Power adjustment for aligning transmit chain power ratios

Abstract

Various aspects of the present disclosure generally relate to wireless communication. A wireless communication device can have an apparatus to align nonlinearities between transmit chains of the wireless communication device driven by a same digital port. The apparatus can adjust an amplification power output or an amplification saturation power to adjust a ratio between the amplification saturation power and the amplification power output of one or more transmit chains of the wireless communication device. The apparatus can adjust the ratios of transmit chains to align the ratios of the transmit chains for more consistently managing nonlinearities of the chain components. Numerous other aspects are described.

Description

[0001] Cross Reference to Related Applications

[0002] This patent application claims priority to U.S. Patent Application No. 17 / 661,460, filed April 29, 2022, entitled “POWER ADJUSTMENT TO ALIGN TRANSMIT CHAIN POWER RATIOS,” and assigned to the assignee hereof. The disclosure of the priority application is considered part of and is incorporated by reference into this patent application. TECHNICAL FIELD

[0003] Aspects of the present disclosure relate generally to wireless communication and to techniques and apparatuses for adjusting power to align transmit chain power ratios. BACKGROUND

[0004] Wireless communications systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts. Typical wireless communication systems can employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and long term evolution (LTE). LTE / LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3 GPP).

[0005] A wireless network can include one or more base stations that support communication for a user equipment (UE) or multiple UEs. A UE can communicate with a base station via downlink communications and uplink communications. “Downlink” (or “DL”) refers to

[0006] The above multiple access technologies have been adopted in various telecommunication standards to provide common protocols to communicate over the air interfaces. New Radio (NR), which can be referred to as 5G, is a set of enhancements to the LTE mobile standard promulgated by 3GPP. NR is designed to better support mobile broadband Internet access by improving spectral efficiency, lowering costs, improving services, making use of new spectrum, and better integrating with other open standards using OFDM with a cyclic prefix (CP) (CP-OFDM) on the downlink (DL), using CP- OFDM and / or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-s- OFDM) on the uplink (UL), as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation. However, as the demand for mobile broadband access continues to increase, there exists a need for further improvements in LTE, NR, and other radio access technologies. Further improvements in LTE, NR, and other radio access technologies can be desirable. SUMMARY

[0007] Some aspects described herein relate to a method of wireless communication performed by an apparatus of a wireless communication device. The method can include obtaining a signal from a digital port prior to amplification and transmission by at least a first transmit chain for a first antenna element of the wireless communication device and a second transmit chain for a second antenna element of the wireless communication device. The method can include adjusting an amplification saturation power of the signal of the first transmit chain such that a first ratio of the amplification saturation power to an amplification output power of the first transmit chain and a second ratio of an amplification saturation power to an amplification output power of the second transmit chain are aligned. The method can include transmitting the signal in association with a wireless communication.

[0008] Some aspects described herein relate to a method of wireless communication performed by an apparatus of a wireless communication device. The method can include obtaining a signal from a digital port prior to amplification and transmission by at least a first transmit chain for a first antenna element of the wireless communication device and a second transmit chain for a second antenna element of the wireless communication device. The method can include adjusting an amplification saturation power of the signal of the first transmit chain such that a first ratio of the amplification saturation power to an amplification output power of the first transmit chain and a second ratio of an amplification saturation power to an amplification output power of the second transmit chain are aligned. The method can include transmitting the signal in association with a wireless communication.

[0009] Some aspects described herein relate to an apparatus of a wireless communication device. The apparatus can include a memory and one or more processors coupled to the memory. The one or more processors can be configured to obtain a signal from a digital port prior to amplification and transmission on at least a first transmit chain for a first antenna element of the wireless communication device and a second transmit chain for a second antenna element of the wireless communication device. The one or more processors can be configured to adjust an amplification saturation power of the signal of the first transmit chain such that a first ratio of the amplification saturation power to an amplification output power of the first transmit chain and a second ratio of an amplification saturation power to an amplification output power of the second transmit chain are aligned. The one or more processors can be configured to transmit the signal in association with a wireless communication.

[0010] Some aspects described herein relate to an apparatus of a wireless communication device. The apparatus can include a memory and one or more processors coupled to the memory. The one or more processors can be configured to obtain a signal from a digital port prior to amplification and transmission on at least a first transmit chain for a first antenna element of the wireless communication device and a second transmit chain for a second antenna element of the wireless communication device. The one or more processors can be configured to adjust an amplification output power of the signal of the first transmit chain such that a first ratio of an amplification saturation power to the amplification output power of the first transmit chain and a second ratio of an amplification saturation power to the amplification output power of the second transmit chain are aligned. The one or more processors can be configured to transmit the signal in association with a wireless communication.

[0011] Some aspects described herein relate to a non-transitory computer-readable medium storing a set of instructions for wireless communication by a wireless communication device. The set of instructions, when executed by one or more processors of the wireless communication device, can cause the wireless communication device to obtain a signal from a digital port prior to amplification and transmission on at least a first transmit chain for a first antenna element of the wireless communication device and a second transmit chain for a second antenna element of the wireless communication device. The set of instructions, when executed by the one or more processors of the wireless communication device, can cause the wireless communication device to adjust an amplification saturation power of the signal of the first transmit chain such that a first ratio of the amplification saturation power to an amplification output power of the first transmit chain and a second ratio of an amplification saturation power to an amplification output power of the second transmit chain are aligned. The set of instructions, when executed by the one or more processors of the wireless communication device, can cause the wireless communication device to transmit the signal in association with a wireless communication.

[0012] Some aspects described herein relate to a non-transitory computer- readable medium storing a set of instructions for wireless communication by a wireless communication device. The set of instructions, when executed by one or more processors of the wireless communication device, can cause the wireless communication device to obtain a signal from a digital port prior to amplification and transmission on at least a first transmit chain for a first antenna element of the wireless communication device and a second transmit chain for a second antenna element of the wireless communication device. The set of instructions, when executed by the one or more processors of the wireless communication device, can cause the wireless communication device to adjust an amplification output power of the signal of the first transmit chain such that a first ratio of an amplification saturation power to the amplification output power of the first transmit chain and a second ratio of an amplification saturation power to the amplification output power of the second transmit chain are aligned. The set of instructions, when executed by the one or more processors of the wireless communication device, can cause the wireless communication device to transmit the signal in association with a wireless communication.

[0013] Some aspects described herein relate to an apparatus of a wireless communication device. The apparatus can include means for obtaining a signal from a digital port prior to amplification and transmission on at least a first transmit chain for a first antenna element of the wireless communication device and a second transmit chain for a second antenna element of the wireless communication device. The apparatus can include means for adjusting an amplification saturation power of the signal of the first transmit chain such that a first ratio of an amplification saturation power to an amplification output power of the first transmit chain and a second ratio of an amplification saturation power to the amplification output power of the second transmit chain are aligned. The apparatus can include means for transmitting the signal in association with a wireless communication.

[0014] Some aspects described herein relate to an apparatus of a wireless communication device. The apparatus can include means for obtaining a signal from a digital port prior to amplification and transmission on at least a first transmit chain for a first antenna element of the wireless communication device and a second transmit chain for a second antenna element of the wireless communication device. The apparatus can include means for adjusting an amplification output power of the signal of the first transmit chain such that a first ratio of an amplification saturation power to an amplification output power of the first transmit chain and a second ratio of an amplification saturation power to the amplification output power of the second transmit chain are aligned. The apparatus can include means for transmitting the signal in association with a wireless communication.

[0015] Aspects generally include a method, apparatus, system, computer program product, non-transitory computer-readable medium, user equipment, base station, network entity, wireless communication device, and / or processing system as substantially described herein with reference to and as illustrated by the drawings and specification.

[0016] The foregoing has outlined rather broadly the features and technical advantages of examples according to the disclosure in order that the detailed description that follows can be better understood. Additional features and advantages will be described below. The disclosed concepts and specific examples can be readily utilized as bases upon which one skilled in the art can otherwise design or perpendicular other structures for carrying out the same purposes of the disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The characteristics of the concepts disclosed herein, both their organization and their method of operation, together with associated advantages, will be better understood from the following description when considered in connection with the accompanying figures. Each of the figures is provided for the purpose of illustration and description, and not as a definition of the limits of the claims.

[0017] While aspects are described in the disclosure by illustration to some examples, those skilled in the art will understand that such aspects can be implemented in many different arrangements and scenarios. Techniques described herein can be implemented using different platform types, devices, systems, shapes, sizes, and / or packaging arrangements. For example, some aspects can be implemented via integrated chip implementations or other non-module-component based devices (e.g., end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail / purchasing devices, medical devices, and / or artificial intelligence devices). Aspects can be implemented in chip-level components, modular components, non-modular components, non-chip-level components, device-level components, and / or system-level components. Devices incorporating described aspects and features can include additional components and features for implementation and practice of claimed and described aspects. For example, transmission and reception of wireless signals can include one or more components for analog and digital purposes (e.g., hardware components including antennas, radio frequency (RF) chains, power amplifiers, modulators, buffers, processors, interleavers, adders, and / or summers). It is intended that aspects described herein can be practiced in a wide variety of devices, components, systems, distributed arrangements, and / or end-user devices of varying size, shape, and constitution. BRIEF DESCRIPTION OF DRAWINGS

[0018] So that the above-recited features of the present disclosure can be understood in detail, a more particular description will be rendered by reference to aspects, some of which are illustrated in the appended drawings. It is intended that the appended drawings be considered prime illustrative material of the disclosure, and in no way limiting of its scope. Like reference numerals can be used to refer to like elements throughout the several views.

[0019] Figure 1 is a diagram illustrating an example of a wireless network, in accordance with the present disclosure.

[0020] Figure 2 is a diagram illustrating an example of a network entity in communication with a user equipment (UE) in a wireless network, in accordance with the present disclosure.

[0021] Figure 3 is a diagram illustrating an example of a disaggregated base station according to the present disclosure.

[0022] Figure 4 is a diagram illustrating an example of a transmit (Tx) chain and a receive (Rx) chain of a UE according to the present disclosure.

[0023] Figure 5 is a diagram illustrating an example of alignment nonlinearity of multiple transmit chains according to the present disclosure.

[0024] Figure 6 is a flow diagram of an example method of wireless communication according to the present disclosure.

[0025] Figure 7 is a flow diagram of an example method of wireless communication according to the present disclosure.

[0026] Figure 8 is a diagram of an example apparatus for wireless communication according to the present disclosure.

[0027] Figure 9 is a diagram illustrating an example of a hardware implementation for an apparatus employing a processing system according to the present disclosure. DETAILED DESCRIPTION

[0028] A transmitter of a wireless communication device can include a nonlinear component that distorts a transmitted signal at higher powers. The transmitter can include transmit chains each having a front end. The front end can include a power amplifier (PA) and other components to control the amplified output power (P out ) of a signal from a digital port up to a maximum output power of the PA. The maximum output power of the PA can be referred to as the “amplification saturation power” or P sat . Each transmit chain can be associated with a ratio of P sat to P out .

[0029] Fifth generation (5G) products can use a hybrid analog and digital beamforming architecture in which a single digital port drives multiple analog chains. Pre-distortion can be applied to an array of PA elements to address distortion, and it is assumed that all chains in the chain experience the same non-linear (NL) characteristics. However, this assumption does not hold true accurately because each digital port can be connected to, for example, 128 antenna elements divided into 16 boosters. A booster can be a radio frequency chip connected to an intermediate frequency and baseband chip. While chains belonging to the same booster have similar NL characteristics, different boosters can have different NL characteristics due to process variations, physical layout, and / or other reasons. The NL variations can cause the ratio of PA power at different chains to have different NL characteristics, and thus pre-distortion can not be optimal and cause error vector magnitude (EVM) and / or adjacent channel leakage ratio (ACLR) degradation.

[0030] According to various aspects described herein, a wireless communication device (e.g., UE, base station) can have a means (e.g., controller) to align non-linearities between chains driven by the same digital port. The controller can adjust the power of one or more transmit chains out or the power of sat to adjust the ratio between the power of out and the power of sat in order to align the ratio of the multiple transmit chains. By adjusting the power to align the ratio of the multiple transmit chains, the NL characteristics can be managed more consistently across the transmit chains, improving the performance of the transmitter.

[0031] Various aspects of the disclosure are described more fully below with reference to the accompanying drawings. This disclosure may, however, be embodied in many different forms and should not be construed as limited to any specific structure or function presented throughout this disclosure. Rather, these aspects are provided as illustrative examples so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. As such, various aspects of the disclosure can take many different forms and should not be construed as limited to the particular forms set forth throughout this disclosure. Rather, these aspects are provided as illustrative examples so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. One skilled in the art will appreciate that the scope of the disclosure is intended to cover all aspects of the disclosure disclosed herein, whether implemented independently of, or combined with, any other aspect of the disclosure. For example, any or all of the aspects described herein can be repeated, combined, and / or varied, and the order of the steps can be rearranged. Further, this disclosure is intended to cover any result or apparatus that is developed using, or otherwise derives its essential characteristics from, the aspects of the disclosure disclosed herein. It is to be understood that any aspect of the disclosure disclosed herein can be implemented by one or more elements of the disclosure.

[0032] Several aspects of telecommunication systems will now be presented with reference to various apparatus and methods. These apparatus and methods will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as "elements"). These elements can be implemented using hardware, software, or combinations thereof. Whether such elements are implemented as hardware or software depends on the particular application and design constraints imposed on the overall system.

[0033] While aspects can be described herein using terminology commonly associated with a 5G or new radio (NR) radio access technology (RAT), aspects of the present disclosure can be applied to other RATs, such as a 3G RAT, a 4G RAT, and / or a 5G-and-beyond RAT (e.g., 6G).

[0034] Figure 1 FIG. 1 is a diagram illustrating an example of a wireless network 100, in accordance with the present disclosure. The wireless network 100 can be or can include elements of a 5G (e.g., NR) network and / or a 4G (e.g., Long Term Evolution (LTE)) network, among other examples. The wireless network 100 can include a user equipment (UE) 120a or multiple UEs 120 (shown as UE 120a, UE 120b, UE 120c, UE 120d, and UE 120e). The wireless network 100 can also include one or more network entities, such as base stations 110 (shown as BS 110a, BS 110b, BS 110c, and BS 1 lOd) and / or other network entities. A base station 110 is an entity that communicates with UEs 120. A base station 110 (sometimes referred to as a BS) can include, for example, an NR base station, an LTE base station, a Node B, an eNB (e.g., in 4G), a gNB (e.g., in 5G), an access point, and / or a transmit receive point (TRP). Each base station 110 can provide communication coverage for a particular geographic area. In 3rd Generation Partnership Project (3GPP), the term “cell” can refer to a coverage area of a base station 110 and / or a base station subsystem serving the coverage area, depending on the context in which the term is used.

[0035] The base stations 110 can provide communication coverage for a macro cell, a pico cell, a femto cell, and / or another type of cell. A macro cell can cover a relatively large geographic area (e.g., several kilometers in radius) and can allow unrestricted access by UEs 120 with service subscriptions. A pico cell can cover a relatively small geographic area and can allow unrestricted access by UEs 120 with service subscriptions. A femto cell can cover a relatively small geographic area (e.g., a home) and can allow restricted access by UEs 120 with associations with the femto cell (e.g., UEs 120 in a closed subscriber group (CSG)). A base station 110 for a macro cell can be referred to as a macro base station. A base station 110 for a pico cell can be referred to as a pico base station. A base station 110 for a femto cell can be referred to as a femto base station or a home base station. In Figure 1 In the example shown in FIG. 1, the BS 110a can be a macro base station for the macro cell 102a, the BS 110b can be a pico base station for the pico cell 102b, and the BS 110c can be a femto base station for the femto cell 102c. Base stations 110 can support one or more (e.g., three) cells.

[0036] In some examples, a cell can not necessarily be stationary, and the geographic area of the cell can move according to the location of a mobile base station 110 (e.g., a mobile base station). In some examples, the base stations 110 can be interconnected to one another and / or to one or more other base stations or network entities through various types of backhaul interfaces, such as a direct physical connection or a virtual network, using any suitable transport network.

[0037] In some aspects, the term “base station” (e.g., base station 110) or “network entity” can refer to an aggregated base station, a disaggregated base station, an integrated access and backhaul (IAB) node, a relay node, and / or one or more components thereof. For example, in some aspects, a “base station” or “network entity” can refer to a central unit (CU), a distributed unit (DU), a radio unit (RU), a near real-time (near-RT) RAN intelligent controller (RIC), or a non-RT RIC, or a combination thereof. In some aspects, the term “base station” or “network entity” can refer to one device configured to perform one or more functions, such as those described herein in connection with base station 110. In some aspects, the term “base station” or “network entity” can refer to multiple devices configured to perform one or more functions. For example, in some distributed systems, each of multiple different devices (which can be located in the same geographic location or different geographic locations) can be configured to perform at least a portion of a function, or repeat performance of at least a portion of the function, and the term “base station” or “network entity” can refer to any one or more of these different devices. In some aspects, the term “base station” or “network entity” can refer to one or more virtual base stations and / or one or more virtual base station functions. For example, in some aspects, two or more base station functions can be instantiated on a single device. In some aspects, the term “base station” or “network entity” can refer to one, but not the other, of base station functions. In this way, a single device can comprise more than one base station.

[0038] Wireless network 100 can include one or more relay stations. A relay station is a network entity that can receive a transmission of data from an upstream station (e.g., a network entity or a UE 120) and send a transmission of the data to a downstream station (e.g., a UE 120 or a network entity). A relay station can be a UE 120 that can relay transmissions for other UEs 120. In Figure 1 In the example shown in FIG. 1, BS 110d (e.g., a relay base station) can communicate with BS 110a (e.g., a macro base station) and UE 120d to facilitate communication between BS 110a and UE 120d. A base station 110 that relays

[0039] Wireless network 100 can be a heterogeneous network that includes network entities of different types, such as macro base stations, pico base stations, femto base stations, relay base stations, and / or the like. These different types of base stations 110 can have different transmit power levels, different coverage areas, and / or different impacts on interference in wireless network 100. For example, macro base stations can have a high transmit power level (e.g., 5 to 40 watts), whereas pico base stations, femto base stations, and relay base stations can have relatively lower transmit power levels (e.g., 0.1 to 2 watts).

[0040] The network controller 130 can be coupled to or in communication with a set of network entities and can provide coordination and control for the network entities. The network controller 130 can communicate with the base stations 110 via a backhaul communication link. The network entities can also communicate with one another directly, or indirectly via wireless or wireline backhaul communication links.

[0041] The UEs 120 can be dispersed throughout the wireless network 100, and each UE 120 can be stationary or mobile. A UE 120 can include, for example, an access terminal, a terminal, a mobile station, and / or a subscriber unit. A UE 120 can be a cellular phone (e.g., a smart phone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device, a biometric device, a wearable device (e.g., a smart watch, smart clothing, smart glasses, a smart wristband, smart jewelry (e.g., a smart ring or a smart bracelet)), an entertainment device (e.g., a music device, a video device, and / or a satellite radio), a vehicular component or sensor, a smart meter / sensor, industrial manufacturing equipment, a global positioning system device, and / or any other suitable device that is configured to communicate via a wireless medium.

[0042] Some UEs 120 can be considered machine-type communication (MTC) or evolved or enhanced machine-type communication (eMTC) UEs. MTC and / or eMTC UEs can include, for example, robots, drones, remote devices, sensors, meters, monitors, and / or location tags, that can communicate with a network entity, another device (e.g., a remote device), or some other entity. A some UEs 120 can be considered Intemet-of-Things (IoT) devices, and / or can be implemented as NB-IoT (narrowband IoT) devices. Some UEs 120 can be considered customer premises equipment. A UE 120 can be included in a housing that houses components of the UE 120, such as processor components and / or memory components. In some examples, the processor components and the memory components can be coupled together. For example, the processor components (e.g., one or more processors) and the memory components (e.g., a memory) can be operatively coupled, communicatively coupled, electronically coupled, and / or electrically coupled.

[0043] In general, any number of wireless networks 100 can be deployed in a given geographic area. Each wireless network 100 can support a particular RAT and can operate on one or more frequencies. A RAT can be referred to as a radio technology, an air interface, etc. A frequency can be referred to as a carrier, a frequency channel, etc. Each frequency channel can support a single RAT in a given geographic area in order to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks can be deployed.

[0044] In some examples, two or more UEs 120 (e.g., illustrated as UE 120a and UE 120e) can communicate directly using one or more sidelink channels (e.g., without using a network entity as an intermediary to communicate with one another). For example, UE 120 can perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by the base station 110. FIG. 2 illustrates an example wireless communications system 200 that supports techniques for sidelink resource allocation in unlicensed spectrum in accordance with aspects of the present disclosure. The wireless communications system 200 can include a base station 110-a and a UE 120-a, which can be examples of the corresponding base stations 110 and UEs 120 as described above with reference to FIG. 1. The base station 110-a and the UE 120-a can communicate over one or more sidelink channels.

[0045] Devices of wireless network 100 can communicate using the electromagnetic spectrum, which can be subdivided, according to frequency or wavelength, into various classes, bands, channels, and so on. For example, devices of wireless network 100 can communicate using one or more operating bands. In 5G NR, two initial operating bands have been identified as frequency range designations FR1 (410 MHz - 7.125 GHz) and FR2 (24.25 GHz - 52.6 GHz). It should be understood that although a portion of FR1 is greater than 6 GHz, FR1 is often referred to (interchangeably) as a “sub-6 GHz” band in various documents and articles. A similar nomenclature issue sometimes occurs with respect to FR2, which is often (interchangeably) referred to as a “millimeter wave” band in documents and articles, despite the frequencies being lower than the extremely high frequency (EHF) band (30 GHz - 300 GHz) which is designated by the International Telecommunications Union (ITU) as a “millimeter wave” band.

[0046] The frequencies between FR1 and FR2 are often referred to as mid-band frequencies. Recent 5G NR studies have identified operating bands for these mid-band frequencies as Frequency Range designations FR3 (7.125 GHz - 24.25 GHz). Bands that fall within FR3 can inherit FR1 characteristics and / or FR2 characteristics, and thus can effectively extend the features of FR1 and / or FR2 to mid-band frequencies. Moreover, higher bands are currently being explored to extend 5G NR operations beyond 52.6 GHz. For example, three higher operating bands have been identified as Frequency Range designations FR4-a or FR4-1 (52.6 GHz - 71 GHz), FR4 (52.6 GHz - 114.25 GHz), and FR5 (114.25 GHz - 300 GHz). Each of these higher bands falls within the EHF band.

[0047] With the above examples in mind, unless specifically stated otherwise, it should be understood that the term “sub-6 GHz” or the like, if used herein, can broadly represent frequencies that can be less than 6 GHz, can be within FR1, or can include mid-band frequencies. Further, unless specifically stated otherwise, it should be understood that the term “millimeter wave” or the like, if used herein, can broadly represent frequencies that can include mid-band frequencies, can be within FR2, FR4, FR4-a or FR4-1, and / or FR5, or can be within the EHF band. Modifications to the frequencies that can be included in these operating bands (e.g., FR1, FR2, FR3, FR4, FR4-a, FR4-1, and / or FR5) are considered feasible and are intended to be within the scope of the techniques described herein.

[0048] In some aspects, an apparatus of a wireless communication device (e.g., UE 120, base station 110, network entity) can include a communication manager 140 or 150. As described in more detail elsewhere herein, the communication manager 140 or 150 can obtain a signal from a digital port prior to amplification and transmission on at least a first transmit chain for a first antenna element of the wireless communication device and a second transmit chain for a second antenna element of the wireless communication device. The communication manager 140 or 150 can adjust an amplification saturation power of the signal of the first transmit chain such that a first ratio of the amplification saturation power of the first transmit chain to an amplification output power and a second ratio of the amplification saturation power of the second transmit chain to the amplification output power are aligned. The communication manager or 150 can transmit the signal in association with a wireless communication.

[0049] In some aspects, the communication manager 140 or 150 can obtain a signal from a digital port prior to amplification and transmission on at least a first transmit chain for a first antenna element of a wireless communication device and a second transmit chain for a second antenna element of the wireless communication device. The communication manager 140 or 150 can adjust an amplification output power of the signal of the first transmit chain such that a first ratio of an amplification saturation power to the amplification output power of the first transmit chain and a second ratio of an amplification saturation power to the amplification output power of the second transmit chain are aligned. The communication manager 140 or 150 can transmit the signal in association with a wireless communication. Additionally, or alternatively, the communication manager 140 or 150 can perform one or more other operations described herein.

[0050] As indicated above, Figure 1 are provided by way of example. Other examples can be utilized without departing from the scope of the disclosure. Figure 1 described differ.

[0051] Figure 2 is a diagram illustrating an example 200 in which a network entity (e.g., a base station 110) communicates with a UE 120 in a wireless network 100, in accordance with the present disclosure. The base station 110 can be equipped with a set of antennas 234a through 234t, such as T antennas (T > 1). The UE 120 can be equipped with a set of antennas 252a through 252r, such as R antennas (R > 1).

[0052] At base station 110, a transmit processor 220 can receive data from a data source 212 intended for the UE 120 (or a set of UEs 120). Transmit processor 220 can select one or more modulation and coding schemes (MCS) for the UE 120 based at least in part on one or more channel quality indicators (CQIs) received from UE 120. Base station 110 can process (e.g., encode and modulate) the data for UE 120 based at least in part on the MCS selected for the UE 120 and provide data symbols. Transmit processor 220 can process system information (e.g., for semi-static resource allocation information (SRPI)) and control information (e.g., CQI requests, grants, and / or upper layer signaling) and provide overhead symbols and control symbols. Transmit processor 220 can generate reference symbols for reference signals (e.g., a cell-specific reference signal (CRS) or a demodulation reference signal (DMRS)) and synchronization signals (e.g., a primary synchronization signal (PSS) or a secondary synchronization signal (SSS)). A transmit (TX) multiple-input multiple-output (MIMO) processor 230 can perform spatial processing (e.g., precoding) on the data symbols, the control symbols, the overhead symbols, and / or the reference symbols, if applicable, and can provide a set of output symbol streams (e.g., T output symbol streams) to a set of corresponding modems 232 (e.g., T modulators), shown as modems 232a through 232t. Each output symbol stream can be provided to a modulator component shown as MOD of a modulator 232. Each modulator 232 can use a respective modulator component to process a respective output symbol stream (e.g., for OFDM) to obtain an output sample stream. Each modulator 232 can further use a respective modulator component to process the output sample stream (e.g., convert to analog, amplify, filter, and / or upconvert) to obtain a downlink signal. Modulators 232a through 232t can transmit a set of downlink signals (e.g., T downlink signals) via a set of corresponding antennas 234 (e.g., T antennas), shown as antennas 234a through 234t.

[0053] At the UE 120, a set of antennas 252 (shown as antennas 252a through 252r) can receive the downlink signals from base station 110 and / or other base stations 110 and can provide a set of received signals (e.g., R received signals) to a set of modems 254 (e.g., R modems) (shown as modems 254a through 254r). For example, each received signal can be provided to a demodulator component (shown as DEMOD) of a modem 254. Each modem 254 can condition (e.g., filter, amplify, downconvert, and / or digitize) a received signal to obtain input samples using a respective demodulator component. Each modem 254 can further process the input samples (e.g., for OFDM) using a demodulator component to obtain received symbols. A MIMO detector 256 can obtain received symbols from modems 254, can perform MIMO detection on the received symbols if applicable, and can provide detected symbols. A receive processor 258 can process (e.g., demodulate and decode) the detected symbols, can provide decoded data for the UE 120 to a data sink 260, and can provide decoded control information and system information to a controller / processor 280. The term “controller / processor” can refer to one or more controllers, one or more processors, or combinations thereof. A channel processor can determine reference signal received power (RSRP) parameters, received signal strength indicator (RSSI) parameters, reference signal received quality (RSRQ) parameters, and / or CQI parameters, among other examples. In some examples, one or more components of UE 120 can be included in a housing 284.

[0054] Network controller 130 can include communication unit 294, controller / processor 290, and memory 292. Network controller 130 can include, for example, one or more devices in a core network. Network controller 130 can communicate with network entities via communication unit 294.

[0055] One or more antennas (e.g., antennas 234a through 234t and / or antennas 252a through 252r) can include or be included within one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, and / or one or more antenna arrays, among other examples. An antenna panel, antenna group, set of antenna elements, and / or antenna array can include one or more antenna elements (within a single housing or multiple housings), a set of co-planar antenna elements, a set of non-co-planar antenna elements, and / or one or more antenna elements coupled to one or more transmit and / or receive components (such as, for example, one or more components of a transceiver 270 and / or a transceiver 288) in a device. Figure 2 ​

[0056] On the uplink, at UE 120, a transmit processor 264 can receive and process data from a data source 262 and control information (e.g., for reports including RSRP, RSSI, RSRQ, and / or CQI) from controller / processor 280. Transmit processor 264 can generate reference symbols for one or more reference signals. The symbols from transmit processor 264 can be precoded by a TX MIMO processor 266 if applicable, further processed by modems 254 (e.g., for DFT-s-OFDM or CP-OFDM), and transmitted to network entity. In some examples, modems 254 of UE 120 can include modulators and demodulators. In some examples, UE 120 includes a transceiver. The transceiver can include any combination of antenna 252, modems 254, MIMO detector 256, receive processor 258, transmit processor 264, and / or TX MIMO processor 266. The transceiver can be used by a processor (e.g., controller / processor 280) and memory 282 to perform aspects of any of the methods described herein (for example, with reference to Figures 4 to 9 ).

[0057] At network entity (e.g., base station 110), uplink signals from UE 120 and / or other UEs can be received by antennas 234, processed by modems 232 (e.g., demodulator components of modems 232 shown as DEMOD), detected by MIMO detector 236 if applicable, and further processed by receive processor 238 to obtain decoded data and control information transmitted by UE 120. Receive processor 238 can provide the decoded data to data sink 239 and the decoded control information to controller / processor 240. The network entity can include communication unit 244 and can communicate with network controller 130 via communication unit 244. The network entity can include scheduler 246 to schedule one or more UEs 120 for downlink and / or uplink communications. In some examples, modems 232 of network entity can include modulators and demodulators. In some examples, network entity includes a transceiver. The transceiver can include any combination of antenna 234, modems 232, MIMO detector 236, receive processor 238, transmit processor 220, and / or TX MIMO processor 230. The transceiver can be used by a processor (e.g., controller / processor 240) and memory 242 to perform aspects of any of the methods described herein (for example, with reference to Figures 4 to 9 ).

[0058] As described in more detail elsewhere in this document, the controllers / processors of network entities (e.g., controller / processor 240 of base station 110), controllers / processors 280 of UE 120, and / or Figure 2 Any other component may perform one or more techniques associated with adjusting power to align the transmit chain power ratio. In some aspects, the wireless communication device described herein is UE 120, is included in UE 120, or includes... Figure 2 One or more components of the UE 120 shown herein. In some aspects, the wireless communication device described herein is a network entity, is included in a network entity, or comprises... Figure 2 One or more components of the base station 110 shown. For example, the controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other component can execute or direct, for example Figure 6 Method 600 Figure 7 The operation of method 700 and / or other processes as described herein. Memory 242 and memory 282 may store data and program code for the network entity and UE 120, respectively. In some examples, memory 242 and / or memory 282 may include a non-transitory computer-readable medium storing one or more instructions (e.g., code and / or program code) for wireless communication. For example, the one or more instructions, when executed by one or more processors of the network entity and / or UE 120 (e.g., directly executed, or executed after compilation, transformation, and / or interpretation), may cause the one or more processors, UE 120, and / or network entity to perform or direct, for example... Figure 6 Method 600 Figure 7 Method 700 and / or other procedures as described herein. In some examples, execution instructions may include run instructions, transform instructions, compile instructions, and / or interpret instructions, etc.

[0059] In some aspects, an apparatus of a wireless communication device (e.g., UE 120, base station 110, network entity) includes means for obtaining a signal from a digital port prior to amplification and transmission on at least a first transmit chain for a first antenna element of the wireless communication device and a second transmit chain for a second antenna element of the wireless communication device; means for adjusting an amplification saturation power of the signal of the first transmit chain such that a first ratio of the amplification saturation power to an amplification output power of the first transmit chain and a second ratio of the amplification saturation power to the amplification output power of the second transmit chain are aligned; and / or means for transmitting the signal in association with a wireless communication. In some aspects, means for the apparatus to perform operations described herein can include, for example, one or more of the following: communication manager 150, transmit processor 220, TX MIMO processor 230, modem 232, antenna 234, MIMO detector 236, receive processor 238, controller / processor 240, memory 242, or scheduler 246. In some aspects, means for the apparatus to perform operations described herein can include, for example, one or more of the following: communication manager 140, antenna 252, modem 254, MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, controller / processor 280, or memory 282.

[0060] In some aspects, the apparatus includes means for obtaining a signal from a digital port prior to amplification and transmission on at least a first transmit chain for a first antenna element of the wireless communication device and a second transmit chain for a second antenna element of the wireless communication device; means for adjusting an amplification output power of the signal of the first transmit chain such that a first ratio of an amplification saturation power to the amplification output power of the first transmit chain and a second ratio of the amplification saturation power to the amplification output power of the second transmit chain are aligned; and / or means for transmitting the signal in association with a wireless communication.

[0061] Although Figure 2 The blocks in FIG. 13 are illustrated as distinct components, but the functionality described above for these blocks can be implemented in a single hardware, software, or combined component or in various combinations of components. For example, the functionality described above for transmit processor 264, receive processor 258, and / or TX MIMO processor 266 can be performed by controller / processor 280 or under its control.

[0062] As indicated above, Figure 2 are provided by way of example. Other examples can differ Figure 2 from the examples described.

[0063] Figure 3is a diagram illustrating an example of a disaggregated base station 300 according to the present disclosure.

[0064] Deployment of communication systems, such as 5G NR systems, can be arranged in a variety of ways with various components or constituent parts. In a 5G NR system or network, network nodes, network entities, mobility elements of a network, radio access network (RAN) nodes, core network nodes, network elements, or network equipment, such as base stations, or one or more units (or one or more components) performing base station functionality, can be implemented in an aggregated architecture or a disaggregated architecture. For example, a BS, such as a Node B, an evolved NB (eNB), an NR BS, a 5G NB, an access point (AP), a TRP, or a cell, etc., can be implemented as an aggregated base station (also referred to as a standalone BS or a monolithic BS) or a disaggregated base station.

[0065] An aggregated base station can be configured to utilize radio protocol stacks that are physically or logically integrated within a single RAN node. A disaggregated base station can be configured to utilize protocol stacks that are physically or logically distributed between two or more units, such as one or more CUs, one or more DUs, or one or more RUs. In some aspects, a CU can be implemented within a RAN node, and one or more DUs can be co-located with the CU or, alternatively, can be geographically or virtually distributed in one or more other RAN nodes. The DUs can be implemented to communicate with one or more RUs. Each of the CUs, DUs, and RUs can also be implemented as virtual units (e.g., a virtual central unit (VCU), a virtual distributed unit (VDU), or a virtual radio unit (VRU)).

[0066] Base station type operations or network designs can take into account the aggregated nature of base station functionality. For example, a disaggregated base station can be utilized in an IAB network, an open radio access network (O-RAN (such as a network configuration initiated by the O-RAN Alliance)), or a virtualized radio access network (vRAN, also referred to as a cloud radio access network (C-RAN)). Disaggregation can include distributing functionality across two or more units at various physical locations, as well as virtually distributing functionality of at least one unit, which can enable flexibility in network design. The various units of a disaggregated base station or disaggregated RAN architecture can be configured for wired or wireless communication with at least one other unit.

[0067] The disaggregated base station 300 architecture can include one or more CUs 310, which can communicate directly with the core network 320 via a backhaul link, or indirectly with the core network 320 through one or more disaggregated base station units, such as a near-RT RIC 325 via an E2 link, or a non-RT RIC 315 associated with a service management and orchestration (SMO) framework 305, or both. The CUs 310 can communicate with one or more DUs 330 via respective fronthaul links, such as an Fl interface. The DUs 330 can communicate with one or more RUs 340 via respective front-haul links. The front-haul, fronthaul, and backhaul links can generally be referred to as “communication links.” The RUs 340 can communicate with respective UEs 120 via one or more RF access links. In some aspects, a UE 120 can be served by multiple RUs 340 simultaneously. The DUs 330 and RUs 340 can also be referred to as “O-RAN DUs (O-DUs)” and “O-RAN RUs (O-RUs),” respectively. A network entity can include a CU, a DU, a RU, or any combination of CUs, DUs, and RUs. A network entity can include a disaggregated base station or one or more components of a disaggregated base station, such as a CU, a DU, a RU, or any combination of CUs, DUs, and RUs. A network entity can also include a TRP, a relay, a passive device, an intelligent reflecting surface (IRS), or one or more of other components that can provide a network interface for or service a UE, a mobile station, a sensor / actuator, or other wireless device.

[0068] Each of these units (e.g., CU 310, DU 330, RU 340, and near-RT RIC 325, non-RT RIC 315, and SMO framework 305) can include or be coupled to one or more interfaces configured to receive or transmit signals, data, or information (collectively, signals) via wired or wireless transmission mediums. Each of the units, or an associated processor or controller providing instructions to the communication interfaces of these units, can be configured to communicate with one or more of the other units via the transmission mediums. For example, the units can include wired interfaces configured to receive or transmit signals to one or more of the other units over a wired transmission medium. Additionally, the units can include wireless interfaces, which can include receivers, transmitters, or transceivers (such as RF transceivers) configured to receive or transmit signals, or both, to one or more of the other units over a wireless transmission medium.

[0069] In some aspects, the CU 310 can host one or more higher layer control functions. Such control functions can include radio resource control (RRC), packet data convergence protocol (PDCP), service data adaptation protocol (SDAP), and / or the like. Each control function can be implemented with an interface configured to communicate signals with other control functions hosted by the CU 310. The CU 310 can be configured to process user plane functionality (i.e., central unit-user plane (CU-UP)), control plane functionality (i.e., central unit-control plane (CU-CP)), or a combination thereof. In some implementations, the CU 310 can be logically split into one or more CU-UP units and one or more CU-CP units. When implemented in an O-RAN configuration, the CU-UP units can communicate bi-directionally with the CU-CP units via an interface, such as an El interface. The CU 310 can be implemented to communicate with the DUs 330 as needed for network control and signaling.

[0070] The DUs 330 can correspond to logical units that include one or more base station functions for controlling the operation of one or more RUs 340. In some aspects, the DUs 330 can host one or more of the radio link control (RLC) layer, the medium access control (MAC) layer, and one or more high physical (PHY) layers (such as modules for forward error correction (FEC) encoding and decoding, scrambling, modulation and demodulation, and / or the like), depending at least in part on a function split, such as a function split defined by 3GPP. In some aspects, the DUs 330 can also host one or more low PHY layers. Each layer (or module) can be implemented with an interface configured to communicate signals with other layers (and modules) hosted by the DUs 330 or with control functions hosted by the CU 310.

[0071] The lower layer functionality can be implemented by one or more RUs 340. In some deployments, the RUs 340 controlled by the DUs 330 can correspond to logical nodes that host RF processing functions or low PHY layer functions (such as performing fast Fourier transform (FFT), inverse FFT (iFFT), digital beamforming, physical random access channel (PRACH) extraction and filtering, and / or the like), or both, based at least in part on a function split, such as a lower layer function split. In such an architecture, the RUs 340 can be implemented to handle over-the-air (OTA) communications with one or more UEs 120. In some implementations, real-time and non-real-time aspects of control plane and user plane communications with the RUs 340 can be controlled by the corresponding DUs 330. In some scenarios, this configuration can enable the DUs 330 and the CUs 310 to be implemented in a cloud-based RAN architecture, such as a vRAN architecture.

[0072] The SMO framework 305 can be configured to support RAN deployment and configuration of non-virtualized network elements and virtualized network elements. For non- virtualized network elements, the SMO framework 305 can be configured to support deployment of dedicated physical resources for RAN coverage requirements, which can be managed via an operations and maintenance interface, such as an Ol interface. For virtualized network elements, the SMO framework 305 can be configured to interact with a cloud computing platform, such as Open Cloud (O-Cloud) 390, to perform network element lifecycle management, such as instantiating virtualized network elements, via a cloud computing platform interface, such as an 02 interface. Such virtualized network elements can include, but are not limited to, CUs 310, DUs 330, RUs 340, and near-RT RICs 325. In some implementations, the SMO framework 305 can communicate with hardware aspects of a 4G RAN, such as Open eNB (O-eNB) 311, via an Ol interface. Additionally, in some implementations, the SMO framework 305 can communicate directly with one or more RUs 340 via an Ol interface. The SMO framework 305 can also include a non-RT RIC 315 configured to support functionality of the SMO framework 305.

[0073] The non-RT RIC 315 can be configured to include logical functions that enable near real-time control and optimization of RAN elements and resources, artificial intelligence / machine learning (AI / ML) workflows including model training and updates, or policy-based direction of applications / features in the near-RT RIC 325. The non-RT RIC 315 can be coupled to or in communication with the near-RT RIC 325, such as via an Al interface. The near-RT RIC 325 can be configured to include logical functions that enable near real-time control and optimization of RAN elements and resources via data collection and actions through an interface, such as via an E2 interface, that connects one or more CUs 310, one or more DUs 330, or both, and an O-eNB with the near-RT RIC 325.

[0074] In some implementations, to generate AI / ML models to be deployed in the near-RT RIC 325, the non-RT RIC 315 can receive parameters or external enriched information from an external server. Such information can be utilized by the near-RT RIC 325 and can be received at the SMO framework 305 or the non-RT RIC 315 from non-network data sources or from network functions. In some examples, the non-RT RIC 315 or the near-RT RIC 325 can be configured to tune RAN behavior or performance. For example, the non-RT RIC 315 can monitor long-term trends and patterns of performance and employ AI / ML models to perform corrective actions through the SMO framework 305, such as via reconfiguration of Ol, or via creation of RAN management policies, such as Al policies.

[0075] As indicated above, Figure 3 are provided by way of example. Other examples can differ Figure 3 described with respect to

[0076] Figure 4 is a diagram of an example 400 illustrating a transmit (Tx) chain 402 and a receive (Rx) chain 404 of a UE 120 in accordance with the present disclosure. In some aspects, one or more components of the Tx chain 402 can be implemented in the transmit processor 264, the TX MIMO processor 266, the modems 254, and / or the controller / processor 280, as described above in connection with Figure 2 In some aspects, the Tx chain 402 can be implemented in the UE 120 for transmitting data 406 (e.g., uplink data, uplink reference signals, and / or uplink control information) to a base station 110 on an uplink channel.

[0077] The encoder 407 can alter the signal (e.g., bit stream) 403 to data 406. The data 406 to be transmitted is provided as input from the encoder 407 to a serial-to-parallel (S / P) converter 408. In some aspects, the S / P converter 408 can split the transmit data into N parallel data streams 410.

[0078] The N parallel data streams 410 can then be provided as input to a mapper 412. The mapper 412 can map the N parallel data streams 410 onto N constellation points. The mapping can be done using a modulation constellation, such as binary phase-shift keying (BPSK), quadrature phase-shift keying (QPSK), 8-phase-shift keying (8PSK), quadrature amplitude modulation (QAM), etc. Thus, the mapper 412 can output N parallel symbol streams 416, each symbol stream 416 corresponding to one of N orthogonal subcarriers of an inverse fast Fourier transform (IFFT) component 420. The N parallel symbol streams 416 are represented in the frequency domain and can be converted to N parallel time-domain sample streams 418 by the IFFT component 420.

[0079] In some aspects, the N parallel modulations in the frequency domain correspond to N modulation symbols in the frequency domain, which are equal to N mappings and an N-point IFFT in the frequency domain, which is equal to one (useful) OFDM symbol in the time domain, which is equal to N samples in the time domain. One OFDM symbol in the time domain, Ns, is equal to Ncp (number of guard samples per OFDM symbol) + N (number of useful samples per OFDM symbol).

[0080] The N parallel time-domain sample streams 418 can be converted into an OFDM / OFDMA symbol stream 422 by a parallel-to-serial (P / S) converter 424. A guard insertion component 426 can insert guard intervals between successive OFDM / OFDMA symbols in the OFDM / OFDMA symbol stream 422. The output of the guard insertion component 426 can then be upconverted to a desired transmission band by a radio frequency (RF) front end 428. An antenna 430 can then transmit the resulting signal 432.

[0081] In some aspects, the Rx chain 404 can utilize OFDM / OFDMA. In some aspects, one or more components of the Rx chain 404 can be implemented in the receive processor 258, the MIMO detector 256, the modem 254, and / or the controller / processor 280 as described above in connection with Figure 2 In some aspects, the Rx chain 404 can be implemented in a UE 120 for receiving data 406 (e.g., downlink data, downlink reference signals, and / or downlink control information) from a base station 110 on a downlink channel.

[0082] The transmitted signal 432 is shown traveling from the Tx chain 402 to the Rx chain 404 over a wireless channel 434. When the signal 432' is received by the antenna 430', the received signal 432' can be downconverted to a baseband signal by the RF front end 428'. The guard removal component 426' can then remove the guard intervals inserted between OFDM / OFDMA symbols by the guard insertion component 426.

[0083] The output of the guard removal component 426' can be provided to an S / P converter 424'. The output can include an OFDM / OFDMA symbol stream 422', and the S / P converter 424' can divide the OFDM / OFDMA symbol stream 422' into N parallel time-domain symbol streams 418', each of which corresponds to one of N orthogonal subcarriers. An FFT component 420' can convert the N parallel time-domain symbol streams 418' into the frequency domain and output N parallel frequency-domain symbol streams 416'.

[0084] The demapper 412' can perform the inverse of the symbol mapping operation performed by the mapper 412, thereby outputting N parallel data streams 410'. The P / S converter 408' can combine the N parallel data streams 410' into a single data stream 406'. Ideally, the data stream 406' corresponds to the data 406 that was provided as input to the Tx chain 402. The data stream 406' can be decoded by the decoder 407' into a decoded data stream 403'.

[0085] Transmitters of wireless communication devices can include nonlinear components, such as high-power PAs with a limited linear dynamic range. The nonlinear nature of the components means that the transmitted signal can be distorted due to differences at higher transmit powers that result in high peak-to-average power ratio (PAPR). The nonlinear distortion can include in-band distortion, which affects link performance. The transmit quality of a link can be measured as EVM. EVM can represent the sum of distortions. The nonlinear distortion can also include out-of-band distortion, which indicates the amount of out-of-band (OOB) adjacent channel interference (ACI). ACI indicates how much the adjacent channel is “polluted” by the main transmission.

[0086] To avoid these distortions, wireless communication devices can use a power backoff (BO) technique. However, power BO comes at a cost. The higher the power BO, the lower the power efficiency and the lower the power transmitted to the medium. An alternative or additional technique is to use a digital pre-distorter (DPD) in the digital front-end of the transmitter. With a DPD, the amount of distortion is maintained at a target level while the power BO is reduced as low as possible. This can improve PA efficiency.

[0087] The front-end 428 of the example 400 can include a PA 440 and other components to control the amplified output power (P out ) of the signal 442 (from signal 403 to become the transmitted signal 432) from the digital port, up to the maximum output power of the PA 440. The maximum output power of the PA 440 can be referred to as the “amplification saturation power” or P sat . The front-end or the transmit chain with the front-end can be associated with a ratio of P out to P sat .

[0088] 5G products can use a hybrid analog and digital beamforming architecture, where a single digital port drives multiple analog chains, such as the Tx chain 402. As a result, a single DPD engine is applied to an array of PA elements, and it is assumed that all of the chains experience the same nonlinear (NL) characteristics. However, this assumption does not hold true accurately for several reasons.

[0089] In some transmitters, each digital port connects to 128 antenna elements divided into 16 boosters. While chains belonging to the same booster have similar NL characteristics, different boosters may have different NL characteristics due to process differences, physical layout, and / or other reasons. Furthermore, temperature differences may exist between boosters, which can lead to additional NL differences between chains. Amplitude reduction can be used in multi-user MIMO (MU-MIMO) to maintain spatial separation of components, but this reduction is implemented by adjusting the gain before the PA. NL differences can cause the PA power in to differ from the PA power out (P... out The ratios of ) are different (usually lower), while P sat Keep it the same. Therefore, it has a lower P. out The chain will be higher than the one with higher P out The chain has better linearity. In other words, different chains can have different NL characteristics, and therefore a single DPD engine solution can lead to EVM and / or ACLR degradation.

[0090] Figure 4 The number and arrangement of components shown are provided as an example. In reality, there may be different arrangements. Figure 4 The components shown are compared to additional components, fewer components, different components, or components arranged in a different manner. Furthermore, Figure 4 The two or more components shown can be implemented within a single component, or Figure 4 The single component shown can be implemented as multiple distributed components. Additionally or alternatively, Figure 4 The set of components shown (e.g., one or more components) can be executed as described by Figure 4 The other set of components shown performs one or more functions.

[0091] Figure 5 This is a diagram illustrating an example 500 of an alignment nonlinearity of multiple transmit chains according to this disclosure. Example 500 shows several transmit chains (Tx chain 502, Tx chain 504, Tx chain 506) among multiple transmit chains sharing a digital port. Each of these transmit chains may support an antenna element, whether it is one antenna element or multiple antenna elements.

[0092] According to the various aspects described herein, wireless communication devices (e.g., UE 120, base station 110, network entity) may have means (e.g., controller 510) for aligning non-linearities between chains driven by the same digital port. Controller 510 may include combinations of... Figure 2Any combination of the described components, and the power amplification of the chains, can be controlled. At 515, the controller can obtain a signal directly or indirectly from the digital port. The signal can be obtained from the digital port at each respective Tx chain, and can be obtained prior to amplification and transmission. At 520, the controller 510 can adjust the P out ratios between P sat to align the ratios. This can include, for example, adjusting P out and P sat of Tx chain 502 to align the ratio of Tx chain 502 and the ratio of Tx chain 504. The controller 510 can adjust P out and P sat of Tx chain 502 and / or P out and P sat of Tx chain 504 to align the respective ratios and the ratio of Tx chain 506, and so on. The controller 510 can adjust the ratios in any order or combination to align the ratios.

[0093] The ratios can be compared to each other, whether the ratios are P out / P sat or P sat / P out . Aligning a first ratio and a second ratio can be equivalent to aligning the second ratio and the first ratio. In example 500, the ratios are P sat / P out . Two ratios can be aligned if the difference (e.g., match or fall within) between the two ratios satisfies a threshold range. For example, if a first ratio of Tx chain 502 is 1.3 and a second ratio of Tx chain 504 is 1.4, the absolute difference (1.4-1.3 or 1.3-1.4) is 0.1. If the threshold range is 0.2, then the first ratio and the second ratio are aligned because 0.1 is less than 0.2. If the difference is 0.2, then the threshold range equal to 0.2 can be satisfied (or can not be satisfied based on a configuration). Conversely, if the threshold range is 0.05, then the threshold range is not satisfied. The threshold range can be configurable (e.g., via signaling from another component or device) or can be specified in stored configuration information.

[0094] In some aspects, the controller 510 can adjust the P out of the chains such that the NL characteristics of the chains are the same. As part of P out equalization, the controller 510 can adjust the P out of all of the chains such that P out is the same. This can help control the beam direction and shape. If different boosters have different P sat , the controller 510 can have to adjust P sat to align P sat between all of the chains.However, for greater efficiency, the controller 510 can focus on the alignment ratio.

[0095] In some respects, the P signal of the adjustment chain sat This includes adjusting the power supply voltage (e.g., V) of the PA in this chain. dd The controller 510 can adjust the P of the transmission chain. sat This is done by gradually narrowing the beam formed for transmitting signals. Narrowing the beam may include reducing the beam amplitude and / or reducing the beam width.

[0096] In some respects, controller 510 can apply predistortion operation to the signal before transmission. Predistortion operation can benefit from the alignment ratio. If the ratio is aligned, the predistortion operation can be uniform for the transmission chain. Controller 510 can adjust P... out or P sat This ensures the ratio is aligned.

[0097] In some aspects, adjust P out This includes adjusting the gain or bias voltage of the PA in the chain. The controller 510 can also adjust P... sat This is to set the effective isotropic radiated power (EIRP) while controlling power consumption. Power consumption can be direct current (DC) power consumption. In some aspects, the controller 510 can use an adjustable P... sat To optimize EIRP and adjust P under maximum power consumption constraints out A method for combining NL properties between all chains in an alignment chain.

[0098] At 525, controller 510 may transmit signals. This may include transmitting signals from the chain in association with wireless communication. The signals may include signals obtained from a digital port and appropriately processed by the chain.

[0099] By adjusting the power ratio to align the multiple transmit chains of the transmitter, NL characteristics can be managed more consistently across the transmit chains, thereby improving transmitter performance. The alignment ratio allows for constant DPD gain regardless of process, beamforming scheme, or other potential constraints.

[0100] Figure 5 The number and arrangement of components shown are provided as an example. In reality, there may be different arrangements. Figure 5 The components shown are compared to additional components, fewer components, different components, or components arranged in a different manner. Furthermore, Figure 5 The two or more components shown can be implemented within a single component, or Figure 5 The single component shown can be implemented as multiple distributed components. Additionally or alternatively, Figure 5 The set of components shown (e.g., one or more components) can be executed as described by Figure 5Another set of components shown perform one or more functions.

[0101] Figure 6 is a flow diagram of an example method 600 of wireless communication. The method 600 can be performed, for example, by an apparatus (e.g., the controller 510).

[0102] At 610, the apparatus can obtain the signal prior to amplification and transmission. The signal can be obtained directly or indirectly from a digital port from which multiple transmit chains obtain the signal. For example, the apparatus (e.g., using the communication manager 808 and / or the signal component 810, depicted in FIG. 8) can obtain the signal from a digital port prior to amplification and transmission on at least a first transmit chain (for a first antenna element) and a second transmit chain (for a second antenna element), as described above in connection with, for example, the method 400 of FIG. 4. Figure 8 The communication manager 808 and / or the signal component 810, depicted in FIG. 8, can obtain the signal from a digital port prior to amplification and transmission on at least a first transmit chain (for a first antenna element) and a second transmit chain (for a second antenna element), as described above in connection with, for example, the method 400 of FIG. 4. Figure 4 and described at Figure 5

[0103] At 620, the apparatus can adjust the amplification saturation power of the signal of the first transmit chain such that a ratio of the amplification saturation power of the first transmit chain to the amplification output power is aligned with a ratio of the second transmit chain. For example, the apparatus (e.g., using the communication manager 808 and / or the adjustment component 812, depicted in FIG. 8) can adjust the amplification saturation power of the signal of the first transmit chain such that the ratio of the first transmit chain is aligned with the ratio of the second transmit chain, as described above in connection with, for example, the method 400 of FIG. 4. Figure 8 The communication manager 808 and / or the adjustment component 812, depicted in FIG. 8, can adjust the amplification saturation power of the signal of the first transmit chain such that the ratio of the first transmit chain is aligned with the ratio of the second transmit chain, as described above in connection with, for example, the method 400 of FIG. 4. Figure 4 and described at Figure 5 In some aspects, individually or in combination with one or both of the first and second aspects, the method 600 includes adjusting the amplification saturation power of the first transmit chain and the amplification saturation power of the second transmit chain to cause a beam formed for transmission of the signal from the first antenna element and the second antenna element to taper.

[0104] At 630, the apparatus can adjust the amplification saturation power of the signal of the first transmit chain by adjusting a supply voltage of a power amplifier of the first transmit chain. For example, the apparatus (e.g., using the communication manager 808 and / or the adjustment component 812, depicted in FIG. 8) can adjust the supply voltage of the power amplifier of the first transmit chain, as described above in connection with, for example, the method 400 of FIG. 4. Figure 8 The communication manager 808 and / or the adjustment component 812, depicted in FIG. 8, can adjust the supply voltage of the power amplifier of the first transmit chain, as described above in connection with, for example, the method 400 of FIG. 4. Figure 4 and described at Figure 5

[0105] At 640, the apparatus can apply a predistortion operation to the signal prior to transmission. For example, the apparatus (e.g., using the communication manager 808 and / or the adjustment component 812, depicted in FIG. 8) can apply a predistortion operation to the signal prior to transmission, as described above in connection with, for example, the method 400 of FIG. 4. Figure 8 The communication manager 808 and / or the adjustment component 812, depicted in FIG. 8, can apply a predistortion operation to the signal prior to transmission, as described above in connection with, for example, the method 400 of FIG. 4. Figure 4 and described at Figure 5 ​​​

[0106] At 650, the apparatus can transmit a signal in association with the wireless communication. For example, the apparatus (e.g., using Figure 8 the communication manager 808 and / or the transmission component 804 described above in connection with, for example Figure 4 and described below in connection with Figure 5 .

[0107] In some aspects, the wireless communication device is a network entity, alone or in combination with one or more of the first through third aspects. In some aspects, the wireless communication device is a UE, alone or in combination with one or more of the first through fourth aspects.

[0108] Although Figure 6 example blocks of the method 600 are shown, in some aspects, the method 600 can include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Figure 6 In some aspects, two or more of the blocks of the method 600 can be performed in parallel.

[0109] Figure 7 is a flow diagram of an example method 700 of wireless communication. The method 700 can be performed, for example, by an apparatus (e.g., the controller 510).

[0110] At 710, the apparatus can obtain the signal from the digital port prior to amplification and transmission. For example, the apparatus (e.g., using Figure 8 the communication manager 808 and / or the signal component 810 described above in connection with, for example Figure 4 and described below in connection with Figure 5 .

[0111] At 720, the apparatus can adjust the amplified output power of the signal of the first transmit chain such that the ratio of the first transmit chain and the ratio of the second transmit chain are aligned. For example, the apparatus (e.g., using Figure 8 the communication manager 808 and / or the adjustment component 812 described above in connection with, for example Figure 4 and described below in connection with Figure 5 .

[0112] At 730, the apparatus can adjust the amplified output power by adjusting a gain or a bias voltage of the first transmit chain. For example, the apparatus (e.g., using Figure 8 the communication manager 808 and / or the adjustment component 812 described above in connection with, for example Figure 4and described above in connection with, e.g., FIG. 6. Figure 5

[0113] At 740, the apparatus can apply a predistortion operation to the signal prior to transmitting. For example, the apparatus (e.g., using Figure 8 communication manager 808 and / or adjustment component 812) can apply a predistortion operation to the signal prior to transmitting, as described above in connection with, e.g., FIG. 6. Figure 4 and described above in connection with, e.g., FIG. 6. Figure 5

[0114] At 750, the apparatus can adjust an amplification saturation power of the signal of the first transmit chain to set the EIRP while controlling power consumption or to help align a ratio. For example, the apparatus (e.g., using Figure 8 communication manager 808 and / or adjustment component 812) can adjust an amplification saturation power of the signal of the first transmit chain to set the EIRP while controlling power consumption or to help align a ratio, as described above in connection with, e.g., FIG. 6. Figure 4 and described above in connection with, e.g., FIG. 6. Figure 5

[0115] At 760, the apparatus can transmit the signal in association with the wireless communication. For example, the apparatus (e.g., using Figure 7 communication manager 808 and / or transmission component 804) can transmit the signal in association with the wireless communication, as described above in connection with, e.g., FIG. 6. Figure 7 and described above in connection with, e.g., FIG. 6. Figure 8

[0116] In some aspects, the wireless communication device is a network entity, alone or in combination with one or more of the first through fourth aspects. In some aspects, the wireless communication device is a UE, alone or in combination with one or more of the first through fifth aspects.

[0117] Although Figure 2 FIG. 7 shows example blocks of the method 700, in some aspects, the method 700 can include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Figure 1 Additionally or alternatively, two or more of the blocks of the method 700 can be performed in parallel.

[0118] Figure 2 ​​​​This is a diagram illustrating an example device 800 for wireless communication. Device 800 may be a wireless communication device (e.g., UE 120, base station 110, network entity), or may be included in, or the wireless communication device may include, device 800. In some aspects, device 800 includes a receiving component 802 and a transmitting component 804 that can communicate with each other (e.g., via one or more buses and / or one or more other components). As shown, device 800 can use the receiving component 802 and the transmitting component 804 to communicate with another device 806 (such as a UE, base station, or another wireless communication device). As further shown, device 800 may include a communication manager 808. The communication manager 808 may control and / or otherwise manage one or more operations of the receiving component 802 and / or the transmitting component 804. In some aspects, the communication manager 808 may include a combination of... Figures 1 to 5 The described UE or base station may contain one or more antennas, modems, controllers / processors, memory, or combinations thereof. The communication manager 808 may be or be similar to... Figure 6 and Figure 7 The communication manager 140 or 150 is depicted. For example, in some aspects, the communication manager 808 may be configured to perform one or more of the functions described as being performed by the communication manager 140 or 150. In some aspects, the communication manager 808 may include a receiving component 802 and / or a transmitting component 804. The communication manager 808 may include a signaling component 810 and / or a modulation component 812, etc.

[0119] In some respects, device 800 can be configured to perform the functions described herein. Figure 8 One or more operations described herein. Additionally or alternatively, the apparatus 800 may be configured to perform one or more processes described herein, such as Figure 2 Process 600 Figure 8 The process is 700. In some respects, Figure 2 The illustrated device 800 and / or one or more components may include a combination Figure 2 One or more components of the described wireless communication device. Additionally or alternatively, Figure 2 One or more components shown can be combined Figure 8 Implementation within one or more components described. Additionally or alternatively, one or more components in the component set may be implemented at least partially as software stored in memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or processor to perform the function or operation of that component.

[0120] The reception component 802 can receive communications, such as reference signals, control information, data communications, or any combination thereof, from the apparatus 806. The reception component 802 can provide received communications to one or more other components of the apparatus 800. In some aspects, the reception component 802 can perform signal processing on the received communications (such as filtering, amplifying, demodulating, analog-to-digital converting, demultiplexing, deinterleaving, de-mapping, equalizing, interference Figure 8 The one or more antennas, modems, demodulators, MIMO detectors, receive processors, controllers / processors, memories, or combination thereof, of the wireless communication device described can be included in the reception component 802.

[0121] The transmission component 804 can transmit communications, such as reference signals, control information, data communications, or any combination thereof, to the apparatus 806. In some aspects, one or more other components of the apparatus 800 can generate communications and can provide the generated communications to the transmission component 804 for transmission to the apparatus 806. In some aspects, the transmission component 804 can perform signal processing on the generated communications (such as filtering, amplifying, modulating, digital-to-analog converting, multiplexing, interleaving, mapping, or encoding, among other examples), and can transmit the processed signals to the apparatus 806. In some aspects, the transmission component 804 can include one or more antennas, modems, modulators, transmit MIMO processors, transmit processors, controllers / processors, memories, or combination thereof, of the wireless communication device described. Figure 8 The one or more antennas, modems, demodulators, MIMO detectors, receive processors, controllers / processors, memories, or combination thereof, of the wireless communication device described can be included in the reception component 802.

[0122] The signal component 810 can obtain a signal from a digital port prior to amplification and transmission on at least a first transmit chain for a first antenna element of a wireless communication device and a second transmit chain for a second antenna element of the wireless communication device. The adjustment component 812 can adjust an amplification saturation power of the signal of the first transmit chain such that a first ratio of the amplification saturation power to an amplification output power of the first transmit chain and a second ratio of an amplification saturation power to an amplification output power of the second transmit chain are aligned. The transmission component 804 can transmit the signal in association with a wireless communication.

[0123] The adjustment component 812 can apply a predistortion operation to the signal prior to transmission. The adjustment component 812 can adjust the amplification saturation power of the first transmit chain and the amplification saturation power of the second transmit chain to cause a beam formed for transmission of the signal from the first antenna element and the second antenna element to taper.

[0124] In some aspects, the signal component 810 can obtain a signal from a digital port prior to amplification and transmission on at least a first transmit chain for a first antenna element of a wireless communication device and a second transmit chain for a second antenna element of the wireless communication device. The adjustment component 812 can adjust an amplification output power of the signal of the first transmit chain such that a first ratio of an amplification saturation power to the amplification output power of the first transmit chain and a second ratio of an amplification saturation power to the amplification output power of the second transmit chain are aligned. The transmission component 804 can transmit the signal in association with a wireless communication.

[0125] The adjustment component 812 can adjust an amplification saturation power of the signal of the first transmit chain to set an effective isotropic radiated power while controlling power consumption. The adjustment component 812 can adjust the amplification saturation power of the signal of the first transmit chain such that the first ratio and the second ratio are aligned. The adjustment component 812 can apply a predistortion operation to the signal prior to transmission.

[0126] Figure 8 The number and arrangement of components shown is provided as an example. In practice, there can be additional components, fewer components, different components, or differently arranged components than those shown. Figure 8 than those shown. Additionally or alternatively, Figure 8 Two or more components shown can be implemented within a single component, or Figure 9 A single component shown can be implemented as multiple, distributed components. Additionally or alternatively, Figure 9 A set of components (one or more components) shown can be implemented to perform one or more functions described as being performed by another set of components. Figure 9 Another set of components shown can be implemented to perform one or more functions described as being performed by the set of components.

[0127] ​ is a diagram illustrating an example 900 of a hardware implementation for an apparatus 905 employing a processing system 910. The apparatus 905 can be a wireless communication device.

[0128] The processing system 910 can be implemented with a bus architecture, as represented generally by the bus 915. The bus 915 can include any number of interconnecting buses and bridges, depending on the specific application of the processing system 910 and the overall design constraints. The bus 915 links together various circuits such as the one or more processors and / or hardware components, represented by the processor 920, the illustrated components, and the computer-readable medium / memory 925. The bus 915 can also link various other circuits such as timing sources, peripherals, voltage regulators, and / or power management circuits.

[0129] The processing system 910 can be coupled to a transceiver 930. The transceiver 930 is coupled to one or more antennas 935. The transceiver 930 provides a means for communicating with various other apparatus over a transmission medium. The transceiver 930 receives a signal from the one or more antennas 935, extracts information from the received signal, and provides the extracted information to the processing system 910, specifically the reception component 802. In addition, the transceiver 930 receives information from the processing system 910, specifically the transmission component 804, and

[0130] The processing system 910 includes a processor 920 coupled to a computer- readable medium / memory 925. The processor 920 is responsible for general processing, including the execution of software stored on the computer-readable medium / memory 925. The software, when executed by the processor 920, causes the processing system 910 to perform the various functions described herein for any particular apparatus. The computer-readable medium / memory 925 can also be used for storing data that is manipulated by the processor 920 when executing software. The processing system further includes at least one of the illustrated components. These components can be software modules running in the processor 920, resident / stored in the computer-readable medium / memory 925, one or more hardware modules coupled to the processor 920, or some combination thereof.

[0131] In some aspects, the processing system 910 can be a component of the UE 120 and can include the memory 282, and / or at least one of the TX MIMO processor 266, receive (RX) processor 258, and / or controller / processor 280. In some aspects, the apparatus 905 for wireless communication includes means for obtaining a signal from a digital port prior to amplification and transmission on at least a first transmit chain for a first antenna element of the wireless communication device and a second transmit chain for a second antenna element of the wireless communication device; means for adjusting an amplification saturation power of the signal of the first transmit chain such that a first ratio of the amplification saturation power to an amplification output power of the first transmit chain and a second ratio of the amplification saturation power to the amplification output power of the second transmit chain are aligned; and / or means for transmitting the signal in association with a wireless communication. In some aspects, the apparatus 905 for wireless communication includes means for obtaining a signal from a digital port prior to amplification and transmission on at least a first transmit chain for a first antenna element of the wireless communication device and a second transmit chain for a second antenna element of the wireless communication device; means for adjusting an amplification output power of the signal of the first transmit chain such that a first ratio of an amplification saturation power to the amplification output power of the first transmit chain and a second ratio of the amplification saturation power to the amplification output power of the second transmit chain are aligned; and / or means for transmitting the signal in association with a wireless communication. The aforementioned means can be one or more of the aforementioned components of the apparatus 900 and / or processing system 910 of the apparatus 905 configured to perform the functions recited by the aforementioned means. As described elsewhere herein, the processing system 910 can include the TX MIMO processor 266, the Rx processor 258, and / or the controller / processor 280. In one configuration, the aforementioned means can be the TX MIMO processor 266, the Rx processor 258, and / or the controller / processor 280 configured to perform the functions recited by the aforementioned means.

[0132] In some aspects, the processing system 910 can be a component of the base station 110 and can include the memory 242, and / or at least one of the TX MIMO processor 230, receive processor 238, and / or controller / processor 240. As described elsewhere herein, the processing system 910 can include the TX MIMO processor 230, receive processor 238, and / or controller / processor 240. In one configuration, the aforementioned means can be the TX MIMO processor 230, receive processor 238, and / or controller / processor 240 configured to perform the functions recited by the aforementioned means.

[0133] ​ Provided by way of example. Other examples can differ ​ differently from what is described.

[0134] The following provides an overview of some aspects of the present disclosure:

[0135] Aspect 1 : A method of wireless communication performed by an apparatus of a wireless communication device, the method comprising: obtaining a signal from a digital port prior to amplification and transmission on at least a first transmit chain for a first antenna element of the wireless communication device and a second transmit chain for a second antenna element of the wireless communication device; adjusting an amplification saturation power of the signal of the first transmit chain such that a first ratio of amplification saturation power to amplification output power of the first transmit chain and a second ratio of amplification saturation power to amplification output power of the second transmit chain are aligned; and transmitting the signal in association with a wireless communication.

[0136] Aspect 2: The method of aspect 1, wherein adjusting the amplification saturation power of the signal of the first transmit chain comprises adjusting a supply voltage of a power amplifier of the first transmit chain.

[0137] Aspect 3: The method of aspect 1 or 2, further comprising applying a predistortion operation to the signal prior to transmission.

[0138] Aspect 4: The method of any of aspects 1-3, further comprising adjusting the amplification saturation power of the first transmit chain and the amplification saturation power of the second transmit chain to cause a beam formed for transmission of the signal from the first antenna element and the second antenna element to taper.

[0139] Aspect 5: The method of any of aspects 1-4, wherein the wireless communication device is a network entity.

[0140] Aspect 6: The method of any of aspects 1-5, wherein the wireless communication device is a user equipment.

[0141] Aspect 7: A method of wireless communication performed by an apparatus of a wireless communication device, the method comprising: obtaining a signal from a digital port prior to amplification and transmission on at least a first transmit chain for a first antenna element of the wireless communication device and a second transmit chain for a second antenna element of the wireless communication device; adjusting an amplification output power of the signal of the first transmit chain such that a first ratio of amplification saturation power to amplification output power of the first transmit chain and a second ratio of amplification saturation power to amplification output power of the second transmit chain are aligned; and transmitting the signal in association with a wireless communication.

[0142] Aspect 8: The method of aspect 7, wherein adjusting the amplification output power comprises adjusting a gain or a bias voltage of the first transmit chain.

[0143] Aspect 9: The method of aspect 7 or 8, further comprising adjusting the amplification saturation power of the signal of the first transmit chain to set an effective isotropic radiated power while controlling power consumption.

[0144] Aspect 10: The method of any one of aspects 7 through 9, further comprising adjusting the amplification saturation power of the signal of the first transmit chain such that the first ratio and the second ratio are aligned.

[0145] Aspect 11 : The method of any one of aspects 7 through 10, further comprising applying a pre-distortion operation to the signal prior to transmission.

[0146] Aspect 12: The method of any one of aspects 7 through 11, wherein the wireless communication device is a network entity.

[0147] Aspect 13: The method of any one of aspects 7 through 12, wherein the wireless communication device is a user equipment.

[0148] Aspect 14: An apparatus for wireless communication at a device, the apparatus comprising: a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method of one or more of aspects 1 through 13.

[0149] Aspect 15: A device for wireless communication, the device comprising: a memory; and one or more processors coupled to the memory, the one or more processors configured to perform the method of one or more of aspects 1 through 13.

[0150] Aspect 16: An apparatus for wireless communication, the apparatus comprising at least one means for performing the method of one or more of aspects 1 through 13.

[0151] Aspect 17: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method of one or more of aspects 1 through 13.

[0152] Aspect 18: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform the method of one or more of aspects 1 through 13.

[0153] The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit the aspects to the precise form disclosed. Modifications and variations can be made in light of the above disclosure or can be acquired from practice of the aspects.

[0154] As used herein, the term “component” is intended to be broadly interpreted to include hardware and / or a combination of hardware and software. “Software” shall be broadly construed to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, and / or functions, among other examples, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise. As used herein, a “processor” is implemented in hardware and / or a combination of hardware and software. It will be apparent that systems and / or methods described herein can be implemented in different forms of hardware and / or a combination of hardware and software. The actual specialized control hardware or software code used to implement these systems and / or methods is not limiting of the aspects. Thus, the operation and behavior of the systems and / or methods were described herein without reference to specific software code — because software and hardware can be designed to implement the systems and / or methods, based on the description herein, without departing from the scope of the aspects.

[0155] As used herein, depending on the context, “satisfies a threshold” can refer to a value that is greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, and / or the like.

[0156] Although features can be described or claimed in specific combinations, each combination is not intended to limit the various aspects to that combination. Many alternatives, modifications, and variations will be apparent to those skilled in the art in light of the teachings herein. Descriptions of features in each of the applications’ claims should typically be considered as property of that claim alone, and not a disavowal of others. As used herein, a phrase referring to “at least one of’ a list of items refers to any combination of those items, including single members. As an example, “at least one of a, b, and c” is intended to cover a, b, c, a-b, a-c, b-c, and a-b-c, as well as any combination of alternatives with multiples of the same element (e.g., a-a, a-a-a, a-a-b, a-a-c, a-b-b, a-c-c, b-b, b-b-b, b-b-c, c-c, and c-c-c; or, a, b, and c in any other ordering).

[0157] No element, act or instruction used herein should be construed as critical or essential unless explicitly described as such. Also, as used herein, the article “a” is intended to include one or more items, and can be used interchangeably with “one or more.” Furthermore, as used herein, the article “the” is intended to include one or more items, and can be used interchangeably with “the one or more.” Furthermore, as used herein, the terms “set” and “group” are intended to include one or more items, and can be used interchangeably with “one or more.” If only one item is intended, the phrase “only one” or similar language will be used. Also, as used herein, the terms “has,” “have,” and the like are intended to mean one or more, and can be used interchangeably with “one or more.” Further, the phrase “based on” is intended to mean “based, at least in part, on” unless explicitly stated otherwise. Also, as used herein, the term “or” is intended to be inclusive when used in a series and can be used interchangeably with “and / or,” unless explicitly stated otherwise (e.g., if used in combination with “either” or “only one of’).

Claims

1. A method of wireless communication performed by an apparatus of a wireless communication device, the method comprising: obtaining a signal from a digital port prior to amplification and transmission on at least a first transmit chain for a first antenna element of the wireless communication device and a second transmit chain for a second antenna element of the wireless communication device; adjusting an amplification saturation power of the signal of the first transmit chain such that a first ratio of amplification saturation power to amplification output power of the first transmit chain and a second ratio of amplification saturation power to amplification output power of the second transmit chain are aligned; and transmitting the signal in association with a wireless communication.

2. The method of claim 1, wherein adjusting the amplification saturation power of the signal of the first transmit chain comprises adjusting a supply voltage of a power amplifier of the first transmit chain.

3. The method of claim 1, further comprising applying a predistortion operation to the signal prior to transmission.

4. The method of claim 1, further comprising adjusting the amplification saturation power of the first transmit chain and the amplification saturation power of the second transmit chain to cause a beam formed for transmission of the signal from the first antenna element and the second antenna element to taper.

5. The method of claim 1, wherein the wireless communication device is a network entity.

6. The method of claim 1, wherein the wireless communication device is a user equipment.

7. A method of wireless communication performed by an apparatus of a wireless communication device, the method comprising: obtaining a signal from a digital port prior to amplification and transmission on at least a first transmit chain for a first antenna element of the wireless communication device and a second transmit chain for a second antenna element of the wireless communication device; adjusting an amplification output power of the signal of the first transmit chain such that a first ratio of amplification saturation power to amplification output power of the first transmit chain and a second ratio of amplification saturation power to amplification output power of the second transmit chain are aligned; and transmitting the signal in association with a wireless communication.

8. The method of claim 7, wherein adjusting the amplification output power comprises adjusting a gain or a bias voltage of the first transmit chain.

9. The method of claim 7, further comprising adjusting the amplification saturation power of the signal of the first transmit chain to set an effective isotropic radiated power while controlling power consumption.

10. The method of claim 7, further comprising adjusting an amplification saturation power of the signal of the first transmit chain such that the first ratio and the second ratio are aligned.

11. The method of claim 7, further comprising applying a predistortion operation to the signal prior to transmission.

12. The method of claim 7, wherein the wireless communication device is a network entity.

13. The method of claim 7, wherein the wireless communication device is a user equipment.

14. An apparatus of a wireless communication device, the apparatus comprising: a memory; and one or more processors coupled to the memory and configured to: obtaining a signal from a digital port prior to amplification and transmission on at least a first transmit chain for a first antenna element of the wireless communication device and a second transmit chain for a second antenna element of the wireless communication device; adjusting an amplification saturation power of the signal for the first transmit chain such that a first ratio of amplification saturation power to amplification output power for the first transmit chain and a second ratio of amplification saturation power to amplification output power for the second transmit chain are aligned; and transmitting the signal in association with a wireless communication.

15. The apparatus of claim 14, wherein to adjust the amplification saturation power of the signal for the first transmit chain, the one or more processors are configured to adjust a supply voltage of a power amplifier of the first transmit chain.

16. The apparatus of claim 14, wherein the one or more processors are configured to apply a predistortion operation to the signal prior to transmission.

17. The apparatus of claim 14, wherein the one or more processors are configured to adjust the amplification saturation power of the first transmit chain and the amplification saturation power of the second transmit chain to cause a beam formed for transmission of the signal from the first antenna element and the second antenna element to taper.

18. The apparatus of claim 14, wherein the wireless communication device is a network entity.

19. The apparatus of claim 14, wherein the wireless communication device is a user equipment.

20. An apparatus of a wireless communication device, the apparatus comprising: a memory; and one or more processors coupled to the memory and configured to: obtain a signal from a digital port prior to amplification and transmission on at least a first transmit chain for a first antenna element of the wireless communication device and a second transmit chain for a second antenna element of the wireless communication device; adjust an amplification output power of the signal for the first transmit chain such that a first ratio of amplification saturation power to amplification output power for the first transmit chain and a second ratio of amplification saturation power to amplification output power for the second transmit chain are aligned; and transmit the signal in association with a wireless communication.

21. The apparatus of claim 20, wherein to adjust the amplification output power, the one or more processors are configured to adjust a gain or a bias voltage of a first transmit chain.

22. The apparatus of claim 20, wherein the one or more processors are configured to adjust the amplification saturation power of the signal for the first transmit chain to set an effective isotropic radiated power while controlling power consumption.

23. The apparatus of claim 20, wherein the one or more processors are configured to adjust an amplification saturation power of the signal for the first transmit chain such that the first ratio and the second ratio are aligned.

24. The apparatus of claim 20, wherein the one or more processors are configured to apply a predistortion operation to the signal prior to transmission.

25. The apparatus of claim 20, wherein the wireless communication device is a network entity.

26. The apparatus of claim 20, wherein the wireless communication device is a user equipment.

27. An apparatus of a wireless communication device, comprising means for performing operations of the method of any of claims 1-13.

28. A computer program product storing one or more instructions for wireless communication that, when executed by one or more processors of a wireless communication device, can cause the one or more processors to perform operations of the method of any of claims 1-13.

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