EP3459182A1 - Codebook to support non-coherent transmission in comp (coordinated multi-point) and nr (new radio) - Google Patents
Codebook to support non-coherent transmission in comp (coordinated multi-point) and nr (new radio)Info
- Publication number
- EP3459182A1 EP3459182A1 EP17726483.5A EP17726483A EP3459182A1 EP 3459182 A1 EP3459182 A1 EP 3459182A1 EP 17726483 A EP17726483 A EP 17726483A EP 3459182 A1 EP3459182 A1 EP 3459182A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- diagonal
- block
- matrix
- csi
- blocks
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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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
- 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
- H04B7/0413—MIMO systems
- H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
- H04B7/0478—Special codebook structures directed to feedback optimisation
Definitions
- the present disclosure relates to wireless technology, and more specifically to techniques and associated codebook structure(s) that can enable non-coherent transmission, for example, for CoMP (Coordinated Multi-Point) and/or NR (New Radio) antenna arrays.
- CoMP Coordinatd Multi-Point
- NR New Radio
- Elevation Beamforming and FD (Full Dimension)-MIMO Multiple Input Multiple Output
- LTE Long Term Evolution
- Rel-1 3 Long Term Evolution
- the Rel-13 operation of Elevation Beamforming/FD MIMO is based on two types of CSI feedback schemes: (1 ) non-precoded Channel State Information Reference signal (CSI-RS) (i.e., Class A FD-MIMO or (2) beamformed CSI-RS (i.e., Class B FD-MIMO).
- CSI-RS Channel State Information Reference signal
- Class A FD-MIMO beamformed CSI-RS
- each CSI-RS antenna port of CSI-RS resource is transmitted by the evolved Node B (eNB) without beamforming, while in Class B the beamforming on CSI-RS antenna ports is used.
- the beamforming on CSI-RS antenna ports provides an additional coverage advantage of Class B over Class A schemes. It is expected that the LTE FD-MIMO principles can be reused in the NR MIMO design.
- FIG. 1 is a block diagram illustrating an example user equipment (UE) useable in connection with various aspects described herein.
- UE user equipment
- FIG. 2 is a diagram illustrating example components of a device that can be employed in accordance with various aspects discussed herein.
- FIG. 3 is a diagram illustrating example interfaces of baseband circuitry that can be employed in accordance with various aspects discussed herein.
- FIG. 4 is a diagram illustrating two antenna array models, cross-polarized and co-polarized, that can be employed in connection with various aspects discussed herein.
- FIG. 5 is a block diagram illustrating a system employable at a UE (User Equipment) that facilitates reception of non-coherent (e.g., CoMP (co-ordinated multipoint)) and/or NR (New Radio)) transmission via a codebook structure and associated techniques, according to various aspects described herein.
- UE User Equipment
- non-coherent e.g., CoMP (co-ordinated multipoint)
- NR New Radio
- FIG. 6 is a block diagram illustrating a system employable at a BS (Base Station) that facilitates non-coherent (e.g, CoMP and/or NR) transmission via a codebook structure and associated techniques, according to various aspects described herein.
- BS Base Station
- non-coherent e.g, CoMP and/or NR
- FIG. 7 is a diagram illustrating an example scenario involving non-coherent transmission from multiple transmission points to a UE, according to various aspects discussed herein.
- FIG. 8 is a diagram illustrating a diagram of an example NR panel array, which can be employed in connection with various aspects discussed herein.
- FIG. 9 is a flow diagram of an example method employable at a UE that facilitates reception of non-coherent transmissions based on a block diagonal codebook, according to various aspects discussed herein.
- FIG. 10 is a flow diagram of an example method employable at a BS that facilitates generation of non-coherent transmissions based on a block diagonal codebook, according to various aspects discussed herein.
- a component can be a processor (e.g., a microprocessor, a controller, or other processing device), a process running on a processor, a controller, an object, an executable, a program, a storage device, a computer, a tablet PC and/or a user equipment (e.g., mobile phone, etc.) with a processing device.
- a processor e.g., a microprocessor, a controller, or other processing device
- a process running on a processor e.g., a microprocessor, a controller, or other processing device
- an object running on a server and the server
- a user equipment e.g., mobile phone, etc.
- an application running on a server and the server can also be a component.
- One or more components can reside within a process, and a component can be localized on one computer and/or distributed between two or more computers.
- a set of elements or a set of other components can be described herein, in which the term "set"
- these components can execute from various computer readable storage media having various data structures stored thereon such as with a module, for example.
- the components can communicate via local and/or remote processes such as in accordance with a signal having one or more data packets (e.g., data from one component interacting with another component in a local system, distributed system, and/or across a network, such as, the Internet, a local area network, a wide area network, or similar network with other systems via the signal).
- a signal having one or more data packets (e.g., data from one component interacting with another component in a local system, distributed system, and/or across a network, such as, the Internet, a local area network, a wide area network, or similar network with other systems via the signal).
- a component can be an apparatus with specific functionality provided by mechanical parts operated by electric or electronic circuitry, in which the electric or electronic circuitry can be operated by a software application or a firmware application executed by one or more processors.
- the one or more processors can be internal or external to the apparatus and can execute at least a part of the software or firmware application.
- a component can be an apparatus that provides specific functionality through electronic components without mechanical parts; the electronic components can include one or more processors therein to execute software and/or firmware that confer(s), at least in part, the functionality of the electronic components.
- circuitry may refer to, be part of, or include an Application Specific Integrated Circuit (ASIC), an electronic circuit, a processor (shared, dedicated, or group), and/or memory (shared, dedicated, or group) that execute one or more software or firmware programs, a combinational logic circuit, and/or other suitable hardware components that provide the described functionality.
- ASIC Application Specific Integrated Circuit
- the circuitry may be implemented in, or functions associated with the circuitry may be implemented by, one or more software or firmware modules.
- circuitry may include logic, at least partially operable in hardware.
- FIG. 1 illustrates an architecture of a system 1 00 of a network in accordance with some embodiments.
- the system 100 is shown to include a user equipment (UE) 101 and a UE 102.
- the UEs 101 and 102 are illustrated as smartphones (e.g., handheld touchscreen mobile computing devices connectable to one or more cellular networks), but may also comprise any mobile or non-mobile computing device, such as Personal Data Assistants (PDAs), pagers, laptop computers, desktop computers, wireless handsets, or any computing device including a wireless communications interface.
- PDAs Personal Data Assistants
- pagers pagers
- laptop computers desktop computers
- wireless handsets or any computing device including a wireless communications interface.
- any of the UEs 101 and 102 can comprise an Internet of Things (loT) UE, which can comprise a network access layer designed for low-power loT applications utilizing short-lived UE connections.
- An loT UE can utilize technologies such as machine-to-machine (M2M) or machine-type communications (MTC) for exchanging data with an MTC server or device via a public land mobile network (PLMN), Proximity-Based Service (ProSe) or device-to-device (D2D) communication, sensor networks, or loT networks.
- M2M or MTC exchange of data may be a machine-initiated exchange of data.
- loT network describes interconnecting loT UEs, which may include uniquely identifiable embedded computing devices (within the Internet infrastructure), with short-lived connections.
- the loT UEs may execute background applications (e.g., keep-alive messages, status updates, etc.) to facilitate the connections of the loT network.
- the UEs 101 and 102 may be configured to connect, e.g., communicatively couple, with a radio access network (RAN) 1 10—
- the RAN 1 10 may be, for example, an Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN), a NextGen RAN (NG RAN), or some other type of RAN.
- UMTS Evolved Universal Mobile Telecommunications System
- E-UTRAN Evolved Universal Mobile Telecommunications System
- NG RAN NextGen RAN
- the UEs 101 and 102 utilize connections 103 and 104, respectively, each of which comprises a physical communications interface or layer (discussed in further detail below); in this example, the connections 103 and 104 are illustrated as an air interface to enable communicative coupling, and can be consistent with cellular communications protocols, such as a Global System for Mobile Communications (GSM) protocol, a code-division multiple access (CDMA) network protocol, a Push-to-Talk (PTT) protocol, a PTT over Cellular (POC) protocol, a Universal Mobile Telecommunications System (UMTS) protocol, a 3GPP Long Term Evolution (LTE) protocol, a fifth generation (5G) protocol, a New Radio (NR) protocol, and the like.
- GSM Global System for Mobile Communications
- CDMA code-division multiple access
- PTT Push-to-Talk
- POC PTT over Cellular
- UMTS Universal Mobile Telecommunications System
- LTE Long Term Evolution
- 5G fifth generation
- NR New Radio
- the UEs 101 and 1 02 may further directly exchange communication data via a ProSe interface 105.
- the ProSe interface 105 may
- a sidelink interface comprising one or more logical channels, including but not limited to a Physical Sidelink Control Channel (PSCCH), a Physical Sidelink Shared Channel (PSSCH), a Physical Sidelink Discovery Channel (PSDCH), and a Physical Sidelink Broadcast Channel (PSBCH).
- PSCCH Physical Sidelink Control Channel
- PSSCH Physical Sidelink Shared Channel
- PSDCH Physical Sidelink Discovery Channel
- PSBCH Physical Sidelink Broadcast Channel
- the UE 102 is shown to be configured to access an access point (AP) 106 via connection 107.
- the connection 107 can comprise a local wireless connection, such as a connection consistent with any IEEE 802.1 1 protocol, wherein the AP 106 would comprise a wireless fidelity (WiFi®) router.
- WiFi® wireless fidelity
- the AP 1 06 is shown to be connected to the Internet without connecting to the core network of the wireless system (described in further detail below).
- the RAN 1 1 0 can include one or more access nodes that enable the connections 1 03 and 104.
- These access nodes (ANs) can be referred to as base stations (BSs), NodeBs, evolved NodeBs (eNBs), next Generation NodeBs (gNB), RAN nodes, and so forth, and can comprise ground stations (e.g., terrestrial access points) or satellite stations providing coverage within a geographic area (e.g., a cell).
- BSs base stations
- eNBs evolved NodeBs
- gNB next Generation NodeBs
- RAN nodes and so forth, and can comprise ground stations (e.g., terrestrial access points) or satellite stations providing coverage within a geographic area (e.g., a cell).
- the RAN 1 1 0 may include one or more RAN nodes for providing macrocells, e.g., macro RAN node 1 1 1 , and one or more RAN nodes for providing femtocells or picocells (e.g., cells having smaller coverage areas, smaller user capacity, or higher bandwidth compared to macrocells), e.g., low power (LP) RAN node 1 12.
- RAN nodes for providing macrocells e.g., macro RAN node 1 1 1
- femtocells or picocells e.g., cells having smaller coverage areas, smaller user capacity, or higher bandwidth compared to macrocells
- LP low power
- any of the RAN nodes 1 1 1 and 1 12 can terminate the air interface protocol and can be the first point of contact for the UEs 101 and 102.
- any of the RAN nodes 1 1 1 and 1 12 can fulfill various logical functions for the RAN 1 1 0 including, but not limited to, radio network controller (RNC) functions such as radio bearer management, uplink and downlink dynamic radio resource management and data packet scheduling, and mobility management.
- RNC radio network controller
- the UEs 101 and 102 can be configured to communicate using Orthogonal Frequency-Division Multiplexing (OFDM) communication signals with each other or with any of the RAN nodes 1 1 1 and 1 1 2 over a multicarrier communication channel in accordance various communication techniques, such as, but not limited to, an Orthogonal Frequency-Division Multiple Access (OFDMA) communication technique (e.g., for downlink communications) or a Single Carrier Frequency Division Multiple Access (SC-FDMA) communication technique (e.g., for uplink and ProSe or sidelink communications), although the scope of the embodiments is not limited in this respect.
- OFDM signals can comprise a plurality of orthogonal subcarriers.
- a downlink resource grid can be used for downlink transmissions from any of the RAN nodes 1 1 1 and 1 12 to the UEs 101 and 1 02, while uplink transmissions can utilize similar techniques.
- the grid can be a time-frequency grid, called a resource grid or time-frequency resource grid, which is the physical resource in the downlink in each slot.
- a time-frequency plane representation is a common practice for OFDM systems, which makes it intuitive for radio resource allocation.
- Each column and each row of the resource grid corresponds to one OFDM symbol and one OFDM subcarrier, respectively.
- the duration of the resource grid in the time domain corresponds to one slot in a radio frame.
- the smallest time-frequency unit in a resource grid is denoted as a resource element.
- Each resource grid comprises a number of resource blocks, which describe the mapping of certain physical channels to resource elements.
- Each resource block comprises a collection of resource elements; in the frequency domain, this may represent the smallest quantity of resources that currently can be allocated.
- the physical downlink shared channel may carry user data and higher-layer signaling to the UEs 101 and 102.
- the physical downlink control channel (PDCCH) may carry information about the transport format and resource allocations related to the PDSCH channel, among other things. It may also inform the UEs 101 and 102 about the transport format, resource allocation, and H-ARQ (Hybrid Automatic Repeat Request) information related to the uplink shared channel.
- downlink scheduling (assigning control and shared channel resource blocks to the UE 102 within a cell) may be performed at any of the RAN nodes 1 1 1 and 1 12 based on channel quality information fed back from any of the UEs 101 and 102.
- the downlink resource assignment information may be sent on the PDCCH used for (e.g., assigned to) each of the UEs 101 and 1 02.
- the PDCCH may use control channel elements (CCEs) to convey the control information.
- CCEs control channel elements
- the PDCCH complex-valued symbols may first be organized into quadruplets, which may then be permuted using a sub-block interleaver for rate matching.
- Each PDCCH may be transmitted using one or more of these CCEs, where each CCE may correspond to nine sets of four physical resource elements known as resource element groups (REGs).
- RAGs resource element groups
- QPSK Quadrature Phase Shift Keying
- the PDCCH can be transmitted using one or more CCEs, depending on the size of the downlink control information (DCI) and the channel condition.
- DCI downlink control information
- There can be four or more different PDCCH formats defined in LTE with different numbers of CCEs (e.g., aggregation level, L 1 , 2, 4, or 8).
- Some embodiments may use concepts for resource allocation for control channel information that are an extension of the above-described concepts.
- some embodiments may utilize an enhanced physical downlink control channel (EPDCCH) that uses PDSCH resources for control information transmission.
- the EPDCCH may be transmitted using one or more enhanced the control channel elements (ECCEs). Similar to above, each ECCE may correspond to nine sets of four physical resource elements known as an enhanced resource element groups (EREGs). An ECCE may have other numbers of EREGs in some situations.
- EPCCH enhanced physical downlink control channel
- ECCEs enhanced the control channel elements
- each ECCE may correspond to nine sets of four physical resource elements known as an enhanced resource element groups (EREGs).
- EREGs enhanced resource element groups
- An ECCE may have other numbers of EREGs in some situations.
- the RAN 1 1 0 is shown to be communicatively coupled to a core network (CN) 1 20— via an S1 interface 1 1 3.
- the CN 120 may be an evolved packet core (EPC) network, a NextGen Packet Core (NPC) network, or some other type of CN.
- EPC evolved packet core
- NPC NextGen Packet Core
- the S1 interface 1 13 is split into two parts: the S1 -U interface 1 14, which carries traffic data between the RAN nodes 1 1 1 and 1 12 and the serving gateway (S-GW) 122, and the S1 -mobility management entity (MME) interface 1 15, which is a signaling interface between the RAN nodes 1 1 1 and 1 12 and MMEs 121 .
- MME mobility management entity
- the CN 1 20 comprises the MMEs 121 , the S-GW 122, the Packet Data Network (PDN) Gateway (P-GW) 123, and a home subscriber server (HSS) 124.
- the MMEs 121 may be similar in function to the control plane of legacy Serving General Packet Radio Service (GPRS) Support Nodes (SGSN).
- the MMEs 121 may manage mobility aspects in access such as gateway selection and tracking area list management.
- the HSS 124 may comprise a database for network users, including subscription-related information to support the network entities' handling of communication sessions.
- the CN 120 may comprise one or several HSSs 124, depending on the number of mobile subscribers, on the capacity of the equipment, on the organization of the network, etc.
- the HSS 124 can provide support for routing/roaming, authentication, authorization, naming/addressing resolution, location dependencies, etc.
- the S-GW 122 may terminate the S1 interface 1 13 towards the RAN 1 10, and routes data packets between the RAN 1 10 and the CN 120.
- the S-GW 122 may be a local mobility anchor point for inter-RAN node handovers and also may provide an anchor for inter-3GPP mobility. Other responsibilities may include lawful intercept, charging, and some policy enforcement.
- the P-GW 123 may terminate an SGi interface toward a PDN.
- the P-GW 123 may route data packets between the EPC network 123 and external networks such as a network including the application server 130 (alternatively referred to as application function (AF)) via an Internet Protocol (IP) interface 125.
- the application server 130 may be an element offering applications that use IP bearer resources with the core network (e.g., UMTS Packet Services (PS) domain, LTE PS data services, etc.).
- PS UMTS Packet Services
- LTE PS data services etc.
- the P-GW 123 is shown to be communicatively coupled to an application server 130 via an IP communications interface 125.
- the application server 130 can also be configured to support one or more communication services (e.g., Voice-over-Internet Protocol (VoIP) sessions, PTT sessions, group communication sessions, social networking services, etc.) for the UEs 101 and 102 via the CN 120.
- VoIP Voice-over-Internet Protocol
- PTT sessions PTT sessions
- group communication sessions social networking services, etc.
- the P-GW 123 may further be a node for policy enforcement and charging data collection.
- Policy and Charging Enforcement Function (PCRF) 126 is the policy and charging control element of the CN 120.
- PCRF Policy and Charging Enforcement Function
- HPLMN Home Public Land Mobile Network
- IP-CAN Internet Protocol Connectivity Access Network
- HPLMN Home Public Land Mobile Network
- V-PCRF Visited PCRF
- VPLMN Visited Public Land Mobile Network
- the PCRF 126 may be communicatively coupled to the application server 130 via the P-GW 123.
- the application server 130 may signal the PCRF 126 to indicate a new service flow and select the appropriate Quality of Service (QoS) and charging parameters.
- the PCRF 126 may provision this rule into a Policy and Charging Enforcement Function (PCEF) (not shown) with the appropriate traffic flow template (TFT) and QoS class of identifier (QCI), which commences the QoS and charging as specified by the application server 130.
- PCEF Policy and Charging Enforcement Function
- TFT traffic flow template
- QCI QoS class of identifier
- FIG. 2 illustrates example components of a device 200 in accordance with some embodiments.
- the device 200 may include application circuitry 202, baseband circuitry 204, Radio Frequency (RF) circuitry 206, front-end module (FEM) circuitry 208, one or more antennas 21 0, and power management circuitry (PMC) 21 2 coupled together at least as shown.
- the components of the illustrated device 200 may be included in a UE or a RAN node.
- the device 200 may include less elements (e.g., a RAN node may not utilize application circuitry 202, and instead include a processor/controller to process IP data received from an EPC).
- the device 200 may include additional elements such as, for example, memory/storage, display, camera, sensor, or input/output (I/O) interface.
- the components described below may be included in more than one device (e.g., said circuitries may be separately included in more than one device for Cloud-RAN (C-RAN) implementations).
- C-RAN Cloud-RAN
- the application circuitry 202 may include one or more application processors.
- the application circuitry 202 may include circuitry such as, but not limited to, one or more single-core or multi-core processors.
- the processor(s) may include any combination of general-purpose processors and dedicated processors (e.g., graphics processors, application processors, etc.).
- the processors may be coupled with or may include memory/storage and may be configured to execute instructions stored in the memory/storage to enable various applications or operating systems to run on the device 200.
- processors of application circuitry 202 may process IP data packets received from an EPC.
- the baseband circuitry 204 may include circuitry such as, but not limited to, one or more single-core or multi-core processors.
- the baseband circuitry 204 may include one or more baseband processors or control logic to process baseband signals received from a receive signal path of the RF circuitry 206 and to generate baseband signals for a transmit signal path of the RF circuitry 206.
- Baseband processing circuity 204 may interface with the application circuitry 202 for generation and processing of the baseband signals and for controlling operations of the RF circuitry 206.
- the baseband circuitry 204 may include a third generation (3G) baseband processor 204A, a fourth generation (4G) baseband processor 204B, a fifth generation (5G) baseband processor 204C, or other baseband processor(s) 204D for other existing generations, generations in development or to be developed in the future (e.g., second generation (2G), sixth generation (6G), etc.).
- the baseband circuitry 204 e.g., one or more of baseband processors 204A-D
- baseband processors 204A-D may be included in modules stored in the memory 204G and executed via a Central Processing Unit (CPU) 204E.
- the radio control functions may include, but are not limited to, signal modulation/demodulation, encoding/decoding, radio frequency shifting, etc.
- modulation/demodulation circuitry of the baseband circuitry 204 may include Fast-Fourier Transform (FFT), precoding, or constellation mapping/demapping functionality.
- FFT Fast-Fourier Transform
- encoding/decoding circuitry of the baseband circuitry 204 may include convolution, tail- biting convolution, turbo, Viterbi, or Low Density Parity Check (LDPC) encoder/decoder functionality.
- LDPC Low Density Parity Check
- the baseband circuitry 204 may include one or more audio digital signal processor(s) (DSP) 204F.
- the audio DSP(s) 204F may be include elements for compression/decompression and echo cancellation and may include other suitable processing elements in other embodiments.
- Components of the baseband circuitry may be suitably combined in a single chip, a single chipset, or disposed on a same circuit board in some embodiments.
- some or all of the constituent components of the baseband circuitry 204 and the application circuitry 202 may be implemented together such as, for example, on a system on a chip (SOC).
- SOC system on a chip
- the baseband circuitry 204 may provide for communication compatible with one or more radio technologies.
- the baseband circuitry 204 may support communication with an evolved universal terrestrial radio access network (EUTRAN) or other wireless metropolitan area networks (WMAN), a wireless local area network (WLAN), a wireless personal area network (WPAN).
- EUTRAN evolved universal terrestrial radio access network
- WMAN wireless metropolitan area networks
- WLAN wireless local area network
- WPAN wireless personal area network
- Embodiments in which the baseband circuitry 204 is configured to support radio communications of more than one wireless protocol may be referred to as multi-mode baseband circuitry.
- RF circuitry 206 may enable communication with wireless networks using modulated electromagnetic radiation through a non-solid medium.
- the RF circuitry 206 may include switches, filters, amplifiers, etc. to facilitate the communication with the wireless network.
- RF circuitry 206 may include a receive signal path which may include circuitry to down-convert RF signals received from the FEM circuitry 208 and provide baseband signals to the baseband circuitry 204.
- RF circuitry 206 may also include a transmit signal path which may include circuitry to up-convert baseband signals provided by the baseband circuitry 204 and provide RF output signals to the FEM circuitry 208 for transmission.
- the receive signal path of the RF circuitry 206 may include mixer circuitry 206a, amplifier circuitry 206b and filter circuitry 206c.
- the transmit signal path of the RF circuitry 206 may include filter circuitry 206c and mixer circuitry 206a.
- RF circuitry 206 may also include synthesizer circuitry 206d for synthesizing a frequency for use by the mixer circuitry 206a of the receive signal path and the transmit signal path.
- the mixer circuitry 206a of the receive signal path may be configured to down-convert RF signals received from the FEM circuitry 208 based on the synthesized frequency provided by synthesizer circuitry 206d.
- the amplifier circuitry 206b may be configured to amplify the down- converted signals and the filter circuitry 206c may be a low-pass filter (LPF) or bandpass filter (BPF) configured to remove unwanted signals from the down-converted signals to generate output baseband signals.
- Output baseband signals may be provided to the baseband circuitry 204 for further processing.
- the output baseband signals may be zero-frequency baseband signals, although this is not a requirement.
- mixer circuitry 206a of the receive signal path may comprise passive mixers, although the scope of the embodiments is not limited in this respect.
- the mixer circuitry 206a of the transmit signal path may be configured to up-convert input baseband signals based on the synthesized frequency provided by the synthesizer circuitry 206d to generate RF output signals for the FEM circuitry 208.
- the baseband signals may be provided by the baseband circuitry 204 and may be filtered by filter circuitry 206c.
- the mixer circuitry 206a of the receive signal path and the mixer circuitry 206a of the transmit signal path may include two or more mixers and may be arranged for quadrature downconversion and upconversion, respectively.
- the mixer circuitry 206a of the receive signal path and the mixer circuitry 206a of the transmit signal path may include two or more mixers and may be arranged for image rejection (e.g., Hartley image rejection).
- the mixer circuitry 206a of the receive signal path and the mixer circuitry 206a may be arranged for direct downconversion and direct upconversion, respectively.
- the mixer circuitry 206a of the receive signal path and the mixer circuitry 206a of the transmit signal path may be configured for super-heterodyne operation.
- the output baseband signals and the input baseband signals may be analog baseband signals, although the scope of the embodiments is not limited in this respect.
- the output baseband signals and the input baseband signals may be digital baseband signals.
- the RF circuitry 206 may include analog-to-digital converter (ADC) and digital-to-analog converter (DAC) circuitry and the baseband circuitry 204 may include a digital baseband interface to communicate with the RF circuitry 206.
- ADC analog-to-digital converter
- DAC digital-to-analog converter
- a separate radio IC circuitry may be provided for processing signals for each spectrum, although the scope of the
- the synthesizer circuitry 206d may be a fractional-N synthesizer or a fractional N/N+1 synthesizer, although the scope of the embodiments is not limited in this respect as other types of frequency synthesizers may be suitable.
- synthesizer circuitry 206d may be a delta-sigma synthesizer, a frequency multiplier, or a synthesizer comprising a phase-locked loop with a frequency divider.
- the synthesizer circuitry 206d may be configured to synthesize an output frequency for use by the mixer circuitry 206a of the RF circuitry 206 based on a frequency input and a divider control input.
- the synthesizer circuitry 206d may be a fractional N/N+1 synthesizer.
- frequency input may be provided by a voltage controlled oscillator (VCO), although that is not a requirement.
- VCO voltage controlled oscillator
- Divider control input may be provided by either the baseband circuitry 204 or the applications processor 202 depending on the desired output frequency.
- a divider control input (e.g., N) may be determined from a look-up table based on a channel indicated by the applications processor 202.
- Synthesizer circuitry 206d of the RF circuitry 206 may include a divider, a delay-locked loop (DLL), a multiplexer and a phase accumulator.
- the divider may be a dual modulus divider (DMD) and the phase accumulator may be a digital phase accumulator (DPA).
- the DMD may be configured to divide the input signal by either N or N+1 (e.g., based on a carry out) to provide a fractional division ratio.
- the DLL may include a set of cascaded, tunable, delay elements, a phase detector, a charge pump and a D-type flip- flop.
- the delay elements may be configured to break a VCO period up into Nd equal packets of phase, where Nd is the number of delay elements in the delay line.
- Nd is the number of delay elements in the delay line.
- synthesizer circuitry 206d may be configured to generate a carrier frequency as the output frequency, while in other embodiments, the output frequency may be a multiple of the carrier frequency (e.g., twice the carrier frequency, four times the carrier frequency) and used in conjunction with quadrature generator and divider circuitry to generate multiple signals at the carrier frequency with multiple different phases with respect to each other.
- the output frequency may be a LO frequency (fLO).
- the RF circuitry 206 may include an IQ/polar converter.
- FEM circuitry 208 may include a receive signal path which may include circuitry configured to operate on RF signals received from one or more antennas 210, amplify the received signals and provide the amplified versions of the received signals to the RF circuitry 206 for further processing.
- FEM circuitry 208 may also include a transmit signal path which may include circuitry configured to amplify signals for transmission provided by the RF circuitry 206 for transmission by one or more of the one or more antennas 21 0.
- the amplification through the transmit or receive signal paths may be done solely in the RF circuitry 206, solely in the FEM 208, or in both the RF circuitry 206 and the FEM 208.
- the FEM circuitry 208 may include a TX/RX switch to switch between transmit mode and receive mode operation.
- the FEM circuitry may include a receive signal path and a transmit signal path.
- the receive signal path of the FEM circuitry may include an LNA to amplify received RF signals and provide the amplified received RF signals as an output (e.g., to the RF circuitry 206).
- the transmit signal path of the FEM circuitry 208 may include a power amplifier (PA) to amplify input RF signals (e.g., provided by RF circuitry 206), and one or more filters to generate RF signals for subsequent transmission (e.g., by one or more of the one or more antennas 210).
- PA power amplifier
- the PMC 212 may manage power provided to the baseband circuitry 204.
- the PMC 21 2 may control power-source selection, voltage scaling, battery charging, or DC-to-DC conversion.
- the PMC 212 may often be included when the device 200 is capable of being powered by a battery, for example, when the device is included in a UE.
- the PMC 21 2 may increase the power conversion efficiency while providing desirable implementation size and heat dissipation
- FIG. 2 shows the PMC 212 coupled only with the baseband circuitry 204.
- the PMC 2 12 may be additionally or alternatively coupled with, and perform similar power management operations for, other components such as, but not limited to, application circuitry 202, RF circuitry 206, or FEM 208.
- the PMC 212 may control, or otherwise be part of, various power saving mechanisms of the device 200. For example, if the device 200 is in an RRC_Connected state, where it is still connected to the RAN node as it expects to receive traffic shortly, then it may enter a state known as Discontinuous Reception Mode (DRX) after a period of inactivity. During this state, the device 200 may power down for brief intervals of time and thus save power.
- DRX Discontinuous Reception Mode
- the device 200 may transition off to an RRCJdle state, where it disconnects from the network and does not perform operations such as channel quality feedback, handover, etc.
- the device 200 goes into a very low power state and it performs paging where again it periodically wakes up to listen to the network and then powers down again.
- the device 200 may not receive data in this state, in order to receive data, it must transition back to RRC_Connected state.
- An additional power saving mode may allow a device to be unavailable to the network for periods longer than a paging interval (ranging from seconds to a few hours). During this time, the device is totally unreachable to the network and may power down completely. Any data sent during this time incurs a large delay and it is assumed the delay is acceptable.
- Processors of the application circuitry 202 and processors of the baseband circuitry 204 may be used to execute elements of one or more instances of a protocol stack.
- processors of the baseband circuitry 204 may be used execute Layer 3, Layer 2, or Layer 1 functionality, while processors of the application circuitry 204 may utilize data (e.g., packet data) received from these layers and further execute Layer 4 functionality (e.g., transmission communication protocol (TCP) and user datagram protocol (UDP) layers).
- Layer 3 may comprise a radio resource control (RRC) layer, described in further detail below.
- RRC radio resource control
- Layer 2 may comprise a medium access control (MAC) layer, a radio link control (RLC) layer, and a packet data convergence protocol (PDCP) layer, described in further detail below.
- Layer 1 may comprise a physical (PHY) layer of a UE/RAN node, described in further detail below.
- FIG. 3 illustrates example interfaces of baseband circuitry in accordance with some embodiments.
- the baseband circuitry 204 of FIG. 2 may comprise processors 204A-204E and a memory 204G utilized by said processors.
- Each of the processors 204A-204E may include a memory interface, 304A-304E,
- the baseband circuitry 204 may further include one or more interfaces to communicatively couple to other circuitries/devices, such as a memory interface 312 (e.g., an interface to send/receive data to/from memory external to the baseband circuitry 204), an application circuitry interface 314 (e.g., an interface to send/receive data to/from the application circuitry 202 of FIG. 2), an RF circuitry interface 316 (e.g., an interface to send/receive data to/from RF circuitry 206 of FIG.
- a memory interface 312 e.g., an interface to send/receive data to/from memory external to the baseband circuitry 204
- an application circuitry interface 314 e.g., an interface to send/receive data to/from the application circuitry 202 of FIG. 2
- an RF circuitry interface 316 e.g., an interface to send/receive data to/from RF circuitry 206 of FIG.
- a wireless hardware connectivity interface 31 8 e.g., an interface to send/receive data to/from Near Field Communication (NFC) components, Bluetooth® components (e.g., Bluetooth® Low Energy), Wi-Fi® components, and other communication components
- a power management interface 320 e.g., an interface to send/receive power or control signals to/from the PMC 212).
- FIG. 4 illustrated is a diagram showing two antenna array models, cross-polarized and co-polarized, that can be employed in connection with various aspects discussed herein.
- the antenna array discussed in 3GPP (Third) discussed in 3GPP (Third
- MIMO design is a 2D (Two Dimensional) planar antenna array, where antenna elements can be placed in the vertical and horizontal direction as illustrated in FIG. 4, where N is the number of columns, M is the number of antenna elements with the same polarization in each column. Antenna elements can be uniformly spaced in the horizontal direction with a spacing of dH and in the vertical direction with a spacing of dV.
- System 500 can include one or more processors 510 (e.g., one or more baseband processors such as one or more of the baseband processors discussed in connection with FIG. 2 and/or FIG. 3) comprising processing circuitry and associated memory interface(s) (e.g., memory interface(s) discussed in connection with FIG.
- processors 510 e.g., one or more baseband processors such as one or more of the baseband processors discussed in connection with FIG. 2 and/or FIG. 3
- processing circuitry and associated memory interface(s) e.g., memory interface(s) discussed in connection with FIG.
- transceiver circuitry 520 e.g., comprising one or more of transmitter circuitry or receiver circuitry, which can employ common circuit elements, distinct circuit elements, or a combination thereof
- memory 530 which can comprise any of a variety of storage mediums and can store instructions and/or data associated with one or more of processor(s) 510 or transceiver circuitry 520.
- system 500 can be included within a user equipment (UE). As described in greater detail below, system 500 can facilitate reception of noncoherent transmission(s) at a UE based on a block diagonal codebook and associated techniques discussed herein.
- System 600 can include one or more processors 61 0 (e.g., one or more baseband processors such as one or more of the baseband processors discussed in connection with FIG. 2 and/or FIG. 3) comprising processing circuitry and associated memory interface(s) (e.g., memory interface(s) discussed in connection with FIG.
- processors 61 0 e.g., one or more baseband processors such as one or more of the baseband processors discussed in connection with FIG. 2 and/or FIG. 3
- processing circuitry and associated memory interface(s) e.g., memory interface(s) discussed in connection with FIG.
- communication circuitry 620 e.g., which can comprise circuitry for one or more wired (e.g., X2, etc.) connections and/or transceiver circuitry that can comprise one or more of transmitter circuitry (e.g., associated with one or more transmit chains) or receiver circuitry (e.g., associated with one or more receive chains), wherein the transmitter circuitry and receiver circuitry can employ common circuit elements, distinct circuit elements, or a combination thereof), and memory 630 (which can comprise any of a variety of storage mediums and can store instructions and/or data associated with one or more of processor(s) 610 or communication circuitry 620).
- wired e.g., X2, etc.
- system 600 can be included within an Evolved Universal Terrestrial Radio Access Network (E- UTRAN) Node B (Evolved Node B, eNodeB, or eNB) or other base station in a wireless communications network.
- the processor(s) 610, communication circuitry 620, and the memory 630 can be included in a single device, while in other aspects, they can be included in different devices, such as part of a distributed architecture.
- system 600 can facilitate noncoherent transmission (e.g., CoMP and/or NR) by a BS based on a block diagonal codebook and associated techniques discussed herein.
- signals and/or messages can be generated and output for transmission, and/or transmitted messages can be received and processed.
- outputting for transmission can comprise one or more of the following: generating a set of associated bits that indicate the content of the signal or message, coding (e.g., which can include adding a cyclic redundancy check (CRC) and/or coding via one or more of turbo code, low density parity-check (LDPC) code, tailbiting convolution code (TBCC), etc.), scrambling (e.g., based on a scrambling seed), modulating (e.g., via one of binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), or some form of quadrature amplitude modulation (QAM), etc.), and/or resource mapping (e.g., to a scheduled set of resources, to
- processing can comprise one or more of: identifying physical resources associated with the signal/message, detecting the signal/message, resource element group deinterleaving, demodulation, descrambling, and/or decoding.
- the Class A codebook for a uniform antenna array has W ! W 2 , where the ⁇ code word can be composed from two DFT (Discrete Fourier Transform) vectors and follow a KP (Kronecker Product) structure, for example, (a) X t is Oi oversampled DFT
- Ni and N 2 correspond to the number of APs (Antenna Ports) in the first and second dimension (e.g., m 1 is horizontal and m 2 is vertical, or vice versa), and 0 1 and 0 2 correspond to the DFT (beam) oversampling.
- non-coherent transmission can be employed as a MIMO (Multiple Input Multiple Output) scheme between one or more BSs employing a system 600 and one or more UEs employing a system 500, where the MIMO layer (e.g., generated by processor(s) 610) can be sent (e.g., via communication circuitry 620) with the precoding using a subset of antenna ports (e.g., which can be a proper subset wherein not all antenna ports are used to send the MIMO layer with that precoding), which can be received via transceiver circuitry 520 and processed (e.g., in a manner that can depend on the type of signal/message) by processor(s) 510.
- MIMO Multiple Input Multiple Output
- FIG. 7 illustrated is a diagram of an example scenario involving non-coherent transmission from multiple transmission points (71 OA and 71 OB, each of which can comprise an embodiment of system 600) to a UE (720, which can comprise an embodiment of system 500), according to various aspects discussed herein.
- the antenna model for NR can be a generalized version of the antenna array of 3GPP (Third Generation Partnership Project TR 36.897, which can allow for more freedom in the placement of antennas as follows.
- the 1 D/2D antenna array as in TR 36.897 (e.g., as illustrated in FIG. 4) can be considered an antenna panel, which can comprise ( ⁇ , ⁇ , ⁇ ) antenna elements (e.g., M (# of columns) ⁇ N (# of rows) ⁇ P (# of polarizations)), as described in connection with FD-MIMO aspects of TR 36.897.
- M # of columns
- N # of rows
- P # of polarizations
- a uniform 1 D/2D rectangular panel array can comprise (Mg,Ng) antenna panels per column and row respectively, and can have uniform (d g, H, d g, v) panel spacing in the horizontal and vertical directions, respectively.
- the panels in the NR antenna model may not be calibrated and even may not be synchronized. In such scenarios, precoding across antenna ports corresponding to all antenna arrays may not be feasible.
- a block diagonal codebook structure discussed herein can be employed in a variety of scenarios involving non-coherent transmissions, such as CoMP and/or transmissions via a NR antenna array.
- Various embodiments can employ a block diagonal codebook structure to support non coherent transmission from different antenna arrays (e.g., via
- each block of the precoder can have a Kronecker product structure to support beamforming on an associated subset of antenna ports. Equation (2), below, provides an example of a block diagonal precoder structure for an embodiment involving two groups of antenna ports:
- 1 and 1 are the matrices determining the subset of the beams for antenna groups 1 and 2 (e.g., which can correspond to disjoint (e.g. non-overlapping) sets of
- antenna ports respectively
- 2 and 2 are the beam selection and polarization co-phasing matrices for antenna groups 1 and 2, respectively.
- a common beam selection and polarization co-phasing matrix j can be employed for
- aspects employing a common beam selection and polarization co-phasing matrix can have reduced overhead, but can potentially have reduced performance.
- the structure of 2 and 2 or 2 can also follow the structure of a conventional Class A codebook and can comprise the selection vectors (e.g., vectors comprising "0"s and/or "1 "s) multiplied by complex co- phasing elements exp ⁇ ja ⁇ responsible for beam co-phasing(s) corresponding to different antenna element polarization(s).
- selection vectors e.g., vectors comprising "0"s and/or "1 "s
- the CSI-RS APs (antenna ports) for CSI feedback transmitted by the antenna array of the serving TP(s) can be non-QCL-ed (non-Quasi Co-Located) with each other with respect to timing offset, delay spread, frequency offset and gain (e.g., wherein processor(s) 510 can separately measure and/or determine characteristics/parameters for antenna ports which are non-QCL-ed).
- two or more groups of antenna ports can be quasi co-located (e.g., wherein processor(s) 510 can assume that characteristics/parameters for which antenna ports are QCL-ed have identical values for the QCL-ed APs) but not necessarily quasi co- located with another antenna port group.
- whether groups of antenna ports are QCL-ed can be indicated via higher layer (e.g., RRC (Radio Resource
- signaling e.g., generated by processor(s) 610, transmitted by
- transceiver circuitry 520 received by transceiver circuitry 520, and processed by processor(s) 510).
- block diagonal codebooks and associated techniques discussed herein can be employed to facilitate non-coherent transmissions.
- the block diagonal codebook structure comprises two diagonal blocks, indicated by superscript (e.g., (1) and (2) ).
- techniques discussed herein can be employed in connection with two or more (e.g., N for N>2) antenna groups (e.g., antenna arrays and/or antenna panels), wherein the block diagonal codebook structure can comprise two or more diagonal (e.g., N for N>2) blocks that can be indicated by superscript (e.g., (1) to (N) ).
- eNB or other TP or BS, e.g., transmitted via communication circuitry 620
- UE e.g., which can receive the codebook configuration parameter(s) via transceiver circuitry 520, process the codebook configuration parameter(s) via processor(s) 510, which can also send the codebook configuration parameter(s) to a memory 530 via a memory interface of processor(s) 510).
- the codebook configuration parameter(s) can correspond to a codebook with a block diagonal structure associated with two or more subsets (e.g., disjoint subsets) of antenna ports, as described in greater detail herein.
- the UE can generate (e.g., via processor(s) 510) codewords based at least in part on the indicated codebook configuration parameter(s).
- the eNB can generate (e.g., via processor(s) 610) and transmit (e.g., via communication circuitry 620) reference signals (e.g., CSI (Channel State lnformation)-RS (Reference Signals), etc.) in connection with at least one of the subsets of antenna ports.
- reference signals e.g., CSI (Channel State lnformation)-RS (Reference Signals), etc.
- the UE can receive (e.g., via transceiver circuitry 520) the reference signals and can perform channel measurements (e.g., via processor(s) 510) on the reference signals. Based on the performed channel measurements, the UE can generate (e.g., via processor(s) 51 0) one or more CSI parameters such as CQI (Channel Quality Indicator), PMI (Precoding Matrix Indicator), Rl (Rank Indicator), PTI (Precoding Type Indicator), and/or CRI (CSI Resource Indicator). The UE can select (e.g., via processor(s) 510) a best codeword of the generated codewords from the codebook based on the channel measurements.
- CQI Channel Quality Indicator
- PMI Precoding Matrix Indicator
- Rl Rank Indicator
- PTI Precoding Type Indicator
- CRI CSI Resource Indicator
- the UE can report the index of the selected best codeword to the eNB along with other information determined based on the reference signals (e.g., along with other CSI information (e.g., one or more CSI parameters, as part of a CSI report) generated by processor(s) 510 and transmitted via transceiver circuitry 520 (e.g., which can be received via communication circuitry 620 and processed by processor(s) 620).
- other CSI information e.g., one or more CSI parameters, as part of a CSI report
- the block diagonal codebook can comprise precoding matrices containing two or more sets of vectors that apply precoding to the two or more subsets of antenna ports.
- each vector of the two or more sets of vectors can comprise a concatenation of a zero vector and a non-zero vector in a different order.
- each vector comprising one or more non-zero elements can correspond to a Kronecker product of one or more DFT vectors.
- the codebook configuration parameter(s) can comprise a number of blocks in the block diagonal matrix.
- the codebook configuration parameter(s) can comprise an associated number of antenna ports for each block (e.g., which can determine the number of rows in the block) in the block diagonal matrix.
- the codebook configuration parameter(s) comprise the associated number of antenna ports in the block and an associated DFT oversampling for each block.
- the reference signals generated by the eNB can comprise Channel State Information reference signals (CSI-RS).
- CSI-RS Channel State Information reference signals
- the number of antenna ports for CSI-RS can correspond to the number of antenna ports in each block of the block diagonal matrix.
- the CSI-RS can comprise two or more CSI-RS resource configurations.
- the CSI-RS antenna ports can be non-quasi co-located with each other with respect to timing offset, delay spread, frequency offset and gain.
- the CSI-RS antenna ports can be non- quasi co-located between CSI-RS resource configurations and can be quasi co-located within each CSI-RS resource configuration.
- a machine readable medium can store instructions associated with method 900 that, when executed, can cause a UE to perform the acts of method 900.
- one or more codebook configuration parameters corresponding to a block diagonal structure can be received from an eNB.
- one or more codewords can be generated based on the codebook configuration parameters.
- channel measurements can be performed based on the received reference signals.
- a best codeword of the one or more codewords can be selected based at least in part on the channel measurements.
- an index of the best codeword can be reported to the eNB along with other CSI information.
- method 900 can include one or more other acts described herein in connection with system 500.
- FIG. 10 illustrated is a flow diagram of an example method 1 000 employable at a BS that facilitates generation of non-coherent transmissions based on a block diagonal codebook, according to various aspects discussed herein.
- a machine readable medium can store instructions associated with method 1000 that, when executed, can cause a BS to perform the acts of method 1000.
- one or more codebook configuration parameters corresponding to a block diagonal structure can be transmitted to a UE.
- a set of reference signals (e.g., CSI-RS) can be transmitted to the UE.
- a report can be received from the UE indicating CSI information and a best codeword of a codebook based on the codebook configuration parameters.
- method 1000 can include one or more other acts described herein in connection with system 600.
- Examples herein can include subject matter such as a method, means for performing acts or blocks of the method, at least one machine-readable medium including executable instructions that, when performed by a machine (e.g., a processor with memory, an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), or the like) cause the machine to perform acts of the method or of an apparatus or system for concurrent communication using multiple communication technologies according to embodiments and examples described.
- a machine e.g., a processor with memory, an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), or the like
- Example 1 is an apparatus configured to be employed in a User Equipment (UE), comprising: a memory interface; and processing circuitry configured to: process higher layer signaling that indicates one or more codebook configuration parameters associated with a block diagonal codebook structure comprising two or more diagonal blocks; generate one or more codewords based on the one or more codebook configuration parameters; perform channel measurements on a set of reference signals; select a best codeword of the one or more codewords based on the channel
- UE User Equipment
- Example 2 comprises the subject matter of any variation of any of example(s) 1 , wherein each diagonal block of the two or more diagonal blocks is associated with a distinct set of antenna ports.
- Example 3 comprises the subject matter of any variation of any of example(s) 1 -2, wherein each diagonal block of the two or more diagonal blocks is a product of an associated first matrix with an associated second matrix, wherein the associated first matrix determines a set of beams associated with that diagonal block, and wherein the associated second matrix applies beam selection and polarization co-phasing for the set of beams associated with that diagonal block.
- Example 4 comprises the subject matter of any variation of any of example(s) 3, wherein the associated second matrix for each diagonal block of the two or more diagonal blocks is a distinct associated second matrix for that diagonal block.
- Example 5 comprises the subject matter of any variation of any of example(s) 3, wherein the associated second matrix for each diagonal block of the two or more diagonal blocks is a common associated second matrix for each diagonal block of the two or more diagonal blocks.
- Example 6 comprises the subject matter of any variation of any of example(s) 3, wherein, for each diagonal block of the two or more diagonal blocks, each column of the associated first matrix corresponds to an oversampled DFT (Discrete Fourier Transform) vector.
- DFT Discrete Fourier Transform
- Example 7 comprises the subject matter of any variation of any of example(s) 1 -2, wherein the one or more codebook configuration parameters comprise a number of diagonal blocks of the two or more diagonal blocks.
- Example 8 comprises the subject matter of any variation of any of example(s) 1 -2, wherein the one or more codebook configuration parameters comprise a number of antenna ports associated with each block of the two or more diagonal blocks.
- Example 9 comprises the subject matter of any variation of any of example(s) 8, wherein the one or more codebook configuration parameters comprise a DFT (Discrete Fourier Transform) oversampling for each block of the two or more blocks.
- DFT Discrete Fourier Transform
- Example 10 comprises the subject matter of any variation of any of example(s) 1 -2, wherein the set of reference signals comprises a set of CSI (Channel State lnformation)-RS (Reference Signals).
- the set of reference signals comprises a set of CSI (Channel State lnformation)-RS (Reference Signals).
- Example 1 1 comprises the subject matter of any variation of any of example(s) 10, wherein the set of CSI-RS comprise two or more subsets of CSI-RS, wherein a number of CSI-RS APs (Antenna Ports) for each subset of the two or more subsets of CSI-RS corresponds to a number of APs of an associated diagonal block of the two or more diagonal blocks.
- the set of CSI-RS comprise two or more subsets of CSI-RS, wherein a number of CSI-RS APs (Antenna Ports) for each subset of the two or more subsets of CSI-RS corresponds to a number of APs of an associated diagonal block of the two or more diagonal blocks.
- Example 12 comprises the subject matter of any variation of any of example(s) 10, wherein the set of CSI-RS comprises two or more distinct CSI-RS resource configurations.
- Example 13 comprises the subject matter of any variation of any of example(s) 12, wherein the CSI-RS APs are non-QCL-ed (Quasi Co-Located) with respect to a timing offset, a delay spread, a frequency offset, and a gain.
- Example 14 comprises the subject matter of any variation of any of example(s) 12, wherein, for each subset of CSI-RS of the two or more subsets of CSI- RS, each CSI-RS AP of that subset of CSI-RS is QCL-ed (Quasi Co-Located) with CSI- RS APs of that subset of CSI-RS and non-QCL-ed with other CSI-RS APs, with respect to a timing offset, a delay spread, a frequency offset, and a gain.
- Example 15 comprises the subject matter of any variation of any of example(s) 3-5, wherein, for each diagonal block of the two or more diagonal blocks, each column of the associated first matrix corresponds to an oversampled DFT
- Example 16 comprises the subject matter of any variation of any of example(s) 1 -6, wherein the one or more codebook configuration parameters comprise a number of diagonal blocks of the two or more diagonal blocks.
- Example 17 comprises the subject matter of any variation of any of example(s) 1 -7, wherein the one or more codebook configuration parameters comprise a number of antenna ports associated with each block of the two or more diagonal blocks.
- Example 18 comprises the subject matter of any variation of any of example(s) 1 -9, wherein the set of reference signals comprises a set of CSI (Channel State lnformation)-RS (Reference Signals).
- Example 19 comprises the subject matter of any variation of any of example(s) 10-1 1 , wherein the set of CSI-RS comprises two or more distinct CSI-RS resource configurations.
- Example 20 is an apparatus configured to be employed in an Evolved NodeB (eNB), comprising: a memory interface; and processing circuitry configured to: generate higher layer signaling indicating one or more codebook configuration parameters associated with a block diagonal codebook structure comprising two or more diagonal blocks; generate a set of reference signals; process a report based on the set of reference signals, wherein the report indicates an index of a best codeword associated with the block diagonal codebook structure; and send the one or more codebook configuration parameters to a memory via the memory interface.
- eNB Evolved NodeB
- Example 21 comprises the subject matter of any variation of any of example(s) 20, wherein each diagonal block of the two or more diagonal blocks is associated with a distinct set of antenna ports.
- Example 22 comprises the subject matter of any variation of any of example(s) 20-21 , wherein each diagonal block of the two or more diagonal blocks is a product of an associated W1 matrix that determines a subset of beams associated with that diagonal block with an associated W2 matrix that applies beam selection and co- phasing for that diagonal block.
- Example 23 comprises the subject matter of any variation of any of example(s) 22, wherein, for each diagonal block of the two or more diagonal blocks, the associated W2 matrix is a common W2 matrix.
- Example 24 comprises the subject matter of any variation of any of example(s) 22, wherein, for each diagonal block of the two or more diagonal blocks, the associated W2 matrix is a distinct associated W2 matrix for that diagonal block.
- Example 25 comprises the subject matter of any variation of any of example(s) 22, wherein, for each diagonal block of the two or more diagonal blocks, the associated W1 matrix is a Kronecker product of one or more DFT (Discrete Fourier Transform) vectors.
- DFT Discrete Fourier Transform
- Example 26 comprises the subject matter of any variation of any of example(s) 20-21 , wherein the one or more codebook configuration parameters comprise a number of diagonal blocks of the two or more diagonal blocks.
- Example 27 comprises the subject matter of any variation of any of example(s) 20-21 , wherein the one or more codebook configuration parameters comprise a number of antenna ports associated with each block of the two or more diagonal blocks.
- Example 28 comprises the subject matter of any variation of any of example(s) 27, wherein the one or more codebook configuration parameters comprise a DFT (Discrete Fourier Transform) oversampling for each block of the two or more blocks.
- DFT Discrete Fourier Transform
- Example 29 comprises the subject matter of any variation of any of example(s) 20-21 , wherein the set of reference signals correspond to at least a subset of a set of CSI (Channel State lnformation)-RS (Reference Signals).
- CSI Channel State lnformation
- RS Reference Signals
- Example 30 comprises the subject matter of any variation of any of example(s) 29, wherein the set of CSI-RS comprise two or more subsets of CSI-RS, wherein a number of CSI-RS APs (Antenna Ports) for each subset of the two or more subsets of CSI-RS corresponds to a number of APs of an associated diagonal block of the two or more diagonal blocks.
- the set of CSI-RS comprise two or more subsets of CSI-RS, wherein a number of CSI-RS APs (Antenna Ports) for each subset of the two or more subsets of CSI-RS corresponds to a number of APs of an associated diagonal block of the two or more diagonal blocks.
- Example 31 is a machine readable medium comprising instructions that, when executed, cause a User Equipment to: receive higher layer signaling indicating one or more codebook configuration parameters associated with a block diagonal codebook structure comprising two or more diagonal blocks; generate one or more codewords based on the one or more codebook configuration parameters; receive a set of reference signals; perform channel measurements on the set of reference signals; select a best codeword of the one or more codewords based on the channel measurements; generate a report comprising an index of the best codeword; and transmit the report to an eNB (Evolved Node B).
- eNB evolved Node B
- Example 32 comprises the subject matter of any variation of any of example(s) 31 , wherein each diagonal block of the two or more diagonal blocks is a product of an associated first matrix with an associated second matrix, wherein the associated first matrix determines a set of beams associated with that diagonal block, and wherein the associated second matrix applies beam selection and polarization co- phasing for the set of beams associated with that diagonal block.
- Example 33 comprises the subject matter of any variation of any of example(s) 32, wherein the associated second matrix for each diagonal block of the two or more diagonal blocks is a distinct associated second matrix for that diagonal block.
- Example 34 comprises the subject matter of any variation of any of example(s) 32, wherein the associated second matrix for each diagonal block of the two or more diagonal blocks is a common associated second matrix for each diagonal block of the two or more diagonal blocks.
- Example 35 is an apparatus configured to be employed in a User Equipment (UE), comprising: means for receiving higher layer signaling indicating one or more codebook configuration parameters associated with a block diagonal codebook structure comprising two or more diagonal blocks; means for generating one or more codewords based on the one or more codebook configuration parameters; means for receiving a set of reference signals; means for performing channel measurements on the set of reference signals; means for selecting a best codeword of the one or more codewords based on the channel measurements; means for generating a report comprising an index of the best codeword; and means for transmitting the report to an eNB (Evolved Node B).
- UE User Equipment
- Example 36 comprises the subject matter of any variation of any of example(s) 35, wherein each diagonal block of the two or more diagonal blocks is a product of an associated first matrix with an associated second matrix, wherein the associated first matrix determines a set of beams associated with that diagonal block, and wherein the associated second matrix applies beam selection and polarization co- phasing for the set of beams associated with that diagonal block.
- Example 37 comprises the subject matter of any variation of any of example(s) 36, wherein the associated second matrix for each diagonal block of the two or more diagonal blocks is a distinct associated second matrix for that diagonal block.
- Example 38 comprises the subject matter of any variation of any of example(s) 36, wherein the associated second matrix for each diagonal block of the two or more diagonal blocks is a common associated second matrix for each diagonal block of the two or more diagonal blocks.
- Example 39 comprises an apparatus comprising means for executing any of the described operations of examples 1 -38.
- Example 40 comprises a machine readable medium that stores instructions for execution by a processor to perform any of the described operations of examples 1 - 38.
- Example 41 comprises an apparatus comprising: a memory interface; and processing circuitry configured to: performing any of the described operations of examples 1 -38.
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US201662339673P | 2016-05-20 | 2016-05-20 | |
PCT/US2017/033554 WO2017201414A1 (en) | 2016-05-20 | 2017-05-19 | Codebook to support non-coherent transmission in comp (coordinated multi-point) and nr (new radio) |
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