Spatial diversity in communication based on coaxial multi-circular orbital angular momentum multiplexing

Abstract

In summary, various aspects of the present disclosure relate to wireless communications. In some aspects, a transmitter of communications based on orbital angular momentum (OAM) multiplexing may send a configuration message indicating a configured transmitter circle set to a receiver of communications based on OAM multiplexing. The transmitter may use the configured transmitter circle set to send at least one data stream to the receiver. Numerous other aspects are provided.

Description

Technical Field

[0001]

[0006] Generally speaking, aspects of the disclosure relate to wireless communications, and aspects of the disclosure relate to techniques and apparatus for spatial diversity in coaxial multi-circular orbital angular momentum multiplexing based communications. Background Art

[0002] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasting. Typical wireless communication systems may employ multiple access technologies that can support communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple access technologies 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, single carrier frequency division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and long term evolution (LTE). LTE / LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard released by the Third Generation Partnership Project (3GPP).

[0003] A wireless network may include multiple base stations (BSs) that can support communications for multiple user equipment (UEs). A user equipment (UE) may communicate with a base station (BS) via a downlink and an uplink. A downlink (or forward link) refers to a communication link from a BS to a UE, and an uplink (or reverse link) refers to a communication link from a UE to a BS. As will be described in more detail herein, a BS may be referred to as a Node B, gNB, access point (AP), radio head, transmit receive point (TRP), new radio (NR) BS, 5G Node B, etc.

[0004] The above multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different user devices to communicate at the city, country, region, and even global level. New Radio (NR) (which may also be referred to as 5G) is an enhancement set to the LTE mobile standard released by the Third Generation Partnership Project (3GPP). NR is designed to better integrate with other open standards by improving spectrum efficiency, reducing costs, improving services, utilizing new spectrum, and using orthogonal frequency division multiplexing (OFDM) (CP-OFDM) with cyclic prefix (CP) on the downlink (DL), using CP-OFDM and / or SC-FDM (e.g., also referred to as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink (UL), so as to better support mobile broadband Internet access, as well as support beamforming, multiple input multiple output (MIMO) antenna technology and carrier aggregation. As the demand for mobile broadband access continues to grow, it is still useful to further improve LTE, NR and other radio access technologies. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] In order to fully understand the above-mentioned features of the present disclosure, a more specific description of the invention briefly summarized above can be obtained by referring to various aspects (some of which are shown in the accompanying drawings). However, it should be noted that the accompanying drawings only illustrate certain typical aspects of the present disclosure and are therefore not considered to limit the scope of the present disclosure, as the description may allow for other equally effective aspects. The same reference numerals in different drawings may identify the same or similar elements.

[0006] Figure 1 is a diagram illustrating an example of a wireless network in accordance with various aspects of the present disclosure.

[0007] Figure 2 is a diagram illustrating an example of a base station communicating with a UE in a wireless network according to various aspects of the present disclosure.

[0008] Figure 3 and 4 is a diagram illustrating an example of orbital angular momentum (OAM) multiplexing based communications in accordance with various aspects of the present disclosure.

[0009] Figure 5 is a diagram illustrating examples associated with coaxial multi-circle OAM multiplexing-based communications according to various aspects of the present disclosure.

[0010] Figure 6-8 is a diagram illustrating an example associated with spatial diversity in coaxial multi-circle OAM multiplexing based communications according to various aspects of the present disclosure.

[0011] Fig. 9 and 10 is a diagram illustrating example processes associated with spatial diversity in coaxial multi-circle OAM multiplexing based communications in accordance with various aspects of the present disclosure.

[0012] Fig.11 and 12 is a block diagram of an example apparatus for wireless communications in accordance with various aspects of the present disclosure. Summary of the invention

[0013] In some aspects, a transmitter of orbital angular momentum (OAM) multiplexing-based communication includes a memory and one or more processors operatively coupled to the memory, the memory and the one or more processors being configured to: send a configuration message indicating a configured transmitter circle set to a receiver of the OAM multiplexing-based communication; and use the configured transmitter circle set to send at least one data stream to the receiver.

[0014] In some aspects, a receiver of OAM multiplexing-based communication includes a memory and one or more processors operatively coupled to the memory, the memory and the one or more processors configured to: receive a configuration message indicating a configured transmitter circle set from a transmitter of the OAM multiplexing-based communication; and receive at least one data stream from the transmitter using the configured transmitter circle set.

[0015] In some aspects, a method of wireless communication performed by a transmitter of OAM multiplexing-based communication includes: sending a configuration message indicating a configured transmitter circle set to a receiver of the OAM multiplexing-based communication; and sending at least one data stream to the receiver using the configured transmitter circle set.

[0016] In some aspects, a method of wireless communication performed by a receiver of OAM multiplexing-based communication includes: receiving a configuration message indicating a configured transmitter circle set from a transmitter of the OAM multiplexing-based communication; and receiving at least one data stream from the transmitter using the configured transmitter circle set.

[0017] In some aspects, a non-transitory computer-readable medium storing an instruction set for wireless communication includes one or more instructions that, when executed by one or more processors of a transmitter of OAM multiplexing-based communication, cause the transmitter to: send a configuration message indicating a configured transmitter circle set to a receiver of the OAM multiplexing-based communication; and send at least one data stream to the receiver using the configured transmitter circle set.

[0018] In some aspects, a non-transitory computer-readable medium storing an instruction set for wireless communication includes one or more instructions that, when executed by one or more processors of a receiver of OAM multiplexing-based communication, cause the receiver to: receive a configuration message indicating a configured transmitter circle set from a transmitter of the OAM multiplexing-based communication; and receive at least one data stream from the transmitter using the configured transmitter circle set.

[0019] In some aspects, an apparatus for OAM multiplexing-based communication includes: a unit for sending a configuration message indicating a configured transmitter circle set to a receiver of the OAM multiplexing-based communication; and a unit for sending at least one data stream to the receiver using the configured transmitter circle set.

[0020] In some aspects, an apparatus for OAM multiplexing-based communication includes: a unit for receiving a configuration message indicating a configured transmitter circle set from a transmitter of the OAM multiplexing-based communication; and a unit for receiving at least one data stream from the transmitter using the configured transmitter circle set.

[0021] In general, various aspects include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication devices, transmitters, receivers and / or processing systems as fully described herein with reference to the accompanying drawings and description and as illustrated by the accompanying drawings and description.

[0022] The foregoing has been fairly broadly summarized according to the features and technical advantages of the examples of the present disclosure, so that the following detailed description can be better understood. Additional features and advantages will be described below. The disclosed concepts and specific examples can be easily used as the basis for modifying or designing other structures for the same purpose of achieving the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. When considered in conjunction with the accompanying drawings, the characteristics of the concepts disclosed herein (both their organization and method of operation) and the associated advantages will be better understood according to the description below. Each of the figures in the accompanying drawings is provided for the purpose of illustration and description, and is not intended to be a definition of the limitations of the claims. DETAILED DESCRIPTION

[0023] The following is a more complete description of various aspects of the present disclosure with reference to the accompanying drawings. However, the present disclosure can be embodied in many different forms and should not be construed as being limited to any specific structure or function presented throughout the present disclosure. More specifically, these aspects are provided so that the present disclosure will be thorough and complete, and the scope of the present disclosure will be fully conveyed to those skilled in the art. Based on the teachings herein, it should be understood by those skilled in the art that the scope of the present disclosure is intended to cover any aspect of the present disclosure disclosed herein, whether the aspect is implemented independently of any other aspect of the present disclosure or implemented in combination with any other aspect. For example, using any number of aspects set forth herein, a device can be implemented or a method can be implemented. In addition, the scope of the present disclosure is intended to cover such a device or method implemented using other structures, functions, or structures and functions other than the various aspects of the present disclosure set forth herein or different from the various aspects of the present disclosure set forth herein. It should be understood that any aspect of the present disclosure disclosed herein can be embodied by one or more elements of the claims.

[0024] Several aspects of telecommunication systems will now be presented with reference to various devices and techniques. These devices and techniques will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as "elements"). These elements may be implemented using hardware, software, or a combination thereof. Whether such elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0025] It should be noted that although various aspects may be described herein using terminology generally associated with 5G or NR radio access technologies (RATs), various aspects of the present disclosure may be applied to other RATs, such as 3G RATs, 4G RATs, and / or RATs beyond 5G (e.g., 6G).

[0026] Figure 11 is a diagram showing an example of a wireless network 100 according to various aspects of the present disclosure. The wireless network 100 may be or may include elements of a 5G (NR) network and / or an LTE network, as well as other examples. The wireless network 100 may include a plurality of base stations 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities. A base station (BS) is an entity that communicates with a user equipment (UE) and may also be referred to as an NR BS, Node B, gNB, 5G Node B (NB), access point, transmit receive point (TRP), etc. Each BS may provide communication coverage for a specific geographic area. In 3GPP, the term "cell" may refer to a coverage area of ​​a BS and / or a BS subsystem serving the coverage area, depending on the context in which the term is used.

[0027] A BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and / or another type of cell. A macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscription. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscription. A femto cell may cover a relatively small geographic area (e.g., a residence) and may allow restricted access by UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG)). A BS for a macro cell may be referred to as a macro BS. A BS for a pico cell may be referred to as a pico BS. A BS for a femto cell may be referred to as a femto BS or a home BS. In Figure 1 In the example shown in , BS 110a may be a macro BS for macro cell 102a, BS 110b may be a pico BS for pico cell 102b, and BS 110c may be a femto BS for femto cell 102c. A BS may support one or more (e.g., three) cells. The terms "eNB", "base station", "NR BS", "gNB", "TRP", "AP", "Node B", "5G NB", and "cell" may be used interchangeably herein.

[0028] In some aspects, the cells may not necessarily be stationary, and the geographic area of ​​the cells may move depending on the location of the mobile BS. In some aspects, the BSs may be interconnected to each other and / or to one or more other BSs or network nodes (not shown) in the wireless network 100 through various types of backhaul interfaces (such as direct physical connections or virtual networks) using any suitable transport network.

[0029] The wireless network 100 may also include a relay station. A relay station is an entity that can receive data transmissions from an upstream station (e.g., a BS or a UE) and send data transmissions to a downstream station (e.g., a UE or a BS). A relay station may also be a UE that is capable of relaying transmissions for other UEs. Figure 1 In the example shown in , a relay BS 110d may communicate with a macro BS 110a and a UE 120d to facilitate communication between the BS 110a and the UE 120d. A relay BS may also be referred to as a relay station, a relay base station, a relay, or the like.

[0030] The wireless network 100 may be a heterogeneous network including different types of BSs, such as a macro BS, a pico BS, a femto BS, a relay BS, etc. These different types of BSs may have different transmit power levels, different coverage areas, and different effects on interference in the wireless network 100. For example, a macro BS may have a high transmit power level (e.g., 5 to 40 watts), while a pico BS, a femto BS, and a relay BS may have a lower transmit power level (e.g., 0.1 to 2 watts).

[0031] A network controller 130 may be coupled to a set of BSs and may provide coordination and control for these BSs. The network controller 130 may communicate with the BSs via a backhaul. The BSs may also communicate with each other via a wireless or wired backhaul (eg, directly or indirectly).

[0032] UE 120 (e.g., 120a, 120b, 120c) can be dispersed throughout the wireless network 100, and each UE can be stationary or mobile. UE can also be referred to as an access terminal, terminal, mobile station, subscriber unit, station, etc. UE can be a cellular phone (e.g., a smart phone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet device, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or apparatus, a biometric sensor / device, a wearable device (smart watch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet, etc.)), an entertainment device (e.g., a music or video device, or a satellite radio unit, etc.), a vehicle component or sensor, a smart meter / sensor, an industrial manufacturing device, a global positioning system device, or any other suitable device configured to communicate via a wireless or wired medium.

[0033] Some UEs may be considered as machine type communication (MTC) or evolved or enhanced machine type communication (eMTC) UEs. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors and / or location tags, which may communicate with a base station, another device (e.g., a remote device), or some other entity. A wireless node may provide a connection to a network (e.g., a wide area network such as the Internet or a cellular network) or a connection to a network, for example, via a wired or wireless communication link. Some UEs may be considered as Internet of Things (IoT) devices, and / or may be implemented as NB-IoT (narrowband Internet of Things) devices. Some UEs may be considered as customer premises equipment (CPE). UE 120 may be included inside a housing that houses components of UE 120 (such as a processor component and / or a memory component). In some aspects, a processor component and a memory component may be coupled together. For example, a processor component (e.g., one or more processors) and a memory component (e.g., a memory) may be operationally coupled, communicatively coupled, electronically coupled, and / or electrically coupled.

[0034] Generally, any number of wireless networks can be deployed in a given geographic area. Each wireless network can support a specific RAT and can operate on one or more frequencies. RAT can also be referred to as radio technology, air interface, etc. Frequency can also be referred to as carrier, channel, etc. Each frequency can support a single RAT in a given geographic area to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks can be deployed.

[0035] In some aspects, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly using one or more sidelink channels (e.g., without using base station 110 as an intermediary to communicate with each other). For example, UE 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocol (e.g., which may include vehicle-to-vehicle (V2V) protocol, vehicle-to-infrastructure (V2I) protocol, etc.), and / or mesh network. In this case, UE 120 may perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by base station 110.

[0036] The devices of the wireless network 100 can communicate using an electromagnetic spectrum, which can be subdivided into various categories, frequency bands, channels, etc. based on frequency or wavelength. For example, the devices of the wireless network 100 can communicate using an operating frequency band having a first frequency range (FR1) (which can span from 410 MHz to 7.125 GHz), and / or can communicate using an operating frequency band having a second frequency range (FR2) (which can span from 24.25 GHz to 52.6 GHz). The frequencies between FR1 and FR2 are sometimes referred to as intermediate frequencies. Although a portion of FR1 is greater than 6 GHz, FR1 is often referred to as a "sub-6 GHz" band. Similarly, FR2 is often referred to as a "millimeter wave" band, although it is different from the extremely high frequency (EHF) band (30 GHz–300 GHz) identified as a "millimeter wave" band by the International Telecommunication Union (ITU). Therefore, unless otherwise explicitly stated, it should be understood that the term "sub-6 GHz" and the like (if used herein) can broadly represent frequencies less than 6 GHz, frequencies within FR1, and / or intermediate frequencies (e.g., greater than 7.125 GHz). Similarly, unless explicitly stated otherwise, it should be understood that the term "millimeter wave" and the like (if used herein) can broadly refer to frequencies within the EHF band, frequencies within FR2, and / or intermediate frequencies (e.g., less than 24.25 GHz). It is contemplated that the frequencies included in FR1 and FR2 may be modified, and the techniques described herein are applicable to those modified frequency ranges.

[0037] As noted above, Figure 1 is provided as an example. Other examples may differ from those described above. Figure 1 Examples described.

[0038] Figure 2 1 is a diagram illustrating an example of base station 110 communicating with UE 120 in wireless network 100 according to various aspects of the present disclosure. Base station 110 may be equipped with T antennas 234a through 234t, and UE 120 may be equipped with R antennas 252a through 252r, where in general, T≥1 and R≥1.

[0039] At the base station 110, the transmit processor 220 may receive data for one or more UEs from the data source 212, select one or more modulation and coding schemes (MCS) for each UE based at least in part on a channel quality indicator (CQI) received from the UE, process (e.g., encode and modulate) the data for the UE based at least in part on the MCS selected for each UE, and provide data symbols for all UEs. The transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI)) and control information (e.g., CQI requests, grants, and / or upper layer signaling), and provide overhead symbols and control symbols. The transmit processor 220 may also generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS) or demodulation reference signals (DMRS)) and synchronization signals (e.g., primary synchronization signals (PSS) or secondary synchronization signals (SSS)). A transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols, if applicable, and may provide T output symbol streams to T modulators (MOD) 232a to 232t. Each modulator 232 may process a corresponding output symbol stream (e.g., for OFDM) to obtain an output sample stream. Each modulator 232 may further process (e.g., convert to analog, amplify, filter, and up-convert) the output sample stream to obtain a downlink signal. T downlink signals from modulators 232a to 232t may be transmitted via T antennas 234a to 234t, respectively.

[0040] At UE 120, antennas 252a to 252r may receive downlink signals from base station 110 and / or other base stations, and may provide received signals to demodulators (DEMOD) 254a to 254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) the received signal to obtain input samples. Each demodulator 254 may further process the input samples (e.g., for OFDM) to obtain received symbols. A MIMO detector 256 may obtain received symbols from all R demodulators 254a to 254r, perform MIMO detection on the received symbols (if applicable), and provide detected symbols. A receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide decoded data for UE 120 to a data sink 260, and provide decoded control information and system information to a controller / processor 280. The term "controller / processor" may refer to one or more controllers, one or more processors, or a combination thereof. The channel processor may determine a reference signal received power (RSRP) parameter, a received signal strength indicator (RSSI) parameter, a reference signal received quality (RSRQ) parameter, and / or a channel quality indicator (CQI) parameter, among other examples. In some aspects, one or more components of UE 120 may be included in housing 284.

[0041] The network controller 130 may include a communication unit 294, a controller / processor 290, and a memory 292. The network controller 130 may include, for example, one or more devices in a core network. The network controller 130 may communicate with the base station 110 via the communication unit 294.

[0042] Antennas (e.g., antennas 234a to 234t and / or antennas 252a to 252r) may include or may be included in one or more antenna panels, antenna groups, antenna element sets, and / or antenna arrays, among other examples. Antenna panels, antenna groups, antenna element sets, and / or antenna arrays may include one or more antenna elements. Antenna panels, antenna groups, antenna element sets, and / or antenna arrays may include coplanar antenna element sets and / or non-coplanar antenna element sets. Antenna panels, antenna groups, antenna element sets, and / or antenna arrays may include antenna elements within a single housing and / or antenna elements within multiple housings. Antenna panels, antenna groups, antenna element sets, and / or antenna arrays may include antennas coupled to one or more transmitting and / or receiving components (such as Figure 2 One or more antenna elements of one or more components).

[0043] On the uplink, at the UE 120, a transmit processor 264 may receive and process data from a data source 262 and control information from a controller / processor 280 (e.g., for reports including RSRP, RSSI, RSRQ, and / or CQI). The transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266 (if applicable), further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM or CP-OFDM), and transmitted to the base station 110. In some aspects, the modulator and demodulator (e.g., MOD / DEMOD 254) of the UE 120 may be included in a modem of the UE 120. In some aspects, the UE 120 includes a transceiver. The transceiver may include any combination of antennas 252, modulators and / or demodulators 254, MIMO detectors 256, receive processors 258, transmit processors 264, and / or TX MIMO processors 266. The transceiver may be used by a processor (e.g., controller / processor 280) and memory 282 to perform aspects of any of the methods described herein (e.g., as described with reference to Figure 6-10 described).

[0044] At the base station 110, uplink signals from the UE 120 and other UEs may be received by the antenna 234, processed by the demodulator 232, detected by the MIMO detector 236 (if applicable), and further processed by the receive processor 238 to obtain decoded data and control information sent by the UE 120. The receive processor 238 may provide the decoded data to the data sink 239 and provide the decoded control information to the controller / processor 240. The base station 110 may include a communication unit 244 and communicate with the network controller 130 via the communication unit 244. The base station 110 may include a scheduler 246 to schedule the UE 120 for downlink and / or uplink communications. In some aspects, the modulator and demodulator (e.g., MOD / DEMOD 232) of the base station 110 may be included in a modem of the base station 110. In some aspects, the base station 110 includes a transceiver. The transceiver may include any combination of antennas 234, modulators and / or demodulators 232, MIMO detectors 236, receive processors 238, transmit processors 220, and / or TX MIMO processors 230. The transceiver may be used by a processor (e.g., controller / processor 240) and memory 242 to perform aspects of any of the methods described herein (e.g., as described with reference to Figure 6-10 described).

[0045] The controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other components in may perform one or more techniques associated with spatial diversity in coaxial multi-circular orbital angular momentum (OAM) multiplexing-based communications, as described in more detail elsewhere herein. In some aspects, the OAM multiplexing-based communications transmitter and / or the OAM multiplexing-based communications receiver described herein is Figure 2 The base station 110 shown is included in the base station 110, or includes one or more components of the base station 110. In some aspects, the transmitter of OAM multiplexing-based communication and / or the receiver of OAM multiplexing-based communication described herein is Figure 2 The UE 120 shown is included in the UE 120, or includes one or more components of the UE 120. For example, the controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other component in may perform or direct e.g. Fig. 9 The process of 900 Fig.10 1000 and / or operations of other processes as described herein. Memories 242 and 282 may store data and program codes for base station 110 and UE 120, respectively. In some aspects, memory 242 and / or memory 282 may include a non-transitory computer-readable medium storing one or more instructions (e.g., code and / or program code) for wireless communication. For example, one or more instructions, when executed by one or more processors of base station 110 and / or UE 120 (e.g., directly, or after compilation, conversion, and / or interpretation), may cause one or more processors, UE 120, and / or base station 110 to perform or instruct, for example Fig. 9 The process of 900 Fig.10 The operations of process 1000 and / or other processes as described herein. In some aspects, executing instructions may include running instructions, converting instructions, compiling instructions, and / or interpreting instructions, among other examples.

[0046] In some aspects, a transmitter of OAM multiplexing-based communication includes: a unit for sending a configuration message indicating a configured transmitter circle set to a receiver of OAM multiplexing-based communication; and / or a unit for sending at least one data stream to a receiver using the configured transmitter circle set. In some aspects, the unit for the transmitter to perform the operations described herein may include, for example, one or more of the transmit processor 220, the TX MIMO processor 230, the modulator 232, the antenna 234, the demodulator 232, the MIMO detector 236, the receive processor 238, the controller / processor 240, the memory 242, or the scheduler 246. In some aspects, the unit for the transmitter to perform the operations described herein may include, for example, one or more of the antenna 252, the demodulator 254, the MIMO detector 256, the receive processor 258, the transmit processor 264, the TX MIMO processor 266, the modulator 254, the controller / processor 280, or the memory 282.

[0047] In some aspects, the transmitter includes: means for sending a status message to the receiver, the status message indicating the number of transmitter circles available. In some aspects, the transmitter includes: means for sending a status message to the receiver, the status message indicating the number of transmitter circles available for each of a plurality of OAM modes. In some aspects, the transmitter includes: means for sending a status message to the receiver, the status message indicating the maximum number of modes that can be used by the indicated transmitter circle.

[0048] In some aspects, the transmitter includes: a unit for receiving a report message from a receiver, the report message indicating a recommended transmitter circle set to be used. In some aspects, the transmitter includes: a unit for sending a plurality of reference signals corresponding to a plurality of transmitter circles to the receiver, wherein at least one of the plurality of reference signals corresponds to an OAM mode of the corresponding transmitter circle, and wherein the recommended transmitter circle set is based at least in part on a plurality of measured channel states corresponding to the plurality of reference signals. In some aspects, the transmitter includes: a unit for sending a first signal using a first OAM mode of a first subset of transmitter circles, wherein the first signal is associated with a first data stream; or a unit for sending a second signal using a second OAM mode of a second subset of transmitter circles, wherein the second signal is associated with a second data stream.

[0049] In some aspects, a receiver of OAM multiplexing-based communication includes: a unit for receiving a configuration message indicating a configured transmitter circle set from a transmitter of OAM multiplexing-based communication; and / or a unit for receiving at least one data stream from the transmitter using the configured transmitter circle set. In some aspects, the unit for the receiver to perform the operations described herein may include, for example, one or more of the transmit processor 220, the TX MIMO processor 230, the modulator 232, the antenna 234, the demodulator 232, the MIMO detector 236, the receive processor 238, the controller / processor 240, the memory 242, or the scheduler 246. In some aspects, the unit for the receiver to perform the operations described herein may include, for example, one or more of the antenna 252, the demodulator 254, the MIMO detector 256, the receive processor 258, the transmit processor 264, the TX MIMO processor 266, the modulator 254, the controller / processor 280, or the memory 282.

[0050] In some aspects, the receiver includes: means for receiving a status message from a transmitter, the status message indicating the number of transmitter circles available. In some aspects, the receiver includes: means for receiving a status message from a transmitter, the status message indicating the number of transmitter circles available for each of a plurality of OAM modes. In some aspects, the receiver includes: means for receiving a status message from a transmitter, the status message indicating the maximum number of modes that can be used by the indicated transmitter circle.

[0051] In some aspects, the receiver includes: a unit for sending a report message to a transmitter, the report message indicating a recommended set of transmitter circles to be used. In some aspects, the receiver includes: a unit for receiving a plurality of reference signals corresponding to a plurality of transmitter circles from a transmitter, wherein at least one of the plurality of reference signals corresponds to an OAM mode of a corresponding transmitter circle, and wherein the recommended set of transmitter circles is based at least in part on a plurality of measured channel states corresponding to the plurality of reference signals. In some aspects, the receiver includes: a unit for receiving a first signal using a first OAM mode of a first subset of transmitter circles, wherein the first signal is associated with a first data stream; or a unit for receiving a second signal using a second OAM mode of a second subset of transmitter circles, wherein the second signal is associated with a second data stream.

[0052] Although Figure 2The blocks in the 200 and 210 are shown as distinct components, but the functionality described above with respect to these blocks may be implemented in a single hardware, software, or combined component or in various combinations of components. For example, the functionality described with respect to the transmit processor 264, the receive processor 258, and / or the TX MIMO processor 266 may be performed by or under the control of the controller / processor 280.

[0053] As noted above, Figure 2 is provided as an example. Other examples may differ from those described above. Figure 2 Examples described.

[0054] Figure 3 300 is a diagram illustrating an example of multi-aperture OAM multiplexing-based communication according to various aspects of the present disclosure. As shown, a transmitter 305 and a receiver 310 can communicate with each other using OAM multiplexing-based communication. According to various aspects, the transmitter 305 and / or the receiver 310 can communicate with one or more UEs (e.g., Figure 1 UE 120, etc.), one or more base stations (e.g., Figure 1 It can be implemented by combining the base station 110 shown in the figure, one or more vehicles with one or more vehicle-mounted UEs, etc.

[0055] As shown, the transmitter 305 may include a plurality of transmitter apertures 315 and a plurality of corresponding transmitter spiral phase plates (SPPs) 320. The receiver 310 may include a plurality of receiver apertures 325 and a plurality of corresponding receiver SPPs 330. Each transmitter aperture 315 may transmit a wave of an OAM mode (e.g., l=-1 and l=1). Each wave may be modulated by a corresponding transmitter SPP 320 to produce a spiral wave 335. In some aspects, the SPP may be or include a transmitter circle. For example, in some aspects, each SPP may be referred to as a transmitter circle (or receiver circle) due to the circular nature of the cross-section of the transmitted spiral wave.

[0056] Each receiver aperture 325 may receive a wave 335 transmitted by a corresponding transmitter 305. The wave 335 may be demodulated by a corresponding receiver SPP 330 to convert the spiral wave into a donut-shaped wave received by the corresponding receiver aperture 325. Due to the mutual orthogonality between OAM modes, a wave 335 of one OAM mode may not be received by a receiver aperture 325 corresponding to another OAM mode.

[0057] As noted above, Figure 3 is provided as an example. Other examples may differ from those described above. Figure 3 Examples described.

[0058] Figure 44 is a diagram illustrating an example 400 of OAM multiplexing-based communication using a uniform circular array (UCA) antenna in accordance with various aspects of the present disclosure. As shown, a transmitter 405 and a receiver 410 can communicate with each other using OAM multiplexing-based communication. According to various aspects, the transmitter 405 and / or the receiver 410 can communicate with one or more UEs (e.g., Figure 1 UE 120, etc.), one or more base stations (e.g., Figure 1 It can be implemented by combining the base station 110 shown in the figure, one or more vehicles with one or more vehicle-mounted UEs, etc.

[0059] As shown, the transmitter 405 includes a UCA 415 having a plurality of OAM antennas 420 configured in a circle (or at least approximately a circle). In this regard, the UCA 415 may be referred to as a transmitter circle (or a receiver circle). Similarly, the receiver 410 includes a UCA 425 having a plurality of OAM antennas 430 equipped in a circle (or at least approximately a circle). By setting the corresponding beamforming weights w1=[w 1,1 ,w 1,2 ,…,w 1,8 ] T By multiplying each antenna, the transmitter 405 can generate a signal port. If the weight of each antenna 420 is equal to in is the angle of the antenna in the circle, and l is the OAM mode order, then the beamforming port can be the equivalent OAM mode l. By using different beamforming weights Where l′≠l, the transmitter 405 can generate multiple OAM modes.

[0060] For the channel matrix H from each transmit antenna 420 to each receive antenna 430, the beamforming channel matrix and Any two columns of are orthogonal. Therefore, there is no crosstalk in the beamforming ports. Therefore, UCA OAM-based communication can efficiently achieve a high level of spatial multiplexing.

[0061] As described above, OAM communication can use SPP or UCA antennas to send multiple orthogonal signals with different OAM modes. SPP-based OAM generates continuous spiral waves, and therefore can theoretically form an infinite number of orthogonal OAM modes. But in practice, due to propagation divergence and one mode per SPP, the number of effective OAM modes is limited (e.g., four modes in academic experiments). UCA-based OAM generates discrete spiral waves, and therefore can form as many OAM modes as transmitter antennas. UCA-based OAM can be considered a form of MIMO, in which the transmission precoding weights and reception combining weights based on eigenvalues ​​are constantly equal to the discrete Fourier transform matrix, which is not affected by communication parameters (e.g., distance, aperture size, and carrier frequency), and can therefore be implemented at low cost.

[0062] As noted above, Figure 4 is provided as an example. Other examples may differ from those described above. Figure 4 Examples described.

[0063] Figure 5 5 is a diagram illustrating an example 500 associated with coaxial multi-circle OAM multiplexing based communication according to various aspects of the present disclosure. Multi-circle OAM multiplexing based communication may refer to communication between a transmitter 505 and a receiver 510. Multiple coaxial UCA antenna circles and / or multiple coaxial SPP based apertures may be implemented at the transmitter 505 and the receiver 510.

[0064] As indicated by reference numeral 515, each circle of the multi-circle transmitter 505 may be used to transmit multiple data streams of different OAM modes. For example, as shown, a first data stream for each circle may be transmitted using a first OAM mode ("mode 1"), and a second data stream for each circle may be transmitted using a second OAM mode ("mode 2"). In some aspects, the intra-circle streams may be orthogonal. Inter-circle streams may be orthogonal to different OAM modes or may be non-orthogonal to the same OAM mode. For each OAM mode, there may be inter-circle interference. For example, a stream transmitted from one circle using mode 1 may interfere with a stream transmitted from another circle using mode 1.

[0065] However, due to mutual interference between the same modes of different transmitter circles, traditional transmission schemes based on inter-mode orthogonality may not be feasible. In some cases, mutually interfering OAM modes in different aperture pairs can be precoded at the transmitter based on weights reported by the receiver. Although the feedback-based approach can achieve high channel gain when the reported precoding weights are aligned with the channel eigenvectors, the approach may have disadvantages. For example, the approach relies on feedback from the OAM receiver on the precoding weights, which may increase system complexity and may be challenging when the carrier frequency is high (e.g., 0.1 to 1.0 THz). The precoding weights may be variable, depending on channel parameters (e.g., propagation distance, Tx / Rx aperture radius, carrier frequency), and the flexibility of including support for various precoding weights may increase hardware complexity compared to the hardware required to support fixed precoding weights. Therefore, the implementation complexity of the feedback-based approach may exceed the gain.

[0066] Various aspects of the techniques and devices described herein can provide a method that is not based on feedback but involves spatial diversity transmission. In some aspects, a transmitter can use a spatial diversity scheme to send a data stream of an OAM mode in a group of multiple coaxial transmitter circles. For example, multiple data streams of different OAM modes can be sent, and each data stream can be associated with a spatial diversity transmission involving one or more transmitter circles in a set of available transmitter circles. The transmitter can send a status message indicating the number of available transmitter circles to the receiver, and the receiver can send a report message indicating the index of the preferred transmitter circle. The transmitter can send a configuration message indicating a configured transmitter circle set (a transmitter circle in an available transmitter circle to be used in the transmission). In this way, various aspects can facilitate reducing interference between antennas for communications based on OAM multiplexing. Therefore, various aspects can facilitate an increase in throughput, signal reliability, signal quality, etc. without unnecessarily increasing system complexity.

[0067] As noted above, Figure 5 is provided as an example. Other examples may differ from those described above. Figure 5 Examples described.

[0068] Figure 6 6 is a diagram illustrating an example 600 associated with spatial diversity in coaxial multi-circle OAM multiplexing based communications according to various aspects of the present disclosure. Figure 6 As shown, a transmitter 605 for communication based on OAM multiplexing and a receiver 610 for communication based on OAM multiplexing can communicate with each other. Figure 6As shown, the transmitter 605 and the receiver 610 may communicate via one or more signaling messages (message 1, message 2, message 3). Any one or more of these signaling messages may be sent via radio resource control (RRC) signaling, medium access control (MAC) control element (MAC-CE) and / or physical layer signaling (such as downlink control information (DCI), uplink control information (UCI) and / or sidelink control information (SCI)).

[0069] As shown at reference numeral 615, the transmitter 605 may send a status message to the receiver 610. The status message may indicate the number of transmitter circles N available. max,overall In some aspects, the status message (which may be referred to as "Message 1") may indicate the number of transmitter circles N available for each OAM mode m of the plurality of OAM modes. max,m The status message may indicate the maximum number of modes that may be used by the indicated transmitter circle.

[0070] In some use cases, it may be configured to report more transmitter circles than are actually used, so that the transmitter 605 may freely select a portion of them by taking scheduling factors into account. For example, a transmitter circle may be scheduled for some other OAM mode and / or transmission. If the number of modes used for that transmitter circle reaches the maximum capacity, the transmitter 605 may select a different transmitter circle.

[0071] As indicated by reference numeral 620, the transmitter 605 may transmit a plurality of reference signals to the receiver 610. The reference signals may correspond to a plurality of transmitter circles. In some aspects, at least one reference signal of the plurality of reference signals may correspond to an OAM mode of a corresponding transmitter circle.

[0072] As indicated by reference numeral 625, the receiver 610 may determine the proposed circle. For example, the transmitter 605 may transmit a reference signal in each mode of each transmitter circle, and the receiver 610 may estimate the channel response g for each receiver circle of each mode. m,i,j (where m is the index of the pattern, i is the index of the transmitter circle, and j is the index of the receiver circle.) In some aspects, the suggested set of transmitter circles may be based at least in part on a plurality of measured channel conditions corresponding to a plurality of reference signals.

[0073] In some aspects, for example, the receiver 610 may calculate each vector [g m,i,1 ,g m,i,2 ,…,g m,i,J The second-order norm (sum power) of ], denoted as G m,i The recommended transmitter circle can be its G m,iThe receiver 610 may select a preferred transmitter circle for each OAM set in the set of OAM modes. For example, in some aspects, the receiver 610 may select 2 transmitter circles for spatial diversity in each OAM mode (e.g., circles with radii of 0.8 meters and 0.6 meters for OAM modes -2, -1, 1, and 2; and circles with radii of 0.4 meters and 0.2 meters for OAM mode 0). In some aspects, the receiver 610 may select a transmitter circle such that the number of modes transmitted at the selected circle is no greater than.

[0074] As indicated by reference numeral 630, the receiver 610 may send and the transmitter 605 may receive a report message (which may be referred to as "message 2") indicating a recommended transmitter circle set to be used. In some aspects, the report message may indicate at least one of: a set of transmitter circle indices corresponding to the transmitter circle set, a channel state information (CSI) indicator associated with the transmitter circle set, or a parameter associated with a spatial diversity scheme. In some aspects, the CSI may include channel quality information (CQI).

[0075] As indicated by reference numeral 635, the transmitter 605 may determine the configured circle based on the proposed circle and / or scheduling considerations. As indicated by reference numeral 640, the transmitter 605 may send a configuration message (which may be referred to as "message 3") indicating the configured transmitter circle set to the receiver 610. In some aspects, the configuration message may indicate at least one of the following for at least one data stream and at least one corresponding OAM mode: an index of a transmitter circle in the configured transmitter circle set or a parameter of a spatial diversity scheme.

[0076] As indicated by reference numeral 645, the transmitter 605 may transmit at least one data stream to the receiver 610 using the configured transmitter circle set. In some aspects, the transmitter 605 may transmit at least one data stream based at least in part on transmitting a first signal using a first OAM mode of a first transmitter circle subset, wherein the first signal is associated with the first data stream; and transmitting a second signal using a second OAM mode of a second transmitter circle subset, wherein the second signal is associated with the second data stream. In some aspects, the first transmitter circle subset and the second transmitter circle subset may be fully overlapping, partially overlapping, or non-overlapping.

[0077] In some aspects, the transmitter 605 may use a spatial diversity scheme to transmit at least one data stream. The transmission format may be independent of (e.g., not affected by) channel conditions and system parameters (e.g., communication distance, Tx / Rx radius, wavelength). In some aspects, the spatial diversity scheme may include at least one of the following: space-time block coding or space-frequency block coding.

[0078] In some aspects, for example, when space-time block coding is used, the transmission signals of the transmitter circles in the selected OAM mode may be generated in the following manner: if the number of transmitter circles is two, and the data symbols are s1 and s2, then at the first timing unit, the transmission signals of the two transmitter circles are s1 and s2 respectively; and at the second timing unit, the transmission signals of the two transmitter circles are and In some aspects, for example, when space-frequency block coding is used, the transmission signals of the transmitter circles in the selected OAM mode may be generated in the following manner: if the number of transmitter circles is two, and the data symbols are s1 and s2, then at the first frequency unit, the transmission signals of the two transmitter circles are s1 and s2 respectively; and at the second frequency unit, the transmission signals of the two transmitter circles are and The use of channel-independent channel coding can achieve spatial diversity transmission without the need to receive feedback about precoding weights from the receiver 610 and / or without having to use channel-dependent precoding weights at the transmitter 605. In this manner, various aspects can reduce transmitter / receiver complexity and obtain spatial diversity gain.

[0079] As noted above, Figure 6 is provided as an example. Other examples may differ from those described above. Figure 6 Examples described.

[0080] Figure 7 is a diagram showing an example 700 associated with spatial diversity transmission in multi-circle OAM multiplexing based communications in accordance with various aspects of the present disclosure. Example 700 depicts an illustrative allocation of data streams using a transmitter circle (shown as a Tx-UCA antenna circle) at OAM modes -2, -1, 0, 1, and 2. As shown, such an array of transmitter circles can use spatial diversity to transmit multiple data streams.

[0081] As shown, for example, a first data stream ("data stream 1") may be sent using a first set of transmitter circles ("UCA circle 1" and "UCA circle 2") in OAM mode-2. A second data stream ("data stream 2") may be sent using a first set of transmitter circles in OAM mode-1, a third data stream ("data stream 3") may be sent using a first set of transmitter circles in OAM mode 1, and a fourth data stream ("data stream 4") may be sent using a first set of transmitter circles in OAM mode 2. A fifth data stream ("data stream 5") may be sent using a second set of transmitter circles ("UCA circle 3" and "UCA circle 4") in OAM mode 0.

[0082] As noted above, Figure 7is provided as an example. Other examples may differ from those described above. Figure 7 Examples described.

[0083] Figure 8 8 is a diagram illustrating an example 800 associated with spatial diversity transmission in multi-circle OAM multiplexing based communications according to various aspects of the present disclosure. Example 800 depicts the above in conjunction with Figure 6 An illustrative indication format of a configuration message (message 3) described in the figure. As shown, for example, the configuration message may include a matrix or bitmap of indices. The indices may include an OAM mode index, a transmitter circle group index, and / or a spatial diversity scheme index, among other examples.

[0084] As noted above, Figure 8 is provided as an example. Other examples may differ from those described above. Figure 8 Examples described.

[0085] Fig. 9 is a diagram illustrating an example process 900, performed, for example, by a transmitter, in accordance with various aspects of the present disclosure. Example process 900 is an example in which a transmitter (eg, transmitter 605) performs operations associated with spatial diversity in coaxial multi-circle OAM multiplexing based communications.

[0086] like Fig. 9 As shown, in some aspects, process 900 may include sending a configuration message indicating a configured transmitter circle set to a receiver of OAM multiplexing-based communication (block 910). For example, a transmitter (e.g., using Fig.12 The transmitting component 1204 depicted in FIG. 1204 may transmit a configuration message indicating a configured transmitter circle set to a receiver of OAM multiplexing-based communication, as described above.

[0087] like Fig. 9 As further shown, in some aspects, process 900 may include: using a configured transmitter circle set to transmit at least one data stream to a receiver (block 920). For example, a transmitter (e.g., using Fig.11 The transmitting component 1104 depicted in FIG. 1 can use a configured transmitter circle set to transmit at least one data stream to a receiver, as described above.

[0088] Process 900 may include additional aspects, such as any single aspect or any combination of the aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0089] In a first aspect, process 900 includes sending a status message to a receiver, the status message indicating the number of transmitter circles available.

[0090] In a second aspect, alone or in combination with the first aspect, process 900 includes sending a status message to a receiver, the status message indicating a number of transmitter circles available for each of a plurality of OAM modes.

[0091] In a third aspect, alone or in combination with one or more of the first and second aspects, process 900 includes sending a status message to a receiver indicating a maximum number of modes that can be used by an indicated transmitter circle.

[0092] In a fourth aspect, alone or in combination with one or more of the first to third aspects, process 900 includes receiving a report message from a receiver, the report message indicating a suggested set of transmitter circles to use.

[0093] In a fifth aspect, either alone or in combination with the fourth aspect, process 900 comprises sending a plurality of reference signals corresponding to a plurality of transmitter circles to a receiver, wherein at least one of the plurality of reference signals corresponds to an OAM mode of the corresponding transmitter circle, and wherein a recommended set of transmitter circles is based at least in part on a plurality of measured channel states corresponding to the plurality of reference signals.

[0094] In the sixth aspect, alone or in combination with one or more of the fourth or fifth aspects, the report message indicates at least one of: a transmitter circle index set corresponding to a transmitter circle set, a channel state information indicator associated with a transmitter circle set, or a parameter associated with a spatial diversity scheme.

[0095] In the seventh aspect, alone or in combination with one or more of the first to sixth aspects, sending at least one data stream includes: using a first OAM mode of a first transmitter circle subset to send a first signal, wherein the first signal is associated with a first data stream; and using a second OAM mode of a second transmitter circle subset to send a second signal, wherein the second signal is associated with a second data stream.

[0096] In an eighth aspect, alone or in combination with the seventh aspect, the first transmitter circle subset and the second transmitter circle subset are fully overlapping, partially overlapping, or non-overlapping.

[0097] In a ninth aspect, alone or in combination with one or more of the first to eighth aspects, transmitting at least one data stream includes: transmitting at least one data stream using a spatial diversity scheme.

[0098] In a tenth aspect, either alone or in combination with the ninth aspect, the spatial diversity scheme comprises at least one of space-time block coding or space-frequency block coding.

[0099] In the eleventh aspect, alone or in combination with one or more of the first to tenth aspects, the configuration message indicates at least one of the following items for at least one data stream and at least one corresponding OAM mode: an index of a transmitter circle in a configured transmitter circle set, or parameters of a spatial diversity scheme.

[0100] Although Fig. 9 Example blocks of process 900 are shown, but in some aspects process 900 may include Fig. 9 The blocks depicted in the process 900 may include additional blocks, fewer blocks, different blocks, or blocks arranged in a different manner than those depicted in the process 900. Additionally or alternatively, two or more blocks in the blocks of process 900 may be executed in parallel.

[0101] Fig.10 is a diagram illustrating an example process 1000, performed, for example, by a transmitter, in accordance with various aspects of the present disclosure. Example process 1000 is an example in which a receiver (eg, receiver 610) performs operations associated with spatial diversity in coaxial multi-circle OAM multiplexing based communications.

[0102] like Fig.10 As shown, in some aspects, process 1000 may include: receiving a configuration message indicating a configured transmitter circle set from a transmitter of OAM multiplexing-based communication (block 1010). For example, a receiver (e.g., using Fig.12 The receiving component 1202 depicted in FIG. 1 may receive a configuration message indicating a configured transmitter circle set from a transmitter of OAM multiplexing-based communication, as described above.

[0103] like Fig.10 As further shown, in some aspects, process 1000 may include receiving at least one data stream from a transmitter using a configured transmitter circle set (block 1020). For example, a receiver (e.g., using Fig.12 The receiving component 1202 depicted in can use a configured transmitter circle set to receive at least one data stream from a transmitter, as described above.

[0104] Process 1000 may include additional aspects, such as any single aspect or any combination of the aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0105] In a first aspect, process 1000 includes receiving a status message from a transmitter, the status message indicating a number of transmitter circles available.

[0106] In a second aspect, alone or in combination with the first aspect, process 1000 includes receiving a status message from a transmitter, the status message indicating a number of transmitter circles available for each of a plurality of OAM modes.

[0107] In a third aspect, alone or in combination with one or more of the first and second aspects, process 1000 includes receiving a status message from a transmitter indicating a maximum number of modes that can be used by an indicated transmitter circle.

[0108] In a fourth aspect, alone or in combination with one or more of the first to third aspects, the process 1000 includes sending a report message to a transmitter, the report message indicating a suggested set of transmitter circles to be used.

[0109] In a fifth aspect, either alone or in combination with the fourth aspect, process 1000 comprises receiving, from a transmitter, a plurality of reference signals corresponding to a plurality of transmitter circles, wherein at least one of the plurality of reference signals corresponds to an OAM mode of the corresponding transmitter circle, and wherein a proposed set of transmitter circles is based at least in part on a plurality of measured channel states corresponding to the plurality of reference signals.

[0110] In the sixth aspect, alone or in combination with one or more of the fourth or fifth aspects, the report message indicates at least one of: a transmitter circle index set corresponding to a transmitter circle set, a channel state information indicator associated with a transmitter circle set, or a parameter associated with a spatial diversity scheme.

[0111] In the seventh aspect, alone or in combination with one or more of the first to sixth aspects, receiving at least one data stream includes: receiving a first signal using a first OAM mode of a first transmitter circle subset, wherein the first signal is associated with a first data stream; and receiving a second signal using a second OAM mode of a second transmitter circle subset, wherein the second signal is associated with a second data stream.

[0112] In an eighth aspect, alone or in combination with the seventh aspect, the first transmitter circle subset and the second transmitter circle subset are fully overlapping, partially overlapping, or non-overlapping.

[0113] In a ninth aspect, alone or in combination with one or more of the first to eighth aspects, receiving at least one data stream comprises: receiving at least one data stream based at least in part on a spatial diversity scheme.

[0114] In a tenth aspect, either alone or in combination with the ninth aspect, the spatial diversity scheme comprises at least one of space-time block coding or space-frequency block coding.

[0115] In the eleventh aspect, alone or in combination with one or more of the first to tenth aspects, the configuration message indicates at least one of the following items for at least one data stream and at least one corresponding OAM mode: an index of a transmitter circle in a configured transmitter circle set, or parameters of a spatial diversity scheme.

[0116] Although Fig.10 Example blocks of process 1000 are shown, but in some aspects, process 1000 may include Fig.10 The blocks in process 1000 may include additional blocks, fewer blocks, different blocks, or blocks arranged in a different manner than those depicted in process 1000. Additionally or alternatively, two or more blocks in the blocks of process 1000 may be executed in parallel.

[0117] Fig.11 1 is a block diagram of an example apparatus 1100 for wireless communication. Apparatus 1100 may be a transmitter, include a transmitter, or the transmitter may include apparatus 1100. In some aspects, apparatus 1100 includes a receiving component 1102 and a transmitting component 1104, which may communicate with each other (e.g., via one or more buses and / or one or more other components). As shown, apparatus 1100 may communicate with another apparatus 1106 (such as a UE, a base station, or another wireless communication device) using receiving component 1102 and transmitting component 1104. As further shown, apparatus 1100 may include a communication manager 1108.

[0118] In some aspects, the apparatus 1100 may be configured to perform the Figure 6-8 Additionally or alternatively, the apparatus 1100 may be configured to perform one or more processes described herein, such as Fig. 9 In some aspects, Fig.11 The device 1100 and / or one or more components shown in the figure may include the above-mentioned Figure 2 Additionally or alternatively, Fig.11 One or more of the components shown in the above may be combined Figure 2 In addition or alternatively, one or more components in the component set may be at least partially implemented as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or codes stored in a non-transitory computer-readable medium and executable by a controller or processor to perform the function or operation of the component.

[0119] The receiving component 1102 may receive communications from the device 1106, such as reference signals, control information, data communications, or a combination thereof. The receiving component 1102 may provide the received communications to one or more other components of the device 1100. In some aspects, the receiving component 1102 may perform signal processing (e.g., filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, among other examples) on the received communications and may provide the processed signals to one or more other components of the device 1106. In some aspects, the receiving component 1102 may include the above in combination with Figure 2 One or more antennas, demodulators, MIMO detectors, receive processors, controllers / processors, memories, or combinations thereof of a transmitter are described.

[0120] The transmitting component 1104 may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to the device 1106. In some aspects, one or more other components of the device 1106 may generate communications and may provide the generated communications to the transmitting component 1104 for transmission to the device 1106. In some aspects, the transmitting component 1106 may perform signal processing (e.g., filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples) on the generated communications and may transmit the processed signals to the device 1106. In some aspects, the transmitting component 1104 may include the above in combination with Figure 2 One or more antennas, modulators, transmit MIMO processors, transmit processors, controllers / processors, memories, or combinations thereof of the described transmitters. In some aspects, the transmit component 1104 can be co-located with the receive component 1102 in a transceiver.

[0121] In some aspects, for example, the communication manager 1108 can be configured to process signals, make decisions, manage scheduling, and / or determine a transmitter circle to use, among other examples. In some aspects, the communication manager 1108 can include the above-mentioned Figure 2 A controller / processor, memory, or combination thereof of the transmitter described herein. In some aspects, the communications manager 1108 may include a receiving component 1102 and / or a sending component 1104.

[0122] The transmitting component 1104 may transmit a configuration message indicating a configured transmitter circle set to a receiver of OAM multiplexing-based communication. The transmitting component 1104 may transmit at least one data stream to the receiver using the configured transmitter circle set. The transmitting component 1104 may transmit a status message to the receiver indicating the number of transmitter circles available. The transmitting component 1104 may transmit a status message to the receiver indicating the number of transmitter circles available for each of a plurality of OAM modes. The transmitting component 1104 may transmit a status message to the receiver indicating a maximum number of modes that may be used by the indicated transmitter circle.

[0123] The receiving component 1102 may receive a report message from a receiver, the report message indicating a recommended set of transmitter circles to be used. The sending component 1104 may send a plurality of reference signals corresponding to the plurality of transmitter circles to the receiver, wherein at least one reference signal of the plurality of reference signals corresponds to an OAM mode of the corresponding transmitter circle, wherein the recommended set of transmitter circles is based at least in part on a plurality of measured channel states corresponding to the plurality of reference signals.

[0124] Fig.11 The number and arrangement of components shown are provided as examples. In practice, there may be Fig.11 The components shown may include additional components, fewer components, different components, or components arranged in a different manner than those shown. Fig.11 Two or more components shown may be implemented in a single component, or Fig.11 The single component shown may be implemented as multiple distributed components. Additionally or alternatively, Fig.11 A collection of (one or more) components shown may perform the operations described by Fig.11 Another component collection shown performs one or more functions.

[0125] Fig.12 1 is a block diagram of an example apparatus 1200 for wireless communication. Apparatus 1200 may be a receiver, include a receiver, or a receiver may include apparatus 1200. In some aspects, apparatus 1200 includes a receiving component 1202 and a transmitting component 1204, which may communicate with each other (e.g., via one or more buses and / or one or more other components). As shown, apparatus 1200 may communicate with another apparatus 1206 (such as a UE, a base station, or another wireless communication device) using receiving component 1202 and transmitting component 1204. As further shown, apparatus 1200 may include a communication manager 1208.

[0126] In some aspects, the apparatus 1200 may be configured to perform the Figure 6-8Additionally or alternatively, the apparatus 1200 may be configured to perform one or more processes described herein, such as Fig.10 Process 1000. In some aspects, Fig.12 The device 1200 and / or one or more components shown in the figure may include the above-mentioned combination Figure 2 Additionally or alternatively, Fig.12 One or more of the components shown in the above may be combined Figure 2 In addition or alternatively, one or more components in the component set may be at least partially implemented as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or codes stored in a non-transitory computer-readable medium and executable by a controller or processor to perform the function or operation of the component.

[0127] The receiving component 1202 may receive communications from the apparatus 1206, such as reference signals, control information, data communications, or a combination thereof. The receiving component 1202 may provide the received communications to one or more other components of the apparatus 1200. In some aspects, the receiving component 1202 may perform signal processing (e.g., filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, among other examples) on the received communications and may provide the processed signals to one or more other components of the apparatus 1206. In some aspects, the receiving component 1202 may include the above in combination with Figure 2 One or more antennas, demodulators, MIMO detectors, receive processors, controllers / processors, memories, or combinations thereof of a receiver are described.

[0128] The transmitting component 1204 may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to the device 1206. In some aspects, one or more other components of the device 1206 may generate communications and may provide the generated communications to the transmitting component 1204 for transmission to the device 1206. In some aspects, the transmitting component 1206 may perform signal processing (e.g., filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples) on the generated communications and may transmit the processed signals to the device 1206. In some aspects, the transmitting component 1204 may include the above in combination with Figure 2 One or more antennas, modulators, transmit MIMO processors, transmit processors, controllers / processors, memories, or combinations thereof of the described receivers. In some aspects, the transmit component 1204 can be co-located with the receive component 1202 in a transceiver.

[0129] In some aspects, for example, the communication manager 1208 may be configured to process signals, make decisions, manage scheduling, measure reference signals, determine CSI and / or CQI, and / or determine a recommended transmitter circle to use, among other examples. In some aspects, the communication manager 1208 may include the above in combination with Figure 2 In some aspects, the communications manager 1208 can include a receiving component 1202 and / or a sending component 1204.

[0130] The receiving component 1202 may receive a configuration message indicating a configured transmitter circle set from a transmitter of OAM multiplexing-based communication. The receiving component 1202 may receive at least one data stream from the transmitter using the configured transmitter circle set. The receiving component 1202 may receive a status message from the transmitter indicating the number of transmitter circles available. The receiving component 1202 may receive a status message from the transmitter indicating the number of transmitter circles available for each of a plurality of OAM modes.

[0131] The receiving component 1202 may receive a status message from the transmitter, the status message indicating a maximum number of modes that may be used by the indicated transmitter circle. The sending component 1204 may send a report message to the transmitter, the report message indicating a recommended set of transmitter circles to be used. The receiving component 1202 may receive a plurality of reference signals corresponding to the plurality of transmitter circles from the transmitter, wherein at least one reference signal of the plurality of reference signals corresponds to an OAM mode of the corresponding transmitter circle, and wherein the recommended set of transmitter circles is based at least in part on a plurality of measured channel states corresponding to the plurality of reference signals.

[0132] Fig.12 The number and arrangement of components shown are provided as examples. In practice, there may be Fig.12 The components shown may include additional components, fewer components, different components, or components arranged in a different manner than those shown. Fig.12 Two or more components shown may be implemented in a single component, or Fig.12 The single component shown may be implemented as multiple distributed components. Additionally or alternatively, Fig.12 A collection of (one or more) components shown may perform the operations described by Fig.12 Another component collection shown performs one or more functions.

[0133] The following provides a summary of various aspects of the disclosure:

[0134] Aspect 1: A method of wireless communication performed by a transmitter of orbital angular momentum (OAM) multiplexing-based communication, comprising: sending a configuration message indicating a configured transmitter circle set to a receiver of the OAM multiplexing-based communication; and using the configured transmitter circle set to send at least one data stream to the receiver.

[0135] Aspect 2: The method according to aspect 1 further comprises: sending a status message to the receiver, wherein the status message indicates the number of available transmitter circles.

[0136] Aspect 3: The method according to any one of aspects 1 or 2, further comprising: sending a status message to the receiver, the status message indicating the number of transmitter circles available for each of the plurality of OAM modes.

[0137] Aspect 4: The method according to any one of aspects 1-3 further comprises: sending a status message to the receiver, the status message indicating a maximum number of modes that can be used by the indicated transmitter circle.

[0138] Aspect 5: The method according to any one of aspects 1-4, further comprising: receiving a report message from the receiver, the report message indicating a recommended transmitter circle set to be used.

[0139] Aspect 6: The method according to Aspect 5 further includes: sending multiple reference signals corresponding to multiple transmitter circles to the receiver, wherein at least one reference signal among the multiple reference signals corresponds to the OAM mode of the corresponding transmitter circle, and wherein the recommended transmitter circle set is at least partially based on multiple measured channel states corresponding to the multiple reference signals.

[0140] Aspect 7: A method according to any one of Aspects 5 or 6, wherein the report message indicates at least one of the following: a transmitter circle index set corresponding to the transmitter circle set, a channel state information indicator associated with the transmitter circle set, or a parameter associated with a spatial diversity scheme.

[0141] Aspect 8: A method according to any one of Aspects 1-7, wherein sending the at least one data stream comprises: sending a first signal using a first OAM mode of a first transmitter circle subset, wherein the first signal is associated with a first data stream; and sending a second signal using a second OAM mode of a second transmitter circle subset, wherein the second signal is associated with a second data stream.

[0142] Aspect 9: The method according to aspect 8, wherein the first transmitter circle subset and the second transmitter circle subset are completely overlapping, partially overlapping or non-overlapping.

[0143] Aspect 10: The method according to any one of aspects 1-9, wherein sending the at least one data stream includes: sending the at least one data stream using a spatial diversity scheme.

[0144] Aspect 11: The method according to aspect 10, wherein the spatial diversity scheme includes at least one of the following: space-time block coding or space-frequency block coding.

[0145] Aspect 12: A method according to any one of Aspects 1-11, wherein the configuration message indicates at least one of the following items for the at least one data stream and at least one corresponding OAM mode: an index of a transmitter circle in the configured transmitter circle set, or a parameter of a spatial diversity scheme.

[0146] Aspect 13: A method of wireless communication performed by a receiver of orbital angular momentum (OAM) multiplexing-based communication, comprising: receiving a configuration message indicating a configured transmitter circle set from a transmitter of the OAM multiplexing-based communication; and using the configured transmitter circle set to receive at least one data stream from the transmitter.

[0147] Aspect 14: The method according to aspect 13 further comprises: receiving a status message from the transmitter, the status message indicating the number of available transmitter circles.

[0148] Aspect 15: The method according to any one of aspects 13 or 14, further comprising: receiving a status message from the transmitter, the status message indicating the number of transmitter circles available for each of the plurality of OAM modes.

[0149] Aspect 16: The method according to any one of aspects 13-15, further comprising: receiving a status message from the transmitter, the status message indicating a maximum number of modes that can be used by the indicated transmitter circle.

[0150] Aspect 17: The method according to any one of aspects 13-16, further comprising: sending a report message to the transmitter, the report message indicating a recommended transmitter circle set to be used.

[0151] Aspect 18: The method according to Aspect 17 further includes: receiving multiple reference signals corresponding to multiple transmitter circles from the transmitter, wherein at least one reference signal of the multiple reference signals corresponds to the OAM mode of the corresponding transmitter circle, and wherein the recommended transmitter circle set is at least partially based on multiple measured channel states corresponding to the multiple reference signals.

[0152] Aspect 19: A method according to any one of Aspects 17 or 18, wherein the report message indicates at least one of the following: a transmitter circle index set corresponding to the transmitter circle set, a channel state information indicator associated with the transmitter circle set, or a parameter associated with a spatial diversity scheme.

[0153] Aspect 20: A method according to any one of Aspects 13-19, wherein receiving the at least one data stream includes: receiving a first signal using a first OAM mode of a first transmitter circle subset, wherein the first signal is associated with a first data stream; and receiving a second signal using a second OAM mode of a second transmitter circle subset, wherein the second signal is associated with a second data stream.

[0154] Aspect 21: The method according to Aspect 20, wherein the first transmitter circle subset and the second transmitter circle subset are completely overlapping, partially overlapping or non-overlapping.

[0155] Aspect 22: The method according to any one of aspects 13-21, wherein receiving the at least one data stream includes: receiving the at least one data stream based at least in part on a spatial diversity scheme.

[0156] Aspect 23: The method according to aspect 22, wherein the spatial diversity scheme includes at least one of the following: space-time block coding or space-frequency block coding.

[0157] Aspect 24: A method according to any one of Aspects 13-23, wherein the configuration message indicates at least one of the following items for the at least one data stream and at least one corresponding OAM mode: an index of a transmitter circle in the configured transmitter circle set, or a parameter of a spatial diversity scheme.

[0158] Aspect 24: An apparatus for wireless communication at a device, comprising: a processor; a memory coupled to the processor; and instructions, the instructions being stored in the memory and executable by the processor to cause the apparatus to perform a method according to one or more of Aspects 1-12.

[0159] Aspect 25: An apparatus for wireless communication, comprising a memory and one or more processors coupled to the memory, the memory and the one or more processors being configured to perform the method according to one or more of aspects 1-12.

[0160] Aspect 26: An apparatus for wireless communication, comprising at least one unit for performing the method according to one or more of aspects 1-12.

[0161] Aspect 27: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method according to one or more of aspects 1-12.

[0162] Aspect 28: A non-transitory computer-readable medium storing an instruction set for wireless communication, the instruction set comprising one or more instructions, which when executed by one or more processors of a device causes the device to perform a method according to one or more of aspects 1-12.

[0163] Aspect 29: An apparatus for wireless communication at a device, comprising: a processor; a memory coupled to the processor; and instructions, the instructions being stored in the memory and executable by the processor to cause the apparatus to perform a method according to one or more of Aspects 13-24.

[0164] Aspect 30: An apparatus for wireless communication, comprising a memory and one or more processors coupled to the memory, the memory and the one or more processors being configured to perform the method according to one or more of aspects 13-24.

[0165] Aspect 31: An apparatus for wireless communication, comprising at least one unit for performing the method according to one or more of aspects 13-24.

[0166] Aspect 32: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method according to one or more of aspects 13-24.

[0167] Aspect 33: A non-transitory computer-readable medium storing an instruction set for wireless communication, the instruction set comprising one or more instructions, which when executed by one or more processors of a device causes the device to perform a method according to one or more of aspects 13-24.

[0168] The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations are possible in light of the above disclosure or may be acquired from practice of the various aspects.

[0169] As used herein, the term "component" is intended to be interpreted broadly as a combination of hardware and / or hardware and software. Whether referred to as software, firmware, middleware, microcode, hardware description language or other names, "software" should be interpreted broadly as meaning instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, processes and / or functions and other examples. As used herein, a processor is implemented with a combination of hardware and / or hardware and software. It will be apparent that the system and / or method described herein can be implemented with a combination of hardware and / or hardware and software in different forms. The actual special control hardware or software code for implementing these systems and / or methods is not to limit various aspects. Therefore, the operation and behavior of the system and / or method are described herein without citing a specific software code, and it is to be understood that software and hardware can be designed to implement the system and / or method based at least in part on the description herein.

[0170] As used herein, satisfying a threshold may refer to a value being greater than a threshold, greater than or equal to a threshold, less than a threshold, less than or equal to a threshold, equal to a threshold, not equal to a threshold, etc., depending on the context.

[0171] Even if the specific combination of features is recorded in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of various aspects. In fact, many features in these features can be combined in a manner that is not specifically recorded in the claims and / or specifically disclosed in the specification. Although each dependent claim listed below can only directly depend on a claim, the disclosure of various aspects includes the combination of each dependent claim and each other claim in the claim set. As used herein, the phrase of "at least one of" referring to the list of items refers to any combination of those items, including a single member. For example, "at least one of a, b or c" is intended to cover any combination of a, b, c, ab, ac, bc and abc, and with the multiple of the same element (for example, aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc and ccc or any other sorting of a, b and c).

[0172] None of the elements, actions or instructions used herein should be interpreted as key or necessary, unless clearly described as such. In addition, as used herein, the articles "a" and "an" are intended to include one or more projects, and can be used interchangeably with "one or more". In addition, as used herein, the article "the" is intended to include one or more projects quoted in conjunction with the article "the", and can be used interchangeably with "one or more". In addition, as used herein, the terms "set" and "group" are intended to include one or more projects (for example, related projects, unrelated projects, or the combination of related projects and unrelated projects), and can be used interchangeably with "one or more". In the case of only expecting a project, phrases "only one" or similar language are used. In addition, as used herein, the terms "has", "have", "having" etc. are intended to be open terms. In addition, unless otherwise clearly stated, phrase "based on" is intended to mean "based at least in part on". Furthermore, as used herein, the term "or" when used in a series is intended to be inclusive and can be used interchangeably with "and / or" unless expressly stated otherwise (eg, if used in conjunction with "either" or "only one of").

Claims

1. A transmitter for communication based on orbital angular momentum (OAM) multiplexing, comprising: Memory; as well as one or more processors operatively coupled to the memory, the memory and the one or more processors being configured to: sending a configuration message indicating a configured transmitter circle set to a receiver of the OAM multiplexing-based communication; as well as transmitting at least one data stream to the receiver using the configured transmitter circle set, Wherein, when sending the at least one data stream, the one or more processors are configured to: send the at least one data stream using a spatial diversity scheme, and wherein the spatial diversity scheme includes at least one of the following: Space-time block coding, or Space-frequency block coding.

2. The transmitter according to claim 1, wherein The one or more processors are further configured to send a status message to the receiver, the status message indicating a number of available transmitter circles.

3. The transmitter according to claim 1, wherein: The one or more processors are further configured to send a status message to the receiver, the status message indicating a number of transmitter circles available for each of a plurality of OAM modes.

4. The transmitter according to claim 1, wherein: The one or more processors are further configured to send a status message to the receiver indicating a maximum number of modes that can be used by the indicated transmitter circle.

5. The transmitter according to claim 1, wherein The one or more processors are further configured to receive a report message from the receiver, the report message indicating a suggested set of transmitter circles to use.

6. The transmitter according to claim 5, wherein: The one or more processors are further configured to: send a plurality of reference signals corresponding to a plurality of transmitter circles to the receiver, wherein at least one reference signal of the plurality of reference signals corresponds to an OAM mode of a corresponding transmitter circle, and The proposed transmitter circle set is based at least in part on a plurality of measured channel conditions corresponding to the plurality of reference signals.

7. The transmitter according to claim 5, wherein: The report message indicates at least one of the following: a set of transmitter circle indices corresponding to the transmitter circle set, a channel state information indicator associated with the transmitter circle set, or Parameters associated with space diversity schemes.

8. The transmitter according to claim 1, wherein When sending the at least one data stream, the one or more processors are configured to: transmitting a first signal using a first OAM mode of a first subset of transmitter circles, wherein the first signal is associated with a first data stream; and A second signal is transmitted using a second OAM mode of a second subset of transmitter circles, wherein the second signal is associated with a second data stream.

9. The transmitter according to claim 8, wherein: The first transmitter circle subset and the second transmitter circle subset are completely overlapping, partially overlapping, or non-overlapping.

10. The transmitter according to claim 1, wherein: The configuration message indicates at least one of the following for the at least one data flow and at least one corresponding OAM mode: the index of a transmitter circle in the configured set of transmitter circles, or Parameters of the space diversity scheme.

11. A receiver for communication based on orbital angular momentum (OAM) multiplexing, comprising: Memory; as well as one or more processors operatively coupled to the memory, the memory and the one or more processors being configured to: receiving, from a transmitter of the OAM multiplexing-based communication, a configuration message indicating a configured transmitter circle set; as well as receiving at least one data stream from said transmitter using said configured transmitter circle set, Wherein, when receiving the at least one data stream, the one or more processors are configured to: receive the at least one data stream based at least in part on a spatial diversity scheme, and wherein the spatial diversity scheme includes at least one of the following: Space-time block coding, or Space-frequency block coding.

12. The receiver according to claim 11, wherein: The one or more processors are further configured to receive a status message from the transmitter, the status message indicating a number of transmitter circles available.

13. The receiver according to claim 11, wherein: The one or more processors are further configured to receive a status message from the transmitter, the status message indicating a number of transmitter circles available for each of a plurality of OAM modes.

14. The receiver according to claim 11, wherein: The one or more processors are further configured to receive a status message from the transmitter indicating a maximum number of modes usable by the indicated transmitter circle.

15. The receiver according to claim 11, wherein: The one or more processors are further configured to send a report message to the transmitter, the report message indicating a suggested set of transmitter circles to use.

16. The receiver according to claim 15, wherein: The one or more processors are further configured to: receive a plurality of reference signals corresponding to a plurality of transmitter circles from the transmitter, wherein at least one reference signal of the plurality of reference signals corresponds to an OAM mode of a corresponding transmitter circle, and The proposed transmitter circle set is based at least in part on a plurality of measured channel conditions corresponding to the plurality of reference signals.

17. The receiver according to claim 15, wherein: The report message indicates at least one of the following: a set of transmitter circle indices corresponding to the transmitter circle set, a channel state information indicator associated with the transmitter circle set, or Parameters associated with space diversity schemes.

18. The receiver according to claim 11, wherein: When receiving the at least one data stream, the one or more processors are configured to: receiving a first signal using a first OAM mode of a first subset of transmitter circles, wherein the first signal is associated with a first data stream; and A second signal is received using a second OAM mode of a second subset of transmitter circles, wherein the second signal is associated with a second data stream.

19. The receiver according to claim 18, wherein: The first transmitter circle subset and the second transmitter circle subset are completely overlapping, partially overlapping, or non-overlapping.

20. The receiver of claim 11, wherein: The configuration message indicates at least one of the following for the at least one data flow and at least one corresponding OAM mode: the index of a transmitter circle in the configured set of transmitter circles, or Parameters of the space diversity scheme.

21. A method of wireless communication performed by a transmitter of orbital angular momentum (OAM) multiplexing based communication, comprising: sending a configuration message indicating a configured transmitter circle set to a receiver of the OAM multiplexing-based communication; as well as at least one data stream is transmitted to the receiver using the configured transmitter circle set, the transmitting using a spatial diversity scheme, and wherein the spatial diversity scheme includes at least one of the following: Space-time block coding, or Space-frequency block coding.

22. A method of wireless communication performed by a receiver of orbital angular momentum (OAM) multiplexing based communication, comprising: receiving, from a transmitter of the OAM multiplexing-based communication, a configuration message indicating a configured transmitter circle set; as well as receiving at least one data stream from the transmitter using the configured transmitter circle set, the receiving the at least one data stream being based at least in part on a spatial diversity scheme, and wherein the spatial diversity scheme comprises at least one of: Space-time block coding, or Space-frequency block coding.

23. A non-transitory computer readable medium storing a set of instructions for wireless communication, the set of instructions comprising: One or more instructions that, when executed by one or more processors of a transmitter for orbital angular momentum (OAM) multiplexing based communications, cause the transmitter to: sending a configuration message indicating a configured transmitter circle set to a receiver of the OAM multiplexing-based communication; as well as transmitting at least one data stream to the receiver using the configured transmitter circle set, wherein the one or more instructions that cause the transmitter to transmit the at least one data stream, when executed by the one or more processors, further cause the transmitter to transmit the at least one data stream using a spatial diversity scheme, and wherein the spatial diversity scheme comprises at least one of the following: Space-time block coding, or Space-frequency block coding.

24. A non-transitory computer readable medium storing a set of instructions for wireless communication, the set of instructions comprising: One or more instructions that, when executed by one or more processors of a receiver for orbital angular momentum (OAM) multiplexing-based communications, cause the receiver to: receiving, from a transmitter of the OAM multiplexing-based communication, a configuration message indicating a configured transmitter circle set; as well as receiving at least one data stream from said transmitter using said configured transmitter circle set, wherein the one or more instructions that cause the receiver to receive the at least one data stream, when executed by the one or more processors, further cause the receiver to receive the at least one data stream based at least in part on a spatial diversity scheme, and wherein the spatial diversity scheme comprises at least one of: Space-time block coding, or Space-frequency block coding.

25. An apparatus for communication based on orbital angular momentum (OAM) multiplexing, comprising: means for sending a configuration message indicating a configured transmitter circle set to a receiver of the OAM multiplexing-based communication; as well as means for transmitting at least one data stream to the receiver using the configured set of transmitter circles, Wherein, the means for transmitting the at least one data stream further comprises means for transmitting the at least one data stream using a spatial diversity scheme, and wherein the spatial diversity scheme comprises at least one of the following: Space-time block coding, or Space-frequency block coding.

26. An apparatus for communication based on orbital angular momentum (OAM) multiplexing, comprising: means for receiving, from a transmitter of said OAM multiplexing-based communication, a configuration message indicating a configured transmitter circle set; as well as means for receiving at least one data stream from said transmitter using said configured transmitter circle set, wherein the means for receiving the at least one data stream further comprises means for receiving the at least one data stream based at least in part on a spatial diversity scheme, and wherein the spatial diversity scheme comprises at least one of: Space-time block coding, or Space-frequency block coding.

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