DETERMINATION OF MULTIPLEXING PATTERNS BASED ON SUBCARRIER SEPARATION VALUES

Abstract

Apparatus, methods, and systems for determining multiplexing patterns based on subcarrier separation values ​​are disclosed. One method (900) includes receiving (902) an indication of a separation value for the first subcarrier. One method (900) includes receiving (904) a configuration for a demodulation reference signal. One method (900) includes determining (906) a multiplexing pattern for the demodulation reference signal and / or a number of demodulation reference signal ports for the demodulation reference signal by comparing the separation value of the first subcarrier with a separation value of the second subcarrier.

Description

DETERMINATION OF MULTIPLEXING PATTERNS BASED ON SUBCARRIER SEPARATION VALUES CROSS REFERENCE TO RELATED APPLICATIONS This application claims priority of United States patent application serial number 62 / 988,136 entitled APPARATUS, METHODS AND SYSTEMS FOR REFERENCE SIGNAL CONFIGURATIONS FOR CHANNEL ESTIMATION AND PHASE TRACKING FOR A GREATER SUBCARRIER SEPARATION and filed on March 11, 2020 for Ankit Bhamri, which is incorporated herein by reference in its entirety. FIELD The topic described in this document refers in general to wireless communications and more particularly to the determination of the multiplexing pattern based on the separation values ​​of the subcarriers. BACKGROUND In certain wireless communication networks, changes in subcarrier spacing can affect the design and / or performance of transmissions. For example, changes in subcarrier spacing can affect demodulation reference signals and / or phase-tracking reference signals. BRIEF DESCRIPTION Methods for determining multiplexing patterns based on subcarrier spacing values ​​are described. Apparatus and systems also perform the functions of these methods. One modality of a method includes receiving an indication of the spacing value of the first subcarrier. In some modalities, the method includes receiving a configuration for a demodulation reference signal. In certain modalities, the method includes determining a multiplexing pattern for the demodulation reference signal and / or a number of demodulation reference signal ports by comparing the spacing value of the first subcarrier with a spacing value of the second subcarrier. An apparatus for determining the multiplexing pattern based on subcarrier spacing values ​​includes a receiver that: receives an indication of a first subcarrier spacing value; and receives a configuration for a demodulation reference signal. In various embodiments, the apparatus includes a processor that determines a multiplexing pattern for the demodulation reference signal and / or a number of demodulation reference signal ports for the demodulation reference signal by comparing the spacing value of the first subcarrier with a spacing value of the second subcarrier. Another embodiment of a method for determining the multiplexing pattern based on subcarrier spacing values ​​includes receiving an indication of a first subcarrier spacing value. In some embodiments, the method includes receiving a configuration for a demodulation reference signal. In certain embodiments, the method includes determining a multiplexing pattern in the frequency domain for phase-tracking reference signals by comparing the spacing value of the first subcarrier with a spacing value of the second subcarrier. Another apparatus for determining the multiplexing pattern based on subcarrier separation values ​​includes a receiver that: receives an indication of a first subcarrier separation value; and receives a configuration for a demodulation reference signal. In various configurations, the apparatus includes a processor that determines a frequency-domain multiplexing pattern for phase-tracking reference signals by comparing the separation value of the first subcarrier with a separation value of the second subcarrier. BRIEF DESCRIPTION OF THE DRAWINGS A more detailed description of the modalities briefly described above will be provided with reference to the specific modalities illustrated in the accompanying drawings. It is understood that these drawings represent only some of the modalities and are therefore not considered to limit their scope. The modalities will be described and explained with additional specificity and detail through the use of the accompanying drawings, in which: Figure 1 is a schematic block diagram illustrating one modality of a wireless communication system for determining multiplexing patterns based on subcarrier separation values. Figure 2 is a schematic block diagram illustrating one modality of an apparatus that can be used for determining multiplexing patterns based on subcarrier separation values. Figure 3 is a schematic block diagram illustrating one modality of an apparatus that can be used for determining multiplexing patterns based on subcarrier separation values. Figure 4 is a diagram illustrating one-way reference signals as a function of SCS. Figure 5 is a diagram that illustrates another way of showing reference signals as a function of SCS. Figure 6 is a diagram that illustrates one method of determining a function value F. Figure 7 is a diagram illustrating one-way reference signals as a function of F. Figure 8 is a diagram that illustrates another way of showing the reference signals as a function of F. Figure 9 is a block diagram illustrating one modality of a method for determining multiplexing patterns based on subcarrier separation values. Figure 10 is a block diagram illustrating another modality of a method for determining multiplexing patterns based on subcarrier separation values. DETAILED DESCRIPTION As an expert in the field will appreciate, aspects of modalities can be represented as a system, apparatus, method, or program product. Accordingly, modalities can take the form of a purely hardware modality, a purely software modality (including firmware, resident software, microcode, etc.), or a modality that combines software and hardware aspects, which can generally be referred to here as a circuit, module, or system. Furthermore, modalities can take the form of a program product embedded in one or more computer-readable storage devices that store computer-readable code, program code, and / or program code, hereinafter referred to as code. The storage devices may be tangible, non-transient, and / or non-transmittable. The storage devices may not incorporate signals.In a certain mode, storage devices only use signals to access the code. Some of the functional units described in this specification may be labeled as modules to further emphasize their implementation independence. For example, a module may be implemented as a hardware circuit comprising custom very-large-scale integration (VLSI) circuits or gate assemblies, off-the-shelf semiconductors such as logic chips, transistors, or other discrete components. A module may also be implemented on programmable hardware devices such as field-programmable gate arrays, programmable array logic, programmable logic devices, or similar. Modules can also be implemented in code and / or software for execution by various types of processors. An identified code module may, for example, include one or more physical or logical blocks of executable code that may, for example, be organized as an object, procedure, or function. However, the executables of an identified module need not be physically located together; they may include disparate instructions stored in different locations that, when logically combined, comprise the module and achieve the module's intended purpose. In fact, a code module can be a single instruction or many instructions, and it can even be distributed across several different code segments, among different programs, and in various memory devices. Similarly, operational data can be identified and illustrated here within modules, and it can be incorporated in any suitable form and organized within any suitable type of data structure. Operational data can be collected as a single data set, or it can be distributed across different locations, even on different computer-readable storage devices. When a module or parts of a module are implemented in software, the software components are stored on one or more computer-readable storage devices. Any combination of one or more computer-readable media may be used. The computer-readable medium may be a computer-readable storage medium. The computer-readable medium may be a storage device that stores the code. The storage device may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, holographic, mechanical, or semiconductor system, apparatus, or device, or any suitable combination thereof. More specific examples (a non-exhaustive list) of storage devices would include the following: an electrical connection having one or more wires, a laptop floppy disk, a hard disk drive, random access memory (“RAM”), read-only memory (“ROM”), erasable programmable read-only memory (“EPROM” or Flash memory), portable compact disc read-only memory (“CD-ROM”), an optical storage device, a magnetic storage device, or any suitable combination thereof. In the context of this document, a computer-readable storage medium may be any tangible medium capable of containing or storing a program for use with, or in connection with, an instruction-executing system, apparatus, or device. The code to perform operations for modalities can be any number of lines long and can be written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Python, Ruby, Java, Smalltalk, C++, or similar, and conventional procedural programming languages ​​such as C or similar, and / or machine languages ​​such as assembly languages. The code can run entirely on the user's computer, partly on the user's computer as a standalone software package, partly on the user's computer and partly on a remote computer, or entirely on the remote computer or server.In the last scenario, the remote computer can connect to the user's computer through any type of network, including a local area network (“LAN”) or a wide area network (“WAN”), or the connection can be made to an external computer (for example, through the Internet using an Internet service provider). Reference throughout this descriptive report to a modality, the modality, or similar language means that a particular feature, structure, or function described in relation to the modality is included in at least one modality. Therefore, occurrences of the phrases "in a modality," "in the modality," and similar language throughout this descriptive report may, but do not necessarily, refer to the same modality, but mean "one or more, but not all, modalities" unless otherwise specified. The terms "includes," "comprises," "has," and variations thereof mean "includes, but is not limited to," unless otherwise specified. An enumerated list of items does not imply that any or all of the items are mutually exclusive unless otherwise specified. The terms "a," "an," and "the" also refer to one or more unless otherwise specified. Furthermore, the functions, structures, or characteristics of the modalities can be combined in any suitable way. The following description provides numerous specific details, such as programming examples, software modules, user selections, network transactions, database queries, database structures, hardware modules, hardware circuits, hardware chips, and so on, to provide a comprehensive understanding of the modalities. An expert in the relevant technique will recognize, however, that the modalities can be practiced without one or more of the specific details, or with other methods, components, materials, and so forth. In other cases, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of a modality. The aspects of the modalities are described below with reference to schematic flowcharts and / or schematic block diagrams of methods, apparatus, systems, and program products according to the modalities. It is understood that each block of the schematic flowcharts and / or schematic block diagrams, and the combinations of blocks in the schematic flowcharts and / or schematic block diagrams, can be implemented by code. The code can be provided to a processor of a general-purpose computer, special-purpose computer, or other programmable data-processing apparatus to produce a machine, such that the instructions, which are executed through the processor of the computer or other programmable data-processing apparatus, create a means of implementing the functions or acts specified in the schematic flowcharts and / or schematic or block diagrams. The code can also be stored on a storage device that can direct a computer, other programmable data processing apparatus, or other devices to function in a particular manner, so that the instructions stored on the storage device produce a manufactured item that includes instructions implementing the function / act specified in the schematic flowcharts and / or schematic block diagrams or block diagrams. The code can also be loaded into a computer, other programmable data processing device, or other devices to cause a series of operational steps to be performed on the computer, other programmable device, or other devices to produce a computer-implemented process such that the code that runs on the computer or other programmable device provides processes to implement the functions / acts specified in the flowchart and / or blocks or blocks of the block diagram. The schematic flowcharts and / or schematic block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of devices, systems, methods, and program products according to various modalities. In this respect, each block in the schematic flowcharts and / or schematic block diagrams can represent a module, segment, or portion of code, comprising one or more executable instructions to implement the specified logical functions. It should also be noted that, in some alternative implementations, the functions observed in the block may occur out of the order shown in the figures. For example, two blocks shown in succession may, in fact, execute substantially concurrently, or the blocks may sometimes execute in reverse order, depending on the functionality involved. Other steps and methods may be conceived that are equivalent in function, logic, or effect to one or more blocks, or parts thereof, in the illustrated figures. Although various types of arrows and line types can be used in flowcharts and / or block diagrams, it is understood that they do not limit the scope of the corresponding modes. In fact, some arrows or other connectors can be used to indicate only the logical flow of the represented mode. For example, an arrow might indicate a waiting or monitoring period of unspecified duration between the listed steps of the represented mode. It should also be noted that each block in block diagrams and / or flowcharts, and combinations of blocks in block diagrams and / or flowcharts, can be implemented using special-purpose hardware-based systems that perform the specified functions or actions, or combinations of special-purpose hardware and code. The description of elements in each figure may refer to elements in previous figures. Similar numbers refer to similar elements in all figures, including alternative forms of similar elements. Figure 1 represents one mode of a wireless communication system 100 for determining multiplexing patterns based on subcarrier spacing values. In one mode, the wireless communication system 100 includes remote units 102 and network units 104. Although Figure 1 depicts a specific number of remote units 102 and network units 104, a person skilled in the art will recognize that any number of remote units 102 and network units 104 can be included in the wireless communication system 100. In one configuration, remote 102 units may include computing devices such as desktop computers, laptops, personal digital assistants (PDAs), tablets, smartphones, smart TVs (e.g., internet-connected televisions), set-top boxes, game consoles, security systems (including security cameras), in-vehicle computers, network devices (e.g., routers, switches, modems), aircraft, drones, or similar devices. In some configurations, remote 102 units include wearable devices such as smartwatches, fitness trackers, head-mounted optical displays, or similar devices.On the other hand, remote units 102 may be referred to as subscriber units, mobile units, mobile stations, users, terminals, mobile terminals, fixed terminals, subscriber stations, UE, user terminals, a device, or by other terminology used in the art. Remote units 102 may communicate directly with one or more network units 104 via UL communication signals. In certain configurations, remote units 102 may communicate directly with other remote units 102 via sidelink communication. Network units 104 can be distributed across a geographical region. In certain modalities, it may also refer to a 104 network unit and / or may include one or more of an access point, an access terminal, a base, a base station, a NodeB, an evolved NodeB (“eNB”), a 5G NodeB (“gNB”), a home NodeB, a relay node, a device, a core network, an air server, a radio access node, an access point (“AP”), a new radio (NR), a network entity, an access and mobility management function (AMF), a unified data management (UDM), a unified data repository (UDR), a UDM / UDR, a policy control function (PCF), a radio access network (RAN), a network segment selection function (NSSF), a session management function (SMF), operations, administration and management (OAM), a user plane function (UPF), an application function, an authentication server function (AUSF),Security anchor functionality (SEAF), non-trusted 3GPP gateway function (TNGF), or by any other terminology used in the art. Network units 104 are generally part of a radio access network that includes one or more controllers communicatively coupled to one or more corresponding network units 104. The radio access network is generally communicatively coupled to one or more core networks, which may be coupled to other networks, such as the Internet and public switched telephone networks, among others. These and other elements of radio access and core networks are not illustrated, but are generally well known to those with normal experience in the subject. In one implementation, the Wireless 100 communication system complies with the NR protocols standardized in the Third Generation Partnership Project (3GPP), where the network unit 104 transmits using an OFDM modulation scheme on the downlink (DL) and the remote units 102 transmit on the uplink (UL) using either a single-carrier frequency-division multiple access (SCFDMA) or orthogonal frequency-division multiplexing (OFDM) scheme. However, more generally, the Wireless 100 communication system can implement other open or proprietary communication protocols, such as WiMAX or IEEE 802 variants.11, Global System for Mobile Communications (GSM), General Packet Radio Service (“GPRS”), Universal Mobile Telecommunications System (“UMTS”), Long-Term Evolution variants (“LTE’j”, Code Division Multiple Access 2000 (“CDMA2000”), Bluetooth®, ZigBee, Sigfoxx, among other protocols. This description is not intended to be limited to the implementation of any particular wireless communication system architecture or protocol. Network units 104 can serve multiple remote units 102 within a service area, such as a cell (or cell sector), via a wireless communication link. Network units 104 transmit DL communication signals to serve network units 102 in the time, frequency, and / or space domains. In several modes, a remote unit 102 can receive an indication of a first subcarrier separation value. In some modes, the remote unit 102 can receive a configuration for a demodulation reference signal. In certain modes, the remote unit 102 can determine a multiplexing pattern for the demodulation reference signal and / or a number of demodulation reference signal ports by comparing the first subcarrier separation value with a second subcarrier separation value. Consequently, the remote unit 102 can be used to determine the multiplexing pattern based on subcarrier separation values. In certain modes, a remote unit 102 can receive an indication of a first subcarrier separation value. In some modes, the remote unit 102 can receive a configuration for a demodulation reference signal. In certain modes, the remote unit 102 can determine a frequency-domain multiplexing pattern for phase-tracking reference signals by comparing the first subcarrier separation value with a second subcarrier separation value. Consequently, the remote unit 102 can be used to determine the multiplexing pattern based on subcarrier separation values. Figure 2 represents one configuration of an apparatus 200 that can be used for determining multiplexing patterns based on subcarrier spacing values. The apparatus 200 includes one configuration of the remote unit 102. The remote unit 102 may also include a processor 202, a memory 204, an input device 206, a display 208, a transmitter 210, and a receiver 212. In some configurations, the input device 206 and the display 208 are combined into a single device, such as a touchscreen. In certain configurations, the remote unit 102 may not include an input device 206 and / or a display 208. In various configurations, the remote unit 102 may include one or more of the processors 202, the memory 204, the transmitter 210, and the receiver 212, and may not include the input device 206 and / or the display 208. In one configuration, the processor 202 can include any known controller capable of executing computer-readable instructions and / or performing logical operations. For example, the processor 202 can be a microcontroller, a microprocessor, a central processing unit (CPU), a graphics processing unit (GPU), an auxiliary processing unit, a field-programmable gate array (FPGA), or a similar programmable controller. In some configurations, the processor 202 executes instructions stored in memory 204 to perform the methods and routines described in this document. The processor 202 is communicatively coupled to memory 504, input device 206, display 208, transmitter 210, and receiver 212. Memory 204, in one configuration, is a computer-readable storage medium. In some configurations, memory 204 includes volatile computer storage media. For example, memory 204 may include RAM, which includes dynamic RAM (“DRAM”), synchronous dynamic RAM (“SDRAM”), and / or static RAM (“SRAM”). In some configurations, memory 204 includes a non-volatile computer-readable medium. For example, memory 204 may include a hard disk drive, flash memory, or any other suitable non-volatile computer storage device. In some configurations, memory 204 includes both volatile and non-volatile computer-readable media. In some configurations, memory 204 also stores program code and related data, such as an operating system or other control algorithms that operate on remote drive 102. Input device 206, in one configuration, may include any known computer input device, including a touchpad, button, keyboard, stylus, microphone, or similar device. In some configurations, input device 206 may be integrated with display 208, for example, as a touchscreen or similar touch-sensitive display. In some configurations, input device 206 includes a touchscreen, so that text can be entered using a virtual keyboard displayed on the touchscreen and / or manually on the touchscreen. In some configurations, input device 206 includes two or more different devices, such as a keyboard and a touchpad. Display 208, in one embodiment, may include any known electronically controllable display or screen device. Display 208 may be designed to emit visual, audio, and / or haptic signals. In some embodiments, Display 208 includes an electronic display capable of sending visual data to a user. For example, Display 208 may include, among others, a liquid crystal display (LCD), a light-emitting diode (LED) display, an organic light-emitting diode (OLED) display, a projector, or a similar display device capable of showing images, text, or the like to a user. As another, non-limiting example, Display 208 may include a wearable display such as a smartwatch, smart glasses, a head-up display, or the like.In addition, the 208 display can be a component of a smartphone, a personal digital assistant, a television, a desktop computer, a laptop (notebook), a personal computer, a vehicle dashboard, or similar. In certain configurations, the 208 display includes one or more speakers to produce sound. For example, the 208 display can produce an audible alert or notification (e.g., a beep or a ring). In some configurations, the 208 display includes one or more haptic devices to produce vibrations, movement, or other haptic feedback. In some configurations, all or parts of the 208 display can be integrated with the 206 input device. For example, the 206 input device and the 208 display can form a touchscreen or a similar touch-sensitive display. In other configurations, the 208 display can be located near the 206 input device. In some modes, receiver 212 receives an indication of a first subcarrier separation value and a configuration for a demodulation reference signal. In various modes, processor 202 determines a multiplexing pattern for the demodulation reference signal and / or a number of demodulation reference signal ports by comparing the first subcarrier separation value with a second subcarrier separation value. In certain modes, receiver 212 receives an indication of a first subcarrier separation value and a configuration for a demodulation reference signal. In various modes, processor 202 determines a frequency-domain multiplexing pattern for phase-tracking reference signals by comparing the first subcarrier separation value with a second subcarrier separation value. Although only one 210 transmitter and one 212 receiver are illustrated, the 102 remote unit can have any suitable number of 210 transmitters and 212 receivers. The 210 transmitter and 212 receiver can be any suitable type of transmitter and receiver. In one configuration, the 210 transmitter and 212 receiver can be part of a transceiver. Figure 3 represents one modality of a device 300 that can be used for determining multiplexing patterns based on subcarrier spacing values. The device 300 includes one modality of network unit 104. In addition, network unit 104 may include a processor 302, a memory 304, an input device 306, a display 308, a transmitter 310, and a receiver 312. As can be seen, the processor 302, memory 304, input device 306, display 308, transmitter 310, and receiver 312 may be substantially similar to the processor 202, memory 204, input device 206, display 208, transmitter 210, and receiver 212 of remote unit 102, respectively. In certain modes, there may be an impact on the configuration, activation, and / or indication of demodulation reference signals (DM-RS) (DMRS'j) and / or phase-tracking reference signals (PT-RS) (“PTRS”) due to increased subcarrier spacing (“SCS”). In such modes, specific configurations may be used based on SCS requirements and the corresponding bandwidths for DMRS and / or PTRS. In some modes, a reduced-capacity reference signal design can be configured and / or used (e.g., in terms of multiple ports, overhead for channel estimation, phase noise tracing, and / or Doppler estimation). In such modes, a subcarrier separation value may be above a predetermined threshold. In several modes, the number of ports and / or overhead for reference signals may be a function of one or more parameters (e.g., SCS value). In certain modes, a reference signal design may use a common signal for both DM-RS and PT-RS. In some modes, a different signal design may be used for DM-RS and PT-RS. In such modes, a one-to-one association may exist (e.g., multiple ports for DM-RS and PT-RS may be the same).In some modes, an overload of a reference signal may be involved depending on a parameter or a combination of parameters (e.g., carrier frequency, SCS, BWP size, modulation and coding scheme (MCS), and waveform type). In several configurations found here, the benefits can include the exploitation of highly directional beams at higher frequencies with a high SCS by configuring, indicating, and / or activating multiple ports for a reference signal as an explicit and / or implicit function of at least the SCS. In such configurations, for high-frequency transmission, a high-range performance gain can be achieved. In one mode, a network can configure and / or transmit a table to a user device (UD) to determine a set of parameters for transmitting and / or receiving reference signals for DL ​​and / or UL. In this mode, a reference signal is used for DM-RS and / or PT-RS (for example, for channel estimation, phase noise tracking, and / or other purposes such as channel measurement). Individual sets of values ​​can be configured for different SCS values. Figure 4 is a 400 diagram illustrating one way to show reference signals as a function of SCS. The 400 diagram is just one example for determining different patterns. The exact values ​​and / or parameters are not limited to the 400 diagram. For example, Figure 5 is a 500 diagram illustrating another way to show reference signals as a function of SCS. In an implementation of the first mode, a time overload and / or a pattern can be configured separately as a function of MCS, but with increased SCS values. In another implementation of the first mode, the different parameters of the reference signal and their values ​​may not be a function of the SCS direction, but may be a function of one or more additional parameters, such as the carrier frequency, SCS, bandwidth portion size (BWP), MCS, and / or waveform type. Figures 6, 7, and 8 illustrate examples of such implementations. Specifically, Figure 6 is a diagram illustrating one mode of a function determining the value of F, Figure 7 is a diagram illustrating one mode of reference signals as a function of F, and Figure 8 is a diagram illustrating another mode of reference signals as a function of F. In some modes, the DM-RS and PT-RS configurations are determined separately based on a direct function of SCS or as a function of a combination of several parameters (e.g., the F function). In such modes, a DM-RS or PT-RS configuration can be determined, and if either of these reference signals is not determined based on SCS or F, then another procedure can be used to determine its configuration. In certain modes, DM-RS parameters can be determined as a subset of existing DM-RS configuration types. For example, the maximum number of ports for DM-RS Type 1 might be limited to a lower value, such as 2 for 1-symbol length DMRS and 4 for 2-symbol length DMRS if the SCS value is high, such as 480 kHz or 960 kHz. In such an example, other factors for DM-RS transmission and / or reception might be implicitly determined using existing configurations. For instance, if the maximum number of ports for the DM-RS Type 1 configuration is greater than 2 and up to 4, only 2-symbol length DM-RS can be used (e.g., single-symbol length DM-RS cannot be used). In another example, a maximum number of ports for DM-RS type 2 may be limited to a lower value, such as 3 for DMRS of 1 symbol length and 6 for DMRS of 2 symbol length if an SCS value is high, such as 480 kHz or 960 kHz.In such an example, other factors for DM-RS transmission and / or reception can be implicitly determined using existing configurations. For example, if the maximum number of ports for the DM-RS type 1 configuration is more than 3 and up to 6, only 2-symbol DM-RS can be used (e.g., single-symbol DM-RS cannot be used). In several modes, a DM-RS port indication field in the downlink control information (DCI) can be dynamically or semi-statically disabled. If the field is disabled, a UE can assume that multiple ports will be used for transmit and / or receive, which may be equal to the maximum number of allowed ports. In such modes, the UE uses all configured ports, and therefore an explicit port indication table is not required. For a high SCS, it can be assumed that low-range transmission is used, the maximum number of ports is low, and all ports can be used for transmit and / or receive. In some modes, if a DM-RS port indication field is enabled in DCI, then a subset of existing tables can be used, or another implicit determination can be used for port indication. In certain modalities, depending on several parameters, a type of quasi-colocation (QCL) can be configured using high layers that indicate a spatial relationship between the DM-RS and / or PT-RS resources (for example, DM-RS is QCLed with PT-RS) Figure 9 is a block diagram illustrating another embodiment of a 900 method for determining multiplexing patterns based on subcarrier spacing values. In some embodiments, the 900 method is performed by a device, such as the remote unit 102 and / or the network unit 104. In certain embodiments, the 900 method can be performed by a processor executing program code, for example, a microcontroller, a microprocessor, a CPU, a GPU, an auxiliary processing unit, an FPGA, or similar. In several modes, method 902 includes receiving an indication of a separation value for the first subcarrier. In some modes, method 900 includes receiving 904 a configuration for a demodulation reference signal. In certain modes, method 900 includes determining 906 a multiplexing pattern for the demodulation reference signal and / or a number of demodulation reference signal ports for the demodulation reference signal by comparing the separation value of the first subcarrier with a separation value of the second subcarrier. In certain modes, the separation value of the second subcarrier is fixed, semi-statically configured, and / or dynamically indicated. In some modes, the number of demodulation reference signal ports decreases when the separation value of the first subcarrier is greater than or equal to the separation value of the second subcarrier. In various modes, the multiplexing pattern for the demodulation reference signal comprises a type of frequency-domain multiplexing and / or a type of time-domain multiplexing. In one mode, the frequency-domain multiplexing type comprises only frequency-domain multiplexing combs in response to the separation value of the first subcarrier being greater than or equal to the separation value of the second subcarrier. In certain modes, the frequency-domain multiplexing type excludes multiplexing based on the frequency-domain orthogonal coverage code. In some modes, the separation value of the second subcarrier comprises 480 kHz and / or 960 kHz. In several modes, the demodulation reference signal pattern comprises parameters determined as a subset of a demodulation reference signal type. In one mode, the demodulation reference signal type comprises either Type 1 or Type 2. In certain modes, the number of demodulation reference signal ports depends on the demodulation reference signal type and is based on an antenna port field indicated in the downlink control information. In some modes, the multiplexing pattern depends on the type of demodulation reference signal and is based on an antenna port field specified in the downlink control information. In several modes, the maximum number of demodulation reference signal ports is equal to a maximum allowed number of demodulation reference signal ports because the separation value of the first subcarrier is greater than or equal to the separation value of the second subcarrier. In one mode, multiplexing based on orthogonal cover code in the frequency domain is not specified because the separation value of the first subcarrier is greater than or equal to the separation value of the second subcarrier. Figure 10 is a block diagram illustrating another embodiment of a method 1000 for determining multiplexing patterns based on subcarrier spacing values. In some embodiments, the method 1000 is performed by a device, such as a remote unit 102. In certain embodiments, the method 1000 can be performed by a processor executing program code, for example, a microcontroller, a microprocessor, a CPU, a GPU, an auxiliary processing unit, an FPGA, or similar. In several modes, method 1000 includes receiving an indication of a separation value for the first subcarrier. In some modes, method 1000 includes receiving a configuration for a demodulation reference signal. In certain modes, method 1000 includes determining a frequency-domain multiplexing pattern for phase-tracking reference signals by comparing the separation value of the first subcarrier with a separation value of the second subcarrier. In certain modes, the frequency-domain multiplexing pattern for the phase-tracking reference signal involves decreasing the spacing between the phase-tracking reference signal subcarriers when the spacing value of the first subcarrier is greater than or equal to the spacing value of the second subcarrier. In some modes, there is no spacing between the phase-tracking reference signal subcarriers. In several modes, the spacing value of the second subcarrier is either 480 kHz and / or 960 kHz. In one embodiment, a method comprises: receiving an indication of a separation value of the first subcarrier; receiving a configuration for a demodulation reference signal; and determining a multiplexing pattern for the demodulation reference signal and / or a number of demodulation reference signal ports for the demodulation reference signal by comparing the separation value of the first subcarrier with a separation value of the second subcarrier. In certain modes, the separation value of the second subcarrier is fixed, semi-statically configured and / or dynamically indicated. In some modes, the number of demodulation reference signal ports decreases in response to the separation value of the first subcarrier being greater than or equal to the separation value of the second subcarrier. In various modalities, the multiplexing pattern for the demodulation reference signal comprises a type of multiplexing in the frequency domain and / or a type of multiplexing in the time domain. In one mode, the frequency domain multiplexing type comprises only frequency domain multiplexing combs in response to the separation value of the first subcarrier being greater than or equal to the separation value of the second subcarrier. In certain modalities, the type of multiplexing in the frequency domain excludes multiplexing based on the orthogonal coverage code in the frequency domain. In some modes, the separation value of the second subcarrier comprises 480 kHz and / or 960 kHz. In several modalities, the demodulation reference signal pattern comprises parameters determined as a subset of a type of demodulation reference signal. In one mode, the type of demodulation reference signal comprises either type 1 or type 2. In certain modes, the number of demodulation reference signal ports depends on the type of demodulation reference signal and is based on an antenna port field indicated in the downlink control information. In some modes, the multiplexing pattern depends on the type of demodulation reference signal and is based on an antenna port field indicated in the downlink control information. In various modes, the maximum number of demodulation reference signal ports is equal to a maximum allowed number of demodulation reference signal ports in response to the separation value of the first subcarrier being greater than or equal to the separation value of the second subcarrier. In one mode, orthogonal cover code-based multiplexing in the frequency domain is not indicated in response to the separation value of the first subcarrier being greater than or equal to the separation value of the second subcarrier. In one embodiment, an apparatus comprises: a receiver that: receives an indication of a separation value of a first subcarrier; and a processor that determines a multiplexing pattern for the demodulation reference signal and / or a number of demodulation reference signal ports for the demodulation reference signal by comparing the separation value of the first subcarrier with a separation value of the second subcarrier. In certain modes, the separation value of the second subcarrier is fixed, semi-statically configured and / or dynamically indicated. In some modes, the number of demodulation reference signal ports decreases in response to the separation value of the first subcarrier being greater than or equal to the separation value of the second subcarrier. In various modalities, the multiplexing pattern for the demodulation reference signal comprises a type of multiplexing in the frequency domain and / or a type of multiplexing in the time domain. In one mode, the frequency domain multiplexing type comprises only frequency domain multiplexing combs in response to the separation value of the first subcarrier being greater than or equal to the separation value of the second subcarrier. In certain modalities, the type of multiplexing in the frequency domain excludes multiplexing based on the orthogonal coverage code in the frequency domain. In some modes, the separation value of the second subcarrier comprises 480 kHz and / or 960 kHz. In several modalities, the demodulation reference signal pattern comprises parameters determined as a subset of a type of demodulation reference signal. In one mode, the type of demodulation reference signal comprises either type 1 or type 2. In certain modes, the number of demodulation reference signal ports depends on the type of demodulation reference signal and is based on an antenna port field indicated in the downlink control information. In some modes, the multiplexing pattern depends on the type of demodulation reference signal and is based on an antenna port field indicated in the downlink control information. In various modes, the maximum number of demodulation reference signal ports is equal to a maximum allowed number of demodulation reference signal ports in response to the separation value of the first subcarrier being greater than or equal to the separation value of the second subcarrier. In one mode, orthogonal cover code-based multiplexing in the frequency domain is not indicated in response to the separation value of the first subcarrier being greater than or equal to the separation value of the second subcarrier. In one embodiment, a method comprises: receiving an indication of a separation value of the first subcarrier; receiving a configuration for a demodulation reference signal; and determining a multiplexing pattern in the frequency domain for phase-tracking reference signals by comparing the separation value of the first subcarrier with a separation value of the second subcarrier. In certain modes, the frequency domain multiplexing pattern for the phase-tracking reference signal comprises decreasing a space between the subcarriers of the phase-tracking reference signal in response to the separation value of the first subcarrier being greater than or equal to the separation value of the second subcarrier. In some modes, there is no space between the subcarriers of the phase-tracking reference signal. In several modes, the separation value of the second subcarrier comprises 480 kHz and / or 960 kHz. In one embodiment, an apparatus comprises: a receiver that: receives an indication of a separation value of the first subcarrier; and receives a configuration for a demodulation reference signal; and a processor that determines a multiplexing pattern in the frequency domain for phase-tracking reference signals by comparing the separation value of the first subcarrier with a separation value of the second subcarrier. In certain modes, the frequency domain multiplexing pattern for the phase-tracking reference signal comprises decreasing a space between the subcarriers of the phase-tracking reference signal in response to the separation value of the first subcarrier being greater than or equal to the separation value of the second subcarrier. In some modes, there is no space between the subcarriers of the phase-tracking reference signal. In several modes, the separation value of the second subcarrier comprises 480 kHz and / or 960 kHz. The methods may be practiced in other specific ways. The methods described should be considered in all respects as illustrative only and not restrictive. The scope of the invention is therefore indicated by the appended claims rather than by the foregoing description. All modifications that fall within the meaning and range of equivalence of the claims shall be included within their scope.

Claims

1. A method characterized in that it comprises: receiving an indication of a separation value of the first subcarrier; receiving a configuration for a demodulation reference signal; and determining a multiplexing pattern for the demodulation reference signal, a number of demodulation reference signal ports for the demodulation reference signal, or a combination thereof by comparing the separation value of the first subcarrier with a separation value of the second subcarrier.

2. The method according to claim 1, characterized in that the separation value of the second subcarrier is fixed, configured semi-statically, indicated dynamically, or some combination thereof.

3. The method according to claim 1, characterized in that the number of demodulation reference signal ports decreases in response to the separation value of the first subcarrier being greater than or equal to the separation value of the second subcarrier.

4. The method according to claim 1, characterized in that the multiplexing pattern for the demodulation reference signal comprises a frequency-domain multiplexing type, a time-domain multiplexing type, or a combination thereof.

5. The method according to claim 4, characterized in that the frequency domain multiplexing type comprises only frequency domain multiplexing combs in response to the separation value of the first subcarrier being greater than or equal to the separation value of the second subcarrier.

6. The method according to claim 5, characterized in that the type of multiplexing in the frequency domain excludes multiplexing based on the orthogonal coverage code in the frequency domain.

7. The method according to claim 1, characterized in that the demodulation reference signal pattern comprises parameters determined as a subset of a type of demodulation reference signal.

8. The method according to claim 7, characterized in that the number of demodulation reference signal ports depends on the type of demodulation reference signal and is based on an antenna port field indicated in the downlink control information.

9. The method according to claim 7, characterized in that the multiplexing pattern depends on the type of demodulation reference signal and is based on an antenna port field indicated in the downlink control information.

10. The method according to claim 1, characterized in that a maximum number of demodulation reference signal ports is equal to a maximum allowed number of demodulation reference signal ports in response to the separation value of the first subcarrier being greater than or equal to the separation value of the second subcarrier.

11. The method according to claim 1, characterized in that the frequency domain orthogonal cover code-based multiplexing is not indicated in response to the separation value of the first subcarrier being greater than or equal to the separation value of the second subcarrier.

12. An apparatus characterized in that it comprises: a receiver that: receives an indication of a separation value of the first subcarrier; and receives a configuration for a demodulation reference signal; and a processor that determines a multiplexing pattern for the demodulation reference signal, a number of demodulation reference signal ports for the demodulation reference signal, or a combination thereof by comparing the separation value of the first subcarrier with a separation value of the second subcarrier.

13. The apparatus according to claim 12, characterized in that the separation value of the second subcarrier is fixed, configured semi-statically, indicated dynamically, or some combination thereof.

14. The apparatus according to claim 12, characterized in that the number of demodulation reference signal ports decreases in response to the separation value of the first subcarrier being greater than or equal to the separation value of the second subcarrier.

15. The apparatus according to claim 12, characterized in that the multiplexing pattern for the demodulation reference signal comprises a frequency-domain multiplexing type, a time-domain multiplexing type, or a combination thereof.

16. The apparatus according to claim 15, characterized in that the type of multiplexing in the frequency domain excludes multiplexing based on the orthogonal coverage code in the frequency domain.

17. The apparatus according to claim 12, characterized in that the demodulation reference signal pattern comprises parameters determined as a subset of a type of demodulation reference signal.

18. A method characterized in that it comprises: receiving an indication of a separation value of the first subcarrier; receiving a configuration for a demodulation reference signal; and determining a multiplexing pattern in the frequency domain for phase-tracking reference signals by comparing the separation value of the first subcarrier with a separation value of the second subcarrier.

19. The method according to claim 18, characterized in that the frequency domain multiplexing pattern for the phase-tracking reference signal comprises decreasing a space between the subcarriers of the phase-tracking reference signal in response to the separation value of the first subcarrier being greater than or equal to the separation value of the second subcarrier.

20. The method according to claim 18, characterized in that there is no space between the subcarriers of the phase-tracking reference signal.

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