WO2018161875A1 - Procédé et dispositif de modulation de données pour une sous-bande périphérique et support de stockage informatique - Google Patents

Procédé et dispositif de modulation de données pour une sous-bande périphérique et support de stockage informatique Download PDF

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Publication number
WO2018161875A1
WO2018161875A1 PCT/CN2018/078049 CN2018078049W WO2018161875A1 WO 2018161875 A1 WO2018161875 A1 WO 2018161875A1 CN 2018078049 W CN2018078049 W CN 2018078049W WO 2018161875 A1 WO2018161875 A1 WO 2018161875A1
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Prior art keywords
data
subcarrier
subcarriers
frequency resource
edge
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PCT/CN2018/078049
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English (en)
Chinese (zh)
Inventor
边峦剑
辛雨
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中兴通讯股份有限公司
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Publication of WO2018161875A1 publication Critical patent/WO2018161875A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2626—Arrangements specific to the transmitter only
    • H04L27/2627—Modulators
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2649—Demodulators

Definitions

  • the present application relates to the field of multi-carrier technologies, and in particular, to a data modulation method and apparatus for an edge sub-band of a multi-carrier system, and a computer storage medium.
  • LTE Long Term Evolution
  • UMTS Universal Mobile Telecommunications System
  • 3GPP 3rd Generation Partnership Project
  • OFDM Orthogonal Frequency Division Multiplexing
  • the time-frequency resources composed of subcarriers and OFDM symbols form the wireless physical time-frequency resources of the LTE system.
  • the out-of-band leakage of the LTE system is relatively large, so the two ends of the transmission band often have a frequency to be used as a guard interval to reduce the influence of the out-of-band leakage on the adjacent frequency band. In this way, the transmission band is wasted to a certain extent, and the spectrum utilization efficiency is reduced.
  • an embodiment of the present application provides a data modulation method and apparatus for an edge subband, and a computer storage medium, which enable a multicarrier system to effectively utilize edge subbands of a transmission band and control the influence of out-of-band leakage.
  • the data is modulated according to the location of the selected subcarrier.
  • a selecting unit configured to select a subcarrier on an edge subband of the transmission band, wherein a location of the subcarrier characterizes modulation information
  • a modulation unit configured to modulate data according to a location of the selected subcarrier.
  • the embodiment of the present application further provides a computer storage medium storing a computer program configured to perform the data modulation method of the edge sub-band.
  • a subcarrier is selected on an edge subband of a transmission frequency band, where a location of the subcarrier represents modulation information; and data is modulated according to a location of the selected subcarrier.
  • the amount of modulation information can be increased while reducing the subcarrier load, the transmission power can be reduced, and the influence of out-of-band leakage can be controlled, so that the multi-carrier system can reduce or omit the band guard interval and effectively utilize the edge sub-band of the transmission band.
  • FIG. 1 is a schematic flowchart 1 of a data modulation method for an edge subband according to an embodiment of the present application
  • FIG. 2 is a second schematic flowchart of a data modulation method for an edge subband according to an embodiment of the present application
  • FIG. 3 is a schematic flowchart 3 of a data modulation method for an edge subband according to an embodiment of the present application
  • FIG. 4 is a schematic flowchart of a data modulation method for an edge subband of a 5 MHz bandwidth multi-carrier system according to an embodiment of the present application
  • FIG. 5 is a schematic flowchart of a data modulation method for an edge subband of another 5 MHz bandwidth multi-carrier system according to an embodiment of the present application
  • FIG. 6 is a schematic structural diagram of a data modulation apparatus for an edge subband according to an embodiment of the present application.
  • the embodiment of the present application proposes a data modulation method and apparatus for an edge subband of a multi-carrier system, so that the multi-carrier system can effectively utilize edge subbands of the transmission band and control the influence of out-of-band leakage.
  • Multi-carrier system A system that uses multiple sub-carriers to transmit data, such as an OFDM system.
  • Transmitting Node In the embodiment of the present application, the following transmitting devices are collectively referred to as a transmitting node: a base station, a terminal, a relay, a transmitting point, and the like.
  • FIG. 1 is a schematic flowchart 1 of a data modulation method for an edge subband according to an embodiment of the present application. As shown in FIG. 1, the data modulation method of the edge subband includes the following steps:
  • Step 101 Select a subcarrier on an edge subband of a transmission band, wherein a location of the subcarrier characterizes modulation information.
  • the location of the subcarrier represents modulation information, including:
  • the position of a single subcarrier characterizes one modulation information, or the combination of locations of multiple subcarriers characterizes one modulation information.
  • the selecting a subcarrier on an edge subband of a transmission band includes:
  • the subcarriers are selected within 2 N+1 subcarriers of the edge subband of the transmission band, the N taking a natural number, or the N taking a positive odd number.
  • Step 102 Modulate data according to the location of the selected subcarrier.
  • the selected subcarriers within 2 N + 1 subcarriers in the transmission band of the edge sub-band for the 2 N + 1 sub-carriers determine the corresponding relationship between the position of the subcarrier data; based on the sub- Corresponding relationship between the location of the carrier and the data, and selecting corresponding subcarriers for the data to be transmitted.
  • subcarriers are selected for the data to be transmitted in the 2N+1 subcarriers on one time domain symbol.
  • the number of subcarriers selected on different time domain symbols is the same or different, and the subcarrier positions selected on different time domain symbols are the same or different.
  • the edge subband is divided into multiple time-frequency resource blocks; for each time-frequency resource block, the correspondence between the location of the sub-carriers in the time-frequency resource block and the data is determined; Corresponding relationship between the location of the subcarrier and the data, selecting a corresponding subcarrier for the data to be transmitted; mapping the data to be transmitted to the selected subcarrier.
  • the dividing the edge subband into multiple time-frequency resource blocks includes:
  • the edge sub-band is divided into p time-frequency resource blocks, and p is an integer greater than or equal to 1, wherein different time-frequency resource blocks include the same or different number of sub-carriers.
  • the data amounts of the data to be transmitted loaded by different time-frequency resource blocks are the same or different.
  • the selecting a corresponding subcarrier for the data to be transmitted includes:
  • Selecting subcarriers on time domain symbols of the time-frequency resource block for data to be transmitted wherein the number of subcarriers selected on different time domain symbols is the same or different, and the selected subcarrier positions on different time domain symbols are the same Or different.
  • FIG. 2 is a schematic flowchart 2 of a data modulation method for an edge subband according to an embodiment of the present application.
  • the data modulation method in this example is applied to a transmitting node.
  • the data modulation method of the edge subband includes the following steps. :
  • Step 201 Determine a correspondence between the subcarrier position and the data for 2 N+1 subcarriers of the edge subband.
  • the edge sub-band is at an edge position of the transmission band in the frequency domain.
  • the edge subband may be an edge subband at one end of the transmission band or an edge subband at both ends of the transmission band.
  • 2 N+1 subcarriers of the edge subband where N takes a natural number, or N takes a positive odd number.
  • 2 N+1 subcarriers may modulate N+1 bit information. Therefore, when N takes a natural number, 2 N+1 subcarriers can modulate an integer number of bit information; when N takes a positive odd number, 2 N+1 subcarriers can modulate an even number of bit information, which is advantageous for matching existing channel coding techniques. .
  • the determining the correspondence between the subcarrier position and the data includes: the location of the single subcarrier characterizes one modulation information, that is, the single subcarrier corresponding to k data; or the location combination of the multiple subcarriers represents a modulation information. That is, a combination of multiple subcarriers corresponds to k data; where k>0.
  • the data may be digital bit information with a value of 0 or 1, or may be binary phase shift keying (BPSK, Binary Phase Shift Keying) or quadrature phase shift keying (QPSK, Quadrature Phase Shift Keyin).
  • Digital modulation information such as Quadrature Amplitude Modulation (QAM) can also be other data forms, which are collectively referred to herein as data.
  • Step 202 Select a corresponding subcarrier for the data to be transmitted according to the correspondence between the location of the subcarrier and the data.
  • the subcarriers are selected for the data to be transmitted in the 2N+1 subcarriers on one time domain symbol.
  • Step 203 Map the data to be transmitted onto the selected subcarrier.
  • the selected subcarrier load data is on the edge subband; the unselected subcarriers on the edge subband do not load data.
  • FIG. 3 is a schematic flowchart 3 of a data modulation method for an edge subband according to an embodiment of the present application.
  • the data modulation method in this example is applied to a transmitting node.
  • the data modulation method of the edge subband includes the following steps. :
  • Step 301 Divide the edge subband into multiple time-frequency resource blocks.
  • the edge sub-band is at an edge position of the transmission band in the frequency domain.
  • the edge subband may be an edge subband at one end of the transmission band or an edge subband at both ends of the transmission band.
  • the edge subband includes k subcarriers, and k is an integer greater than or equal to 1.
  • the edge sub-band is divided into p time-frequency resource blocks, and p is an integer greater than or equal to 1; wherein different time-frequency resource blocks include the same or different number of sub-carriers.
  • Step 302 Determine, for each time-frequency resource block, a correspondence between the location of the sub-carriers in the time-frequency resource block and the data.
  • the data may be digital bit information with a value of 0 or 1, or may be binary phase shift keying (BPSK, Binary Phase Shift Keying) or quadrature phase shift keying (QPSK, Quadrature Phase Shift Keyin).
  • Digital modulation information such as Quadrature Amplitude Modulation (QAM) can also be other data forms, which are collectively referred to herein as data.
  • a corresponding relationship between the sub-carrier position and the data in the time-frequency resource block is respectively determined; wherein, the position of the single sub-carrier represents a modulation information, that is, a single sub-carrier corresponding to k data, Or the location combination of multiple subcarriers characterizes one modulation information, that is, the combination of multiple subcarriers corresponds to k data, where k>0.
  • the combination of the plurality of subcarriers characterization that one modulation information may be a combination of 2 subcarriers characterizing one modulation information, or a combination of 3 subcarriers characterizing one modulation information, or a combination of 4 subcarriers characterizing a modulation information, etc. This type of push.
  • the correspondence between the subcarrier position and the data is not limited to be determined in a single time-frequency resource block, and the multiple time-frequency resource blocks may be combined to determine the subcarrier position in the joint time-frequency resource block.
  • the correspondence of the data is not limited to be determined in a single time-frequency resource block, and the multiple time-frequency resource blocks may be combined to determine the subcarrier position in the joint time-frequency resource block.
  • Step 303 Select a corresponding subcarrier for the data to be transmitted according to the corresponding relationship between the subcarrier position and the data.
  • the subcarriers are selected on the time domain symbols for the data to be transmitted.
  • subcarriers are selected in the frequency domain of the time domain symbols.
  • the number of subcarriers selected on different time domain symbols is the same or different; the subcarrier positions selected on different time domain symbols are the same or different.
  • Step 304 Map the data to be transmitted onto the selected subcarrier.
  • the selected subcarriers on the edge subband load data to be transmitted; the unselected subcarriers on the edge subband do not load data.
  • the data amounts of the data to be transmitted loaded by different time-frequency resource blocks are the same or different.
  • the time domain OFDM symbol of the load reference signal includes, but is not limited to, the following two processing methods: 1.
  • the edge subband of the OFDM symbol of the load reference signal no longer loads data; 2.
  • the OFDM of the load reference signal The edge subband of the symbol carries the data, and the data is modulated according to steps 201-204 by using the subcarrier position other than the reference signal.
  • FIG. 4 is a schematic flowchart of a data modulation method for an edge sub-band of a 5 MHz bandwidth multi-carrier system according to an embodiment of the present disclosure.
  • a transmission frequency band of 5 MHz bandwidth occupies a total of 300 sub-carrier frequency domain resources.
  • the data is transmitted, and the edge subbands of 16 subcarriers are respectively left at both ends of the transmission band, wherein the subcarrier spacing is 15 kHz.
  • the data modulation method of the edge subband includes the following steps:
  • Step 401 Determine a correspondence between the subcarrier position and the data for the 16 subcarriers of the edge subband.
  • the location of a single subcarrier characterizes one modulation information. Since the edge subband contains 16 subcarriers with 16 different single subcarrier positions, the single subcarrier position corresponds to 4 bits of information. Table 1 gives an example of the correspondence between a single subcarrier position and bit information.
  • Step 402 Select a corresponding subcarrier for the data to be transmitted according to the correspondence between the location of the subcarrier and the data.
  • Step 403 Map the data to be transmitted onto the selected subcarrier.
  • the QPSK data to be transmitted is to be transmitted.
  • the other subcarriers on the edge subband do not transmit data. Therefore, the 4th subcarrier also indicates bit data 0, 0, 1, 1 while loading the QPSK information.
  • FIG. 5 is a schematic flowchart of a data modulation method for an edge subband of a 5 MHz bandwidth multi-carrier system according to an embodiment of the present application.
  • the data modulation method in this example is applied to a transmitting node, as shown in FIG. 5, the edge sub-
  • the data modulation method of the band includes the following steps:
  • Step 501 Divide an edge subband of a 5 MHz bandwidth multi-carrier system into a plurality of time-frequency resource blocks.
  • the 5 MHz bandwidth LTE system occupies a total of 300 subcarriers of frequency domain resources for transmitting data, and the edge subbands of the remaining 33 subcarriers are vacated at both ends of the transmission band as a guard interval, where the subcarriers The interval is 15 kHz.
  • the edge subband including 33 subcarriers is divided into 4 time-frequency resource blocks, and each time-frequency resource block includes 8 sub-carriers.
  • Step 502 Determine, for each time-frequency resource block, a correspondence between a sub-carrier position and a data in the time-frequency resource block.
  • the correspondence between the location of the sub-carriers in each time-frequency resource block and the data is determined.
  • Table 2 shows the correspondence between the location of a single subcarrier and the QPSK data.
  • the data corresponding to the subcarrier position may further include: bit data of 0 or 1, digital modulated data such as BPSK, QAM, and other forms of data.
  • Step 503 Select a corresponding subcarrier on the OFDM symbol for the data to be transmitted according to the corresponding relationship between the subcarrier position and the data.
  • the subcarriers corresponding to the selected location include, but are not limited to, the following method: selecting the subcarriers by using the second and fourth data. According to the correspondence of Table 2 in step 502, the third and sixth subcarrier load data should be selected.
  • Step 504 Map the data to be transmitted onto the selected subcarrier.
  • the first and third data are respectively mapped to the subcarriers 3 and 6, and at the same time, the subcarriers 3 and 6 respectively indicate the data.
  • the embodiment is not limited to a multi-carrier system with a bandwidth of 5 MHz, and a multi-carrier system of any numerical bandwidth such as 2.5 MHz, 10 MHz, 20 MHz, or 100 MHz.
  • the data modulation method of the edge sub-band described in this embodiment can be used.
  • FIG. 6 is a schematic structural diagram of a data modulation apparatus for an edge subband according to an embodiment of the present application. As shown in FIG. 6, the apparatus includes:
  • the selecting unit 41 is configured to select a subcarrier on an edge subband of the transmission band, wherein the location of the subcarrier represents modulation information;
  • Modulation unit 42 is configured to modulate data based on the location of the selected subcarrier.
  • the location of the subcarrier represents the modulation information, including:
  • the position of a single subcarrier characterizes one modulation information, or the combination of locations of multiple subcarriers characterizes one modulation information.
  • the selecting unit 41 is configured to select a subcarrier within 2 N+1 subcarriers of an edge subband of a transmission band, where the N takes a natural number, or the N takes a positive odd number.
  • the device further includes:
  • the dividing unit 43 is configured to divide the edge subband into a plurality of time-frequency resource blocks
  • the determining unit 44 is configured to determine a correspondence between the location of the subcarriers in the time-frequency resource block and the data for each time-frequency resource block;
  • the selecting unit 41 is configured to select a corresponding subcarrier for the data to be transmitted based on the correspondence between the location of the subcarrier and the data;
  • the modulating unit 42 is configured to map the data to be transmitted onto the selected subcarrier.
  • the dividing unit 43 is configured to divide the edge subband into p time-frequency resource blocks, where p is an integer greater than or equal to 1, wherein different time-frequency resource blocks include the same number of sub-carriers or different numbers. .
  • the data amounts of the data to be transmitted loaded by different time-frequency resource blocks are the same or different.
  • the selecting unit 41 is configured to select subcarriers on the time domain symbols of the time-frequency resource block for the data to be transmitted, where the number of subcarriers selected on different time domain symbols is the same or Differently, the subcarrier positions selected on different time domain symbols are the same or different.
  • the selecting unit 41, the dividing unit 43, and the determining unit 44 can all pass through a central processing unit (CPU) or a microprocessor (Micro Processor Unit) in the data modulation device located in the edge subband. MPU), or a digital signal processor (DSP), or a Field Programmable Gate Array (FPGA).
  • the modulation unit 42 can be implemented by a modem.
  • each unit in the data modulation apparatus of the edge sub-band shown in FIG. 6 can be realized by a program running on a processor, or can be realized by a specific logic circuit.
  • embodiments of the present application can be provided as a method, system, or computer program product. Accordingly, the application can take the form of a hardware embodiment, a software embodiment, or an embodiment in combination with software and hardware. Moreover, the application 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 a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.
  • the embodiment of the present application further provides a computer storage medium, wherein a computer program configured to perform the data modulation method of the edge sub-band of the embodiment of the present application is stored.
  • a subcarrier is selected on an edge subband of a transmission band, where a location of the subcarrier represents modulation information, and data is modulated according to a location of the selected subcarrier.
  • the amount of modulation information can be increased while reducing the subcarrier load, the transmission power can be reduced, and the influence of out-of-band leakage can be controlled, so that the multi-carrier system can reduce or omit the band guard interval and effectively utilize the edge sub-band of the transmission band.

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
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Abstract

L'invention porte sur un procédé et un dispositif de modulation de données pour une sous-bande périphérique, ainsi que sur un support de stockage informatique. Le procédé consiste à : sélectionner une sous-porteuse sur une sous-bande périphérique d'une bande de fréquences de transmission, la position de la sous-porteuse caractérisant des informations de modulation ; et en fonction de la position de sous-porteuse sélectionnée, moduler des données.
PCT/CN2018/078049 2017-03-06 2018-03-05 Procédé et dispositif de modulation de données pour une sous-bande périphérique et support de stockage informatique WO2018161875A1 (fr)

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CN201710127897.8A CN108540418B (zh) 2017-03-06 2017-03-06 一种边缘子带的数据调制方法及装置
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