公开(公告)号：US11388031B2

公开(公告)日：2022-07-12

申请号：US17352730

申请日：2021-06-21

申请人： AT&T Intellectual Property I, L.P.

发明人： SaiRamesh Nammi ,  Arunabha Ghosh

IPC分类号： H04L25/03 ,  H03F1/32 ,  H03F3/189 ,  H04L25/02 ,  H04L25/49 ,  H04W52/16

摘要： Facilitating the reduction and/or mitigation of spatial emissions in a multi antenna wireless communications system is provided herein. A system can comprise a memory that stores executable instructions that, when executed by a processor, facilitate performance of operations that can comprise applying a first signal linearization to a first output signal of a first power amplifier based on a determination that an adjacent channel leakage ratio of the first output signal of the first power amplifier fails to satisfy a defined output value. The operations can also comprise applying a second signal linearization to a group of output signals of a group of power amplifiers for a defined azimuth direction associated with channel frequencies of the group of output signals and applying a third signal linearization to the group of output signals for a defined elevation direction associated with the channel frequencies of the group of output signals.

公开(公告)号：US11387795B2

公开(公告)日：2022-07-12

申请号：US17154394

申请日：2021-01-21

申请人： Qorvo US, Inc.

发明人： Nadim Khlat ,  Terry J. Stockert

IPC分类号： H03F3/24 ,  H03F3/21 ,  H04B7/0452 ,  H04B1/04 ,  H03F1/32

摘要： An uplink multiple input-multiple output (MIMO) transmitter apparatus includes a transmitter chain that includes a sigma-delta circuit that creates a summed (sigma) signal and a difference (delta) signal from two original signals to be transmitted. These new sigma and delta signals are amplified by power amplifiers to a desired output level before having two signals reconstructed from the amplified sigma and amplified delta signals by a second circuit. These reconstructed signals match the two original signals in content but are at a desired amplified level relative to the two original signals. The reconstructed signals are then transmitted through respective antennas as uplink signals. By employing this uplink MIMO transmitter apparatus, it is possible to use smaller power amplifiers, which may reduce footprint, power consumption, and costs of the uplink MIMO transmitter apparatus.

公开(公告)号：US20220216834A1

公开(公告)日：2022-07-07

申请号：US17567641

申请日：2022-01-03

申请人： NEWRACOM, INC.

发明人： Seong-Sik MYOUNG ,  Ryun Woo KIM

IPC分类号： H03F1/32 ,  H04B1/04 ,  H03F3/24

摘要： A radio frequency (RF) transmitter includes an analog RF power amplifier and a digital Dynamic Error Vector Magnitude (DEVM) correction module. The DEVM correction module compensates for time-dependent variations in an instantaneous gain of the RF power amplifier. The time-dependent variations may be variations that occur during a period the RF power amplifier is turned on. The RF transmitter may further include one or more analog baseband circuits, and one or more respective baseband digital pre-distortion (DPD) modules that compensate for amplitude modulation to amplitude modulation (AM2AM) nonlinearities in the analog baseband circuits. The digital DEVM correction module and baseband DPD modules may each include respective look-up tables having values determined by respective calibration operations.

公开(公告)号：US20220200540A1

公开(公告)日：2022-06-23

申请号：US17557907

申请日：2021-12-21

申请人： ULAK HABERLESME A.S.

发明人： DESDINA KOF ,  ALI ARSAL ,  ALPER SINAV ,  ALI METIN BALCI

IPC分类号： H03F1/32 ,  H03F3/24 ,  H04B1/04

摘要： The non-linear behavior of power amplifier is linearized using a pre-distorter that is adaptive to changes in the behavior of the power amplifier and uses an artificial neural network. According to embodiments presented here, the pre-distorter's artificial neural network is model-trained from time to time to learn the inverse of the transfer function of the power amplifier by using a second pre-distorter modeling system. The second modeling system determines the parameters of the inverse of the transfer function of the power amplifier using a least square method by using the (un-distorted) output signal samples of the power amplifier. Using the output of the second system as output to train the neural network enables the neural network to more successfully linearize the power amplifier's behavior. Furthermore, the trained artificial neural network as the pre-distorter can be implemented in hardware and presents a small form factor.

公开(公告)号：US11368133B2

公开(公告)日：2022-06-21

申请号：US17063075

申请日：2020-10-05

申请人： Intel Corporation

发明人： Andrea Camuffo ,  Sandro Pinarello

IPC分类号： H04L27/04 ,  H03F3/24 ,  H04B1/04 ,  H04W52/02 ,  H03F1/32 ,  H03F1/02

摘要： An apparatus of a transmitter and method are provided, the apparatus comprising a processor that calculates a supply voltage (SV) value (SVV) to provide as an SV for a power amplifier (PA) of the transmitter for transmissions during a transmission time slot (TS). When the SV

公开(公告)号：US11333907B2

公开(公告)日：2022-05-17

申请号：US16383309

申请日：2019-04-12

申请人： ROCKLEY PHOTONICS LIMITED

发明人： David Arlo Nelson ,  Vivek Raghuraman ,  David Erich Tetzlaff ,  Karlheinz Muth ,  Vivek Raghunathan

IPC分类号： G02F1/01 ,  H03F1/32 ,  H04B10/50 ,  H04B10/588 ,  H03F3/217 ,  H03F3/24 ,  H03K17/687 ,  H03K19/20

摘要： A system including an optical engine. In some embodiments, the system includes an integrated circuit in a first-level package, and the system includes the optical engine, in the first-level package, and the optical engine includes an electro-optical chip.

公开(公告)号：US20220115991A1

公开(公告)日：2022-04-14

申请号：US17645076

申请日：2021-12-20

申请人： SAMSUNG ELECTRONICS CO., LTD.

发明人： HONGMIN CHOI ,  JUNSE LEE ,  HYUNSEOK YU ,  YOUNGIK CHO

IPC分类号： H03F1/32 ,  H03F3/24 ,  H04B1/04 ,  H03F3/189

摘要： A device configured to perform wireless communication includes: a pre-distortion circuit configured to generate a pre-distorted input signal by performing pre-distortion on an input signal based on a parameter set comprising a plurality of coefficients; a power amplifier configured to generate an output signal by amplifying an RF signal based on the pre-distorted input signal; and a parameter obtaining circuit configured to obtain second memory polynomial modeling information corresponding to an operating frequency band based on first memory polynomial modeling information corresponding to each of a plurality of frequency sections and obtain a parameter set according to an indirect learning structure by using the second memory polynomial modeling information.

公开(公告)号：US20220115990A1

公开(公告)日：2022-04-14

申请号：US17510249

申请日：2021-10-25

申请人： DALI WIRELESS, INC.

发明人： Dali YANG ,  Jia YANG

IPC分类号： H03F1/32 ,  H03F3/24 ,  H04L1/00 ,  H04B1/04

摘要： An embodiment of the invention is a time-delay invariant predistortion approach to linearize power amplifiers in wireless RF transmitters. The predistortion architecture is based on the stored-compensation or memory-compensation principle by using a combined time-delay addressing method, and therefore, the architecture has an intrinsic, self-calibrating time-delay compensation function. The predistortion architecture only uses a lookup table to conduct both the correction of non-linear responses of a power amplifier and the compensation of any time-delay effects presented in the same system. Due to the time-delay invariant characteristic, the predistortion design has a wider dynamic range processing advantage for wireless RF signals, and therefore can be implemented in multi-carrier and multi-channel wireless systems.

公开(公告)号：US20220115989A1

公开(公告)日：2022-04-14

申请号：US17069725

申请日：2020-10-13

申请人： Raytheon Company

发明人： Thanh Thien Tran ,  David G. Haedge

IPC分类号： H03F1/32 ,  H03F1/02 ,  H03F1/30 ,  H03F3/45

摘要： A common-mode rejection receiver including a first differential amplifier arranged to receive a differential signal including receiving a positive signal of the differential signal at a first non-inverting input port and receiving a negative signal of the differential signal at a first inverting input port, and output a first differentiated signal based on a voltage differential between the positive signal and the negative signal. A clamping circuit is arranged to limit a magnitude of the first differentiated signal to a pre-determined limit. A second differential amplifier is arranged to receive the positive signal at a second inverting input port and receive the negative signal at a second non-inverting input port, and output a second differentiated signal. A matching circuit is arranged to receive the second differentiated signal output and output a matched signal. A summing circuit adds the clamped signal and matched signal and outputs a receiver output signal.

公开(公告)号：US11303251B2

公开(公告)日：2022-04-12

申请号：US16753143

申请日：2018-10-01

申请人： NanoSemi, Inc.

发明人： Yu-Chen Wu ,  Yanyu Huang ,  Zohaib Mahmood ,  Helen H. Kim

IPC分类号： H03F1/32 ,  H03F3/24 ,  H04B1/04 ,  H04L27/36

摘要： Disclosed are methods, systems, devices, apparatus, media, and other implementations, including a method for digital predistortion for a power amplifier system. The method includes determining one or more system characteristics for the power amplifier system comprising at least a power amplifier that produces output with non-linear distortions, with the one or more system characteristics corresponding to an estimate for a complex load metric for the power amplifier system coupled to a load. The method further includes determining, based on the one or more system characteristics corresponding to the estimate for the complex load metric, digital predistortion (DPD) coefficients to compensate for the nonlinear behavior of the power amplifier system.