allocation methods, through MAC (media access control, media access control)-CE (control element , control unit) or DCI (downlink control information, downlink control information) signaling to send the configuration information to the data sender, and the data sender determines the subcarrier allocation method according to the received configuration; or, the network device can use the above methods at the same time Send the configuration information to the data sender, and after the data sender receives it, it will independently select the subcarrier allocation method according to the situation.
  • RRC radio resource control, radio resource control
  • a subcarrier pseudo-random allocation mode of the multi-user OFDM is determined.
  • the configuration information can be delivered to the data sending end by the core network equipment through static and/or semi-static signaling.
  • the core network device sends the configuration information to the data sending end through static and/or semi-static signaling, which can be implemented in any of the embodiments of the present disclosure, which is not limited by the embodiments of the present disclosure. , and will not repeat them.
  • the subcarrier pseudo-random allocation mode of the multi-user OFDM is determined through the configuration information stipulated in the protocol.
  • the configuration information corresponding to multiple subcarrier pseudo-random allocation methods of multi-user OFDM can be specified in advance through the agreement, and the data sending end can independently select the appropriate subcarrier allocation method.
  • a subcarrier pseudo-random allocation mode of the multi-user OFDM is determined.
  • configuration information corresponding to multiple subcarrier pseudo-random allocation methods of multi-user OFDM can be pre-configured, and the data sending end can independently select a suitable subcarrier allocation method.
  • the subcarrier pseudo-random allocation method of multi-user OFDM can be determined according to the configuration information, so that multiple subcarriers are randomly allocated to users, reducing the correlation of different user signals, thereby improving the integration of communication and radar System probing performance.
  • FIG. 4 is a flowchart of another multi-user OFDM subcarrier allocation method provided by an embodiment of the present disclosure.
  • the method may determine configuration information for multi-user OFDM subcarrier allocation.
  • the multi-user OFDM subcarrier allocation method may include the following steps.
  • step S401 configuration information is determined according to the number of OFDM subcarriers and the number of users.
  • the configuration information includes at least the position index of the subcarrier allocated by each user.
  • the position index of the subcarrier allocated to each user is used to indicate the frequency domain position of the subcarrier allocated to the user.
  • a QPP (quadratic polynomial permutation, quadratic polynomial permutation) interleaver can be used according to the number of OFDM subcarriers, and the QPP interleaver outputs a pseudo-random sequence; according to the pseudo-random sequence and the number of users, determine each The position index of the subcarrier allocated by the user.
  • the formula of the QPP interleaver is expressed as follows:
  • x is a sequence composed of N integers from 1 to N.
  • f(x) is obtained, and the output of f(x) is a pseudo sequence composed of N integers from 0 to N-1.
  • a random sequence the pseudo-random sequence includes position indexes of subcarriers allocated for each user.
  • the present disclosure improves the allocation method under the subcarrier continuous allocation method, and adopts a random allocation method. Since the real randomness cannot be designed in the hardware implementation, a pseudo-random sequence is introduced to randomly allocate the positions of multi-user subcarriers.
  • Theorem 1 is a factor of N. Using the above theorem, it can be judged whether a polynomial is a PP (polynomial permutation, polynomial permutation) on a modulo N, and for a quadratic polynomial on an integer ring, the following theorem can be obtained.
  • PP polynomial permutation, polynomial permutation
  • f 1 that satisfies the above inference conditions can be all positive odd numbers, and f 2 can be all positive even numbers.
  • the implementation manner of determining the position index of the subcarrier allocated by each user may be as follows: based on the number of users K, divide the N numerical values in the pseudo-random sequence into K groups sequentially, and each The numerical values in the groups are the position indexes of the subcarriers assigned to the corresponding users; wherein, the number of OFDM subcarriers N can be divisible by the number of users K, and the number of numerical values contained in each of the K groups is the same; or, the OFDM subcarriers The number N is not divisible by the number of users K.
  • the number of values contained in the first a group is the same, and the number of values contained in the other groups is the same, and each of the previous a groups contains the same number of values.
  • the number of numerical values of is 1 more than the number of numerical values contained in other groups, wherein, a is the value obtained by moduloing the number of OFDM subcarriers N to the number of users K.
  • each user can be assigned a corresponding value of x in turn according to the above formula, and according to the value of x assigned to each user and the values of N, f 1 , and f 2 The value is put into the above QPP formula to obtain the position index of the subcarrier allocated for the user.
  • the number of subcarrier position index values contained in the first 2 groups corresponding to the first 2 users that meet the conditions is greater than the number of subcarrier position indexes corresponding to the last 2 users that do not meet the conditions.
  • the number of numerical values of the position indices of the subcarriers contained in each subcarrier is 1 more than that.
  • Each of users 1, 2, 3 and 4 occupies 256 subcarriers.
  • Step S402 according to the configuration information, determine the subcarrier pseudo-random allocation mode of multi-user OFDM.
  • step S402 may be implemented in any one of the embodiments of the present disclosure, which is not limited in the embodiments of the present disclosure, and will not be repeated here.
  • a pseudo-random sequence can be generated according to the number of OFDM subcarriers, multiple subcarriers are randomly assigned to users, and the correlation of different user signals is reduced, thereby improving the detection performance of the integrated communication radar system.
  • FIG. 5 is a flow chart of another multi-user OFDM subcarrier allocation method provided by an embodiment of the present disclosure.
  • the method can send the subcarrier pseudo-random allocation to the data receiving end and/or the echo signal receiving end of the same integrated communication and radar system.
  • the multi-user OFDM subcarrier allocation method may include the following steps.
  • Step S501 determine the subcarrier pseudo-random allocation mode of multi-user OFDM.
  • step S501 may be implemented in any one of the embodiments of the present disclosure, which is not limited in the embodiments of the present disclosure, and will not be repeated here.
  • Step S502 sending the subcarrier pseudo-random allocation mode of the multi-user OFDM to the data receiving end and/or the echo signal receiving end.
  • the subcarrier allocation mode can be transmitted to the data receiving end and/or the echo signal receiving end through control signaling.
  • the subcarrier pseudo-random allocation manner is associated with a specific time-frequency resource, where the subcarrier pseudo-random allocation manner is used on the associated time-frequency resource.
  • the pseudo-random allocation method may be used to allocate subcarriers to multiple users on available frequency domain resources within a specific time.
  • the subcarrier pseudo-random allocation mode used on the associated time-frequency resource is fixed; or, when the sub-carrier pseudo-random allocation mode used on the associated time-frequency resource is within multiple OFDM symbol times The domain location changes randomly.
  • the position of each user's available subcarrier is fixed or, divide an available time resource into a plurality of OFDM symbol times, and use the pseudo-random allocation method provided by any embodiment of the present disclosure to reassign different sub
  • the carrier position changes the available subcarriers of each user in different OFDM symbol times.
  • arrows 601 and 603 and other white parts in the figure represent subcarriers occupied by user 1, and arrows 602 and 604 and other black parts in the figure represent subcarriers not occupied by user 1.
  • each The position of the subcarrier of the user is pseudo-randomly assigned using the pseudo-random sequence output by the QPP interleaver provided by the embodiment of the present disclosure. That is, on the time-frequency domain resource map, the subcarriers occupied by a single user appear as discretized point graphics.
  • Figure 8 it is a schematic diagram of the radar detection image of user 1 when the available subcarriers of each user change in different OFDM symbol times. It can be seen from the figure that the user 1 can clearly distinguish the other three users, and the detection effect is obviously better than the case where the position of the available subcarriers of each user is fixed.
  • multiple subcarriers can be randomly assigned to multiple users using pseudo-random sequences within multiple OFDM symbol times, further reducing the correlation of different user signals, thereby further improving the integration of communication and radar. Chemical system detection performance.
  • FIG. 9 is a multi-user OFDM subcarrier allocation method provided by an embodiment of the present disclosure. This method is executed by the data receiving end. As shown in Fig. 9, the multi-user OFDM subcarrier allocation method may include the following steps.
  • Step S901 according to the configuration information, determine the subcarrier pseudo-random allocation of the data receiving end.
  • the configuration information is configured by the network equipment, or is configured by the core network equipment, or is stipulated by the protocol, or is pre-configured, or is the configuration of the subcarrier pseudo-random allocation method of the multi-user OFDM sent by the data sending end information.
  • step S901 may be implemented in any one of the embodiments of the present disclosure, which is not limited in the embodiments of the present disclosure, and will not be repeated here.
  • the configuration information includes at least position indexes of subcarriers allocated to each user.
  • the data receiving end can determine the frequency-domain position of its available sub-carriers according to the position indexes of the sub-carriers in the configuration information.
  • multiple subcarriers can be randomly allocated to the data receiving end, reducing the correlation of different user signals, thereby improving the detection performance of the integrated communication radar system.
  • FIG. 10 is a flowchart of a multi-user OFDM subcarrier allocation method provided by an embodiment of the present disclosure. The method is executed by the echo signal receiving end. As shown in Fig. 10, the multi-user OFDM subcarrier allocation method may include the following steps.
  • Step S1001 according to the configuration information, determine the subcarrier pseudo-random allocation of the echo signal receiving end.
  • the configuration information is configured by the network equipment, or is configured by the core network equipment, or is stipulated by the protocol, or is pre-configured, or is the configuration of the subcarrier pseudo-random allocation method of the multi-user OFDM sent by the data sending end information.
  • step S1001 may be implemented in any one of the embodiments of the present disclosure, which is not limited in the embodiments of the present disclosure, and will not be repeated here.
  • the configuration information includes at least position indexes of subcarriers allocated to each user.
  • the echo signal receiving end can determine the frequency domain position of its available subcarrier according to the position index of the subcarrier in the configuration information.
  • multiple subcarriers can be randomly assigned to the echo signal receiving end, reducing the correlation of different user signals, thereby improving the detection performance of the integrated communication radar system.
  • FIG. 11 is a schematic diagram of a multi-user OFDM subcarrier allocation device provided by an embodiment of the present disclosure. The device can be applied to the data sending end. As shown in FIG. 11 , the multi-user OFDM subcarrier allocation apparatus includes a first processing module 1101 .
  • the first processing module 1101 is configured to: determine a subcarrier pseudo-random allocation manner of multi-user OFDM according to configuration information.
  • the multi-user OFDM subcarrier allocation apparatus may further include a second processing module 1202 .
  • the second processing module 1202 is configured to: determine configuration information according to the number of OFDM subcarriers and the number of users.
  • 1201 in FIG. 12 has the same function and structure as 1101 in FIG. 11 .
  • the configuration information includes at least the position index of the subcarrier allocated by each user; the second processing module 1202 is specifically configured to: use a QPP interleaver according to the number of OFDM subcarriers, and the QPP interleaver outputs a pseudo-random Sequence; according to the pseudo-random sequence and the number of users, determine the position index of the subcarrier allocated to each user.
  • the formula of the QPP interleaver is expressed as follows:
  • the second processing module 1201 is specific to the user: according to the pseudo-random sequence and the number of users, the implementation of determining the position index of the subcarrier allocated by each user may be as follows: based on the number of users K, the N values in the pseudo-random sequence Sequentially divided into K groups, the value in each group is the position index of the subcarrier allocated for the corresponding user; wherein, the number of OFDM subcarriers can be divisible by the number of users K, and the number of values contained in each of the K groups the same; or, the number of OFDM subcarriers N is not divisible by the number of users K, the number of numerical values contained in the first a group of K groups is the same, and the number of numerical values contained in each of the other groups is the same, and the previous The number of numerical values contained in each of the K groups is 1 more than the number of numerical values contained in other groups, wherein a is a value obtained by moduloing the number of OFDM subcarriers N to the number of users K.
  • the configuration information is configured by a network device, or configured by a core network device, or specified by a protocol, or pre-configured.
  • the multi-user OFDM subcarrier allocation apparatus may further include a sending processing module 1302 .
  • the second processing module 1302 is configured to: send the subcarrier pseudo-random allocation mode of the multi-user OFDM to the data receiving end and/or the echo signal receiving end.
  • 1301 in FIG. 13 has the same function and structure as 1101 in FIG. 11 .
  • the subcarrier pseudo-random allocation manner is associated with a specific time-frequency resource, wherein the subcarrier pseudo-random allocation manner is used on the associated time-frequency resource.
  • the subcarrier pseudo-random allocation mode used on the associated time-frequency resource is fixed; or, when the sub-carrier pseudo-random allocation mode used on the associated time-frequency resource is within multiple OFDM symbol times The domain location changes randomly.
  • FIG. 14 is another apparatus for allocating multi-user OFDM subcarriers provided by an embodiment of the present disclosure.
  • the device is applied to the data receiving end.
  • the multi-user OFDM subcarrier allocation apparatus includes: a processing module 1401 configured to determine pseudo-random subcarrier allocation at the data receiving end according to configuration information.
  • the configuration information is configured by the network device, or is configured by the core network device, or is specified by the protocol, or is pre-configured, or is the subcarrier pseudo-subcarrier of the multi-user OFDM sent by the data sending end. Configuration information of the random allocation method.
  • the configuration information includes at least position indexes of subcarriers allocated to each user.
  • FIG. 15 is another apparatus for allocating multi-user OFDM subcarriers provided by an embodiment of the present disclosure.
  • the device is applied to the echo signal receiving end.
  • the multi-user OFDM subcarrier allocation apparatus includes: a processing module 1501 configured to determine pseudo-random allocation of subcarriers at the echo signal receiving end according to configuration information.
  • the configuration information is configured by the network device, or is configured by the core network device, or is specified by the protocol, or is pre-configured, or is the subcarrier pseudo-subcarrier of the multi-user OFDM sent by the data sending end. Configuration information of the random allocation method.
  • the configuration information includes at least position indexes of subcarriers allocated to each user.
  • a plurality of subcarriers can be randomly assigned to users based on a pseudo-random sequence, reducing the correlation of signals of different users, thereby improving the detection performance of the integrated communication radar system.
  • FIG. 16 is a schematic structural diagram of a communication device 1600 provided by an embodiment of the present disclosure.
  • the communication device 1600 may be a communication device, and may also be a chip, a chip system, or a processor that supports the communication device to implement the foregoing method.
  • the communication device may be used to implement the methods described in the foregoing method embodiments, and for details, reference may be made to the descriptions in the foregoing method embodiments.
  • Communications device 1600 may include one or more processors 1601 .
  • the processor 1601 may be a general-purpose processor or a special-purpose processor. For example, it can be a baseband processor or a central processing unit.
  • the baseband processor can be used to process communication protocols and communication data
  • the central processing unit can be used to control communication devices (such as base stations, baseband chips, electronic equipment, electronic equipment chips, DU or CU, etc.) and execute computer programs , to process data for computer programs.
  • the communication device 1600 may further include one or more memories 1602, on which a computer program 1604 may be stored, and the processor 1601 executes the computer program 1604, so that the communication device 1600 executes the method described in the foregoing method embodiments. method.
  • data may also be stored in the memory 1602 .
  • the communication device 1600 and the memory 1602 can be set separately or integrated together.
  • the communication device 1600 may further include a transceiver 1605 and an antenna 1606 .
  • the transceiver 1605 may be called a transceiver unit, a transceiver, or a transceiver circuit, etc., and is used to implement a transceiver function.
  • the transceiver 1605 may include a receiver and a transmitter, and the receiver may be called a receiver or a receiving circuit for realizing a receiving function; the transmitter may be called a transmitter or a sending circuit for realizing a sending function.
  • the communication device 1600 may further include one or more interface circuits 1607 .
  • the interface circuit 1607 is used to receive code instructions and transmit them to the processor 1601 .
  • the processor 1601 runs the code instructions to enable the communication device 1600 to execute the methods described in the foregoing method embodiments.
  • the communication device 1600 is the data sending end in the foregoing method embodiments: the processor 1601 is configured to execute step S301 in FIG. 3 and step S401 in FIG. 4 .
  • the transceiver 1605 is used to execute step S501 in FIG. 5 .
  • the communication device 1600 is the data receiving end in the foregoing method embodiments: the processor 1601 is configured to execute step S901 in FIG. 9 .
  • the communication device 1600 is the echo signal receiving end in the foregoing method embodiments: the processor 1601 is configured to execute step S1001 in FIG. 10 .
  • the processor 1601 may include a transceiver for implementing receiving and sending functions.
  • the transceiver may be a transceiver circuit, or an interface, or an interface circuit.
  • the transceiver circuits, interfaces or interface circuits for realizing the functions of receiving and sending can be separated or integrated together.
  • the above-mentioned transceiver circuit, interface or interface circuit may be used for reading and writing code/data, or the above-mentioned transceiver circuit, interface or interface circuit may be used for signal transmission or transfer.
  • the processor 1601 may store a computer program 1603 , and the computer program 1603 runs on the processor 1601 to enable the communication device 1601 to execute the methods described in the foregoing method embodiments.
  • the computer program 1603 may be solidified in the processor 1601, and in this case, the processor 1601 may be implemented by hardware.
  • the communication device 1601 may include a circuit, and the circuit may implement the function of sending or receiving or communicating in the foregoing method embodiments.
  • the processors and transceivers described in this disclosure can be implemented on integrated circuits (integrated circuits, ICs), analog ICs, radio frequency integrated circuits (RFICs), mixed signal ICs, application specific integrated circuits (ASICs), printed circuit boards ( printed circuit board, PCB), electronic equipment, etc.
  • the processor and transceiver can also be fabricated using various IC process technologies such as complementary metal oxide semiconductor (CMOS), nMetal-oxide-semiconductor (NMOS), P-type Metal oxide semiconductor (positive channel metal oxide semiconductor, PMOS), bipolar junction transistor (bipolar junction transistor, BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.
  • CMOS complementary metal oxide semiconductor
  • NMOS nMetal-oxide-semiconductor
  • PMOS P-type Metal oxide semiconductor
  • BJT bipolar junction transistor
  • BiCMOS bipolar CMOS
  • SiGe silicon germanium
  • GaAs gallium arsenide
  • the communication device described in the above embodiments may be a network device or a terminal device (such as the data sending end, data receiving end, and echo signal receiving end in the foregoing method embodiments), but the scope of the communication device described in this disclosure is not It is limited thereto, and the structure of the communication device may not be limited by FIG. 11 .
  • a communication device may be a stand-alone device or may be part of a larger device.
  • the communication device may be:
  • a set of one or more ICs may also include storage components for storing data and computer programs;
  • ASIC such as modem (Modem);
  • the present disclosure also provides a readable storage medium on which instructions are stored, and when the instructions are executed by a computer, the functions of any one of the above method embodiments are realized.
  • the present disclosure also provides a computer program product, which implements the functions of any one of the above method embodiments when executed by a computer.
  • all or part of them may be implemented by software, hardware, firmware or any combination thereof.
  • software When implemented in software, it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product comprises one or more computer programs. When the computer program is loaded and executed on the computer, all or part of the processes or functions according to the embodiments of the present disclosure will be generated.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices.
  • the computer program can be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer program can be downloaded from a website, computer, server or data center Transmission to another website site, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.).
  • the computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center integrated with one or more available media.
  • the available medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a high-density digital video disc (digital video disc, DVD)), or a semiconductor medium (for example, a solid state disk (solid state disk, SSD)) etc.
  • a magnetic medium for example, a floppy disk, a hard disk, a magnetic tape
  • an optical medium for example, a high-density digital video disc (digital video disc, DVD)
  • a semiconductor medium for example, a solid state disk (solid state disk, SSD)
  • At least one in the present disclosure can also be described as one or more, and a plurality can be two, three, four or more, and the present disclosure is not limited.
  • the technical feature is distinguished by "first”, “second”, “third”, “A”, “B”, “C” and “D”, etc.
  • the technical features described in the “first”, “second”, “third”, “A”, “B”, “C” and “D” have no sequence or order of magnitude among the technical features described.
  • each table in the present disclosure may be configured or predefined.
  • the values of the information in each table are just examples, and may be configured as other values, which are not limited in the present disclosure.
  • the corresponding relationship shown in some rows may not be configured.
  • appropriate deformation adjustments can be made based on the above table, for example, splitting, merging, and so on.
  • the names of the parameters shown in the titles of the above tables may also adopt other names understandable by the communication device, and the values or representations of the parameters may also be other values or representations understandable by the communication device.
  • other data structures can also be used, for example, arrays, queues, containers, stacks, linear tables, pointers, linked lists, trees, graphs, structures, classes, heaps, hash tables or hash tables can be used wait.
  • Predefinition in the present disclosure can be understood as definition, predefinition, storage, prestorage, prenegotiation, preconfiguration, curing, or prefiring.

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Abstract

本公开实施例公开了一种多用户正交频分复用OFDM子载波分配方法及其装置，该方法由数据发送端执行，该方法包括：根据配置信息，确定多用户OFDM的子载波伪随机分配方式。本公开的技术方案，可将多个子载波随机分配给用户使用，减小不同用户信号的相关性，从而提升通信雷达一体化系统探测性能。

Description

多用户正交频分复用OFDM子载波分配方法及其装置 技术领域
本公开涉及通信技术领域，尤其涉及一种多用户正交频分复用OFDM子载波分配方法、装置、通信装置和存储介质。
背景技术
随着无线通信技术的迅速发展，通信与感知一体化技术已经作为潜在的6G关键技术而得到广泛讨论。通信雷达一体化系统通常采取单平台同时实现通信的发射及雷达回波处理两种功能，但通常只考虑单用户(即单个通信雷达一体化系统的数据接收端)的场景。在多用户场景中，当多用户采取最简单的子载波连续分配方案时，通信雷达一体化系统探测性能较差。
发明内容
本公开实施例提供一种多用户正交频分复用OFDM子载波分配方法、装置、通信装置和存储介质，通过构建伪随机序列，将多个子载波随机分配给多用户使用，减小不同用户信号的相关性，从而提升通信雷达一体化系统探测性能。
第一方面，本公开实施例提供一种多用户OFDM子载波分配方法，所述方法由数据发送端执行，所述方法包括：根据配置信息，确定多用户OFDM的子载波伪随机分配方式。
通过本技术方案，可以根据配置信息，确定多用户OFDM的子载波伪随机分配方式，从而将多个子载波随机分配给用户使用，减小不同用户信号的相关性，从而提升通信雷达一体化系统探测性能。
在一种实现方式中，所述方法还包括：根据OFDM子载波数和用户数，确定所述配置信息。
在一种可选地实现方式中，所述配置信息至少包括各用户分配的子载波的位置索引；所述根据OFDM子载波数和用户数，确定所述配置信息，包括：根据OFDM子载波数，采用二次多项式置换QPP交织器，所述QPP交织器输出伪随机序列；根据所述伪随机序列和所述用户数，确定各用户分配的子载波的位置索引。
可选地，所述QPP交织器的公式表示如下：
f(x)＝mod(f 1x+f 2x 2,N)
其中，N为所述OFDM子载波数且
Figure PCTCN2022070597-appb-000001
Γ＝{2,3,5,7,…}为质数集；f 1需满足mod(f 1,p i)>0；f 2需满足mod(f 2,p i)>0；mod为取模运算符；x为所述QPP交织器的输入序列，所述x取值为1到N的整数；对于任意一组满足条件的f 1和f 2，f(x)为所述QPP交织器输出的伪随机序列，所述f(x)取值为0到N-1的整数，即为各用户分配的子载波的位置索引。
可选地，所述根据所述伪随机序列和所述用户数，确定各用户分配的子载波的位置索引，包括：
基于所述用户数K，将所述伪随机序列中的N个数值顺序的分成K个分组，每个所述分组内的数值是为对应用户分配的子载波的位置索引；
其中，所述OFDM子载波数N可被所述用户数K整除，所述K个分组内各自所包含的数值的个数相同；
或者，所述OFDM子载波数N不可被所述用户数K整除，所述K个分组中前a个分组内各自所包含的数值的个数相同，其他分组内各自所包含的数值的个数相同，且所述前a个分组内各自所包含的数值的个数比所述其他分组内各自所包含的数值的个数多1，其中，所述a为所述OFDM子载波数N对所述用户数K取模后的值。
通过本技术方案，可根据OFDM子载波数生成伪随机序列，将多个子载波随机分配给用户使用，减小不同用户信号的相关性，从而提升通信雷达一体化系统探测性能。
在一种实现方式中，所述配置信息是由网络设备配置的，或者是由核心网设备配置的，或者是由协议规定，或者是预配置的。
在一种实现方式中，所述方法还包括：将所述多用户OFDM的子载波伪随机分配方式发送给数据接收端和/或回波信号接收端。
在一种可选地实现方式中，所述子载波伪随机分配方式与特定时间频率资源关联，其中，在所关联 的时间频率资源上使用所述子载波伪随机分配方式。
可选地，在所述所关联的时间频率资源上使用的所述子载波伪随机分配方式固定不变；或者，在所述所关联的时间频率资源上使用的子载波伪随机分配方式在多个OFDM符号时间内时域位置发生随机变化。
通过本技术方案，可在多个OFDM符号时间内，分别使用伪随机序列，将多个子载波随机分配给多个用户使用，进一步减小不同用户信号的相关性，从而进一步提升通信雷达一体化系统探测性能。
第二方面，本公开提供一种多用户OFDM子载波分配方法，所述方法由数据接收端执行，所述方法包括：根据配置信息，确定所述数据接收端的子载波伪随机分配。
在一种实现方式中，所述配置信息是网络设备配置的，或者是由核心网设备配置的，或者是由协议规定，或者是预配置的，或者是数据发送端发送的多用户OFDM的子载波伪随机分配方式的配置信息。
在一种实现方式中，所述配置信息至少包括各用户分配的子载波的位置索引。
通过本技术方案，可将多个子载波随机分配给数据接收端，减小不同用户信号的相关性，从而提升通信雷达一体化系统探测性能。
第三方面，本公开提供一种多用户OFDM子载波分配方法，所述方法由回波信号接收端执行，所述方法包括：根据配置信息，确定所述回波信号接收端的子载波伪随机分配。
在一种实现方式中，所述配置信息是网络设备配置的，或者是由核心网设备配置的，或者是由协议规定，或者是预配置的，或者是数据发送端发送的多用户OFDM的子载波伪随机分配方式的配置信息。
在一种实现方式中，所述配置信息至少包括各用户分配的子载波的位置索引。
通过本技术方案，可将多个子载波随机分配给回波信号接收端，减小不同用户信号的相关性，从而提升通信雷达一体化系统探测性能。
第四方面，本公开提供一种多用户OFDM子载波分配装置，所述装置应用于数据发送端，所述装置包括：
第一处理模块，用于根据配置信息，确定多用户OFDM的子载波伪随机分配方式。
在一种实现方式中，所述装置还包括：第二处理模块，用于根据OFDM子载波数和用户数，确定所述配置信息。
在一种可选地实现方式中，所述配置信息至少包括各用户分配的子载波的位置索引；所述处理模块具体用于：根据OFDM子载波数，采用QPP交织器，所述QPP交织器输出伪随机序列；根据所述伪随机序列和所述用户数，确定各用户分配的子载波的位置索引。
可选地，所述QPP交织器的公式表示如下：
f(x)＝mod(f 1x+f 2x 2,N)
其中，N为所述OFDM子载波数且
Figure PCTCN2022070597-appb-000002
Γ＝{2,3,5,7,…}为质数集；f 1需满足mod(f 1,p i)>0；f 2需满足mod(f 2,p i)>0；mod为取模运算符；x为所述QPP交织器的输入序列，所述x取值为1到N的整数；对于任意一组满足条件的f 1和f 2，f(x)为所述QPP交织器输出的伪随机序列，所述f(x)取值为0到N-1的整数，即为各用户分配的子载波的位置索引。
可选地，所述根据所述伪随机序列和所述用户数，确定各用户分配的子载波的位置索引，包括：
基于所述用户数K，将所述伪随机序列中的N个数值顺序的分成K个分组，每个所述分组内的数值是为对应用户分配的子载波的位置索引；
其中，所述OFDM子载波数N可被所述用户数K整除，所述K个分组内各自所包含的数值的个数相同；
或者，所述OFDM子载波数N不可被所述用户数K整除，所述K个分组中前a个分组内各自所包含的数值的个数相同，其他分组内各自所包含的数值的个数相同，且所述前a个分组内各自所包含的数值的个数比所述其他分组内各自所包含的数值的个数多1，其中，所述a为所述OFDM子载波数N对所述用户数K取模后的值。
在一种实现方式中，所述配置信息是由网络设备配置的，或者是由核心网设备配置的，或者是由协议规定，或者是预配置的。
在一种实现方式中，所述装置还包括：发送模块，用于将所述多用户OFDM的子载波伪随机分配方式发送给数据接收端和/或回波信号接收端。
在一种可选地实现方式中，所述子载波伪随机分配方式与特定时间频率资源关联，其中，在所关联的时间频率资源上使用所述子载波伪随机分配方式。
可选地，在所述所关联的时间频率资源上使用的所述子载波伪随机分配方式固定不变；或者，在所述所关联的时间频率资源上使用的子载波伪随机分配方式在多个OFDM符号时间内时域位置发生随机变化。
第五方面，本公开提供一种多用户OFDM子载波分配方法，所述装置应用于数据接收端，所述装置包括：处理模块，用于根据配置信息，确定所述数据接收端的子载波伪随机分配。
在一种实现方式中，所述配置信息是网络设备配置的，或者是由核心网设备配置的，或者是由协议规定，或者是预配置的，或者是数据发送端发送的多用户OFDM的子载波伪随机分配方式的配置信息。
在一种可选地实现方式中，所述配置信息至少包括各用户分配的子载波的位置索引。
第六方面，本公开提供一种多用户OFDM子载波分配装置，所述装置应用于回波信号接收端，所述装置包括：处理模块，用于根据配置信息，确定所述回波信号接收端的子载波伪随机分配。
在一种实现方式中，所述配置信息是网络设备配置的，或者是由核心网设备配置的，或者是由协议规定，或者是预配置的，或者是数据发送端发送的多用户OFDM的子载波伪随机分配方式的配置信息。
在一种实现方式中，所述配置信息至少包括各用户分配的子载波的位置索引。
第七方面，本公开提供一种通信装置，包括处理器和存储器，所述存储器中存储有计算机程序，所述处理器执行所述存储器中存储的计算机程序，以使所述终端设备执行如第一方面所述的方法。
第八方面，本公开提供一种通信装置，包括处理器和存储器，所述存储器中存储有计算机程序，所述处理器执行所述存储器中存储的计算机程序，以使所述终端设备执行如第二方面所述的方法。
第九方面，本公开提供一种通信装置，包括处理器和存储器，所述存储器中存储有计算机程序，所述处理器执行所述存储器中存储的计算机程序，以使所述终端设备执行如第三方面所述的方法。
第十方面，本公开提供一种计算机可读存储介质，用于存储有指令，当所述指令被执行时，使如第一方面所述的方法被实现。
第十一方面，本公开提供一种计算机可读存储介质，用于存储有指令，当所述指令被执行时，使如第二方面所述的方法被实现。
第十二方面，本公开提供一种计算机可读存储介质，用于存储有指令，当所述指令被执行时，使如第三方面所述的方法被实现。
第十三方面，本公开提供一种计算机程序产品，包括计算机程序，所述计算机程序在被处理器执行时实现第一方面所述方法的步骤。
第十四方面，本公开提供一种计算机程序产品，包括计算机程序，所述计算机程序在被处理器执行时实现第二方面所述方法的步骤。
第十五方面，本公开提供一种计算机程序产品，包括计算机程序，所述计算机程序在被处理器执行时实现第三方面所述方法的步骤。
附图说明
为了更清楚地说明本公开实施例或背景技术中的技术方案，下面将对本公开实施例或背景技术中所需要使用的附图进行说明。
图1是本公开实施例提供的一种通信雷达一体化系统的架构示意图；
图2是本公开实施例提供的一种基于OFDM的通信雷达一体化系统架构示意图；
图3是本公开实施例提供的一种多用户OFDM子载波分配方法的流程图；
图4是本公开实施例提供的另一种多用户OFDM子载波分配方法的流程图；
图5是本公开实施例提供的又一种多用户OFDM子载波分配方法的流程图；
图6a是本公开实施例提供的一种用户时频域资源图；
图6b是本公开实施例提供的另一种用户时频域资源图；
图7a是本公开实施例提供的一种用户雷达图像；
图7b是本公开实施例提供的另一种用户雷达图像；
图8是本公开实施例提供的又一种用户雷达图像；
图9是本公开实施例提供的又一种多用户OFDM子载波分配方法的流程图；
图10是本公开实施例提供的又一种多用户OFDM子载波分配方法的流程图；
图11是本公开实施例提供的一种多用户OFDM子载波分配装置的结构示意图；
图12是本公开实施例提供的另一种多用户OFDM子载波分配装置的结构示意图；
图13是本公开实施例提供的又一种多用户OFDM子载波分配装置的结构示意图；
图14是本公开实施例提供的又一种多用户OFDM子载波分配装置的结构示意图；
图15是本公开实施例提供的又一种多用户OFDM子载波分配装置的结构示意图；
图16是本公开实施例提供的通信装置的结构示意图。
具体实施方式
下面详细描述本公开的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，旨在用于解释本公开，而不能理解为对本公开的限制。
为了更好的理解本公开实施例公开的一种多用户OFDM(Orthogonal Frequency Division Multiplexing，正交频分复用)子载波分配方法，下面首先对本公开实施例使用的通信雷达一体化系统进行描述。
请参见图1，图1为本公开实施例提供的一种通信雷达一体化系统的架构示意图。该通信雷达一体化可以包括但不限于一个数据发送端、一个数据接收端及一个回波信号接收端。图1所示的设备数量和形态仅用于举例并不构成对本公开实施例的限定，实际应用中可以包括两个或两个以上的数据发送端，两个或两个以上的数据接收端及两个或两个以上的回波信号接收端。图1所示的通信系统以包括一个数据发送端101、一个数据接收端102和一个回波信号接收端103为例。
本公开实施例中的数据发送端101及回波信号接收端103是一种用于发射或接收信号的实体。例如，数据发送端101可以为演进型基站(evolved NodeB，eNB)、传输点(transmission reception point，TRP)、NR系统中的下一代基站(next generation NodeB，gNB)、其他未来移动通信系统中的基站或无线保真(wireless fidelity，WiFi)系统中的接入节点等。本公开的实施例对数据发送端所采用的具体技术和具体设备形态不做限定。本公开实施例提供的数据发送端可以是由集中单元(central unit，CU)与分布式单元(distributed unit，DU)组成的，其中，CU也可以称为控制单元(control unit)，采用CU-DU的结构可以将数据发送端，例如基站的协议层拆分开，部分协议层的功能放在CU集中控制，剩下部分或全部协议层的功能分布在DU中，由CU集中控制DU。或者，数据发送端101及回波信号接收端103也可以是与如下数据接收端102同样类型的、用于接收或发射信号的实体。
本公开实施例中的数据接收端102是用户侧的一种用于接收或发射信号的实体，如手机。数据接收端也可以称为终端设备(terminal)、用户设备(user equipment，UE)、移动台(mobile station，MS)、移动终端设备(mobile terminal，MT)等。数据接收端可以是具备通信功能的汽车、智能汽车、手机(mobile phone)、穿戴式设备、平板电脑(Pad)、带无线收发功能的电脑、虚拟现实(virtual reality，VR)终端设备、增强现实(augmented reality，AR)终端设备、工业控制(industrial control)中的无线终端设备、无人驾驶(self-driving)中的无线终端设备、远程手术(remote medical surgery)中的无线终端设备、智能电网(smart grid)中的无线终端设备、运输安全(transportation safety)中的无线终端设备、智慧城市(smart city)中的无线终端设备、智慧家庭(smart home)中的无线终端设备等等。
需要说明的是，本公开实施例中的回波信号接收端103是一种对回波信号进行放大、变换和处理的装置。可以理解，通信雷达一体化系统应用场景可根据雷达性质分为主动式雷达系统和被动式雷达系统两种情况。
请参见图2，图2是本公开实施例提供的一种基于OFDM的通信雷达一体化系统架构示意图。如图2所示，数据发送端将需要发送的比特数据经一系列调制处理后发射，数据发送端发射的信号经目标反射后由数据接收端接收，数据接收端将接收到的信号解调，得到数据发送端发送的原始比特数据。同时回波接收端(即雷达处理器)可以根据接收到的信号确定动目标位置信息。即可同时实现数据发送端与数据接收端的通信功能，及对动目标位置进行探测的雷达功能。
在主动式雷达系统中，数据发送端和回波信号接收端为相同的设备。数据发送端发送比特数据给数据接收端，数据接收端作为接收机完成通信功能。数据发送端发送比特数据照射在数据接收端上产生的回波信号回传至回波信号接收端(即数据发送端)，回波信号接收端通过雷达处理器对数据接收端进行速度位置等信息探测，完成雷达功能。其中数据发送端、数据接收端和回波信号接收端可为：
(1)数据发送端和回波信号接收端为BS(Base Station，基站)，数据接收端为UE；
(2)数据发送端和回波信号接收端为UE 1，数据接收端为UE 2。
在被动式雷达系统中，数据发送端和回波信号接收端为不相同的设备，且可有多个回波信号接收端。数据发送端发送比特数据照射在数据接收端上产生的回波信号回传至回波信号接收端，回波信号接收端通过雷达处理器对数据接收端进行速度位置等信息探测，完成雷达功能。其中数据发送端、数据接收端和回波信号接收端可为：
(1)数据发送端为BS 1，数据接收端为UE，回波信号接收端为BS 2或一个BS集合{BS 2,BS 3,…, BS n}；
(2)数据发送端为UE 1，数据接收端为UE 2，回波信号接收端为UE 3或一个UE集合{UE 3,UE 4,…,UE k}；
(3)数据发送端为UE 1，数据接收端为UE 2，回波信号接收端为BS 1或一个BS集合{BS 1,BS 2,…,BS n}；
(4)数据发送端为BS，数据接收端为UE 1，回波信号接收端为UE 2或一个UE集合{UE 3,UE 4,…,UE k}。
由上述情况可知，网络侧和终端侧均可作为发送源发射感知信号。
需要说明的是，本公开实施例的多用户OFDM子载波分配方法中，每个用户即代表一个通信雷达一体化系统中的数据接收端。
本公开的实施例对数据发送端、数据接收端及回波信号接收端所采用的具体技术和具体设备形态不做限定。
可以理解的是，本公开实施例描述的通信系统是为了更加清楚的说明本公开实施例的技术方案，并不构成对于本公开实施例提供的技术方案的限定，本领域普通技术人员可知，随着系统架构的演变和新业务场景的出现，本公开实施例提供的技术方案对于类似的技术问题，同样适用。
下面结合附图对本公开所提供的多用户OFDM子载波分配方法、装置、通信装置和存储介质进行详细地介绍。请参见图3，图3是本公开实施例提供的一种多用户OFDM子载波分配方法流程图。该方法由数据发送端执行。如图3所示，该多用户OFDM子载波分配方法可以包括以下步骤。
步骤S301，根据配置信息，确定多用户OFDM的子载波伪随机分配方式。
其中，配置信息是由网络设备配置的，或者是由核心网设备配置的，或者是由协议规定，或者是预配置的。
示例一：
通过网络设备配置的配置信息，确定多用户OFDM的子载波伪随机分配方式。
其中，配置信息可由网络设备通过静态，和/或，半静态信令发送至数据发送端。
例如，网络设备可通过包含cell specific(小区特定)、UE group common(终端组公共)或者UE specific(终端特定)的RRC(radio resource control，无线资源控制)信令下发配置信息，数据发送端接收RRC信令，根据RRC信令中的配置信息，确定子载波分配方式；或者，网络设备可以预先配置一组子载波分配方式，通过MAC(media access control，媒体访问控制)-CE(control element，控制单元)或者DCI(downlink control information，下行控制信息)信令将配置信息发送给数据发送端，数据发送端根据接收到的配置新确定子载波分配方式；或者，网络设备可同时通过以上方法将配置信息发送至数据发送端，数据发送端接收后，根据情况自主选择子载波分配方式。
示例二：
根据核心网设备配置的配置信息，确定多用户OFDM的子载波伪随机分配方式。
其中，配置信息可由核心网设备通过静态，和/或，半静态信令下发至数据发送端。
核心网设备通过静态，和/或，半静态信令将配置信息下发至数据发送端，可分别采用本公开的各实施例中的任一种方式实现，本公开实施例并不对此作出限定，也不再赘述。
示例三：
通过协议规定的配置信息，确定多用户OFDM的子载波伪随机分配方式。
例如，可预先通过协议规定多种多用户OFDM的子载波伪随机分配方式对应的配置信息，由数据发送端自主选择合适的子载波分配方式。
示例四：
通过预配置的配置信息，确定多用户OFDM的子载波伪随机分配方式。
例如，可预先配置多种多用户OFDM的子载波伪随机分配方式对应的配置信息，由数据发送端自主选择合适的子载波分配方式。
通过实施本公开实施例，可以根据配置信息，确定多用户OFDM的子载波伪随机分配方式，从而将多个子载波随机分配给用户使用，减小不同用户信号的相关性，从而提升通信雷达一体化系统探测性能。
请参见图4，图4是本公开实施例提供的另一种多用户OFDM子载波分配方法流程图。该方法可确定用于多用户OFDM子载波分配的配置信息。在本公开一些实施例中，如图4所示，该多用户OFDM子载波分配方法可以包括以下步骤。
步骤S401，根据OFDM子载波数和用户数，确定配置信息。
其中，配置信息至少包括各用户分配的子载波的位置索引。
其中，在本公开的实施例中，各用户分配的子载波的位置索引，用于标明分配给该用户使用的子载波的频域位置。
在一种可选地实现方式中，可以根据OFDM子载波数，采用QPP(quadratic polynomial permutation，二次多项式置换)交织器，QPP交织器输出伪随机序列；根据伪随机序列和用户数，确定各用户分配的子载波的位置索引。
可选地，QPP交织器的公式表示如下：
f(x)＝mod(f 1x+f 2x 2,N)
其中，N为OFDM子载波数且
Figure PCTCN2022070597-appb-000003
Γ＝{2,3,5,7,…}为质数集；f 1需满足mod(f 1,p i)>0；f 2需满足mod(f 2,p i)>0；mod为取模运算符；x为QPP交织器的输入序列，x取值为1到N的整数；对于任意一组满足条件的f 1和f 2，f(x)为QPP交织器输出的伪随机序列，f(x)取值为0到N-1的整数，即为各用户分配的子载波的位置索引。其中，可以理解，x为由1到N这个N个整数组成的序列，输入到QPP之后得到f(x)，该f(x)输出即为由0到N-1这N个整数组成的伪随机序列，该伪随机序列中包含了为各用户分配的子载波的位置索引。
值得注意的是，本公开在子载波连续分配方式下，对分配方式进行改进，采用随机分配方式。由于硬件实现中无法设计真正意义上的随机，因此引入伪随机序列，对多用户子载波位置进行随机分配。在本公开中，Γ＝{2,3,5,7,…}表示质数集，整数N则可以分解为
Figure PCTCN2022070597-appb-000004
其中p为不同的质数，对于每一个确定的p都有n N,p≥1，否则n N,p＝0。对于一个整数N≥2和多项式
Figure PCTCN2022070597-appb-000005
其中f 1,f 2,…,f K为非负整数且K≥1，当f(x)从{0,1,…,N-1}排序时，则称f(x)是基于整数Z N的置换多项式。可以根据如下定理1和定理2来推论出上述QPP交织器的公式。
定理1：对于任意的
Figure PCTCN2022070597-appb-000006
当且仅当对于任意的质数因子p且n N,p≥1，
Figure PCTCN2022070597-appb-000007
均为QPP时，则f(x)＝mod(f 1x+f 2x 2,N)为QPP。
在定理1中，
Figure PCTCN2022070597-appb-000008
是N的因子。运用上述定理，可以判断一个多项式是否是一个模N上的PP(polynomial permutation，多项式置换)，而且对于一个整数环上的二次多项式，可得如下定理。
定理2：对于一个二次多项式f(x)＝f 1x+f 2x 2，p为任意质数且n≥2，当且仅当f 1≠mod(0,p)且f 2＝mod(0,p)时，则称是一个基于整数环
Figure PCTCN2022070597-appb-000009
的QPP。
根据定理1和定理2，可得如下推论：
推论：当且仅当对于任意的i，均有mod(f 1,p i)>0且mod(f 2,p i)＝0，则称f(x)为模
Figure PCTCN2022070597-appb-000010
上的QPP。
例如，当OFDM子载波数为N＝1024时，满足上述推论条件的f 1可以取全体正奇数，f 2可以取全体正偶数。
可选地，根据伪随机序列和用户数，确定各用户分配的子载波的位置索引的实现方式可如下：基于用户数K，将伪随机序列中的N个数值顺序的分成K个分组，每个分组内的数值是为对应用户分配的子载波的位置索引；其中，OFDM子载波数N可被用户数K整除，K个分组内各自所包含的数值的个数相同；或者，OFDM子载波数N不可被用户数K整除，K个分组中前a个分组内各自所包含的数值的个数相同，其他分组内各自所包含的数值的个数相同，且前a个分组内各自所包含的数值的个数比其他分组内各自所包含的数值的个数多1，其中，a为OFDM子载波数N对用户数K取模后的值。
在一种实现方式中，假设用户数为K，a＝mod(N,K)，
Figure PCTCN2022070597-appb-000011
b为N与K的商向下取整后得到的值；响应于a＝0，即代表OFDM子载波数N可整除用户数K，则为第k个用户分配的子载波的位置索引分别为f(x)且x＝(k-1)b+1,…,kb，1≤k≤K，为每个用户所分配的子载波位置索引的数值的 个数相同；或者，响应于a>0，即代表OFDM子载波数N不可整除所述用户数K，若1≤k≤a，则为第k个用户分配的子载波的位置索引分别为f(x)且x＝(k-1)(b+1)+1,…,k(b+1)；若a<k≤K，则为第k个用户分配的子载波的位置索引分别为f(x)且x＝(k-a-1)b+a(b+1)+1,…,(k-a)b+a(b+1)，为满足条件的、次序靠前的用户所分配的子载波的位置索引的数值的个数，比未满足条件的、靠后的用户所分配的子载波的位置索引的数值的个数多1。
举例而言，确定OFDM子载波数及用户数后，可根据上述公式，依次为每个用户分配相应的x取值，根据每个用户分配到的x取值及N、f 1、f 2的值带入上述QPP公式即可得到为该用户分配的子载波的位置索引。
作为一种示例，当OFDM子载波数N＝1024，用户数K＝4，即包括1、2、3和4四个用户时。a＝mod(N,K)＝mod(1024,4)＝0，代表OFDM子载波数N可被用户数K整除，
Figure PCTCN2022070597-appb-000012
将k＝1及b＝256带入公式x＝(k-1)b+1,…,kb可得，则为第1个用户分配的子载波的位置索引分别为[f(1)，f(2)，f(3)...f(256)]。这种情况下，为每个用户所分配的子载波位置索引的数值的个数相同。
作为另一种示例，当OFDM子载波数N＝1026，用户数K＝4，即包括1、2、3和4四个用户时。a＝mod(N,K)＝mod(1024,4)＝2，代表OFDM子载波数N不可被用户数K整除，
Figure PCTCN2022070597-appb-000013
第1个用户满足1≤1≤2，将k＝1及b＝256带入公式x＝(k-1)(b+1)+1,…,k(b+1)可得，为第1个用户分配的子载波的位置索引分别为[f(1)，f(2)，f(3)...f(256)，f(257)]，共有257个子载波的位置索引。第3个用户满足2<3≤4，将k＝3及b＝256带入公式x＝(k-a-1)b+a(b+1)+1,…,(k-a)b+a(b+1)可得，为第3个用户分配的子载波的位置索引分别为[f(515)，f(516)，f(517)...f(770)]，共有256个子载波的位置索引。这种情况下，满足条件的前2个用户所对应的前2个分组内各自所包含的子载波的位置索引的数值的个数，比未满足条件的后2个用户对应的后2个分组内各自所包含子载波的位置索引的数值的个数多1。
作为又一种示例，当OFDM子载波数为1024时，取f 1＝1、f 2＝16。用户1、2、3和4各自占用256个子载波。根据上述分配方式可得，为第1个用户分配的256个x的取值中的一个为x＝20，将N＝1024、f 1＝1、f 2＝16、x＝20带入QPP公式可得f(20)＝276，则第1个用户的一个可用子载波为第277子载波，将所有分配给第1个用户的x取值依次带入，即可得到第1个用户的所有子载波位置索引。
步骤S402，根据配置信息，确定多用户OFDM的子载波伪随机分配方式。
在本公开的实施例中，步骤S402可以分别采用本公开的各实施例中的任一种方式实现，本公开实施例并不对此作出限定，也不再赘述。
通过实施本公开实施例，可根据OFDM子载波数生成伪随机序列，将多个子载波随机分配给用户使用，减小不同用户信号的相关性，从而提升通信雷达一体化系统探测性能。
请参见图5，图5是本公开实施例提供的又一种多用户OFDM子载波分配方法流程图。该方法可将子载波伪随机分配方式发送至同一通信雷达一体化系统的数据接收端和/或回波信号接收端。如图5所示，该多用户OFDM子载波分配方法可以包括以下步骤。
步骤S501，根据配置信息，确定多用户OFDM的子载波伪随机分配方式。
在本公开的实施例中，步骤S501可以分别采用本公开的各实施例中的任一种方式实现，本公开实施例并不对此作出限定，也不再赘述。
步骤S502，将多用户OFDM的子载波伪随机分配方式发送给数据接收端和/或回波信号接收端。
举例而言，数据发送端通过上述任一方式确定多用户OFDM的子载波伪随机分配方式后，可将子载波分配方式通过控制信令传输给数据接收端和/或回波信号接收端。
在一种可选地实现方式中，子载波伪随机分配方式与特定时间频率资源关联，其中，在所关联的时间频率资源上使用子载波伪随机分配方式。
举例而言，可在特定时间内的、可用的频域资源上，使用本公开任一实施例提供的伪随机分配方式，为多个用户分配子载波。
可选地，在所关联的时间频率资源上使用的子载波伪随机分配方式固定不变；或者，在所关联的时 间频率资源上使用的子载波伪随机分配方式在多个OFDM符号时间内时域位置发生随机变化。
举例而言，使用本公开任一实施例提供的伪随机分配方式，为每个用户分配其可用的子载波位置后，在一段连续可用的时间资源上，每个用户可用的子载波的位置固定不变；或者，将一段可用的时间资源划分为多个OFDM符号时间，在每个OFDM符号时间内，使用本公开任一实施例提供的伪随机分配方式，为每个用户重新分配不同的子载波位置，使每个用户在不同的OFDM符号时间内的可用子载波发生变化。
作为一种示例，设共有四个用户1、2、3和4，每个用户在256个OFDM符号时间内，各自占用1024个子载波中的256个，且每个用户的子载波位置使用本公开实施例提供QPP交织器输出的伪随机序列进行伪随机分配，且在256个OFDM符号时间内每个用户的子载波位置保持不变，请参见图6a及图6b，如图6a所示，为选取的参数为f 1＝1、f 2＝16时，用户1的时频资源图，如图6b所示，选取的参数为f 1＝1、f 2＝16时，用户1的时频资源图。其中，箭头601及箭头603所指示的及图中其他白色部分，代表用户1占用的子载波，如箭头602及604所指示的及图中其他黑色部分，表示用户1未占用的子载波。请参见图7a及图7b，如图7a所示，为选取的参数为f 1＝15、f 2＝32时，用户1的雷达图像，如图7b所示，为选取的参数为f 1＝1、f 2＝16时，用户1的雷达图像。从图7a及图7b中可以看出，不论选取何种参数，雷达探测图像的旁瓣都较为明显，表明探测效果较差。
作为另一种示例，设共有四个用户1、2、3和4，每个用户在256个OFDM符号时间内，各自占用1024个子载波中的256个，且在不同OFDM符号时间上，每个用户的子载波位置使用本公开实施例提供QPP交织器输出的伪随机序列进行伪随机分配。即在时频域资源图上，单个用户占用的子载波表现为离散化的点状图形。请参见图8，如图8所示，为每个用户在不同的OFDM符号时间内的可用子载波发生变化的情况下，用户1的雷达探测图像示意图，从图中可以看出，此时用户1可以清晰地分辨出其他三个用户，探测效果明显优于每个用户可用的子载波的位置固定不变的情况。
通过实施本公开实施例，可在多个OFDM符号时间内，分别使用伪随机序列，将多个子载波随机分配给多个用户使用，进一步减小不同用户信号的相关性，从而进一步提升通信雷达一体化系统探测性能。
请参见图9，图9是本公开实施例提供的一种多用户OFDM子载波分配方法。该方法由数据接收端执行。如图9所示，该多用户OFDM子载波分配方法可以包括以下步骤。
步骤S901，根据配置信息，确定数据接收端的子载波伪随机分配。
其中，配置信息是网络设备配置的，或者是由核心网设备配置的，或者是由协议规定，或者是预配置的，或者是数据发送端发送的多用户OFDM的子载波伪随机分配方式的配置信息。
在本公开的实施例中，步骤S901可分别采用本公开的各实施例中的任一种方式实现，本公开实施例并不对此作出限定，也不再赘述。
在一种实现方式中，配置信息至少包括各用户分配的子载波的位置索引。
举例而言，数据接收端可根据配置信息中的子载波的位置索引，确定其可用的子载波的频域位置。
通过实施本公开实施例，可将多个子载波随机分配给数据接收端，减小不同用户信号的相关性，从而提升通信雷达一体化系统探测性能。
请参见图10，图10是本公开实施例提供的一种多用户OFDM子载波分配方法流程图。该方法由回波信号接收端执行。如图10所示，该多用户OFDM子载波分配方法可以包括以下步骤。
步骤S1001，根据配置信息，确定回波信号接收端的子载波伪随机分配。
其中，配置信息是网络设备配置的，或者是由核心网设备配置的，或者是由协议规定，或者是预配置的，或者是数据发送端发送的多用户OFDM的子载波伪随机分配方式的配置信息。
在本公开的实施例中，步骤S1001可分别采用本公开的各实施例中的任一种方式实现，本公开实施例并不对此作出限定，也不再赘述。
在一种可选的实现方式中，配置信息至少包括各用户分配的子载波的位置索引。
举例而言，回波信号接收端可根据配置信息中的子载波的位置索引，确定其可用的子载波的频域位置。
通过实施本公开实施例，可将多个子载波随机分配给回波信号接收端，减小不同用户信号的相关性，从而提升通信雷达一体化系统探测性能。
请参见图11，图11是本公开实施例提供的一种多用户OFDM子载波分配装置的示意图。该装置可应用于数据发送端。如图11所示，该多用户OFDM子载波分配装置包括第一处理模块1101。
其中，第一处理模块1101用于：根据配置信息，确定多用户OFDM的子载波伪随机分配方式。
在一种实现方式中，如图12所示，该多用户OFDM子载波分配装置还可包括第二处理模块1202。 其中，第二处理模块1202用于：根据OFDM子载波数和用户数，确定配置信息。其中，图12中1201和图11中1101具有相同功能和结构。
在一种可选地实现方式中，配置信息至少包括各用户分配的子载波的位置索引；第二处理模块1202具体用于：根据OFDM子载波数，采用QPP交织器，QPP交织器输出伪随机序列；根据伪随机序列和用户数，确定各用户分配的子载波的位置索引。
可选地，QPP交织器的公式表示如下：
f(x)＝mod(f 1x+f 2x 2,N)
其中，N为OFDM子载波数且
Figure PCTCN2022070597-appb-000014
Γ＝{2,3,5,7,…}为质数集；f 1需满足mod(f 1,p i)>0；f 2需满足mod(f 2,p i)>0；mod为取模运算符；x为QPP交织器的输入序列，x取值为1到N的整数；对于任意一组满足条件的f 1和f 2，f(x)为QPP交织器输出的伪随机序列，f(x)取值为0到N-1的整数，即为各用户分配的子载波的位置索引。
可选地，第二处理模块1201具体用户：根据伪随机序列和用户数，确定各用户分配的子载波的位置索引的实现方式可如下：基于用户数K，将伪随机序列中的N个数值顺序的分成K个分组，每个分组内的数值是为对应用户分配的子载波的位置索引；其中，OFDM子载波数可被用户数K整除，K个分组内各自所包含的数值的个数相同；或者，OFDM子载波数N不可被用户数K整除，K个分组中前a个分组内各自所包含的数值的个数相同，其他分组内各自所包含的数值的个数相同，且前K个分组内各自所包含的数值的个数比其他分组内各自所包含的数值的个数多1，其中，a为OFDM子载波数N对用户数K取模后的值。
在一种实现方式中，配置信息是由网络设备配置的，或者是由核心网设备配置的，或者是由协议规定，或者是预配置的。
在一种实现方式中，如图13所示，该多用户OFDM子载波分配装置还可包括发送处理模块1302。其中，第二处理模块1302用于：将多用户OFDM的子载波伪随机分配方式发送给数据接收端和/或回波信号接收端。其中，图13中1301和图11中1101具有相同功能和结构。
可选地，子载波伪随机分配方式与特定时间频率资源关联，其中，在所关联的时间频率资源上使用子载波伪随机分配方式。
可选地，在所关联的时间频率资源上使用的子载波伪随机分配方式固定不变；或者，在所关联的时间频率资源上使用的子载波伪随机分配方式在多个OFDM符号时间内时域位置发生随机变化。
请参见图14，图14是本公开实施例提供的又一种多用户OFDM子载波分配装置。该装置应用于数据接收端。如图14所示，该多用户OFDM子载波分配装置包括：处理模块1401，用于根据配置信息，确定数据接收端的子载波伪随机分配。
在一种实现方式中，配置信息是网络设备配置的，或者是由核心网设备配置的，或者是由协议规定，或者是预配置的，或者是数据发送端发送的多用户OFDM的子载波伪随机分配方式的配置信息。
在一种实现方式中，配置信息至少包括各用户分配的子载波的位置索引。
请参见图15，图15是本公开实施例提供的又一种多用户OFDM子载波分配装置。该装置应用于回波信号接收端。如图15所示，该多用户OFDM子载波分配装置包括：处理模块1501，用于根据配置信息，确定回波信号接收端的子载波伪随机分配。
在一种实现方式中，配置信息是网络设备配置的，或者是由核心网设备配置的，或者是由协议规定，或者是预配置的，或者是数据发送端发送的多用户OFDM的子载波伪随机分配方式的配置信息。
在一种实现方式中，配置信息至少包括各用户分配的子载波的位置索引。
通过实施本公开实施例，可基于伪随机序列，将多个子载波随机分配给用户使用，减小不同用户信号的相关性，从而提升通信雷达一体化系统探测性能。
关于上述实施例中的装置，其中各个模块执行操作的具体方式已经在有关该方法的实施例中进行了详细描述，此处将不做详细阐述说明。
请参见图16，图16是本公开实施例提供的通信装置1600的结构示意图。通信装置1600可以是通信装置，还可以是支持通信装置实现上述方法的芯片、芯片系统、或处理器等。该通信装置可用于实现上述方法实施例中描述的方法，具体可以参见上述方法实施例中的说明。
通信装置1600可以包括一个或多个处理器1601。处理器1601可以是通用处理器或者专用处理器等。例如可以是基带处理器或中央处理器。基带处理器可以用于对通信协议以及通信数据进行处理，中央处理器可以用于对通信装置(如，基站、基带芯片，电子设备、电子设备芯片，DU或CU等)进行 控制，执行计算机程序，处理计算机程序的数据。
可选的，通信装置1600中还可以包括一个或多个存储器1602，其上可以存有计算机程序1604，处理器1601执行所述计算机程序1604，以使得通信装置1600执行上述方法实施例中描述的方法。可选的，所述存储器1602中还可以存储有数据。通信装置1600和存储器1602可以单独设置，也可以集成在一起。
可选的，通信装置1600还可以包括收发器1605、天线1606。收发器1605可以称为收发单元、收发机、或收发电路等，用于实现收发功能。收发器1605可以包括接收器和发送器，接收器可以称为接收机或接收电路等，用于实现接收功能；发送器可以称为发送机或发送电路等，用于实现发送功能。
可选的，通信装置1600中还可以包括一个或多个接口电路1607。接口电路1607用于接收代码指令并传输至处理器1601。处理器1601运行所述代码指令以使通信装置1600执行上述方法实施例中描述的方法。
通信装置1600为前述方法实施例中的数据发送端：处理器1601用于执行图3中的步骤S301，图4中的步骤S401。收发器1605用于执行图5中的步骤S501。
通信装置1600为前述方法实施例中的数据接收端：处理器1601用于执行图9中的步骤S901。
通信装置1600为前述方法实施例中的回波信号接收端：处理器1601用于执行图10中的步骤S1001。
在一种实现方式中，处理器1601中可以包括用于实现接收和发送功能的收发器。例如该收发器可以是收发电路，或者是接口，或者是接口电路。用于实现接收和发送功能的收发电路、接口或接口电路可以是分开的，也可以集成在一起。上述收发电路、接口或接口电路可以用于代码/数据的读写，或者，上述收发电路、接口或接口电路可以用于信号的传输或传递。
在一种实现方式中，处理器1601可以存有计算机程序1603，计算机程序1603在处理器1601上运行，可使得通信装置1601执行上述方法实施例中描述的方法。计算机程序1603可能固化在处理器1601中，该种情况下，处理器1601可能由硬件实现。
在一种实现方式中，通信装置1601可以包括电路，所述电路可以实现前述方法实施例中发送或接收或者通信的功能。本公开中描述的处理器和收发器可实现在集成电路(integrated circuit，IC)、模拟IC、射频集成电路RFIC、混合信号IC、专用集成电路(application specific integrated circuit，ASIC)、印刷电路板(printed circuit board，PCB)、电子设备等上。该处理器和收发器也可以用各种IC工艺技术来制造，例如互补金属氧化物半导体(complementary metal oxide semiconductor，CMOS)、N型金属氧化物半导体(nMetal-oxide-semiconductor，NMOS)、P型金属氧化物半导体(positive channel metal oxide semiconductor，PMOS)、双极结型晶体管(bipolar junction transistor，BJT)、双极CMOS(BiCMOS)、硅锗(SiGe)、砷化镓(GaAs)等。
以上实施例描述中的通信装置可以是网络设备或者终端设备(如前述方法实施例中的数据发送端、数据接收端及回波信号接收端)，但本公开中描述的通信装置的范围并不限于此，而且通信装置的结构可以不受图11的限制。通信装置可以是独立的设备或者可以是较大设备的一部分。例如所述通信装置可以是：
(1)独立的集成电路IC，或芯片，或，芯片系统或子系统；
(2)具有一个或多个IC的集合，可选的，该IC集合也可以包括用于存储数据，计算机程序的存储部件；
(3)ASIC，例如调制解调器(Modem)；
(4)可嵌入在其他设备内的模块；
(5)接收机、终端设备、智能终端设备、蜂窝电话、无线设备、手持机、移动单元、车载设备、网络设备、云设备、人工智能设备等等；
(6)其他等等。
本领域技术人员还可以了解到本公开实施例列出的各种说明性逻辑块(illustrative logical block)和步骤(step)可以通过电子硬件、电脑软件，或两者的结合进行实现。这样的功能是通过硬件还是软件来实现取决于特定的应用和整个系统的设计要求。本领域技术人员可以对于每种特定的应用，可以使用各种方法实现所述的功能，但这种实现不应被理解为超出本公开实施例保护的范围。
本公开还提供一种可读存储介质，其上存储有指令，该指令被计算机执行时实现上述任一方法实施例的功能。
本公开还提供一种计算机程序产品，该计算机程序产品被计算机执行时实现上述任一方法实施例的功能。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实 现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机程序。在计算机上加载和执行所述计算机程序时，全部或部分地产生按照本公开实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机程序可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机程序可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line，DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)、光介质(例如，高密度数字视频光盘(digital video disc，DVD))、或者半导体介质(例如，固态硬盘(solid state disk，SSD))等。
本领域普通技术人员可以理解：本公开中涉及的第一、第二等各种数字编号仅为描述方便进行的区分，并不用来限制本公开实施例的范围，也表示先后顺序。
本公开中的至少一个还可以描述为一个或多个，多个可以是两个、三个、四个或者更多个，本公开不做限制。在本公开实施例中，对于一种技术特征，通过“第一”、“第二”、“第三”、“A”、“B”、“C”和“D”等区分该种技术特征中的技术特征，该“第一”、“第二”、“第三”、“A”、“B”、“C”和“D”描述的技术特征间无先后顺序或者大小顺序。
本公开中各表所示的对应关系可以被配置，也可以是预定义的。各表中的信息的取值仅仅是举例，可以配置为其他值，本公开并不限定。在配置信息与各参数的对应关系时，并不一定要求必须配置各表中示意出的所有对应关系。例如，本公开中的表格中，某些行示出的对应关系也可以不配置。又例如，可以基于上述表格做适当的变形调整，例如，拆分，合并等等。上述各表中标题示出参数的名称也可以采用通信装置可理解的其他名称，其参数的取值或表示方式也可以通信装置可理解的其他取值或表示方式。上述各表在实现时，也可以采用其他的数据结构，例如可以采用数组、队列、容器、栈、线性表、指针、链表、树、图、结构体、类、堆、散列表或哈希表等。
本公开中的预定义可以理解为定义、预先定义、存储、预存储、预协商、预配置、固化、或预烧制。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本公开的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
以上所述，仅为本公开的具体实施方式，但本公开的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本公开揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本公开的保护范围之内。因此，本公开的保护范围应以所述权利要求的保护范围为准。

Claims (39)

  1. 一种多用户正交频分复用OFDM子载波分配方法，其特征在于，所述方法由数据发送端执行，所述方法包括：
    根据配置信息，确定多用户OFDM的子载波伪随机分配方式。
  2. 根据权利要求1所述的方法，其特征在于，还包括：
    根据OFDM子载波数和用户数，确定所述配置信息。
  3. 根据权利要求2所述的方法，其特征在于，所述配置信息至少包括各用户分配的子载波的位置索引；所述根据OFDM子载波数和用户数，确定所述配置信息，包括：
    根据OFDM子载波数，采用二次多项式置换QPP交织器，所述QPP交织器输出伪随机序列；
    根据所述伪随机序列和所述用户数，确定各用户分配的子载波的位置索引。
  4. 根据权利要求3所述的方法，其特征在于，所述二次多项式置换QPP交织器的公式表示如下：
    f(x)＝mod(f 1x+f 2x 2,N)
    其中，N为所述OFDM子载波数且
    Figure PCTCN2022070597-appb-100001
    Γ＝{2,3,5,7,…}；f 1需满足mod(f 1,p i)>0；f 2需满足mod(f 2,p i)>0；mod为取模运算符；x为所述QPP交织器的输入序列，所述x取值为1到N的整数；对于任意一组满足条件的f 1和f 2，f(x)为所述QPP交织器输出的伪随机序列，所述f(x)取值为0到N-1的整数，即为所述各用户分配的子载波的位置索引。
  5. 根据权利要求4所述的方法，其特征在于，所述根据所述伪随机序列和所述用户数，确定各用户分配的子载波的位置索引，包括：
    基于所述用户数K，将所述伪随机序列中的N个数值顺序的分成K个分组，每个所述分组内的数值是为对应用户分配的子载波的位置索引；
    其中，所述OFDM子载波数N可被所述用户数K整除，所述K个分组内各自所包含的数值的个数相同；
    或者，所述OFDM子载波数N不可被所述用户数K整除，所述K个分组中前a个分组内各自所包含的数值的个数相同，其他分组内各自所包含的数值的个数相同，且所述前a个分组内各自所包含的数值的个数比所述其他分组内各自所包含的数值的个数多1，其中，所述a为所述OFDM子载波数N对所述用户数K取模后的值。
  6. 根据权利要求1所述的方法，其特征在于，所述配置信息是由网络设备配置的，或者是由核心网设备配置的，或者是由协议规定，或者是预配置的。
  7. 根据权利要求1至6中任一项所述的方法，其特征在于，还包括：
    将所述多用户OFDM的子载波伪随机分配方式发送给数据接收端和/或回波信号接收端。
  8. 根据权利要求7所述的方法，其特征在于，所述子载波伪随机分配方式与特定时间频率资源关联，其中，在所关联的时间频率资源上使用所述子载波伪随机分配方式。
  9. 根据权利要求8所述的方法，其特征在于，
    在所述所关联的时间频率资源上使用的所述子载波伪随机分配方式固定不变；
    或者，在所述所关联的时间频率资源上使用的子载波伪随机分配方式在多个OFDM符号时间内时域位置发生随机变化。
  10. 一种多用户正交频分复用OFDM子载波分配方法，其特征在于，所述方法由数据接收端执行，所述方法包括：
    根据配置信息，确定所述数据接收端的子载波伪随机分配。
  11. 根据权利要求10所述的方法，其特征在于，所述配置信息是网络设备配置的，或者是由核心网设备配置的，或者是由协议规定，或者是预配置的，或者是数据发送端发送的多用户OFDM的子载波伪随机分配方式的配置信息。
  12. 根据权利要求10或11所述的方法，其特征在于，所述配置信息至少包括各用户分配的子载波的位置索引。
  13. 一种多用户正交频分复用OFDM子载波分配方法，其特征在于，所述方法由回波信号接收端执行，所述方法包括：
    根据配置信息，确定所述回波信号接收端的子载波伪随机分配。
  14. 根据权利要求13所述的方法，其特征在于，所述配置信息是网络设备配置的，或者是由核心网设备配置的，或者是由协议规定，或者是预配置的，或者是数据发送端发送的多用户OFDM的子载波伪随机分配方式的配置信息。
  15. 根据权利要求13或14所述的方法，其特征在于，所述配置信息至少包括各用户分配的子载波的位置索引。
  16. 一种多用户正交频分复用OFDM子载波分配装置，其特征在于，所述装置应用于数据发送端，所述装置包括：
    第一处理模块，用于根据配置信息，确定多用户OFDM的子载波伪随机分配方式。
  17. 根据权利要求16所述的装置，其特征在于，所述装置还包括：
    第二处理模块，根据OFDM子载波数和用户数，确定所述配置信息。
  18. 根据权利要求17所述的装置，其特征在于，所述配置信息至少包括各用户分配的子载波的位置索引；所述第二处理模块具体用于：
    根据OFDM子载波数，采用二次多项式置换QPP交织器，获得所述QPP交织器输出的伪随机序列；
    根据所述伪随机序列和所述用户数，确定各用户分配的子载波的位置索引。
  19. 根据权利要求18所述的装置，其特征在于，所述二次多项式置换QPP交织器的公式表示如下：
    f(x)＝mod(f 1x+f 2x 2,N)
    其中，N为所述OFDM子载波数且
    Figure PCTCN2022070597-appb-100002
    Γ＝{2,3,5,7,…}；f 1需满足mod(f 1,p i)>0；f 2需满足mod(f 2,p i)>0；mod为取模运算符；x为所述QPP交织器的输入序列，所述x取值为1到N的整数；对于任意一组满足条件的f 1和f 2，f(x)为所述QPP交织器输出的伪随机序列，所述f(x)取值为0到N-1的整数，即为所述各用户分配的子载波的位置索引。
  20. 根据权利要求19所述的装置，其特征在于，所述第二处理模块具体用于：
    基于所述用户数K，将所述伪随机序列中的N个数值顺序的分成K个分组，每个所述分组内的数值是为对应用户分配的子载波的位置索引；
    其中，所述OFDM子载波数N可被所述用户数K整除，所述K个分组内各自所包含的数值的个数相同；
    或者，所述OFDM子载波数N不可被所述用户数K整除，所述K个分组中前a个分组内各自所包含的数值的个数相同，其他分组内各自所包含的数值的个数相同，且所述前a个分组内各自所包含的数值的个数比所述其他分组内各自所包含的数值的个数多1，其中，所述a为所述OFDM子载波数N对所述用户数K取模后的值。
  21. 根据权力要求16所述的装置，其特征在于，所述配置信息是由网络设备配置的，或者是由核心网设备配置的，或者是由协议规定，或者是预配置的。
  22. 根据权利要求16-21任一项所述的装置，其特征在于，所述装置还包括：
    发送模块，用于将所述多用户OFDM的子载波伪随机分配方式发送给数据接收端和/或回波信号接收端。
  23. 根据权利要求22所述的装置，其特征在于，所述子载波伪随机分配方式与特定时间频率资源关联，其中，在所关联的时间频率资源上使用所述子载波伪随机分配方式。
  24. 根据权利要求23所述的装置，其特征在于，
    在所述所关联的时间频率资源上使用的所述子载波伪随机分配方式固定不变；
    或者，在所述所关联的时间频率资源上使用的子载波伪随机分配方式在多个OFDM符号时间内时域位置发生随机变化。
  25. 一种多用户正交频分复用OFDM子载波分配装置，其特征在于，所述装置应用于数据接收端，所述装置包括：
    处理模块，用于根据配置信息，确定所述数据接收端的子载波伪随机分配。
  26. 根据权利要求25所述的装置，其特征在于，所述配置信息是网络设备配置的，或者是由核心网设备配置的，或者是由协议规定，或者是预配置的，或者是数据发送端发送的多用户OFDM的子载波伪随机分配方式的配置信息。
  27. 根据权利要求25或26所述的装置，其特征在于，所述配置信息至少包括各用户分配的子载波的位置索引。
  28. 一种多用户正交频分复用OFDM子载波分配装置，其特征在于，所述装置应用于回波信号接收端，所述装置包括：
    处理模块，用于根据配置信息，确定所述回波信号接收端的子载波伪随机分配。
  29. 根据权利要求28所述的装置，其特征在于，所述配置信息是网络设备配置的，或者是由核心网设备配置的，或者是由协议规定，或者是预配置的，或者是数据发送端发送的多用户OFDM的子载波伪随机分配方式的配置信息。
  30. 根据权利要求28或29所述的装置，其特征在于，所述配置信息至少包括各用户分配的子载波的位置索引。
  31. 一种通信装置，其特征在于，包括处理器和存储器，所述存储器中存储有计算机程序，所述处理器执行所述存储器中存储的计算机程序，以使所述终端设备执行如权利要求1至9中任一项所述的方法。
  32. 一种通信装置，其特征在于，包括处理器和存储器，所述存储器中存储有计算机程序，所述处理器执行所述存储器中存储的计算机程序，以使所述终端设备执行如权利要求10至12中任一项所述的方法。
  33. 一种通信装置，其特征在于，包括处理器和存储器，所述存储器中存储有计算机程序，所述处理器执行所述存储器中存储的计算机程序，以使所述终端设备执行如权利要求13至15中任一项所述的方法。
  34. 一种计算机可读存储介质，用于存储有指令，当所述指令被执行时，使如权利要求1至9中任一项所述的方法被实现。
  35. 一种计算机可读存储介质，用于存储有指令，当所述指令被执行时，使如权利要求10至12中任一项所述的方法被实现。
  36. 一种计算机可读存储介质，用于存储有指令，当所述指令被执行时，使如权利要求13至15中任一项所述的方法被实现。
  37. 一种计算机程序产品，包括计算机程序，所述计算机程序在被处理器执行时实现权利要求1至9中任一项所述方法的步骤。
  38. 一种计算机程序产品，包括计算机程序，所述计算机程序在被处理器执行时实现权利要求10至12中任一项所述方法的步骤。
  39. 一种计算机程序产品，包括计算机程序，所述计算机程序在被处理器执行时实现权利要求13至15中任一项所述方法的步骤。
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