Method and apparatus for pulse-shaped and overlapped phase tracking reference signals

Abstract

Methods and apparatus related to pulse-shaped and overlapping phase tracking reference signals are disclosed. In a wireless communication network, signaling indicating information associated with a first pulse shaping is transmitted between a first communication device and a second communication device. And transmitting and / or receiving data with a phase tracking reference signal (PT-RS) generated in accordance with the first pulse shaping, as a pulse-shaped PT-RS including the PT-RS and data to which a second pulse shaping different from the first pulse shaping has been applied, and data.

Description

Technical Field

[0001] The present application relates generally to wireless communications and, more particularly, to phase tracking reference signals for use in wireless communication systems. Background Art

[0002] In some wireless communication systems, user equipment (UE) communicates wirelessly with one or more network devices such as base stations, and may also communicate wirelessly with each other. Wireless communication from UE to network devices is called uplink transmission. Wireless communication from network devices to UE is called downlink transmission. Direct wireless communication between UEs is called device-to-device communication or sidelink transmission. Network devices can also communicate wirelessly with each other over backhaul links.

[0003] When two communication devices communicate wirelessly, the communication device that sends the signal can be called a sending device, and the communication device that receives the signal can be called a receiving device. If a single communication device performs both sending and receiving, the communication device can be both a sending device and a receiving device. For example, the communication device includes a UE and a network device. For example, in uplink transmission, the UE is a sending device and the network device is a receiving device. In downlink transmission, the UE is a receiving device and the network device is a sending device. In sidelink transmission, one UE is a sending device and the other UE is a receiving device. When network devices perform backhaul communication via a backhaul link, one network device is a sending device and the other network device is a receiving device.

[0004] A reference signal may be sent from a transmitting device to a receiving device via a wireless channel. The reference signal may be used, for example, for any of a variety of receiving operations, such as noise estimation. As wireless communication systems increasingly use higher carrier frequencies due to the availability of larger bandwidths at higher frequencies, the role of reference signals, for example, for noise estimation, becomes more important. Competing requirements such as peak to average power ratio (PAPR) and spectral efficiency may pose significant challenges to proper reference signal operation in these wireless communication systems. Summary of the invention

[0005] The present invention relates to pulse shaping of reference signals such as phase tracking reference signal (PT-RS), especially for multiple UEs with overlapping bandwidth. When the carrier frequency is high, phase noise (PN) may become a big problem. Therefore, PT-RS is introduced in the new radio (NR), that is, the fifth generation of wireless cellular communications. The receiver can use PT-RS to estimate and correct PN, thereby significantly improving the block error rate (BLER) performance.

[0006] Pulse shaping can be used together with bandwidth extension of the signal waveform to reduce the peak to average power ratio (PAPR) of the transmitted signal. To reduce hardware complexity, a lower PAPR is usually desired. For example, pulse shaping and bandwidth extension can be used for single carrier-offset quadrature amplitude modulation (SC-OQAM) waveforms or frequency domain spectral shaping with discrete Fourier transform–spread orthogonal frequency division multiplexing (FDSS-DFT-s-OFDM) waveforms. Typically, pulse shaping is performed in the frequency domain, and the PAPR is reduced by bandwidth extension and pulse shaping. This approach achieves a compromise between PAPR and spectral efficiency. For example, larger bandwidth extension and larger pulse shape roll-off factors can reduce PAPR, but will reduce spectral efficiency.

[0007] This spectrum efficiency loss can be recovered by using UEs with overlapping bandwidths. Appropriate overlapping factors and pulse shaping can ensure orthogonality between UEs in flat fading channels. Although exact orthogonality is lost in frequency selective channels, performance can still be significantly improved by multiplexing UEs with overlapping bandwidths.

[0008] Although a PT-RS with low PAPR is required, the implementation of PT-RS is not easy for SC-OQAM due to inter-symbol interference (ISI), especially IQ interference. IQ interference refers to imaginary interference to real symbols or real interference to imaginary symbols. This IQ interference is a function of data and pulse shape. In the case where IQ interference affects the PT-RS symbol and is a function of data, the receiver has no knowledge of the interference and therefore cannot find the resulting PT-RS symbol to estimate the PN.

[0009] The quest for spectral efficiency exacerbates this challenge. Traditional solutions to the IQ interference problem involve specific PT-RS designs that either eliminate IQ interference or fix the IQ interference to a known value. This can be done by using auxiliary PT-RS symbols. While this approach may work well for a single UE that has no bandwidth overlap with another UE, serious problems may arise when used in conjunction with multiple UEs that need to have bandwidth overlap to improve spectral efficiency. A PT-RS designed to fix or eliminate IQ interference for only one UE may not work in the presence of multiple UEs because the PT-RS symbols at the receiver are subject to additional multi-UE interference. This multi-UE interference causes the receiver to incorrectly estimate the PN.

[0010] The multi-UE interference problem is not limited to SC-OQAM, but may also affect other waveforms such as FDS S DFT-s-OFDM.

[0011] The embodiments of the present invention include a PT-RS method, which can reduce the impact of interference such as IQ interference and multi-UE interference in overlapping transmission, so that the receiver can correctly estimate the PN.

[0012] In some embodiments, IQ and multi-UE interference are handled differently. For example, multi-UE interference can be handled by using different (shorter) pulses for the PT-RS signal at the transmitter. Such pulses are referred to herein as PT-RS pulses. The PT-RS signal is designed to handle IQ interference based on PT-RS pulses rather than data pulses.

[0013] According to one aspect of the present invention, a method includes transmitting, by a first communication device and a second communication device, signaling indicating information associated with a first pulse shaping in a wireless communication network. The method also includes transmitting, by the first communication device, data with a PT-RS generated according to the first pulse shaping in the wireless communication network as a pulse-shaped PT-RS and data including the PT-RS and data to which the second pulse shaping has been applied.

[0014] On the other hand, a method includes: transmitting, by a second communication device and a first communication device, signaling indicating information associated with a first pulse shaping in a wireless communication network; receiving, by the second communication device from the first communication device, data with a phase tracking reference signal (PT-RS) generated according to the first pulse shaping as a pulse-shaped PT-RS and data including the PT-RS and data to which the second pulse shaping has been applied.

[0015] According to another aspect of the present invention, an apparatus includes a processor and a non-transitory computer-readable storage medium coupled to the processor. The non-transitory computer-readable storage medium stores a program executed by the processor. A computer program product may be or include such a non-transitory computer-readable medium storing the program.

[0016] In an embodiment, the program includes instructions for or for causing the processor to transmit, through a first communication device and a second communication device, signaling indicating information associated with a first pulse shaping in a wireless communication network. The program also includes instructions for or for causing the processor to transmit, through the first communication device, data with a PT-RS generated according to the first pulse shaping in the wireless communication network as a pulse-shaped PT-RS and data including the PT-RS and data to which the second pulse shaping has been applied.

[0017] In another embodiment, the program includes instructions for or for causing the processor to: transmit signaling indicating information associated with a first pulse shaping communication in a wireless communication network with a first communication device through a second communication device; and receive data with a PT-RS generated according to the first pulse shaping from the first communication device through the second communication device as a pulse-shaped PT-RS and data including the PT-RS and data to which the second pulse shaping has been applied.

[0018] Optionally, in any of the above aspects or embodiments, the information associated with the first pulse shaping includes one or more filter coefficients of a pulse shaping filter.

[0019] Optionally, in any of the above aspects or embodiments, the information associated with the first pulse shaping includes the length of the pulse shaping filter.

[0020] Optionally, in any of the above aspects or embodiments, the information associated with the first pulse shaping specifies whether the first pulse shaping is applied when generating the PT-RS.

[0021] Optionally, in any of the above aspects or embodiments, the PT-RS includes one or more PT-RS symbols and one or more auxiliary PT-RS symbols.

[0022] Optionally, in any of the above aspects or embodiments, the PT-RS includes a PT-RS symbol and two auxiliary PT-RS symbols adjacent to the PT-RS symbol, wherein the auxiliary PT-RS symbol is selected according to the first pulse shaping to control inter-symbol interference (ISI) of the PT-RS symbol.

[0023] Optionally, in any of the above aspects or embodiments, the PT-RS includes a PT-RS symbol and an auxiliary PT-RS symbol adjacent to the PT-RS symbol, wherein the auxiliary PT-RS symbol is selected according to the first pulse shaping to control inter-symbol interference (ISI) of the PT-RS symbol.

[0024] Optionally, in any of the above aspects or embodiments, transmitting signaling includes sending the signaling from the first communication device to the second communication device.

[0025] Optionally, in any of the above aspects or embodiments, transmitting signaling includes receiving the signaling from the second communication device at the first communication device.

[0026] Optionally, in any of the above aspects or embodiments, sending the PT-RS and data includes the first communication device sending the PT-RS and data to the second communication device.

[0027] Optionally, in any of the above aspects or embodiments, sending the PT-RS and data includes the first communication device sending the PT-RS and data to a third communication device in the wireless communication network.

[0028] The present invention encompasses these and other aspects or embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] For a more complete understanding of embodiments of the present invention and advantages thereof, reference is now made, by way of example, to the following description taken in conjunction with the accompanying drawings.

[0030] Figure 1 A simplified schematic diagram of the communication system.

[0031] Figure 2 for Figure 1 A block diagram of an exemplary communication system in FIG.

[0032] Figure 3Exemplary electronic devices and base station examples are shown.

[0033] Figure 4 Shows units or modules in the device.

[0034] Figure 5 The IQ interference to the real PT-RS symbols is shown.

[0035] Figure 6 Multi-UE interference on PT-RS symbols is shown.

[0036] Figure 7 A block diagram illustrating an exemplary transmitter is shown.

[0037] Figure 8 Two pulse shaping features of an embodiment are shown.

[0038] Fig. 9 A block diagram illustrating an exemplary receiver is shown.

[0039] Fig.10 Receiver separation of PT-RS symbols is shown.

[0040] Fig.11 2 is a time domain diagram showing a data symbol, a PT-RS symbol, and two auxiliary PT-RS symbols adjacent to the PT-RS symbol.

[0041] Fig.12 FIG. 4 is a time domain diagram showing data symbols, PT-RS symbols and one auxiliary PT-RS symbol adjacent to the PT-RS symbol.

[0042] Fig.13 is a signal flow diagram for uplink transmission according to an embodiment.

[0043] Fig.14 FIG. 4 is a signal flow diagram for uplink transmission according to another embodiment.

[0044] Fig.15 is a signal flow diagram for downlink transmission according to an embodiment.

[0045] Fig.16 is a signal flow diagram for sidelink transmission according to an embodiment.

[0046] Fig.17 is a signal flow diagram for sidelink transmission according to another embodiment. DETAILED DESCRIPTION

[0047] For illustrative purposes, specific exemplary embodiments will now be explained in greater detail with reference to the accompanying drawings.

[0048] The embodiments described herein represent information sufficient to implement the claimed subject matter and illustrate methods of implementing such subject matter. After reading the following description in view of the accompanying drawings, those skilled in the art should understand the concepts of the claimed subject matter and should recognize applications of these concepts not specifically mentioned herein. It should be understood that these concepts and applications are within the scope of the present invention and the appended claims.

[0049] refer to Figure 1 , a simplified schematic diagram of a communication system is provided as a non-limiting illustrative example. The communication system 100 includes a radio access network 120. The radio access network 120 may be a next generation (e.g., sixth generation (6G) or higher) radio access network or a traditional (e.g., 5G, 4G, 3G or 2G) radio access network. One or more communication electronic devices (electric devices, ED) 110a, 110b, 110c, 110d, 110e, 110f, 110g, 110h, 110i, 110j (generally referred to as 110) may be interconnected or connected to one or more network nodes (170a, 170b, generally referred to as 170) in the radio access network 120. The core network 130 may be part of the communication system and may be dependent on or independent of the radio access technology used in the communication system 100. In addition, the communication system 100 includes a public switched telephone network (PSTN) 140, the Internet 150, and other networks 160.

[0050] Figure 2 An exemplary communication system 100 is shown. Typically, the communication system 100 enables multiple wireless or wired elements to transmit data and other content. The communication system 100 can be used to provide content such as voice, data, video and / or text through broadcast, multicast and unicast, etc. The communication system 100 can operate by sharing resources such as carrier spectrum bandwidth between its constituent elements. The communication system 100 may include a terrestrial communication system and / or a non-terrestrial communication system. The communication system 100 can provide a wide range of communication services and applications (such as earth monitoring, remote sensing, passive sensing and positioning, navigation and tracking, autonomous delivery and mobility, etc.). The communication system 100 can provide a high degree of availability and robustness through the joint operation of a terrestrial communication system and a non-terrestrial communication system. For example, integrating a non-terrestrial communication system (or its components) into a terrestrial communication system can produce a heterogeneous network that can be regarded as consisting of multiple layers. Compared with traditional communication networks, heterogeneous networks can obtain better overall performance through efficient multi-link joint operation between terrestrial networks and non-terrestrial networks, more flexible function sharing, and faster physical layer link switching.

[0051] Terrestrial communication systems and non-terrestrial communication systems can be considered as subsystems of the communication system. Figure 2 In the example shown, the communication system 100 includes electronic devices (EDs) 110a, 110b, 110c, 110d (generally referred to as EDs 110), radio access networks (RANs) 120a and 120b, non-terrestrial communication networks 120c, core networks 130, public switched telephone networks (PSTNs) 140, the Internet 150, and other networks 160. The RANs 120a and 120b include corresponding base stations (BSs) 170a and 170b, which may be generally referred to as terrestrial transmit and receive points (T-TRPs) 170a and 170b. The non-terrestrial communication network 120c includes an access node 172, which may be generally referred to as a non-terrestrial transmit and receive point (NT-TRP) 172.

[0052] Alternatively or in addition, any ED 110 may be used to connect, access or communicate with any T-TRP 170a, T-TRP 170b and NT-TRP 172, the Internet 150, the core network 130, the PSTN 140, other networks 160, or any combination of the foregoing. In some examples, ED 110a may communicate with T-TRP 170a for uplink and / or downlink transmissions via a ground air interface 190a. In some examples, ED 110a, 110b, 110c, and 110d may also communicate directly with each other via one or more sidelink air interfaces 190b. In some examples, ED 110d may communicate with NT-TRP 172 for uplink and / or downlink transmissions via a non-ground air interface 190c.

[0053] The air interfaces 190a and 190b may use similar communication technologies, such as any applicable wireless access technology. For example, the communication system 100 may implement one or more channel access methods in the air interfaces 190a and 190b, such as code division multiple access (CDMA), space division multiple access (SDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal FDMA (OFDMA) or single-carrier FDMA (SC-FDMA). The air interfaces 190a and 190b may utilize other high-dimensional signal spaces, which may involve combinations of orthogonal and / or non-orthogonal dimensions.

[0054] The non-terrestrial air interface 190c can enable communication between ED 110d and one or more NT-TRPs 172 via a wireless link or a simple link. For some examples, the link is a dedicated connection for unicast transmission, a connection for broadcast transmission, or a connection between a group of EDs 110 and one or more NT-TRPs 175 for multicast transmission.

[0055] The RANs 120a and 120b communicate with the core network 130 to provide various services such as voice and data to the EDs 110a, 110b, and 110c. The RANs 120a and 120b and / or the core network 130 may communicate directly or indirectly with one or more other RANs (not shown), which may or may not be directly served by the core network 130 and may or may not use the same radio access technology as the RANs 120a and / or RANs 120b. The core network 130 may also serve as a gateway access between (i) the RANs 120a and 120b and / or the EDs 110a, 110b, and 110c and (ii) other networks (e.g., the PSTN 140, the Internet 150, and other networks 160). In addition, some or all of the EDs 110a, 110b, and 110c may include the functionality of communicating with different wireless networks through different radio links using different radio technologies and / or protocols. Instead of (or in addition to) wireless communications, EDs 110a, 110b, and 110c may communicate with a service provider or switch (not shown) and the Internet 150 via a wired communications channel. PSTN 140 may include a circuit-switched telephone network for providing plain old telephone service (POTS). Internet 150 may include a network of computers and / or subnets (intranets) and incorporate protocols such as the Internet Protocol (IP), the Transmission Control Protocol (TCP), and the User Datagram Protocol (UDP). EDs 110a, 110b, and 110c may be multi-mode devices capable of operating in accordance with a variety of wireless access technologies and incorporate a number of transceivers required to support these technologies.

[0056] Figure 3Another example of ED 110 and base stations 170a, 170b and / or 170c is shown. ED 110 is used to connect people, objects, machines, etc. ED 110 can be widely used in various scenarios, such as cellular communication, device-to-device (D2D), vehicle to everything (V2X), peer-to-peer (P2P), machine-to-machine (M2M), machine-type communication (MTC), Internet of Things (IOT), virtual reality (VR), augmented reality (AR), industrial control, autonomous driving, telemedicine, smart grid, smart furniture, smart office, smart wearable devices, smart transportation, smart city, drones, robots, remote sensing, passive sensing, positioning, navigation and tracking, autonomous delivery and mobility, etc.

[0057] Each ED 110 represents any applicable end-user device for wireless operation, and may include (or may be referred to as): user equipment / device (UE), wireless transmit / receive unit (WTRU), mobile station, fixed or mobile user unit, cellular phone, station (STA), machine type communication (MTC) device, personal digital assistant (PDA), smart phone, laptop, computer, tablet, wireless sensor, consumer electronic device, smart book, vehicle, car, truck, bus, train or IoT device, industrial equipment, or devices in the above devices (such as communication modules, modems or chips), etc. The next generation ED 110 may be referred to using other terms. Base stations 170a and 170b are both T-TRPs, hereinafter referred to as T-TRP 170. Figure 3 Also shown is an NT-TRP, hereinafter referred to as NT-TRP 172. Each ED 110 connected to T-TRP 170 and / or NT-TRP 172 may be dynamically or semi-statically opened (i.e., established, activated, or enabled), closed (i.e., released, deactivated, or disabled), and / or configured in response to one or more of connection availability and connection necessity.

[0058] ED 110 includes a transmitter 201 and a receiver 203 coupled to one or more antennas 204. Only one antenna 204 is shown. Alternatively, one, some or all of the antennas 204 may be panels. Transmitter 201 and receiver 203 may be integrated into a transceiver, for example. The transceiver is used to modulate data or other content so that it can be sent through at least one antenna 204 or a network interface controller (NIC). The transceiver can also be used to demodulate data or other content received through at least one antenna 204. Each transceiver includes any applicable structure for generating signals for wireless or wired transmission and / or for processing signals received wirelessly or wired. Each antenna 204 includes any applicable structure for sending and / or receiving wireless or wired signals.

[0059] ED 110 includes at least one memory 208. Memory 208 stores instructions and data used, generated, or collected by ED 110. For example, memory 208 may store software instructions or modules for implementing some or all of the functions and / or embodiments described herein and executed by one or more processing units (e.g., processor 210). Each memory 208 includes any applicable volatile and / or non-volatile storage and retrieval device. Any applicable type of memory may be used, such as random access memory (RAM), read only memory (ROM), hard disk, optical disk, subscriber identity module (SIM) card, memory stick, secure digital (SD) memory card, processor cache, etc.

[0060] ED 110 may also include one or more input / output devices (not shown) or interfaces (e.g., connected to Figure 1 The input / output devices support interaction with users or other devices in the network. Each input / output device includes any suitable structure for providing information to or receiving information from a user, such as through the operation of a speaker, microphone, keypad, keyboard, display, or touch screen (including network interface communication).

[0061] ED 110 includes a processor 210 for performing operations including operations related to preparing transmissions for uplink transmission to NT-TRP 172 and / or T-TRP 170, operations related to processing downlink transmissions received from NT-TRP 172 and / or T-TRP 170, and operations related to processing sidelink transmissions to and from another ED 110. Processing operations related to preparing transmissions for uplink transmissions may include operations such as encoding, modulation, transmit beamforming, and generating symbols for transmission. Processing operations related to processing downlink transmissions may include operations such as receive beamforming, demodulation, and decoding received symbols. According to an embodiment, receiver 203 may receive downlink transmissions, possibly using receive beamforming, and processor 210 may extract signaling from the downlink transmissions (e.g., by detecting and / or decoding the signaling). An example of signaling may be a reference signal sent by NT-TRP 172 and / or T-TRP 170. In some embodiments, the processor 210 implements transmit beamforming and / or receive beamforming according to an indication of a beam direction received from the T-TRP 170, such as beam angle information (BAI). In some embodiments, the processor 210 may perform operations related to network access (e.g., initial access) and / or downlink synchronization, such as operations related to detecting a synchronization sequence, decoding, and obtaining system information. In some embodiments, the processor 210 may perform channel estimation, for example, using a reference signal received from the NT-TRP 172 and / or the T-TRP 170.

[0062] Although not shown, the processor 210 may constitute a part of the transmitter 201 and / or a part of the receiver 203. Although not shown, the memory 208 may constitute a part of the processor 210.

[0063] The processor 210, the processing components of the transmitter 201, and the processing components of the receiver 203 may all be implemented by the same or different one or more processors, which are used to execute instructions stored in a memory (e.g., the memory 208). Alternatively, some or all of the processor 210, the processing components of the transmitter 201, and the processing components of the receiver 203 may be implemented using a programmed field-programmable gate array (FPGA), a graphical processing unit (GPU), or an application-specific integrated circuit (ASIC).

[0064] In some implementations, T-TRP 170 may have other names, such as base station, base transceiver station (BTS), wireless base station, network node, network device, network side device, sending / receiving node, NodeB, evolved NodeB (eNodeB or eNB), home eNodeB, next generation NodeB (gNB), transmission point (TP), site controller, access point (AP), wireless router, relay station, remote radio head, ground node, ground network device, ground base station, base band unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), centralized unit (CU), distributed unit (DU), positioning node, etc. T-TRP 170 can be a macro BS, a micro BS, a relay node, a host node, etc., or a combination thereof. T-TRP 170 may refer to the above-mentioned device or a means in the above-mentioned device (eg, a communication module, a modem, or a chip).

[0065] In some embodiments, various parts of T-TRP 170 may be distributed. For example, some modules of T-TRP 170 may be located at the far end of the device that houses antenna 256 of T-TRP 170, and may be coupled to the device that houses antenna 256 through a communication link (not shown) sometimes called a fronthaul, such as a common public radio interface (CPRI). Therefore, in some embodiments, the term T-TRP 170 may also refer to modules on the network side that perform processing operations such as ED 110 location determination, resource allocation (scheduling), message generation, and encoding / decoding, which are not necessarily part of the device that houses antenna 256 of T-TRP 170. These modules may also be coupled to other T-TRPs. In some embodiments, T-TRP 170 may actually be multiple T-TRPs that operate together to serve ED 110, for example, by using coordinated multi-point transmission.

[0066] The T-TRP 170 includes at least one transmitter 252 and at least one receiver 254 coupled to one or more antennas 256. Only one antenna 256 is shown. Alternatively, one, some, or all of the antennas 256 may be panels. The transmitter 252 and the receiver 254 may be integrated into a transceiver. The T-TRP 170 also includes a processor 260 for performing operations, including operations related to: preparing transmissions for downlink transmission to the ED 110; processing uplink transmissions received from the ED 110; preparing transmissions for backhaul transmission to the NT-TRP 172; and processing transmissions received from the NT-TRP 172 in the backhaul. Processing operations related to preparing transmissions for downlink or backhaul transmissions may include operations such as encoding, modulation, precoding (e.g., multiple input multiple output (MIMO) precoding), transmit beamforming, and generating symbols for transmission. Processing operations related to processing received transmissions in the uplink or backhaul may include operations such as receive beamforming, demodulating received symbols, and decoding received symbols. The processor 260 may also perform operations related to network access (e.g., initial access) and / or downlink synchronization, such as generating the content of a synchronization signal block (SSB), generating system information, etc. In some embodiments, the processor 260 also generates an indication of a beam direction, such as a BAI, and the scheduler 253 may schedule the indication of the beam direction for transmission. The processor 260 performs other network-side processing operations described herein, such as determining the location of the ED 110, determining the deployment location of the NT-TRP 172, etc. In some embodiments, the processor 260 may generate signaling, such as to configure one or more parameters of the ED 110 and / or one or more parameters of the NT-TRP 172. Any signaling generated by the processor 260 is sent by the transmitter 252. It should be noted that the "signaling" used herein may also be referred to as control signaling. Dynamic signaling may be sent in a control channel such as a physical downlink control channel (PDCCH), and static or semi-static high-layer signaling may be included in a data packet sent in a data channel such as a physical downlink shared channel (PDSCH).

[0067] The scheduler 253 may be coupled to the processor 260. The scheduler 253 may be included in the T-TRP 170 or may operate separately. The scheduler 253 may schedule uplink, downlink, and / or backhaul transmissions, including issuing scheduling grants and / or configuring scheduling-free (“configured grants”) resources. The T-TRP 170 also includes a memory 258 for storing information and data. The memory 258 stores instructions and data used, generated, or collected by the T-TRP 170. For example, the memory 258 may store software instructions or modules for implementing some or all of the functions and / or embodiments described herein and executed by the processor 260.

[0068] Although not shown, the processor 260 may constitute a part of the transmitter 252 and / or a part of the receiver 254. In addition, although not shown, the processor 260 may implement the scheduler 253. Although not shown, the memory 258 may constitute a part of the processor 260.

[0069] The processor 260, the scheduler 253, the processing components of the transmitter 252, and the processing components of the receiver 254 may all be implemented by the same or different processors in one or more processors for executing instructions stored in a memory (e.g., the memory 258). Alternatively, some or all of the processor 260, the scheduler 253, the processing components of the transmitter 252, and the processing components of the receiver 254 may be implemented using dedicated circuits such as FPGAs, GPUs, or ASICs.

[0070] It should be noted that the NT-TRP 172 is shown as a drone only as an example, but the NT-TRP 172 can be implemented in any suitable non-ground form. In addition, in some implementations, the NT-TRP 172 may have other names, such as a non-ground node, a non-ground network device, or a non-ground base station. The NT-TRP 172 includes a transmitter 272 and a receiver 274 coupled to one or more antennas 280. Only one antenna 280 is shown. Alternatively, one, some or all of the antennas can be panels. The transmitter 272 and the receiver 274 can be integrated into a transceiver. The NT-TRP 172 also includes a processor 276 for performing operations, including operations related to: preparing transmissions for downlink transmission to the ED 110; processing uplink transmissions received from the ED 110; preparing transmissions for backhaul transmission to the T-TRP 170; and processing transmissions received from the T-TRP 170 in the backhaul. Processing operations associated with preparing transmissions for downlink or backhaul transmissions may include operations such as encoding, modulation, precoding (e.g., MIMO precoding), transmit beamforming, and generating symbols for transmission. Processing operations associated with processing received transmissions in the uplink or backhaul may include operations such as receive beamforming, demodulating received signals, and decoding received symbols. In some embodiments, the processor 276 implements transmit beamforming and / or receive beamforming based on beam direction information (e.g., BAI) received from the T-TRP 170. In some embodiments, the processor 276 may generate signaling, such as to configure one or more parameters of the ED 110. In some embodiments, the NT-TRP 172 implements physical layer processing, but does not implement higher-level functions such as functions of the medium access control (MAC) or radio link control (RLC) layer. Since this is only an example, more generally, the NT-TRP 172 may implement higher-level functions in addition to physical layer processing.

[0071] NT-TRP 172 also includes a memory 278 for storing information and data. Although not shown, processor 276 may constitute a part of transmitter 272 and / or a part of receiver 274. Although not shown, memory 278 may constitute a part of processor 276.

[0072] Processor 276, the processing components of transmitter 272, and the processing components of receiver 274 may all be implemented by the same or different one or more processors that execute instructions stored in a memory (e.g., memory 278). Alternatively, some or all of processor 276, the processing components of transmitter 272, and the processing components of receiver 274 may be implemented using dedicated circuits such as FPGAs, GPUs, or ASICs. In some embodiments, NT-TRP 172 may actually be multiple NT-TRPs that operate together to serve ED 110, for example, via coordinated multi-point transmission.

[0073] The T-TRP 170, NT-TRP 172, and / or ED 110 may include other components, but these components have been omitted for clarity.

[0074] One or more steps of the exemplary methods provided herein may be performed by Figure 4 The corresponding unit or module is executed. Figure 4 Units or modules in devices such as ED 110, T-TRP 170, or NT-TRP 172 are shown. For example, a signal can be sent by a sending unit or a sending module. A signal can be received by a receiving unit or a receiving module. A signal can be processed by a processing unit or a processing module. Other steps can be performed by an artificial intelligence (AI) module or a machine learning (ML) module. The corresponding units or modules can be implemented using hardware, one or more components or devices that execute software, or a combination thereof. For example, one or more units or modules can be integrated circuits such as FPGAs, GPUs, ASICs, etc. It should be understood that if these modules are implemented, for example, using software executed by a processor, these modules can be retrieved by the processor in whole or in part as needed, retrieved individually or collectively for processing, retrieved in one or more instances, and these modules themselves can include instructions for further deployment and instantiation.

[0075] Other details about ED 110, T-TRP 170 and NT-TRP 172 are known to those skilled in the art. Therefore, these details are omitted here.

[0076] The embodiments disclosed herein generally relate to phase tracking reference signals for overlapping UEs or other multi-UE scenarios.

[0077] At least the above points out the challenges brought to PT-RS implementation due to ISI, especially IQ interference. Figure 5 The IQ interference to the real PT-RS symbol is shown. Figure 5On the left side of , the "r" and "i" labels indicate the real and imaginary symbols of SC-OQAM, which are alternating. Symbol 510 is a PT-RS symbol and the other symbols are data symbols. Once these symbols are pulse shaped, the resulting symbols are displayed on the right, where the upper column represents IQ interference. The IQ interference to the PT-RS symbol is marked as 520, and the other upper columns represent IQ interference to the data symbol. The IQ interference 520 to the PT-RS symbol is a function of the data, which means that the receiver knows nothing about the IQ interference and cannot find the resulting PT-RS symbol to estimate the PN.

[0078] IQ interference 520 may be reduced in a single UE environment by using auxiliary PT-RS symbols such as auxiliary PT-RS symbols before or after PT-RS symbol 510, thereby eliminating IQ interference 520. This approach may be suitable for a single UE environment, but consider Figure 6 , which shows multi-UE interference to PT-RS symbols. In this example, it is assumed that the design of PT-RS is similar to Figure 5 However, in the presence of multiple UEs ( Figure 6 In the case of UE 0, UE 1, UE 2 in FIG. 6 , multi-UE interference may occur at least at the receiver. The multi-UE interference to PT-RS symbol 610 is shown at 620 and may cause the receiver to incorrectly estimate PN.

[0079] According to the embodiments disclosed herein, pulses or pulse types with two different pulse shapes are used at the transmitter. These pulses include a pulse denoted as F PTRP The first pulse for PT-RS generation or design, and the second pulse for data and PT-RS transmission, denoted as F. Therefore, F PTRS A pulse or pulse shape is defined, specified, or characterized for use in PT-RS generation or design and is different from the pulse shape used for data and PT-RS symbol transmission. PTRS and its length L is used by both the transmitter and the receiver, and can be distributed using signaling between communication devices, for example, from a network device such as a base station to a UE.

[0080] In the present invention, the terms pulse, pulse shape, pulse shaping, filter and filtering can all be used to refer to the same type of frequency domain processing. For example, by filtering, a pulse or pulse shape can be applied, and pulse shaping can also be performed. At least F is introduced above as the first pulse for data and PT-RS transmission, and at least F is introduced above PTRS As used for F PTRS The PT-RS generates or designs a second pulse. Additionally or alternatively, F and F PTRScan be called a filter. For example, F and F PTRS The elements of can be called pulse shaping coefficients, filter coefficients or filter coefficients.

[0081] Figure 7 A block diagram of an exemplary transmitter is shown. The exemplary transmitter generator 700 includes a PT-RS generator 702, a multiplexer 704, a discrete Fourier transform (DFT) block 706, a pulse shaper 708 that applies frequency domain spectral shaping (FDSS) in the example shown, a subcarrier mapper 710, an inverse DFT (IDFT) block 712, and a cyclic prefix (CP) inserter 714 interconnected as shown. Other embodiments may include additional, fewer, or different elements interconnected in a similar or different manner.

[0082] Figure 7 The elements shown may be implemented in any of a variety of ways, such as in hardware, firmware, or one or more components of software execution. The present invention is not limited to any particular type of implementation, for example, implementation details may vary from device to device. Each element in the examples shown may be configured to implement various functions or operations, such as by executing software.

[0083] The PT-RS generator 702 is used to use F PTRS Generate PT-RS symbols and auxiliary PT-RS symbols. PTRS Pulse, PT-RS generation can eliminate IQ interference, fix IQ interference to a known value, or optimize IQ interference, thereby facilitating interference estimation. The multiplexer is used to multiplex PT-RS symbols and data symbols. The DFT block 706 is used to convert the multiplexed symbols from the time domain to the frequency domain by performing a DFT operation, and the pulse shaper 708 is used to pulse shape the frequency domain signal using a pulse shaping filter F.

[0084] The subcarrier mapper 710 is used to map the PT-RS and data to the subcarriers. The IDFT block 712 is used to create a time domain signal by converting the mapped symbols from the frequency domain to the time domain, in particular by performing an IDFT operation in the example transmitter 700. The CP inserter 714 is used to insert a CP before the baseband signal is output, up-converted to a radio frequency (RF), and transmitted.

[0085] In the exemplary transmitter 700, there are two main pulse shaping features, including the use of F PTRSThe pulse is pulse-shaped for PT-RS generation, and the pulse-shaping filter F is used to perform pulse shaping for data and PT-RS transmission. Figure 8 These two pulse shaping features are shown.

[0086] exist Figure 8 In , 820 represents a PT-RS symbol, 810 represents an auxiliary PT-RS symbol, and the other symbols are data symbols. Figure 8 , 830 represents the pulse shaping applied to PT-RS generation (e.g., by 702). In some embodiments, including the illustrated example, this type of pulse shaping involves pulses or pulse shapes that are substantially rectangular pulses. Pulse shaping (e.g., by 708) for transmitting data and PT-RS symbols (described in more detail below) is shown in dashed lines at 840 for comparison purposes only.

[0087] In an embodiment of the present invention, the pulse shaping of PT-RS involves a filter F PTRS , the filter is used at the transmitter to generate at least one (ie, one or both) of the PT-RS symbol 820 and the auxiliary PT-RS symbol 810, which will be the data and the filter F PTRS function. Figure 8 The top example shows that if the transmitter uses the same pulse shaping (filter F PTRS ) to send PT-RS and data, there is no interference at 850. In practice, the transmitter will not use F PTRS Pulse shaping is performed on the multiplexed symbols, but using Figure 8 The lower part at 860 shows different pulse shaping involving different filters F, which may have a larger pulse shape than F. PTRS Better PAPR performance. Since the transmitter uses F to perform pulse shaping on the multiplexed symbols, and the PT-RS (810 and / or 820) is based on F PTRS is generated, thus generating interference as shown in 870. However, when using F PTRS This is not a problem at the receiver as a matched filter is used to separate the PT-RS symbols 820. Therefore, the impact of interference 870 that might otherwise affect the PT-RS symbols 820 (if only transmission pulse shaping as shown in 860 is used at the receiver without F-based pulse shaping) can be reduced or avoided. PTRS PT-RS generation and matched filtering).

[0088] Fig. 9900 includes a CP remover 902, a DFT block 904, a subcarrier demapper 906, an equalizer 908, a channel estimator 910, a pulse shaper labeled as FDSS blocks 912, 914, IDFT blocks 916, 918, a post-processor 920, a data separator 922, a PT-RS separator 924, a phase error estimator 926, and a phase error corrector 928 interconnected as shown. Other embodiments may include additional, fewer, or different elements interconnected in a similar or different manner.

[0089] Fig. 9 The elements shown may be implemented in any of a variety of ways, such as in hardware, firmware, or one or more components of executing software. As mentioned elsewhere herein, the present invention is not limited to any particular type of implementation, for example, implementation details may vary from device to device.

[0090] Receiver operations may include removing CP, converting to the frequency domain through DFT operations, subcarrier demapping and demultiplexing of data signals and reference signals, estimating channels, equalizing data signals based on channel estimation results, and performing additional processing related to phase error correction. Each element in the illustrated example is configured to implement various functions or operations, for example, by executing software.

[0091] In the exemplary receiver 900, the CP remover 902 is used to remove the cyclic prefix. The DFT block 904 is used to perform a DFT operation to convert the received time domain signal into a frequency domain signal. The subcarrier demapper 906 is used to perform subcarrier demapping. The equalizer 908 is used to equalize the data portion of the output of the subcarrier demapper 906. The channel estimator 912 is used to process the reference signal portion of the output of the subcarrier demapper 906 to generate a channel estimation result provided to the equalizer 908.

[0092] In order to estimate the phase error caused by phase noise, the pulse shaper 914 is used to adjust the phase error according to the PT-RS pulse shaping filter F PTRS Matched filtering is performed. IDFT block 918 is used to perform frequency domain to time domain conversion, and PT-RS separator 924 is used to separate PT-RS symbols from data symbols so that the phase error caused by phase noise can be estimated by phase error estimator 926. Elements 912, 916, 920 and 922 are used to perform matched filtering according to data transmission pulse shaping, frequency domain to time domain conversion, post-processing based on processing performed at the transmitter, and data separation, respectively. Phase error corrector 928 is used to correct the phase error in the data symbol according to the phase error estimated by phase error estimator 926.

[0093] Fig.10Receiver separation of PT-RS symbols is shown as a visual representation of receiver PT-RS processing at 914, 918, and 924. Pulse shape 1030 is applied to PT-RS matched filtering, and the pulse shape is different from the data transmission pulse shape 1040, so in the example shown, IQ interference to PT-RS symbol 1020 is cancelled. Fig.10 1050 in φ indicates that there is no interference to the PT-RS symbol 1020. In other embodiments, PT-RS generation fixes the IQ interference to a known value.

[0094] There are several pulse shaping filters F PTRS Method for generating PT-RS symbols. Consider Fig.11 , which shows the data symbol, the real PT-RS symbol a and the adjacent PT-RS symbol Fig.11 ib1, ib2. This is by way of example only. In another embodiment, the PT-RS symbol is an imaginary number and the auxiliary PT-RS symbol is a real number. More generally, in some embodiments, the PT-RS symbol has a real value and one or more auxiliary PT-RS symbols adjacent to the PT-RS symbol have an imaginary value, while in other embodiments, the PT-RS symbol has an imaginary value and one or more auxiliary PT-RS symbols adjacent to the PT-RS symbol have a real value.

[0095] The purpose of ib1 and ib2 is to "change", influence or control the inter-symbol interference (ISI) of the PT-RS symbols, for example to eliminate ISI or fix ISI to a known value. IQ interference is not specifically discussed here, but the more general ISI is referred to because F PTRS The pulse may not be a Nyquist pulse and the resulting interference may be complex interference rather than purely real or imaginary interference.

[0096] To explain ISI cancellation, consider frequency domain pulse shaping and time domain filtering. The FDSS operation is usually done in the frequency domain, while the equivalent operation can be done in the time domain. More specifically, FDSS is called multiplication in the frequency domain, while the equivalent time domain operation is circular convolution. In reality, what happens in the time domain is filtering, which is why pulse shaping and filtering are often referred to the same thing.

[0097] Assume that the length of the equivalent time domain filter is T1+T2+1, and its nth th The complex coefficient is f Rn +if In , where n∈{-T1,-T1+1,…,-1,0,1,2,…,T2}. The central coefficient of the filter is f R0 +if I0 .

[0098] exist Fig.11 In , the PT-RS symbol is denoted as a, and after filtering, the PT-RS symbol is affected by ISI. The ISI is a function of the filter, the auxiliary PT-RS symbol, and the data, as Fig.11 As shown, data is adjacent to each auxiliary PT-RS symbol. Let the ISI from “data” be I R +iI I The auxiliary PT-RS symbols are neighbor symbols, and the ISI generated by them is given by (f R(-1) +if I(-1) )ib1 and (f R1 +if I1 Based on this, the PT-RS symbol plus the ISI term can be expressed as

[0099] c=(f R0 +if I0 )a+(f R(-1) +if I(-1) )ib1+(f R1 +if I1 )ib2+I R +iI I

[0100] The auxiliary PT-RS symbol values ​​b1 and b2 can be selected to eliminate ISI so that

[0101] (f R(-1) +if I(-1) )ib1+(f R1 +if I1 )ib2+I R +iI I =0.

[0102] In this case, b1 and b2 are given by

[0103]

[0104] as well as

[0105]

[0106] Alternatively, the auxiliary PT-RS symbols b1 and b2 are determined or otherwise obtained to fix the ISI to a predefined value Q R +iQ I In this case, the value Q R +iQ I is known to both the transmitter and the receiver. Therefore, the known ISI in this example is

[0107] Q R+iQ I ,

[0108] Select, determine or otherwise obtain a, b1 and b2 to satisfy

[0109] (f R0 +if I0 )a+(f T(-1) +if I(-1) )ib1+(f R1 +if I1 )ib2+I R +iI I =Q R +iQ I .

[0110] As another example, consider Fig.12 , which is a time domain diagram showing a data symbol, a PT-RS symbol with a real value a, and an auxiliary PT-RS symbol with an imaginary value ib1 adjacent to the PT-RS symbol. Data symbols adjacent to the auxiliary PT-RS symbol and the PT-RS symbol are also shown.

[0111] In this example, using the same filter coefficients and ISI representation as in the previous example, the resulting PT-RS symbol after the receiver filtering operation can be represented as

[0112] c=(f R0 +if I0 )a+(f R(-1) +if I(-1) )ib1+I T +iI I .

[0113] Assume that only real ISI is eliminated and the receiver estimates virtual ISI and uses virtual ISI to estimate PN. In this case, the PT-RS symbol and virtual ISI are as follows:

[0114] c=(f R0 +if I0 )a+i(f R(-1) b1+I I )

[0115] as well as

[0116]

[0117] According to another embodiment, a and b1 are chosen to fix c to a certain predefined value known to the receiver.

[0118] The above examples illustrate possible ways to select secondary PT-RS symbols according to PT-RS pulse shaping in order to control ISI to the PT-RS symbols.

[0119] These and other embodiments disclosed herein may provide methods of generating PT-RS symbols according to a non-Nyquist PT-RS design pulse shape.

[0120] Regarding implementation, signaling may be exchanged between communication devices to cause a transmitting device to generate and transmit PT-RS symbols, and / or cause a receiving device to perform receiver processing in order to recover the PT-RS symbols and accurately estimate phase errors.

[0121] For example, the signaling may be different for a non-transparent receiver and a transparent receiver. For a non-transparent receiver, the receiver obtains information about the pulse shaping used by the transmitter, for example from signaling sent to the receiver and received by the receiver. For a transparent receiver, the receiver has no knowledge of the pulse shaping used by the transmitter and calculates, estimates or otherwise determines the transmitter pulse shaping in order to estimate the pulse and channel.

[0122] Fig.13 is a signal flow diagram for uplink transmission according to an embodiment. Fig.13 The features shown include transmitting signaling between a first communication device in the form of a BS and a UE and a second communication device at 1304, the signaling may be, for example, high-layer signaling. This transmission at 1304 involves the BS sending signaling to the UE and the UE receiving signaling from the BS. The signaling indicates information related to the first pulse shaping, Fig.13 The information associated with the first pulse shaping may be or include, for example, one or more filter coefficients of a pulse shaping filter, the length of the pulse shaping filter, or both the length of the pulse shaping filter and the one or more filter coefficients of the pulse shaping filter. Additionally or alternatively, the filter type may also be specified in such information.

[0123] Additionally or alternatively, the information associated with the first pulse shaping may specify whether the first pulse shaping is applied when generating the PT-RS. For example, in an embodiment, a plurality of filters for pulse shaping are available at the communication device. For example, the information associated with the filter may be sent by another communication device and received by the communication device, or the filter may be determined or otherwise obtained by the communication device. The information specifying whether a particular type of pulse shaping is applied when generating the PT-RS may, for example, specify whether the communication device overlaps with one or more other communication devices. The communication device may then select a type of pulse shaping or filter based on the received signaling to use a type of pulse shaping, such as the PT-RS pulse shaping disclosed herein, when the communication device overlaps with one or more other communication devices, and to use another type of pulse shaping, such as the same pulse shaping used for transmission, when the communication device does not overlap with any other communication device.

[0124] Therefore, the information associated with the first pulse shaping may be or include an indication of using an alternative PT-RS pulse, or an indication of overlap of communication devices such as a UE, or more generally, may be or include some form of information so that the communication device knows to use different PT-RS pulses if the communication devices overlap or if there is multi-device interference.

[0125] Radio resource control (RRC) signaling is an example of higher layer signaling that can be used to indicate such information.

[0126] At 1302, separate optional signaling is shown for indicating information associated with data transmission pulse shaping (also referred to herein as second pulse shaping). First pulse shaping and second pulse shaping, or Fig.13 The PT-RS pulse shaping and data transmission pulse shaping mentioned in the text are different. Figure 8 and Fig.10 As shown, the length of the PT-RS pulse shaping shown at 810 and 1030 can be different from the data transmission pulse shaping shown at 840 and 1040, for example, the length of the PT-RS pulse shaping shown at 810 and 1030 is shorter. The first pulse shaping and the second pulse shaping can involve the same or similar filter types, such as raised cosine or root raised cosine, but differ at least in length and can also involve different coefficients.

[0127] At 1306, an uplink grant is optionally transmitted between the BS and the UE by the BS sending grant signaling to the UE and the UE receiving grant signaling from the BS. Not all embodiments must be grant-based, so the uplink grant does not necessarily need to be transmitted at 1306.

[0128] At 1308, the UE generates a PT-RS, which is disclosed elsewhere herein. At 1312, Fig.13 Multiplexing data and PT-RS generated by the UE are shown, and other transmission side operations may also be performed, such as in the exemplary transmitter 700 ( Figure 7 ) to create symbols to be transmitted. At 1314, an uplink transmission from the UE to the BS is shown, which represents an example of a possible way to transmit PT-RS in a wireless communication network. In this example, transmitting PT-RS involves the UE sending PT-RS to the BS and the BS receiving PT-RS from the UE. The PT-RS can be included with the data (according to Fig.13 The PT-RS pulse shaping in the generated PT-RS and the second pulse shaping ( Fig.13 The data transmission pulse shaping in the data transmission (the pulse shaping) is sent by the pulse shaped PT-RS and the data.

[0129] As disclosed herein, a PT-RS is generated according to a pulse shaping that is different from a pulse shaping used to transmit the PT-RS and data. The PT-RS may be or include one or more PT-RS symbols and one or more auxiliary PT-RS symbols. For example, in an embodiment, the PT-RS is or includes a PT-RS symbol and two auxiliary PT-RS symbols adjacent to the PT-RS symbol, and the auxiliary PT-RS symbol is selected according to a first pulse shaping to control ISI to the PT-RS symbol. In another embodiment, the PT-RS is or includes a PT-RS symbol and an auxiliary PT-RS symbol adjacent to the PT-RS symbol, and the auxiliary PT-RS symbol is selected according to a first pulse shaping to control ISI to the PT-RS symbol. Control of ISI may, for example, reduce or eliminate ISI, or set ISI to a known value. At least reference is made above to Fig.11 and 12 Illustrative examples of possible ways to determine values ​​of PT-RS symbols and / or auxiliary PT-RS symbols are provided.

[0130] At 1316, Fig.13 It is shown that the BS estimates and corrects the PN using the PT-RS, and decodes the data.

[0131] Fig.14 FIG. 4 is a signal flow diagram for uplink transmission according to another embodiment. Fig.14 The example in is similar to Fig.12 , but involves transmitting signaling by sending signaling from the UE to the BS and receiving signaling from the UE by the BS at 1404. In some embodiments, the uplink transmission may involve the UE selecting or otherwise obtaining PT-RS pulse shaping at 1404 and (possibly) at 1402, sending signaling indicating information associated with the PT-RS pulse shaping. The direction of the double arrows at 1402 is intended to illustrate that in some embodiments, the signaling may be transmitted in either or both directions from the UE to the BS and / or from the BS to the UE.

[0132] As an example of transmitting signaling from the UE to the BS at 1404, consider an embodiment in which the UE obtains PT-RS pulse shaping to be applied when generating the PT-RS. The UE may then send signaling at 1404 to indicate the PT-RS pulse shaping length and / or one or more coefficients to the BS so that the BS may perform matched filtering based on the PT-RS pulse shaping.

[0133] Fig.15 is a signal flow diagram for downlink transmission according to an embodiment. Fig.15 Features shown include transmitting signaling between the BS and the UE at 1504 and optionally at 1502. Fig.13As shown, such transmission at 1502, 1504 involves signaling sent by the BS to the UE and received by the UE from the BS. The signaling at 1504 indicates information associated with PT-RS pulse shaping, and the optional signaling at 1502 indicates information associated with data transmission pulse shaping.

[0134] At 1506, PT-RS generation at the BS is shown. At 1508, Fig.15 The multiplexing of data and the generated PT-RS by the BS is shown, and other transmission side operations may also be performed, such as in the exemplary transmitter 700 ( Figure 7 ) to create symbols to be transmitted. Downlink transmission from the BS to the UE is shown at 1512 and represents another example of a possible way to transmit PT-RS in a wireless communication network. In this example, transmitting the PT-RS involves the BS sending the PT-RS to the UE and the UE receiving the PT-RS from the BS. At 1514, Fig.15 The UE is shown performing PN estimation and correction using the PT-RS, and decoding data.

[0135] For downlink transmission, the PT-RS parameters may be selected or otherwise determined by the BS. However, it is possible that the PT-RS parameters previously sent by the UE to the BS and received by the BS from the UE may be used by the BS when generating the PT-RS for downlink transmission. Therefore, even in the case of downlink transmission, signaling indicating information associated with PT-RS pulse shaping may involve transmitting signaling from the UE to the BS.

[0136] Fig.16 is a signal flow diagram for sidelink transmission according to an embodiment. Sidelink PT-RS transmission may be performed between two UEs still controlled by the BS. Fig.16 Features shown include transmitting signaling between the BS and a first UE, UE 1601, and between the BS and a second UE, UE 1603, at 1606, 1608, and optionally at 1602, 1604. The transmissions at 1602, 1606 involve the sending of signaling by the BS to UE 1601 and the receipt of signaling by UE 1601 from the BS. The transmissions at 1604, 1608 involve the sending of signaling by the BS to UE 1603 and the receipt of signaling by UE 1603 from the BS. The signaling at 1606, 1608 indicates information associated with PT-RS pulse shaping. The signaling at 1602, 1604 may indicate information associated with data transmission pulse shaping.

[0137] The generation of PT-RS by UE 1601 is shown at 1610 and involves PT-RS generation as disclosed elsewhere herein. At 1616, Fig.16The multiplexing of data and the generated PT-RS by UE 1601 is shown, and other transmission side operations may also be performed, such as in the exemplary transmitter 700 ( Figure 7 ) to create symbols to be transmitted. A sidelink transmission from UE 1601 to UE 1603 is shown at 1618 and represents one example of a possible way to transmit PT-RS in a wireless communication network. In this example, transmitting PT-RS involves UE 1601 sending PT-RS to UE 1603 and UE 1603 receiving PT-RS from UE 1601. At 1620, Fig.16 UE 1603 is shown performing PN estimation and correction using PT-RS, and decoding data.

[0138] In another embodiment for sidelink transmission, a transmitter UE (e.g., UE 1601) configures one or more parameters for PT-RS transmission and sends the parameters to a receiving UE (e.g., UE 1603) via sidelink control information (SCI) or PC5 (sidelink RRC). Fig.17 17 is a signal flow diagram for sidelink transmission according to another embodiment, involving signaling transmitted between UE 1701 and UE 1703.

[0139] Fig.17 The example in 1708 involves transmitting signaling indicating information associated with PT-RS pulse shaping (at 1708 and optionally at 1706), and possibly transmitting signaling indicating information associated with data transmission pulse shaping at 1702 and / or 1704. At 1704, 1708, transmitting signaling involves sending signaling by UE 1701 to UE 1703 and receiving signaling by UE 1703 from UE 1701. Sidelink transmissions may involve sending UE ( Fig.17 UE 1701 in the example selects or otherwise obtains, for example, a PT-RS pulse shaping filter type and length, and sends a signal to a receiving UE ( Fig.17 UE 1703) sends signaling.

[0140] As shown in the example Fig.17 As shown in , the embodiments involving signaling between UEs may or may not involve signaling between the BS and the UE. Fig.17 As shown at 1702 and 1706 in the figure, for sidelink transmission, PT-RS related operations can remain transparent to the BS, and the BS does not need to be informed of PT-RS parameters or transmit these parameters to UE 1701 at 1702 and 1706.

[0141] Figures 13 to 17Various embodiments are described. More generally, methods consistent with the present invention may involve transmitting signaling between a first communication device and a second communication device in a wireless communication network. From the perspective of one of these communication devices, for example, such a method performed by a first (or second) communication device involves transmitting signaling with a second (or first) communication device. The signaling indicates information associated with a first pulse shaping for PT-RS generation.

[0142] Transmitting signaling may involve sending signaling, receiving signaling, or both. Similarly, for example, transmitting PT-RS and data may involve sending PT-RS (and data), receiving PT-RS (and data), or both. For example, Figure 13 to Figure 17 An embodiment in which transmission signaling involves the following operations is shown, wherein any one or more of the operations may be provided or supported by different types of communication devices (e.g., UE or base station):

[0143] The UE receives signaling from a BS or another UE, as shown by way of example at 1302, 1304, 1402, 1502, 1504, 1602, 1604, 1606, 1608, 1702, 1704, 1706, 1708;

[0144] The BS receives signaling from the UE, as shown by way of example at 1402, 1404, 1702, 1706;

[0145] The UE sends signaling to the BS and / or another UE, as shown by way of example at 1402, 1404, 1702, 1704, 1706, 1708;

[0146] • The BS sends signaling to one or more UEs, as shown by way of example at 1302, 1304, 1402, 1502, 1504, 1602, 1604, 1606, 1608, 1702, 1706.

[0147] These examples illustrate that transmitting signaling may involve sending signaling by any of the various types of first communication devices (e.g., UE or base station or another network device) to any of the various types of second communication devices (e.g., UE or base station or another network device). Additionally or alternatively, transmitting signaling may involve receiving signaling at any of the various types of first communication devices (e.g., UE or base station or another network device) from any of the various types of second communication devices (e.g., UE or base station or another network device).

[0148] A method may also involve transmitting a PT-RS in a wireless communication network, for example by a first communication device or a second communication device. The PT-RS is generated according to a first pulse shaping, but may be sent with data, for example as a pulse-shaped PT-RS and data including the PT-RS and data to which a second pulse shaping different from the first pulse shaping disclosed herein has been applied.

[0149] Similar to transmitting signaling, transmitting PT-RS may involve sending PT-RS and, for example, data, by any of various types of communication devices (e.g., UE or base station or another network device) to any of various types of communication devices (e.g., UE or base station or another network device). Additionally or alternatively, transmitting PT-RS may involve receiving PT-RS at any of various types of communication devices (e.g., UE or base station or another network device) from any of various types of communication devices (e.g., UE or base station or another network device). Examples of transmitting PT-RS, including sending and receiving examples, are provided in Figures 13 to 17 As shown at 1314, 1512, and 1618.

[0150] A receiver or intended receiver (or receiving device) of a PT-RS may send or receive signaling before the PT-RS is received. Fig.13 In , the BS is an intended receiver of the PT-RS and may send signaling at 1304 and optionally at 1302, and then receive the PT-RS at 1314. Fig.14 In , the BS is an intended receiver of the PT-RS and may receive signaling at 1404, optionally send and / or receive signaling at 1402, and then receive the PT-RS at 1314. Fig.15 In , the UE is an intended receiver of the PT-RS and may receive the signaling at 1504 and optionally at 1502, and then receive the PT-RS at 1512. Fig.16 and 17 , UE 1603 or UE 1703 is the intended receiver of the PT-RS and may receive signaling at 1608 and optionally at 1604 (from the BS) or at 1708 and optionally at 1704 (from UE 1701) and then receive the PT-RS at 1618.

[0151] Similarly, the transmitter or intended transmitter (or transmitting device) of the PT-RS may send or receive signaling before the PT-RS is sent. Fig.13 In FIG. 1 , the UE is a transmitter of the PT-RS and may receive signaling at 1304 and optionally at 1302 and then transmit the PT-RS at 1314 . Fig.14In , the UE is also a transmitter of PT-RS, but can send signaling at 1404, optionally send and / or receive signaling at 1402, and then send PT-RS at 1314. Fig.15 In , the BS is a transmitter of PT-RS and may send signaling at 1504 and optionally at 1502, and then send PT-RS at 1512. Fig.16 and 17 , UE 1601 or UE 1701 is a transmitter of PT-RS and may receive signaling at 1606 and optionally at 1602, 1702, 1706 (from a BS), or may send signaling at 1708 and optionally at 1704 (to UE 1703) and optionally at 1702, 1706 (to a BS), and then send PT-RS at 1618.

[0152] In some embodiments, signaling and PT-RS (possibly multiplexed or otherwise combined with data) are provided as follows: Figures 13 to 15 As shown in FIG. 1 , the transmission between the transmitter and the intended receiver of the PT-RS is as follows: Fig.17 It is shown as being transmitted between UE 1701 and UE 1703. Thus, in the context of transmitting signaling between a first communications device and a second communications device, in such embodiments, transmitting a PT-RS involves transmitting a PT-RS between the first communications device and the second communications device.

[0153] Signaling and PT-RS do not necessarily need to be transmitted between the same devices. Fig.16 As an example. Signaling is transmitted between the BS and UE 1601 at 1606, and between the BS and UE 1603 at 1608, but the PT-RS is transmitted between UE 1601 and UE 1603 at 1618. This illustrates an embodiment in which the signaling and the PT-RS are not transmitted between the same devices. In the context of a first communication device transmitting signaling with a second communication device, in such embodiments, transmitting the PT-RS may involve transmitting the PT-RS by the first communication device (or the second communication device) and a third communication device in the wireless communication network.

[0154] These are all examples of transmitting signaling and transmitting PT-RS.

[0155] These method examples are illustrative and non-limiting embodiments and other embodiments may include additional or different features disclosed herein.

[0156] For example, Figures 13 to 17The above and subsequent examples are mainly in the context of generating and sending PT-RS by one communication device (e.g., one UE). However, the embodiments disclosed herein may be particularly useful in a multi-UE environment or for other applications where multiple communication devices generate and send PT-RS, such as Figure 6 and 10 Therefore, it should be understood that the features disclosed herein can be provided or supported by multiple communication devices. Figures 13 to 17 , for example, multiple UEs and / or BSs may generate and transmit PT-RS. Additionally or alternatively, a UE or BS may receive PT-RS from multiple other communication devices. Signaling indicating different pulse shaping may be sent or received by multiple communication devices (e.g., multiple UEs) that will transmit PT-RS. Similarly, signaling indicating different pulse shaping for multiple communication devices to transmit PT-RS may be sent or received by a communication device (e.g., a BS or another network device) that may receive PT-RS from multiple communication devices.

[0157] The present invention includes various embodiments, including not only method embodiments but also other embodiments, such as apparatus embodiments and embodiments involving non-transitory computer-readable storage media. The embodiments may include the features disclosed herein individually or in combination.

[0158] The apparatus may include a processor and a non-transitory computer-readable storage medium coupled to the processor, the non-transitory computer-readable storage medium storing a program executed by the processor. Figure 3 In the embodiment, the processors 210, 260, 276 may be or include one or more processors, and each memory 208, 258, 278 is an example of a non-transitory computer-readable storage medium in the ED 110 and the TRP 170, 172. For example, the non-transitory computer-readable storage medium is not necessarily used only in conjunction with the processor, but may also be used alone in a computer program product.

[0159] As an illustrative example, a program stored in or on a non-transitory computer-readable storage medium may include instructions for or for causing a processor to transmit signaling between a first communication device and a second communication device in a wireless communication network. The signaling may be transmitted by the first (or second) communication device and the second (or first) communication device. The signaling indicates information associated with the first pulse shaping.

[0160] The program may include instructions for or for causing the processor to transmit signaling through any one or more of the following operations: sending signaling from a first communication device to a second communication device; receiving signaling from a second communication device at the first communication device; sending signaling from the second communication device to the first communication device; and receiving signaling from the first communication device at the second communication device.

[0161] The program may include instructions for or for causing the processor to transmit data with a PT-RS generated according to the first pulse shaping in a wireless communication network through a first communication device as a pulse-shaped PT-RS and data including the PT-RS and data to which the second pulse shaping has been applied. The program may include instructions for or for causing the processor to transmit the PT-RS and data through the first communication device to the second communication device and / or the first communication device to the third communication device in the wireless communication network.

[0162] Additionally or alternatively, the program may include instructions for or for causing the processor to receive data with a PT-RS generated according to the first pulse shaping from the first communication device through the second communication device as a pulse-shaped PT-RS and data including the PT-RS and data to which the second pulse shaping has been applied.

[0163] Embodiments related to an apparatus or non-transitory computer-readable storage medium for UE or network device operation may include any one or more of the following features, such as those discussed elsewhere herein:

[0164] The information associated with the first pulse shaping is or includes one or more filter coefficients of a pulse shaping filter;

[0165] The information associated with the first pulse shaping is or includes the length of the pulse shaping filter;

[0166] The information associated with the first pulse shaping is or includes one or more filter coefficients of a pulse shaping filter and a length of the pulse shaping filter;

[0167] The information associated with the first pulse shaping specifies whether the first pulse shaping is applied when generating the PT-RS;

[0168] The PT-RS includes one or more PT-RS symbols and one or more auxiliary PT-RS symbols;

[0169] The PT-RS is or includes a PT-RS symbol and two auxiliary PT-RS symbols adjacent to the PT-RS symbol, and the auxiliary PT-RS symbol is selected according to the first pulse shaping to control ISI to the PT-RS symbol;

[0170] The PT-RS includes a PT-RS symbol and an auxiliary PT-RS symbol adjacent to the PT-RS symbol, wherein the auxiliary PT-RS symbol is selected according to a first pulse shaping to control inter-symbol interference (ISI) of the PT-RS symbol.

[0171] Although the present invention has been described with reference to illustrative embodiments, the description is not intended to be interpreted in a limiting sense. Various modifications and combinations of the illustrative embodiments and other embodiments of the present invention will be apparent to those skilled in the art with reference to this specification. Therefore, the appended claims are intended to cover any such modifications or embodiments.

[0172] Additionally or alternatively, features disclosed, for example, in the context of method embodiments may be implemented in apparatus or computer program product embodiments. Additionally, while embodiments are primarily described in the context of methods and apparatus, other implementations are also contemplated, for example, as instructions stored on one or more non-transitory computer-readable media. Such media may store programs or instructions to perform any of a variety of methods consistent with the present invention.

[0173] The illustrative embodiments disclosed herein are primarily directed to PT-RS. Additionally or alternatively, the same or similar embodiments may be applied to other types of reference signals used for channel estimation.

[0174] Although various aspects of the present invention have been described with reference to specific features and embodiments of the present invention, various modifications and combinations of the present invention may be formulated without departing from the present invention. Therefore, the specification and the drawings are only regarded as an illustration of some embodiments of the present invention as defined by the appended claims, and are conceived to cover any and all modifications, variants, combinations or equivalents within the scope of the present invention. Therefore, although the embodiments and potential advantages have been described in detail, various changes, substitutions and modifications may be made herein without departing from the present invention as defined by the appended claims. In addition, the scope of the present application is not intended to be limited to the specific embodiments of the processes, machines, manufactured products, material compositions, components, methods and steps described in the specification. It should be easy for a person of ordinary skill in the art to understand from the disclosure of the present invention that existing or to be developed processes, machines, manufactured products, material compositions, components, methods or steps that perform substantially the same functions as the corresponding embodiments described herein or obtain substantially the same results as the embodiments may be utilized according to the present invention. Therefore, the appended claims are intended to include these processes, machines, manufactured products, material compositions, components, methods or steps within their scope.

[0175] In addition, any module, component or device for executing instructions illustrated herein may include or otherwise access a non-transitory computer-readable or processor-readable storage medium to store information, such as computer-readable or processor-readable instructions, data structures, program modules and / or other data. A non-exhaustive list of examples of non-transitory computer-readable or processor-readable storage media includes a cassette, a magnetic tape, a disk storage or other magnetic storage device, a compact disc read-only memory (CD-ROM), a digital video disc or a digital versatile disc (DVD), an optical disc such as a Blu-ray disc, or other optical storage, volatile and non-volatile, removable and non-removable media implemented in any method or technology, random-access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology. Any such non-transitory computer-readable or processor-readable storage medium may be part of a device, or may be accessed by a device or connected to a device. Any application or module described herein may be implemented using computer or processor readable and executable instructions, which may be stored or otherwise maintained by such non-transitory computer-readable or processor-readable storage media.

Claims

1. A method, characterized in that include: transmitting, by the first communication device and the second communication device, signaling indicative of information associated with the first pulse shaping in a wireless communication network; The first communication device transmits data with a phase tracking reference signal (PT-RS) generated according to the first pulse shaping in the wireless communication network as a pulse-shaped PT-RS and data including the PT-RS and the data to which the second pulse shaping has been applied.

2. The method according to claim 1, characterized in that The information associated with the first pulse shaping comprises one or more filter coefficients of a pulse shaping filter.

3. The method according to claim 1, characterized in that The information associated with the first pulse shaping includes a length of a pulse shaping filter.

4. The method according to claim 2, characterized in that: The information associated with the first pulse shaping also includes a length of the pulse shaping filter.

5. The method according to any one of claims 1 to 4, characterized in that The information associated with the first pulse shaping specifies whether to apply the first pulse shaping when generating the PT-RS.

6. The method according to any one of claims 1 to 5, characterized in that The PT-RS includes one or more PT-RS symbols and one or more auxiliary PT-RS symbols.

7. The method according to claim 6, characterized in that The PT-RS includes a PT-RS symbol and two auxiliary PT-RS symbols adjacent to the PT-RS symbol, wherein the auxiliary PT-RS symbol is selected according to the first pulse shaping to control inter-symbol interference (ISI) to the PT-RS symbol.

8. The method according to claim 6, characterized in that The PT-RS includes a PT-RS symbol and an auxiliary PT-RS symbol adjacent to the PT-RS symbol, wherein the auxiliary PT-RS symbol is selected according to the first pulse shaping to control inter-symbol interference (ISI) of the PT-RS symbol.

9. The method according to any one of claims 1 to 8, characterized in that Transmitting signaling includes sending the signaling from the first communication device to the second communication device.

10. The method according to any one of claims 1 to 8, characterized in that Transmitting signaling includes receiving the signaling at the first communication device from the second communication device.

11. The method according to any one of claims 1 to 8, characterized in that Sending the PT-RS and the data includes the first communication device sending the PT-RS and the data to the second communication device.

12. The method according to any one of claims 1 to 8, characterized in that Sending the PT-RS and the data includes the first communication device sending the PT-RS and the data to a third communication device in the wireless communication network.

13. A method, characterized in that include: transmitting, by the second communication device and the first communication device, signaling indicative of information associated with the first pulse shaping in a wireless communication network; Data with a phase tracking reference signal (PT-RS) generated according to the first pulse shaping is received by the second communication device from the first communication device as a pulse-shaped PT-RS and data including the PT-RS and data to which the second pulse shaping has been applied.

14. The method according to claim 13, characterized in that The information associated with the first pulse shaping comprises one or more filter coefficients of a pulse shaping filter.

15. The method according to claim 13, characterized in that The information associated with the first pulse shaping includes a length of a pulse shaping filter.

16. The method according to claim 14, characterized in that The information associated with the first pulse shaping also includes a length of the pulse shaping filter.

17. The method according to any one of claims 13 to 16, characterized in that The information associated with the first pulse shaping specifies whether to apply the first pulse shaping when generating the PT-RS.

18. The method according to any one of claims 13 to 17, characterized in that The PT-RS includes one or more PT-RS symbols and one or more auxiliary PT-RS symbols.

19. The method according to claim 18, characterized in that The PT-RS includes a PT-RS symbol and two auxiliary PT-RS symbols adjacent to the PT-RS symbol, wherein the auxiliary PT-RS symbol is selected according to the first pulse shaping to control inter-symbol interference (ISI) to the PT-RS symbol.

20. The method according to claim 18, characterized in that The PT-RS includes a PT-RS symbol and an auxiliary PT-RS symbol adjacent to the PT-RS symbol, wherein the auxiliary PT-RS symbol is selected according to the first pulse shaping to control inter-symbol interference (ISI) of the PT-RS symbol.

21. The method according to any one of claims 13 to 20, characterized in that Transmitting signaling includes the second communication device sending the signaling to the first communication device.

22. The method according to any one of claims 13 to 20, characterized in that Transmitting signaling includes the second communications device receiving the signaling from the first communications device.

23. A device, characterized in that: include: processor; A non-transitory computer-readable storage medium coupled to the processor and storing a program executed by the processor, the program including instructions for: transmitting, by the first communication device and the second communication device, signaling indicative of information associated with the first pulse shaping in a wireless communication network; The first communication device transmits data with a phase tracking reference signal (PT-RS) generated according to the first pulse shaping in the wireless communication network as a pulse-shaped PT-RS and data including the PT-RS and the data to which the second pulse shaping has been applied.

24. The device according to claim 23, characterized in that The information associated with the first pulse shaping comprises one or more filter coefficients of a pulse shaping filter.

25. The device according to claim 23, characterized in that The information associated with the first pulse shaping includes a length of a pulse shaping filter.

26. The device according to claim 24, characterized in that The information associated with the first pulse shaping also includes a length of the pulse shaping filter.

27. The device according to any one of claims 23 to 26, characterized in that The information associated with the first pulse shaping specifies whether to apply the first pulse shaping when generating the PT-RS.

28. The device according to any one of claims 23 to 27, characterized in that The PT-RS includes one or more PT-RS symbols and one or more auxiliary PT-RS symbols.

29. The device according to claim 28, characterized in that The PT-RS includes a PT-RS symbol and two auxiliary PT-RS symbols adjacent to the PT-RS symbol, wherein the auxiliary PT-RS symbol is selected according to the first pulse shaping to control inter-symbol interference (ISI) to the PT-RS symbol.

30. The device according to claim 28, characterized in that The PT-RS includes a PT-RS symbol and an auxiliary PT-RS symbol adjacent to the PT-RS symbol, wherein the auxiliary PT-RS symbol is selected according to the first pulse shaping to control inter-symbol interference (ISI) of the PT-RS symbol.

31. The device according to any one of claims 23 to 30, characterized in that The program includes instructions for transmitting the signaling by sending the signaling from the first communication device to the second communication device.

32. The device according to any one of claims 23 to 30, characterized in that The program includes instructions for transmitting the signaling by receiving the signaling at the first communication device from the second communication device.

33. The device according to any one of claims 23 to 30, characterized in that The program includes instructions for transmitting the PT-RS and data by the first communication device to the second communication device.

34. The device according to any one of claims 23 to 30, characterized in that The program includes instructions for transmitting the PT-RS and data by the first communication device to a third communication device in the wireless communication network.

35. A device, characterized in that: include: processor; A non-transitory computer-readable storage medium coupled to the processor and storing a program executed by the processor, the program including instructions for: transmitting, by the second communication device and the first communication device, signaling indicative of information associated with the first pulse shaped communication in a wireless communication network; Data with a phase tracking reference signal (PT-RS) generated according to the first pulse shaping is received by the second communication device from the first communication device as a pulse-shaped PT-RS and data including the PT-RS and data to which the second pulse shaping has been applied.

36. The device according to claim 35, characterized in that The information associated with the first pulse shaping comprises one or more filter coefficients of a pulse shaping filter.

37. The device according to claim 35, characterized in that The information associated with the first pulse shaping includes a length of a pulse shaping filter.

38. The device according to claim 36, characterized in that The information associated with the first pulse shaping also includes a length of the pulse shaping filter.

39. The device according to any one of claims 35 to 38, characterized in that The information associated with the first pulse shaping specifies whether to apply the first pulse shaping when generating the PT-RS.

40. The device according to any one of claims 35 to 39, characterized in that The PT-RS includes one or more PT-RS symbols and one or more auxiliary PT-RS symbols.

41. The device according to claim 40, characterized in that The PT-RS includes a PT-RS symbol and two auxiliary PT-RS symbols adjacent to the PT-RS symbol, wherein the auxiliary PT-RS symbol is selected according to the first pulse shaping to control inter-symbol interference (ISI) to the PT-RS symbol.

42. The device according to claim 40, characterized in that The PT-RS includes a PT-RS symbol and an auxiliary PT-RS symbol adjacent to the PT-RS symbol, wherein the auxiliary PT-RS symbol is selected according to the first pulse shaping to control inter-symbol interference (ISI) of the PT-RS symbol.

43. The device according to any one of claims 35 to 42, characterized in that The program includes instructions for transmitting the signaling by sending the signaling to the first communication device through the second communication device.

44. The device according to any one of claims 35 to 42, characterized in that The program includes instructions for transmitting the signaling by receiving the signaling from the first communication device through the second communication device.

45. A computer program product, characterized in that A non-transitory computer readable medium comprising a program storing the program, the program comprising instructions for: transmitting, by the first communication device and the second communication device, signaling indicative of information associated with the first pulse shaping in a wireless communication network; The first communication device transmits data with a phase tracking reference signal (PT-RS) generated according to the first pulse shaping in the wireless communication network as a pulse-shaped PT-RS and data including the PT-RS and the data to which the second pulse shaping has been applied.

46. ​​A computer program product, characterized in that A non-transitory computer readable medium comprising a program storing the program, the program comprising instructions for: transmitting, by the second communication device and the first communication device, signaling indicative of information associated with the first pulse shaped communication in a wireless communication network; The first communication device transmits data with a phase tracking reference signal (PT-RS) generated according to the first pulse shaping in the wireless communication network as a pulse-shaped PT-RS and data including the PT-RS and the data to which the second pulse shaping has been applied.

47. A computer program product, characterized in that A non-transitory computer-readable medium comprising a program storing the program, the program comprising instructions for executing the method according to any one of claims 1 to 22.

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