Cyclic prefix orthogonal frequency division multiplexing compatible digital chirp

Abstract

Aspects of the present disclosure generally relate to wireless communications. In some aspects, a wireless communication device may generate a chirp signal associated with performing radio frequency (RF) sensing, where the chirp signal has a waveform compatible with a cyclic prefix (CP) orthogonal frequency division multiplexing (OFDM) waveform for communication. The wireless communication device may transmit the chirp signal in association with performing RF sensing. Numerous other aspects are described.

Description

Technical Field

[0001] Aspects of the present disclosure relate generally to wireless communications, and to techniques and apparatus for cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) compatible digital chirping. Background Art

[0002] Wireless communication systems are widely deployed to provide a variety of 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 promulgated by the Third Generation Partnership Project (3GPP).

[0003] A wireless network may include one or more network nodes that support communications for wireless communication devices, such as user equipment (UE) or multiple UEs. A UE may communicate with a network node via downlink communications and uplink communications. A "downlink" (or "DL") refers to a communication link from a network node to a UE, and an "uplink" (or "UL") refers to a communication link from a UE to a network node. Some wireless networks may support device-to-device communications, such as via a local link (e.g., a side link (SL), a wireless local area network (WLAN) link, and / or a wireless personal area network (WPAN) link, etc.).

[0004] The above-mentioned multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different UEs to communicate at a city, country, region and / or global level. New Radio (NR) (which may be referred to as 5G) is a set of enhancements to the LTE mobile standard promulgated by 3GPP. NR is designed to better support mobile broadband Internet access 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, CP-OFDM and / or single carrier frequency division multiplexing (SC-FDM) (also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink to better integrate with other open standards; and supporting beamforming, multiple input multiple output (MIMO) antenna technology and carrier aggregation. As the demand for mobile broadband access continues to increase, further improvements in LTE, NR and other radio access technologies remain useful. 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 illustrated 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 to be considered as limiting the scope thereof, as the specification may admit of 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 according to the present disclosure.

[0007] Figure 2 is a diagram illustrating an example of communication between a network node and a user equipment (UE) in a wireless network according to the present disclosure.

[0008] Figure 3 is a diagram illustrating an example decomposed base station architecture according to the present disclosure.

[0009] 4A to 4F is a diagram illustrating an example associated with digital chirp compatible with cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) according to the present disclosure.

[0010] Figure 5A and Figure 5B is a diagram illustrating an example in which a chirp signal having a CP-OFDM compatible waveform as described herein may be generated in a digital domain according to the present disclosure.

[0011] Figure 6 is a diagram illustrating an example process performed, for example, by a wireless communication device according to the present disclosure.

[0012] Figure 7 is a diagram of an example apparatus for wireless communications according to the present disclosure. Summary of the invention

[0013] Some aspects described herein relate to a method of wireless communication performed by a wireless communication device. The method may include generating a chirp signal associated with performing radio frequency (RF) sensing, wherein the chirp signal has a waveform compatible with a cyclic prefix (CP) orthogonal frequency division multiplexing (OFDM) waveform used for communication. The method may include sending the chirp signal associated with performing RF sensing.

[0014] Some aspects described herein relate to a wireless communication device for wireless communication. The wireless communication device may include a memory and one or more processors coupled to the memory. The one or more processors may be configured to generate a chirp signal associated with performing RF sensing, wherein the chirp signal has a waveform compatible with a CP-OFDM waveform for communication. The one or more processors may be configured to send a chirp signal associated with performing RF sensing.

[0015] Some aspects described herein relate to a non-transitory computer-readable medium storing an instruction set for wireless communication by a wireless communication device. The instruction set, when executed by one or more processors of the wireless communication device, may cause the wireless communication device to generate a chirp signal associated with performing RF sensing, wherein the chirp signal has a waveform compatible with a CP-OFDM waveform used for communication. The instruction set, when executed by one or more processors of the wireless communication device, may cause the wireless communication device to send a chirp signal associated with performing RF sensing.

[0016] Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include means for generating a chirp signal associated with performing RF sensing, wherein the chirp signal has a waveform compatible with a CP-OFDM waveform for communication. The apparatus may include means for transmitting the chirp signal associated with performing RF sensing.

[0017] The various aspects generally include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, network entities, network nodes, wireless communication devices and / or processing systems as fully described herein with reference to the drawings and description and as illustrated in the drawings and description.

[0018] The features and technical advantages of examples according to the present disclosure have been outlined quite broadly above so that the following specific embodiments may be better understood. Additional features and advantages will be described below. The disclosed concepts and specific examples may be easily used as a basis for modifying or designing other structures for achieving the same purpose of the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The characteristics of the concepts disclosed herein, both in terms of their organization and method of operation, and the associated advantages will be better understood by considering the following description in conjunction with the accompanying drawings. Each of the figures in the accompanying drawings is provided for the purpose of illustration and description and not as a definition of limitations to the claims.

[0019] Although various aspects are described in the present disclosure by illustrating some examples, it will be understood by those skilled in the art that such aspects can be implemented in many different arrangements and scenarios. The technology described herein can be implemented using different platform types, devices, systems, shapes, sizes and / or packaging arrangements. For example, some aspects can be implemented via integrated chip implementations or other devices based on non-module components (e.g., end-user devices, vehicles, communication equipment, computing equipment, industrial equipment, retail / shopping equipment, medical equipment, and / or artificial intelligence devices). Various aspects can be implemented in chip-level components, modular components, non-modular components, non-chip-level components, device-level components and / or system-level components. The equipment incorporating the various aspects and features described may include additional components and features for implementing and practicing the various aspects claimed and described. For example, the transmission and reception of wireless signals may include one or more components (e.g., hardware components, including antennas, radio frequency (RF) chains, power amplifiers, modulators, buffers, processors, interleavers, adders and / or summers) for analog and digital purposes. The various aspects described herein are intended to be practiced in various devices, components, systems, distributed arrangements and / or end-user devices of various sizes, shapes and configurations. DETAILED DESCRIPTION

[0020] The various aspects of the present disclosure are described more fully below 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. On the contrary, 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. 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 it is implemented independently or in combination with any other aspect of the present disclosure. For example, any number of aspects set forth herein may be used to implement a device or practice method. In addition, the scope of the present disclosure is intended to cover such devices or methods implemented using other structures, functionality, or structures and functionality in addition to or different from the various aspects of the disclosure set forth herein. It should be understood that any aspect of the disclosure disclosed herein may be embodied by one or more elements of the claims.

[0021] 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 can be implemented using hardware, software, or a combination thereof. Whether these elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0022] Although various aspects may be described herein using terms generally associated with 5G or new radio (NR) radio access technology (RAT), various aspects of the present disclosure may be applied to other RATs, such as 3G RAT, 4G RAT, and / or post-5G RATs (e.g., 6G).

[0023] Figure 1 1 is a diagram illustrating an example of a wireless network 100 according to the present disclosure. The wireless network 100 may be a 5G (e.g., NR) network and / or a 4G (e.g., Long Term Evolution (LTE)) network, or may include elements of a 5G (e.g., NR) network and / or elements of a 4G (e.g., Long Term Evolution (LTE)) network, etc. The wireless network 100 may include one or more network nodes 110 (shown as network node 110a, network node 110b, network node 110c, and network node 110d), user equipment (UE) 120 or multiple UEs 120 (shown as UE 120a, UE 120b, UE 120c, UE 120d, and UE 120e), and / or other entities. The network node 110 is a network node that communicates with the UE 120. As shown in the figure, the network node 110 may include one or more network nodes. For example, the network node 110 may be a converged network node, which means that the converged network node is configured to utilize a radio protocol stack that is physically or logically integrated within a single radio access network (RAN) node (e.g., within a single device or unit). For another example, the network node 110 may be a decomposed network node (sometimes referred to as a decomposed base station), which means that the network node 110 is configured to utilize a protocol stack that is physically or logically distributed between two or more nodes (such as one or more central units (CUs), one or more distributed units (DUs), or one or more radio units (RUs)).

[0024] In some examples, the network node 110 is or includes a network node that communicates with the UE 120 via a radio access link, such as an RU. In some examples, the network node 110 is or includes a network node that communicates with other network nodes 110 via a fronthaul link or a midhaul link, such as a DU. In some examples, the network node 110 is or includes a network node that communicates with other network nodes 110 via a midhaul link or communicates with the core network via a backhaul link, such as a CU. In some examples, the network node 110 (such as an aggregated network node 110 or a decomposed network node 110) may include multiple network nodes, such as one or more RUs, one or more CUs, and / or one or more DUs. The network node 110 may include, for example, an NR base station, an LTE base station, a Node B, an eNB (e.g., in 4G), a gNB (e.g., in 5G), an access point, a transmit receive point (TRP), a DU, a RU, a CU, a mobility element of a network, a core network node, a network element, a network equipment, a RAN node, or a combination thereof. In some examples, network nodes 110 may be interconnected to each other or to one or more other network nodes 110 in wireless network 100 via various types of fronthaul, midhaul, and / or backhaul interfaces (such as direct physical connections, air interfaces, or virtual networks) using any suitable transport network.

[0025] In some examples, the network node 110 may provide communication coverage for a particular geographic area. In the Third Generation Partnership Project (3GPP), the term "cell" may refer to the coverage area of ​​the network node 110 and / or the network node subsystem serving the coverage area, depending on the context in which the term is used. The network node 110 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., a radius of several kilometers) and may allow unrestricted access by a UE 120 with a service subscription. A pico cell may cover a relatively small geographic area and may allow unrestricted access by a UE 120 with a service subscription. A femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by a UE 120 associated with a femto cell (e.g., a UE 120 in a closed subscriber group (CSG)). A network node 110 for a macro cell may be referred to as a macro network node. A network node 110 for a pico cell may be referred to as a pico network node. The network node 110 for a femto cell may be referred to as a femto network node or a home network node. Figure 1In the example shown, network node 110a may be a macro network node for macro cell 102a, network node 110b may be a pico network node for pico cell 102b, and network node 110c may be a femto network node for femto cell 102c. A network node may support one or more (e.g., three) cells. In some examples, a cell may not necessarily be stationary, and the geographic area of ​​a cell may move depending on the location of a mobile network node 110 (e.g., a mobile network node).

[0026] In some aspects, the term "base station" or "network node" may refer to an aggregated base station, a decomposed base station, an integrated access and backhaul (IAB) node, a relay node, or one or more components thereof. For example, in some aspects, a "base station" or "network node" may refer to a CU, a DU, a RU, a near real-time (near RT) RAN intelligent controller (RIC), or a non-real-time (non-RT) RIC, or a combination thereof. In some aspects, the term "base station" or "network node" may refer to a device configured to perform one or more functions (such as those described herein in conjunction with the network node 110). In some aspects, the term "base station" or "network node" may refer to a plurality of devices configured to perform one or more functions. For example, in some distributed systems, each of a number of different devices (which may be located in the same geographic location or in different geographic locations) may be configured to perform at least a portion of a function, or to repeat the execution of at least a portion of the function, and the term "base station" or "network node" may refer to any one or more of these different devices. In some aspects, the term "base station" or "network node" may refer to one or more virtual base stations or one or more virtual base station functions. For example, in some aspects, two or more base station functions may be instantiated on a single device. In some aspects, the term "base station" or "network node" may refer to one of the base station functions, but not another base station function. In this way, a single device may include more than one base station.

[0027] The wireless network 100 may include one or more relay stations. A relay station is a network node that can receive transmissions of data from an upstream node (e.g., a network node 110 or a UE 120) and transmit transmissions of data to a downstream node (e.g., a UE 120 or a network node 110). A relay station may be a UE 120 that is capable of relaying transmissions for other UEs 120. Figure 1 In the example shown, a network node 110d (e.g., a relay network node) may communicate with a network node 110a (e.g., a macro network node) and a UE 120d to facilitate communication between the network node 110a and the UE 120d. A network node 110 that relays communications may be referred to as a relay station, a relay base station, a relay network node, a relay node, a relay, etc.

[0028] The wireless network 100 may be a heterogeneous network that includes different types of network nodes 110, such as macro network nodes, pico network nodes, femto network nodes, relay network nodes, etc. These different types of network nodes 110 may have different transmit power levels, different coverage areas, and / or different impacts on interference in the wireless network 100. For example, a macro network node may have a high transmit power level (e.g., 5 watts to 40 watts), while a pico network node, a femto network node, and a relay network node may have a lower transmit power level (e.g., 0.1 watt to 2 watts).

[0029] The network controller 130 may be coupled to or in communication with a set of network nodes 110 and may provide coordination and control for the network nodes 110. The network controller 130 may communicate with the network nodes 110 via a backhaul communication link or a midhaul communication link. The network nodes 110 may also communicate directly with each other or indirectly via a wireless backhaul communication link or a wired backhaul communication link. In some aspects, the network controller 130 may be or may include a CU or a core network device.

[0030] UE 120 can be distributed throughout the wireless network 100, and each UE 120 can be stationary or mobile. UE 120 can include, for example, an access terminal, a terminal, a mobile station and / or a subscriber unit. UE 120 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 computer, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device, a biometric device, a wearable device (e.g., a smart watch, smart clothing, smart glasses, a smart wristband, smart jewelry (e.g., a smart ring or a smart bracelet)), an entertainment device (e.g., a music device, a video device and / or a satellite radio), a vehicle component or sensor, a smart meter / sensor, an industrial manufacturing equipment, a global positioning system device, a UE function of a network node and / or any other suitable device configured to communicate via a wireless or wired medium.

[0031] Some UEs 120 may be considered as machine type communication (MTC) or evolved or enhanced machine type communication (eMTC) UEs. MTC UEs and / or eMTC UEs may include, for example, robots, drones, remote devices, sensors, meters, monitors, and / or location tags that may communicate with a network node, another device (e.g., a remote device), or some other entity. Some UEs 120 may be considered as Internet of Things (IoT) devices and / or may be implemented as NB-IoT (narrowband IoT) devices. Some UEs 120 may be considered as customer premises equipment. 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 examples, the processor component and the 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.

[0032] In general, any number of wireless networks 100 may be deployed in a given geographic area. Each wireless network 100 may support a specific RAT and may operate on one or more frequencies. RAT may be referred to as a radio technology, air interface, etc. Frequency may be referred to as a carrier, frequency channel, etc. Each frequency may 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 may be deployed.

[0033] In some examples, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly (e.g., without using network node 110 as an intermediary to communicate with each other) using one or more side link channels. For example, UE 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., which may include vehicle-to-vehicle (V2V) protocols, vehicle-to-infrastructure (V2I) protocols, or vehicle-to-pedestrian (V2P) protocols), and / or mesh networks. In such examples, UE 120 may perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by network node 110.

[0034] The devices of the wireless network 100 may communicate using an electromagnetic spectrum that may be subdivided into various categories, bands, channels, etc., based on frequency or wavelength. For example, the devices of the wireless network 100 may communicate using one or more operating bands. In 5G NR, two initial operating bands have been identified as frequency ranges designated FR1 (410 MHz-7.125 GHz) and FR2 (24.25 GHz-52.6 GHz). It should be understood that, although a portion of FR1 is greater than 6 GHz, FR1 is often (interchangeably) referred to as the "below 6 GHz" band in various documents and articles. Similar naming issues sometimes occur with respect to FR2, which is often (interchangeably) referred to as the "millimeter wave" band in documents and articles, although different from the extremely high frequency (EHF) band (30 GHz-300 GHz) identified as the "millimeter wave" band by the International Telecommunication Union (ITU).

[0035] Frequencies between FR1 and FR2 are generally referred to as mid-band frequencies. Recent 5G NR research has identified the operating bands for these mid-band frequencies as frequency range designation FR3 (7.125GHz-24.25GHz). The bands falling within FR3 can inherit FR1 characteristics and / or FR2 characteristics, so the features of FR1 and / or FR2 can be effectively extended to mid-band frequencies. In addition, higher frequency bands are currently being explored to extend 5G NR operations to more than 52.6GHz. For example, three higher operating bands have been identified as frequency range designations FR4a or FR4-1 (52.6GHz-71GHz), FR4 (52.6GHz-114.25GHz) and FR5 (114.25GHz-300GHz). Each of these higher frequency bands falls within the EHF band.

[0036] In view of the above examples, unless otherwise specifically stated, it should be understood that if the term "below 6 GHz" or the like is used herein, the term can be broadly referred to as frequencies that can be lower than 6 GHz, can be within FR1, or can include mid-band frequencies. In addition, unless otherwise specifically stated, it should be understood that if the term "millimeter wave" or the like is used herein, the term can be broadly referred to as frequencies that can include mid-band frequencies, can be within FR2, FR4, FR4-a or FR4-1 and / or FR5, or can be within the EHF band. It is contemplated that the frequencies included in these operating bands (e.g., FR1, FR2, FR3, FR4, FR4-a, FR4-1, and / or FR5) can be modified, and the techniques described herein are applicable to those modified frequency ranges.

[0037] In some aspects, a wireless communication device may include a communication manager 140 (e.g., network node 110 may include communication manager 150, UE 120 may include communication manager 140). As described in more detail elsewhere herein, a communication manager (e.g., communication manager 140, communication manager 150) may perform the following operations: generating a chirp signal associated with performing RF sensing, wherein the chirp signal has a waveform compatible with a CP-OFDM waveform used for communication; and transmitting the chirp signal associated with performing RF sensing. Additionally or alternatively, the communication manager may perform one or more other operations described herein.

[0038] As indicated above, Figure 1 are provided as examples. Other examples can be found in the Figure 1 The examples described are different.

[0039] Figure 2 2 is a diagram illustrating an example 200 of a network node 110 communicating with a UE 120 in a wireless network 100 according to the present disclosure. The network node 110 may be equipped with a set of antennas 234a to 234t, such as T antennas (T≥1). The UE 120 may be equipped with a set of antennas 252a to 252r, such as R antennas (R≥1). The network node 110 of example 200 includes one or more radio frequency components, such as an antenna 234 and a modem 254. In some examples, the network node 110 may include an interface, a communication component, or another component that facilitates communication with the UE 120 or another network node. Some network nodes 110 may not include a radio frequency component that facilitates direct communication with the UE 120, such as one or more CUs or one or more DUs.

[0040] At the network node 110, the transmit processor 220 may receive data intended for the UE 120 (or a set of UEs 120) from the data source 212. The transmit processor 220 may select one or more modulation and coding schemes (MCS) for the UE 120 based at least in part on one or more channel quality indicators (CQI) received from the UE 120. The network node 110 may process (e.g., encode and modulate) the data for the UE 120 based at least in part on the MCS selected for the UE 120, and may provide data symbols for the UE 120. The transmit processor 220 may process system information (e.g., for semi-static resource allocation 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 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)). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., pre-decoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols, where applicable, and may provide a set of output symbol streams (e.g., T output symbol streams) to a corresponding set of modems 232 (e.g., T modems) (shown as modems 232a to 232t). For example, each output symbol stream may be provided to a modulator component (shown as MOD) of the modem 232. Each modem 232 may process a corresponding output symbol stream (e.g., for OFDM) using a corresponding modulator component to obtain an output sample stream. Each modem 232 may also process the output sample stream (e.g., convert to analog, amplify, filter, and / or up-convert) using a corresponding modulator component to obtain a downlink signal. The modems 232a to 232t may transmit a set of downlink signals (e.g., T downlink signals) via a set of corresponding antennas 234 (e.g., T antennas) (shown as antennas 234a to 234t).

[0041] At the UE 120, a set of antennas 252 (shown as antennas 252a to 252r) may receive downlink signals from the network node 110 and / or other network nodes 110 and may provide a set of received signals (e.g., R received signals) to a set of modems 254 (e.g., R modems) (shown as modems 254a to 254r). For example, each received signal may be provided to a demodulator component (shown as DEMOD) of the modem 254. Each modem 254 may use a corresponding demodulator component to condition (e.g., filter, amplify, downconvert, and / or digitize) the received signal to obtain input samples. Each modem 254 may use a demodulator component to further process the input samples (e.g., for OFDM) to obtain received symbols. A MIMO detector 256 may obtain received symbols from the modem 254, may perform MIMO detection on the received symbols where applicable, and may provide detected symbols. The receive processor 258 may process (e.g., demodulate and decode) the detected symbols, may provide decoded data for the UE 120 to the data sink 260, and may provide decoded control information and system information to the 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 CQI parameter, among other things. In some examples, one or more components of the UE 120 may be included in the housing 284.

[0042] 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 network node 110 via the communication unit 294.

[0043] One or more antennas (e.g., antennas 234a to 234t and / or antennas 252a to 252r) may include, or may be included within, one or more antenna panels, one or more antenna groups, one or more groups of antenna elements, and / or one or more antenna arrays, etc. An antenna panel, an antenna group, a group of antenna elements, and / or an antenna array may include one or more antenna elements (in a single housing or multiple housings), a group of coplanar antenna elements, a group of non-coplanar antenna elements, and / or may be coupled to one or more transmit and / or receive components (such as, Figure 2 One or more antenna elements of one or more components).

[0044] On the uplink, at the UE 120, the transmit processor 264 may receive and process data from the data source 262 and control information from the controller / processor 280 (e.g., for reports including RSRP, RSSI, RSRQ, and / or CQI). The transmit processor 264 may generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be pre-decoded by the TX MIMO processor 266, where applicable, further processed by the modem 254 (e.g., for DFT-s-OFDM or CP-OFDM), and sent to the network node 110. In some examples, the modem 254 of the UE 120 may include a modulator and a demodulator. In some examples, the UE 120 includes a transceiver. The transceiver may include any combination of an antenna 252, a modem 254, a MIMO detector 256, a receive processor 258, a transmit processor 264, and / or a TX MIMO processor 266. The transceiver may be used by a processor (eg, controller / processor 280) and memory 282 to perform the functions described herein (eg, reference FIG. 4A to FIG. 7 ) or any aspect of any of the methods described herein.

[0045] At the network node 110, uplink signals from the UE 120 and / or other UEs may be received by the antenna 234, processed by the modem 232 (e.g., a demodulator component (shown as DEMOD) of the modem 232), detected by the MIMO detector 236 (where applicable), and further processed by the receive processor 238 to obtain decoded data and control information transmitted by the UE 120. The receive processor 238 may provide the decoded data to the data sink 239 and the decoded control information to the controller / processor 240. The network node 110 may include a communication unit 244 and may communicate with the network controller 130 via the communication unit 244. The network node 110 may include a scheduler 246 to schedule one or more UEs 120 for downlink communication and / or uplink communication. In some examples, the modem 232 of the network node 110 may include a modulator and a demodulator. In some examples, the network node 110 includes a transceiver. The transceiver may include any combination of antenna 234, modem 232, MIMO detector 236, receive processor 238, transmit processor 220, and / or TX MIMO processor 230. The transceiver may be used by a processor (e.g., controller / processor 240) and memory 242 to perform operations described herein (e.g., with reference to FIG. 4A to FIG. 7 ) or any aspect of any of the methods described herein.

[0046] The controller / processor 240 of the network node 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other component in the may perform one or more techniques associated with CP-OFDM compatible digital chirping, as described in more detail elsewhere herein. For example, the controller / processor 240 of the network node 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other component that can execute or guide e.g. Figure 6 600 and / or operations of other processes as described herein. Memory 242 and memory 282 may store data and program codes for network node 110 and UE 120, respectively. In some examples, 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, the one or more instructions, when executed by one or more processors of network node 110 and / or UE 120 (e.g., directly executed, or executed after compilation, conversion, and / or interpretation), may cause the one or more processors, UE 120, and / or network node 110 to execute or direct, for example Figure 6 The process 600 and / or operations of other processes as described herein. In some examples, executing instructions may include running instructions, converting instructions, compiling instructions, and / or interpreting instructions, etc.

[0047] In some aspects, a wireless communication device (e.g., network node 110, UE 120) includes: a component for generating a chirp signal associated with performing RF sensing, wherein the chirp signal has a waveform compatible with a CP-OFDM waveform used for communication; and / or a component for transmitting the chirp signal associated with performing RF sensing. In some aspects, when the wireless communication device is a network node 110, the components for the wireless communication device to perform the operations described herein may include, for example, one or more of the communication manager 150, the transmit processor 220, the TX MIMO processor 230, the modem 232, the antenna 234, the MIMO detector 236, the receive processor 238, the controller / processor 240, the memory 242, or the scheduler 246. In some aspects, when the wireless communication device is a network node 120, the components for the wireless communication device to perform the operations described herein may include, for example, one or more of the communication manager 140, the antenna 252, the modem 254, the MIMO detector 256, the receive processor 258, the transmit processor 264, the TX MIMO processor 266, the controller / processor 280, or the memory 282.

[0048] Although Figure 2The blocks in the 2000 and 2010 are illustrated as distinct components, but the functionality described above for these blocks may be implemented in a single hardware, software, or combined component or in various combinations of components. For example, the functionality described for 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.

[0049] As indicated above, Figure 2 are provided as examples. Other examples can be found in the Figure 2 The examples described are different.

[0050] The deployment of a communication system (such as a 5G NR system) can be arranged with various components or components in a variety of ways. In a 5G NR system or network, a network node, a network entity, a mobility element of a network, a RAN node, a core network node, a network element, a base station or network equipment can be implemented in an aggregated or decomposed architecture. For example, a base station (such as a node B (NB), an evolved NB (eNB), an NR BS, a 5G NB, an access point (AP), a TRP or a cell, etc.) or one or more units (or one or more components) that perform base station functionality can be implemented as an aggregated base station (also called an independent base station or a monolithic base station) or a decomposed base station. A "network entity" or a "network node" may refer to a decomposed base station or one or more units of a decomposed base station (such as one or more CUs, one or more DUs, one or more RUs, or a combination thereof).

[0051] An aggregated base station (e.g., an aggregated network node) can be configured to utilize a radio protocol stack that is physically or logically integrated within a single RAN node (e.g., within a single device or unit). A decomposed base station (e.g., a decomposed network node) can be configured to utilize a protocol stack that is physically or logically distributed between two or more units (such as one or more CUs, one or more DUs, or one or more RUs). In some examples, the CU can be implemented within a network node, and one or more DUs can be co-located with the CU, or alternatively, can be geographically or virtually distributed across one or more other network nodes. The DU can be implemented to communicate with one or more RUs. Each of the CU, DU, and RU can also be implemented as a virtual unit, such as a virtual central unit (VCU), a virtual distributed unit (VDU), or a virtual radio unit (VRU), and the like.

[0052] Base station type operations or network designs may take into account the aggregated nature of base station functionality. For example, a decomposed base station may be utilized in an IAB network, an open radio access network (O-RAN (such as a network configuration initiated by the O-RAN Alliance)), or a virtualized radio access network (vRAN, also known as a cloud radio access network (C-RAN)) to facilitate the scaling of a communication system by separating base station functionality into one or more units that can be deployed separately. A decomposed base station may include functionality implemented across two or more units at various physical locations, as well as functionality implemented virtually for at least one unit, which may enable flexibility in network design. Individual units of a decomposed base station may be configured for wired or wireless communication with at least one other unit of the decomposed base station.

[0053] Figure 3 3 is a diagram illustrating an example disaggregated base station architecture 300 according to the present disclosure. The disaggregated base station architecture 300 may include a CU 310 that may communicate directly with a core network 320 via a backhaul link, or indirectly with the core network 320 through one or more disaggregated control units, such as a near-RT RIC 325 via an E2 link, or a non-RT RIC 315 associated with a service management and orchestration (SMO) framework 305, or both. The CU 310 may communicate with one or more DUs 330 via respective midhaul links, such as via an F1 interface. Each of the DUs 330 may communicate with one or more RUs 340 via respective fronthaul links. Each of the RUs 340 may communicate with one or more UEs 120 via respective radio frequency (RF) access links. In some implementations, a UE 120 may be served simultaneously by multiple RUs 340.

[0054] Each of the units (including CU 310, DU 330, RU 340) and the near-RT RIC 325, non-RT RIC 315, and SMO framework 305 may include or be coupled to one or more interfaces, the one or more interfaces being configured to receive or send signals, data, or information (collectively referred to as signals) via a wired or wireless transmission medium. Each of the units or an associated processor or controller that provides instructions to one or more communication interfaces of the corresponding unit may be configured to communicate with one or more of the other units via a transmission medium. In some examples, each of the units may include a wired interface and a wireless interface, the wired interface being configured to receive signals or send signals to one or more of the other units via a wired transmission medium, the wireless interface being configured to receive signals or send signals to one or more of the other units via a wired transmission medium, or both.

[0055] In some aspects, CU 310 may host one or more higher layer control functions. Such control functions may include radio resource control (RRC) functions, packet data convergence protocol (PDCP) functions, or service data adaptation protocol (SDAP) functions, etc. Each control function may be implemented using an interface that is configured to communicate signals with other control functions hosted by CU 310. CU 310 may be configured to handle user plane functionality (e.g., central unit-user plane (CU-UP) functionality), control plane functionality (e.g., central unit-control plane (CU-CP) functionality), or a combination thereof. In some specific implementations, CU 310 may be logically divided into one or more CU-UP units and one or more CU-CP units. When implemented in an O-RAN configuration, the CU-UP unit may communicate bidirectionally with the CU-CP unit via an interface (such as an E1 interface). As needed, CU310 may be implemented to communicate with DU 330 for network control and signaling.

[0056] Each DU 330 may correspond to a logical unit that includes one or more base station functions for controlling the operation of one or more RUs 340. In some aspects, the DU 330 may host one or more of a radio link control (RLC) layer, a MAC layer, and one or more high physical (PHY) layers, at least in part, according to a functional partitioning (such as that defined by 3GPP). In some aspects, one or more high PHY layers may be implemented by one or more modules for forward error correction (FEC) encoding and decoding, scrambling, modulation and demodulation, etc. In some aspects, the DU 330 may also host one or more low PHY layers, such as one or more modules for fast Fourier transform (FFT), inverse FFT (iFFT), digital beamforming or physical random access channel (PRACH) extraction and filtering, etc. Each layer (which may also be referred to as a module) may be implemented using an interface that is configured to communicate signals with other layers (and modules) hosted by the DU 330 or with control functions hosted by the CU 310.

[0057] Each RU 340 may implement lower layer functionality. In some deployments, the RU 340 controlled by the DU 330 may correspond to a logical node that hosts RF processing functions or low PHY layer functions based on functional split (e.g., functional split defined by 3GPP) (such as lower layer functional split), such as performing FFT, performing iFFT, digital beamforming, or PRACH extraction and filtering, etc. In this architecture, each RU 340 may be operated to handle over-the-air (OTA) communications with one or more UEs 120. In some specific implementations, real-time and non-real-time aspects of control plane communications and user plane communications with the RU 340 may be controlled by the corresponding DU 330. In some scenarios, this configuration may enable each DU 330 and CU 310 to be implemented in a cloud-based RAN architecture (such as a vRAN architecture).

[0058] The SMO framework 305 may be configured to support RAN deployment and provisioning of non-virtualized network elements and virtualized network elements. For non-virtualized network elements, the SMO framework 305 may be configured to support the deployment of dedicated physical resources for RAN coverage requirements, which may be managed via an operation and maintenance interface (such as an O1 interface). For virtualized network elements, the SMO framework 305 may be configured to interact with a cloud computing platform (such as an open cloud (O-Cloud) platform 390) to perform network element lifecycle management (such as instantiating virtualized network elements) via a cloud computing platform interface (such as an O2 interface). Such virtualized network elements may include, but are not limited to, CU 310, DU 330, RU 340, non-RT RIC 315, and near-RTRIC 325. In some specific implementations, the SMO framework 305 may communicate with hardware aspects of the 4G RAN (such as an open eNB (O-eNB) 311) via the O1 interface. Additionally, in some implementations, the SMO framework 305 can communicate directly with each of the one or more RUs 340 via a corresponding O1 interface. The SMO framework 305 can also include a non-RT RIC 315 configured to support the functionality of the SMO framework 305.

[0059] The non-RT RIC 315 may be configured to include logic functions that enable non-real-time control and optimization of RAN elements and resources, artificial intelligence / machine learning (AI / ML) workflows including model training and updating, or policy-based guidance of applications / features in the near-RT RIC 325. The non-RT RIC 315 may be coupled to or in communication with the near-RT RIC 325 (such as via an A1 interface). The near-RT RIC 325 may be configured to include logic functions that enable near-real-time control and optimization of RAN elements and resources via data collection and actions through an interface (such as via an E2 interface) that connects one or more CUs 310, one or more DUs 330, or both, and the O-eNB with the near-RT RIC 325.

[0060] In some implementations, in order to generate an AI / ML model to be deployed in the near-RT RIC 325, the non-RT RIC 315 may receive parameters or external enrichment information from an external server. Such information may be utilized by the near-RT RIC 325 and may be received from a non-network data source or from a network function at the SMO framework 305 or the non-RT RIC 315. In some examples, the non-RT RIC 315 or the near-RT RIC 325 may be configured to tune RAN behavior or performance. For example, the non-RT RIC 315 may monitor long-term trends and patterns of performance and employ AI / ML models to perform corrective actions through the SMO framework 305 (such as via reconfiguration of the O1 interface) or via the creation of RAN management policies (such as A1 interface policies).

[0061] As indicated above, Figure 3 are provided as examples. Other examples may be found in the Figure 3 The examples described are different.

[0062] In addition to communication, wireless communication systems can also support RF sensing. Typical sensing applications often use chirp signals in association with performing sensing. A chirp signal is a signal that includes a (periodic) frequency that increases (i.e., chirps upward) or decreases (i.e., chirs downward) over time. An advantage of using a chirp signal in association with performing sensing is that the chirp signal can be generated to scan a relatively wide bandwidth. However, due to the nature of the chirps in the chirp signal (e.g., a set of linear ramps in frequency), the specific implementation of the modulation component (e.g., modulator, demodulator, etc.) can have a relatively low complexity, which enables the use of a relatively narrow bandwidth in the baseband (e.g., compared to the bandwidth of the chirp signal).

[0063] However, typical wireless communication systems use CP-OFDM waveforms to transmit and receive wireless communications. Therefore, in order to support RF sensing in addition to communication, it would be beneficial for the waveform of the chirp signal to be compatible with the CP-OFDM waveform used for communication.

[0064] Some aspects described herein provide techniques and apparatus for CP-OFDM compatible digital chirps. In some aspects, a wireless communication device (e.g., a UE, a network node, etc.) may generate a chirp signal associated with performing RF sensing, wherein the chirp signal has a waveform compatible with a CP-OFDM waveform used for communication. For example, in some aspects, a chirp signal may include a chirp and a CP corresponding to the chirp within an OFDM symbol. For another example, in some aspects, a chirp signal may include one or more chirps and one or more zero padding portions within an OFDM symbol. The wireless communication device may send the chirp signal in association with performing RF sensing. Additional details are provided below.

[0065] In this way, a wireless communication device can generate a chirp signal that provides the advantages of a typical chirp signal (e.g., relatively wide bandwidth scanning, low complexity implementation, use of relatively narrow bandwidth in baseband, etc.) while being compatible with a typical CP-OFDM waveform used for communication. In addition, the techniques and apparatus described herein enable multiplexing of RF sensing and communication at the system level - meaning that RF sensing and communication can use the same spectrum, which enables improved hardware reuse and resource reuse.

[0066] 4A to 4F is a diagram illustrating an example of digital chirping associated with CP-OFDM compatible according to the present disclosure. Figure 4A As shown, example 400 includes a wireless communication device 402. The wireless communication device 402 may correspond to, for example, a network node 110 or a UE 120. In some aspects, the wireless communication device 402 may be included in a wireless network, such as the wireless network 100. In some aspects, the wireless communication device 402 may communicate with one or more wireless communication devices (e.g., one or more network nodes 110, one or more UEs 120, etc.) via one or more wireless access links.

[0067] like Figure 4AAs shown in reference 404, the wireless communication device 402 can generate a chirp signal associated with performing RF sensing, wherein the chirp signal has a waveform compatible with a CP-OFDM waveform used for communication (e.g., for data communication, for communication of a reference signal, or another type of transmission). In some aspects, the chirp signal is a typical chirp signal in that analog processing, modulation, demodulation, and other processing can be handled as a typical sensing application, but the waveform of the chirp signal can be compatible with the CP-OFDM waveform (i.e., a waveform used for communication). This compatibility improves system operation by, for example, enabling resources to be easily allocated to RF sensing and communication as needed.

[0068] In some aspects, the wireless communication device 402 generates a chirp signal such that within one OFDM symbol, the chirp signal includes a chirp and a CP corresponding to the chirp. Figure 4B and Figure 4C In some aspects, the wireless communication device 402 can generate a chirp signal such that the chirp signal includes a chirp and a CP corresponding to the chirp within a given symbol (e.g., symbol S0, symbol S1, symbol S13, etc.). In some aspects, the time domain duration of the chirp is the same as the symbol duration of the OFDM symbol. In some aspects, the length of the CP corresponding to the chirp is the same as the length of the CP used for the OFDM symbol. In some aspects, including the CP corresponding to the chirp provides compatibility with a CP-OFDM waveform (e.g., because CP-OFDM utilizes the CP in association with providing communication).

[0069] In some aspects, the wireless communication device 402 may append a CP to a chirp (e.g., Figure 4B and Figure 4C Additionally or alternatively, the wireless communication device 402 may prepend a CP to the chirp (e.g., the CP may be at the beginning of an OFDM symbol). In some aspects, the CP is a repetition of a portion of the chirp. In some aspects, the slope of the frequency of the CP (e.g., the change in frequency over time) matches the slope of the frequency of the chirp.

[0070] In some aspects, the frequency of the chirps in the chirp signal may ramp up (eg, increase) within an OFDM symbol, an example of which is shown in FIG. Figure 4B Additionally or alternatively, the frequency of the chirp in the chirp signal may ramp down (eg, decrease) within the OFDM symbol. In some aspects, the chirp may be a linear chirp, an example of which is shown in Figure 4B Additionally or alternatively, the change in the frequency of the chirp (eg, ramp up or ramp down) may be non-linear.

[0071] Additionally or alternatively, the frequency of the chirps in the chirp signal may in some aspects both ramp up and ramp down within an OFDM symbol, an example of which is shown in FIG. Figure 4C In some aspects, the chirp can be a triangular chirp, an example of which is shown in Figure 4C Additionally or alternatively, the change in frequency of the chirp (eg, ramp up and ramp down) may be non-triangular.

[0072] In some aspects, the frequency of the chirp may be ramped up and ramped down so as to cause the frequency of the chirp to match the frequency of the CP (e.g., such that there is an approximate continuity of frequency at points in time between the CP and the chirp). For example, if a CP is appended to a chirp within an OFDM symbol (e.g., as Figure 4C As shown), the starting frequency of the CP can match the ending frequency of the chirp. For another example, if the CP is prepended to the chirp within the OFDM symbol, the starting frequency of the chirp can match the ending frequency of the CP. In some aspects, if the waveform is generated in digital hardware, the frequency of the chirp can be considered to match the frequency of the CP when the frequency difference between the chirp and the CP at a time point between the CP and the chirp is less than or approximately equal to the quantization error (for example, when the frequency difference is less than or approximately equal to a value of Ts×SL, where Ts is the sampling rate and SL is the slope of the frequency ramp).

[0073] In some aspects, such frequency matching reduces or eliminates frequency hops between the chirp and the CP, which could otherwise increase the error vector magnitude (EVM), increase emissions, and increase the complexity of hardware implementations for generating the chirp in the analog domain.

[0074] In some aspects, the frequency of the chirp may include multiple repetitions of a frequency pattern within an OFDM symbol. That is, in some aspects, the frequency of the chirp may ramp up or ramp down multiple times within an OFDM symbol, an example of which is shown in FIG. Figure 4D In some aspects, the chirp may include multiple repetitions of a triangular frequency pattern, an example of which is shown in Figure 4D In some aspects, the frequency change of any of the repetitions of the frequency pattern within the chirp may be non-triangular. In some aspects, the frequency of the chirp may include multiple repetitions of the frequency pattern within the OFDM symbol to provide a pattern (sometimes referred to as a comb pattern) in which frequency domain resources are allocated at approximately equal distances from each other, while still enabling the frequency of the chirp to match the frequency of the CP, such as for Figure 4C In some aspects, such a mode is advantageous because a sensing reference signal may occupy a relatively small set of resource elements (e.g., every four resource element sets) and other resource element sets may be used for one or more other purposes, such as data transmission. Thus, even when scanning a wide bandwidth, the amount of resources occupied by the sensing reference signal may be relatively low, thereby enabling increased resource availability for transmission.

[0075] In some aspects, the chirp signal includes one or more chirps and one or more zero-filled portions within an OFDM symbol. Figure 4E In some aspects, the chirp signal may include multiple chirps, where each pair of adjacent chirps is separated by a zero-filled portion (e.g., one or more zeros). In some aspects, the wireless communication device 402 may generate one or more chirps in a pre-discrete Fourier transform (pre-DFT) domain, and then use a DFT-s-OFDM waveform to generate the chirp signal. That is, the wireless communication device 402 may generate one or more chirps in a pre-DFT domain, and then use a DFT-s-OFDM waveform to generate the waveform. More specifically, the wireless communication device 402 may generate time domain samples for the chirp, and then fill the samples for the chirp with zeros (e.g., at the beginning or end). The wireless communication device 402 may generate multiple zero-filled chirps in this manner. Next, the wireless communication device 402 may perform a DFT expansion to convert the samples and zeros to the frequency domain, map the resulting tone to a frequency domain resource block, and perform an FFT to cause the tone to be at the system bandwidth (i.e., convert it to samples having the system bandwidth sampling rate) and to cause the tone to become a multi-chirp burst of a waveform. In this way, the wireless communication device 402 may generate a chirp signal comprising one or more chirps separated by zeros within one OFDM symbol. Notably, the zero padding results in a CP that includes only zeros (or almost exclusively includes zeros), and thus the waveform of the chirp signal is compatible with the CP-OFDM waveform used for communication. In some implementations, a repeating pattern of chirps and zero-padding portions may be used as a method for generating a DFT-S-based chirp signal comprising a series of chirps and gaps (e.g., as described below). Figure 5B The embodiment of the present invention relates to an input associated with a chirp signal (as illustrated), which improves the transmission associated with the chirp signal.

[0076] In some aspects, the starting frequency of the first chirp of the one or more chirps is different from the starting frequency of the second chirp of the one or more chirps. That is, the chirps within one OFDM symbol can have different starting frequency positions. Additionally or alternatively, the ending frequency of the first chirp can be different from the ending frequency of the second chirp. That is, in some aspects, the chirps within one OFDM symbol can have different ending frequency positions.

[0077] In some implementations, the chirp can be modulated with a slope or ramp with zero-filled sections between each chirp. Figure 4F In some aspects, a chirp signal may include multiple chirps modulated with a continuous slope, where each pair of adjacent chirps is separated by a zero-filled portion. Such techniques enable measurement of relatively wide bandwidths while allowing resource blocks between chirps to be used for data communications.

[0078] In some aspects, a starting frequency of a first chirp in the one or more chirps may match a starting frequency of a second chirp in the one or more chirps. Additionally or alternatively, an ending frequency of the first chirp may match an ending frequency of the second chirp. Thus, in some aspects, phase continuity may be maintained between a pair of chirps within an OFDM symbol.

[0079] In some aspects, resource blocks corresponding to the one or more zero-filled portions may be available for use in association with communications. For example, due to the time and frequency positioning of each chirp, one or more resource blocks between chirps in a chirped signal may experience relatively low interference and thus may be allocated and used for communications. In this way, bandwidth utilization may be improved.

[0080] Return to Figure 4A As shown in reference 406, the wireless communication device 402 can transmit a chirp signal in association with performing RF sensing. That is, the wireless communication device 402 can transmit a CP-OFDM compatible chirp signal and can accordingly perform operations associated with RF sensing.

[0081] As indicated above, 4A to 4F are provided as examples. Other examples can be found in 4A to 4F The content described is different.

[0082] Figure 5A and Figure 5B is a diagram illustrating an example in which a chirp signal having a CP-OFDM compatible waveform as described herein may be generated in the digital domain.

[0083] Figure 5A The first method shown is an OFDM-like method. According to the OFDM-like method, the generation of the OFDM waveform includes converting the sequence into parallel and then rotating the parallelized sequence with a phase shift. Next, the iFFT of the phase-rotated parallelized sequence is used to generate a time domain waveform, which is then rotated using another phase shift vector.

[0084] Figure 5B The second method shown is a DFT-s-OFDM-like method, according to which the generation of the DFT-s-OFDM waveform includes converting the sequence into parallel and then applying the DFT. Next, frequency domain spectral shaping is applied (e.g., where c k is a frequency domain window for frequency domain spectral shaping and pitch-by-tone processing), after which iFFT is used to generate the time domain waveform.

[0085] It is worth noting that Figure 5A and Figure 5Bis provided as an example, and in some aspects, a chirp signal having a CP-OFDM compatible waveform may be generated in another manner. That is, a chirp signal having a CP-OFDM compatible waveform may be generated in a manner different from Figure 5A and Figure 5B The method shown is generated in the digital domain.

[0086] Figure 6 is a diagram illustrating an example process 600 performed, for example, by a wireless communication device according to the present disclosure. Example process 600 is an example of a wireless communication device (eg, network node 110, UE 120, wireless communication device 402, etc.) performing operations associated with CP-OFDM compatible digital chirping.

[0087] like Figure 6 As shown, in some aspects, process 600 may include generating a chirp signal associated with performing RF sensing, wherein the chirp signal has a waveform compatible with a CP-OFDM waveform used for communication (block 610). For example, a wireless communication device (e.g., using Figure 7 The communication manager 140, the communication manager 150 and / or the chirp signal generator 708 depicted in FIG. 1 may generate a chirp signal associated with performing RF sensing, wherein the chirp signal has a waveform compatible with a CP-OFDM waveform used for communication, as described above.

[0088] like Figure 6 As further shown, in some aspects, process 600 may include sending a chirp signal in association with performing RF sensing (block 620). Figure 7 The communication manager 140, the communication manager 150, and / or the transmitting component 704 depicted in FIG. 7 may transmit a chirp signal in association with performing RF sensing, as described above.

[0089] Process 600 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0090] In a first aspect, within one OFDM symbol, a chirp signal includes a chirp and a CP corresponding to the chirp.

[0091] In a second aspect, either alone or in combination with the first aspect, the chirp is a linear chirp.

[0092] In a third aspect, alone or in combination with one or more of the first and second aspects, the frequency of the chirp is ramped up within an OFDM symbol.

[0093] In a fourth aspect, either alone or in combination with one or more of the first to third aspects, the chirp is a triangular chirp.

[0094] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, the frequency of the chirp ramps up within one OFDM symbol and ramps down within the one OFDM symbol.

[0095] In a sixth aspect, either alone or in combination with one or more of the first to fifth aspects, a start frequency of the CP matches an end frequency of the chirp.

[0096] In a seventh aspect, either alone or in combination with one or more of the first to sixth aspects, the chirp comprises multiple repetitions of a frequency pattern.

[0097] In an eighth aspect, within one OFDM symbol, the chirp signal includes one or more chirps and one or more zero-padding parts.

[0098] In a ninth aspect, either alone or in combination with the eighth aspect, a starting frequency of a first chirp of the one or more chirps is different from a starting frequency of a second chirp of the one or more chirps, wherein the first chirp and the second chirp are separated by one of the one or more zero-filled portions.

[0099] In a tenth aspect, either alone or in combination with one or more of the eighth and ninth aspects, a stop frequency of a first chirp of the one or more chirps is different from a stop frequency of a second chirp of the one or more chirps, wherein the first chirp and the second chirp are separated by a zero-filled portion of the one or more zero-filled portions.

[0100] In an eleventh aspect, alone or in combination with one or more of the eighth to tenth aspects, blocks corresponding to the one or more zero-filled portions are available for use in association with communication.

[0101] In a twelfth aspect, alone or in combination with one or more of the eighth to eleventh aspects, the one or more chirps are generated in a pre-DFT domain, and the chirp signal is generated using a DFT-spread OFDM waveform.

[0102] although Figure 6 An example block diagram of process 600 is shown, but in some aspects, process 600 may include Figure 6 Additional blocks, fewer blocks, different blocks, or blocks arranged in a different manner than those depicted in the process 600. Additionally or alternatively, two or more of the blocks in the process 600 may be performed in parallel.

[0103] Figure 7is a diagram of an example apparatus 700 for wireless communication according to the present disclosure. Apparatus 700 may be a wireless communication device (e.g., a network node, a UE, etc.), or a wireless communication device may include apparatus 700. In some aspects, apparatus 700 includes a receiving component 702 and a transmitting component 704 that may communicate with each other (e.g., via one or more buses and / or one or more other components). As shown, apparatus 700 may communicate with another apparatus 706 (such as a UE, a base station, or another wireless communication device) using receiving component 702 and transmitting component 704. As further shown, apparatus 700 may include a communication manager 140 (e.g., when apparatus 700 is a UE) or a communication manager 150 (e.g., when apparatus 700 is a network node). Communication manager 140 / 150 may include a chirp signal generator 708, etc.

[0104] In some aspects, the apparatus 700 may be configured to perform FIG. 4A to FIG. 5B Additionally or alternatively, the apparatus 700 may be configured to perform one or more processes described herein, such as Figure 6 The process 600. In some aspects, Figure 7 The device 700 and / or one or more components shown may include a combination of Figure 2 Additionally or alternatively, Figure 7 One or more of the components shown may be combined with Figure 2 Additionally or alternatively, one or more components in the set of components may be implemented at least in part as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and can be executed by a controller or processor to perform the function or operation of the component.

[0105] The receiving component 702 may receive communications from the device 706, such as reference signals, control information, data communications, or combinations thereof. The receiving component 702 may provide the received communications to one or more other components of the device 700. In some aspects, the receiving component 702 may perform signal processing (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, etc.) on the received communications and may provide the processed signals to one or more other components of the device 700. In some aspects, the receiving component 702 may include combining Figure 2 One or more antennas, modems, demodulators, MIMO detectors, receiving processors, controllers / processors, memories or combinations thereof of the wireless communication device.

[0106] The transmitting component 704 may transmit communications, such as reference signals, control information, data communications, or combinations thereof, to the device 706. In some aspects, one or more other components of the device 700 may generate communications and may provide the generated communications to the transmitting component 704 for transmission to the device 706. In some aspects, the transmitting component 704 may perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, etc.) on the generated communications and may transmit the processed signals to the device 706. In some aspects, the transmitting component 704 may include combining Figure 2 One or more antennas, modems, modulators, transmit MIMO processors, transmit processors, controllers / processors, memories, or combinations thereof of the wireless communication device. In some aspects, the transmit component 704 can be co-located with the receive component 702 in a transceiver.

[0107] The chirp signal generator 708 can generate a chirp signal associated with performing RF sensing, wherein the chirp signal has a waveform compatible with a CP-OFDM waveform used for communications. The transmitting component 704 can transmit the chirp signal associated with performing RF sensing.

[0108] Figure 7 The number and arrangement of components shown are provided as examples. In practice, there may be Figure 7 Additional components, fewer components, different components, or components arranged in a different manner than those shown. Figure 7 Two or more components shown may be implemented in a single component, or Figure 7 The single component shown may be implemented as multiple distributed components. Additionally or alternatively, Figure 7 The assembly (one or more components) shown may be described as being executable by Figure 7 Another component shown as a collection performs one or more functions.

[0109] The following provides an overview of some aspects of the disclosure:

[0110] Aspect 1: A method of wireless communication performed by a wireless communication device, the method comprising: generating a chirp signal associated with performing RF sensing, wherein the chirp signal has a waveform compatible with a CP-OFDM waveform used for communication; and transmitting the chirp signal in association with performing RF sensing.

[0111] Aspect 2: The method according to aspect 1, wherein within one OFDM symbol, the chirp signal includes a chirp and a CP corresponding to the chirp.

[0112] Aspect 3: The method according to aspect 2, wherein the chirp is a linear chirp.

[0113] Aspect 4: The method according to any one of aspects 1 to 3, wherein the frequency of the chirp is ramped up within the one OFDM symbol.

[0114] Aspect 5: The method according to aspect 2, wherein the chirp is a triangular chirp.

[0115] Aspect 6: The method according to any one of aspects 2 and 5, wherein the frequency of the chirp is ramped up within the one OFDM symbol and is ramped down within the one OFDM symbol.

[0116] Aspect 7: The method according to any one of Aspects 2 and 4 to 6, wherein a start frequency of the CP matches a stop frequency of the chirp.

[0117] Aspect 8: The method according to any one of aspects 2 and aspects 4 to 7, wherein the chirp comprises multiple repetitions of a frequency pattern.

[0118] Aspect 9: The method according to aspect 1, wherein within one OFDM symbol, the chirp signal includes one or more chirps and one or more zero padding parts.

[0119] Aspect 10: The method according to aspect 9, wherein a starting frequency of a first chirp among the one or more chirps is different from a starting frequency of a second chirp among the one or more chirps, wherein the first chirp and the second chirp are separated by one zero-filled portion among the one or more zero-filled portions.

[0120] Aspect 11: A method according to any one of Aspects 9 to 10, wherein the end frequency of a first chirp among the one or more chirps is different from the end frequency of a second chirp among the one or more chirps, and wherein the first chirp and the second chirp are separated by one of the one or more zero-filled portions.

[0121] Aspect 12: The method according to any one of aspects 9 to 11, wherein resource blocks corresponding to the one or more zero-filled portions are available for use in association with communication.

[0122] Aspect 13: The method according to any one of aspects 9 to 12, wherein the one or more chirps are generated in a pre-DFT domain, and the chirp signal is generated using a DFT-s-waveform.

[0123] Aspect 14: The method according to any one of aspects 9 to 13, wherein the one or more chirps are modulated with a slope or ramp.

[0124] Aspect 15: An apparatus for performing wireless communication at a device, the apparatus comprising: a processor; a memory coupled to the processor; and instructions 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 to 14.

[0125] Aspect 16: A device for wireless communication, the device comprising a memory and one or more processors coupled to the memory, the one or more processors being configured to execute the method according to one or more of aspects 1 to 14.

[0126] Aspect 17: An apparatus for wireless communication, the apparatus comprising at least one component for executing the method according to one or more aspects of aspects 1 to 14.

[0127] Aspect 18: A non-transitory computer-readable medium storing a code for wireless communication, the code comprising instructions executable by a processor to perform the method according to one or more aspects of aspects 1 to 14.

[0128] Aspect 19: 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 to 14.

[0129] 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 may be made in light of the above disclosure or may be acquired from practice of the various aspects.

[0130] As used herein, the term "component" is intended to be broadly interpreted as hardware, and / or a combination of hardware and software. Whether referred to as software, firmware, middleware, microcode, hardware description language or other names, "software" should be broadly interpreted as meaning instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures and / or functions, etc. As used herein, "processor" is implemented by a combination of hardware and / or hardware and software. It will be apparent that the systems and / or methods described herein can be implemented by a combination of hardware and / or hardware and software in different forms. The actual dedicated control hardware or software code used to implement these systems and / or methods does not limit various aspects. Therefore, the operation and behavior of the system and / or method are not described herein with reference to specific software codes, because it will be understood by those skilled in the art that software and hardware can be designed to implement the system and / or method at least in part based on the description herein.

[0131] 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.

[0132] Although the specific combination of features is stated in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of various aspects. Many of these features can be combined in a manner not specifically stated in the claims and / or not disclosed in the specification. The disclosure of various aspects includes each dependent claim combined with each other claim in the claim set. As used herein, the phrase "at least one of" the list of items refers to any combination of these items (it includes a single member). As an example, "at least one of a, b or c" is intended to cover a, b, c, a+b, a+c, b+c and a+b+c, and any combination with multiple identical elements (for example, a+a, a+a+a, a+a+b, a+a+c, a+b+b, a+c+c, b+b, b+b+b, b+b+c, c+c and c+c+c, or any other sorting of a, b and c).

[0133] Any element, action or instruction used herein should not be interpreted as key or necessary, unless clearly stated. In addition, as used herein, the article "one" is intended to include one or more projects, and can be used interchangeably with "one or more". In addition, as used herein, the article "said" is intended to include one or more projects connected with the article "said", 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, and can be used interchangeably with "one or more". If only want to refer to a project, the phrase "only one" or similar terms will be used. In addition, as used herein, the terms "have", "have", "have" etc. are intended to be open terms, which do not limit the elements they modify (for example, "having" A elements can also have B). In addition, the phrase "based on" is intended to represent "based at least in part", unless explicitly stated otherwise. Furthermore, as used herein, the term "or" when used in a series is intended to be open-ended 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 wireless communication device for wireless communication, the wireless communication device comprising: Memory; and one or more processors coupled to the memory, the one or more processors configured to: generating a chirp signal associated with performing radio frequency (RF) sensing, wherein the chirp signal has a waveform compatible with a cyclic prefix (CP) orthogonal frequency division multiplexing (OFDM) waveform used for communication; and The chirp signal is sent in association with performing RF sensing. 2 . The wireless communication device according to claim 1 , wherein within one OFDM symbol, the chirp signal includes a chirp and a CP corresponding to the chirp.

3. The wireless communication device of claim 2, wherein the chirp is a linear chirp. 4 . The wireless communication device of claim 2 , wherein the frequency of the chirp ramps up within the one OFDM symbol.

5. The wireless communication device of claim 2, wherein the chirp is a triangular chirp. 6 . The wireless communication device of claim 2 , wherein the frequency of the chirp ramps up within the one OFDM symbol and ramps down within the one OFDM symbol.

7. The wireless communication device of claim 2, wherein a start frequency of the CP matches an end frequency of the chirp.

8. The wireless communication device of claim 2, wherein the chirp comprises multiple repetitions of a frequency pattern.

9. The wireless communication device according to claim 1, wherein within one OFDM symbol, the chirp signal includes one or more chirps and one or more zero padding parts.

10. The wireless communication device of claim 9, wherein a starting frequency of a first chirp of the one or more chirps is different from a starting frequency of a second chirp of the one or more chirps, wherein the first chirp and the second chirp are separated by one of the one or more zero-padded portions.

11. The wireless communication device of claim 9, wherein a stop frequency of a first chirp of the one or more chirps is different from a stop frequency of a second chirp of the one or more chirps, wherein the first chirp and the second chirp are separated by one of the one or more zero-filled portions.

12. The wireless communication device of claim 9, wherein resource blocks corresponding to the one or more zero-filled portions are available for use in association with communications.

13. The wireless communication device of claim 9, wherein the one or more chirps are generated in a pre-discrete Fourier transform (pre-DFT) domain, and the chirp signal is generated using a DFT-spread OFDM waveform.

14. The wireless communication device of claim 9, wherein the one or more chirps are modulated with a slope or ramp.

15. A method of wireless communication performed by a wireless communication device, the method comprising: generating a chirp signal associated with performing radio frequency (RF) sensing, wherein the chirp signal has a waveform compatible with a cyclic prefix (CP) orthogonal frequency division multiplexing (OFDM) waveform used for communication; and The chirp signal is sent in association with performing RF sensing.

16. The method according to claim 15, wherein within one OFDM symbol, the chirp signal includes a chirp and a CP corresponding to the chirp. The method of claim 16 , wherein the chirp is a linear chirp.

18. The method of claim 16, wherein the frequency of the chirp is ramped up within the one OFDM symbol.

19. The method of claim 16, wherein the chirp is a triangular chirp.

20. The method of claim 16, wherein the frequency of the chirp ramps up within the one OFDM symbol and ramps down within the one OFDM symbol.

21. The method of claim 16, wherein a start frequency of the CP matches an end frequency of the chirp.

22. The method of claim 16, wherein the chirp comprises multiple repetitions of a frequency pattern.

23. The method according to claim 15, wherein within one OFDM symbol, the chirp signal includes one or more chirps and one or more zero padding parts.

24. The method of claim 23, wherein a starting frequency of a first chirp of the one or more chirps is different from a starting frequency of a second chirp of the one or more chirps, wherein the first chirp and the second chirp are separated by one of the one or more zero-padded portions.

25. The method of claim 23, wherein a stop frequency of a first chirp of the one or more chirps is different from a stop frequency of a second chirp of the one or more chirps, wherein the first chirp and the second chirp are separated by one of the one or more zero-padded portions.

26. The method of claim 23, wherein resource blocks corresponding to the one or more zero-filled portions are available for use in association with communications.

27. The method of claim 23, wherein the one or more chirps are generated in a pre-discrete Fourier transform (pre-DFT) domain, and the chirp signal is generated using a DFT-spread OFDM waveform.

28. A non-transitory computer readable medium storing an instruction set for wireless communication, the instruction set comprising: One or more instructions that, when executed by one or more processors of a wireless communication device, cause the wireless communication device to: generating a chirp signal associated with performing radio frequency (RF) sensing, wherein the chirp signal has a waveform compatible with a cyclic prefix (CP) orthogonal frequency division multiplexing (OFDM) waveform used for communication; and The chirp signal is sent in association with performing RF sensing.

29. The non-transitory computer-readable medium of claim 27, wherein within one OFDM symbol, the chirp signal comprises at least one of the following: chirp and a CP corresponding to the chirp, or One or more chirps and one or more zero-filled sections.

30. An apparatus for wireless communication, the apparatus comprising: means for generating a chirp signal associated with performing radio frequency (RF) sensing, wherein the chirp signal has a waveform compatible with a cyclic prefix (CP) orthogonal frequency division multiplexing (OFDM) waveform used for communication; and Means for transmitting the chirp signal in association with performing RF sensing.

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