WO2017129009A1 - Procédé et appareil de détection de signal - Google Patents

Procédé et appareil de détection de signal Download PDF

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Publication number
WO2017129009A1
WO2017129009A1 PCT/CN2017/071500 CN2017071500W WO2017129009A1 WO 2017129009 A1 WO2017129009 A1 WO 2017129009A1 CN 2017071500 W CN2017071500 W CN 2017071500W WO 2017129009 A1 WO2017129009 A1 WO 2017129009A1
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Prior art keywords
signal
interfering cell
cell
interfering
channel estimation
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PCT/CN2017/071500
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English (en)
Chinese (zh)
Inventor
吴凯
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电信科学技术研究院
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Publication of WO2017129009A1 publication Critical patent/WO2017129009A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0036—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver
    • H04L1/0038—Blind format detection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0045—Arrangements at the receiver end
    • H04L1/0047—Decoding adapted to other signal detection operation
    • H04L1/0048—Decoding adapted to other signal detection operation in conjunction with detection of multiuser or interfering signals, e.g. iteration between CDMA or MIMO detector and FEC decoder
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a signal detection method and apparatus.
  • the network side sends signaling information of the interfering cell to the user equipment.
  • the User Equipment UE
  • UE enables the UE to detect or remove the interference signal of the interference downlink (Physical downlink shared channel (PDSCH) of the interfering cell (Network Assisted Interference Cancellation and Suppression, NAICS).
  • PDSCH Physical downlink shared channel
  • NAICS Network Assisted Interference Cancellation and Suppression
  • the part of the transmission parameter is a dynamic parameter. If the part of the parameter is kept unchanged in the signaling period and sent to the UE, the network side loses flexibility. Therefore, the network side does not deliver these dynamic parameters, and the UE needs to blindly detect the dynamic parameters.
  • the modulation mode used by the PDSCH to transmit data of the interfering cell is a key parameter for the UE to perform the joint detection, and the parameter is also a dynamic parameter, and the parameter is not sent by the network side. Therefore, the UE needs to perform blind detection on this parameter.
  • the existing schemes for blind detection of modulation methods have higher complexity and cannot obtain good blind detection performance.
  • the blind detection scheme of the modulation method needs to be based on the existing information, in Quadrature Phase Shift Keying (PSK), 16 Quadrature Amplitude Modulation (QAM), and 64QAM modulation modes.
  • PSK Quadrature Phase Shift Keying
  • QAM 16 Quadrature Amplitude Modulation
  • 64QAM modulation modes The modulation method with the highest probability is selected, and the blind modulation detection schemes of the existing modulation methods are analyzed.
  • These schemes are similar to the ideas of the maximum likelihood detection scheme, that is, the modulation scheme blind detection scheme and the joint detection algorithm are more similar.
  • This kind of scheme is a maximum likelihood modulation method judging method (Full ML) based on likelihood information, which calculates the probability that the interfering cell is three different modulation modes, and selects the modulation mode with the highest probability.
  • the method is described by:
  • H s (l) represents the channel of the serving cell
  • H I (1) represents the channel of the interfering cell
  • N nm represents the serving cell and The number of joint modulation constellation point combinations of the interfering cell
  • the conventional scheme is equivalent to using the maximum likelihood criterion for each RE, calculating the probability of each modulation mode, and further calculating a plurality of REs as the joint probability of the modulation mode. Since the method needs to calculate the probability that the modulation modes used by the interfering cell to transmit data are QPSK, 16QAM, and 64QAM, respectively, the process is equivalent to performing three-time maximum likelihood detection, so that the computation amount is greatly increased.
  • the complexity of the maximum likelihood detection itself is very high. If a complex detector with a higher complexity is used in the joint detection of a conventional receiver, adding a modulation mode blind detection function module will make The overall complexity of the receiver is extremely high.
  • the existing signal detection method requires a complex algorithm to perform blind detection on the modulation method used by the interfering cell to transmit data before the joint detection of the signal of the serving cell and the signal of the interfering cell, which greatly increases the number of detection methods.
  • the overall complexity of signal detection reduces the efficiency of signal detection and increases the power consumption of signal detection equipment.
  • the embodiment of the invention provides a signal detection method and device, which are used to reduce the complexity of signal detection and improve the letter. No. Detects efficiency and reduces power consumption of signal detection equipment.
  • the signal of the serving cell and the interference cell according to the channel estimation value of the serving cell and the channel estimation value of the interfering cell, the parameter of the interfering cell determined by the blind detection, and the modulation mode adopted by the preset interfering cell transmission data
  • the signal is jointly detected.
  • the method provided by the embodiment of the present invention obtains channel estimation values of the serving cell and channel estimation values of the interfering cell by using channel estimation of the signal of the serving cell and the signal of the interfering cell, and determining parameters of the interfering cell by blind detection.
  • the signal of the serving cell and the signal of the interfering cell are jointly detected, thereby There is no need to perform a process of blindly detecting the modulation mode used by the interfering cell to transmit data, and it is also unnecessary to modify the structure of the existing receiver, thereby reducing the overall complexity of signal detection and improving signal detection efficiency.
  • the overall computational complexity of the solution is reduced, thereby reducing the power consumption of the signal detection device.
  • the method further includes: separating and outputting a detection result of the serving cell signal from a result of joint detection of the signal of the serving cell and the signal of the interfering cell. Thereby, the detection result of the final serving cell signal can be obtained.
  • the modulation mode used by the preset interfering cell to transmit data is: a highest-order modulation mode among multiple modulation modes that can be used when the interfering cell transmits data; or, may be adopted when the interfering cell transmits data.
  • the modulation mode adopted by the interfering cell to transmit data is preset to be the highest-order modulation mode among the multiple modulation modes that can be used when the interfering cell transmits data, or the highest-order modulation mode that can be adopted when the interfering cell transmits data.
  • Modulation mode Higher-order modulation mode, even if the interference signal is actually transmitted in the low-order modulation mode, the constellation point symbol corresponding to the preset high-order modulation mode must have a lower order than the actual data transmission. The constellation point symbol corresponding to the constellation point symbol corresponding to the modulation mode is very close. Therefore, the preset does not reduce the detection performance.
  • the process of blind detection of the modulation mode used by the interfering cell to transmit data can be omitted, thereby reducing the amount of computation. In turn, the complexity of signal detection is reduced.
  • the preset interference mode used by the interfering cell to transmit data is 64QAM or 256QAM.
  • the maximum likelihood detection algorithm is used to jointly detect the signal of the serving cell and the signal of the interfering cell.
  • a channel estimation module configured to perform channel estimation on a signal of a serving cell and a signal of an interfering cell, and obtain a channel estimation value of the serving cell and a channel estimation value of the interfering cell, respectively;
  • a blind detection module configured to determine parameters of an interfering cell by blind detection
  • the joint detection module is configured to: according to the channel estimation value of the serving cell and the channel estimation value of the interfering cell, the parameter of the interfering cell determined by the blind detection, and the modulation mode adopted by the preset interfering cell transmission data, to the serving cell The signal and the signal of the interfering cell are jointly detected.
  • the blind detection module does not need to blindly detect the modulation mode used by the interfering cell to transmit data, the calculation amount can be reduced, thereby reducing the overall complexity of signal detection, improving signal detection efficiency, and reducing power consumption of the signal detection device.
  • the joint detection module is further configured to: separate and output a detection result of the serving cell signal from a result of joint detection of the signal of the serving cell and the signal of the interfering cell. Thereby, the detection result of the final serving cell signal can be obtained.
  • the modulation mode used by the preset interfering cell to transmit data is: a highest-order modulation mode among multiple modulation modes that can be used when the interfering cell transmits data; or, may be adopted when the interfering cell transmits data.
  • the higher order modulation method of the highest order modulation method among multiple modulation methods is: a highest-order modulation mode among multiple modulation modes that can be used when the interfering cell transmits data; or, may be adopted when the interfering cell transmits data.
  • the preset interference mode used by the interfering cell to transmit data is 64QAM or 256QAM.
  • the joint detection module uses a maximum likelihood detection algorithm to jointly detect signals of the serving cell and signals of the interfering cell.
  • the embodiment of the present invention further provides a signal detecting apparatus, including: a processor, a transceiver, and a memory; the processor is configured to read a program in the memory, and execute the method described in the foregoing embodiment.
  • FIG. 1 is a schematic diagram of a design framework of a NAICS receiver according to an embodiment of the present invention
  • FIG. 2 is a schematic flowchart of a signal detection method according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a signal detecting apparatus according to an embodiment of the present disclosure.
  • FIG. 4 is a schematic structural diagram of another signal detecting apparatus according to an embodiment of the present invention.
  • Embodiments of the present invention provide a signal detection method and apparatus for reducing signal detection complexity, improving signal detection efficiency, and reducing power consumption of a signal detection device.
  • the embodiment of the present invention provides a signal detection method, which can be implemented by a NAICS receiver.
  • FIG. 1 is a schematic diagram of a design framework of a NAICS receiver according to an embodiment of the present invention.
  • the NAICS receiver includes three modules, which are a channel estimation module, a blind detection module, and a joint detection module.
  • the channel estimation module is configured to perform channel estimation on the signal of the serving cell and the signal of the interfering cell, respectively obtain the channel estimation value of the serving cell and the channel estimation value of the interfering cell
  • the blind detection module is configured to determine the interfering cell by blind detection.
  • the parameters of the interfering cell include, but are not limited to, whether the interference exists, the data transmission mode, the codebook, the number of layers of the interfering cell, and the like;
  • the joint detection module is configured to: according to the channel estimation value of the serving cell and the channel estimation value of the interfering cell, The signals of the serving cell and the signals of the interfering cell are jointly detected by the parameters of the interfering cell determined by the blind detection and the modulation mode adopted by the preset interfering cell transmission data.
  • the blind detection module does not blindly detect the modulation mode used by the interfering cell to transmit data, and only blindly detects whether the interference exists, the data transmission mode, the codebook, and the number of layers of the interfering cell.
  • the joint detection module performs the joint detection on the signal of the serving cell and the signal of the interfering cell, and the signal is detected according to the modulation mode used by the interfering cell to transmit the data. Therefore, the embodiment of the present invention directly inputs the preset to the joint detection module.
  • the modulation mode adopted by the interfering cell to transmit data, and the modulation mode adopted by the preset interfering cell to transmit data is the highest-order modulation mode among multiple modulation modes that can be adopted when the interfering cell transmits data, or is a specific interference cell
  • the higher-order modulation mode of the highest-order modulation mode such as 64QAM or higher-order 256QAM than 64QAM, which can be used in the transmission of data, so that the joint detection module uses the data according to the preset interference cell transmission data.
  • the modulation method completes the process of detecting the signal.
  • the blind detection module does not need to perform a complicated blind detection process for the modulation mode used by the interfering cell to transmit data, and greatly simplifies the calculation amount in the signal detection process under the premise of ensuring the detection performance, so that the overall signal detection is complicated. Degree is reduced.
  • a signal detection method provided by an embodiment of the present invention includes:
  • S101 Perform channel estimation on a signal of a serving cell and a signal of an interfering cell, and obtain a channel estimation value of the serving cell and a channel estimation value of the interfering cell, respectively.
  • the received signal may be blindly detected on each physical resource block (PRB) to determine parameters of the interfering cell, and the parameters of the interfering cell may include, for example, whether interference exists or not. Parameters such as mode, codebook, and number of layers of interfering cells.
  • PRB physical resource block
  • S103 Perform signal and interference on the serving cell according to the channel estimation value of the serving cell and the channel estimation value of the interfering cell, the parameter of the interfering cell determined by the blind detection, and the modulation mode adopted by the preset interfering cell transmission data.
  • the signals of the cell are jointly detected.
  • the modulation mode adopted by the serving cell to transmit data may be determined in advance, and the modulation mode used by the serving cell to transmit data may be determined in advance, specifically Technical implementation, no longer repeat here.
  • the modulation mode used by the preset interfering cell to transmit data is: the highest-order modulation mode of the multiple modulation modes that can be used when the interfering cell transmits data; or multiple types that can be adopted when the interfering cell transmits data.
  • the highest order modulation method in the modulation mode is a higher order modulation method.
  • the modulation mode used by the interfering cell to transmit data is preset to be the highest-order modulation mode among the multiple modulation modes that can be used when the interfering cell transmits data, or multiple types that can be adopted when the interfering cell transmits data.
  • the higher order modulation mode of the highest order modulation mode in the modulation mode does not degrade the detection performance.
  • the modulation modes that can be used when the interfering cell transmits data include: QPSK, 16QAM, and 64QAM. These modulation modes can be understood as the modulation modes agreed by those skilled in the art. Among them, 64QAM is the highest-order modulation mode. The higher order modulation mode of 64QAM is 256QAM.
  • the modulation mode used by the interfering cell to transmit data may be preset to 64QAM, or a higher order 256QAM than 64QAM. Certainly, if the modulation mode that can be used for the subsequent interfering cell transmission data includes a higher-order modulation mode than the 64QAM, the modulation mode used by the interfering cell to transmit data is preset to be a higher-order modulation mode than the 64QAM.
  • the maximum likelihood detection algorithm may be used to jointly detect the signal of the serving cell and the signal of the interfering cell, and separate and output the serving cell signal from the result of joint detection of the signal of the serving cell and the signal of the interfering cell. Test results.
  • the maximum likelihood detection algorithm is not described in the prior art because it is a prior art.
  • the serving cell is a layer 1 closed loop transmission (TM4)
  • the interfering cell is also a TM4 transmission
  • the NAICS receiver completes the channel estimation for the serving cell and the interfering cell
  • the blind detection module is on each PRB. Blind detection of parameters such as interference presence, data transmission mode, codebook, and number of interfering cell layers is completed, and parameters of the interfering cell are obtained.
  • the joint detection module acquires a channel estimation value of the serving cell and a channel estimation value of the interfering cell, a parameter of the interfering cell obtained by the blind detection, and a modulation mode used by the serving cell to transmit data, and assumes that the modulation mode used by the interfering cell to transmit data is 64QAM, according to these parameters, the signal of the serving cell and the signal of the interfering cell are jointly detected based on the maximum likelihood detection algorithm, and separated and outputted from the result of joint detection of the signal of the serving cell and the signal of the interfering cell. The detection result of the serving cell signal.
  • the joint detection module can directly assume the modulation mode used by the interfering cell to transmit data, and may also be the blind detection module after performing blind detection of parameters such as interference presence, data transmission mode, codebook, and number of interfering cell layers. Setting a modulation mode used by the interfering cell to transmit data (for example, 64QAM), and transmitting the modulation mode adopted by the set interfering cell transmission data to the joint detection module together with the parameters of the interfering cell obtained by the blind detection, and further The joint detection module performs joint detection on the signal of the serving cell and the signal of the interfering cell according to these parameters.
  • a modulation mode used by the interfering cell to transmit data for example, 64QAM
  • the joint detection module performs joint detection on the signal of the serving cell and the signal of the interfering cell according to these parameters.
  • the serving cell is a space-frequency block coding (TM2) transmission
  • the interfering cell is also a TM2 transmission
  • the NAICS receiver completes the channel estimation for the serving cell and the interfering cell, and completes on each PRB. Blind detection of parameters such as interference presence, data transmission mode, codebook, and number of interfering cell layers, and parameters of the interfering cell are obtained.
  • the joint detection module acquires a channel estimation value of the serving cell and a channel estimation value of the interfering cell, a parameter of the interfering cell obtained by the blind detection, and a modulation mode used by the serving cell to transmit data, and assumes that the modulation mode used by the interfering cell to transmit data is 256QAM, according to these parameters, the signal of the serving cell and the signal of the interfering cell are jointly detected based on the maximum likelihood detection algorithm, and separated and outputted from the result of joint detection of the signal of the serving cell and the signal of the interfering cell. The detection result of the serving cell signal.
  • the signal detection method provided by the embodiment of the invention can reduce the computational complexity in the signal detection process without further modifying the structure of the existing NAICS receiver, thereby reducing the overall complexity of the signal detection.
  • a signal detecting apparatus includes:
  • the channel estimation module 11 is configured to perform channel estimation on the signal of the serving cell and the signal of the interfering cell, and obtain a channel estimation value of the serving cell and a channel estimation value of the interfering cell, respectively;
  • the blind detection module 12 is configured to determine parameters of the interfering cell by using blind detection
  • the joint detection module 13 is configured to: according to the channel estimation value of the serving cell and the channel estimation value of the interfering cell, The parameters of the interfering cell determined by the blind detection and the modulation mode adopted by the preset interfering cell transmission data are jointly detected by the signal of the serving cell and the signal of the interfering cell.
  • the signal detecting apparatus provided by the embodiment of the present invention may be, for example, a NAICS receiver.
  • the joint detection module 13 is further configured to:
  • the detection result of the serving cell signal is separated and outputted from the result of joint detection of the signal of the serving cell and the signal of the interfering cell.
  • the modulation mode used by the preset interfering cell to transmit data is: a highest-order modulation mode among multiple modulation modes that can be used when the interfering cell transmits data; or, may be adopted when the interfering cell transmits data.
  • the higher order modulation method of the highest order modulation method among multiple modulation methods is: a highest-order modulation mode among multiple modulation modes that can be used when the interfering cell transmits data; or, may be adopted when the interfering cell transmits data.
  • the preset interference mode used by the interfering cell to transmit data is 64QAM or 256QAM.
  • the joint detection module 13 performs a joint detection on the signal of the serving cell and the signal of the interfering cell by using a maximum likelihood detection algorithm.
  • the foregoing functional modules may be implemented by a physical device such as a hardware processor.
  • the embodiment of the invention also provides a signal detecting device, see FIG. 4.
  • the signal detecting device can be, for example, a user equipment.
  • the processor 600 is configured to read a program in the memory 620 and perform the following process:
  • the parameter of the interfering cell determined by the blind detection, the modulation mode adopted by the preset interfering cell transmission data, the signal of the serving cell and the signal of the interfering cell Conduct joint testing.
  • the transceiver 610 is configured to receive signals of the serving cell and the interfering cell under the control of the processor 600, and output a detection result of the serving cell signal.
  • processor 600 is further configured to:
  • the detection result of the serving cell signal is separated and outputted from the result of joint detection of the signal of the serving cell and the signal of the interfering cell.
  • the modulation mode used by the preset interfering cell to transmit data is: a highest-order modulation mode among multiple modulation modes that can be used when the interfering cell transmits data; or, may be adopted when the interfering cell transmits data.
  • the higher order modulation method of the highest order modulation method among multiple modulation methods is: a highest-order modulation mode among multiple modulation modes that can be used when the interfering cell transmits data; or, may be adopted when the interfering cell transmits data.
  • the preset interference mode used by the interfering cell to transmit data is 64QAM or 256QAM.
  • the processor 600 performs joint detection on the signal of the serving cell and the signal of the interfering cell by using a maximum likelihood detection algorithm.
  • the bus architecture can include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 600 and various circuits of memory represented by memory 620.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • Transceiver 610 can be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices on a transmission medium.
  • the user interface 630 may also be an interface capable of externally connecting the required devices, including but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.
  • the processor 600 is responsible for managing the bus architecture and general processing, and the memory 620 can store data used by the processor 600 in performing operations.
  • the processor 600 may be a central buried device (CPU), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or a complex programmable logic device ( Complex Programmable Logic Device, CPLD), etc.
  • CPU central buried device
  • ASIC application specific integrated circuit
  • FPGA field-programmable gate array
  • CPLD complex programmable logic device
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that the computer Or performing a series of operational steps on other programmable devices to produce computer-implemented processing such that instructions executed on a computer or other programmable device are provided for implementing a block in a flow or a flow and/or block diagram of the flowchart Or the steps of the function specified in multiple boxes.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
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  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

L'invention concerne un procédé et un appareil de détection de signal permettant de réduire la complexité de la détection de signal, d'améliorer l'efficacité de la détection de signal, et de réduire la consommation d'énergie d'un appareil de détection de signal. La présente invention concerne un procédé de détection de signal, consistant à : réaliser une estimation de canal sur des signaux provenant d'une cellule de desserte et d'une cellule parasite, ce qui permet d'obtenir respectivement une valeur d'estimation de canal de la cellule de desserte, et une valeur d'estimation de canal de la cellule parasite ; déterminer des paramètres de la cellule parasite au moyen d'une détection aveugle ; et selon la valeur d'estimation de canal de la cellule de desserte et la valeur d'estimation de canal de la cellule parasite, les paramètres de la cellule parasite tels que déterminés au moyen d'une détection aveugle, et un mode de modulation prédéfini utilisé dans la transmission de données de la cellule parasite, détecter conjointement les signaux provenant de la cellule de desserte et de la cellule parasite.
PCT/CN2017/071500 2016-01-28 2017-01-18 Procédé et appareil de détection de signal WO2017129009A1 (fr)

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