CN113923786A - Communication multiple access method - Google Patents

Communication multiple access method Download PDF

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Publication number
CN113923786A
CN113923786A CN202111336116.9A CN202111336116A CN113923786A CN 113923786 A CN113923786 A CN 113923786A CN 202111336116 A CN202111336116 A CN 202111336116A CN 113923786 A CN113923786 A CN 113923786A
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CN
China
Prior art keywords
filter
frequency
multiple access
spatial
access method
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Pending
Application number
CN202111336116.9A
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Chinese (zh)
Inventor
夏波
钱磊
付文明
李健
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China Hui Construction Technology Co ltd
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China Hui Construction Technology Co ltd
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Priority to CN202111336116.9A priority Critical patent/CN113923786A/en
Publication of CN113923786A publication Critical patent/CN113923786A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/068—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission using space frequency diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03828—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/046—Wireless resource allocation based on the type of the allocated resource the resource being in the space domain, e.g. beams
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Power Engineering (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses a communication multiple access method, which comprises the following steps: allocating resources to a plurality of user terminals for each space and frequency; performing discrete fourier transform on a transmission symbol composed of a plurality of sub-symbols and transmitted according to space and frequency resources allocated in a space unit; and applying a frequency filter and a spatial filter to the fourier transform result, wherein the applying the frequency filter and the spatial filter are spatial units, the pulse shaping filter according to the arrangement position of the allocated frequency resources provides a multiple access method in the wireless communication system, and is used to selectively apply the selected pulse shaping filter to samples resulting from fourier transform of the sub-symbols in the frequency domain. The communication multiple access method of the present invention can reduce interference between subcarriers by selecting and using a pulse shaping filter according to the arrangement position of resources allocated for each frequency without using a fixed pulse shaping filter.

Description

Communication multiple access method
Technical Field
The present invention relates to a multiple access method used in a wireless communication system, and more particularly, to a multiple access method in a wireless communication system capable of providing ultra-low delay, high reliability, and high capacity services.
Background
The multiple access technique is considered as a sign of each generation of mobile communication system. In a fourth generation mobile communication network represented by the LTE standard, a single carrier frequency division multiple access (SC-FDMA) technology is used for an uplink, and an orthogonal frequency division multiplexing multiple access (OFDMA) technology is used for a downlink. Both of these multiple access techniques are only suitable for multi-user access in a single application scenario, such as conventional voice data communication. The main motivation for future mobile communication development is internet of things (IoT) and machine-to-machine communication (M2M), such as in-vehicle communication. The next generation wireless communication network features that multiple application scenarios (or multiple services) are commonly accessed to the same network, and these application scenarios may be high-speed data communication (high-speed communication in Gbps magnitude), traditional voice communication, IoT communication, and vehicle-mounted communication. Each communication can be considered an application scenario, and the signals of different application scenarios are very different.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a multiple access method for use in a wireless communication system, which is capable of providing ultra-low delay, high reliability and high capacity services.
In order to achieve the purpose, the invention is realized by the following technical scheme:
according to an embodiment of the invention, the method comprises: allocating resources to a plurality of user terminals for each space and frequency; performing discrete fourier transform on a transmission symbol composed of a plurality of sub-symbols and transmitted according to space and frequency resources allocated in a space unit; and applying a frequency filter and a spatial filter to the fourier transform result, wherein the applying the frequency filter and the spatial filter are spatial units, a pulse shaping filter according to an arrangement position of the allocated frequency resources provides a multiple access method in the wireless communication system, and serves to selectively apply the selected pulse shaping filter to samples resulting from fourier transform of the sub-symbols in the frequency domain.
Further, according to another embodiment of the present invention, the method includes: allocating resources to a plurality of user terminals for each space and frequency; performing discrete fourier transform on a transmission symbol composed of a plurality of sub-symbols and transmitted according to space and frequency resources allocated in a space unit; and applying a frequency filter and a spatial filter to samples resulting from a fourier transform of the sub-symbols in the frequency domain, the wireless communication system comprising a frequency equalization filter and a pulse shaping filter.
Wherein the resource allocator is configured to allocate resources for a plurality of user terminals, pointing to each space and frequency;
a Fourier transform unit including a plurality of sub-symbols and performing discrete Fourier transform on transmission symbols transmitted according to allocated space and frequency resources in units of space;
and a filtering unit that selects a pulse shaping filter according to an arrangement position of the allocated frequency resources in the spatial unit and applies the selected pulse shaping filter to samples that are a result of fourier transform of the sub-symbols in a frequency domain.
The communication multiple access method of the invention has the following beneficial effects:
according to the communication multiple access method of the present invention, it is possible to reduce interference between subcarriers by selecting and using a pulse shaping filter according to the arrangement position of resources allocated for each frequency without using a fixed pulse shaping filter. Further, according to the communication multiple access method of the present invention, it is possible to provide high beamforming resolution and excellent out-of-band channel performance by applying a frequency filter and a spatial filter in units of samples.
Drawings
Fig. 1 is a schematic block diagram of the structure of the multiple access method of the present invention.
Detailed Description
The following examples are provided to more clearly illustrate the technical solutions of the present invention, and should not be construed as limiting the scope of the present invention.
Example 1
A communication multiple access method comprises a plurality of user terminal resources, and specifically comprises the following steps:
(1) a phase of allocation according to space and frequency;
(2) a stage of discrete Fourier transform by taking the space as a unit according to the transmission symbol transmitted by the allocated space and frequency resources;
(3) the application stage of the Fourier transform result including frequency filter and space filter;
the application stage of the frequency filter and the spatial filter is the spatial unit, a pulse shaping filter is selected according to the configuration position of the frequency resource, and the sub-symbols are converted into the result samples of the pril in the frequency region.
Based on the above, the frequency filter and the spatial filter have four stages, namely, an SRRC filter, a left key SRRC filter, a right key SRRC filter, and a four corner filter.
And using the frequency filter and the spatial filter, if the frequency resource allocation index of the same user terminal is continuous, performing pulse shaping filtering in the sample according to the sequence of the left key SRRC filter and the right key SRRC filter. And a stage of using the frequency filter and the spatial filter, if the number of the continuous allocation indexes exceeds 3, at least one of the four corner filters is arranged between the left key SRRC filter and the right key SRRC filter. Using the above frequency filter and spatial filter, if the frequency resource allocation index for the same user terminal is not consecutive, then the above SRRC filter is utilized.
The stage of using the frequency filter and the space filter is the stage of applying a frequency equivalent filter to the samples according to the channel state information of the user terminal; and a stage of applying a spatial filter to the samples according to the channel state information of the user terminal.
The discrete fourier transform is performed to M-point FFT, where M corresponds to the number of sub-symbols.
The modulation scheme is determined based on the sub-symbol, and the modulation index and the spatial filter are determined at the same time in order to reduce the power to the transmission symbol. The sub-symbols are QAM data.
Example 2
A communication multiple access method comprises a plurality of user terminal resources, and specifically comprises the following steps:
(1) a phase of allocation according to space and frequency;
(2) a stage of discrete Fourier transform by taking the space as a unit according to the transmission symbol transmitted by the allocated space and frequency resources;
(3) for the result sample of the conversion of the sub-symbol to the frequency region, the application stage of the frequency filter and the space filter is included, and the frequency filter includes a frequency equivalent filter and a pulse shaping filter;
the stage of adopting the above-mentioned frequency filter and space filter is that the above-mentioned space is the unit, choose the pulse shaping filter according to the disposition position of the above-mentioned frequency resource, apply the stage of the selected pulse shaping filter to the above-mentioned sample; a stage of applying a frequency equalizer to the samples according to the channel state information of the user terminal; and a stage of applying a spatial filter to the samples according to the channel state information of the user terminal.
The spatial filter for minimizing transmission power is determined by using a modulation index set for the frequency and spatial resources; and utilizing the spatial filter in the modulation index stage including updating the transmission power minimization.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A communication multiple access method comprising a plurality of user terminal resources, comprising the steps of:
(1) a phase of allocation according to space and frequency;
(2) a stage of discrete Fourier transform in the unit of the space according to the transmission symbol transmitted by the allocated space and frequency resources;
(3) an application phase comprising a frequency filter and a spatial filter on the result of said fourier transform;
and selecting a pulse shaping filter according to the configuration position of the frequency resource, wherein the application stages of the frequency filter and the spatial filter are the spatial unit, and the subsymbols are converted into result samples of the pril in a frequency region.
2. A communication multiple access method according to claim 1, wherein the frequency filter and the spatial filter are in stages of four, an SRRC filter, a left key SRRC filter, a right key SRRC filter and a four corner filter.
3. A communication multiple access method according to claim 2, characterized in that the stage of using said frequency filter and spatial filter performs pulse-shaping filtering in said samples according to the order of the SRRC filter for left key and the SRRC filter for right key if the frequency resource allocation index for the same user terminal persists.
4. A communication multiple access method according to claim 3, characterized in that in the stage of using said frequency filter and spatial filter, if the number of said consecutive assigned indices exceeds 3, at least one of said four corner filters is arranged between said left key SRRC filter and said right key SRRC filter.
5. A communication multiple access method according to claim 1, characterized in that, using said stages of frequency and spatial filters, said SRRC filter is utilized if the frequency resource allocation indices to the same user terminal are not consecutive.
6. A communication multiple access method according to claim 1, wherein the stage of applying the frequency filter and the spatial filter is a stage of applying a frequency equivalent filter to the samples based on channel state information for the user terminal; and a stage of applying a spatial filter to the samples according to the channel state information of the user terminal.
7. A communication multiple access method according to claim 1, wherein said discrete fourier transform is an M-point FFT, said M corresponding to said number of sub-symbols.
8. The communication multiple access method of claim 1, wherein a modulation scheme is determined based on the sub-symbols, and wherein a modulation index and the spatial filter are determined simultaneously to reduce power to the transmission symbols.
9. A communication multiple access method according to claim 8, characterized in that said sub-symbols are preferably QAM data.
10. A communication multiple access method comprising a plurality of user terminal resources, comprising the steps of:
(1) a phase of allocation according to space and frequency;
(2) a stage of discrete Fourier transform in the unit of the space according to the transmission symbol transmitted by the allocated space and frequency resources;
(3) for the result samples of the conversion of the sub-symbols into frequency regions, including the application phases of frequency filters and spatial filters, the frequency filters including frequency equivalence filters and pulse shaping filters;
the stage of adopting the frequency filter and the space filter is a stage of selecting a pulse shaping filter according to the configuration position of the frequency resource by taking the space as a unit and applying the selected pulse shaping filter to the sample; a stage of applying a frequency equalizer to the sample according to the channel state information of the user terminal; and a stage of applying a spatial filter to the samples according to the channel state information of the user terminal; determining the spatial filter that minimizes transmission power using a modulation index set for the frequency and spatial resources; and utilizing the spatial filter in the above modulation index stage including updating the transmit power minimization.
CN202111336116.9A 2021-11-12 2021-11-12 Communication multiple access method Pending CN113923786A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111336116.9A CN113923786A (en) 2021-11-12 2021-11-12 Communication multiple access method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111336116.9A CN113923786A (en) 2021-11-12 2021-11-12 Communication multiple access method

Publications (1)

Publication Number Publication Date
CN113923786A true CN113923786A (en) 2022-01-11

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Application Number Title Priority Date Filing Date
CN202111336116.9A Pending CN113923786A (en) 2021-11-12 2021-11-12 Communication multiple access method

Country Status (1)

Country Link
CN (1) CN113923786A (en)

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