公开(公告)号：US20240322868A1

公开(公告)日：2024-09-26

申请号：US18589408

申请日：2024-02-27

Applicant: MAXLINEAR, INC.

Inventor： Zohaib Mahmood ,  Hajir Roozbehani ,  Alexandre Megretski ,  Yan Li

IPC: H04B7/0452 ,  H04B1/04 ,  H04B7/0456

CPC classification number: H04B7/0452 ,  H04B1/0475 ,  H04B7/0465

Abstract: According to an aspect of an embodiment, a base station configured for beamforming estimation in a massive multiple input multiple output (mMIMO) radio access network (RAN) (mMIMO-RAN) may comprise a processing device and a transceiver. The processing device may be configured to compute, at the base station, a precoder based on jointly maximizing the signal with respect to noise and minimizing an interference with respect to the noise using an approximate decoder. The processing device may be configured to compute, at the base station, the precoder based on a power constraint. The processing device may be configured to generate, at the base station, the precoder for precoding a downlink signal for transmission from the base station to a user equipment (UE). The transceiver may be configured to transmit the DL signal to the UE.

公开(公告)号：US20240275437A1

公开(公告)日：2024-08-15

申请号：US18566397

申请日：2021-06-03

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Ashkan SHEIKHI ,  Ove EDFORS ,  Fredrik RUSEK

IPC: H04B7/0452 ,  H04B7/0456 ,  H04W52/14

CPC classification number: H04B7/0452 ,  H04B7/0465 ,  H04W52/143

Abstract: There are provided mechanisms for DPD size determination of an access node. The access node is configured for operation in a digital massive MIMO system. The access node includes a plurality of antennas, one radio chain per antenna, and one DPD per radio chain. A method is performed by the access node. The method includes obtaining channel gain estimates per each of the plurality of antennas. The method includes determining the size, in terms of number of coefficients, of each DPD according to a utility function that depends on the channel gain estimates per antenna. The method includes allocating the determined number of coefficients to each DPD.

公开(公告)号：US20240187054A1

公开(公告)日：2024-06-06

申请号：US18285243

申请日：2021-04-07

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Milad FOZOONI ,  Ulf GUSTAVSSON ,  Roland CARLSSON ,  Aare MÄLLO

IPC: H04B7/0456 ,  H04L27/26

CPC classification number: H04B7/0465 ,  H04L27/2624

Abstract: A method for reducing peak-to-average power ratio, PAPR, in a Multiple Input Multiple Output, MIMO, communication system is disclosed. The method is performed in a precoder unit and includes: confining, by a differentiable cost function, power of a MIMO signal to be between a lower threshold, Plow, and an upper threshold, Pup, and applying a gradient method on the differentiable cost function until reaching a set power target for the MIMO signal, while keeping an Error Vector Magnitude, EVM, below a set EVM level.

公开(公告)号：US20230403053A1

公开(公告)日：2023-12-14

申请号：US18455059

申请日：2023-08-24

Applicant: QUALCOMM Incorporated

Inventor： Thawatt GOPAL ,  Sridhar BANDARU ,  Brian Clarke BANISTER ,  Reza SHAHIDI ,  Troy CURTISS ,  Akhil DEODHAR ,  Lin LU ,  Jagadish NADAKUDUTI

IPC: H04B7/06 ,  H04B7/0456

CPC classification number: H04B7/0602 ,  H04B7/0465 ,  H04B7/0623

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, an apparatus may determine a time-averaged power limit of a set of antennas. The apparatus may modify an antenna switching configuration based at least in part on the time-averaged power limit. The apparatus may transmit a signal using an antenna, from the set of antennas, associated with the modified antenna switching configuration, wherein the antenna is associated with a higher power limit than one or more other antennas. Numerous other aspects are described.

公开(公告)号：US20230379021A1

公开(公告)日：2023-11-23

申请号：US18027652

申请日：2020-09-23

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Majid BAVAND ,  Israfil BAHCECI ,  Haomin LI

IPC: H04B7/0456 ,  H04W52/36 ,  H04B7/06 ,  H04W52/42

CPC classification number: H04B7/0465 ,  H04W52/367 ,  H04B7/0617 ,  H04W52/42

Abstract: A method of operating a radio network node in a wireless communication system includes adaptively limiting effective isotropically radiated power, EIRP, of downlink signals transmitted by the radio network node on different physical channels. Radio network nodes that adaptively limit EIRP of downlink signals transmitted by the radio network node on different physical channels are also described.

公开(公告)号：US11812302B2

公开(公告)日：2023-11-07

申请号：US17472123

申请日：2021-09-10

Applicant: MAVENIR NETWORKS, INC.

Inventor： Sridhar Rajagopal

IPC: H04W28/06 ,  H04B7/0456 ,  H04B7/06 ,  H04L25/02 ,  H04W92/12 ,  H04W88/08 ,  H04W88/12

CPC classification number: H04W28/06 ,  H04B7/0465 ,  H04B7/0617 ,  H04L25/0256 ,  H04L25/0258 ,  H04W88/085 ,  H04W88/12 ,  H04W92/12

Abstract: There are provided systems, methods, and interfaces for optimization of the fronthaul interface bandwidth for Radio Access Networks and Cloud Radio Access Networks.

公开(公告)号：US20230308161A1

公开(公告)日：2023-09-28

申请号：US18127239

申请日：2023-03-28

Applicant: Sun Patent Trust

Inventor： Yutaka MURAKAMI ,  Tomohiro KIMURA ,  Mikihiro OUCHI

IPC: H04B7/06 ,  H04W52/42 ,  H04B7/0413 ,  H04B7/0426 ,  H04B7/0456 ,  H04B7/08 ,  H04L25/03

CPC classification number: H04B7/0697 ,  H04B7/0413 ,  H04B7/0426 ,  H04B7/0456 ,  H04B7/046 ,  H04B7/0465 ,  H04B7/0617 ,  H04B7/0682 ,  H04B7/0862 ,  H04L25/0391 ,  H04W52/42 ,  H04J11/0033

Abstract: A transmission method for transmitting a first modulated signal and a second modulated signal in the same frequency at the same time. Each signal has been modulated according to a different modulation sheme. The transmission method applies precoding on both signals using a fixed precoding matrix, applies different power change to each signal, and regularly changes the phase of at least one of the signals, thereby improving received data signal quality for a reception device.

公开(公告)号：US20230261711A1

公开(公告)日：2023-08-17

申请号：US18150607

申请日：2023-01-05

Applicant: MEDIATEK INC.

Inventor： Shao-Yu HUANG ,  Chih-Wei CHIU ,  Chih-Wei LEE

IPC: H04B7/06 ,  H04B7/0456

CPC classification number: H04B7/0617 ,  H04B7/0465

Abstract: A communication device for detecting an object includes a power module, an antenna array, a first sensor pad, a second sensor pad, and a control unit. The antenna array is excited by the power module, and is configured to provide a first beam group and a second beam group. The first sensor pad is disposed adjacent to the first side of the antenna array. A first capacitance is formed between the first sensor pad and the object. The second sensor pad is disposed adjacent to the second side of the antenna array. A second capacitance is formed between the second sensor pad and the object. The control unit controls the power module according to the first capacitance and the second capacitance, so as to selectively apply at least one power backoff operation to the first beam group and/or the second beam group.

公开(公告)号：US11695457B2

公开(公告)日：2023-07-04

申请号：US17750626

申请日：2022-05-23

Applicant: Sun Patent Trust

Inventor： Yutaka Murakami ,  Tomohiro Kimura ,  Mikihiro Ouchi

IPC: H04B7/0456 ,  H04L1/00 ,  H04B7/06 ,  H04B1/713 ,  H04L1/06 ,  H04L1/20

CPC classification number: H04B7/0465 ,  H04B1/713 ,  H04B7/0456 ,  H04B7/0469 ,  H04B7/0615 ,  H04L1/0009 ,  H04L1/005 ,  H04L1/0643 ,  H04L1/20

Abstract: Disclosed is a precoding method comprising the steps of: generating a first coded block and a second coded block with use of a predetermined error correction block coding scheme; generating a first precoded signal z1 and a second precoded signal z2 by performing a precoding process, which corresponds to a matrix selected from among the N matrices F[i], on a first baseband signal s1 generated from the first coded block and a second baseband signal s2 generated from the second coded block, respectively; the first precoded signal z1 and the second precoded signal z2 satisfying (z1, z2)T=F[i] (s1, s2)T; and changing both of or one of a power of the first precoded signal z1 and a power of the second precoded signal z2, such that an average power of the first precoded signal z1 is less than an average power of the second precoded signal z2.

公开(公告)号：US11689259B2

公开(公告)日：2023-06-27

申请号：US17721540

申请日：2022-04-15

Applicant: Sun Patent Trust

Inventor： Yutaka Murakami ,  Tomohiro Kimura ,  Mikihiro Ouchi

IPC: H04B7/0456 ,  H04B7/0417 ,  H04B7/0426 ,  H04L27/34 ,  H04L25/02 ,  H04L5/00 ,  H04L27/20 ,  H04L27/36 ,  H04B1/00

CPC classification number: H04B7/0469 ,  H04B1/0057 ,  H04B7/0417 ,  H04B7/0426 ,  H04B7/0456 ,  H04B7/0465 ,  H04L5/00 ,  H04L5/0048 ,  H04L25/0222 ,  H04L27/20 ,  H04L27/34 ,  H04L27/36 ,  H04L5/0023 ,  H04L5/0044

Abstract: A transmission apparatus that (i) generates a Quadrature Phase Shift Keying (QPSK) modulation signal s1(t) by applying a QPSK modulation scheme to a first data sequence, (ii) generates a 16-Quadrature Amplitude Modulation (QAM) modulation signal s2(t) by applying a 16-QAM modulation scheme to a second data sequence, (iii) generates a transmission signal z1(t) and a second transmission signal z2(t) by applying a phase hopping process, a precoding process, and a power adjust process to the QPSK modulation signal s1(t) and the 16-QAM modulation signal s2(t), wherein an average transmission power of the 16-QAM modulation signal s2(t) being the same as an average transmission power of the QPSK modulation signal s1(t), and (iv) transmits the transmission signal z1(t) from a first antenna at a first time and a first frequency and the second transmission signal z2(t) from a second antenna at the first time and the first frequency.