Techniques for beam-specific phase adjustment in non-collocated dual-polarized antenna arrays

Abstract

Aspects described herein relate to: receiving, from a device, a first reference signal transmitted using a first set of antenna elements on a first polarization; receiving, from the device, a second reference signal transmitted using a second set of antenna elements on a second polarization; determining, based on the first reference signal and the second reference signal, an inter-polarization phase adjustment to be applied to signals transmitted from the first set of antenna elements or the second set of antenna elements; and transmitting, to the device, an indication of the inter-polarization phase adjustment.

Description

Technical Field

[0001] The various aspects of this disclosure generally relate to wireless communication systems, and more particularly to performing phase adjustment for antenna arrays in wireless communication. Background Technology

[0002] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, message sending and receiving, and broadcasting. These systems can be multiple access systems capable of supporting communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multiple access systems include Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, and Single Carrier Frequency Division Multiple Access (SC-FDMA) systems.

[0003] These multiple access technologies have been adopted in various telecommunications standards to provide a common protocol enabling different wireless devices to communicate at the city, national, regional, and even global levels. For example, fifth-generation (5G) wireless communication technology (which may be referred to as 5G New Radio (5G NR)) is designed to expand and support a diverse range of use cases and applications relative to current mobile network generations. In one aspect, 5G communication technologies can include: enhanced mobile broadband for human-centric use cases for accessing multimedia content, services, and data; ultra-reliable low latency communication (URLLC) with certain specifications regarding latency and reliability; and massive machine-type communication, which can allow a very large number of connected devices and transmit a relatively small amount of non-latency-sensitive information.

[0004] In some wireless communication technologies, devices such as base stations may be equipped with large antenna arrays with non-co-located dual-polarized antenna elements to provide high signal gain when communicating with other devices such as multiple user equipment (UEs). Summary of the Invention

[0005] The following provides a brief overview of one or more aspects to offer a basic understanding of such aspects. This overview is not an exhaustive summary of all conceived aspects, nor is it intended to identify the key or decisive elements of all aspects, nor to define the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as an introduction to the more detailed description that follows.

[0006] According to one aspect, a method for wireless communication by a first device is provided. The method includes: receiving from a second device a first reference signal transmitted using a first set of antenna elements on a first polarization; receiving from the second device a second reference signal transmitted using a second set of antenna elements on a second polarization; determining, based on the first and second reference signals, an inter-polarization phase adjustment to be applied to the signal transmitted from the first or second set of antenna elements; and transmitting an instruction to the second device regarding the inter-polarization phase adjustment.

[0007] According to another aspect, a method for wireless communication at a first device is provided. The method includes: transmitting a first reference signal to a second device using a first set of antenna elements of the first device in a first polarization; transmitting a second reference signal to the second device using a second set of antenna elements of the first device in a second polarization; receiving an instruction for inter-polarization phase adjustment from the second device; and applying the inter-polarization phase adjustment to at least one of the first set of antenna elements or the second set of antenna elements for communication with the second device.

[0008] In another example, an apparatus for wireless communication is provided, comprising a transceiver, a memory configured to store instructions, and one or more processors communicatively coupled to the memory and the transceiver. The one or more processors are configured to: receive from the device a first reference signal transmitted using a first set of antenna elements on a first polarization; receive from the device a second reference signal transmitted using a second set of antenna elements on a second polarization; determine, based on the first and second reference signals, an inter-polarization phase adjustment to be applied to the signal transmitted from the first or second set of antenna elements; and transmit an instruction to the device regarding the inter-polarization phase adjustment.

[0009] In a further example, an apparatus for wireless communication is provided, the apparatus including a transceiver, a memory configured to store instructions, and one or more processors communicatively coupled to the memory and the transceiver. The one or more processors are configured to: transmit a first reference signal to a device using a first set of antenna elements on a first polarization; transmit a second reference signal to the device using a second set of antenna elements on a second polarization; receive an instruction for inter-polarization phase adjustment from the device; and apply the inter-polarization phase adjustment to at least one of the first set of antenna elements or the second set of antenna elements for communication with the device.

[0010] To achieve the foregoing and related objectives, these one or more aspects include the features fully described below and specifically pointed out in the claims. Certain illustrative features of these one or more aspects are set forth in detail in the following description and drawings. However, these features merely indicate a few of the various ways in which the principles of these various aspects may be employed, and this description is intended to cover all such aspects and their equivalents. Attached Figure Description

[0011] The disclosed aspects will now be described in conjunction with the accompanying drawings, which are provided for illustrative purposes and not for limiting the scope of the disclosure, wherein similar reference numerals denote similar elements, and wherein:

[0012] Figure 1 Examples of wireless communication systems according to various aspects of this disclosure are explained;

[0013] Figure 2 This is a block diagram illustrating examples of UEs according to various aspects of this disclosure;

[0014] Figure 3 This is a block diagram illustrating examples of base stations according to various aspects of this disclosure;

[0015] Figure 4 This is a flowchart illustrating an example of a method for determining and reporting inter-polarity phase adjustment to be applied to signals transmitted from different antenna elements in a non-co-located dual-polarized antenna array, based on the aspects described herein;

[0016] Figure 5 Examples of systems for performing wireless communication using a co-located dual-polarized antenna array, based on the aspects described in this article, are explained;

[0017] Figure 6 Examples of systems for performing wireless communication using non-co-located dual-polarized antenna arrays are explained according to the aspects described in this article;

[0018] Figure 7 A flowchart illustrating an example of a method for receiving inter-polarity phase adjustment and applying the inter-polarity phase adjustment to a signal transmitted by multiple antenna elements, according to various aspects described herein; and

[0019] Figure 8 This is a block diagram illustrating an example of a MIMO communication system including a base station and a UE according to various aspects of this disclosure. Detailed Implementation

[0020] The various aspects will now be described with reference to the accompanying drawings. In the following description, numerous specific details are set forth for illustrative purposes to provide a thorough understanding of one or more aspects. However, it will be apparent that such aspects can be practiced without these specific details.

[0021] The described features generally involve performing phase adjustment for certain antenna elements in a non-co-polarized antenna array. In some wireless communication technologies, such as fifth-generation (5G) New Radio (NR), base stations may typically have co-polarized dual-polarized antenna arrays, which can include arrays of dual-polarized patch antenna elements with uniform or non-uniform spacing between the elements (such as one or more 32x4 matrix antenna elements). Such antenna arrays can achieve enhanced polarization multiple-input multiple-output (MIMO) gain, which can be used for second-wave millimeter-wave deployments in frequency range 2 (FR2) defined in 5G NR, and can be used in FR4 (e.g., 52.6–114.25 GHz) and higher frequency ranges. With the use of more antenna elements, feed line crossings become more complex or difficult to avoid. For example, hardware design becomes more difficult, impedance matching becomes more challenging, and antenna efficiency decreases. One possible solution is to use non-co-polarization to avoid feed line crossings.

[0022] For example, some advantages of non-co-located arrays compared to co-located arrays may include better thermal management due to the different antenna elements, easier design because feed line crossings are minimized (especially important for large antenna arrays), and less correlation (e.g., less coupling across antenna layers), which can allow for non-polarized / spatial multiple-input multiple-output (MIMO) gain. Some disadvantages of non-co-located arrays compared to co-located arrays may include: non-co-located arrays may occupy more area and therefore consume more printed circuit board (PCB) material; radiation testing in the chamber (such as for compliance and regulatory purposes) may be difficult for non-co-located arrays due to the different antenna array centers; depending on the array size, non-co-located arrays may be excited differently by the same / different clusters in the channel, which may lead to some reduction in polarization MIMO gain; co-located arrays may be better suited for co-phase signals across two polarizations (e.g., rank-one operation); and for smaller / medium-sized arrays, the imbalance between layers due to ground planes and housings may be higher for non-co-located arrays.

[0023] Due to the various advantages and disadvantages of each antenna configuration, base stations (or other equipment, such as client equipment (CPE), user equipment (UE), etc.) can be configured with one or more of a co-located dual-polarized antenna array or a non-co-located dual-polarized antenna array. For a non-co-located dual-polarized antenna array, signals transmitted from different polarizations located on different physical antenna panels can exhibit different beam angles relative to the receiving equipment or from reflectors of their reflected beams. Thus, in rank-one communication where two antennas are transmitting the same signal using beams with different steering angles, the relative phase of the received signals can be shifted when received by the receiving equipment.

[0024] Therefore, in the aspects described herein, a device with a non-co-located dual-polarized antenna array can apply beam-dependent phase adjustment to signals transmitted by antenna elements of the non-co-located dual-polarized antenna array located on different panels to mitigate the geometric differences in orientation between the two polarized antenna arrays in rank-one communication. In one example, the transmitting device can transmit reference signals from each of the two polarized antenna arrays, and the receiving device can receive these reference signals and determine the relative phase difference between the reference signals (also referred to herein as "inter-polarization phase adjustment"). The receiving device can report this phase difference to the transmitting device, which can apply it when transmitting signals from the two polarized antenna arrays in rank-one communication. This allows the receiving device to receive rank-one communication without compensating for the phase difference in rank-one communication, which can improve the rate and / or reliability of rank-one communication in a non-co-located dual-polarized antenna array configuration.

[0025] The following will be referenced Figure 1-8 To present the described features in more detail.

[0026] As used herein, the terms “component,” “module,” “system,” and similar terms are intended to include computer-related entities such as, but not limited to, hardware, firmware, combinations of hardware and software, software, or software in execution. For example, a component can be, but is not limited to, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and / or a computer. For illustration, both an application running on a computing device and the computing device itself can be components. One or more components may reside within a process and / or a thread of execution, and components may be localized on a single computer and / or distributed across two or more computers. Furthermore, these components can be executed from various computer-readable media on which various data structures are stored. These components can communicate by means of local and / or remote processes, such as by means of signals having one or more data packets, such as data from a component interacting with a local system, another component in a distributed system, and / or interacting with other systems across a network such as the Internet.

[0027] The technologies described herein can be used in various wireless communication systems, such as CDMA, TDMA, FDMA, OFDMA, SC-FDMA, and others. The terms "system" and "network" are generally used interchangeably. CDMA systems can implement radio technologies such as CDMA2000 and Universal Terrestrial Radio Access (UTRA). CDMA2000 encompasses the IS-2000, IS-95, and IS-856 standards. IS-2000 versions 0 and A are commonly referred to as CDMA2000 1X, 1X, etc. IS-856 (TIA-856) is commonly referred to as CDMA2000 1xEV-DO, High Rate Packet Data (HRPD), etc. UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA. TDMA systems can implement radio technologies such as Global System for Mobile Communications (GSM). OFDMA systems can implement radio technologies such as Ultra Mobile Broadband (UMB), Evolved UTRA (E-UTRA), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, and Flash-OFDM™. UTRA and E-UTRA are part of the Universal Mobile Telecommunications System (UMTS). 3GPP Long Term Evolution (LTE) and LTE Advanced (LTE-A) are newer UMTS versions using E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in documents from an organization called the 3rd Generation Partnership Project (3GPP). CDMA2000 and UMB are described in documents from an organization called the 3rd Generation Partnership Project 2 (3GPP2). The technologies described herein can be used with the systems and radio technologies mentioned above, as well as with other systems and radio technologies, including cellular communications (e.g., LTE) sharing RF bands. However, the following description describes LTE / LTE-A systems for illustrative purposes, and the term LTE is used in most of the following description, but these technologies can also be applied to applications other than LTE / LTE-A (e.g., to fifth-generation (5G) new radio (NR) networks or other next-generation communication systems).

[0028] The following description provides examples and is not intended to limit the scope, applicability, or examples set forth in the claims. Changes may be made to the function and arrangement of the elements discussed without departing from the scope of this disclosure. Various procedures or components may be appropriately omitted, substituted, or added to the examples. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Furthermore, features described with reference to some examples may be combined in other examples.

[0029] Various aspects or features will be presented in the form of systems that may include several devices, components, modules, and the like. It should be understood and appreciated that various systems may include additional devices, components, modules, etc., and / or may not include all the devices, components, modules, etc. discussed in conjunction with the accompanying drawings. Combinations of these approaches may also be used.

[0030] Figure 1 This is a diagram illustrating an example of a wireless communication system and access network 100. The wireless communication system (also referred to as a wireless wide area network (WWAN)) may include base station 102, UE 104, evolved packet core (EPC) 160, and / or 5G core (5GC) 190. Base station 102 may include macrocells (high-power cellular base stations) and / or small cells (low-power cellular base stations). Macrocells may include base stations. Small cells may include femtocells, picocells, and microcells. In one example, base station 102 may also include gNB 180, as further described herein. In one example, according to aspects described herein, some nodes of the wireless communication system may have modem 240 and communication component 242 for determining an indication of inter-polarization phase adjustment or reporting such indication to another device, such as base station 102. Additionally, according to aspects described herein, some nodes may have modem 340 and communication component 342 for applying inter-polarization phase adjustment to antenna elements in a non-co-located dual-polarized antenna array. Although UE 104 is shown as having modem 240 and communication component 242, and base station 102 / gNB 180 is shown as having modem 340 and communication component 342, this is an illustrative example, and essentially any node or node type may include modem 240 and communication component 242 and / or modem 340 and communication component 342 to provide the corresponding functionality described herein.

[0031] Base station 102 configured for 4G LTE (which may be collectively referred to as Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN)) can interface with EPC 160 via backhaul link 132 (e.g., using the S1 interface). Base station 102 configured for 5G NR (which may be collectively referred to as Next Generation RAN (NG-RAN)) can interface with 5GC 190 via backhaul link 184. Among other functions, base station 102 may also perform one or more of the following functions: user data delivery, radio channel cryptography and cryptography decoding, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity), inter-cell interference coordination, connection establishment and release, load balancing, distribution of Non-Access Stratum (NAS) messages, NAS node selection, synchronization, Radio Access Network (RAN) sharing, Multimedia Broadcast Multicast Service (MBMS), subscriber and equipment tracking, RAN Information Management (RIM), paging, location, and delivery of alarm messages. Base stations 102 can communicate directly or indirectly (e.g., via EPC 160 or 5GC 190) on backhaul link 134 (e.g., using an X2 interface). Backhaul link 134 can be wired or wireless.

[0032] Base station 102 can wirelessly communicate with one or more UEs 104. Each base station 102 can provide communication coverage for its respective geographical coverage area 110. Overlapping geographical coverage areas 110 may exist. For example, a small cell 102' may have a coverage area 110' that overlaps with the coverage areas 110 of one or more macro base stations 102. A network that includes both small cells and macro cells may be referred to as a heterogeneous network. The heterogeneous network may also include a Home Evolved B Node (eNB) (HeNB), which can provide services to a restricted group (which may be referred to as a Closed Subscriber Group (CSG)). The communication link 120 between base station 102 and UE 104 may include uplink (UL) (also referred to as reverse link) transmission from UE 104 to base station 102 and / or downlink (DL) (also referred to as forward link) transmission from base station 102 to UE 104. The communication link 120 may use multiple-input multiple-output (MIMO) antenna technologies, including spatial multiplexing, beamforming, and / or transmit diversity. These communication links may use one or more carriers. For each carrier allocated in a total of up to Yx MHz (e.g., for x component carriers) used for transmission in the DL and / or UL directions, base station 102 / UE 104 may use a spectrum with a bandwidth of up to Y MHz (e.g., 5, 10, 15, 20, 100, 400 MHz, etc.). These carriers may or may not be adjacent to each other. Carrier allocation may be asymmetric with respect to DL and UL (e.g., more or fewer carriers may be allocated to DL compared to UL). Component carriers may include primary component carriers and one or more secondary component carriers. The primary component carrier may be referred to as the primary cell (PCell), and the secondary component carriers may be referred to as secondary cells (SCells).

[0033] In another example, some UEs 104 may communicate with each other using a device-to-device (D2D) communication link 158. The D2D communication link 158 may use DL / UL WWAN spectrum. The D2D communication link 158 may use one or more sidelink channels, such as the Physical Sidelink Broadcast Channel (PSBCH), Physical Sidelink Discovery Channel (PSDCH), Physical Sidelink Shared Channel (PSSCH), and Physical Sidelink Control Channel (PSCCH). D2D communication can be achieved through a wide variety of wireless D2D communication systems, such as, for example, FlashLinQ, WiMedia, Bluetooth, ZigBee, Wi-Fi based on the IEEE 802.11 standard, LTE, or NR.

[0034] The wireless communication system may further include a Wi-Fi access point (AP) 150 communicating with a Wi-Fi station (STA) 152 via a communication link 154 in the 5 GHz unlicensed spectrum. When communicating in the unlicensed spectrum, the STA 152 / AP 150 may perform a clear channel assessment (CCA) before communication to determine whether the channel is available.

[0035] Small cell 102' can operate in licensed and / or unlicensed spectrum. When operating in unlicensed spectrum, small cell 102' can employ NR and use the same 5 GHz unlicensed spectrum as that used by Wi-Fi AP 150. Small cell 102' employing NR in unlicensed spectrum can enhance access network coverage and / or increase access network capacity.

[0036] Whether it is a small cell 102' or a large cell (e.g., a macro base station), base station 102 may include an eNB, a gB node (gNB), or other types of base stations. Some base stations (such as gNB 180) may operate in conventional sub-6 GHz spectrum, millimeter wave (mmW) frequencies, and / or near-mmW frequencies to communicate with UE 104. When gNB 180 operates in mmW or near-mmW frequencies, gNB 180 may be referred to as an mmW base station. Extremely high frequency (EHF) is a portion of the electromagnetic spectrum that contains radio frequency (RF). EHF has a range of 30 GHz to 300 GHz and wavelengths between 1 mm and 10 mm. Radio waves in this band may be referred to as millimeter waves. Near-mmW extends down to 3 GHz frequencies with a wavelength of 100 mm. Ultra-high frequency (SHF) bands extend between 3 GHz and 30 GHz, and are also referred to as centimeter waves. Communication using mmW / near-mmW radio frequency bands has extremely high path loss and short range. mmW base station 180 can utilize beamforming 182 with UE 104 to compensate for extremely high path loss and short range. Base station 102 as referred to herein may include gNB 180.

[0037] EPC 160 may include Mobility Management Entity (MME) 162, other MMEs 164, Serving Gateway 166, Multimedia Broadcast Multicast Service (MBMS) Gateway 168, Broadcast Multicast Service Center (BM-SC) 170, and Packet Data Network (PDN) Gateway 172. MME 162 may communicate with Home Subscriber Server (HSS) 174. MME 162 is the control node that handles signaling between UE 104 and EPC 160. Generally, MME 162 provides bearer and connection management. All user Internet Protocol (IP) packets are delivered through Serving Gateway 166, which is itself connected to PDN Gateway 172. PDN Gateway 172 provides UE IP address allocation and other functions. PDN Gateway 172 and BM-SC 170 are connected to IP Service 176. IP Service 176 may include the Internet, intranet, IP Multimedia Subsystem (IMS), PS streaming service, and / or other IP services. The BM-SC 170 provides functionality for MBMS user service provisioning and delivery. The BM-SC 170 can serve as an entry point for content provider MBMS transmissions, authorize and initiate MBMS bearer services within a Public Land Mobile Network (PLMN), and schedule MBMS transmissions. The MBMS gateway 168 can be used to distribute MBMS traffic to base station 102 within a Broadcast-Specific Service Single Frequency Network (MBSFN) area, and can be responsible for session management (start / stop) and collecting eMBMS-related billing information.

[0038] 5GC 190 may include Access and Mobility Management Functions (AMF) 192, other AMFs 193, Session Management Functions (SMF) 194, and User Plane Functions (UPF) 195. AMF 192 may communicate with Unified Data Management (UDM) 196. AMF 192 may be a control node handling signaling between UE 104 and 5GC 190. Generally, AMF 192 provides QoS streaming and session management. User Internet Protocol (IP) packets (e.g., from one or more UEs 104) may be transmitted via UPF 195. UPF 195 provides UE IP address allocation for one or more UEs, as well as other functions. UPF 195 connects to IP service 197. IP service 197 may include the Internet, intranet, IP Multimedia Subsystem (IMS), PS streaming service, and / or other IP services.

[0039] The base station may also be referred to as gNB, B-node, evolved B-node (eNB), access point, base transceiver station, radio base station, radio transceiver, transceiver function, basic service set (BSS), extended service set (ESS), transmit / receive point (TRP), or any other suitable term. Base station 102 provides UE 104 with access to EPC 160 or 5GC 190. Examples of UE 104 include cellular phones, smartphones, Session Initiation Protocol (SIP) phones, laptop devices, personal digital assistants (PDAs), satellite radios, GPS devices, multimedia devices, video devices, digital audio players (e.g., MP3 players), cameras, game consoles, tablet devices, smart devices, wearable devices, vehicles, electricity meters, gas pumps, large or small kitchen appliances, healthcare devices, implants, sensors / actuators, displays, or any other similar functional devices. Some UE 104 devices may be referred to as IoT devices (e.g., parking timers, oil pumps, ovens, vehicles, heart monitors, etc.). IoT UEs may include Machine Type Communication (MTC) / Enhanced MTC (eMTC, also known as Category (CAT)-M, Cat M1) UEs, NB-IoT (also known as CAT NB1) UEs, and other types of UEs. In this disclosure, eMTC and NB-IoT may refer to technologies that may evolve from or be based on these technologies. For example, eMTC may include FeMTC (Further eMTC), eFeMTC (Further Enhanced eMTC), mMTC (Massively Multi-Level MTC), etc., while NB-IoT may include eNB-IoT (Enhanced NB-IoT), FeNB-IoT (Further Enhanced NB-IoT), etc. UE 104 may also be referred to as a station, mobile station, subscriber station, mobile unit, subscriber unit, radio unit, remote unit, mobile device, radio device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, radio terminal, remote terminal, handheld device, user agent, mobile client, client, or some other suitable term.

[0040] In one example, communication component 342 can transmit a reference signal from a set of different antenna elements with different polarizations at a non-co-located dual-polarized antenna array. In one example, communication component 242 can receive the reference signal and determine the inter-polarization phase difference between the reference signals. Communication component 242 can transmit an indication of the inter-polarization phase difference to communication component 342 for application to signals transmitted through the corresponding set of antenna elements. This takes into account differences in beam angles between signals transmitted on the sets of antenna elements, which may be caused by differences in the physical positions of the antenna elements on the antenna panel, and may be exacerbated by reflectors, etc. In any case, using the applied inter-polarization phase difference, communication component 342 can transmit a signal in rank communication to communication component 242, and communication component 242 can receive the rank communication as a single signal, which is transmitted as multiple different signals phase-aligned based on the inter-polarization phase difference.

[0041] Now go to Figure 2-8 The aspects are depicted with reference to one or more components and one or more methods that can perform the actions or operations described herein, wherein the aspects shown in the dashed lines may be optional. Although the following... Figure 4 and Figure 7 The operations described herein are presented in a specific order and / or performed as by the example components, but it should be understood that the order of these actions and the components performing the actions may vary depending on the implementation. Furthermore, it should be understood that the following actions, functions, and / or described components may be performed by a specially programmed processor, a processor executing specially programmed software or a computer-readable medium, or by any other combination of hardware and / or software components capable of performing the described actions or functions.

[0042] refer to Figure 2 An example of an implementation of UE 104 may include various components, some of which have been described above and are further described herein, including components such as one or more processors 212 and memory 216 communicating via one or more buses 244 and transceiver 202, which, according to the aspects described herein, may operate in conjunction with modem 240 and / or communication component 242 to determine an indication of interpolar phase adjustment or to report such indication to another device, such as base station 102.

[0043] In one aspect, one or more processors 212 may include modem 240 and / or may be part of modem 240 using one or more modem processors. Therefore, various functions associated with communication component 242 may be included in modem 240 and / or processor 212, and in one aspect, may be performed by a single processor, while in other aspects, different functions may be performed by a combination of two or more different processors. For example, in one aspect, the one or more processors 212 may include any one or any combination of: modem processor, or baseband processor, or digital signal processor, or transmitter processor, or receiver processor, or transceiver processor associated with transceiver 202. In other aspects, some features of the features of one or more processors 212 and / or modem 240 associated with communication component 242 may be performed by transceiver 202.

[0044] Furthermore, memory 216 may be configured to store data used herein and / or a local version of application 275, or communication component 242 and / or one or more sub-components thereof executed by at least one processor 212. Memory 216 may include any type of computer-readable medium that can be used by a computer or at least one processor 212, such as random access memory (RAM), read-only memory (ROM), tape, magnetic disk, optical disk, volatile memory, non-volatile memory, and any combination thereof. In one aspect, for example, when UE 104 is operating at least one processor 212 to execute communication component 242 and / or one or more sub-components thereof, memory 216 may be a non-transient computer-readable storage medium storing one or more computer-executable codes defining communication component 242 and / or one or more sub-components thereof and / or data associated therewith.

[0045] Transceiver 202 may include at least one receiver 206 and at least one transmitter 208. Receiver 206 may include hardware, firmware, and / or processor-executable software code for receiving data, the code including instructions and stored in memory (e.g., a computer-readable medium). Receiver 206 may be, for example, a radio frequency (RF) receiver. In one aspect, receiver 206 may receive signals transmitted by at least one base station 102. Additionally, receiver 206 may process such received signals and may also obtain measurements of the signals, such as, but not limited to, Ec / Io, signal-to-noise ratio (SNR), reference signal received power (RSRP), received signal strength indicator (RSSI), etc. Transmitter 208 may include processor-executable hardware, firmware, and / or software code for transmitting data, the code including instructions and stored in memory (e.g., a computer-readable medium). Suitable examples of transmitter 208 may include, but are not limited to, RF transmitters.

[0046] Furthermore, in one aspect, UE 104 may include an RF front-end 288, which is communicatively operable with one or more antennas 265 and transceiver 202 for receiving and transmitting radio transmissions, such as wireless communications transmitted by at least one base station 102 or wireless transmissions transmitted by UE 104. The RF front-end 288 may be connected to one or more antennas 265 and may include one or more low-noise amplifiers (LNAs) 290, one or more switches 292, one or more power amplifiers (PAs) 298, and one or more filters 296 for transmitting and receiving RF signals.

[0047] On one hand, the LNA 290 can amplify the received signal to a desired output level. On another hand, each LNA 290 can have specified minimum and maximum gain values. On yet another hand, the RF front end 288 can use one or more switches 292 to select a particular LNA 290 and its specified gain value based on the desired gain value for a particular application.

[0048] Furthermore, for example, one or more PAs 298 may be used by the RF front end 288 to amplify the signal to obtain an RF output at a desired output power level. In one aspect, each PA 298 may have specified minimum and maximum gain values. In another aspect, the RF front end 288 may use one or more switches 292 to select a particular PA 298 and its specified gain value based on the desired gain value for a particular application.

[0049] Additionally, for example, one or more filters 296 may be used by the RF front end 288 to filter the received signal to obtain the input RF signal. Similarly, in one aspect, for example, a corresponding filter 296 may be used to filter the output from a corresponding PA 298 to produce an output signal for transmission. In one aspect, each filter 296 may be connected to a specific LNA 290 and / or PA 298. In one aspect, the RF front end 288 may use one or more switches 292 to select the transmit or receive path using a specified filter 296, LNA 290, and / or PA 298 based on a configuration as specified by the transceiver 202 and / or processor 212.

[0050] Thus, transceiver 202 can be configured to transmit and receive wireless signals via RF front-end 288 through one or more antennas 265. In one aspect, the transceiver can be tuned to operate at a specified frequency so that UE 104 can, for example, communicate with one or more base stations 102 or one or more cells associated with one or more base stations 102. In another aspect, for example, modem 240 can configure transceiver 202 to operate at a specified frequency and power level based on the UE configuration of UE 104 and the communication protocol used by modem 240.

[0051] In one aspect, modem 240 may be a multi-band, multi-mode modem capable of processing digital data and communicating with transceiver 202 to enable the use of transceiver 202 to transmit and receive digital data. In another aspect, modem 240 may be multi-band and configured to support multiple frequency bands for a specific communication protocol. In another aspect, modem 240 may be multi-mode and configured to support multiple operating networks and communication protocols. In one aspect, modem 240 may control one or more components of UE 104 (e.g., RF front-end 288, transceiver 202) to transmit and / or receive signals from the network based on a specified modem configuration. In one aspect, the modem configuration may be based on the modem's mode and the frequency band used. In another aspect, the modem configuration may be based on UE configuration information associated with UE 104, such as information provided by the network during cell selection and / or cell reselection.

[0052] On one hand, the communication component 242 may optionally include an adjustment indication component 252 for indicating an inter-polarity phase adjustment to be applied by the device (e.g., base station 102) to the antenna element set, and / or a rank indication component 254 for reporting a rank switch to the device.

[0053] On one hand, processors 212 may correspond to the combination of Figure 8 The UE describes one or more of the processors. Similarly, memory 216 may correspond to the combination of Figure 8 The memory described by the UE in the text.

[0054] Reference Figure 3 According to the aspects described herein, an example of an implementation of base station 102 (e.g., base station 102 and / or gNB 180, as described above) may include various components, some of which have already been described above, but also include components such as one or more processors 312 and memory 316 communicating via one or more buses 344 and transceiver 302, which may operate in conjunction with modem 340 and communication component 342 to apply inter-polarization phase adjustment to antenna elements in a non-co-located dual-polarized antenna array.

[0055] Transceiver 302, receiver 306, transmitter 308, one or more processors 312, memory 316, application 375, bus 344, RF front end 388, LNA 390, switch 392, filter 396, PA 398 and one or more antennas 365 may be the same as or similar to the corresponding components of UE 104 as described above, but are configured or otherwise programmed for base station operation rather than UE operation.

[0056] In one respect, according to the aspects described herein, communication component 342 may optionally include a phase adjustment component 352 for adjusting the phase of a signal transmitted to the device on one or more sets of antenna elements based on received inter-polarity phase adjustment and / or a rank determination component 354 for determining rank switching in communication with the device.

[0057] On one hand, processors 312 may correspond to the combination of Figure 8 The base station described in the text refers to one or more of the processors. Similarly, memory 316 may correspond to the combination of... Figure 8 The memory described by the base station in the text.

[0058] Figure 4 The flowchart illustrates an example of a method 400 for determining and reporting inter-polarity phase adjustment to be applied to signals transmitted from different antenna elements in a non-co-located dual-polarized antenna array, according to the aspects described herein. In one example, UE 104 can use Figure 1-2 One or more components described herein may be used to perform the functions described in method 400. In some examples, other devices (e.g., CPEs) capable of wirelessly communicating with another device using a non-co-located dual-polarized antenna array may be used. Figure 1-2 One or more components described in the method are used to perform the functions described in method 400.

[0059] In method 400, at block 402, a first reference signal transmitted using a first set of antenna elements on a first polarization can be received from the device. In one aspect, communication component 242, such as incorporating processor 212, memory 216, transceiver 202, etc., can receive the first reference signal transmitted using a first set of antenna elements on a first polarization from the device (e.g., base station 102). In one example, the first reference signal can be beamformed in a spatial direction by selectively applying power to antenna resources by the device (e.g., base station 102) to achieve spatial orientation. The first reference signal can be transmitted by base station 102 for the purpose of determining inter-polarization phase adjustment for rank-one communication.

[0060] In method 400, at block 404, a second reference signal transmitted using a second antenna array on a second polarization can be received from the device. On one hand, communication component 242, such as, in conjunction with processor 212, memory 216, transceiver 202, etc., can receive the second reference signal transmitted using a second antenna array on a second polarization from the device (e.g., base station 102). In one example, the second reference signal can be beamformed in a spatial direction (which may be similar to or different from the first reference signal) by selectively applying power to antenna resources by the device (e.g., base station 102) to achieve beamforming in that spatial direction. The second reference signal can also be transmitted by base station 102 for the purpose of determining inter-polarization phase adjustment for rank-one communication. Figure 5-6 Various examples of antenna elements and corresponding panels or arrays are shown and described.

[0061] Figure 5 An example of a system 500 for performing wireless communication using a co-located dual-polarized antenna array is described. System 500 may include a co-located dual-polarized antenna array 502 at a transmit / receive point (TRP), where the TRP may be a base station 102 or a TRP operated by the base station 102, etc. System 500 may also include a co-located dual-polarized antenna array 504 at the UE and / or a reflector 506 that reflects signals from the dual-polarized antenna array 502 to the dual-polarized antenna array 504. Reflector 506 may include stationary objects (such as buildings or other structures, trees, etc.) or moving objects (such as cars, etc.) existing in space and reflecting signals from the dual-polarized antenna array 502 to the dual-polarized antenna array 504.

[0062] The dual-polarized antenna array 502 can be a co-located dual-polarized antenna array of, for example, 32 dual-polarized antenna elements (configured in an 8x4 pattern) co-located on a single antenna panel. The TRP may include one or more such arrays. The UE may also include one or more such panels. Each dual-polarized antenna element in antenna array 502 may include two polarizations represented by each line of each "X", each X being usable for transmitting signals in orthogonal polarization. Figure 5 As shown, the dual-polarized antenna array 502 can transmit beamformed signals from a single antenna element on polarization 0 510 (commonly referred to as the common polarization component) and polarization 1 512 (commonly referred to as the cross polarization component), which may include transmitting signals along the same direction using the two polarizations of the dual-polarized antenna element. Similarly, the dual-polarized antenna array 504 of the UE can receive signals along the same direction at a single antenna element on polarization 0 514 and polarization 1 516.

[0063] Figure 6An example of a system 600 for performing wireless communication using a non-co-located dual-polarized antenna array is described. System 600 may include a non-co-located dual-polarized antenna array 602 at a transmit / receive point (TRP), where the TRP may be a base station 102 or a TRP operated by the base station 102, etc. System 600 may also include a co-located dual-polarized antenna array 504 at the UE and / or a reflector 506 that reflects signals from the non-co-located dual-polarized antenna array 602 to the co-located dual-polarized antenna array 504. Reflector 506 may include stationary objects (such as glass or metal objects in buildings or other structures, such as building corners, trees, etc.) or moving objects (such as cars, etc.) existing in space and reflecting signals from the non-co-located dual-polarized antenna array 602 to the co-located dual-polarized antenna array 504.

[0064] The dual-polarized antenna array 602 can be a non-co-located dual-polarized antenna array of 32 dual-polarized antenna elements (in a two-by-two 8x4 configuration) not co-located on two antenna panels. The TRP may include one or more such panels. Each dual-polarized antenna element in the antenna array 602 may include a single polarization from a first panel employing a first polarization and a single polarization from a second panel employing a second polarization, each of which can be used to transmit signals in different polarizations. Figure 6 As shown, the dual-polarized antenna array 602 can transmit beamformed signals from a single antenna element at 610 and another single antenna element at 612. It may include the use of different beams to transmit signals, which may have different geometric properties based on the different physical locations or positions of the antenna elements transmitting signals 610 and 612 on the antenna array. The UE's dual-polarized antenna array 504 can receive signals at individual antenna elements on polarization 0 514 and polarization 1 516. Due to the different locations or positions of the antenna elements, signals 610 and 612 may have different phases even when transmitted as the same signal in rank-1 communication. As described above and further herein, the base station 102 may transmit first and second reference signals to allow the UE 104 to determine and report inter-polarization phase adjustments, enabling the base station 102 to adjust the signals transmitted through the corresponding antenna elements.

[0065] In method 400, at block 406, the inter-polarization phase adjustment to be applied to the signal transmitted on the first antenna element set or the second antenna element set can be determined based on the first reference signal and the second reference signal. On one hand, the adjustment indication component 252, for example in conjunction with processor 212, memory 216, transceiver 202, communication component 242, etc., can determine the inter-polarization phase adjustment to be applied to the signal transmitted on the first antenna element set or the second antenna element set based on the first reference signal and the second reference signal. For example, the adjustment indication component 252 can determine the inter-polarization phase adjustment as the phase difference between the first and second reference signals received from the device.

[0066] For example, in the case of a non-co-located dual-polarized array, where the same / different beams of in-phase energy are used across two polarizations (e.g., in rank-1 communication) at the receiver (e.g., at UE 104), the receiver can benefit from beam-related phase adjustment of the signals from the two polarizations of the transmitting device (e.g., base station 102, TRP, or gNB, etc.). The determined phase adjustment can compensate for path distance differences between signals, such as the geometric differences in the orientation of the two polarized antenna arrays (at the transmitting device (e.g., base station 102) and the receiver (e.g., UE 104)) relative to reflectors or clusters in the channel. Such path distance differences can depend on the beam angles (at the transmitting device (e.g., base station 102) and the receiver (e.g., UE 104)) or also on the relative mobility direction of the reflector / cluster or the receiver (e.g., UE 104).

[0067] In method 400, at block 408, an indication for inter-polarity phase adjustment can be transmitted to the device. On one hand, an adjustment indication component 252, such as in conjunction with processor 212, memory 216, transceiver 202, communication component 242, etc., can transmit the indication for inter-polarity phase adjustment to the device (e.g., base station 102), which allows the device to apply the inter-polarity phase adjustment to in-phase signals transmitted from the corresponding antenna element to UE 104. For example, the communication component 242 can transmit the indication for inter-polarity phase adjustment in channel state feedback (e.g., in the rank indicator (RI) in channel state information (CSI) feedback), which can be transmitted on the uplink control channel or in higher-layer signaling (such as radio resource control (RRC) signaling). Additionally, for example, the indication can include, for example, an explicit value of the phase adjustment, an enumeration of approximate values ​​indicating the phase adjustment (corresponding to coarse / fine quantization of the phase shifter set), etc. In another example, adjustment indicator component 252 can indicate the phase of the received reference signal to base station 102, and base station 102 can determine the inter-polarization phase adjustment to be applied to subsequent signal transmission.

[0068] In one example, a reference signal can be received to determine the inter-polarization phase adjustment based on the rank switching to rank-1 communication. Therefore, in method 400, optionally at block 410, beam pairs can be used to communicate with the device over a dual-polarized link. On one hand, communication component 242, such as in conjunction with processor 212, memory 216, transceiver 202, etc., can use beam pairs to communicate with the device (e.g., base station 102) over a dual-polarized link. For example, communication component 242 can receive signals from base station 102 based on corresponding beams from different sets of antenna elements, wherein the different sets of antenna elements may include antenna elements using a first polarization from non-co-located antenna panels and antenna elements using a second polarization. As described above, using dual-polarized antenna elements for communication can improve spatial and diversity MIMO gain.

[0069] In method 400, optionally at block 412, a rank switch in rank communication with the device can be reported. On one hand, a rank indication component 254, such as in conjunction with processor 212, memory 216, transceiver 202, communication component 242, etc., can report a rank switch in rank communication with the device. For example, the rank indication component 254 can report a rank switch based on various determinations to improve communication quality with base station 102, such as in cases where channel metrics degrade below a threshold. Base station 102 can perform rank communication by transmitting the same signal from multiple antenna elements, which may include antenna elements with different polarizations. As described, when the antenna elements have different polarizations and are on a non-co-located panel, the beamformed signals transmitted from the multiple antenna elements may have different phases when received at UE 104. Therefore, base station 102 can transmit a reference signal to facilitate the determination and reporting of phase differences.

[0070] Additionally, in one example, in method 400, optionally at block 414, a configuration indicating different polarization transmission configurations for the first and second reference signals can be received. In one aspect, adjustment indication component 252, for example in conjunction with processor 212, memory 216, transceiver 202, communication component 242, etc., can receive a configuration indicating different polarization transmission configurations for the first and second reference signals. For example, this configuration may indicate the beam used to transmit the first and second reference signals, frequency or time resources used to transmit the first and second reference signals, resources used to indicate the inter-polarization phase difference between the first and second reference signals, etc. In one example, adjustment indication component 252 may receive the configuration based on a reported rank switching or other determination by base station 102 to request inter-polarization phase adjustment applied to signals transmitted from different antenna elements.

[0071] Alternatively, for example, method 400 may advance from block 408 to block 402 (or to one or more of blocks 410, 412, 414) to continuously receive reference signals for determining inter-polarization phase adjustment. In this regard, when the UE 104 or the reflector moves relative to the equipment (e.g., relative to base station 102) and channel conditions may change, the adjustment indication component 252 may continue to measure the reference signals and report inter-polarization phase adjustment for transmitting signals to the UE 104 from multiple antenna elements in the non-co-located dual-polarized antenna array.

[0072] Figure 7 A flowchart illustrating an example of a method 700 for receiving inter-polarity phase adjustment and applying the inter-polarity phase adjustment to a signal transmitted by multiple antenna elements, according to various aspects described herein, is provided. In one example, base station 102 can use... Figure 1 and 3 One or more components described herein may be used to perform the functions described in method 700. In some examples, any other device capable of wireless communication with a device supporting multiple antenna elements may be used. Figure 1 and 3 One or more components described in the method are used to perform the functions described in method 700.

[0073] In method 700, at block 702, a first reference signal can be transmitted to a device using a first set of antenna elements on a first polarization. In one aspect, communication component 342, such as in conjunction with processor 312, memory 316, transceiver 302, etc., can transmit the first reference signal to a device (e.g., UE 104) using the first set of antenna elements on a first polarization. In one example, the first reference signal can be beamformed in a spatial direction by selectively applying power to antenna resources by base station 102 to achieve a spatial direction of interest. The first reference signal can be transmitted by base station 102 for the purpose of allowing the device (e.g., UE 104) to determine inter-polarization phase adjustments for rank-one communication.

[0074] In method 700, at block 704, a second reference signal can be transmitted to the device using a second antenna array on a second polarization. In one aspect, communication component 342, such as in conjunction with processor 312, memory 316, transceiver 302, etc., can transmit the second reference signal to the device (e.g., UE 104) using a second antenna array on a second polarization. In one example, the second reference signal can be beamformed in a spatial direction of interest (which may be similar to or different from the first reference signal) by selectively applying power to antenna resources by base station 102. The second reference signal can also be transmitted by base station 102 for the purpose of allowing the device (e.g., UE 104) to determine inter-polarization phase adjustment for rank-one communication.

[0075] In method 700, at block 706, an indication of inter-polarity phase adjustment can be received from the device. On one hand, a phase adjustment component 352, such as in conjunction with processor 312, memory 316, transceiver 302, communication component 342, etc., can receive an indication of inter-polarity phase adjustment from the device (e.g., from UE 104), which can be used to apply to signals transmitted on a first antenna element set or a second antenna element set. For example, the phase adjustment component 352 can receive an indication of inter-polarity phase adjustment as a phase difference between a first reference signal and a second reference signal received from the device (e.g., UE 104). For example, the phase adjustment component 352 can receive the indication of inter-polarity phase adjustment in channel state feedback, which can be received on an uplink control channel or in higher-layer signaling (such as RRC signaling). Additionally, for example, the indication can include an explicit value of the phase adjustment, an enumeration of approximate values ​​indicating the phase adjustment (from which the phase adjustment component 352 can determine the phase adjustment value), etc. In another example, phase adjustment component 352 can receive the phase of a reference signal, such as that received at the device, and phase adjustment component 352 can determine the inter-polarization phase adjustment to be applied to subsequent signal transmissions.

[0076] In method 700, at block 708, inter-polarity phase adjustment can be applied to at least one of the first antenna element set or the second antenna element set for communication with the device. In one aspect, phase adjustment assembly 352, for example in conjunction with processor 312, memory 316, transceiver 302, communication assembly 342, etc., can apply inter-polarity phase adjustment to at least one of the first antenna element set or the second antenna element set for communication with the device. For example, phase adjustment assembly 352 can apply inter-polarity phase adjustment to one antenna element set to align the phase with another antenna element set that has different polarizations (or otherwise is located at different positions or locations on the antenna panel).

[0077] In one example, a reference signal can be transmitted to determine the inter-polarization phase adjustment based on the rank switching to rank-one communication. Therefore, in method 700, optionally at block 710, beam pairs can be used to communicate with the device over a dual-polarized link. On one hand, communication component 342, such as in conjunction with processor 312, memory 316, transceiver 302, etc., can use beam pairs to communicate with the device (e.g., UE 104) over a dual-polarized link. For example, communication component 342 can transmit signals to UE 104 from different sets of antenna elements based on corresponding beams, wherein the different sets of antenna elements may include antenna elements using a first polarization from non-co-located antenna panels and antenna elements using a second polarization. As described above, using dual-polarized antenna elements for communication can improve spatial and diversity MIMO gain.

[0078] In method 700, optionally at block 712, a report regarding rank switching in rank-to-rank communication with the device can be received. On one hand, rank determination component 354, such as in conjunction with processor 312, memory 316, transceiver 302, communication component 342, etc., can receive a report regarding rank switching in rank-to-rank communication with the device. Base station 102 can perform rank-to-rank communication by transmitting the same signal from a plurality of antenna element sets, which may include antenna elements with different polarizations. As described, when the antenna elements have different polarizations and are on a non-co-located panel, the beamformed signals transmitted from the plurality of antenna elements may have different phases when received at UE 104. Therefore, base station 102 can transmit a reference signal to facilitate the determination and reporting of phase differences.

[0079] Additionally, in one example, in method 700, optionally at block 714, a configuration indicating different polarization transmission configurations for the first and second reference signals can be transmitted. In one aspect, phase adjustment component 352, for example in conjunction with processor 312, memory 316, transceiver 302, communication component 342, etc., can transmit a configuration indicating different polarization transmission configurations for the first and second reference signals. For example, this configuration may indicate the beam used to transmit the first and second reference signals, frequency or time resources used to transmit the first and second reference signals, resources used to indicate the inter-polarization phase difference between the first and second reference signals, etc. In one example, phase adjustment component 352 may transmit the configuration based on receiving a report of rank switching or otherwise determining that a request is being made for inter-polarization phase adjustment applied to signals transmitted from different antenna element sets.

[0080] Alternatively, for example, method 700 may advance from block 708 to block 702 (or to one or more of blocks 710, 712, 714) to continuously receive reference signals for determining inter-polarization phase adjustment. In this regard, when the device (e.g., UE 104 or a reflector) moves relative to base station 102 and channel conditions may change, phase adjustment component 352 may continue to transmit reference signals for determining and reporting inter-polarization phase adjustment for transmitting signals to the device from multiple antenna elements in the non-co-located dual-polarized antenna array at base station 102.

[0081] In the example above, base station 102 and UE 104 establish a dual-polarized link with a certain beam pair. UE 104 can report a rank handover (to a lower rank) via the RI in the CSI feedback. When switching to rank one, base station 102 can provide a reference signal from one polarization on the base station side, allowing UE 104 to estimate the received signal and repeat the process on the base station side using a second polarization. UE 104 can report inter-polarization phase adjustments to be used for in-phase transmission across polarizations. Base station 102 can use this information to perform in-phase transmission on rank one. When the beam pair changes, the UE moves, the channel environment (e.g., reflectors) changes, etc., base station 102 and UE 104 repeat this process.

[0082] Figure 8 This is a block diagram of a MIMO communication system 800, including base station 102 and UE 104. The MIMO communication system 800 can be explained by referring to... Figure 1 The wireless communication access network 100 is described in various aspects. Base station 102 may be a reference. Figure 1 Examples of various aspects of the described base station 102 are provided. Base station 102 may be equipped with antennas 834 and 835, and UE 104 may be equipped with antennas 852 and 853. In the MIMO communication system 800, base station 102 can transmit data simultaneously on multiple communication links. Each communication link may be referred to as a "layer," and the "rank" of the communication link indicates the number of layers used for communication. For example, in a 2x2 MIMO communication system where base station 102 transmits two "layers," the rank of the communication link between base station 102 and UE 104 is 2.

[0083] At base station 102, transmit (Tx) processor 820 can receive data from a data source. Transmit processor 820 can process this data. Transmit processor 820 can also generate control symbols or reference symbols. Transmit MIMO processor 830 can perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, or reference symbols where applicable, and can provide the output symbol stream to transmit modulators / demodulators 832 and 833. Each modulator / demodulator 832 to 833 can process its respective output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator / demodulator 832 to 833 can further process (e.g., convert to analog, amplify, filter, and up-convert) the output sample stream to obtain a DL signal. In one example, the DL signal from modulators / demodulators 832 and 833 can be transmitted via antennas 834 and 835, respectively.

[0084] UE 104 can be used as a reference. Figure 1-2 Examples of various aspects of the described UE 104. At UE 104, UE antennas 852 and 853 can receive DL signals from base station 102 and can provide the received signals to modulators / demodulators 854 and 855, respectively. Each modulator / demodulator 854 to 855 can condition (e.g., filter, amplify, down-convert, and digitize) its respective received signal to obtain an input sample. Each modulator / demodulator 854 to 855 can further process the input sample (e.g., for OFDM, etc.) to obtain received symbols. MIMO detector 856 can obtain the received symbols from modulators / demodulators 854 and 855, perform MIMO detection on these received symbols where applicable, and provide detected symbols. Receive (Rx) processor 858 can process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide the decoded data to UE 104 to a data output, and provide the decoded control information to processor 880 or memory 882.

[0085] In some cases, processor 880 may execute stored instructions to instantiate communication component 242 (e.g., see...). Figure 1 and 2 ).

[0086] On the uplink (UL), at UE 104, transmit processor 864 can receive and process data from a data source. Transmit processor 864 can also generate reference symbols for a reference signal. Symbols from transmit processor 864 can be pre-encoded by transmit MIMO processor 866 where applicable, further processed by modulators / demodulators 854 and 855 (e.g., for SC-FDMA, etc.), and transmitted to base station 102 according to communication parameters received from base station 102. At base station 102, UL signals from UE 104 can be received by antennas 834 and 835, processed by modulators / demodulators 832 and 833, detected by MIMO detector 836 where applicable, and further processed by receive processor 838. Receive processor 838 can provide decoded data to data output and processor 840 or memory 842.

[0087] In some cases, processor 840 may execute stored instructions to instantiate communication component 342 (e.g., see [link]). Figure 1 and 3 ).

[0088] The components of UE 104 may be implemented individually or collectively using one or more ASICs adapted to perform some or all of the applicable functions in hardware. Each of the mentioned modules may be a means for performing one or more functions related to the operation of the MIMO communication system 800. Similarly, the components of base station 102 may be implemented individually or collectively using one or more application-specific integrated circuits (ASICs) adapted to perform some or all of the applicable functions in hardware. Each of the mentioned components may be a means for performing one or more functions related to the operation of the MIMO communication system 800.

[0089] The following aspects are merely illustrative, and their aspects can be combined with other embodiments or aspects of the teachings described herein without limitation.

[0090] Aspect 1 is a method for wireless communication at a first device, comprising: receiving from a second device a first reference signal transmitted using a first set of antenna elements on a first polarization; receiving from the second device a second reference signal transmitted using a second set of antenna elements on a second polarization; determining, based on the first and second reference signals, an inter-polarization phase adjustment to be applied to the signal transmitted from the first set of antenna elements or the second set of antenna elements; and transmitting to the second device an instruction regarding the inter-polarization phase adjustment.

[0091] In aspect 2, the method of aspect 1 includes: communicating with a second device on a dual-polarized link using a beam pair; and reporting a rank switch to rank-one communication between the first device and the second device, wherein receiving a first reference signal and a second reference signal is based on reporting the switch to the second device.

[0092] In aspect 3, the method of aspect 2 includes: receiving a configuration indicating different polarization transmission configurations of the first reference signal and the second reference signal based on reporting a rank switch to the second device.

[0093] In aspect 4, the method of aspect 3 includes: receiving a first reference signal based on a first beam indicated in the configuration, and receiving a second reference signal based on a second beam indicated in the configuration.

[0094] In aspect 5, the method of any of aspects 2 to 4 includes: wherein reporting a rank switch includes reporting the rank switch to a second device in channel state feedback.

[0095] In aspect 6, the method of any of aspects 1 to 5 includes: wherein determining the interpolar phase adjustment includes determining the phase difference between a first phase of a first reference signal and a second phase of a second reference signal.

[0096] In aspect 7, the method of any of aspects 1 to 6 includes: receiving a first reference signal includes receiving the first reference signal with a first polarization of an antenna array at the device; receiving a second reference signal includes receiving a second reference signal with a second polarization of an antenna array at the device; wherein determining the inter-polarization phase adjustment is based on determining a first phase of the first reference signal received with the first polarization of the antenna array and determining a second phase of the second reference signal received with the second polarization of the antenna array.

[0097] In aspect 8, the method of any of aspects 1 to 7 includes: wherein interpolarity phase adjustment compensates for the path distance difference between a first reference signal based on a first polarization and a second reference signal based on a second polarization.

[0098] In aspect 9, the method of aspect 8 includes: wherein the path distance difference corresponds to the beam angle difference between a first reference signal transmitted using a first set of antenna elements and a second reference signal transmitted using a second set of antenna elements.

[0099] In aspect 10, the method of aspect 9 includes: wherein the path distance difference further corresponds to the relative movement direction of at least one of the first device or reflector relative to the second device.

[0100] Aspect 11 is a method for wireless communication at a first device, comprising: transmitting a first reference signal to a second device using a first set of antenna elements of the first device in a first polarization; transmitting a second reference signal to the second device using a second set of antenna elements of the first device in a second polarization; receiving an instruction for inter-polarization phase adjustment from the second device; and applying the inter-polarization phase adjustment to at least one of the first set of antenna elements or the second set of antenna elements for communication with the second device.

[0101] In aspect 12, the method of aspect 11 includes: communicating with a second device on a dual-polarized link using a beam pair; and receiving from the second device a report on a rank switching to rank-one communication, wherein the transmission of a first reference signal and a second reference signal is based on the receipt of the report on the rank switching.

[0102] In aspect 13, the method of aspect 12 includes: transmitting a configuration indicating different polarization transmission configurations of the first reference signal and the second reference signal based on receiving a report of rank switching.

[0103] In aspect 14, the method of aspect 13 includes transmitting a first reference signal based on a first beam indicated in the configuration, and transmitting a second reference signal based on a second beam indicated in the configuration.

[0104] In aspect 15, the method of any of aspects 11 to 14 includes: wherein interpolarity phase adjustment compensates for the path distance difference between a first reference signal based on a first polarization and a second reference signal based on a second polarization.

[0105] In aspect 16, the method of aspect 15 includes: wherein the path distance difference corresponds to the beam angle difference between a first reference signal transmitted using a first set of antenna elements and a second reference signal transmitted using a second set of antenna elements.

[0106] In aspect 17, the method of aspect 16 includes: wherein the path distance difference further corresponds to the relative movement direction of at least one of the second device or reflector relative to the first device.

[0107] In aspect 18, the method of any of aspects 11 to 17 includes: based on at least one of detected beampair switching, movement of the second device, or change in channel environment parameters: transmitting a third reference signal to the second device using a first antenna element set of the first device on a first polarization; transmitting a fourth reference signal to the second device using a second antenna element set of the first device on a second polarization; receiving a second polarization phase adjustment from the second device; and applying the second polarization phase adjustment to at least one of the first antenna element set or the second antenna element set for communication with the second device.

[0108] Aspect 19 is an apparatus for wireless communication, comprising a transceiver, a memory configured to store instructions, and one or more processors communicatively coupled to the memory and the transceiver. The one or more processors are configured to: receive from the device a first reference signal transmitted using a first set of antenna elements on a first polarization; receive from the device a second reference signal transmitted using a second set of antenna elements on a second polarization; determine, based on the first and second reference signals, an inter-polarization phase adjustment to be applied to the signal transmitted from the first or second set of antenna elements; and transmit an instruction to the device regarding the inter-polarization phase adjustment.

[0109] In aspect 20, the apparatus of aspect 19 includes one or more processors further configured to: communicate with the device on a dual-polarized link using a beam pair; and report rank switching of rank communication between the apparatus and the device, wherein the one or more processors are configured to receive a first reference signal and a second reference signal based on reporting the switch to the device.

[0110] In aspect 21, the apparatus of aspect 20 includes one or more processors further configured to receive a configuration indicating different polarization transmission configurations for a first reference signal and a second reference signal based on reporting a rank switch to the apparatus.

[0111] In aspect 22, the apparatus of aspect 21 includes one or more processors configured to receive a first reference signal based on a first beam indicated in the configuration, and to receive a second reference signal based on a second beam indicated in the configuration.

[0112] In aspect 23, the apparatus of any of aspects 20 or 21 includes one or more processors configured to report the rank switch at least in part by reporting the rank switch to the device in channel state feedback.

[0113] In aspect 24, the apparatus of any of aspects 19 to 23 includes one or more processors configured to: determine inter-polarization phase adjustment at least in part by determining a phase difference between a first phase of a first reference signal and a second phase of a second reference signal.

[0114] In aspect 25, the apparatus of any of aspects 19 to 24 includes a first reference signal received at least partially by receiving a first reference signal with respect to a first polarization of an antenna element set at the device, wherein the one or more processors are configured to receive a second reference signal at least partially by receiving a second reference signal with respect to a second polarization of an antenna element set at the device, wherein the one or more processors are configured to determine an interpolarization phase adjustment based on determining a first phase of the first reference signal received with respect to the first polarization of the antenna element set and determining a second phase of the second reference signal received with respect to the second polarization of the antenna element set.

[0115] In aspect 26, the apparatus of any of aspects 19 to 25 includes: wherein interpolarity phase adjustment compensation compensates for the path distance difference between a first reference signal based on a first polarization and a second reference signal based on a second polarization.

[0116] In aspect 27, the apparatus as in aspect 26 includes: wherein the path distance difference corresponds to a beam angle difference between a first reference signal transmitted using a first set of antenna elements and a second reference signal transmitted using a second set of antenna elements.

[0117] In aspect 28, the device as described in aspect 27 includes: wherein the path distance difference further corresponds to the relative movement direction of at least one of the device or reflector relative to the device.

[0118] Aspect 29 is an apparatus for wireless communication, comprising a transceiver, a memory configured to store instructions, and one or more processors communicatively coupled to the memory and the transceiver. The one or more processors are configured to: transmit a first reference signal to a device using a first set of antenna elements on a first polarization; transmit a second reference signal to the device using a second set of antenna elements on a second polarization; receive an instruction for inter-polarization phase adjustment from the device; and apply the inter-polarization phase adjustment to at least one of the first set of antenna elements or the second set of antenna elements for communication with the device.

[0119] In aspect 30, the apparatus of aspect 29 includes one or more processors further configured to: communicate with the device on a dual-polarized link using a beam pair; and receive from the device a report of a rank switching to rank-one communication, wherein the transmission of a first reference signal and a second reference signal is based on the receipt of the report of the rank switching.

[0120] In aspect 31, the apparatus of aspect 30 includes one or more processors further configured to: transmit a configuration indicating different polarization transmission configurations for the first reference signal and the second reference signal based on a received report of rank switching.

[0121] In aspect 32, the apparatus of aspect 30 includes one or more processors configured to: transmit a first reference signal based on a first beam indicated in the configuration, and transmit a second reference signal based on a second beam indicated in the configuration.

[0122] In aspect 33, the apparatus of any of aspects 29 to 32 includes: wherein interpolarity phase adjustment compensation compensates for the path distance difference between a first reference signal based on a first polarization and a second reference signal based on a second polarization.

[0123] In aspect 34, the apparatus of any of aspects 29 to 33 includes: wherein the path distance difference corresponds to the beam angle difference between a first reference signal transmitted using a first set of antenna elements and a second reference signal transmitted using a second set of antenna elements.

[0124] In aspect 35, the apparatus as in aspect 34 includes: wherein the path distance difference further corresponds to the relative movement direction of at least one of the second device or reflector relative to the first device.

[0125] In aspect 36, the apparatus of any of aspects 29 to 35 includes wherein the one or more processors are further configured to: transmit a third reference signal to the second device using a first antenna element set of the first device on a first polarization; transmit a fourth reference signal to the second device using a second antenna element set of the first device on a second polarization; receive a second polarization phase adjustment from the second device; and apply the second polarization phase adjustment to at least one of the first antenna element set or the second antenna element set for communication with the second device.

[0126] Aspect 37 is a device for wireless communication, including means for performing one or more methods as described in any of aspects 1 to 18.

[0127] Aspect 38 is a computer-readable medium comprising code executable by one or more processors to perform operations of one or more methods of any of aspects 1 to 18.

[0128] The detailed description above, in conjunction with the accompanying drawings, describes examples and does not represent only examples that can be implemented or fall within the scope of the claims. The term "example" as used in this description means "serving as an example, instance, or illustration," and not "superior to" or "better than other examples." This detailed description includes specific details to provide an understanding of the described techniques. However, these techniques may be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0129] Information and signals can be represented using any of a wide variety of different techniques and technologies. For example, data, instructions, commands, information, signals, bits, symbols, and chips, which may be referred to throughout the above description, can be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or light particles, computer-executable code or instructions stored on a computer-readable medium, or any combination thereof.

[0130] The various explanatory frames and components described herein can be implemented or executed using specially programmed devices, such as, but not limited to, processors, digital signal processors (DSPs), ASICs, field-programmable gate arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic, discrete hardware components, or any combination thereof, designed to perform the functions described herein. A specially programmed processor can be a microprocessor, but in alternatives, the processor can be any conventional processor, controller, microcontroller, or state machine. A specially programmed processor can also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors cooperating with a DSP core, or any other such configuration.

[0131] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored as one or more instructions or codes on or transmitted via a non-transient computer-readable medium. Other examples and implementations fall within the scope and spirit of this disclosure and the appended claims. For example, due to the nature of software, the aforementioned functions may be implemented using software, hardware, firmware, hardwired, or any combination thereof executed by a specially programmed processor. Features implementing the functions may also be physically located in various locations, including being distributed such that portions of the function are implemented in different physical locations. Moreover, as used herein (including in the claims), the "or" used in a list of items followed by "at least one of" indicates a disjunctive enumeration, such that an enumeration such as "at least one of A, B, or C" represents A or B or C or AB or AC or BC or ABC (i.e., A and B and C).

[0132] Computer-readable media includes both computer storage media and communication media, encompassing any medium that facilitates the transfer of a computer program from one location to another. Storage media can be any available medium accessible to a general-purpose or special-purpose computer. By way of example and not limitation, computer-readable media may include RAM, ROM, EEPROM, CD-ROM or other optical disc storage, disk storage or other magnetic storage devices, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible to a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Similarly, any connection is also legitimately referred to as computer-readable media. For example, if software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then such coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of media. As used in this article, disk and disc include compact discs (CDs), laser discs, optical discs, digital multi-purpose discs (DVDs), floppy disks, and Blu-ray discs. Disks often magnetically reproduce data, while discs optically reproduce data using lasers. Combinations of these media are also included within the scope of computer-readable media.

[0133] The prior description of this disclosure is provided to enable those skilled in the art to make or use it. Various modifications to this disclosure will readily be apparent to those skilled in the art, and the common principles defined herein can be applied to other variations without departing from the spirit or scope of this disclosure. Furthermore, although elements of the described aspects and / or embodiments may be described or claimed in the singular, the plural is also contemplated unless explicitly stated to be limited to the singular. Additionally, all or part of any aspect and / or embodiment may be used in conjunction with all or part of any other aspect and / or embodiment unless otherwise stated. Thus, this disclosure is not limited to the examples and designs described herein, but should be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for wireless communication at a first device, comprising: Using beam pairs to communicate with a second device on a dual-polarized link, wherein the second device has a non-co-located dual-polarized antenna array; The report describes a rank switching from the dual-polarized link to rank-one communication; Based on the rank switching described in the report, the second device receives a first reference signal transmitted using the first antenna element set of the non-co-located dual-polarized antenna array on the first polarization and a second reference signal transmitted using the second antenna element set of the non-co-located dual-polarized antenna array on the second polarization; as well as The second device is given an instruction to perform inter-polarity phase adjustment on a signal transmitted from the first antenna element set or the second antenna element set, wherein the inter-polarity phase adjustment is based on the phase difference between the first reference signal and the second reference signal.

2. The method of claim 1, further comprising: Based on reporting the rank switching to the second device, a configuration indicating different polarization transmission configurations for the first reference signal and the second reference signal is received.

3. The method of claim 2, wherein the first reference signal is received based on a first beam indicated in the configuration, and the second reference signal is received based on a second beam indicated in the configuration.

4. The method of claim 1, wherein reporting the rank switch includes reporting the rank switch to the second device in channel state feedback.

5. The method of claim 1, wherein receiving the first reference signal comprises receiving the first reference signal with the first polarization of the first antenna element set at the first device, wherein receiving the second reference signal comprises receiving the second reference signal with the second polarization of the second antenna element set at the first device, wherein the inter-polarization phase adjustment is based on a first phase of the first reference signal received with the first polarization of the first antenna element set and a second phase of the second reference signal received with the second polarization of the second antenna element set.

6. The method of claim 1, wherein the interpolarization phase adjustment compensates for the path distance difference between the first reference signal based on the first polarization and the second reference signal based on the second polarization.

7. A method for wireless communication at a first device, wherein the first device has a non-co-located dual-polarized antenna array, the method comprising: Use beam pairs to communicate with a second device over a dual-polarized link; Receive a report from the second device regarding a rank switch from the dual-polarized link to rank-one communication; Based on the received report regarding the rank switching, the first reference signal is transmitted to the second device using the first antenna element set of the non-co-located dual-polarized antenna array of the first device in the first polarization, and the second reference signal is transmitted to the second device using the second antenna element set of the non-co-located dual-polarized antenna array of the first device in the second polarization. The device receives an instruction for inter-polarization phase adjustment, the inter-polarization phase adjustment being based on the phase difference between the first reference signal and the second reference signal; as well as The inter-polarity phase adjustment is applied to at least one of the first antenna element set or the second antenna element set for communication with the second device.

8. The method of claim 7, further comprising: Based on receiving reports of the rank switching, a configuration indicating different polarization transmission configurations for the first reference signal and the second reference signal is transmitted.

9. The method of claim 8, wherein the first reference signal is transmitted based on a first beam indicated in the configuration, and the second reference signal is transmitted based on a second beam indicated in the configuration.

10. The method of claim 7, wherein the interpolarity phase adjustment compensation is based on the path distance difference between the first reference signal based on the first polarization and the second reference signal based on the second polarization.

11. The method of claim 7, further comprising: Based on the detection of at least one of beampair switching, movement of the second device, or change in channel environment parameters: The third reference signal is transmitted to the second device using the first antenna element set on the first polarization of the non-co-located dual-polarized antenna array of the first device; The second antenna element set on the second polarization of the non-co-located dual-polarized antenna array of the first device is used to transmit a fourth reference signal to the second device. Receive the second polarization phase adjustment from the second device; as well as The second inter-polarization phase adjustment is applied to at least one of the first antenna element set or the second antenna element set for communication with the second device.

12. An apparatus for wireless communication, comprising: transceiver; A memory configured to store instructions; as well as One or more processors communicatively coupled to the memory and the transceiver, wherein the one or more processors are configured to: Using beam pairs to communicate with devices on a dual-polarized link, wherein the devices have a non-co-located dual-polarized antenna array; The report describes a rank switching from the dual-polarized link to rank-one communication; Based on the rank switching described in the report, the device receives a first reference signal transmitted using a first set of antenna elements on a first polarization of the non-co-located dual-polarized antenna array and a second reference signal transmitted using a second set of antenna elements on a second polarization of the non-co-located dual-polarized antenna array. as well as The device is given an instruction to perform inter-polarity phase adjustment on a signal transmitted from the first antenna element set or the second antenna element set, wherein the inter-polarity phase adjustment is based on the phase difference between the first reference signal and the second reference signal.

13. The apparatus of claim 12, wherein the one or more processors are further configured to: receive a configuration indicating different polarization transmission configurations for the first reference signal and the second reference signal based on reporting the rank switching to the apparatus.

14. The apparatus of claim 13, wherein the one or more processors are configured to receive the first reference signal based on a first beam indicated in the configuration, and to receive the second reference signal based on a second beam indicated in the configuration.

15. The apparatus of claim 12, wherein the one or more processors are configured to report the rank switch at least in part by reporting the rank switch to the device in channel state feedback.

16. The apparatus of claim 12, wherein the one or more processors are configured to receive the first reference signal at least partially by receiving the first reference signal with the first polarization of the first antenna element set at the apparatus, wherein the one or more processors are configured to receive the second reference signal at least partially by receiving the second reference signal with the second polarization of the second antenna element set at the apparatus, wherein the inter-polarization phase adjustment is based on a first phase of the first reference signal received with the first polarization of the first antenna element set and a second phase of the second reference signal received with the second polarization of the second antenna element set.

17. The apparatus of claim 12, wherein the interpolarization phase adjustment compensation is based on the path distance difference between the first reference signal based on the first polarization and the second reference signal based on the second polarization.

18. An apparatus for wireless communication, wherein the apparatus has a non-co-located dual-polarized antenna array, the apparatus comprising: transceiver; A memory configured to store instructions; as well as One or more processors communicatively coupled to the memory and the transceiver, wherein the one or more processors are configured to: Use beam pairs to communicate with devices over a dual-polarized link; Receive a report from the device regarding a rank switch from the dual-polarized link to rank-one communication; Based on the received report regarding the rank switching, the device transmits a first reference signal to the device using the first antenna element set of the non-co-located dual-polarized antenna array on the first polarization and a second reference signal to the device using the second antenna element set of the non-co-located dual-polarized antenna array on the second polarization; The device receives an instruction for inter-polarization phase adjustment, the inter-polarization phase adjustment being based on the phase difference between the first reference signal and the second reference signal; as well as The inter-polarity phase adjustment is applied to at least one of the first antenna element set or the second antenna element set for communication with the device.

19. The apparatus of claim 18, wherein the one or more processors are further configured to: transmit a configuration indicating different polarization transmission configurations for the first reference signal and the second reference signal based on receiving reports of the rank switching.

20. The apparatus of claim 19, wherein the one or more processors are further configured to: transmit the first reference signal based on a first beam indicated in the configuration, and transmit the second reference signal based on a second beam indicated in the configuration.

21. The apparatus of claim 18, wherein the interpolarization phase adjustment compensation is based on the path distance difference between the first reference signal based on the first polarization and the second reference signal based on the second polarization.

22. The apparatus of claim 18, wherein the one or more processors are further configured to: Based on the detection of at least one of beampair switching, device movement, or a change in channel environment parameters: The third reference signal is transmitted to the device using the first antenna element set of the non-co-located dual-polarized antenna array of the device in the first polarization; The fourth reference signal is transmitted to the device using the second antenna element set on the second polarization of the non-co-located dual-polarized antenna array of the device; Receive the second polarization phase adjustment from the device; as well as The second inter-polarization phase adjustment is applied to at least one of the first antenna element set or the second antenna element set for communication with the device.

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