WO2023239273A1 - Procédé de précodage d'un paquet de données pour un agencement d'émetteur et de récepteur à antennes multiples, produit programme informatique, support de stockage lisible par ordinateur non transitoire, agencement d'émetteur et de récepteur à antennes multiples, dispositif sans fil et nœud émetteur-récepteur - Google Patents

Procédé de précodage d'un paquet de données pour un agencement d'émetteur et de récepteur à antennes multiples, produit programme informatique, support de stockage lisible par ordinateur non transitoire, agencement d'émetteur et de récepteur à antennes multiples, dispositif sans fil et nœud émetteur-récepteur Download PDF

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Publication number
WO2023239273A1
WO2023239273A1 PCT/SE2023/050483 SE2023050483W WO2023239273A1 WO 2023239273 A1 WO2023239273 A1 WO 2023239273A1 SE 2023050483 W SE2023050483 W SE 2023050483W WO 2023239273 A1 WO2023239273 A1 WO 2023239273A1
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WO
WIPO (PCT)
Prior art keywords
data packet
coding
receiver arrangement
beamwidth
packet type
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PCT/SE2023/050483
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English (en)
Inventor
Joakim Axmon
Bengt Lindoff
Original Assignee
Beammwave Ab
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Publication date
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Publication of WO2023239273A1 publication Critical patent/WO2023239273A1/fr

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Classifications

    • 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
    • H04B7/0408—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more beams, i.e. beam diversity
    • 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
    • H04B7/0615—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 of weighted versions of same signal
    • H04B7/0617—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 of weighted versions of same signal for beam forming

Definitions

  • the present disclosure relates to a method of pre-coding a data packet for a multiantenna transmitter and receiver arrangement, a computer program product, a non-transitory computer-readable storage medium, a multi-antenna transmitter and receiver arrangement, a wireless device, and a transceiver node.
  • MIMO multiple-input multiple-output
  • beamforming systems i.e., where a communication between transmission nodes using multiple transmit and receive antennas is performed
  • one often utilizes reciprocity of the channel in the communication meaning that the beamforming weights used for reception is reused when transmitting.
  • Reciprocity is especially utilized if the beamforming architecture is based on analog or hybrid beamforming, i.e., where beamforming is performed using analog phase shifters. In this case, the beam directions are limited and the time for beam switching is typically long and therefore for reduced complexity the same beamforming weights are used for transmission and reception.
  • EP 3304969 Al discloses a method for transmitting data by a transmission node in a wireless communication system.
  • the method includes transmitting, to a base station, a channel information request, transmitting, to the base station, a data packet based on a first channel information value received in response to the transmitted channel information request, and awaiting reception of a response packet indicating reception of the data packet from the base station, if the reception of the response packet fails during a predetermined time interval, detecting an energy level of a signal received in the predetermined time interval, and reconfiguring one of a transmitting method for the response packet and a transmitting method for a next data packet based on the detected energy level.
  • US 20130294369 Al discloses that a base station receives channel state information from a wireless device.
  • the base station transmits to the wireless device one or more data packets on a data channel employing a first precoding matrix identifier.
  • the base station transmits one or more control packets on a control channel to the wireless device employing a second precoding matrix.
  • the radio channel(s) comprises multi-path Non-Line-of-Sight (NLOS) signals from different (e.g., non-adjacent) directions.
  • NLOS Non-Line-of-Sight
  • An object of the present disclosure is to mitigate, alleviate or eliminate one or more of the above-identified deficiencies and disadvantages in the prior art and solve at least the above-mentioned problem.
  • a method for a multi-antenna transmitter and receiver arrangement comprising: obtaining a data packet type for a data packet to be transmitted to a remote TNode; determining if the data packet to be transmitted is of a first data packet type or a second data packet type, different from the first data packet type; pre-coding the data packet to be transmitted based on the obtained data packet type, wherein pre-coding comprises: performing pre-coding in a first pre-coding mode associated with a first beamwidth if the data packet to be transmitted is determined to be of the first data packet type; and performing precoding in a second pre-coding mode associated with a second beamwidth if the data packet to be transmitted is determined to be of the second data packet type, wherein the second pre- coding mode is different from the first pre-coding mode, and wherein the first beamwidth
  • pre-coding is further based on the obtained channel characteristics.
  • the method further comprises deriving a channel tap filter length from the obtained channel characteristics.
  • performing pre-coding in the first pre-coding mode comprises allocating a first transmit power associated with a first number of channel taps; and performing pre-coding in the second pre-coding mode comprises allocating a second transmit power associated with a second number, different from the first number, of channel taps.
  • the method further comprises deriving a time delay and optionally a coefficient from the obtained channel characteristics.
  • performing pre-coding in the first pre-coding mode comprises utilizing a first set of phase shifts, scaling factors and time delays for the data packet to be transmitted
  • performing pre-coding in the second pre-coding mode comprises utilizing a second set of phase shifts, scaling factors and time delays for the data packet to be transmitted.
  • the first and second sets of phase shifts, scaling factors and time delays are determined based on the channel tap filter length and/or the time delay and optionally the coefficient derived from the obtained channel characteristics.
  • the first data packet type is a retransmission of the data packet
  • the second data packet type is a first transmission of a data packet.
  • a data packet of the first data packet type comprises random access, common data information and/or control data
  • a data packet of the second data packet type comprises dedicated data information.
  • the method further comprises transmitting the data packet to be transmitted.
  • the pre-coding is performed in one or more of a complex frequency domain, a wavelet domain, a frequency domain, a spatial domain, and a time domain.
  • a computer program product comprising instructions, which, when executed on at least one processor of a processing device, cause the processing device to carry out the method according to the first aspect or any of the embodiments mentioned herein.
  • a non-transitory computer-readable storage medium storing one or more programs configured to be executed by one or more processors of a processing device, the one or more programs comprising instructions which, when executed by the processing device, causes the processing device to carry out the method according to the first aspect or any of the embodiments mentioned herein.
  • a multi-antenna transmitter and receiver arrangement comprising control circuitry configured to cause: obtainment of a data packet type for a data packet to be transmitted to a remote TNode; determination of if the data packet to be transmitted is of a first data packet type or a second data packet type, different from the first data packet type; and pre-coding of the data packet based on the obtained data packet type.
  • Pre-coding comprises: performing pre-coding in a first pre-coding mode, associated with a first beamwidth, if the data packet to be transmitted is determined to be of the first data packet type; and performing pre-coding in a second pre-coding mode, associated with a second beamwidth, wherein the second pre-coding mode is different from the first precoding mode, if the data packet to be transmitted is determined to be of the second data packet type, and wherein the first beamwidth comprises more spatial directions than the second beamwidth.
  • the control circuitry is further configured to cause transmission of the pre-coded data packet.
  • the multi-antenna transmitter and receiver arrangement comprises a transmitter arrangement comprising: a pre-coder configured to precode data packets in a complex frequency domain, a wavelet domain, or a frequency domain; a first beamforming processing unit configured to convert the pre-coded data packets from a complex frequency domain, a wavelet domain, or a frequency domain to a time domain; a second beamforming processing unit configured to process the pre-coded data packets in one or more of a spatial domain and a time domain to obtain digital signals; a control unit configured to determine coefficients for the first and/or the second beamforming processing unit; combiners configured to combine the digital signals to obtain combined digital signals; and conversion units configured to convert each of the (e.g., a third plurality of) combined digital signals to respective analog signals.
  • a pre-coder configured to precode data packets in a complex frequency domain, a wavelet domain, or a frequency domain
  • a first beamforming processing unit configured to convert the pre-coded data packets from a complex frequency
  • the multi-antenna transmitter and receiver arrangement comprises a receiver arrangement.
  • the receiver arrangement comprises analog to digital converters configured to convert analog radio signals into digital radio signals; an extraction unit configured to extract reference signals from each of the digital radio signals; and a channel analyzer configured to determine characteristics for each of the digital radio signals based on the extracted reference signals.
  • the multi-antenna transmitter and receiver arrangement comprises transceivers configured to transmit each of the analog signals via antenna units and optionally configured to receive analog radio signals via the antenna units.
  • the multi-antenna transmitter and receiver arrangement comprises a switch configured to switch the transceivers between the transmitter arrangement and the receiver arrangement.
  • a wireless device comprising the multi-antenna transmitter and receiver arrangement.
  • a transceiver node comprising the multi-antenna transmitter and receiver arrangement.
  • TNode transceiver node
  • Effects and features of the second, third, fourth, fifth, and sixth aspects are fully or to a substantial extent analogous to those described above in connection with the first aspect and vice versa.
  • Embodiments mentioned in relation to the first aspect are fully or largely compatible with the second, third, fourth, fifth, and sixth aspects and vice versa.
  • An advantage of some embodiments is that robustness is increased/improved (e.g., against uncertainty/variations in the radio channel).
  • Another advantage of some embodiments is a reduced complexity and/or increased flexibility, e.g., by performing beamforming in one or more domains.
  • Yet another advantage of some embodiments is that digital and/or hybrid beamforming (pre-coding) is enhanced, e.g., since beamforming (pre-coding) can be gradually adapted in the digital domain.
  • a further advantage of some embodiments is that the complexity of the beamforming processing is reduced, e.g., if some beamforming is performed in the time domain.
  • Yet a further advantage of some embodiments is that performance in uplink (UL) communication between (from) a WD/TNode, implemented with a digital BF transceiver architecture and (to) a remote TNode is improved or optimized, e.g., if data packets of a first data packet type are transmitted in one (spatial) direction and data packets of a second data packet type are transmitted in another (spatial) direction especially if the remote TNode is using an analog or hybrid BF transceiver architecture that can only receive/transmit in a single or a few spatial directions.
  • Figure 1A is a schematic drawing illustrating method steps according to some embodiments
  • Figure IB is a schematic drawing illustrating a multi-antenna transmitter and receiver arrangement according to some embodiments
  • Figure 2 is a schematic drawing illustrating a computer readable medium according to some embodiments
  • Figure 3 is a flowchart illustrating method steps implemented in a multi-antenna transmitter and receiver arrangement, or in a control unit/control circuitry thereof, according to some embodiments;
  • Figure 4 is a schematic drawing illustrating a conversion unit according to some embodiments.
  • Figure 5 is a schematic drawing illustrating a switch for switching transceivers between the transmitter arrangement and the receiver arrangement according to some embodiments; and Figure 6 is a schematic drawing illustrating a receiver arrangement connected to transceivers and antennas according to some embodiments.
  • a wireless device is any device capable of transmitting or receiving signals wirelessly.
  • Some examples of wireless devices are user equipment (UE), mobile phones, cell phones, smart phones, Internet of Things (loT) devices, vehicle-to-everything (V2X) devices, vehicle-to-infrastructure (V2I) devices, vehicle-to-network (V2N) devices, vehicle-to-vehicle (V2V) devices, vehicle-to-pedestrian (V2P) devices, vehicle- to-device (V2D) devices, vehicle-to-grid (V2G) devices, fixed wireless access (FWA) points, and tablets.
  • UE user equipment
  • V2X vehicle-to-everything
  • V2I vehicle-to-infrastructure
  • V2N vehicle-to-network
  • V2V vehicle-to-vehicle
  • V2P vehicle-to-pedestrian
  • V2D vehicle- to-device
  • V2G vehicle-to-grid
  • FWA fixed wireless
  • a TNode may be a remote radio unit (RRU), a repeater, a remote wireless node, or a base station (BS), such as a radio base station (RBS), a Node B, an Evolved Node B (eNB) or a gNodeB (gNB).
  • RRU remote radio unit
  • BS base station
  • eNB Evolved Node B
  • gNB gNodeB
  • a TNode may be a BS for a neighboring cell, a BS for a handover (HO) candidate cell, a remote radio unit (RRU), a distributed unit (DU), another WD or a base station (BS) for a (active/deactivated) secondary cell (SCell) or for a serving/primary cell (PCell, e.g., associated with an active TCI state).
  • HO handover
  • RRU remote radio unit
  • DU distributed unit
  • SCell serving/primary cell
  • PCell serving/primary cell
  • the mmW frequency range is from 24.25 Gigahertz (GHz) to 71 GHz or more generally from 24 to 300 GHz.
  • MmW may also be referred to as Frequency Range 2 (FR2).
  • the processing unit may be a digital processor.
  • the processor may be a microprocessor, a microcontroller, a central processing unit, a co-processor, a graphics processing unit, a digital signal processor, an image signal processor, a quantum processing unit, or an analog signal processor.
  • the processing unit may comprise one or more processors and optionally other units, such as a control unit.
  • a digital interface is a unit converting analog signals from e.g., transceivers to digital signals, which digital signals are conveyed to e.g., a baseband processor, and/or converting digital signals from e.g., a baseband processor to analog signals, which analog signals are conveyed to e.g., one or more transceivers.
  • a digital interface possible also comprises filters and other pre-processing functions/units.
  • An antenna unit may be one single antenna. However, an antenna unit may also be a dual antenna, such as a dual patch antenna with a first (e.g., horizontal) and a second (e.g., vertical) polarization, thus functioning as two separate antennas or an antenna unit having two ports.
  • a first e.g., horizontal
  • a second e.g., vertical
  • a chip is an integrated circuit (chip) or a monolithic integrated circuit (chip) and may also be referred to as an IC, or a microchip.
  • a filter is a device or process that removes some features, components, or frequencies from a signal.
  • a spatial direction is a direction in space.
  • the spatial direction may be a vertical direction and/or a horizontal direction (e.g., 3D MIMO).
  • a spatial direction is defined as a direction in which the beam/signal power has a local maximum, which is separated from other local maxima (i.e., other spatial directions) by at least one local minimum of the beam/signal power.
  • an adjacent/adjoining spatial direction is a direction in which the beam/signal power has a local maximum, which is separated from the local maximum of the spatial direction it is adjacent/adjoined to by one (and only one) local minimum of the beam/signal power.
  • each spatial direction is separated from the adjacent spatial direction with the same angle.
  • a channel tap is typically associated with a radio path in a particular spatial direction (whereas another channel tap is associated with a radio path in another spatial direction).
  • the channel tap is represented by a complex number.
  • analog beamforming means that the beamforming processing, e.g., multiplication of a coefficient, is performed before digital to analog conversion (DAC) for transmission (and after analog to digital conversion, ADC, for reception), i.e., in the digital domain.
  • DAC digital to analog conversion
  • ADC analog to digital conversion
  • Analog beamforming means that the beamforming processing, e.g., phase shifting, is performed after DAC for transmission (and before ADC for reception), i.e., in the analog domain.
  • Hybrid beamforming means that some beamforming processing, e.g., phase shifting, is performed after DAC and some beamforming processing, e.g., multiplication of a coefficient, is performed before DAC for transmission (and before and after ADC for reception), i.e., processing in both digital and analog domains.
  • a basic concept of the invention is to perform the transmission (TX) pre-coding, e.g., beamforming, of one or more data packet(s) in different ways depending on the type of data packet the data packet(s) belongs to.
  • TX transmission
  • pre-coding is performed in a first pre-coding mode (e.g., with a first transmit power, a first beamwidth, in a first spatial direction etc.)
  • a second pre-coding mode e.g., with a second transmit power, a second beamwidth, in a second spatial direction etc.
  • the first pre-coding mode e.g., with a first transmit power, a first beamwidth, in a first spatial direction etc.
  • second pre-coding mode e.g., with a second transmit power, a second beamwidth, in a second spatial direction etc.
  • the first pre-coding mode i.e., the first transmit power is different from the second transmit power, the first beamwidth is different from the second beamwidth, the
  • the first beamwidth is broader than the second beamwidth.
  • a narrower beamwidth i.e., the second beamwidth
  • SNR signal-to-noise ratio
  • performance in UL communication between a WD/TNode and a remote TNode is improved or optimized, e.g., if data packets of a first data packet type are transmitted in one (spatial) direction and data packets of a second data packet type are transmitted in another (spatial) direction (preferably implemented with a digital BF transceiver architecture, since analog BF can only listen/receive/transmit in a single spatial direction and hybrid BF only in a few directions/sections).
  • figure 1A illustrates method steps according to some embodiments
  • figure IB illustrates a multi-antenna transmitter and receiver arrangement according to some embodiments.
  • the method 100 is for a multiantenna transmitter and receiver arrangement 400.
  • the multi-antenna transmitter and receiver arrangement 400 is comprisable or comprised in a wireless device (WD) or in a transceiver node (TNode), i.e., in some embodiments a WD or a TNode comprises the multi-antenna transmitter and receiver arrangement 400.
  • WD wireless device
  • TNode transceiver node
  • the method 100 comprises obtaining 110 a data packet type for a data packet to be transmitted (from the multi-antenna transmitter and receiver arrangement 400, the WD or the TNode) to a remote TNode.
  • the data packet type is one of retransmission of the data packet and a first transmission of a data packet.
  • the method 100 comprises pre-coding 120 the data packet to be transmitted based on the obtained data packet type.
  • the method 100 comprises transmitting 130 (e.g., with an allocated transmission/transmit power), e.g., to a remote TNode, the data packet to be transmitted.
  • the method 100 comprises obtaining 112 channel characteristics for a plurality of radio channels between the remote TNode and the multi-antenna transmitter and receiver arrangement 400 (or between the remote TNode and a WD/TNode comprising the multi-antenna transmitter and receiver arrangement 400).
  • the channel characteristics is radio channel characteristics.
  • the pre-coding 120 is further based on the obtained channel characteristics.
  • the pre-coding 120 is based on received pilot symbols or synchronisation signal blocks (SSBs).
  • SSBs synchronisation signal blocks
  • the pre-coding 120 is based on channel tap filter length. Channel characteristics may be obtained in either frequency domain or time domain or in a combination of frequency and time domain. Channel taps etc.
  • the method 100 comprises determining 116 if the data packet to be transmitted is of a first data packet type or a second data packet type. In these embodiments, the method 100 comprises performing 122 precoding in a first pre-coding mode if the data packet to be transmitted is determined to be of a first data packet type; and performing 124 pre-coding in a second pre-coding mode if the data packet to be transmitted is determined to be of a second data packet type, different from the first data packet type.
  • the second pre-coding mode is different from the first pre-coding mode (e.g., with a different allocated transmit power and/or having a different beamwidth, or spatial directions).
  • the first data packet type is a retransmission of the data packet
  • the second data packet type is a first transmission of a data packet.
  • a data packet of the first data packet type comprises random access, common data information and/or control data
  • a data packet of the second data packet type comprises dedicated data information, e.g., only dedicated data information (and no random access, common data information or control data).
  • the determining 116 is, in some embodiments, based on an instruction or indication received from the remote TNode.
  • determining 116 is performed by determining the type of data present in a transmit buffer (i.e., a buffer comprising the data for transmission).
  • the determining 116 is based on a transmission request from a transmission controller of the multi-antenna transmitter and receiver arrangement 400 (or of the WD or TNode comprising the multi-antenna transmitter and receiver arrangement 400).
  • the method 100 comprises deriving (or obtaining or calculating) 114 a channel tap filter length from the obtained channel characteristics.
  • performing pre-coding 120 in the first pre-coding mode comprises allocating 123 a first transmit power associated with a first number of channel taps
  • performing precoding 120 in the second pre-coding mode comprises allocating 125 a second transmit power associated with a second number of channel taps.
  • the second number is different from the first number, thus, in some embodiments the first transmit power is different from the second transmit power.
  • the first and second (total) transmit power is the same (even though the second number is different from the first number).
  • the transmit power per channel tap is larger in the first pre-coding mode than in the second pre-coding mode (e.g., if the first and second transmit power is the same and the second number of channel taps is larger than the first number of channel taps).
  • the first and second numbers of channel taps are less than or equal to the channel tap filter length, i.e., the first number of channel taps is less than or equal to the channel tap filter length and the second number of channel taps is less than or equal to the channel tap filter length.
  • the first number is 1, the second number is 2 and the channel tap filter length is 2.
  • the first transmit power is higher than the second transmit power.
  • the method 100 comprises deriving (or obtaining or calculating)
  • performing pre-coding in the first pre-coding mode comprises utilizing 126 a first set of phase shifts, scaling factors and time delays for the data packet to be transmitted
  • performing pre-coding 120 in the second pre-coding mode comprises utilizing 128 a second set of phase shifts, scaling factors and time delays for the data packet to be transmitted.
  • Each of the first and second sets may comprise one or more phase shifts, one or more scaling factors and/or one or more time delays.
  • the first set is different from the second set.
  • the first and second sets of phase shifts, scaling factors and time delays are determined based on the channel tap filter length and/or the time delay and optionally the coefficient derived from the obtained channel characteristics.
  • the phase shifts of the first and second sets are determined based on the (in step 114 derived) channel tap filter length
  • the scaling factors of the first and second sets are determined based on the derived coefficient
  • the time delays of the first and second sets are determined based on the derived time delay.
  • Adapting pre-coding by changing the time-delay, coefficient and/or phase shift for (channel or filter) taps in uplink (UL) communication compared to the estimated time delay, coefficient and/or phase shift for (channel or filter) taps in downlink (DL) communication increases/improves robustness, e.g., since the risk of destructive combining at the Tnode communication is performed with (i.e., the remote TNode) is reduced, due to radio transceiver impairments (e.g., PLL phase noise) and/or channel variation due to differences between reception and transmission time and/or movement of the Tnode/WD.
  • the scaling factors may be coefficient scaling factors for scaling of coefficients, such as channel/filter coefficients or beamforming weights.
  • the first and second sets of phase shifts, scaling factors and time delays each comprises one or more of phase shifts, scaling factors and time delays, i.e., in some embodiments, the first and second sets comprises only phase shifts, only time delays or only phase shifts and time delays. In some embodiments, all scaling factors are set to 1, whereby no scaling is performed. Furthermore, in some embodiments, the scaling factors are utilized to allocate transmit power, e.g., first and/or second transmit power. Moreover, in some embodiments, the pre-coding 120 is implemented by filtering the data packet(s) with a filter comprising filter coefficients.
  • the filter coefficients may be obtained/derived/calculated based on the corresponding set of phase shifts, scaling factors and time delays (first set if in the first pre-coding mode or if the data packet is of the first data packet type and second set if in the second pre-coding mode or if the data packet is of the second data packet type).
  • the first pre-coding mode gives/has, or is associated with, a first beamwidth
  • the second pre-coding mode gives/has, or is associated with, a second beamwidth.
  • the data packet to be transmitted is pre-coded to be transmitted with a first beamwidth
  • the data packet to be transmitted is pre-coded to be transmitted with a second beamwidth.
  • the first beamwidth is different from the second beamwidth.
  • the first beamwidth comprises more spatial directions than the second beamwidth.
  • the first beamwidth is broader than the second beamwidth.
  • the second beamwidth comprises a few (e.g., 2 or 3) adjacent/adjoining spatial directions, whereas the first beamwidth comprises several (e.g., 4 or more) non-adjacent/non- adjoining spatial directions.
  • the second beamwidth comprises a few (e.g., 2 or 3) adjacent/adjoining spatial directions
  • the first beamwidth comprises several (e.g., 4 or more) spatial directions
  • one or two or more of the spatial directions of the first beamwidth are adjacent/adjoining and the rest (at least one) of the spatial directions of the first beamwidth are non-adjacent/non-adjoining (to each of the one or more adjacent/adjoining spatial directions of the first beamwidth).
  • NLOS Non-Line-of-Sight
  • the second beamwidth may be obtained by utilizing a lower number of transceivers/antennas for transmission than for the first beamwidth.
  • the second beamwidth may be obtained by utilizing less power for one or more transceivers/antennas than for the first beamwidth.
  • the second pre-coding mode does not utilize reciprocity for transmission and reception, e.g., the second pre-coding mode utilizes beamforming weights, beamwidth, or a set of phase shifts, scaling factors and/or time delays for transmission which is different from the beamforming weights, the beamwidth or the set of phase shifts, scaling factors and/or time delays utilized for reception whereas the first pre-coding mode utilizes reciprocity for transmission and reception, e.g., the first pre-coding mode utilizes the same beamforming weights, beamwidth or set of phase shifts, scaling factors and/or time delays for transmission and reception, .
  • the first pre-coding mode does not utilize reciprocity for transmission and reception
  • the second pre-coding mode utilizes reciprocity for transmission and reception.
  • the multi-antenna transmitter and receiver arrangement 400 comprises a transmitter arrangement 404.
  • the transmitter arrangement 404 comprises a pre-coder 1980.
  • the pre-coder 1980 pre-codes or is configured to pre-code data packets in a complex frequency domain, a wavelet domain, or a frequency domain.
  • the transmitter arrangement 404 comprises a first beamforming processing unit 1940.
  • the first beamforming processing unit 1940 converts or is configured to convert the pre-coded data packets from a complex frequency domain, a wavelet domain, or a frequency domain to a time domain.
  • the transmitter arrangement 404 comprises a second beamforming processing unit 1810.
  • the second beamforming processing unit 1810 configured to process the pre-coded data packets in one or more of a spatial domain and a time domain to obtain digital signals.
  • the second beamforming processing unit 1810 comprises a plurality (m) of filters, such as spatio-temporal filters 1800, ..., 1807.
  • the filters e.g., the spatio-temporal filters 1800, ..., 1807, processes or are configured to process the pre-coded data packets in one or more of a spatial domain and a time domain to obtain digital signals.
  • the pre-coder 1980 comprises the first beamforming processing unit 1940. Furthermore, in some embodiments, the pre-coder 1980 comprises the second beamforming processing unit 1810.
  • the multi-antenna transmitter and receiver arrangement 400 comprises a receiver arrangement 402 (shown in figure 6 and described below in connection with figure 6).
  • the multi-antenna transmitter and receiver arrangement 400 comprises a plurality of transceivers 500, 501, ..., 515.
  • the transceivers 500, 501, ..., 515 transmits or are configured to transmit each of the analog signals via a plurality of (respective) antenna units 700, 701, ..., 715 (e.g., during a transmission mode).
  • the transceivers 500, 501, ..., 515 receives or are configured to receive a plurality of analog radio signals via the plurality of (respective) antenna units 700, 701, ..., 715 (e.g., during a reception mode).
  • the computer program When loaded into the data processor, the computer program may be stored in a memory (MEM) 230 associated with or comprised in the data processor. According to some embodiments, the computer program may, when loaded into and run by the data processor, cause execution of method steps according to, for example, the method illustrated in figure 1A, which is described herein. Furthermore, in some embodiments, there is provided a computer program product comprising instructions, which, when executed on at least one processor of a processing device, cause the processing device to carry out the method illustrated in figure 1A.
  • MEM memory
  • control circuitry may be associated with (e.g., operatively connectable, or connected, to) a first obtainment unit (e.g., first obtaining circuitry or a first obtainer). Furthermore, the control circuitry causes or is configured to cause pre-coding 320 of the data packet based on the obtained data packet type. To this end, the control circuitry may be associated with (e.g., operatively connectable, or connected, to) a pre-coding unit (e.g., pre-coding circuitry or the pre-coder 1980). In some embodiments, the control circuitry causes or is configured to cause transmission 330 of the pre-coded data packet.
  • the control circuitry causes or is configured to cause derivation (or obtainment or calculation) 314 of a channel tap filter length from the obtained channel characteristics.
  • the controlling circuitry may be associated with (e.g., operatively connectable, or connected, to) a first derivation unit (e.g., first derivating circuitry or the filter control unit 1920).
  • a first derivation unit e.g., first derivating circuitry or the filter control unit 1920.
  • the control circuitry causes or is configured to cause allocation 323 of a first transmit power associated with a first number of channel taps
  • the control circuitry causes or is configured to cause allocation 325 of a second transmit power associated with a second number of channel taps.
  • control circuitry causes or is configured to cause utilization 326 of a first set of phase shifts, scaling factors and time delays for the data packet to be transmitted
  • control circuitry causes or is configured to cause utilization 328 of a second set of phase shifts, scaling factors and time delays for the data packet to be transmitted.
  • the controlling circuitry may be associated with (e.g., operatively connectable, or connected, to) first and second utilization units (e.g., first and second utilization circuitry or first and second utilizers or the pre-coder 1980).
  • the controlling circuitry may be associated with (e.g., operatively connectable, or connected, to) a first beamforming processing unit 1940 (e.g., first beamforming processing circuitry or a first beamforming processor or the pre-coder 1980).
  • the first beamforming processing unit 1940 may be one or more of an inverse Discrete Fourier Transformer (IDFT), an Inverse Fast Fourier transformer (IFFT), an Inverse Laplace transformer, an Inverse Wavelet transformer and/or an Inverse Z-transformer.
  • the control circuitry causes or is configured to cause performance of second beamforming processing.
  • the control circuitry causes or is configured to cause reception of a plurality of analog radio signals.
  • the controlling circuitry may be associated with (e.g., operatively connectable, or connected, to) a receiver arrangement 402 (e.g., receiving circuitry or a receiver or transceivers 500, 501, ..., 515).
  • the control circuitry causes or is configured to cause conversion of the plurality of analog radio signals into a plurality of digital signals.
  • the controlling circuitry may be associated with (e.g., operatively connectable, or connected, to) a receiver arrangement 402 (e.g., receiving circuitry or a receiver or ADCs 600, 601, ..., 615 seen in figure 6).
  • control circuitry causes or is configured to cause conversion of the (e.g., a third plurality) combined digital signals to a plurality (N) of analog baseband signals.
  • the controlling circuitry may be associated with (e.g., operatively connectable, or connected, to) digital to analog (DA) conversion units (e.g., digital to analog converting circuitry or DA converters 642).
  • DA digital to analog
  • control circuitry causes or is configured to cause up-conversion of each of the plurality (N) of analog baseband signals to a respective carrier frequency radio signal.
  • the controlling circuitry may be associated with (e.g., operatively connectable, or connected, to) up-conversion units (e.g., up-converting circuitry or up-converters 640).
  • the control circuitry causes or is configured to cause transmitting each of the carrier frequency radio signals.
  • the controlling circuitry may be associated with (e.g., operatively connectable, or connected, to) transmission units (e.g., transmitting circuitry or transmitters or transceivers 500, 501, ..., 515 and associated antenna units 700,
  • the characteristics is a (time domain) radio channel characteristics.
  • the characteristics comprises channel estimates, such as radio channel estimates, e.g., for each of the digital signals.
  • the characteristics comprises (radio) channel filter taps indicative of the radio channel characteristics.
  • the receiver arrangement 402 comprises a plurality of spatio-temporal filters 800, ..., 807.
  • the spatio-temporal filters 800, ..., 807 are configured to process or processes the plurality of digital signals to obtain a plurality of combined signals.
  • the receiver arrangement 402 comprises a transform unit 940.
  • the transform unit 940 is configured to transform or transforms each of the plurality of combined signals into a frequency domain.
  • the transform unit 940 is or comprises a plurality of transform sub-units. Each transform sub-unit is configured (connected and otherwise adapted) to process a respective signal of the plurality of combined signals.
  • the transform unit transforms each of the combined signals in a serial manner.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radio Transmission System (AREA)

Abstract

L'invention concerne un procédé (100) pour un agencement d'émetteur et de récepteur à antennes multiples (400), l'agencement d'émetteur et de récepteur à antennes multiples (400) pouvant être inclus dans un dispositif sans fil, WD, ou dans un nœud d'émetteur-récepteur, TNœud, le procédé consistant à : obtenir (110) un type de paquet de données pour un paquet de données à transmettre à un TNœud à distance ; pré-coder (120) le paquet de données à transmettre sur la base du type de paquet de données obtenu. L'invention concerne également un produit programme informatique, un agencement d'émetteur et de récepteur à antennes multiples, un dispositif sans fil et un nœud d'émetteur-récepteur.
PCT/SE2023/050483 2022-06-10 2023-05-17 Procédé de précodage d'un paquet de données pour un agencement d'émetteur et de récepteur à antennes multiples, produit programme informatique, support de stockage lisible par ordinateur non transitoire, agencement d'émetteur et de récepteur à antennes multiples, dispositif sans fil et nœud émetteur-récepteur WO2023239273A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE2230190 2022-06-10
SE2230190-7 2022-06-10

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WO2023239273A1 true WO2023239273A1 (fr) 2023-12-14

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PCT/SE2023/050483 WO2023239273A1 (fr) 2022-06-10 2023-05-17 Procédé de précodage d'un paquet de données pour un agencement d'émetteur et de récepteur à antennes multiples, produit programme informatique, support de stockage lisible par ordinateur non transitoire, agencement d'émetteur et de récepteur à antennes multiples, dispositif sans fil et nœud émetteur-récepteur

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130294369A1 (en) 2012-05-04 2013-11-07 Esmael Hejazi Dinan Control Channel in a Wireless Communication System
US20160066197A1 (en) * 2014-08-28 2016-03-03 Samsung Electronics Co., Ltd. Method and apparatus for setting beam in mobile communication system
EP3304969A1 (fr) 2015-05-29 2018-04-11 Samsung Electronics Co., Ltd. Procédé et appareil d'émission et de réception de données dans un système de communication mobile
EP3557797A1 (fr) * 2017-01-03 2019-10-23 Huawei Technologies Co., Ltd. Procédé de communication, station de base et dispositif terminal

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130294369A1 (en) 2012-05-04 2013-11-07 Esmael Hejazi Dinan Control Channel in a Wireless Communication System
US20160066197A1 (en) * 2014-08-28 2016-03-03 Samsung Electronics Co., Ltd. Method and apparatus for setting beam in mobile communication system
EP3304969A1 (fr) 2015-05-29 2018-04-11 Samsung Electronics Co., Ltd. Procédé et appareil d'émission et de réception de données dans un système de communication mobile
EP3557797A1 (fr) * 2017-01-03 2019-10-23 Huawei Technologies Co., Ltd. Procédé de communication, station de base et dispositif terminal

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