WO2022068684A1 - 相位噪声补偿方法及装置 - Google Patents

相位噪声补偿方法及装置 Download PDF

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Publication number
WO2022068684A1
WO2022068684A1 PCT/CN2021/120196 CN2021120196W WO2022068684A1 WO 2022068684 A1 WO2022068684 A1 WO 2022068684A1 CN 2021120196 W CN2021120196 W CN 2021120196W WO 2022068684 A1 WO2022068684 A1 WO 2022068684A1
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Prior art keywords
phase noise
ofdm symbols
time
domain
tracking reference
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PCT/CN2021/120196
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English (en)
French (fr)
Inventor
李传军
宋月霞
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大唐移动通信设备有限公司
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Publication of WO2022068684A1 publication Critical patent/WO2022068684A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/02Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path

Definitions

  • the present disclosure relates to the field of communication technologies, and in particular, to a phase noise compensation method and device.
  • phase noise comes from the local oscillators in the transmitter and receiver, which will affect the transmission of multi-carrier signals.
  • the influence of phase noise will be more serious, and it is necessary to compensate the phase noise of the received signal to ensure the system performance.
  • the impact of phase noise on the data signal mainly has two aspects: one is the common phase noise error (Common Phase Error, CPE), at this time, each sub-carrier has a common phase rotation, and the other is the interference between sub-carriers ( Inter-Carrier Interference, ICI).
  • CPE Common Phase Error
  • ICI Inter-Carrier Interference
  • comb-shaped (or grid-shaped) transmission resources are defined in the frequency domain for phase-tracking reference signal (PTRS)
  • PTRS phase-tracking reference signal
  • the comb transmission resource is only considered to eliminate the influence of CPE on the data signal, and cannot effectively eliminate the influence of ICI on the data signal.
  • the carrier frequency becomes higher and higher, it is not enough to only eliminate the influence of the CPE on the data signal. At this time, eliminating the influence of the ICI on the data signal becomes an urgent problem to be solved.
  • the purpose of the present disclosure is to provide a phase noise compensation method and device to solve the problem in the related art that the comb-shaped transmission resources in the frequency domain cannot simultaneously eliminate the effects of CPE and ICI on data signals.
  • an embodiment of the present disclosure provides a phase noise compensation method, including:
  • the first transmission resource includes: at least one first OFDM symbol and a first subcarrier group located on each of the first OFDM symbols, the first subcarrier A group includes contiguous subcarriers;
  • phase noise compensation is performed on the first time domain signal to obtain a compensated second time domain signal, and the first time domain signal is the received
  • the time domain signal with the cyclic prefix removed from the OFDM symbols, is the number of OFDM symbols in a slot.
  • the first subcarrier group has a first guard interval resource and a second guard interval resource
  • the first guard interval resource includes continuous subcarriers, the position of the starting subcarrier of the first guard interval resource is adjacent to the position of the ending subcarrier of the first subcarrier group, and the first guard interval The number of consecutive subcarriers in the resource is greater than or equal to the number of consecutive subcarriers in the first subcarrier group;
  • the second guard interval resource includes continuous subcarriers, the position of the ending subcarrier of the second guard interval resource is adjacent to the position of the starting subcarrier of the first carrier group, and the second guard interval resource is continuous.
  • the number of subcarriers in the first subcarrier group is greater than or equal to the number of consecutive subcarriers in the first subcarrier group.
  • the first transmission resource is configured by the base station.
  • obtaining the phase tracking reference signal through the first transmission resource includes:
  • a phase tracking reference signal on consecutive subcarriers on the first OFDM symbol is obtained.
  • performing phase noise compensation on the first time domain signal according to the phase tracking reference signal to obtain a compensated second time domain signal including:
  • phase noise compensation is performed on the first time-domain signal to obtain a compensated second time-domain signal.
  • acquiring the frequency-domain phase noise response of the phase tracking reference signal on each of the first OFDM symbols on the at least one first OFDM symbol on the corresponding continuous subcarriers includes:
  • Time-domain phase noise response at consecutive sampling points over OFDM symbols including:
  • the The frequency-domain phase noise response of each OFDM symbol on its corresponding consecutive subcarriers over OFDM symbols, generating Time-domain phase noise response at consecutive sampling points over OFDM symbols including:
  • the frequency domain phase noise response is mapped into a vector T, where the vector N FFT is the Fourier transform order;
  • an embodiment of the present disclosure provides a phase noise compensation device, including: a memory, a transceiver, and a processor: a memory for storing program instructions; and a transceiver for receiving and transmitting under the control of the processor data; a processor for reading program instructions in said memory and performing the following operations:
  • the first transmission resource includes: at least one first OFDM symbol and a first subcarrier group located on each of the first OFDM symbols, the first subcarrier A group includes contiguous subcarriers;
  • phase noise compensation is performed on the first time domain signal to obtain a compensated second time domain signal, and the first time domain signal is the received
  • the time domain signal with the cyclic prefix removed from the OFDM symbols, is the number of OFDM symbols in a slot.
  • the first subcarrier group has a first guard interval resource and a second guard interval resource
  • the first guard interval resource includes continuous subcarriers, the position of the starting subcarrier of the first guard interval resource is adjacent to the position of the ending subcarrier of the first subcarrier group, and the first guard interval The number of consecutive subcarriers in the resource is greater than or equal to the number of consecutive subcarriers in the first subcarrier group;
  • the second guard interval resource includes continuous subcarriers, the position of the ending subcarrier of the second guard interval resource is adjacent to the position of the starting subcarrier of the first carrier group, and the second guard interval resource is continuous.
  • the number of subcarriers in the first subcarrier group is greater than or equal to the number of consecutive subcarriers in the first subcarrier group.
  • the first transmission resource is configured by the base station.
  • the processor specifically includes:
  • a phase tracking reference signal on consecutive subcarriers on the first OFDM symbol is obtained.
  • the processor specifically includes:
  • phase noise compensation is performed on the first time-domain signal to obtain a compensated second time-domain signal.
  • the processor specifically includes:
  • the processor specifically includes:
  • the processor specifically includes:
  • the frequency domain phase noise response is mapped into a vector T, where the vector N FFT is the Fourier transform order;
  • an embodiment of the present disclosure also provides a phase noise compensation device, including:
  • an acquisition module configured to acquire a phase tracking reference signal through a first transmission resource, where the first transmission resource includes: at least one first OFDM symbol and a first subcarrier group located on each of the first OFDM symbols, where the first subcarrier group includes consecutive subcarriers;
  • a noise compensation processing module configured to perform phase noise compensation on the first time domain signal according to the phase tracking reference signal to obtain a compensated second time domain signal, the first time domain signal being the received
  • the time domain signal with the cyclic prefix removed from the OFDM symbols is the number of OFDM symbols in a slot.
  • an embodiment of the present disclosure further provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, implements the steps of the above-mentioned phase noise compensation method.
  • the phase tracking reference signal is obtained by using first transmission resources, where the first transmission resources include: at least one first OFDM symbol and a first subcarrier located on each of the first OFDM symbols group, the first subcarrier group includes continuous subcarriers; according to the phase tracking reference signal, phase noise compensation is performed on the first time domain signal to obtain a compensated second time domain signal, and the first time domain signal is received of The time domain signal with the cyclic prefix removed from the OFDM symbols, is the number of OFDM symbols in a time slot.
  • the phase tracking reference signal obtained through continuous subcarrier resources eliminates the influence of CPE and ICI on the data signal. Based on this, phase noise is performed on the first time domain signal. Compensation can further improve system performance.
  • FIG. 1 is a schematic flowchart of a phase noise compensation method according to an embodiment of the present disclosure
  • FIG. 2 is a schematic diagram of subcarrier resources used for transmitting a phase tracking reference signal PTRS according to an embodiment of the present disclosure
  • FIG. 3 is a schematic flowchart of an information transmission method according to an embodiment of the present disclosure.
  • FIG. 4 is a schematic structural diagram of a phase noise compensation apparatus according to an embodiment of the present disclosure.
  • FIG. 5 is a schematic block diagram of a bit noise compensation device according to an embodiment of the present disclosure.
  • FIG. 6 is a structural block diagram of an information transmission apparatus according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic block diagram of an information transmission apparatus according to an embodiment of the present disclosure.
  • the term “plurality” refers to two or more than two, and other quantifiers are similar.
  • a schematic flowchart of a phase noise compensation method provided by an embodiment of the present disclosure, the method includes:
  • Step 101 Obtain a phase tracking reference signal through a first transmission resource, where the first transmission resource includes: at least one first orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) symbol and a symbol located in each of the first a first subcarrier group on an OFDM symbol, the first subcarrier group including consecutive subcarriers;
  • OFDM Orthogonal Frequency Division Multiplexing
  • the number of the first OFDM symbols is represented by M PT-RS , then in, is the number of OFDM symbols in a slot, and M PT-RS is a positive integer.
  • the number of consecutive subcarriers included in the first subcarrier group is given by means, then is a positive integer.
  • Step 102 Perform phase noise compensation on the first time-domain signal according to the phase tracking reference signal to obtain a compensated second time-domain signal, where the first time-domain signal is received
  • the time domain signal with the cyclic prefix removed from the OFDM symbols, is the number of OFDM symbols in a slot.
  • FIG. 2 it is a schematic diagram of subcarrier resources used for transmitting a phase tracking reference signal PTRS according to an embodiment of the present disclosure.
  • M PT-RS first OFDM symbols among the OFDM symbols, on the first OFDM symbols PTRS is transmitted on consecutive subcarriers.
  • the consecutive subcarriers are block-shaped, and may also be referred to as block-shaped consecutive subcarriers.
  • the PTRS is configured on the consecutive subcarriers of the first OFDM symbol.
  • PTRS is distributed continuously in a block-like manner in the frequency domain. Since the frequency domain subcarriers for transmitting PTRS are continuous, the influence of ICI on the data signal can be effectively eliminated.
  • a phase tracking reference signal is obtained by using a first transmission resource, where the first transmission resource includes: at least one first OFDM symbol and a first subcarrier located on each of the first OFDM symbols group, the first subcarrier group includes continuous subcarriers; according to the phase tracking reference signal, phase noise compensation is performed on the first time domain signal to obtain a compensated second time domain signal, and the first time domain signal is received of The time domain signal with the cyclic prefix removed from the OFDM symbols, is the number of OFDM symbols in a time slot.
  • the phase tracking reference signal obtained through continuous subcarrier resources eliminates the influence of CPE and ICI on the data signal. Based on this, phase noise is performed on the first time domain signal. Compensation can further improve system performance.
  • the first subcarrier group has a first guard interval resource and a second guard interval resource;
  • the first guard interval resource includes continuous subcarriers, the position of the starting subcarrier of the first guard interval resource is adjacent to the position of the ending subcarrier of the first subcarrier group, and the first guard interval The number of consecutive subcarriers in the resource is greater than or equal to the number of consecutive subcarriers in the first subcarrier group;
  • the second guard interval resource includes continuous subcarriers, the position of the ending subcarrier of the second guard interval resource is adjacent to the position of the starting subcarrier of the first carrier group, and the second guard interval resource is continuous.
  • the number of subcarriers in the first subcarrier group is greater than or equal to the number of consecutive subcarriers in the first subcarrier group.
  • the number of consecutive subcarriers in the first guard interval resource is given by express, is a positive integer;
  • the number of consecutive subcarriers in the second guard interval resource is given by express, is a positive integer.
  • first subcarrier group in the frequency domain is not interfered by other subcarriers, in the first subcarrier group upper reservation of consecutive subcarriers (hereinafter referred to as intermediate resources) consecutive subcarriers (ie, the first guard interval resource), and at the same time, reserved in the lower part of the intermediate resource consecutive subcarriers.
  • intermediate resources consecutive subcarriers (ie, the first guard interval resource)
  • the first guard interval resource consecutive subcarriers
  • the first transmission resource is configured by the base station.
  • the number of subcarriers in the first subcarrier group and the location in the frequency domain are configured by the base station; the number of the first OFDM symbols and the location in the time domain are configured by the base station.
  • the base station may configure M PT-RS first OFDM symbols according to the preset time-domain density.
  • step 101 in this embodiment of the present disclosure may specifically include:
  • the phase tracking reference signal on the continuous subcarriers on the OFDM symbol configured with the phase tracking reference signal is obtained.
  • d i means The index number of the OFDM symbol.
  • step 102 in this embodiment of the present disclosure may specifically include:
  • the first OFDM symbol be M PT-RS
  • the phase tracking reference signal on the first OFDM symbol is denoted as The number of consecutive subcarriers is indivual.
  • This step can specifically include:
  • Phase tracking reference signal on consecutive subcarriers Perform channel equalization to obtain an equalized signal in, is the channel response on the time-frequency resource (d i ,k PT-RS +n);
  • the channel response on the time-frequency resource (d i , k PT-RS +n) can be obtained by performing channel estimation on the demodulation reference signal of the DMRS port associated with the PTRS port.
  • This step can specifically include:
  • the frequency domain phase noise response For the M PT-RS first OFDM symbols configured with block PTRS on each first OFDM symbol Frequency Domain Phase Noise Response on Consecutive Subcarriers
  • the frequency domain phase noise response of each OFDM symbol on its corresponding continuous subcarriers on the OFDM symbols may specifically include:
  • X 0 represents the time domain position of the first OFDM symbol.
  • Y 0 represents the frequency domain phase noise response of the first OFDM symbol.
  • the vector Y is obtained from X 0 , Y 0 , and X through linear interpolation.
  • the l-th element in vector Y is y l .
  • each OFDM symbol is in its corresponding Frequency-domain phase noise response on consecutive subcarriers.
  • subcarrier mapping relationship is:
  • This step can specifically include:
  • phase noise compensation is performed on the first time-domain signal to obtain a compensated second time-domain signal.
  • This step can specifically include:
  • a phase tracking reference signal is obtained by using a first transmission resource, where the first transmission resource includes: at least one first OFDM symbol and a first subcarrier located on each of the first OFDM symbols group, the first subcarrier group includes continuous subcarriers; according to the phase tracking reference signal, phase noise compensation is performed on the first time domain signal to obtain a compensated second time domain signal, and the first time domain signal is received of The time domain signal with the cyclic prefix removed from the OFDM symbols, is the number of OFDM symbols in a time slot.
  • the phase tracking reference signal obtained through continuous subcarrier resources eliminates the influence of CPE and ICI on the data signal. Based on this, phase noise is performed on the first time domain signal. Compensation can further improve system performance.
  • a schematic flowchart of an information transmission method provided by an embodiment of the present disclosure includes:
  • Step 301 Send a phase tracking reference signal through a first transmission resource
  • the first transmission resource includes: at least one first OFDM symbol and a first subcarrier group located on each of the first OFDM symbols, and the first subcarrier group includes consecutive subcarriers.
  • the number of the first OFDM symbols is represented by M PT-RS , then in, is the number of OFDM symbols in a slot, and M PT-RS is a positive integer.
  • the number of consecutive subcarriers included in the first subcarrier group is given by means, then is a positive integer.
  • this step may specifically include:
  • a phase tracking reference signal composed of a pseudo-random sequence is sent on consecutive subcarriers.
  • phase tracking reference signal consisting of a pseudo-random sequence can be obtained from represents, where k PT-RS is the starting sub-carrier position of the first sub-carrier group,
  • the phase tracking reference signal is sent by using first transmission resources, where the first transmission resources include: at least one first OFDM symbol and a first OFDM symbol located on each of the first OFDM symbols Subcarrier group, the first subcarrier group includes continuous subcarriers, so using continuous subcarrier resources to transmit phase tracking reference signals can simultaneously eliminate the influence of CPE and ICI on data signals and improve system performance.
  • the first subcarrier group has a first guard interval resource and a second guard interval resource;
  • the first guard interval resource includes continuous subcarriers, the position of the starting subcarrier of the first guard interval resource is adjacent to the position of the ending subcarrier of the first subcarrier group, and the first guard interval The number of consecutive subcarriers in the resource is greater than or equal to the number of consecutive subcarriers in the first subcarrier group;
  • the second guard interval resource includes continuous subcarriers, the position of the ending subcarrier of the second guard interval resource is adjacent to the position of the starting subcarrier of the first carrier group, and the second guard interval resource is continuous.
  • the number of subcarriers in the first subcarrier group is greater than or equal to the number of consecutive subcarriers in the first subcarrier group.
  • the number of consecutive subcarriers in the first guard interval resource is given by express, is a positive integer;
  • the number of consecutive subcarriers in the second guard interval resource is given by express, is a positive integer.
  • first subcarrier group in the frequency domain is not interfered by other subcarriers, in the first subcarrier group upper reservation of consecutive subcarriers (hereinafter referred to as intermediate resources) consecutive subcarriers (ie, the first guard interval resource), and at the same time, reserved in the lower part of the intermediate resource consecutive subcarriers (ie, the second guard interval resource).
  • intermediate resources consecutive subcarriers
  • the second guard interval resource reserved in the lower part of the intermediate resource consecutive subcarriers
  • the number of consecutive subcarriers in the first guard interval resource may or may not be equal to the number of consecutive subcarriers in the second guard interval resource.
  • the first transmission resource is configured by the base station.
  • the number of subcarriers in the first subcarrier group and the location in the frequency domain are configured by the base station; the number of the first OFDM symbols and the location in the time domain are configured by the base station.
  • the base station may configure M PT-RS first OFDM symbols according to the preset time-domain density.
  • the phase tracking reference signal is generated from a pseudo-random sequence.
  • a phase tracking reference signal is sent by using a first transmission resource, where the first transmission resource includes: at least one first OFDM symbol and a first sub-sub-signal located on each of the first OFDM symbols A carrier group.
  • the first subcarrier group includes continuous subcarriers.
  • an embodiment of the present disclosure further provides a phase noise compensation apparatus, the phase noise compensation apparatus is applied to a terminal, and includes: a memory 420, a transceiver 400, a processor 410, and a memory 420 for storing program instructions;
  • the transceiver 400 is used to send and receive data under the control of the processor 610;
  • the processor 410 is used to read program instructions in the memory 420 and perform the following operations:
  • the first transmission resource includes: at least one first OFDM symbol and a first subcarrier group located on each of the first OFDM symbols, the first subcarrier A group includes contiguous subcarriers;
  • phase noise compensation is performed on the first time domain signal to obtain a compensated second time domain signal, and the first time domain signal is the received
  • the time domain signal with the cyclic prefix removed from the OFDM symbols, is the number of OFDM symbols in a slot.
  • the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by processor 410 and various circuits of memory represented by memory 420 are linked together.
  • the bus architecture may also link together various other circuits, such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be described further herein.
  • the bus interface provides the interface.
  • Transceiver 400 may be a number of elements, ie, including a transmitter and a transceiver, providing a means for communicating with various other devices over a transmission medium.
  • the user interface 430 may also be an interface capable of externally connecting the required equipment, and the connected equipment includes but is not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.
  • the processor 410 is responsible for managing the bus architecture and general processing, and the memory 420 may store data used by the processor 410 in performing operations.
  • the processor 410 may be a central processing unit (central processing unit, CPU), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field-programmable gate array (Field-Programmable Gate Array, FPGA) or a complex programmable For a logic device (Complex Programmable Logic Device, CPLD), the processor 410 may also adopt a multi-core architecture.
  • CPU central processing unit
  • ASIC Application Specific Integrated Circuit
  • FPGA Field-Programmable Gate Array
  • CPLD Complex Programmable Logic Device
  • the processor 410 is configured to execute any of the methods provided in the embodiments of the present application according to the obtained executable instructions by calling the program instructions stored in the memory.
  • the processor 410 and the memory 420 may also be arranged physically separately.
  • the first subcarrier group has a first guard interval resource and a second guard interval resource
  • the first guard interval resource includes continuous subcarriers, the position of the starting subcarrier of the first guard interval resource is adjacent to the position of the ending subcarrier of the first subcarrier group, and the first guard interval The number of consecutive subcarriers in the resource is greater than or equal to the number of consecutive subcarriers in the first subcarrier group;
  • the second guard interval resource includes continuous subcarriers, the position of the ending subcarrier of the second guard interval resource is adjacent to the position of the starting subcarrier of the first carrier group, and the second guard interval resource is continuous.
  • the number of subcarriers in the first subcarrier group is greater than or equal to the number of consecutive subcarriers in the first subcarrier group.
  • the first transmission resource is configured by the base station.
  • the processor 410 specifically includes:
  • the phase tracking reference signal on the continuous subcarriers on the OFDM symbol configured with the phase tracking reference signal is obtained.
  • the processor 410 specifically includes:
  • phase noise compensation is performed on the first time-domain signal to obtain a compensated second time-domain signal.
  • the processor 410 specifically includes:
  • the processor 410 specifically includes:
  • the processor 410 specifically includes:
  • the frequency domain phase noise response is mapped into a vector T, where the vector N FFT is the Fourier transform order;
  • the phase noise compensation apparatus obtains a phase tracking reference signal by using a first transmission resource, where the first transmission resource includes: at least one first OFDM symbol and a first subcarrier located on each of the first OFDM symbols group, the first subcarrier group includes continuous subcarriers; according to the phase tracking reference signal, phase noise compensation is performed on the first time domain signal to obtain a compensated second time domain signal, and the first time domain signal is received of The time domain signal with the cyclic prefix removed from the OFDM symbols, is the number of OFDM symbols in a time slot.
  • the phase tracking reference signal obtained through continuous subcarrier resources eliminates the influence of CPE and ICI on the data signal. Based on this, phase noise is performed on the first time domain signal. Compensation can further improve system performance.
  • the implementation of the present disclosure further provides a phase noise compensation device, including:
  • An obtaining module 501 configured to obtain a phase tracking reference signal through a first transmission resource, where the first transmission resource includes: at least one first OFDM symbol and a first subcarrier group located on each of the first OFDM symbols, the first subcarrier group includes consecutive subcarriers;
  • a noise compensation processing module 502 configured to perform phase noise compensation on the first time domain signal according to the phase tracking reference signal, to obtain a compensated second time domain signal, the first time domain signal is the received
  • the time domain signal with the cyclic prefix removed from the OFDM symbols, is the number of OFDM symbols in a slot.
  • the first subcarrier group has a first guard interval resource and a second guard interval resource
  • the first guard interval resource includes continuous subcarriers, the position of the starting subcarrier of the first guard interval resource is adjacent to the position of the ending subcarrier of the first subcarrier group, and the first guard interval The number of consecutive subcarriers in the resource is greater than or equal to the number of consecutive subcarriers in the first subcarrier group;
  • the second guard interval resource includes continuous subcarriers, the position of the ending subcarrier of the second guard interval resource is adjacent to the position of the starting subcarrier of the first carrier group, and the second guard interval resource is continuous.
  • the number of subcarriers in the first subcarrier group is greater than or equal to the number of consecutive subcarriers in the first subcarrier group.
  • the first transmission resource is configured by the base station.
  • the obtaining module 501 includes:
  • a first obtaining unit configured to obtain, through a first transmission resource, a cyclic prefix-removed time domain signal of an OFDM symbol configured with a phase tracking reference signal, where the first OFDM symbol is an OFDM symbol configured with a phase tracking reference signal;
  • a first processing unit configured to transform the time-domain signal into a frequency-domain signal through Fourier transform
  • the second obtaining unit is configured to obtain, according to the frequency domain signal, the phase tracking reference signal on the continuous subcarriers on the OFDM symbol configured with the phase tracking reference signal.
  • the noise compensation processing module 502 includes:
  • a third acquiring unit configured to acquire the frequency domain phase noise response of the phase tracking reference signal on each of the first OFDM symbols on the at least one first OFDM symbol on the corresponding continuous subcarriers
  • a second processing unit configured to obtain based on the frequency domain phase noise response time-domain phase noise response at consecutive sampling points over OFDM symbols
  • a first calculation unit configured to calculate based on the time-domain phase noise response to obtain time-domain phase noise at each sampling point on OFDM symbols
  • the noise compensation processing unit is configured to perform phase noise compensation on the first time domain signal according to the time domain phase noise of each sampling point to obtain a compensated second time domain signal.
  • the third obtaining unit is specifically used for:
  • the second processing unit is specifically used for:
  • the second processing unit is also specifically used for:
  • the frequency domain phase noise response is mapped into a vector T, where the vector N FFT is the Fourier transform order;
  • the phase noise compensation apparatus obtains a phase tracking reference signal by using a first transmission resource, where the first transmission resource includes: at least one first OFDM symbol and a first subcarrier located on each of the first OFDM symbols group, the first subcarrier group includes continuous subcarriers; according to the phase tracking reference signal, phase noise compensation is performed on the first time domain signal to obtain a compensated second time domain signal, and the first time domain signal is received of The time domain signal with the cyclic prefix removed from the OFDM symbols, is the number of OFDM symbols in a time slot.
  • the phase tracking reference signal obtained through continuous subcarrier resources eliminates the influence of CPE and ICI on the data signal. Based on this, phase noise is performed on the first time domain signal. Compensation can further improve system performance.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • the above-mentioned integrated units can be realized in the form of hardware, and can also be realized in the form of software functional units.
  • the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a processor-readable storage medium.
  • the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the related technology, or all or part of the technical solution, and the computer software product is stored in a storage medium.
  • a computer device which may be a personal computer, a server, or a network device, etc.
  • a processor processor
  • the aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program codes .
  • a processor-readable storage medium stores program instructions, and the program instructions are used to cause the processor to perform the following steps:
  • the first transmission resource includes: at least one first OFDM symbol and a first subcarrier group located on each of the first OFDM symbols, the first subcarrier A group includes contiguous subcarriers;
  • phase noise compensation is performed on the first time domain signal to obtain a compensated second time domain signal, and the first time domain signal is the received
  • the time domain signal with the cyclic prefix removed from the OFDM symbols, is the number of OFDM symbols in a slot.
  • an embodiment of the present disclosure further provides an information transmission apparatus.
  • the information transmission apparatus is applied to a terminal or a network side device (such as a base station), including: a memory 620 , a transceiver 600 , a processor 610 : a memory 620 , is used to store computer programs; the transceiver 600 is used to send and receive data under the control of the processor 610; the processor 610 is used to read the computer program in the memory 620, and the transceiver 600 performs the following operations :
  • the first transmission resource includes: at least one first OFDM symbol and a first subcarrier group located on each of the first OFDM symbols, and the first subcarrier group includes consecutive subcarriers.
  • the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by the processor 610 and a memory represented by the memory 620
  • the various circuits are linked together.
  • the bus architecture may also link together various other circuits, such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be described further herein.
  • the bus interface provides the interface.
  • Transceiver 600 may be a number of elements, including a transmitter and a transceiver, providing a means for communicating with various other devices over a transmission medium.
  • the user interface may also be an interface capable of externally connecting the required equipment, and the connected equipment includes but is not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.
  • the processor 610 is responsible for managing the bus architecture and general processing, and the memory 620 may store data used by the processor 610 in performing operations.
  • the processor 610 may be a CPU, an ASIC, an FPGA or a CPLD, and the processor 610 may also adopt a multi-core architecture.
  • the processor 610 is configured to execute any of the methods provided in the embodiments of the present application according to the obtained executable instructions by calling the program instructions stored in the memory.
  • the processor 610 and the memory 620 may also be arranged physically separately.
  • the bus architecture may include any number of interconnected buses and bridges, specifically various circuit links of one or more processors represented by the processor 610 and a memory represented by the memory 620 together.
  • the bus architecture may also link together various other circuits, such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be described further herein.
  • the bus interface provides the interface.
  • Transceiver 600 may be multiple elements, ie, including a transmitter and a receiver, providing means for communicating with various other devices over transmission media including wireless channels, wired channels, fiber optic cables, and the like.
  • the processor 610 is responsible for managing the bus architecture and general processing, and the memory 620 may store data used by the processor 610 in performing operations.
  • the first subcarrier group has a first guard interval resource and a second guard interval resource
  • the first guard interval resource includes continuous subcarriers, the position of the starting subcarrier of the first guard interval resource is adjacent to the position of the ending subcarrier of the first subcarrier group, and the first guard interval The number of consecutive subcarriers in the resource is greater than or equal to the number of consecutive subcarriers in the first subcarrier group;
  • the second guard interval resource includes continuous subcarriers, the position of the ending subcarrier of the second guard interval resource is adjacent to the position of the starting subcarrier of the first carrier group, and the second guard interval resource is continuous.
  • the number of subcarriers in the first subcarrier group is greater than or equal to the number of consecutive subcarriers in the first subcarrier group.
  • the first transmission resource is configured by the base station.
  • the phase tracking reference signal is generated by a pseudo-random sequence.
  • the information transmission apparatus transmits a phase tracking reference signal by using a first transmission resource, where the first transmission resource includes: at least one first OFDM symbol and a first sub-subframe located on each of the first OFDM symbols A carrier group.
  • the first subcarrier group includes continuous subcarriers.
  • an embodiment of the present disclosure further provides an information transmission device, including:
  • the first transmission resource includes: at least one first OFDM symbol and a first subcarrier group located on each of the first OFDM symbols, and the first subcarrier group includes consecutive subcarriers.
  • the first subcarrier group has a first guard interval resource and a second guard interval resource
  • the first guard interval resource includes continuous subcarriers, the position of the starting subcarrier of the first guard interval resource is adjacent to the position of the ending subcarrier of the first subcarrier group, and the first guard interval The number of consecutive subcarriers in the resource is greater than or equal to the number of consecutive subcarriers in the first subcarrier group;
  • the second guard interval resource includes continuous subcarriers, the position of the ending subcarrier of the second guard interval resource is adjacent to the position of the starting subcarrier of the first carrier group, and the second guard interval resource is continuous.
  • the number of subcarriers in the first subcarrier group is greater than or equal to the number of consecutive subcarriers in the first subcarrier group.
  • the first transmission resource is configured by the base station.
  • the phase tracking reference signal is generated from a pseudo-random sequence.
  • the information transmission apparatus transmits a phase tracking reference signal by using a first transmission resource, where the first transmission resource includes: at least one first OFDM symbol and a first sub-subframe located on each of the first OFDM symbols A carrier group.
  • the first subcarrier group includes continuous subcarriers.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • the above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.
  • the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a processor-readable storage medium.
  • the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the related technology, or all or part of the technical solution, and the computer software product is stored in a storage medium.
  • a computer device which may be a personal computer, a server, or a network device, etc.
  • a processor processor
  • the aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program codes .
  • a processor-readable storage medium stores program instructions, and the program instructions are used to cause the processor to perform the following steps:
  • the first transmission resource includes: at least one first OFDM symbol and a first subcarrier group located on each of the first OFDM symbols, and the first subcarrier group includes consecutive subcarriers.
  • 5th Generation 5th Generation
  • applicable systems may be Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) general packet Wireless service (General Packet Radio Service, GPRS) system, Long Term Evolution (Long Term Evolution, LTE) system, LTE Frequency Division Duplex (Frequency Division Duplex, FDD) system, LTE Time Division Duplex (Time Division Duplex, TDD) system, Long Term Evolution Advanced (LTE-A) system, Universal Mobile Telecommunication System (UMTS), Worldwide interoperability for Microwave Access (WiMAX) system, 5G New Radio (New Radio, NR) system, etc.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • LTE Frequency Division Duplex Frequency Division Duplex
  • FDD Frequency Division Duplex
  • Time Division Duplex Time Division Duplex
  • the terminal device involved in the embodiments of the present application may be a device that provides voice and/or data connectivity to a user, a handheld device with a wireless connection function, or other processing device connected to a wireless modem.
  • the name of the terminal device may be different.
  • the terminal device may be called user equipment (User Equipment, UE).
  • Wireless terminal equipment can communicate with one or more core networks (Core Network, CN) via a radio access network (Radio Access Network, RAN).
  • RAN Radio Access Network
  • "telephone) and computers with mobile terminal equipment eg portable, pocket-sized, hand-held, computer-built or vehicle-mounted mobile devices, which exchange language and/or data with the radio access network.
  • Wireless terminal equipment may also be referred to as system, subscriber unit, subscriber station, mobile station, mobile station, remote station, access point , a remote terminal device (remote terminal), an access terminal device (access terminal), a user terminal device (user terminal), a user agent (user agent), and a user device (user device), which are not limited in the embodiments of the present application.
  • the network device involved in the embodiments of the present application may be a base station, and the base station may include a plurality of cells providing services for the terminal.
  • the base station may also be called an access point, or may be a device in the access network that communicates with wireless terminal equipment through one or more sectors on the air interface, or other names.
  • the network device can be used to exchange received air frames with Internet Protocol (IP) packets, and act as a router between the wireless terminal device and the rest of the access network, which can include the Internet. Protocol (IP) communication network.
  • IP Internet Protocol
  • the network devices may also coordinate attribute management for the air interface.
  • the network device involved in the embodiments of the present application may be a network device (Base Transceiver Station, BTS) in the Global System for Mobile Communications (GSM) or Code Division Multiple Access (Code Division Multiple Access, CDMA). ), it can also be a network device (NodeB) in Wide-band Code Division Multiple Access (WCDMA), or it can be an evolved network device in a Long Term Evolution (LTE) system (evolutional Node B, eNB or e-NodeB), 5G base station (gNB) in 5G network architecture (next generation system), or Home evolved Node B (HeNB), relay node (relay node) , a home base station (femto), a pico base station (pico), etc., which are not limited in the embodiments of the present application.
  • the network device may include a centralized unit (Centralized Unit, CU) node and a distributed unit (Distributed Unit, DU) node, and the centralized unit and the distributed unit may
  • MIMO transmission can be single-user MIMO (Single User MIMO, SU-MIMO) or multi-user MIMO. (Multiple User MIMO, MU-MIMO).
  • MIMO transmission can be two-dimensional MIMO (two dimensional-MIMO, 2D-MIMO), three-dimensional MIMO (three dimensional-MIMO, 3D-MIMO), full-dimensional MIMO (full dimensional-MIMO, FD-MIMO) MIMO) or massive-MIMO, it can also be diversity transmission or precoding transmission or beamforming transmission, etc.
  • the embodiments of the present application may be provided as a method, a system, or a computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media having computer-usable program code embodied therein, including but not limited to disk storage, optical storage, and the like.
  • processor-executable instructions may also be stored in a processor-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a particular manner, such that the instructions stored in the processor-readable memory result in the manufacture of means including the instructions product, the instruction means implements the functions specified in the flow or flow of the flowchart and/or the block or blocks of the block diagram.
  • processor-executable instructions can also be loaded onto a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process that Execution of the instructions provides steps for implementing the functions specified in the flowchart or blocks and/or the block or blocks of the block diagrams.
  • the disclosed apparatus and method may be implemented in other manners.
  • the apparatus embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.
  • each functional unit in each embodiment of the present disclosure may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM) or a random access memory (Random Access Memory, RAM) and the like.
  • modules, units, and sub-units can be implemented in one or more Application Specific Integrated Circuits (ASIC), Digital Signal Processor (DSP), Digital Signal Processing Device (DSP Device, DSPD) ), Programmable Logic Device (PLD), Field-Programmable Gate Array (FPGA), general-purpose processor, controller, microcontroller, microprocessor, in other electronic units or combinations thereof.
  • ASIC Application Specific Integrated Circuits
  • DSP Digital Signal Processor
  • DSP Device Digital Signal Processing Device
  • DSPD Digital Signal Processing Device
  • PLD Programmable Logic Device
  • FPGA Field-Programmable Gate Array
  • the technologies described in the embodiments of the present disclosure may be implemented through modules (eg, procedures, functions, etc.) that perform the functions described in the embodiments of the present disclosure.
  • Software codes may be stored in memory and executed by a processor.
  • the memory can be implemented in the processor or external to the processor.

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Abstract

本公开提供一种相位噪声补偿方法及装置。本公开的相位噪声补偿方法包括:通过第一传输资源,获取相位跟踪参考信号,第一传输资源包括:至少一个第一OFDM符号以及位于每个第一OFDM符号上的第一子载波组,第一子载波组包括连续的子载波;根据相位跟踪参考信号,对第一时域信号进行相位噪声补偿,得到补偿后的第二时域信号。

Description

相位噪声补偿方法及装置
相关申请的交叉引用
本申请主张在2020年9月29日在中国提交的中国专利申请号No.202011053354.4的优先权,其全部内容通过引用包含于此。
技术领域
本公开涉及通信技术领域,尤其涉及一种相位噪声补偿方法及装置。
背景技术
相位噪声来自于发射机与接收机中的本地振荡器,其对于多载波信号的传输将产生影响。而在高频段(6GHz以上),相位噪声的影响将更加严重,需要对接收信号进行相位噪声的补偿以保证系统性能。相位噪声对于数据信号的影响主要有两个方面:一是公共相位噪声误差(Common Phase Error,CPE),此时,每一个子载波都有一个共同的相位旋转,二是子载波间的干扰(Inter-Carrier Interference,ICI)。随着射频频率的增加,比如52.6-70GHz,相位噪声对于高调制和编码方案(Modulation and coding scheme,MCS)等级的影响越来越明显。
相关技术的第三代合作伙伴项目(3rd Generation Partnership Project,3GPP)标准中,在频域定义了梳状(或称栅状)传输资源用于相位跟踪参考信号(Phase-tracking reference signal,PTRS)的传输,但是梳状传输资源仅考虑用于消除CPE对于数据信号的影响,并不能有效地消除ICI对于数据信号的影响。随着载波频率越来越高,只消除CPE对于数据信号的影响是不足的,此时消除ICI对于数据信号的影响成为一个亟待解决的问题。
发明内容
本公开的目的在于提供一种相位噪声补偿方法及装置,用以解决相关技术中频域上的梳状传输资源无法同时消除CPE和ICI对于数据信号的影响的问题。
为了实现上述目的,本公开实施例提供一种相位噪声补偿方法,包括:
通过第一传输资源,获取相位跟踪参考信号,所述第一传输资源包括:至少一个第一OFDM符号以及位于每个所述第一OFDM符号上的第一子载波组,所述第一子载波组包括连续的子载波;
根据所述相位跟踪参考信号,对第一时域信号进行相位噪声补偿,得到补偿后的第二时域信号,所述第一时域信号为接收到的
Figure PCTCN2021120196-appb-000001
个OFDM符号上去除循环前缀的时域信号,
Figure PCTCN2021120196-appb-000002
为一个时隙的OFDM符号个数。
其中,所述第一子载波组具有第一保护间隔资源和第二保护间隔资源;
其中,所述第一保护间隔资源包括连续的子载波,所述第一保护间隔资源的起始子载波位置与所述第一子载波组的结束子载波位置相邻,所述第一保护间隔资源中连续的子载波个数大于或者等于所述第一子载波组中的连续的子载波个数;
所述第二保护间隔资源包括连续的子载波,所述第二保护间隔资源的结束子载波位置与所述第一载波组的起始子载波位置相邻,所述第二保护间隔资源中连续的子载波个数大于或者等于所述第一子载波组中的连续的子载波个数。
其中,所述第一传输资源由基站配置。
其中,所述通过第一传输资源,获取相位跟踪参考信号,包括:
执行以下步骤,直至得到至少一个第一OFDM符号的每个第一OFDM符号上的相位跟踪参考信号;
通过第一传输资源,获取所述第一OFDM符号的去除循环前缀的时域信号,所述第一OFDM符号为配置有相位跟踪参考信号的OFDM符号;
通过傅里叶变换,将所述时域信号变换为频域信号;
根据所述频域信号,获取所述第一OFDM符号上的连续的子载波上的相位跟踪参考信号。
其中,所述根据所述相位跟踪参考信号,对第一时域信号进行相位噪声补偿,得到补偿后的第二时域信号,包括:
获取至少一个第一OFDM符号上的每个第一OFDM符号上的相位跟踪参考信号在其对应的连续的子载波上的频域相位噪声响应;
基于所述频域相位噪声响应,得到
Figure PCTCN2021120196-appb-000003
个OFDM符号上的连续抽样点上的时域相位噪声响应;
基于所述时域相位噪声响应,计算得到
Figure PCTCN2021120196-appb-000004
个OFDM符号上的每个抽样点的时域相位噪声;
根据每个抽样点的时域相位噪声,对第一时域信号进行相位噪声补偿,得到补偿后的第二时域信号。
其中,获取至少一个第一OFDM符号上的每个第一OFDM符号上的相位跟踪参考信号在其对应的连续的子载波上的频域相位噪声响应,包括:
执行以下步骤,直至获取至少一个第一OFDM符号上的每个第一OFDM符号上的相位跟踪参考信号在其对应的连续的子载波上的频域相位噪声响应:
对位于所述第一OFDM符号上的连续的子载波上的相位跟踪参考信号进行信道均衡,得到均衡后的信号,所述第一OFDM符号为配置有相位跟踪参考信号的OFDM符号;
根据均衡后的信号,得到频域相位噪声响应。
其中,所述基于所述频域相位噪声响应,得到
Figure PCTCN2021120196-appb-000005
个OFDM符号上的连续抽样点上的时域相位噪声响应,包括:
根据所述频域相位噪声响应,通过线性插值处理,得到
Figure PCTCN2021120196-appb-000006
个OFDM符号上每个OFDM符号在其对应的连续的子载波上的频域相位噪声响应;
基于
Figure PCTCN2021120196-appb-000007
个OFDM符号上每个OFDM符号在其对应的连续的子载波上的频域相位噪声响应,生成
Figure PCTCN2021120196-appb-000008
个OFDM符号上的连续抽样点上的时域相位噪声响应。
其中,所述基于
Figure PCTCN2021120196-appb-000009
个OFDM符号上每个OFDM符号在其对应的连续的子载波上的频域相位噪声响应,生成
Figure PCTCN2021120196-appb-000010
个OFDM符号上的连续抽样点上的时域相位噪声响应,包括:
通过子载波映射关系,将所述频域相位噪声响应映射到矢量T中,其中,矢量
Figure PCTCN2021120196-appb-000011
N FFT为傅里叶变换阶数;
对矢量T进行离散傅里叶逆变换,得到矢量S,其中,矢量
Figure PCTCN2021120196-appb-000012
将矢量S中的元素作为
Figure PCTCN2021120196-appb-000013
个OFDM符号上的连续抽样点上的时域相位 噪声响应。
为了实现上述目的,本公开实施例提供了一种相位噪声补偿装置,包括:存储器、收发机,处理器:存储器,用于存储程序指令;收发机,用于在所述处理器的控制下收发数据;处理器,用于读取所述存储器中的程序指令并执行以下操作:
通过第一传输资源,获取相位跟踪参考信号,所述第一传输资源包括:至少一个第一OFDM符号以及位于每个所述第一OFDM符号上的第一子载波组,所述第一子载波组包括连续的子载波;
根据所述相位跟踪参考信号,对第一时域信号进行相位噪声补偿,得到补偿后的第二时域信号,所述第一时域信号为接收到的
Figure PCTCN2021120196-appb-000014
个OFDM符号上去除循环前缀的时域信号,
Figure PCTCN2021120196-appb-000015
为一个时隙的OFDM符号个数。
其中,所述第一子载波组具有第一保护间隔资源和第二保护间隔资源;
其中,所述第一保护间隔资源包括连续的子载波,所述第一保护间隔资源的起始子载波位置与所述第一子载波组的结束子载波位置相邻,所述第一保护间隔资源中连续的子载波个数大于或者等于所述第一子载波组中的连续的子载波个数;
所述第二保护间隔资源包括连续的子载波,所述第二保护间隔资源的结束子载波位置与所述第一载波组的起始子载波位置相邻,所述第二保护间隔资源中连续的子载波个数大于或者等于所述第一子载波组中的连续的子载波个数。
其中,所述第一传输资源由基站配置。
其中,所述处理器,具体包括:
执行以下步骤,直至得到至少一个第一OFDM符号的每个第一OFDM符号上的相位跟踪参考信号;
通过第一传输资源,获取所述第一OFDM符号的去除循环前缀的时域信号,所述第一OFDM符号为配置有相位跟踪参考信号的OFDM符号;
通过傅里叶变换,将所述时域信号变换为频域信号;
根据所述频域信号,获取所述第一OFDM符号上的连续的子载波上的相位跟踪参考信号。
其中,所述处理器,具体包括:
获取至少一个第一OFDM符号上的每个第一OFDM符号上的相位跟踪参考信号在其对应的连续的子载波上的频域相位噪声响应;
基于所述频域相位噪声响应,得到
Figure PCTCN2021120196-appb-000016
个OFDM符号上的连续抽样点上的时域相位噪声响应;
基于所述时域相位噪声响应,计算得到
Figure PCTCN2021120196-appb-000017
个OFDM符号上的每个抽样点的时域相位噪声;
根据每个抽样点的时域相位噪声,对第一时域信号进行相位噪声补偿,得到补偿后的第二时域信号。
其中,所述处理器,具体包括:
执行以下步骤,直至获取至少一个第一OFDM符号上的每个第一OFDM符号上的相位跟踪参考信号在其对应的连续的子载波上的频域相位噪声响应:
对位于所述第一OFDM符号上的连续的子载波上的相位跟踪参考信号进行信道均衡,得到均衡后的信号,所述第一OFDM符号为配置有相位跟踪参考信号的OFDM符号;
根据均衡后的信号,得到频域相位噪声响应。
其中,所述处理器,具体包括:
根据所述频域相位噪声响应,通过线性插值处理,得到
Figure PCTCN2021120196-appb-000018
个OFDM符号上每个OFDM符号在其对应的连续的子载波上的频域相位噪声响应;
基于
Figure PCTCN2021120196-appb-000019
个OFDM符号上每个OFDM符号在其对应的连续的子载波上的频域相位噪声响应,生成
Figure PCTCN2021120196-appb-000020
个OFDM符号上的连续抽样点上的时域相位噪声响应。
其中,所述处理器,具体包括:
通过子载波映射关系,将所述频域相位噪声响应映射到矢量T中,其中,矢量
Figure PCTCN2021120196-appb-000021
N FFT为傅里叶变换阶数;
对矢量T进行离散傅里叶逆变换,得到矢量S,其中,矢量
Figure PCTCN2021120196-appb-000022
将矢量S中的元素作为
Figure PCTCN2021120196-appb-000023
个OFDM符号上的连续抽样点上的时域相位噪声响应。
为了实现上述目的,本公开实施例还提供了一种相位噪声补偿装置,包括:
获取模块,用于通过第一传输资源,获取相位跟踪参考信号,所述第一传输资源包括:至少一个第一OFDM符号以及位于每个所述第一OFDM符号上的第一子载波组,所述第一子载波组包括连续的子载波;
噪声补偿处理模块,用于根据所述相位跟踪参考信号,对第一时域信号进行相位噪声补偿,得到补偿后的第二时域信号,所述第一时域信号为接收到的
Figure PCTCN2021120196-appb-000024
个OFDM符号上去除循环前缀的时域信号,
Figure PCTCN2021120196-appb-000025
为一个时隙的OFDM符号个数。
为了实现上述目的,本公开实施例还提供一种计算机可读存储介质,其上存储有计算机程序,该计算机程序被处理器执行时实现如上述所述的相位噪声补偿方法的步骤。
本公开的上述技术方案至少具有如下有益效果:
本公开实施例的上述技术方案中,通过第一传输资源,获取相位跟踪参考信号,第一传输资源包括:至少一个第一OFDM符号以及位于每个所述第一OFDM符号上的第一子载波组,所述第一子载波组包括连续的子载波;根据相位跟踪参考信号,对第一时域信号进行相位噪声补偿,得到补偿后的第二时域信号,第一时域信号为接收到的
Figure PCTCN2021120196-appb-000026
个OFDM符号上去除循环前缀的时域信号,
Figure PCTCN2021120196-appb-000027
为一个时隙的OFDM符号个数,如此,通过连续的子载波资源获取到的相位跟踪参考信号,同时消除了CPE和ICI对于数据信号的影响,基于此,对第一时域信号进行相位噪声补偿,能够进一步提升系统性能。
附图说明
图1为本公开实施例的相位噪声补偿方法的流程示意图;
图2为本公开实施例的用于传输相位跟踪参考信号PTRS的子载波资源示意图;
图3为本公开实施例的信息传输方法的流程示意图;
图4为本公开实施例的相位噪声补偿装置的结构示意图;
图5为本公开实施例的位噪声补偿装置的模块示意图;
图6为本公开实施例的信息传输装置的结构框图;
图7为本公开实施例的信息传输装置的模块示意图。
具体实施方式
本申请实施例中术语“多个”是指两个或两个以上,其它量词与之类似。
下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本申请一部分实施例,并不是全部的实施例。基于本申请中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本申请保护的范围。
如图1所示,为本公开实施例提供的一种相位噪声补偿方法的流程示意图,该方法包括:
步骤101,通过第一传输资源,获取相位跟踪参考信号,所述第一传输资源包括:至少一个第一正交频分复用(Orthogonal Frequency Division Multiplexing,OFDM)符号以及位于每个所述第一OFDM符号上的第一子载波组,所述第一子载波组包括连续的子载波;
这里,第一OFDM符号的个数由M PT-RS表示,则
Figure PCTCN2021120196-appb-000028
其中,
Figure PCTCN2021120196-appb-000029
为一个时隙的OFDM符号个数,M PT-RS为正整数。
第一子载波组所包括的连续的子载波个数由
Figure PCTCN2021120196-appb-000030
表示,则
Figure PCTCN2021120196-appb-000031
Figure PCTCN2021120196-appb-000032
为正整数。
步骤102,根据所述相位跟踪参考信号,对第一时域信号进行相位噪声补偿,得到补偿后的第二时域信号,所述第一时域信号为接收到的
Figure PCTCN2021120196-appb-000033
个OFDM符号上去除循环前缀的时域信号,
Figure PCTCN2021120196-appb-000034
为一个时隙的OFDM符号个数。
如图2所示,为本公开实施例的用于传输相位跟踪参考信号PTRS的子载波资源示意图。
由图2可知,
Figure PCTCN2021120196-appb-000035
个OFDM符号中的M PT-RS个第一OFDM符号,在位于第一OFDM符号上的
Figure PCTCN2021120196-appb-000036
个连续的子载波上传输PTRS。即,
Figure PCTCN2021120196-appb-000037
个连续的子载波呈块状,也可称为块状连续子载波。也可以理解为,第一OFDM符号的连续的子载波上配置有PTRS。PTRS在频域是块状连续分布的。由于传输PTRS的频域子载波是连续的,能够有效消除ICI对数据信号的影响。
本公开实施例的相位噪声补偿方法,通过第一传输资源,获取相位跟踪 参考信号,第一传输资源包括:至少一个第一OFDM符号以及位于每个所述第一OFDM符号上的第一子载波组,所述第一子载波组包括连续的子载波;根据相位跟踪参考信号,对第一时域信号进行相位噪声补偿,得到补偿后的第二时域信号,第一时域信号为接收到的
Figure PCTCN2021120196-appb-000038
个OFDM符号上去除循环前缀的时域信号,
Figure PCTCN2021120196-appb-000039
为一个时隙的OFDM符号个数,如此,通过连续的子载波资源获取到的相位跟踪参考信号,同时消除了CPE和ICI对于数据信号的影响,基于此,对第一时域信号进行相位噪声补偿,能够进一步提升系统性能。
为了保证频域上的第一子载波组不受其他子载波的干扰,如图2所示,进一步地,所述第一子载波组具有第一保护间隔资源和第二保护间隔资源;
其中,所述第一保护间隔资源包括连续的子载波,所述第一保护间隔资源的起始子载波位置与所述第一子载波组的结束子载波位置相邻,所述第一保护间隔资源中连续的子载波个数大于或者等于所述第一子载波组中的连续的子载波个数;
所述第二保护间隔资源包括连续的子载波,所述第二保护间隔资源的结束子载波位置与所述第一载波组的起始子载波位置相邻,所述第二保护间隔资源中连续的子载波个数大于或者等于所述第一子载波组中的连续的子载波个数。
这里,第一保护间隔资源中连续的子载波个数由
Figure PCTCN2021120196-appb-000040
表示,
Figure PCTCN2021120196-appb-000041
为正整数;第二保护间隔资源中连续的子载波个数由
Figure PCTCN2021120196-appb-000042
表示,
Figure PCTCN2021120196-appb-000043
为正整数。即
Figure PCTCN2021120196-appb-000044
需要说明的是,为了保证频域上的第一子载波组不受其他子载波的干扰,在第一子载波组中
Figure PCTCN2021120196-appb-000045
个连续的子载波(下文称为中间资源)的上部预留
Figure PCTCN2021120196-appb-000046
个连续的子载波(即第一保护间隔资源),同时,在中间资源的下部预留
Figure PCTCN2021120196-appb-000047
个连续的子载波。这里,在第一保护间隔资源和第二保护间隔资源上均不发送任何信号。
可选地,所述第一传输资源由基站配置。
具体的,第一子载波组内的子载波个数以及所在频域位置由基站配置;所述第一OFDM符号的个数以及所在时域位置由基站配置。
需要说明的是,基站可按照预设时域密度配置M PT-RS个第一OFDM符号。
作为一可选地实现方式,本公开实施例的步骤101可具体包括:
执行以下步骤,直至得到至少一个第一OFDM符号的每个第一OFDM符号上的相位跟踪参考信号;
通过第一传输资源,获取配置有相位跟踪参考信号的OFDM符号的去除循环前缀的时域信号,所述第一OFDM符号为配置有相位跟踪参考信号的OFDM符号;
通过傅里叶变换,将所述时域信号变换为频域信号;
根据所述频域信号,获取配置有相位跟踪参考信号的OFDM符号上的连续的子载波上的相位跟踪参考信号。
下面通过一示例详述上述步骤。
首先,接收
Figure PCTCN2021120196-appb-000048
个OFDM符号上去除循环前缀的时域信号。
然后,通过第一传输资源,从接收到的
Figure PCTCN2021120196-appb-000049
个OFDM符号上去除循环前缀的时域信号中获取第d i个OFDM符号的去除循环前缀的时域信号
Figure PCTCN2021120196-appb-000050
其中,
Figure PCTCN2021120196-appb-000051
i=0,1,…M PT-RS-1,z=0,…,N FFT-1,N FFT为傅里叶变换阶数,第d i个OFDM符号为所述M PT-RS个第一OFDM符号中的一者。
这里,d i表示
Figure PCTCN2021120196-appb-000052
个OFDM符号的索引号。
接着,通过傅里叶变换FFT变换,将时域信号
Figure PCTCN2021120196-appb-000053
变换为频域信号
Figure PCTCN2021120196-appb-000054
最后,根据所述频域信号
Figure PCTCN2021120196-appb-000055
获取第d i个OFDM符号上的
Figure PCTCN2021120196-appb-000056
个连续的子载波上的相位跟踪参考信号
Figure PCTCN2021120196-appb-000057
k PT-RS为第一子载波组的起始子载波位置。
作为一可选地实现方式,本公开实施例的步骤102可具体包括:
获取至少一个第一OFDM符号上的每个第一OFDM符号上的相位跟踪参考信号在其对应的连续的子载波上的频域相位噪声响应;
这里,设第一OFDM符号为M PT-RS个,第一OFDM符号上的相位跟踪参考信号记为
Figure PCTCN2021120196-appb-000058
连续的子载波的个数为
Figure PCTCN2021120196-appb-000059
个。
获取M PT-RS个第一OFDM符号上的每个第一OFDM符号上的相位跟踪参考信号
Figure PCTCN2021120196-appb-000060
在其对应的
Figure PCTCN2021120196-appb-000061
个连续的子载波上的频域相位噪声响应
Figure PCTCN2021120196-appb-000062
i=0,1,…M PT-RS-1,
Figure PCTCN2021120196-appb-000063
k PT-RS为第一子载波组的起始子载波位置。
本步骤可具体包括:
执行以下步骤,直至获取至少一个第一OFDM符号上的每个第一OFDM符号上的相位跟踪参考信号在其对应的连续的子载波上的频域相位噪声响应:
对位于配置有相位跟踪参考信号的OFDM符号上的连续的子载波上的相位跟踪参考信号进行信道均衡,得到均衡后的信号,所述第一OFDM符号为配置有相位跟踪参考信号的OFDM符号;
根据均衡后的信号,得到频域相位噪声响应。
下面通过一示例详述上述步骤。
根据公式
Figure PCTCN2021120196-appb-000064
对位于第d i个OFDM符号上的
Figure PCTCN2021120196-appb-000065
个连续的子载波上的相位跟踪参考信号
Figure PCTCN2021120196-appb-000066
进行信道均衡,得到均衡后的信号
Figure PCTCN2021120196-appb-000067
其中,
Figure PCTCN2021120196-appb-000068
为时频资源(d i,k PT-RS+n)上的信道响应;
需要说明的是,
Figure PCTCN2021120196-appb-000069
为时频资源(d i,k PT-RS+n)上的信道响应,可以由PTRS端口所关联的DMRS端口的解调参考信号进行信道估计得到。
根据公式
Figure PCTCN2021120196-appb-000070
和均衡后的信号
Figure PCTCN2021120196-appb-000071
得到频域相位噪声响应
Figure PCTCN2021120196-appb-000072
其中,
Figure PCTCN2021120196-appb-000073
为伪随机序列组成的相位跟踪参考信号。
基于所述频域相位噪声响应,得到
Figure PCTCN2021120196-appb-000074
个OFDM符号上的连续抽样点上的时域相位噪声响应;
本步骤可具体包括:
根据所述频域相位噪声响应,通过线性插值处理,得到
Figure PCTCN2021120196-appb-000075
个OFDM符号上每个OFDM符号在其对应的连续的子载波上的频域相位噪声响应;
这里,频域相位噪声响应
Figure PCTCN2021120196-appb-000076
为配置了块状PTRS的M PT-RS个第一OFDM符号中每个第一OFDM符号上的
Figure PCTCN2021120196-appb-000077
个连续的子载波上的频域相位噪声响应
Figure PCTCN2021120196-appb-000078
需要说明的是,根据所述频域相位噪声响应,通过线性插值处理,得到
Figure PCTCN2021120196-appb-000079
个OFDM符号上每个OFDM符号在其对应的连续的子载波上的频域相位噪声响应,可具体包括:
对n循环,其中,n=0,1,…M PT-RS-1
1)由d i,i=0,1,…M PT-RS-1,生成矢量X 0
Figure PCTCN2021120196-appb-000080
Figure PCTCN2021120196-appb-000081
这里,X 0表示第一OFDM符号的时域位置。
2)由
Figure PCTCN2021120196-appb-000082
i=0,1,…M PT-RS-1,生成矢量Y 0
Figure PCTCN2021120196-appb-000083
这里,Y 0表示第一OFDM符号的频域相位噪声响应。
3)由OFDM编号
Figure PCTCN2021120196-appb-000084
生成矢量X。
Figure PCTCN2021120196-appb-000085
4)由X 0,Y 0,X通过线性插值的方法,得到矢量Y。
Figure PCTCN2021120196-appb-000086
矢量Y中第l元素为y l,且
Figure PCTCN2021120196-appb-000087
则:
Figure PCTCN2021120196-appb-000088
这里,
Figure PCTCN2021120196-appb-000089
用于表示
Figure PCTCN2021120196-appb-000090
个OFDM符号上每个OFDM符号在其对应的
Figure PCTCN2021120196-appb-000091
个连续的子载波上的频域相位噪声响应。
n循环结束。
基于
Figure PCTCN2021120196-appb-000092
个OFDM符号上每个OFDM符号在其对应的连续的子载波上的频域相位噪声响应,生成
Figure PCTCN2021120196-appb-000093
个OFDM符号上的连续抽样点上的时域相位噪声响应。
这里,
Figure PCTCN2021120196-appb-000094
个OFDM符号上的连续抽样点上的时域相位噪声响应,记为q l,z,其中,
Figure PCTCN2021120196-appb-000095
z=0,…,N FFT-1
这里,对l循环
1)通过子载波映射关系,将所述
Figure PCTCN2021120196-appb-000096
映射到矢量T中,其中,矢量
Figure PCTCN2021120196-appb-000097
N FFT为傅里叶变换阶数,矢量T中第z元素为t z
需要说明的是,所述子载波映射关系为:
Figure PCTCN2021120196-appb-000098
2)对矢量T进行离散傅里叶逆变换(IFFT),得到矢量S,其中,矢量
Figure PCTCN2021120196-appb-000099
矢量S中第z元素为s z
S=IFFT(T)
将矢量S中的元素作为
Figure PCTCN2021120196-appb-000100
个OFDM符号上的连续抽样点上的时域相位噪声响应。
这里,即q l,z=s z
l循环结束。
基于所述时域相位噪声响应,计算得到
Figure PCTCN2021120196-appb-000101
个OFDM符号上的每个抽样点的时域相位噪声;
这里,
Figure PCTCN2021120196-appb-000102
个OFDM符号上的每个抽样点的时域相位噪声,记为
Figure PCTCN2021120196-appb-000103
其中,
Figure PCTCN2021120196-appb-000104
z=0,…,N FFT-1
本步骤具体可包括:
对l循环
根据公式
Figure PCTCN2021120196-appb-000105
计算得到
Figure PCTCN2021120196-appb-000106
个OFDM符号上的每个抽样点的时域相位噪声
Figure PCTCN2021120196-appb-000107
l循环结束。
根据每个抽样点的时域相位噪声,对第一时域信号进行相位噪声补偿,得到补偿后的第二时域信号。
本步骤具体可包括:
对l循环
根据公式
Figure PCTCN2021120196-appb-000108
和每个抽样点的时域相位噪声,对第一时域信号r l,z进行相位噪声补偿,得到补偿后的第二时域信号
Figure PCTCN2021120196-appb-000109
l循环结束。
本公开实施例的相位噪声补偿方法,通过第一传输资源,获取相位跟踪参考信号,第一传输资源包括:至少一个第一OFDM符号以及位于每个所述第一OFDM符号上的第一子载波组,所述第一子载波组包括连续的子载波;根据相位跟踪参考信号,对第一时域信号进行相位噪声补偿,得到补偿后的第二时域信号,第一时域信号为接收到的
Figure PCTCN2021120196-appb-000110
个OFDM符号上去除循环前缀的时域信号,
Figure PCTCN2021120196-appb-000111
为一个时隙的OFDM符号个数,如此,通过连续的子载波资源获取到的相位跟踪参考信号,同时消除了CPE和ICI对于数据信号的影响,基于此,对第一时域信号进行相位噪声补偿,能够进一步提升系统性 能。
如图3所示,为本公开实施例提供的一种信息传输方法的流程示意图,包括:
步骤301:通过第一传输资源,发送相位跟踪参考信号;
其中,所述第一传输资源包括:至少一个第一OFDM符号以及位于每个所述第一OFDM符号上的第一子载波组,所述第一子载波组包括连续的子载波。
这里,第一OFDM符号的个数由M PT-RS表示,则
Figure PCTCN2021120196-appb-000112
其中,
Figure PCTCN2021120196-appb-000113
为一个时隙的OFDM符号个数,M PT-RS为正整数。
第一子载波组所包括的连续的子载波个数由
Figure PCTCN2021120196-appb-000114
表示,则
Figure PCTCN2021120196-appb-000115
Figure PCTCN2021120196-appb-000116
为正整数。
作为一可选的实现方式,本步骤可具体包括:
Figure PCTCN2021120196-appb-000117
个OFDM符号中的M PT-RS个第一OFDM符号的每个第一OFDM符号上的
Figure PCTCN2021120196-appb-000118
个连续的子载波上发送由伪随机序列组成的相位跟踪参考信号。
这里,由伪随机序列组成的相位跟踪参考信号可由
Figure PCTCN2021120196-appb-000119
表示,其中,k PT-RS为第一子载波组的起始子载波位置,
Figure PCTCN2021120196-appb-000120
本公开实施例的上述技术方案中,通过第一传输资源,发送相位跟踪参考信号,其中,第一传输资源包括:至少一个第一OFDM符号以及位于每个所述第一OFDM符号上的第一子载波组,所述第一子载波组包括连续的子载波,如此,采用连续的子载波资源传输相位跟踪参考信号,能够同时消除CPE和ICI对于数据信号的影响,提升系统性能。
为了保证频域上的第一子载波组不受其他子载波的干扰,如图2所示,进一步地,所述第一子载波组具有第一保护间隔资源和第二保护间隔资源;
其中,所述第一保护间隔资源包括连续的子载波,所述第一保护间隔资源的起始子载波位置与所述第一子载波组的结束子载波位置相邻,所述第一保护间隔资源中连续的子载波个数大于或者等于所述第一子载波组中的连续的子载波个数;
所述第二保护间隔资源包括连续的子载波,所述第二保护间隔资源的结 束子载波位置与所述第一载波组的起始子载波位置相邻,所述第二保护间隔资源中连续的子载波个数大于或者等于所述第一子载波组中的连续的子载波个数。
这里,第一保护间隔资源中连续的子载波个数由
Figure PCTCN2021120196-appb-000121
表示,
Figure PCTCN2021120196-appb-000122
为正整数;第二保护间隔资源中连续的子载波个数由
Figure PCTCN2021120196-appb-000123
表示,
Figure PCTCN2021120196-appb-000124
为正整数。即
Figure PCTCN2021120196-appb-000125
需要说明的是,为了保证频域上的第一子载波组不受其他子载波的干扰,在第一子载波组中
Figure PCTCN2021120196-appb-000126
个连续的子载波(下文称为中间资源)的上部预留
Figure PCTCN2021120196-appb-000127
个连续的子载波(即第一保护间隔资源),同时,在中间资源的下部预留
Figure PCTCN2021120196-appb-000128
个连续的子载波(即第二保护间隔资源)。这里,在第一保护间隔资源和第二保护间隔资源上均不发送任何信号。
这里,第一保护间隔资源中连续的子载波个数与第二保护间隔资源中连续的子载波个数可以相等也可以不相等。
可选地,所述第一传输资源由基站配置。
具体的,第一子载波组内的子载波个数以及所在频域位置由基站配置;所述第一OFDM符号的个数以及所在时域位置由基站配置。
需要说明的是,基站可按照预设时域密度配置M PT-RS个第一OFDM符号。
可选地,所述相位跟踪参考信号由伪随机序列生成。
本公开实施例的信息传输方法,通过第一传输资源,发送相位跟踪参考信号,其中,第一传输资源包括:至少一个第一OFDM符号以及位于每个所述第一OFDM符号上的第一子载波组,所述第一子载波组包括连续的子载波,如此,采用连续的子载波资源传输相位跟踪参考信号,能够同时消除CPE和ICI对于数据信号的影响,提升系统性能。
如图4所示,本公开实施例还提供一种相位噪声补偿装置,该相位噪声补偿装置应用于终端,包括:存储器420、收发机400,处理器410:存储器420,用于存储程序指令;收发机400,用于在所述处理器610的控制下收发数据;处理器410,用于读取所述存储器420中的程序指令并执行以下操作:
通过第一传输资源,获取相位跟踪参考信号,所述第一传输资源包括:至少一个第一OFDM符号以及位于每个所述第一OFDM符号上的第一子载 波组,所述第一子载波组包括连续的子载波;
根据所述相位跟踪参考信号,对第一时域信号进行相位噪声补偿,得到补偿后的第二时域信号,所述第一时域信号为接收到的
Figure PCTCN2021120196-appb-000129
个OFDM符号上去除循环前缀的时域信号,
Figure PCTCN2021120196-appb-000130
为一个时隙的OFDM符号个数。
其中,在图4中,总线架构可以包括任意数量的互联的总线和桥,具体由处理器410代表的一个或多个处理器和存储器420代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起,这些都是本领域所公知的,因此,本文不再对其进行进一步描述。总线接口提供接口。收发机400可以是多个元件,即包括发送机和收发机,提供用于在传输介质上与各种其他装置通信的单元。针对不同的用户设备,用户接口430还可以是能够外接内接需要设备的接口,连接的设备包括但不限于小键盘、显示器、扬声器、麦克风、操纵杆等。
处理器410负责管理总线架构和通常的处理,存储器420可以存储处理器410在执行操作时所使用的数据。
可选的,处理器410可以是中央处理器(central processing unit,CPU)、专用集成电路(Application Specific Integrated Circuit,ASIC)、现场可编程门阵列(Field-Programmable Gate Array,FPGA)或复杂可编程逻辑器件(Complex Programmable Logic Device,CPLD),处理器410也可以采用多核架构。
处理器410通过调用存储器存储的程序指令,用于按照获得的可执行指令执行本申请实施例提供的任一所述方法。处理器410与存储器420也可以物理上分开布置。
可选的,所述第一子载波组具有第一保护间隔资源和第二保护间隔资源;
其中,所述第一保护间隔资源包括连续的子载波,所述第一保护间隔资源的起始子载波位置与所述第一子载波组的结束子载波位置相邻,所述第一保护间隔资源中连续的子载波个数大于或者等于所述第一子载波组中的连续的子载波个数;
所述第二保护间隔资源包括连续的子载波,所述第二保护间隔资源的结束子载波位置与所述第一载波组的起始子载波位置相邻,所述第二保护间隔资源中连续的子载波个数大于或者等于所述第一子载波组中的连续的子载波 个数。
可选的,所述第一传输资源由基站配置。
可选的,所述处理器410,具体包括:
执行以下步骤,直至得到至少一个第一OFDM符号的每个第一OFDM符号上的相位跟踪参考信号;
通过第一传输资源,获取配置有相位跟踪参考信号的OFDM符号的去除循环前缀的时域信号,所述第一OFDM符号为配置有相位跟踪参考信号的OFDM符号;
通过傅里叶变换,将所述时域信号变换为频域信号;
根据所述频域信号,获取配置有相位跟踪参考信号的OFDM符号上的连续的子载波上的相位跟踪参考信号。
可选的,所述处理器410,具体包括:
获取至少一个第一OFDM符号上的每个第一OFDM符号上的相位跟踪参考信号在其对应的连续的子载波上的频域相位噪声响应;
基于所述频域相位噪声响应,得到
Figure PCTCN2021120196-appb-000131
个OFDM符号上的连续抽样点上的时域相位噪声响应;
基于所述时域相位噪声响应,计算得到
Figure PCTCN2021120196-appb-000132
个OFDM符号上的每个抽样点的时域相位噪声;
根据每个抽样点的时域相位噪声,对第一时域信号进行相位噪声补偿,得到补偿后的第二时域信号。
可选的,所述处理器410,具体包括:
执行以下步骤,直至获取至少一个第一OFDM符号上的每个第一OFDM符号上的相位跟踪参考信号在其对应的连续的子载波上的频域相位噪声响应:
对位于配置有相位跟踪参考信号的OFDM符号上的连续的子载波上的相位跟踪参考信号进行信道均衡,得到均衡后的信号,所述第一OFDM符号为配置有相位跟踪参考信号的OFDM符号;
根据均衡后的信号,得到频域相位噪声响应。
可选的,所述处理器410,具体包括:
根据所述频域相位噪声响应,通过线性插值处理,得到
Figure PCTCN2021120196-appb-000133
个OFDM符号上每个OFDM符号在其对应的连续的子载波上的频域相位噪声响应;
基于
Figure PCTCN2021120196-appb-000134
个OFDM符号上每个OFDM符号在其对应的连续的子载波上 的频域相位噪声响应,生成
Figure PCTCN2021120196-appb-000135
个OFDM符号上的连续抽样点上的时域相位噪声响应。
可选的,所述处理器410,具体包括:
通过子载波映射关系,将所述频域相位噪声响应映射到矢量T中,其中,矢量
Figure PCTCN2021120196-appb-000136
N FFT为傅里叶变换阶数;
对矢量T进行离散傅里叶逆变换,得到矢量S,其中,矢量
Figure PCTCN2021120196-appb-000137
将矢量S中的元素作为
Figure PCTCN2021120196-appb-000138
个OFDM符号上的连续抽样点上的时域相位噪声响应。
本公开实施例的相位噪声补偿装置,通过第一传输资源,获取相位跟踪参考信号,第一传输资源包括:至少一个第一OFDM符号以及位于每个所述第一OFDM符号上的第一子载波组,所述第一子载波组包括连续的子载波;根据相位跟踪参考信号,对第一时域信号进行相位噪声补偿,得到补偿后的第二时域信号,第一时域信号为接收到的
Figure PCTCN2021120196-appb-000139
个OFDM符号上去除循环前缀的时域信号,
Figure PCTCN2021120196-appb-000140
为一个时隙的OFDM符号个数,如此,通过连续的子载波资源获取到的相位跟踪参考信号,同时消除了CPE和ICI对于数据信号的影响,基于此,对第一时域信号进行相位噪声补偿,能够进一步提升系统性能。
在此需要说明的是,本公开实施例提供的上述装置,能够实现上述方法实施例所实现的所有方法步骤,且能够达到相同的技术效果,在此不再对本实施例中与方法实施例相同的部分及有益效果进行具体赘述。
如图5所示,本公开实施还提供了一种相位噪声补偿装置,包括:
获取模块501,用于通过第一传输资源,获取相位跟踪参考信号,所述第一传输资源包括:至少一个第一OFDM符号以及位于每个所述第一OFDM符号上的第一子载波组,所述第一子载波组包括连续的子载波;
噪声补偿处理模块502,用于根据所述相位跟踪参考信号,对第一时域信号进行相位噪声补偿,得到补偿后的第二时域信号,所述第一时域信号为接收到的
Figure PCTCN2021120196-appb-000141
个OFDM符号上去除循环前缀的时域信号,
Figure PCTCN2021120196-appb-000142
为一个时隙的OFDM符号个数。
可选的,所述第一子载波组具有第一保护间隔资源和第二保护间隔资源;
其中,所述第一保护间隔资源包括连续的子载波,所述第一保护间隔资源的起始子载波位置与所述第一子载波组的结束子载波位置相邻,所述第一保护间隔资源中连续的子载波个数大于或者等于所述第一子载波组中的连续的子载波个数;
所述第二保护间隔资源包括连续的子载波,所述第二保护间隔资源的结束子载波位置与所述第一载波组的起始子载波位置相邻,所述第二保护间隔资源中连续的子载波个数大于或者等于所述第一子载波组中的连续的子载波个数。
可选的,所述第一传输资源由基站配置。
可选的,所述获取模块501,包括:
第一获取单元,用于通过第一传输资源,获取配置有相位跟踪参考信号的OFDM符号的去除循环前缀的时域信号,所述第一OFDM符号为配置有相位跟踪参考信号的OFDM符号;
第一处理单元,用于通过傅里叶变换,将所述时域信号变换为频域信号;
第二获取单元,用于根据所述频域信号,获取配置有相位跟踪参考信号的OFDM符号上的连续的子载波上的相位跟踪参考信号。
可选的,所述噪声补偿处理模块502,包括:
第三获取单元,用于获取至少一个第一OFDM符号上的每个第一OFDM符号上的相位跟踪参考信号在其对应的连续的子载波上的频域相位噪声响应;
第二处理单元,用于基于所述频域相位噪声响应,得到
Figure PCTCN2021120196-appb-000143
个OFDM符号上的连续抽样点上的时域相位噪声响应;
第一计算单元,用于基于所述时域相位噪声响应,计算得到
Figure PCTCN2021120196-appb-000144
个OFDM符号上的每个抽样点的时域相位噪声;
噪声补偿处理单元,用于根据每个抽样点的时域相位噪声,对第一时域信号进行相位噪声补偿,得到补偿后的第二时域信号。
可选的,所述第三获取单元,具体用于:
执行以下步骤,直至获取至少一个第一OFDM符号上的每个第一OFDM符号上的相位跟踪参考信号在其对应的连续的子载波上的频域相位噪声响应:
对位于配置有相位跟踪参考信号的OFDM符号上的连续的子载波上的相位跟踪参考信号进行信道均衡,得到均衡后的信号,所述第一OFDM符号为配置有相位跟踪参考信号的OFDM符号;
根据均衡后的信号,得到频域相位噪声响应。
可选的,所述第二处理单元,具体用于:
根据所述频域相位噪声响应,通过线性插值处理,得到
Figure PCTCN2021120196-appb-000145
个OFDM符号上每个OFDM符号在其对应的连续的子载波上的频域相位噪声响应;
基于
Figure PCTCN2021120196-appb-000146
个OFDM符号上每个OFDM符号在其对应的连续的子载波上的频域相位噪声响应,生成
Figure PCTCN2021120196-appb-000147
个OFDM符号上的连续抽样点上的时域相位噪声响应。
可选的,所述第二处理单元,还具体用于:
通过子载波映射关系,将所述频域相位噪声响应映射到矢量T中,其中,矢量
Figure PCTCN2021120196-appb-000148
N FFT为傅里叶变换阶数;
对矢量T进行离散傅里叶逆变换,得到矢量S,其中,矢量
Figure PCTCN2021120196-appb-000149
将矢量S中的元素作为
Figure PCTCN2021120196-appb-000150
个OFDM符号上的连续抽样点上的时域相位噪声响应。
本公开实施例的相位噪声补偿装置,通过第一传输资源,获取相位跟踪参考信号,第一传输资源包括:至少一个第一OFDM符号以及位于每个所述第一OFDM符号上的第一子载波组,所述第一子载波组包括连续的子载波;根据相位跟踪参考信号,对第一时域信号进行相位噪声补偿,得到补偿后的第二时域信号,第一时域信号为接收到的
Figure PCTCN2021120196-appb-000151
个OFDM符号上去除循环前缀的时域信号,
Figure PCTCN2021120196-appb-000152
为一个时隙的OFDM符号个数,如此,通过连续的子载波资源获取到的相位跟踪参考信号,同时消除了CPE和ICI对于数据信号的影响,基于此,对第一时域信号进行相位噪声补偿,能够进一步提升系统性能。
需要说明的是,本申请实施例中对单元的划分是示意性的,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式。另外,在本申请各个实施例中的各功能单元可以集成在一个处理单元中,也可以是各个单元单独物理存在,也可以两个或两个以上单元集成在一个单元中。上述集成的单元既 可以采用硬件的形式实现,也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时,可以存储在一个处理器可读取存储介质中。基于这样的理解,本申请的技术方案本质上或者说对相关技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来,该计算机软件产品存储在一个存储介质中,包括若干指令用以使得一台计算机设备(可以是个人计算机,服务器,或者网络设备等)或处理器(processor)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括:U盘、移动硬盘、只读存储器(Read-Only Memory,ROM)、随机存取存储器(Random Access Memory,RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
在此需要说明的是,本公开实施例提供的上述装置,能够实现上述方法实施例所实现的所有方法步骤,且能够达到相同的技术效果,在此不再对本实施例中与方法实施例相同的部分及有益效果进行具体赘述。
在本公开的一些实施例中,还提供了一种处理器可读存储介质,所述处理器可读存储介质存储有程序指令,所述程序指令用于使所述处理器执行实现以下步骤:
通过第一传输资源,获取相位跟踪参考信号,所述第一传输资源包括:至少一个第一OFDM符号以及位于每个所述第一OFDM符号上的第一子载波组,所述第一子载波组包括连续的子载波;
根据所述相位跟踪参考信号,对第一时域信号进行相位噪声补偿,得到补偿后的第二时域信号,所述第一时域信号为接收到的
Figure PCTCN2021120196-appb-000153
个OFDM符号上去除循环前缀的时域信号,
Figure PCTCN2021120196-appb-000154
为一个时隙的OFDM符号个数。
该程序指令被处理器执行时能实现上述应用于如图1所示的方法实施例中的所有实现方式,为避免重复,此处不再赘述。
如图6所示,本公开实施例还提供了一种信息传输装置,该信息传输装置应用于终端或网络侧设备(如基站),包括:存储器620、收发机600,处理器610:存储器620,用于存储计算机程序;收发机600,用于在所述处理器610的控制下收发数据;处理器610,用于读取所述存储器620中的计算机程序,所述收发机600执行以下操作:
通过第一传输资源,发送相位跟踪参考信号;
其中,所述第一传输资源包括:至少一个第一OFDM符号以及位于每个所述第一OFDM符号上的第一子载波组,所述第一子载波组包括连续的子载波。
其中,在图6中,在信息传输装置应用于终端的情况下,总线架构可以包括任意数量的互联的总线和桥,具体由处理器610代表的一个或多个处理器和存储器620代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起,这些都是本领域所公知的,因此,本文不再对其进行进一步描述。总线接口提供接口。收发机600可以是多个元件,即包括发送机和收发机,提供用于在传输介质上与各种其他装置通信的单元。针对不同的用户设备,用户接口还可以是能够外接内接需要设备的接口,连接的设备包括但不限于小键盘、显示器、扬声器、麦克风、操纵杆等。
处理器610负责管理总线架构和通常的处理,存储器620可以存储处理器610在执行操作时所使用的数据。
可选的,处理器610可以是CPU、ASIC、FPGA或CPLD,处理器610也可以采用多核架构。
处理器610通过调用存储器存储的程序指令,用于按照获得的可执行指令执行本申请实施例提供的任一所述方法。处理器610与存储器620也可以物理上分开布置。
在信息传输装置应用于网络侧设备的情况下,总线架构可以包括任意数量的互联的总线和桥,具体由处理器610代表的一个或多个处理器和存储器620代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起,这些都是本领域所公知的,因此,本文不再对其进行进一步描述。总线接口提供接口。收发机600可以是多个元件,即包括发送机和接收机,提供用于在传输介质上与各种其他装置通信的单元,这些传输介质包括无线信道、有线信道、光缆等传输介质。处理器610负责管理总线架构和通常的处理,存储器620可以存储处理器610在执行操作时所使用的数据。
可选的,所述第一子载波组具有第一保护间隔资源和第二保护间隔资源;
其中,所述第一保护间隔资源包括连续的子载波,所述第一保护间隔资源的起始子载波位置与所述第一子载波组的结束子载波位置相邻,所述第一保护间隔资源中连续的子载波个数大于或者等于所述第一子载波组中的连续的子载波个数;
所述第二保护间隔资源包括连续的子载波,所述第二保护间隔资源的结束子载波位置与所述第一载波组的起始子载波位置相邻,所述第二保护间隔资源中连续的子载波个数大于或者等于所述第一子载波组中的连续的子载波个数。
可选的,所述第一传输资源由基站配置。
可选的,所述相位跟踪参考信号由伪随机序列生成。
本公开实施例的信息传输装置,通过第一传输资源,发送相位跟踪参考信号,其中,第一传输资源包括:至少一个第一OFDM符号以及位于每个所述第一OFDM符号上的第一子载波组,所述第一子载波组包括连续的子载波,如此,采用连续的子载波资源传输相位跟踪参考信号,能够同时消除CPE和ICI对于数据信号的影响,提升系统性能。
在此需要说明的是,本公开实施例提供的上述装置,能够实现上述方法实施例所实现的所有方法步骤,且能够达到相同的技术效果,在此不再对本实施例中与方法实施例相同的部分及有益效果进行具体赘述。
如图7所示,本公开实施例还提供了一种信息传输装置,包括:
发送模块701,用于通过第一传输资源,发送相位跟踪参考信号;
其中,所述第一传输资源包括:至少一个第一OFDM符号以及位于每个所述第一OFDM符号上的第一子载波组,所述第一子载波组包括连续的子载波。
可选地,所述第一子载波组具有第一保护间隔资源和第二保护间隔资源;
其中,所述第一保护间隔资源包括连续的子载波,所述第一保护间隔资源的起始子载波位置与所述第一子载波组的结束子载波位置相邻,所述第一保护间隔资源中连续的子载波个数大于或者等于所述第一子载波组中的连续的子载波个数;
所述第二保护间隔资源包括连续的子载波,所述第二保护间隔资源的结束子载波位置与所述第一载波组的起始子载波位置相邻,所述第二保护间隔资源中连续的子载波个数大于或者等于所述第一子载波组中的连续的子载波个数。
可选地,所述第一传输资源由基站配置。
可选地,所述相位跟踪参考信号由伪随机序列生成。
本公开实施例的信息传输装置,通过第一传输资源,发送相位跟踪参考信号,其中,第一传输资源包括:至少一个第一OFDM符号以及位于每个所述第一OFDM符号上的第一子载波组,所述第一子载波组包括连续的子载波,如此,采用连续的子载波资源传输相位跟踪参考信号,能够同时消除CPE和ICI对于数据信号的影响,提升系统性能。
需要说明的是,本申请实施例中对单元的划分是示意性的,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式。另外,在本申请各个实施例中的各功能单元可以集成在一个处理单元中,也可以是各个单元单独物理存在,也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现,也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时,可以存储在一个处理器可读取存储介质中。基于这样的理解,本申请的技术方案本质上或者说对相关技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来,该计算机软件产品存储在一个存储介质中,包括若干指令用以使得一台计算机设备(可以是个人计算机,服务器,或者网络设备等)或处理器(processor)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括:U盘、移动硬盘、只读存储器(Read-Only Memory,ROM)、随机存取存储器(Random Access Memory,RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
在此需要说明的是,本公开实施例提供的上述装置,能够实现上述方法实施例所实现的所有方法步骤,且能够达到相同的技术效果,在此不再对本实施例中与方法实施例相同的部分及有益效果进行具体赘述。
在本公开的一些实施例中,还提供了一种处理器可读存储介质,所述处 理器可读存储介质存储有程序指令,所述程序指令用于使所述处理器执行实现以下步骤:
通过第一传输资源,发送相位跟踪参考信号;
其中,所述第一传输资源包括:至少一个第一OFDM符号以及位于每个所述第一OFDM符号上的第一子载波组,所述第一子载波组包括连续的子载波。
该程序指令被处理器执行时能实现上述应用于如图3所示的方法实施例中的所有实现方式,为避免重复,此处不再赘述。
本申请实施例提供的技术方案可以适用于多种系统,尤其是第五代(5 th Generation,5G)系统。例如适用的系统可以是全球移动通讯(Global System of Mobile communication,GSM)系统、码分多址(Code Division Multiple Access,CDMA)系统、宽带码分多址(Wideband Code Division Multiple Access,WCDMA)通用分组无线业务(General Packet Radio Service,GPRS)系统、长期演进(Long Term Evolution,LTE)系统、LTE频分双工(Frequency Division Duplex,FDD)系统、LTE时分双工(Time Division Duplex,TDD)系统、高级长期演进(Long Term Evolution Advanced,LTE-A)系统、通用移动系统(Universal Mobile Telecommunication System,UMTS)、全球互联微波接入(Worldwide interoperability for Microwave Access,WiMAX)系统、5G新空口(New Radio,NR)系统等。这多种系统中均包括终端设备和网络设备。系统中还可以包括核心网部分,例如演进的分组系统(Evolved Packet System,EPS)、5G系统(5GS)等。
本申请实施例涉及的终端设备,可以是指向用户提供语音和/或数据连通性的设备,具有无线连接功能的手持式设备、或连接到无线调制解调器的其他处理设备等。在不同的系统中,终端设备的名称可能也不相同,例如在5G系统中,终端设备可以称为用户设备(User Equipment,UE)。无线终端设备可以经无线接入网(Radio Access Network,RAN)与一个或多个核心网(Core Network,CN)进行通信,无线终端设备可以是移动终端设备,如移动电话(或称为“蜂窝”电话)和具有移动终端设备的计算机,例如,可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置,它们与无线接入网交换 语言和/或数据。例如,个人通信业务(Personal Communication Service,PCS)电话、无绳电话、会话发起协议(Session Initiated Protocol,SIP)话机、无线本地环路(Wireless Local Loop,WLL)站、个人数字助理(Personal Digital Assistant,PDA)等设备。无线终端设备也可以称为系统、订户单元(subscriber unit)、订户站(subscriber station),移动站(mobile station)、移动台(mobile)、远程站(remote station)、接入点(access point)、远程终端设备(remote terminal)、接入终端设备(access terminal)、用户终端设备(user terminal)、用户代理(user agent)、用户装置(user device),本申请实施例中并不限定。
本申请实施例涉及的网络设备,可以是基站,该基站可以包括多个为终端提供服务的小区。根据具体应用场合不同,基站又可以称为接入点,或者可以是接入网中在空中接口上通过一个或多个扇区与无线终端设备通信的设备,或者其它名称。网络设备可用于将收到的空中帧与网际协议(Internet Protocol,IP)分组进行相互更换,作为无线终端设备与接入网的其余部分之间的路由器,其中接入网的其余部分可包括网际协议(IP)通信网络。网络设备还可协调对空中接口的属性管理。例如,本申请实施例涉及的网络设备可以是全球移动通信系统(Global System for Mobile communications,GSM)或码分多址接入(Code Division Multiple Access,CDMA)中的网络设备(Base Transceiver Station,BTS),也可以是带宽码分多址接入(Wide-band Code Division Multiple Access,WCDMA)中的网络设备(NodeB),还可以是长期演进(Long Term Evolution,LTE)系统中的演进型网络设备(evolutional Node B,eNB或e-NodeB)、5G网络架构(next generation system)中的5G基站(gNB),也可以是家庭演进基站(Home evolved Node B,HeNB)、中继节点(relay node)、家庭基站(femto)、微微基站(pico)等,本申请实施例中并不限定。在一些网络结构中,网络设备可以包括集中单元(Centralized Unit,CU)节点和分布单元(Distributed Unit,DU)节点,集中单元和分布单元也可以地理上分开布置。
网络设备与终端设备之间可以各自使用一或多根天线进行多输入多输出(Multi Input Multi Output,MIMO)传输,MIMO传输可以是单用户MIMO(Single User MIMO,SU-MIMO)或多用户MIMO(Multiple User MIMO, MU-MIMO)。根据天线组合的形态和数量,MIMO传输可以是二维MIMO(two dimensional-MIMO,2D-MIMO)、三维MIMO(three dimensional-MIMO,3D-MIMO)、全维MIMO(full dimensional-MIMO,FD-MIMO)或massive-MIMO,也可以是分集传输或预编码传输或波束赋形传输等。
本领域内的技术人员应明白,本申请的实施例可提供为方法、系统、或计算机程序产品。因此,本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且,本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器和光学存储器等)上实施的计算机程序产品的形式。
本申请是参照根据本申请实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机可执行指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机可执行指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器,使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些处理器可执行指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的处理器可读存储器中,使得存储在该处理器可读存储器中的指令产生包括指令装置的制造品,该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些处理器可执行指令也可装载到计算机或其他可编程数据处理设备上,使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理,从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
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。
在本申请所提供的实施例中,应该理解到,所揭露的装置和方法,可以 通过其它的方式实现。例如,以上所描述的装置实施例仅仅是示意性的,例如,所述单元的划分,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式,例如多个单元或组件可以结合或者可以集成到另一个系统,或一些特征可以忽略,或不执行。另一点,所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口,装置或单元的间接耦合或通信连接,可以是电性,机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的,作为单元显示的部件可以是或者也可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外,在本公开各个实施例中的各功能单元可以集成在一个处理单元中,也可以是各个单元单独物理存在,也可以两个或两个以上单元集成在一个单元中。
通过以上的实施方式的描述,本领域的技术人员可以清楚地了解到上述实施例方法可借助软件加必需的通用硬件平台的方式来实现,当然也可以通过硬件,但很多情况下前者是更佳的实施方式。根据这样的理解,本公开的技术方案本质上或者说对现有相关技术做出贡献的部分可以以软件产品的形式体现出来,该计算机软件产品存储在一个存储介质(如ROM/RAM、磁盘、光盘)中,包括若干指令用以使得一台终端(可以是手机,计算机,服务器,空调器,或者网络设备等)执行本公开的各个实施例所述的方法。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程,是可以通过计算机程序来控制相关的硬件来完成,所述的程序可存储于计算机可读取存储介质中,该程序在执行时,可包括如上述各方法的实施例的流程。其中,所述的存储介质可为磁碟、光盘、只读存储器(Read-Only Memory,ROM)或随机存取存储器(Random Access Memory,RAM)等。
可以理解的是,本公开实施例描述的这些实施例可以用硬件、软件、固件、中间件、微码或其组合来实现。对于硬件实现,模块、单元、子单元可以实现在一个或多个专用集成电路(Application Specific Integrated Circuits,ASIC)、数字信号处理器(Digital Signal Processor,DSP)、数字信号处理设备 (DSP Device,DSPD)、可编程逻辑设备(Programmable Logic Device,PLD)、现场可编程门阵列(Field-Programmable Gate Array,FPGA)、通用处理器、控制器、微控制器、微处理器、用于执行本公开所述功能的其它电子单元或其组合中。
对于软件实现,可通过执行本公开实施例所述功能的模块(例如过程、函数等)来实现本公开实施例所述的技术。软件代码可存储在存储器中并通过处理器执行。存储器可以在处理器中或在处理器外部实现。
显然,本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和范围。这样,倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内,则本申请也意图包含这些改动和变型在内。

Claims (25)

  1. 一种相位噪声补偿方法,包括:
    通过第一传输资源,获取相位跟踪参考信号,所述第一传输资源包括:至少一个第一OFDM符号以及位于每个所述第一OFDM符号上的第一子载波组,所述第一子载波组包括连续的子载波;
    根据所述相位跟踪参考信号,对第一时域信号进行相位噪声补偿,得到补偿后的第二时域信号,所述第一时域信号为接收到的
    Figure PCTCN2021120196-appb-100001
    个OFDM符号上去除循环前缀的时域信号,
    Figure PCTCN2021120196-appb-100002
    为一个时隙的OFDM符号个数。
  2. 根据权利要求1所述的方法,其中,所述第一子载波组具有第一保护间隔资源和第二保护间隔资源;
    其中,所述第一保护间隔资源包括连续的子载波,所述第一保护间隔资源的起始子载波位置与所述第一子载波组的结束子载波位置相邻,所述第一保护间隔资源中连续的子载波个数大于或者等于所述第一子载波组中的连续的子载波个数;
    所述第二保护间隔资源包括连续的子载波,所述第二保护间隔资源的结束子载波位置与所述第一载波组的起始子载波位置相邻,所述第二保护间隔资源中连续的子载波个数大于或者等于所述第一子载波组中的连续的子载波个数。
  3. 根据权利要求1所述的方法,其中,所述第一传输资源由基站配置。
  4. 根据权利要求1所述的方法,其中,所述通过第一传输资源,获取相位跟踪参考信号,包括:
    执行以下步骤,直至得到每个所述第一OFDM符号上的相位跟踪参考信号;
    通过第一传输资源,获取所述第一OFDM符号的去除循环前缀的时域信号,所述第一OFDM符号为配置有相位跟踪参考信号的OFDM符号;
    通过傅里叶变换,将所述时域信号变换为频域信号;
    根据所述频域信号,获取所述第一OFDM符号上的连续的子载波上的相位跟踪参考信号。
  5. 根据权利要求1所述的方法,其中,所述根据所述相位跟踪参考信号,对第一时域信号进行相位噪声补偿,得到补偿后的第二时域信号,包括:
    获取每个所述第一OFDM符号上的相位跟踪参考信号在其对应的连续的子载波上的频域相位噪声响应;
    基于所述频域相位噪声响应,得到
    Figure PCTCN2021120196-appb-100003
    个OFDM符号上的连续抽样点上的时域相位噪声响应;
    基于所述时域相位噪声响应,计算得到
    Figure PCTCN2021120196-appb-100004
    个OFDM符号上的每个抽样点的时域相位噪声;
    根据每个抽样点的时域相位噪声,对第一时域信号进行相位噪声补偿,得到补偿后的第二时域信号。
  6. 根据权利要求5所述的方法,其中,获取每个所述第一OFDM符号上的相位跟踪参考信号在其对应的连续的子载波上的频域相位噪声响应,包括:
    执行以下步骤,直至获取每个所述第一OFDM符号上的相位跟踪参考信号在其对应的连续的子载波上的频域相位噪声响应:
    对位于所述第一OFDM符号上的连续的子载波上的相位跟踪参考信号进行信道均衡,得到均衡后的信号,所述第一OFDM符号为配置有相位跟踪参考信号的OFDM符号;
    根据均衡后的信号,得到频域相位噪声响应。
  7. 根据权利要求5所述的方法,其中,所述基于所述频域相位噪声响应,得到
    Figure PCTCN2021120196-appb-100005
    个OFDM符号上的连续抽样点上的时域相位噪声响应,包括:
    根据所述频域相位噪声响应,通过线性插值处理,得到
    Figure PCTCN2021120196-appb-100006
    个OFDM符号中的每个OFDM符号在其对应的连续的子载波上的频域相位噪声响应;
    基于
    Figure PCTCN2021120196-appb-100007
    个OFDM符号中的每个OFDM符号在其对应的连续的子载波上的频域相位噪声响应,生成
    Figure PCTCN2021120196-appb-100008
    个OFDM符号上的连续抽样点上的时域相位噪声响应。
  8. 根据权利要求7所述的方法,其中,所述基于
    Figure PCTCN2021120196-appb-100009
    个OFDM符号中的每个OFDM符号在其对应的连续的子载波上的频域相位噪声响应,生成
    Figure PCTCN2021120196-appb-100010
    个OFDM符号上的连续抽样点上的时域相位噪声响应,包括:
    通过子载波映射关系,将所述频域相位噪声响应映射到矢量T中,其中, 矢量
    Figure PCTCN2021120196-appb-100011
    N FFT为傅里叶变换阶数;
    对矢量T进行离散傅里叶逆变换,得到矢量S,其中,矢量
    Figure PCTCN2021120196-appb-100012
    将矢量S中的元素作为
    Figure PCTCN2021120196-appb-100013
    个OFDM符号上的连续抽样点上的时域相位噪声响应。
  9. 一种相位噪声补偿装置,包括:存储器、收发机,处理器:存储器,用于存储程序指令;收发机,用于在所述处理器的控制下收发数据;处理器,用于读取所述存储器中的程序指令并执行以下操作:
    通过第一传输资源,获取相位跟踪参考信号,所述第一传输资源包括:至少一个第一OFDM符号以及位于每个所述第一OFDM符号上的第一子载波组,所述第一子载波组包括连续的子载波;
    根据所述相位跟踪参考信号,对第一时域信号进行相位噪声补偿,得到补偿后的第二时域信号,所述第一时域信号为接收到的
    Figure PCTCN2021120196-appb-100014
    个OFDM符号上去除循环前缀的时域信号,
    Figure PCTCN2021120196-appb-100015
    为一个时隙的OFDM符号个数。
  10. 根据权利要求9所述的装置,其中,所述第一子载波组具有第一保护间隔资源和第二保护间隔资源;
    其中,所述第一保护间隔资源包括连续的子载波,所述第一保护间隔资源的起始子载波位置与所述第一子载波组的结束子载波位置相邻,所述第一保护间隔资源中连续的子载波个数大于或者等于所述第一子载波组中的连续的子载波个数;
    所述第二保护间隔资源包括连续的子载波,所述第二保护间隔资源的结束子载波位置与所述第一载波组的起始子载波位置相邻,所述第二保护间隔资源中连续的子载波个数大于或者等于所述第一子载波组中的连续的子载波个数。
  11. 根据权利要求9所述的装置,其中,所述第一传输资源由基站配置。
  12. 根据权利要求9所述的装置,其中,所述处理器,具体包括:
    执行以下步骤,直至得到每个所述第一OFDM符号上的相位跟踪参考信号;
    通过第一传输资源,获取所述第一OFDM符号的去除循环前缀的时域信 号,所述第一OFDM符号为配置有相位跟踪参考信号的OFDM符号;
    通过傅里叶变换,将所述时域信号变换为频域信号;
    根据所述频域信号,获取所述第一OFDM符号上的连续的子载波上的相位跟踪参考信号。
  13. 根据权利要求9所述的装置,其中,所述处理器,具体包括:
    获取每个所述第一OFDM符号上的相位跟踪参考信号在其对应的连续的子载波上的频域相位噪声响应;
    基于所述频域相位噪声响应,得到
    Figure PCTCN2021120196-appb-100016
    个OFDM符号上的连续抽样点上的时域相位噪声响应;
    基于所述时域相位噪声响应,计算得到
    Figure PCTCN2021120196-appb-100017
    个OFDM符号上的每个抽样点的时域相位噪声;
    根据每个抽样点的时域相位噪声,对第一时域信号进行相位噪声补偿,得到补偿后的第二时域信号。
  14. 根据权利要求13所述的装置,其中,所述处理器,具体包括:
    执行以下步骤,直至获取每个所述第一OFDM符号上的相位跟踪参考信号在其对应的连续的子载波上的频域相位噪声响应:
    对位于所述第一OFDM符号上的连续的子载波上的相位跟踪参考信号进行信道均衡,得到均衡后的信号,所述第一OFDM符号为配置有相位跟踪参考信号的OFDM符号;
    根据均衡后的信号,得到频域相位噪声响应。
  15. 根据权利要求13所述的装置,其中,所述处理器,具体包括:
    根据所述频域相位噪声响应,通过线性插值处理,得到
    Figure PCTCN2021120196-appb-100018
    个OFDM符号中的每个OFDM符号在其对应的连续的子载波上的频域相位噪声响应;
    基于
    Figure PCTCN2021120196-appb-100019
    个OFDM符号中的每个OFDM符号在其对应的连续的子载波上的频域相位噪声响应,生成
    Figure PCTCN2021120196-appb-100020
    个OFDM符号上的连续抽样点上的时域相位噪声响应。
  16. 根据权利要求15所述的装置,其中,所述处理器,具体包括:
    通过子载波映射关系,将所述频域相位噪声响应映射到矢量T中,其中,矢量
    Figure PCTCN2021120196-appb-100021
    N FFT为傅里叶变换阶数;
    对矢量T进行离散傅里叶逆变换,得到矢量S,其中,矢量
    Figure PCTCN2021120196-appb-100022
    将矢量S中的元素作为
    Figure PCTCN2021120196-appb-100023
    个OFDM符号上的连续抽样点上的时域相位噪声响应。
  17. 一种相位噪声补偿装置,包括:
    获取模块,用于通过第一传输资源,获取相位跟踪参考信号,所述第一传输资源包括:至少一个第一OFDM符号以及位于每个所述第一OFDM符号上的第一子载波组,所述第一子载波组包括连续的子载波;
    噪声补偿处理模块,用于根据所述相位跟踪参考信号,对第一时域信号进行相位噪声补偿,得到补偿后的第二时域信号,所述第一时域信号为接收到的
    Figure PCTCN2021120196-appb-100024
    个OFDM符号上去除循环前缀的时域信号,
    Figure PCTCN2021120196-appb-100025
    为一个时隙的OFDM符号个数。
  18. 根据权利要求17所述的装置,其中,所述第一子载波组具有第一保护间隔资源和第二保护间隔资源;
    其中,所述第一保护间隔资源包括连续的子载波,所述第一保护间隔资源的起始子载波位置与所述第一子载波组的结束子载波位置相邻,所述第一保护间隔资源中连续的子载波个数大于或者等于所述第一子载波组中的连续的子载波个数;
    所述第二保护间隔资源包括连续的子载波,所述第二保护间隔资源的结束子载波位置与所述第一载波组的起始子载波位置相邻,所述第二保护间隔资源中连续的子载波个数大于或者等于所述第一子载波组中的连续的子载波个数。
  19. 根据权利要求17所述的装置,其中,所述第一传输资源由基站配置。
  20. 根据权利要求17所述的装置,其中,所述获取模块包括:
    第一获取单元,用于通过第一传输资源,获取所述第一OFDM符号的去除循环前缀的时域信号,所述第一OFDM符号为配置有相位跟踪参考信号的OFDM符号;
    第一处理单元,用于通过傅里叶变换,将所述时域信号变换为频域信号;
    第二获取单元,用于根据所述频域信号,获取所述第一OFDM符号上的连续的子载波上的相位跟踪参考信号。
  21. 根据权利要求17所述的装置,其中,所述噪声补偿处理模块包括:
    第三获取单元,用于获取每个所述第一OFDM符号上的相位跟踪参考信号在其对应的连续的子载波上的频域相位噪声响应;
    第二处理单元,用于基于所述频域相位噪声响应,得到
    Figure PCTCN2021120196-appb-100026
    个OFDM符号上的连续抽样点上的时域相位噪声响应;
    第一计算单元,用于基于所述时域相位噪声响应,计算得到
    Figure PCTCN2021120196-appb-100027
    个OFDM符号上的每个抽样点的时域相位噪声;
    噪声补偿处理单元,用于根据每个抽样点的时域相位噪声,对第一时域信号进行相位噪声补偿,得到补偿后的第二时域信号。
  22. 根据权利要求21所述的装置,其中,所述第三获取单元,具体用于:
    执行以下步骤,直至获取每个所述第一OFDM符号上的相位跟踪参考信号在其对应的连续的子载波上的频域相位噪声响应:
    对位于所述第一OFDM符号上的连续的子载波上的相位跟踪参考信号进行信道均衡,得到均衡后的信号,所述第一OFDM符号为配置有相位跟踪参考信号的OFDM符号;
    根据均衡后的信号,得到频域相位噪声响应。
  23. 根据权利要求21所述的装置,其中,所述第二处理单元,具体用于:
    根据所述频域相位噪声响应,通过线性插值处理,得到
    Figure PCTCN2021120196-appb-100028
    个OFDM符号中的每个OFDM符号在其对应的连续的子载波上的频域相位噪声响应;
    基于
    Figure PCTCN2021120196-appb-100029
    个OFDM符号中的每个OFDM符号在其对应的连续的子载波上的频域相位噪声响应,生成
    Figure PCTCN2021120196-appb-100030
    个OFDM符号上的连续抽样点上的时域相位噪声响应。
  24. 根据权利要求23所述的装置,其中,所述第二处理单元,还具体用于:
    通过子载波映射关系,将所述频域相位噪声响应映射到矢量T中,其中,矢量
    Figure PCTCN2021120196-appb-100031
    N FFT为傅里叶变换阶数;
    对矢量T进行离散傅里叶逆变换,得到矢量S,其中,矢量
    Figure PCTCN2021120196-appb-100032
    将矢量S中的元素作为
    Figure PCTCN2021120196-appb-100033
    个OFDM符号上的连续抽样点上的时域相位噪声响应。
  25. 一种计算机可读存储介质,其上存储有计算机程序,该计算机程序被处理器执行时实现如权利要求1至8中任一项所述的相位噪声补偿方法的步骤。
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