WO2023209078A1 - Architectures d'antenne pour récupération de réciprocité dans des systèmes de duplex intégral - Google Patents

Architectures d'antenne pour récupération de réciprocité dans des systèmes de duplex intégral Download PDF

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Publication number
WO2023209078A1
WO2023209078A1 PCT/EP2023/061093 EP2023061093W WO2023209078A1 WO 2023209078 A1 WO2023209078 A1 WO 2023209078A1 EP 2023061093 W EP2023061093 W EP 2023061093W WO 2023209078 A1 WO2023209078 A1 WO 2023209078A1
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WIPO (PCT)
Prior art keywords
antenna
antenna array
processing circuitry
array
arrangement
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PCT/EP2023/061093
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English (en)
Inventor
Jung-Fu Cheng
Stephen Grant
Abhishek AMBEDE
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Telefonaktiebolaget Lm Ericsson (Publ)
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Publication of WO2023209078A1 publication Critical patent/WO2023209078A1/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
    • H04B7/06—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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/44—Transmit/receive switching
    • 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
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection
    • H04B7/06952—Selecting one or more beams from a plurality of beams, e.g. beam training, management or sweeping
    • H04B7/06956—Selecting one or more beams from a plurality of beams, e.g. beam training, management or sweeping using a selection of antenna panels
    • 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
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0802—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection
    • H04B7/0805—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with single receiver and antenna switching
    • 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
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0802—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection
    • H04B7/0817—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with multiple receivers and antenna path selection

Definitions

  • the present disclosure relates to the field of antenna systems, and in particular to antenna architectures for reciprocity recovery in full duplex systems, such as Sub-Band Full Duplex (SBFD) systems and In-Band Full Duplex (IBFD) systems.
  • SBFD Sub-Band Full Duplex
  • IBFD In-Band Full Duplex
  • New radio (NR) standard in 3GPP is being designed to provide service for multiple use cases such as Enhanced Mobile Broadband (eMBB), Ultra-Reliable and Low Latency Communication (URLLC), and Machine Type Communication (MTC).
  • eMBB Enhanced Mobile Broadband
  • URLLC Ultra-Reliable and Low Latency Communication
  • MTC Machine Type Communication
  • a mini-slot may consist of any number of 1 to 14 Orthogonal Frequency-Division Multiplexing (OFDM) symbols. It should be noted that the concepts of slot and mini-slot are not specific to a specific service meaning that a mini-slot may be used for either eMBB, URLLC, or other services.
  • Fig. 1 schematically illustrates an example of a radio resource in NR.
  • a UE can be configured with up to four carrier bandwidth parts in the downlink with a single downlink carrier bandwidth part being active at a given time.
  • a UE can be configured with up to four carrier bandwidth parts in the uplink with a single uplink carrier bandwidth part being active at a given time.
  • An NR slot consists of several OFDM symbols, according to current agreements either 7 or 14 symbols (OFDM subcarrier spacing ⁇ 60 kHz) and 14 symbols (OFDM subcarrier spacing > 60 kHz).
  • Fig.2 shows a subframe with 14 OFDM symbols.
  • T s and T sym b denote the slot and OFDM symbol duration, respectively.
  • Some embodiments advantageously provide antenna arrangements for reciprocity recovery in full duplex systems, such as Sub-Band Full Duplex (SBFD) systems and In-Band Full Duplex (IBFD) systems.
  • SBFD Sub-Band Full Duplex
  • IBFD In-Band Full Duplex
  • an antenna arrangement comprising a first antenna array comprising a plurality of antenna elements, a second antenna array comprising a plurality of antenna elements, a transmit (TX) processing circuitry connectable to the second antenna array for processing signals to be transmitted from the second antenna array, a first receive (RX) processing circuitry connectable to the first antenna array for processing signals received by the first antenna array, a second RX processing circuitry connectable to the second antenna array for processing signals received by the second antenna array, and wherein the second antenna array is selectively connectable to the TX processing circuitry or to the second RX processing circuitry.
  • TX transmit
  • RX receive
  • an antenna arrangement comprising a first antenna array comprising a plurality of antenna elements, a second antenna array comprising a plurality of antenna elements, a transmit (TX) processing circuitry connectable to the second antenna array for processing signals to be transmitted from the second antenna array, a receive (RX) processing circuitry selectively connectable to the first antenna array or the second antenna array for processing signals received by the first antenna array or by the second antenna array, respectively.
  • TX transmit
  • RX receive
  • an antenna arrangement comprising a first antenna array comprising a plurality of antenna elements, a second antenna array comprising a plurality of antenna elements, a first transmit (TX) processing circuitry for processing signals to be transmitted from the second antenna array, a second TX processing circuitry for processing signals to be transmitted from the second antenna array, a first receive (RX) processing circuitry for processing signals received by the first antenna array, a second RX processing circuitry for processing signals received by the second antenna array, wherein the first antenna array is selectively connectable to the first RX processing circuitry or to the second TX processing circuitry, and wherein the second antenna array is selectively connectable to the first TX processing circuitry or to the second RX processing circuitry.
  • TX transmit
  • RX receive
  • an antenna arrangement comprising a first antenna array comprising a plurality of antenna elements, a second antenna array comprising a plurality of antenna elements, a transmit (TX) processing circuitry for processing signals to be transmitted from the first antenna array or the second antenna array, a receive (RX) processing circuitry for processing signals received by the first antenna array or the second antenna array, wherein the first antenna array is selectively connectable to the RX processing circuitry or to the TX processing circuitry, and wherein the second antenna array is selectively connectable to the TX processing circuitry or to the RX processing circuitry.
  • TX transmit
  • RX receive
  • a network node for communicating with a wireless device in a wireless communication network, wherein the network node comprises the antenna arrangement according to any one of the embodiments disclosed herein.
  • a wireless device for communicating with a network node in a wireless communication network, wherein the wireless device comprises the antenna arrangement according to any one of the embodiments disclosed herein.
  • Fig. 1 is a schematic illustration of an example of a radio resource in NR.
  • Fig. 2 is a schematic illustration of a subframe with 14 OFDM symbols.
  • Fig. 3 is a schematic illustration of a network node and a wireless device in a wireless communications network.
  • Fig. 4 is a schematic illustration of FDD and TDD systems.
  • Fig. 5 is a schematic illustration of an uplink/downlink time/frequency structure for FDD and TDD.
  • Fig. 6 is a schematic illustration of a TDD carrier and a TDD carrier system.
  • Fig. 7 is a schematic illustration of a SBFD carrier and a SBFD carrier system.
  • Fig. 7 is a schematic illustration of an IBFD carrier and an IBFD carrier system.
  • Fig. 9 is a schematic illustration of a TDD antenna array with 32 cross-polarized antenna elements.
  • Fig. 10 is a schematic illustration of an antenna architecture for SBFD and IBFD systems.
  • Fig. 11 is a schematic illustration of an antenna architecture for SBFD and IBFD systems in accordance with some embodiments.
  • Fig. 12 is a schematic illustration of some operating modes of the antenna architecture of Fig. 11 for SBFD and IBFD systems.
  • Fig. 13 is a schematic illustration of an antenna architecture for SBFD and IBFD systems in accordance with some embodiments.
  • Fig. 14 is a schematic illustration of some operating modes of the antenna architecture of Fig. 13 for SBFD and IBFD systems.
  • Fig. 15 is a schematic illustration of an antenna architecture for SBFD and IBFD systems in accordance with some embodiments.
  • Fig. 16 is a schematic illustration of some operating modes of the antenna architecture of Fig. 15 for SBFD and IBFD systems.
  • Fig. 17 is a schematic illustration of some operating modes of the antenna architecture of Fig. 15 for SBFD and IBFD systems.
  • Fig. 18 is a schematic illustration of an antenna architecture for SBFD and IBFD systems in accordance with some embodiments.
  • Fig. 19 is a schematic illustration of some operating modes of the antenna architecture of Fig. 18 for SBFD and IBFD systems.
  • Fig. 20 is a schematic illustration of some operating modes of the antenna architecture of Fig. 18 for SBFD and IBFD systems.
  • Fig. 21 is a schematic illustration of some operating modes of the antenna architecture of Fig. 13 for SBFD and IBFD systems.
  • relational terms such as “first” and “second,” “top” and “bottom,” and the like, may be used solely to distinguish one entity or element from another entity or element without necessarily requiring or implying any physical or logical relationship or order between such entities or elements.
  • the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the concepts described herein.
  • the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise.
  • the joining term, "in communication with” and the like may be used to indicate electrical or data communication, which may be accomplished by physical contact, induction, electromagnetic radiation, radio signaling, infrared signaling or optical signaling, for example.
  • electrical or data communication may be accomplished by physical contact, induction, electromagnetic radiation, radio signaling, infrared signaling or optical signaling, for example.
  • the terms “coupled,” “connected,” and the like may be used herein to indicate a connection, although not necessarily directly, and may include wired and/or wireless connections.
  • network node can be any kind of network node comprised in a radio network which may further comprise any of base station (BS), radio base station, base transceiver station (BTS), base station controller (BSC), radio network controller (RNC), g Node B (gNB), evolved Node B (eNB or eNodeB), Node B, multi-standard radio (MSR) radio node such as MSR BS, multi-cell/multicast coordination entity (MCE), integrated access and backhaul (IAB) node, relay node, integrated access and backhaul (IAB) node, donor node controlling relay, radio access point (AP), transmission points, transmission nodes, Remote Radio Unit (RRU) Remote Radio Head (RRH), a core network node (e.g., mobile management entity (MME), self-organizing network (SON) node, a coordinating node, positioning node, MDT node, etc.), an external node (e.g., 3rd party node, a node
  • MME mobile management entity
  • wireless device or a user equipment (UE) are used interchangeably.
  • the WD herein can be any type of wireless device capable of communicating with a network node or another WD over radio signals, such as wireless device (WD).
  • the WD may also be a radio communication device, target device, device to device (D2D) WD, machine type WD or WD capable of machine to machine communication (M2M), low-cost and/or low-complexity WD, a sensor equipped with WD, Tablet, mobile terminals, smart phone, laptop embedded equipped (LEE), laptop mounted equipment (LME), USB dongles, Customer Premises Equipment (CPE), an Internet of Things (loT) device, or a Narrowband loT (NB-IOT) device, etc.
  • D2D device to device
  • M2M machine to machine communication
  • M2M machine to machine communication
  • Tablet mobile terminals
  • smart phone laptop embedded equipped (LEE), laptop mounted equipment (LME), USB dongles
  • CPE Customer Premises Equipment
  • LME Customer Premises Equipment
  • NB-IOT Narrowband loT
  • WCDMA Wide Band Code Division Multiple Access
  • WiMax Worldwide Interoperability for Microwave Access
  • UMB Ultra Mobile Broadband
  • GSM Global System for Mobile Communications
  • Fig. 3 depicts a wireless communications network 100 in which embodiments herein may operate, i.e. nodes (network nodes, wireless devices) within which the herein disclosed antenna architectures may be implemented.
  • the wireless communications network 100 may be a radio communications network, such as, 5G or NR network.
  • the wireless communications network 100 is exemplified herein as an 5G or NR network, the wireless communications network 100 may also employ technology of any one of LTE, LTE-Advanced, WCDMA, GSM/EDGE, WiMax, UMB, GSM, or any other similar network or system.
  • the wireless communications network 100 may also employ technology of an Ultra Dense Network, UDN, which e.g. may transmit on millimetre-waves (mmW).
  • UDN Ultra Dense Network
  • the wireless communications network 100 comprises a network node 110.
  • the network node 110 may serve wireless devices in at least one cell 115, or coverage area.
  • the network node 110 may correspond to any type of network node or radio network node capable of communicating with a wireless device and/or with another network node, such as, a base station (BS), a radio base station, gNB, eNB, eNodeB, a Home NodeB, a Home eNodeB, a femto Base Station (BS), or a pico BS in the wireless communications network 100.
  • the network node 110 may be a repeater, multi-standard radio (MSR) radio node such as MSR BS, network controller, radio network controller (RNC), base station controller (BSC), relay, donor node controlling relay, base transceiver station (BTS), access point (AP), transmission points, transmission nodes, a Remote Radio Unit (RRU), a Remote Radio Head (RRH), nodes in distributed antenna system (DAS), or core network node.
  • MSR multi-standard radio
  • two wireless devices 121 are located within the cell 115.
  • the wireless devices 121 are configured to communicate within the wireless communications network 100 via the network node 110 over a radio link served by the network node 110. Utilizing the radio link, a bi-directional communications flow may be set up between the wireless devices 121 and any entity capable of communication via the wireless communications network 100.
  • the wireless devices 121 may transmit data over an air or radio interface to the radio base station 110 in uplink, UL, transmissions 131 and the radio base station may transmit data over an air or radio interface to the wireless devices 121 in downlink, DL, transmissions 132.
  • the wireless devices 121 may refer to any type of wireless devices (WDs) or User Equipments (UEs) communicating with a network node and/or with another wireless device in a cellular, mobile or radio communication network or system.
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • transmission and reception from a node can be multiplexed in the frequency domain or in the time domain (or combinations thereof).
  • Frequency Division Duplex as illustrated to the left in Fig. 4 implies that downlink and uplink transmission take place in different, sufficiently separated, frequency bands.
  • Time Division Duplex as illustrated to the right in Fig. 4, implies that downlink and uplink transmission take place in different, non-overlapping time slots.
  • TDD can operate in unpaired spectrum, whereas FDD requires paired spectrum.
  • the structure of the transmitted signal in a communication system is organized in the form of a frame structure.
  • NR uses ten equally-sized slots per radio frame as illustrated in Fig. 5 for the case of 15 kHz subcarrier spacing.
  • FDD frequency division duplex
  • fm uplink transmission
  • f D i_ downlink transmission
  • FDD can be either full duplex or half duplex.
  • a terminal can transmit and receive simultaneously, while in half-duplex operation, the terminal cannot transmit and receive simultaneously (a base station is generally capable of simultaneous reception/transmission though, e.g. receiving from one terminal while simultaneously transmitting to another terminal).
  • a half-duplex terminal may be monitoring/receiving in the downlink except when explicitly being instructed to transmit in a certain subframe.
  • TDD operation (lower part of Fig. 5), there is only a single carrier frequency and uplink and downlink transmissions are always separated in time also on a cell basis.
  • both the base station and the mobile terminals need to switch from transmission to reception and vice versa.
  • An essential aspect of any TDD system is to provide the possibility for a sufficiently large guard time where neither downlink nor uplink transmissions occur. This is required to avoid interference between uplink and downlink transmissions.
  • this guard time may be provided by special subframes, which are split into three parts: symbols for DL, a guard period (GP), and symbols for uplink. The remaining subframes are either allocated to uplink or downlink transmission.
  • a portion of a wide bandwidth carrier may be used for a different direction than that of the rest of the carrier. This is illustrated in the left-hand side of Fig. 7. That is, unlike a conventional TDD system as shown on the left-hand side of Fig. 6 where the entire bandwidth is used for DL transmission in the first three slots, the center portion of the SBFD carrier is used for UL reception while the rest of the carrier continues to be used for DL transmission as shown in the left-hand side of Fig. 7.
  • some carriers in the SBFD system can be used for a different direction than that of the other carriers as shown in the right-hand side of Fig. 7.
  • In-band full duplex Another example of a full duplex system is an in-band full duplex system (IBFD) where the same carrier in a single carrier system or all carriers in a multi-carrier system can be simultaneously used for DL and UL operations. In other words, the same time and frequency resources can be used for both transmission and reception at the same device.
  • IBFD in-band full duplex system
  • a single-carrier IBFD system and a multi-carrier IBFD system are illustrated with DL only slots, mixed DL+UL slots using overlapping frequency resources, and UL only slots.
  • An exemplary antenna array 900 for a TDD system is illustrated in Fig. 9.
  • multiple antenna elements 910 are utilized and typically placed in a planar array with horizontal and vertical spacings suitable for the operating frequency bands.
  • the antenna array is connected to a TX/RX switch 906 such that the same antenna array 900 can be used for transmitting DL signals in a DL slot as well as used for receiving UL signals in an UL slot.
  • the TX/RX switch 906 selectively connects the antenna array to the TX processing chain 903 or to the RX processing chain 904.
  • the RX processing chain 904 may also be referred to as an RX module comprising a set of components or functional blocks, such as e.g. amplifiers (e.g. Low noise amplifiers), Analog-to-Digital converters (ADCs), mixers, filters, etc. as readily understood by the person skilled in the art.
  • the TX processing chain 903 may be referred to as a TX module comprising a set of components or functional blocks, such as e.g. power amplifiers (PAs), Digital-to-Analog converters (DACs), mixers, filters, etc. as readily understood by the person skilled in the art.
  • PAs power amplifiers
  • DACs Digital-to-Analog converters
  • the base station can perform analysis of the UL signal from a UE (e.g., the sounding reference signal (SRS)) and use the detailed channel knowledge gained from such analysis to perform advanced beamforming on the DL signals to transmit to the UE. This is referred to as reciprocity-based beamforming.
  • a UE e.g., the sounding reference signal (SRS)
  • SRS sounding reference signal
  • the base station will need to perform DL transmission and UL reception simultaneously. It hence becomes necessary to utilize two antenna arrays for the two directions, respectively as illustrated by the antenna arrangement 1000 in Figure 10.
  • a first antenna array 1001 is utilized for UL reception only.
  • a second antenna array 1002 is utilized for DL transmission only.
  • the UL receiver can be de-sensitized due to the fact that the DL transmit power is generally much higher than the UL receive power.
  • DL transmission and UL reception are performed by two different antenna arrays. It may therefore not even be possible to perform DL reciprocity-based beamforming using the DL transmission array based on the UL channel knowledge gained from the signal received by the UL reception array.
  • the DL/UL terminology would be interchanged.
  • various antenna architectures 1100, 1300, 1500, 1800 for reciprocity recovery in full duplex systems such as sub-band full duplex (SBFD) systems and in-band full duplex (IBFD) systems.
  • SBFD sub-band full duplex
  • IBFD in-band full duplex
  • the following disclosure is mainly provided from the perspective of a network node (i.e. as if the antenna arrangement/architecture is implemented in a network node).
  • the disclosure henceforth describes the UL signals as signals received by the one (or both) of the antenna arrays of the network node such that advanced DL beamforming can be performed by the network node. It should be clear to one skilled in the art that the teaching and disclosure herein can be applied to other nodes in a wireless communication network.
  • a user equipment may also be referred to as a wireless device (WD) herein
  • WD wireless device
  • reception of DL signals received by one (or both) of the antenna arrays of the UE can be performed using the teaching of the present disclosure such that advanced UL beamforming can be performed by the UE.
  • an antenna arrangement (antenna architecture) 1100 comprising twice the amount of RX processing chains and the same number of TX processing chains (as compared to the antenna architecture 1000 of Fig. 10).
  • An example of such an antenna arrangement 1100 is illustrated in Fig. 11.
  • Fig. 11 is a schematic illustration of an antenna arrangement 1100 for use in SBFD and IBFD systems.
  • the antenna arrangement 1100 may for example be implemented in a wireless device for communicating with a network node in a wireless communication system.
  • antenna arrangement may for example be implemented in a network node (e.g. gNB) for communicating with a wireless device in a wireless communication system.
  • a network node e.g. gNB
  • the antenna arrangement 1100 comprises a first antenna array 1101 comprising a plurality of antenna elements 1110, and a second antenna array 1102 comprising a plurality of antenna elements 1110.
  • each antenna array comprises 32 cross-polarized antenna elements.
  • other antenna element configurations are feasible as readily understood by the skilled person in the art.
  • the antenna arrangement 1100 further comprises a transmit (TX) processing circuitry 1103 connectable to the second antenna array 1102 for processing signals to be transmitted from the second antenna array 1102, a first receive (RX) processing circuitry 1104 connectable to the first antenna array 1101 for processing signals received by the first antenna array 1101, and a second RX processing circuitry 1105 connectable to the second antenna array 1102 for processing signals received by the second antenna array 1102.
  • the RX processing circuitry 1104, 1105 may also be referred to as RX processing chains or as an RX module) may comprise a set of components or functional blocks, such as e.g. amplifiers (e.g. Low noise amplifiers), Analog-to-Digital converters (ADCs), mixers, filters, etc.
  • the TX processing circuitry 1103 may also be referred to as TX processing chains or a TX module
  • PAs power amplifiers
  • DACs Digital-to-Analog converters
  • filters filters
  • the antenna arrangement 1100 is adapted so that the second antenna array 1102 is selectively connectable to the TX processing circuitry 1103 or to the second RX processing circuitry 1105.
  • the first antenna array 1101 is utilized for reception only (UL reception only when implemented in a network node).
  • the second antenna array is connected to a TX/RX switch 1106 such that it can be utilized for transmission UL reception at different times.
  • the number of RX processing chains 1104, 1105 are doubled in comparison to the antenna architecture 1000 illustrated in Fig. 10.
  • the antenna arrangement 1100 further comprises a transmit-receive (TX/RX) switching device 1106 connected to the second antenna array 1102, where the TX/RX switching device 1106 is configured to selectively connect the second antenna array 1102 to the TX processing circuitry 1103 or the second RX processing circuitry 1105.
  • TX/RX switching device 1106 may also be referred to as a TX/RX switch.
  • the antenna arrangement 1100 further comprises control circuitry 1111 configured to operate the antenna arrangement 1100 in a plurality of operating modes, e.g. by controlling the TX/RX switching device 1106 and accordingly the signal paths between the antenna arrays 1101, 1102 and the TX processing circuitry 1103 and the two separate RX processing circuitry 1104, 1105.
  • control circuitry 1111 configured to operate the antenna arrangement 1100 in a plurality of operating modes, e.g. by controlling the TX/RX switching device 1106 and accordingly the signal paths between the antenna arrays 1101, 1102 and the TX processing circuitry 1103 and the two separate RX processing circuitry 1104, 1105.
  • the antenna arrangement 1100 further comprises control circuitry 1111 configured to operate the antenna arrangement 1100 in a first operating mode where the first antenna array 1101 is connected to the first RX processing circuitry 1104 and the second antenna array 1102 is connected to the TX processing circuitry 1103.
  • the control circuitry 1111 is further configured to operate the antenna arrangement 1100 in a second operating mode where the first antenna array 1101 is connected to the first RX processing circuitry 1104 and the second antenna array 1102 is connected to the second RX processing circuitry 1105.
  • the control circuitry may also be referred to as one or more processors
  • the control circuitry 1111 may be implemented using individual hardware circuitry, using software functioning in conjunction with a programmed microprocessor or general purpose computer, using one or more Application Specific Integrated Circuits (ASICs) and/or using one or more Digital Signal Processors (DSPs).
  • ASICs Application Specific Integrated Circuits
  • DSPs Digital Signal Processors
  • control circuitry 1111 is configured to determine at least one parameter for reciprocity-based beamforming for transmission of a signal from the second antenna array 1102, wherein the at least one parameter for reciprocity-based beamforming is determined based on at least one signal received at the second antenna array 1102 when the antenna arrangement 1100 is operated in the second operating mode.
  • the determination of the at least one parameter for reciprocity based beamforming may comprise determining/computing a composite DL channel h km n between the transmitted reference symbol s k and the receive antenna element (m, ri) to use for UL reciprocity based beamforming.
  • the at least one signal received at the second antenna array 1102 may for example be at least one reference signal (RS), such as e.g. at least one sounding reference signal (SRS) or any other suitable UL reference signal.
  • the at least one reference signal is at least one Channel State Information Reference Signal (CSI-RS), or any other suitable DL reference signal.
  • RS reference signal
  • SRS sounding reference signal
  • CSI-RS Channel State Information Reference Signal
  • control circuitry 1111 is configured to transmit at least one signal from the second antenna array 1102 based on the determined at least one parameter for reciprocity-based beamforming.
  • control circuitry 1111 is configured to transmit at least one signal from the second antenna array 1102 based on the determined at least one parameter for reciprocity-based beamforming when the antenna arrangement 1100 is operated in the first operating mode.
  • transmission of one or more signals comprises using the determined/computed composite DL channel hkmn-
  • Fig. 12 schematically depicts some operating modes of the antenna architecture of Fig. 11 for SBFD and IBFD systems.
  • a network node e.g. gNB
  • UL uplink
  • DL downlink
  • the same features and functions may be applied on the UE-side, i.e. when the antenna arrangement 1100 is comprised by a wireless device or UE by appropriately switching the UL and DL referencing.
  • the TX/RX switch for the second antenna array 1102 is set to TX such that DL signals can be transmitted from the second antenna array 1102. This is illustrated in the upper left-hand side of Figure 12. Note that half of the RX processing chains are not in use during these mixed direction slots, i.e. the second RX processing circuitry 1105 is not in use during these mixed direction slots.
  • the TX/RX switch 1106 for the second antenna array 1102 is set to UL such that the UL signals can be received by both antenna arrays 1101, 1102. This is illustrated in the upper right-hand side of Figure 12.
  • the signals received by both antenna arrays can be combined to obtain enhanced array processing gains and better performance. If such UL signals/channels are scheduled/configured in the UL slots, then the full set of RX processing chains 1104, 1105 can be in use during these UL-only symbols or slots.
  • UL signals that are transmitted from the UEs to assist reciprocity-based beamforming such as the sounding reference signal (SRS)
  • SRS sounding reference signal
  • only the received signals from the second antenna array 1102 are to be utilized for channel analysis for reciprocity-based beamforming. This is indicated in Fig. 12 as an input to a separate "Reciprocity Estimation" module 1121.
  • this analysis/computation may be performed by the aforementioned control circuitry 1111 in conjunction with the second RX processing chain 1105.
  • the network configures the UEs to transmit SRS in at least the frequencies (i.e., on the subcarriers) that will be used for DL transmission during mixed direction slots, for e.g., at least the subcarriers corresponding to DL subbands in an SBFD system or all subcarriers in an IBFD system.
  • the channel knowledge gained from analyzing the received UL channel conditions is for the same antenna array that will be used for DL transmission during a mixed direction slot. Therefore, reciprocity-based DL beamforming can be enabled with the antenna architecture/arrangement 1100 for SBFD and IBFD systems.
  • the network may additionally configure the UEs to transmit SRS over frequencies (i.e., on subcarriers) in the UL subband of the UL-only slot in an SBFD system.
  • the gNB can use the received SRS on these subcarriers in addition to the received SRS in the DL subbands for estimating the channel for DL reciprocity based beamforming.
  • the gNB may use the SRS in all subbands for other purposes, e.g., estimation and feedback to the UE of precoding weights for UL codebook based precoding, UL beam management, positioning, etc.
  • the antenna arrangement 1100 enables reciprocity-based DL transmission for SBFD and IBFD systems.
  • the architecture also enables better performance (e.g., enhanced data rates and/or enhanced coverage) for signals received in UL only slots due to combining of UL signals from two antenna arrays.
  • Such full benefits are made possible by doubling the number of RX processing chains since there are double the number of received signals from both panels.
  • the additional RX processing chains (compared to antenna architecture of Fig. 10) are used only for UL-only slots or symbols. That is, the utilization of the additional hardware may be quite low depending on how often such UL-only symbols or slots are configured in the SBFD or IBFD system.
  • an antenna arrangement (antenna architecture) 1300 comprising the same number of TX and RX processing chains (as compared to the antenna architecture of Fig. 10) but potential restriction on SRS scheduling.
  • An example of such an antenna arrangement 1300 is illustrated in Fig. 13.
  • Fig. 13 is a schematic illustration of an antenna arrangement 1300 for use in SBFD and IBFD systems.
  • the antenna arrangement 1300 may for example be implemented in a wireless device for communicating with a network node in a wireless communication system.
  • the antenna arrangement 1300 may for example be implemented in a network node (e.g. gNB) for communicating with a wireless device in a wireless communication system.
  • each antenna array comprises 32 cross-polarized antenna elements 1310.
  • other antenna element configurations are feasible as readily understood by the skilled person in the art.
  • the antenna arrangement 1300 comprises a first antenna array 1301 comprising a plurality of antenna elements 1310, and a second antenna array 1302 comprising a plurality of antenna elements 1310.
  • the antenna arrangement 1300 further comprises a transmit (TX) processing circuitry 1303 connectable to the second antenna array 1302 for processing signals to be transmitted from the second antenna array 1302, and a receive (RX) processing circuitry 1304 selectively connectable to the first antenna array 1301 or the second antenna array 1302 for processing signals received by the first antenna array 1301 or by the second antenna array 1302, respectively.
  • the RX processing circuitry may also be referred to as RX processing chains or as an RX module
  • 1304 may comprise a set of components or functional blocks, such as e.g.
  • the TX processing circuitry may also be referred to as TX processing chains or a TX module 1303 may comprise a set of components or functional blocks, such as e.g. power amplifiers (PAs), Digital-to-Analog converters (DACs), mixers, filters, etc. as readily understood by the person skilled in the art.
  • PAs power amplifiers
  • DACs Digital-to-Analog converters
  • mixers filters, etc. as readily understood by the person skilled in the art.
  • the antenna arrangement 1300 further comprises a transmit-receive (TX/RX) switching device 1306 connected to the second antenna array 1302, and where the TX/RX switching device 1306 is configured to selectively connect the second antenna array 1302 to the TX processing circuitry 1303 or the RX processing circuitry 1304.
  • TX/RX switching device 1306 may also be referred to as a TX/RX switch 1306.
  • the antenna arrangement 1300 further comprises an array switching device 1307 connected to the RX processing circuitry 1304, where the array switching device 1307 is configured to selectively connect the RX processing circuitry 1304 to the first antenna array 1301 or the second antenna array 1302.
  • the array switching device 1307 may also be referred to as an array switch 1307.
  • the antenna arrangement 1300 further comprises control circuitry 1311 configured to operate the antenna arrangement 1300 in a plurality of operating modes, e.g. by controlling the TX/RX switching device 1306 and the array switching device 1307 and accordingly the signal paths between the antenna arrays 1301, 1302 and the TX processing circuitry 1303 and the RX processing circuitry 1304.
  • control circuitry 1311 configured to operate the antenna arrangement 1300 in a plurality of operating modes, e.g. by controlling the TX/RX switching device 1306 and the array switching device 1307 and accordingly the signal paths between the antenna arrays 1301, 1302 and the TX processing circuitry 1303 and the RX processing circuitry 1304.
  • the antenna arrangement 1300 further comprises control circuitry 1311 configured to operate the antenna arrangement 1300 in a first operating mode where the first antenna array 1301 is connected to the RX processing circuitry 1304 and the second antenna array 1302 is connected to the TX processing circuitry 1303, and operate the antenna arrangement 1300 in a second operating mode where the second antenna array 1302 is connected to the RX processing circuitry 1304.
  • the control circuitry may also be referred to as one or more processors 1311 may be implemented in the TX processing chains 1303 and the RX processing chains 1304, or as a separate unit/module connected to the TX processing chains, the RX processing chains and the TX/RX switch.
  • the control circuitry 1311 may be implemented using individual hardware circuitry, using software functioning in conjunction with a programmed microprocessor or general purpose computer, using one or more Application Specific Integrated Circuits (ASICs) and/or using one or more Digital Signal Processors (DSPs).
  • ASICs Application Specific Integrated Circuits
  • DSPs Digital Signal Processors
  • control circuitry 1311 is configured to determine at least one parameter for reciprocity-based beamforming for transmission of a signal from the second antenna array 1302, wherein the at least one parameter for reciprocity-based beamforming is determined based on at least one signal received at the second antenna array 1302 when the antenna arrangement 1300 is operated in the second operating mode.
  • the determination of the at least one parameter for reciprocity based beamforming may comprise determining/computing a composite DL channel h km n between the transmitted reference symbol s k and the receive antenna element (m, ri) to use for UL reciprocity based beamforming.
  • the at least one signal received at the second antenna array 1302 may for example be at least one reference signal (RS), such as e.g. at least one sounding reference signal (SRS) or any other suitable UL reference signal.
  • the at least one reference signal is at least one Channel State Information Reference Signal (CSI-RS), or any other suitable DL reference signal.
  • RS reference signal
  • SRS sounding reference signal
  • CSI-RS Channel State Information Reference Signal
  • control circuitry 1311 is configured to transmit at least one signal from the second antenna array 1302 based on the determined at least one parameter for reciprocity-based beamforming.
  • control circuitry 1311 is configured to transmit at least one signal from the second antenna array 1302 based on the determined at least one parameter for reciprocity-based beamforming when the antenna arrangement 1300 is operated in the first operating mode.
  • transmission of one or more signals comprises using the determined/computed composite DL channel hkmn-
  • An advantage of some embodiments of the antenna architecture/arrangement 1300 illustrated in Fig. 13 is that the RX processing hardware complexity is reduced as compared with the antenna architecture 1100 illustrated in Fig. 11.
  • the first antenna array 1301 of the antenna arrangement 1300 is utilized for UL reception only.
  • the second antenna array 1302 is connected to a TX/RX switch 1306 such that it can be utilized for DL transmission or UL reception at different times.
  • An array switch 1307 is introduced before the RX processing chains 1304 (between the first antenna array and the RX processing circuitry) such that the RX processing chain 1304 can accept signals received from the first or the second arrays.
  • the number of RX processing chains 1304 remains the same for the antenna architecture illustrated in Fig. 10 since the received UL signals come from only one array at a time.
  • Fig. 14 schematically depicts some operating modes of the antenna architecture of Fig. 13 for SBFD and IBFD systems.
  • a network node e.g. gNB
  • UL uplink
  • DL downlink
  • the same features and functions may be applied on the UE-side, i.e. when the antenna arrangement 1300 is comprised by a wireless device or UE by appropriately switching the UL and DL referencing.
  • the TX/RX switch 1306 for the second antenna array 1302 is set to TX such that DL signals can be transmitted from the second antenna array 1302.
  • the array switch 1307 for the RX processing chain 1304 is set to the first array 1301 such that UL reception can be performed simultaneously with DL transmission. This is illustrated in the upper lefthand side of Figure 14.
  • two operating modes can be selected.
  • the TX/RX switch 1306 for the second array 1302 is set to RX such that the UL signals can be received by the second antenna array 1302.
  • the array switch 1307 preceding the RX processing chains 1304 is set to the second array 1302. This is illustrated in the upper right-hand side of Figure 14.
  • the network configures the UEs to transmit SRS in at least the frequencies (i.e., on the subcarriers) that will be used for DL transmission during mixed direction slots - for e.g., at least the subcarriers corresponding to DL subbands in an SBFD system or all subcarriers in an IBFD system.
  • the channel knowledge gained from analyzing the received UL channel conditions is for the same antenna array that will be used for DL transmission during a mixed direction slot. Therefore, reciprocity-based DL beamforming can be enabled with this antenna arrangement 1300 for SBFD and IBFD systems.
  • the array switch 1307 preceding the RX processing chains is set to the first array 1301. This is illustrated in the lower right-hand side of Figure 14.
  • the same antenna array for receiving UL signals can be used for both mixed direction slots as well as UL only slots.
  • consistent UL channel conditions and UL reception beamforming can be maintained.
  • the antenna arrangement of Fig. 13 reduces RX processing hardware complexity for foregoing the possibility of enhanced UL performance during UL- only symbols or slots. Furthermore, the network may need to schedule SRS in different UL-only symbols or slots than those for other UL signals.
  • antenna architectures/arrangements discussed in the foregoing with respect to Figs. 11 and 13 contain elements/components to facilitate reciprocity recovery, i.e., the TX/RX switch (both architectures/arrangements) and an array switch (the antenna arrangement of Fig. 13), it should be appreciated by those skilled in the art that other architectures that include at least these elements in various setups can also be envisioned.
  • an antenna arrangement (antenna architecture) 1500 comprising twice the amount of RX processing chains and twice the amount of TX processing chains (as compared to the antenna architecture of Fig. 10).
  • An example of such an antenna arrangement 1500 is illustrated in Fig. 15.
  • Fig. 15 is a schematic illustration of an antenna arrangement 1500 for use in SBFD and IBFD systems.
  • the antenna arrangement 1500 may for example be implemented in a wireless device for communicating with a network node in a wireless communication system.
  • the antenna arrangement 1500 may for example be implemented in a network node (e.g. gNB) for communicating with a wireless device in a wireless communication system.
  • each antenna array comprises 32 cross-polarized antenna elements 1510.
  • the antenna arrangement 1500 comprises a first antenna array 1501 comprising a plurality of antenna elements 1510, and a second antenna array 1502 comprising a plurality of antenna elements 1510.
  • the antenna arrangement 1500 further comprises a first transmit (TX) processing circuitry 1503 for processing signals to be transmitted from the second antenna array 1502, and a second TX processing circuitry 1509 for processing signals to be transmitted from the first antenna array 1501.
  • TX transmit
  • the antenna arrangement comprises a first receive (RX) processing circuitry 1504 for processing signals received by the first antenna array 1501, and a second RX processing circuitry 1505 for processing signals received by the second antenna array 1502.
  • the first antenna array 1501 is selectively connectable to the first RX processing circuitry 1504 or to the second TX processing circuitry 1509
  • the second antenna array 1502 is selectively connectable to the first TX processing circuitry 1503 or to the second RX processing circuitry 1505.
  • the RX processing circuitry may also be referred to as RX processing chains or as an RX module
  • RX processing chains may comprise a set of components or functional blocks, such as e.g. amplifiers (e.g. Low noise amplifiers), Analog-to-Digital converters (ADCs), mixers, filters, etc. as readily understood by the person skilled in the art.
  • the TX processing circuitry may also be referred to as TX processing chains or a TX module
  • 1509 may comprise a set of components or functional blocks, such as e.g. power amplifiers (PAs), Digital-to-Analog converters (DACs), mixers, filters, etc. as readily understood by the person skilled in the art.
  • PAs power amplifiers
  • DACs Digital-to-Analog converters
  • the antenna arrangement 1500 comprises a first transmit-receive (TX/RX) switching device 1506 connected to the second antenna array 1502, and a second transmitreceive (TX/RX) switching device 1508 connected to the first antenna array 1501.
  • TX/RX switching device 1506 is configured to selectively connect the second antenna array 1502 to the first TX processing circuitry 1503 or the second RX processing circuitry 1505
  • the second TX/RX switching device 1508 is configured to selectively connect the first antenna array 1501 to the second TX processing circuitry 1509 or the first RX processing circuitry 1504.
  • the TX/RX switching devices may also be referred to as a TX/RX switches.
  • the antenna arrangement 1500 further comprises control circuitry 1511 configured to operate the antenna arrangement 1500 in a plurality of operating modes, e.g. by controlling the TX/RX switching devices 1506, 1508 and accordingly the signal paths between the antenna arrays 1501, 1502 and the two TX processing circuitry 1503, 1509 and the two RX processing circuitry 1504, 1505.
  • control circuitry 1511 configured to operate the antenna arrangement 1500 in a plurality of operating modes, e.g. by controlling the TX/RX switching devices 1506, 1508 and accordingly the signal paths between the antenna arrays 1501, 1502 and the two TX processing circuitry 1503, 1509 and the two RX processing circuitry 1504, 1505.
  • control circuitry 1511 is configured to operate the antenna arrangement 1500 in a first operating mode where the first antenna array 1501 is connected to the second TX processing circuitry 1509 and the second antenna array 1502 is connected to the first TX processing circuitry 1500, and to operate the antenna arrangement 1500 in a second operating mode where the first antenna array 1501 is connected to the first RX processing circuitry 1504 and the second antenna array 1502 is connected to the first TX processing circuitry 1503.
  • the control circuitry 1511 is further configured to operate the antenna arrangement 1500 in a third operating mode where the first antenna array 1501 is connected to the second TX processing circuitry 1509 and the second antenna array 1502 is connected to the second RX processing circuitry 1505, and to operate the antenna arrangement 1500 in a fourth operating mode where the first antenna array 1501 is connected to the first RX processing circuitry 1504 and the second antenna array 1502 is connected to the second RX processing circuitry 1505.
  • the control circuitry (may also be referred to as one or more processors) 1511 may be implemented in the TX processing chains 1503, 1509 and the RX processing chains 1504, 1505, or as a separate unit/module connected to the TX processing chains 1503, 1509, the RX processing chains 1504, 1505 and the TX/RX switches 1506, 1508.
  • the control circuitry 1511 may be implemented using individual hardware circuitry, using software functioning in conjunction with a programmed microprocessor or general purpose computer, using one or more Application Specific Integrated Circuits (ASICs) and/or using one or more Digital Signal Processors (DSPs).
  • ASICs Application Specific Integrated Circuits
  • DSPs Digital Signal Processors
  • control circuitry 1511 is configured to determine at least one parameter for reciprocity-based beamforming for transmission of a signal from the second antenna array 1502, wherein the at least one parameter for reciprocity-based beamforming is determined based on at least one signal received at the second antenna array 1502 when the antenna arrangement 1500 is operated in the third operating mode or the fourth operating mode.
  • the determination of the at least one parameter for reciprocity based beamforming may comprise determining/computing a composite DL channel h km n between the transmitted reference symbol s k and the receive antenna element (m, ri) to use for UL reciprocity based beamforming.
  • m denotes the row index
  • n denotes the column index or vice versa.
  • the at least one signal received at the second antenna array 1502 may for example be at least one reference signal (RS), such as e.g. at least one sounding reference signal (SRS) or any other suitable UL reference signal.
  • the at least one reference signal is at least one Channel State Information Reference Signal (CSI-RS), or any other suitable DL reference signal.
  • the control circuitry 1511 is configured to transmit at least one signal from the second antenna array 1502 based on the determined at least one parameter for reciprocity-based beamforming.
  • transmission of one or more signals comprises using the determined/computed composite DL channel hkmn-
  • control circuitry 1511 is configured to transmit at least one signal from the second antenna array 1502 based on the determined at least one parameter for reciprocity-based beamforming when the antenna arrangement 1500 is operated in the first operating mode or in the second operating mode.
  • control circuitry 1511 is configured to determine at least one parameter for reciprocity-based beamforming for transmission of a signal from the first antenna array 1501, wherein the at least one parameter for reciprocity-based beamforming is determined based on at least one signal received at the first antenna array 1501 when the antenna arrangement 1500 is operated in the second operating mode or the fourth operating mode.
  • the determination of the at least one parameter for reciprocity based beamforming may comprise determining/computing a composite DL channel hkmn between the transmitted reference symbol s k and the receive antenna element (m, ri) to use for UL reciprocity based beamforming.
  • the at least one signal received at the first antenna array 1501 may for example be at least one reference signal (RS), such as e.g. at least one sounding reference signal (SRS) or any other suitable UL reference signal.
  • the at least one reference signal is at least one Channel State Information Reference Signal (CSI-RS), or any other suitable DL reference signal.
  • RS reference signal
  • SRS sounding reference signal
  • CSI-RS Channel State Information Reference Signal
  • control circuitry 1511 is configured to transmit at least one signal from the first antenna array 1501 based on the determined at least one parameter for reciprocity-based beamforming.
  • control circuitry 1511 is configured to transmit at least one signal from the first antenna array 1501 based on the determined at least one parameter for reciprocity-based beamforming when the antenna arrangement 1500 is operated in the first operating mode or in the third operating mode.
  • transmission of one or more signals comprises using the determined/computed composite DL channel hkmn-
  • an antenna architecture 1500 illustrated in Fig. 15 is similar to the antenna architecture 1100 illustrated in Fig. 11, but it contains a second TX/RX switch 1508 connected to the first antenna array 1501.
  • the second TX/RX switch 1508 is connected to a second set of TX processing chains 1509 and the second switch 1508 allows those TX processing chains 1509 to be used in symbols or slots which are used for DL-only.
  • both antenna arrays 1501, 1502 can be used for DL transmission to gain DL performance advantage, albeit at the cost of additional TX processing chains 1503, 1509.
  • references to uplink (UL) and downlink (DL) transmissions are from the network-perspective, i.e. when the antenna arrangement 1500 is implemented in or comprised by a network node (e.g. gNB).
  • a network node e.g. gNB
  • the same features and functions may be applied on the UE-side, i.e. when the antenna arrangement 1500 is implemented in or comprised by a wireless device or UE by appropriately switching the UL and DL referencing.
  • Fig. 15 for SBFD and IBFD systems are further illustrated in Fig. 16 and Fig. 17, wherein the latter illustrates usage that allows for obtaining more frequent channel knowledge. It is to be noted that when compared with antenna architecture 1100 illustrated in Fig. 11, this is a unique benefit offered by the antenna arrangement 1500 depicted in Fig. 15 since it enables both antenna arrays to be used for TX and RX.
  • an antenna arrangement (antenna architecture) 1800 comprising the same number of TX and RX processing chains (as compared to the antenna architecture of Fig. 10) but potential restriction on SRS scheduling.
  • An example of such an antenna arrangement 1800 is illustrated in Fig. 18.
  • Fig. 18 is a schematic illustration of an antenna arrangement 1800 for use in SBFD and IBFD systems.
  • the antenna arrangement 1800 may for example be implemented in a wireless device for communicating with a network node in a wireless communication system.
  • the antenna arrangement 1800 may for example be implemented in a network node (e.g. gNB) for communicating with a wireless device in a wireless communication system.
  • a network node e.g. gNB
  • each antenna array comprises 32 cross-polarized antenna elements 1810.
  • other antenna element configurations are feasible as readily understood by the skilled person in the art.
  • the antenna arrangement 1800 comprises a first antenna array 1801 comprising a plurality of antenna elements 1810, and a second antenna array 1802 comprising a plurality of antenna elements 1810.
  • the antenna arrangement 1800 also comprises a transmit (TX) processing circuitry 1803 for processing signals to be transmitted from the first antenna array 1801 or the second antenna array 1802, and a receive (RX) processing circuitry 1804 for processing signals received by the first antenna array 1801 or the second antenna array 1802.
  • the first antenna array 1801 is selectively connectable to the RX processing circuitry 1804 or to the TX processing circuitry 1803, and the second antenna array 1802 is selectively connectable to the TX processing circuitry 1803 or to the RX processing circuitry 1804.
  • the RX processing circuitry may also be referred to as RX processing chains or as an RX module
  • RX processing chains or as an RX module may comprise a set of components or functional blocks, such as e.g. amplifiers (e.g. Low noise amplifiers), Analog-to-Digital converters (ADCs), mixers, filters, etc. as readily understood by the person skilled in the art.
  • the TX processing circuitry may also be referred to as TX processing chains or a TX module
  • the TX processing circuitry may comprise a set of components or functional blocks, such as e.g. power amplifiers (PAs), Digital-to-Analog converters (DACs), mixers, filters, etc. as readily understood by the person skilled in the art.
  • PAs power amplifiers
  • DACs Digital-to-Analog converters
  • the antenna arrangement 1800 further comprises a first transmit-receive (TX/RX) switching device 1806 connected to the second antenna array 1802, and a first array switching device 1807 connected to the TX processing circuitry 1803.
  • the antenna arrangement 1800 may further comprise a second transmit-receive (TX/RX) switching device 1808 connected to the first antenna array
  • each array switching device 1807, 1809 is connected to both of the first TX/RX switching device 1806 and the second TX/RX switching device 1808 and configured to selectively connect the first antenna array 1801 to the RX processing circuitry 1804 or to the TX processing circuitry 1803 and to selectively connect the second antenna array 1802 to the RX processing circuitry 1804 or to the TX processing circuitry 1803.
  • the order of the TX/RX switches 1806, 1808 and the corresponding array switches 1807, 1809 may be interchanged in accordance with some embodiments. That is, the array switches 1807, 1809 may be connected/arranged/provided between the TX/RX switches 1806, 1808 and the antenna arrays 1801,
  • the antenna arrangement 1800 further comprises control circuitry 1811 configured to operate the antenna arrangement 1800 in a plurality of operating modes, e.g. by controlling the TX/RX switching devices 1806, 1808 and the array switching devices 1807, 1809, and accordingly the signal paths between the two antenna arrays 1801, 1802 and the TX processing circuitry 1803 and the RX processing circuitry 1804.
  • control circuitry 1811 configured to operate the antenna arrangement 1800 in a plurality of operating modes, e.g. by controlling the TX/RX switching devices 1806, 1808 and the array switching devices 1807, 1809, and accordingly the signal paths between the two antenna arrays 1801, 1802 and the TX processing circuitry 1803 and the RX processing circuitry 1804.
  • the control circuitry (may also be referred to as one or more processors) 1811 may be implemented in the TX processing chain 1803 and the RX processing chain 1804, or as a separate unit/module connected to the TX processing chain 1803, the RX processing chain 1804, the array switches 1807, 1809, and the TX/RX switches 1806, 1808.
  • the control circuitry 1811 may be implemented using individual hardware circuitry, using software functioning in conjunction with a programmed microprocessor or general purpose computer, using one or more Application Specific Integrated Circuits (ASICs) and/or using one or more Digital Signal Processors (DSPs).
  • ASICs Application Specific Integrated Circuits
  • DSPs Digital Signal Processors
  • the antenna arrangement 1500 comprises control circuitry 1811 configured to operate the antenna arrangement 1800 in a first operating mode where the TX processing circuitry 1803 is connected to either one of the first antenna array 1801 and the second antenna array 1802 so that the antenna arrangement 1800 is configured to only transmit signals while in the first operating mode.
  • This first operating mode of the antenna arrangement 1800 may be denoted as a simplex transmitting mode.
  • the control circuitry may be further configured to operate the antenna arrangement 1800 in a second operating mode where the RX processing circuitry 1804 is connected to the first antenna array 1801 and the TX processing circuitry 1803 is connected to the second antenna array 1802.
  • This second operating mode of the antenna arrangement 1800 may be denoted as a full duplex mode.
  • the control circuitry 1811 may be further configured to operate the antenna arrangement 1800 in a third operating mode where the RX processing circuitry 1804 is connected to the second antenna array 1802 and the TX processing circuitry 1803 is connected to the first antenna array 1801.
  • This third operating mode of the antenna arrangement 1800 may be denoted as a full duplex mode.
  • the control circuitry 1811 may be further configured to operate the antenna arrangement 1800 in a fourth operating mode where the RX processing circuitry 1803 is connected to either one of the first antenna array 1801 and the second antenna array 1802 so that the antenna arrangement 1800 is configured to only receive signals while in the fourth operating mode.
  • This fourth operating mode of the antenna arrangement 1800 may be denoted as a simplex receiving mode.
  • control circuitry 1811 is configured to determine at least one parameter for reciprocity-based beamforming for transmission of a signal from the first antenna array 1801, wherein the at least one parameter for reciprocity-based beamforming is determined based on at least one signal received at the first antenna array 1801 when the antenna arrangement is operated in the second operating mode or the fourth operating mode (when the RX processing circuitry 1804 is connected to the first array 1801).
  • the determination of the at least one parameter for reciprocity based beamforming may comprise determining/computing a composite DL channel h ⁇ mn between the transmitted reference symbol s k and the receive antenna element (m, ri) to use for UL reciprocity based beamforming.
  • m denotes the row index
  • n denotes the column index or vice versa.
  • control circuitry is configured to determine at least one parameter for reciprocity-based beamforming for transmission of a signal from the second antenna array 1802, wherein the at least one parameter for reciprocity-based beamforming is determined based on at least one signal received at the second antenna array 1802 when the antenna arrangement is operated in the third operating mode or the fourth operating mode (when the RX processing circuitry 1804 is connected to the second array 1802).
  • the determination of the at least one parameter for reciprocity based beamforming may comprise determining/computing a composite DL channel h kmn between the transmitted reference symbol s k and the receive antenna element (m, ri) to use for UL reciprocity based beamforming.
  • m denotes the row index
  • n denotes the column index or vice versa.
  • the at least one signal received at the first antenna array 1801 or second antenna array 1802 may for example be at least one reference signal (RS), such as e.g. at least one sounding reference signal (SRS) or any other suitable UL reference signal.
  • the at least one reference signal is at least one Channel State Information Reference Signal (CSI-RS), or any other suitable DL reference signal.
  • RS reference signal
  • SRS sounding reference signal
  • CSI-RS Channel State Information Reference Signal
  • control circuitry is configure to transmit at least one signal from the first antenna array 1801 or second antenna array 1802 based on the determined at least one parameter for reciprocity-based beamforming for the respective antenna array.
  • transmission of one or more signals comprises using the determined/computed composite DL channel h kmn .
  • the signal may be transmitted when the antenna arrangement 1800 is operated in the first, second or third operating mode depending on the operating mode when the received signal that formed the basis for the determination of the at least one parameter for reciprocity based beamforming was received, i.e. depending on which of the two antenna arrays 1801, 1802 was used to receive the (reference) signal.
  • Fig. 18 depicts an example embodiment of an antenna arrangement 1800 that is similar to the antenna architecture 1300 depicted in Fig. 13.
  • the antenna arrangement 1800 comprises one TX/RX switch and one array switch for each antenna array. Similar to the antenna architecture 1500 of Fig. 15, this architecture 1800 also allows each antenna array to be used either for TX or RX at a given time instant. However, unlike the antenna architecture 1500 of Fig. 15, this architecture 1800 does not require an additional set of TX or RX processing chains. Additionally, when compared with Antenna architecture 1300 depicted in Fig. 13, the antenna architecture 1800 enables usage that allows to obtain more frequent channel knowledge since it enables both antenna arrays to be used for TX and RX. This is a benefit that is similar to the one offered by antenna architecture 1500 of Fig. 15.
  • the operations or operating modes of the antenna arrangement 1800 for SBFD and IBFD systems are further illustrated in Fig. 19 and Fig. 20, wherein the latter illustrates usage that allows for obtaining more frequent channel knowledge.
  • the operations or operational modes of the architecture 1300 depicted in Fig. 13 for SBFD and IBFD systems that does not allow for obtaining similarly more frequent channel knowledge is further illustrated in Fig. 21.
  • an antenna arrangement comprising one antenna array having a plurality of antenna elements.
  • the antenna array comprises a set of sub-arrays, each comprising a subset of antenna elements of the plurality of antenna elements (e.g. column-wise or row-wise groups of antenna elements).
  • the antenna arrangement comprises a set of TX/RX switches, where one TX/RX switch is connected to each sub-array of the set of sub-arrays.
  • the antenna arrangement comprises a set of TX processing chains and a set of RX processing chains, where each TX processing chain and RX processing chain forms a pair that is connected to one TX/RX switch of the set of TX/RX switches. Accordingly, there is one TX processing chains and one RX processing chain for each sub-array.
  • Such an antenna arrangement may for example be implemented in low power SBFD devices, such as e.g. for Wi-Fi applications.
  • a computer-accessible medium may include any tangible or non-transitory storage media or memory media such as electronic, magnetic, or optical media— e.g., disk or CD/DVD-ROM coupled to computer system via bus.
  • tangible and non-transitory are intended to describe a computer-readable storage medium (or “memory”) excluding propagating electromagnetic signals, but are not intended to otherwise limit the type of physical computer-readable storage device that is encompassed by the phrase computer-readable medium or memory.
  • the terms “non-transitory computer-readable medium” or “tangible memory” are intended to encompass types of storage devices that do not necessarily store information permanently, including for example, random access memory (RAM).
  • Program instructions and data stored on a tangible computer- accessible storage medium in non-transitory form may further be transmitted by transmission media or signals such as electrical, electromagnetic, or digital signals, which may be conveyed via a communication medium such as a network and/or a wireless link.
  • transmission media or signals such as electrical, electromagnetic, or digital signals, which may be conveyed via a communication medium such as a network and/or a wireless link.
  • An antenna arrangement comprising: a first antenna array comprising a plurality of antenna elements; a second antenna array comprising a plurality of antenna elements; a transmit (TX) processing circuitry connectable to the second antenna array for processing signals to be transmitted from the second antenna array; a first receive (RX) processing circuitry connectable to the first antenna array for processing signals received by the first antenna array; a second RX processing circuitry connectable to the second antenna array for processing signals received by the second antenna array; wherein the second antenna array is selectively connectable to the TX processing circuitry or to the second RX processing circuitry.
  • A2 The antenna arrangement of clause Al, further comprising: a transmit-receive (TX/RX) switching device connected to the second antenna array; wherein the TX/RX switching device is configured to selectively connect the second antenna array to the TX processing circuitry or the second RX processing circuitry.
  • TX/RX transmit-receive
  • control circuitry configured to: operate the antenna arrangement in a first operating mode where the first antenna array is connected to the first RX processing circuitry and the second antenna array is connected to the TX processing circuitry; and operate the antenna arrangement in a second operating mode where the first antenna array is connected to the first RX processing circuitry and the second antenna array is connected to the second RX processing circuitry.
  • control circuitry is configured to: determine at least one parameter for reciprocity-based beamforming for transmission of a signal from the second antenna array, wherein the at least one parameter for reciprocity-based beamforming is determined based on at least one signal received at the second antenna array when the antenna arrangement is operated in the second operating mode.
  • A6 The antenna arrangement of clause A4, wherein the at least one signal received at the second antenna array is at least one sounding reference signal (SRS) or at least one Channel State Information Reference Signal (CSI-RS).
  • SRS sounding reference signal
  • CSI-RS Channel State Information Reference Signal
  • control circuitry is configured to: transmit at least one signal from the second antenna array based on the determined at least one parameter for reciprocity-based beamforming.
  • control circuitry is configured to: transmit at least one signal from the second antenna array based on the determined at least one parameter for reciprocity-based beamforming when the antenna arrangement is operated in the first operating mode.
  • a network node for communicating with a wireless device in a wireless communication network wherein the network node comprises the antenna arrangement according to any of clauses A1-A8.
  • a wireless device for communicating with a network node in a wireless communication network wherein the wireless device comprises the antenna arrangement according to any of clauses A1-A8.
  • An antenna arrangement comprising: a first antenna array comprising a plurality of antenna elements; a second antenna array comprising a plurality of antenna elements; a transmit (TX) processing circuitry connectable to the second antenna array for processing signals to be transmitted from the second antenna array; a receive (RX) processing circuitry selectively connectable to the first antenna array or the second antenna array for processing signals received by the first antenna array or by the second antenna array, respectively.
  • TX transmit
  • RX receive
  • the antenna arrangement of clause Bl further comprising: a transmit-receive (TX/RX) switching device connected to the second antenna array; wherein the TX/RX switching device is configured to selectively connect the second antenna array to the TX processing circuitry or the RX processing circuitry.
  • TX/RX transmit-receive
  • control circuitry configured to: operate the antenna arrangement in a first operating mode where the first antenna array is connected to the RX processing circuitry and the second antenna array is connected to the TX processing circuitry; and operate the antenna arrangement in a second operating mode where the second antenna array is connected to the RX processing circuitry.
  • control circuitry is configured to: determine at least one parameter for reciprocity-based beamforming for transmission of a signal from the second antenna array, wherein the at least one parameter for reciprocity-based beamforming is determined based on at least one signal received at the second antenna array when the antenna arrangement is operated in the second operating mode.
  • control circuitry is configured to: transmit at least one signal from the second antenna array based on the determined at least one parameter for reciprocity-based beamforming when the antenna arrangement is operated in the first operating mode.
  • BIO A network node for communicating with a wireless device in a wireless communication network, wherein the network node comprises the antenna arrangement according to any of clauses BIBO
  • a wireless device for communicating with a network node in a wireless communication network wherein the wireless device comprises the antenna arrangement according to any of clauses B1-B9.
  • An antenna arrangement comprising: a first antenna array comprising a plurality of antenna elements; a second antenna array comprising a plurality of antenna elements; a first transmit (TX) processing circuitry for processing signals to be transmitted from the second antenna array; a second TX processing circuitry for processing signals to be transmitted from the second antenna array; a first receive (RX) processing circuitry for processing signals received by the first antenna array; a second RX processing circuitry for processing signals received by the second antenna array; wherein the first antenna array is selectively connectable to the first RX processing circuitry or to the second TX processing circuitry; and wherein the second antenna array is selectively connectable to the first TX processing circuitry or to the second RX processing circuitry.
  • the antenna arrangement of clause Cl further comprising: a first transmit-receive (TX/RX) switching device connected to the second antenna array; wherein the first TX/RX switching device is configured to selectively connect the second antenna array to the first TX processing circuitry or the second RX processing circuitry.
  • a second transmit-receive (TX/RX) switching device connected to the first antenna array; wherein the second TX/RX switching device is configured to selectively connect the first antenna array to the second TX processing circuitry or the first RX processing circuitry
  • control circuitry configured to: operate the antenna arrangement in a first operating mode where the first antenna array is connected to the second TX processing circuitry and the second antenna array is connected to the first TX processing circuitry; and operate the antenna arrangement in a second operating mode where the first antenna array is connected to the first RX processing circuitry and the second antenna array is connected to the first TX processing circuitry; operate the antenna arrangement in a third operating mode where the first antenna array is connected to the second TX processing circuitry and the second antenna array is connected to the second RX processing circuitry; and operate the antenna arrangement in a fourth operating mode where the first antenna array is connected to the first RX processing circuitry and the second antenna array is connected to the second RX processing circuitry.
  • control circuitry is configured to: determine at least one parameter for reciprocity-based beamforming for transmission of a signal from the second antenna array, wherein the at least one parameter for reciprocity-based beamforming is determined based on at least one signal received at the second antenna array when the antenna arrangement is operated in the third operating mode or the fourth operating mode.
  • control circuitry is configured to: transmit at least one signal from the second antenna array based on the determined at least one parameter for reciprocity-based beamforming.
  • control circuitry is configured to: transmit at least one signal from the second antenna array based on the determined at least one parameter for reciprocity-based beamforming when the antenna arrangement is operated in the first operating mode or in the second operating mode.
  • control circuitry is configured to: determine at least one parameter for reciprocity-based beamforming for transmission of a signal from the first antenna array, wherein the at least one parameter for reciprocity-based beamforming is determined based on at least one signal received at the first antenna array when the antenna arrangement is operated in the second operating mode or the fourth operating mode.
  • control circuitry is configured to: transmit at least one signal from the first antenna array based on the determined at least one parameter for reciprocity-based beamforming.
  • control circuitry is configured to: transmit at least one signal from the first antenna array based on the determined at least one parameter for reciprocity-based beamforming when the antenna arrangement is operated in the first operating mode or in the third operating mode.
  • a network node for communicating with a wireless device in a wireless communication network wherein the network node comprises the antenna arrangement according to any of clauses Cl- C13.
  • a wireless device for communicating with a network node in a wireless communication network wherein the wireless device comprises the antenna arrangement according to any of clauses C1-C13.
  • An antenna arrangement comprising: a first antenna array comprising a plurality of antenna elements; a second antenna array comprising a plurality of antenna elements; a transmit (TX) processing circuitry for processing signals to be transmitted from the first antenna array or the second antenna array; a receive (RX) processing circuitry for processing signals received by the first antenna array or the second antenna array; wherein the first antenna array is selectively connectable to the RX processing circuitry or to the TX processing circuitry; and wherein the second antenna array is selectively connectable to the TX processing circuitry or to the RX processing circuitry.
  • TX transmit
  • RX receive
  • each array switching device is connected to both of the first TX/RX switching device and the second TX/RX switching device and configured to selectively connect the first antenna array to the RX processing circuitry or to the TX processing circuitry and to selectively connect the second antenna array to the RX processing circuitry or to the TX processing circuitry.
  • control circuitry configured to: operate the antenna arrangement in a first operating mode where the TX processing circuitry is connected to either one of the first antenna array and the second antenna array so that the antenna arrangement is configured to only transmit signals while in the first operating mode; operate the antenna arrangement in a second operating mode where the RX processing circuitry is connected to the first antenna array and the TX processing circuitry is connected to the second antenna array; operate the antenna arrangement in a third operating mode where the RX processing circuitry is connected to the second antenna array and the TX processing circuitry is connected to the first antenna array; operate the antenna arrangement in a fourth operating mode where the RX processing circuitry is connected to either one of the first antenna array and the second antenna array so that the antenna arrangement is configured to only receive signals while in the fourth operating mode.
  • control circuitry is configured to: determine at least one parameter for reciprocity-based beamforming for transmission of a signal from the first antenna array, wherein the at least one parameter for reciprocity-based beamforming is determined based on at least one signal received at the first antenna array when the antenna arrangement is operated in the second operating mode or the fourth operating mode.
  • control circuitry is configured to: determine at least one parameter for reciprocity-based beamforming for transmission of a signal from the second antenna array, wherein the at least one parameter for reciprocity-based beamforming is determined based on at least one signal received at the second antenna array when the antenna arrangement is operated in the third operating mode or the fourth operating mode.
  • D7 The antenna arrangement of any of clauses D5-D6, wherein the at least one signal received at the second antenna array is at least one sounding reference signal (SRS) or at least one Channel State Information Reference Signal (CSI-RS).
  • SRS sounding reference signal
  • CSI-RS Channel State Information Reference Signal
  • D8 The antenna arrangement of any of clauses D5-D7, wherein the control circuitry is configured to: transmit at least one signal from the second antenna array based on the determined at least one parameter for reciprocity-based beamforming.
  • control circuitry is configured to: transmit at least one signal from the second antenna array based on the determined at least one parameter for reciprocity-based beamforming when the antenna arrangement is operated in the first operating mode or the second operating mode.
  • control circuitry is configured to: transmit at least one signal from the first antenna array based on the determined at least one parameter for reciprocity-based beamforming when the antenna arrangement is operated in the first operating mode or the third operating mode.
  • a network node for communicating with a wireless device in a wireless communication network wherein the network node comprises the antenna arrangement according to any of clauses D1-D10.
  • a wireless device for communicating with a network node in a wireless communication network wherein the wireless device comprises the antenna arrangement according to any of clauses D1-D10.

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

Abstract

L'invention concerne des agencements d'antenne et des aspects associés pour la récupération de réciprocité dans des systèmes de duplex intégral de sous-bande (SBFD) et des systèmes de duplex intégral de bande (IBFD).
PCT/EP2023/061093 2022-04-28 2023-04-27 Architectures d'antenne pour récupération de réciprocité dans des systèmes de duplex intégral WO2023209078A1 (fr)

Applications Claiming Priority (2)

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US202263335853P 2022-04-28 2022-04-28
US63/335,853 2022-04-28

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WO2023209078A1 true WO2023209078A1 (fr) 2023-11-02

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210135833A1 (en) * 2019-11-02 2021-05-06 Qualcomm Incorporated Sub-band-full-duplex adaptive base station transceiver
WO2022056480A1 (fr) * 2020-09-14 2022-03-17 Qualcomm Incorporated Réciprocité de canal de station de base à panneaux multiples

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210135833A1 (en) * 2019-11-02 2021-05-06 Qualcomm Incorporated Sub-band-full-duplex adaptive base station transceiver
WO2022056480A1 (fr) * 2020-09-14 2022-03-17 Qualcomm Incorporated Réciprocité de canal de station de base à panneaux multiples

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