公开(公告)号：US10904040B2

公开(公告)日：2021-01-26

申请号：US15778381

申请日：2015-11-26

Applicant: NOKIA SOLUTIONS AND NETWORKS OY

Inventor： Wolfgang Zirwas ,  Berthold Panzner ,  Rakash Sivasiva Ganesan ,  Markus Staudacher ,  Gerhard Kramer

IPC: H04B7/06 ,  H04B7/26 ,  H01Q21/22 ,  H04L25/02 ,  H04B7/0417 ,  H04L1/00

Abstract: A method is provided for channel estimation of an antenna array comprising multiple antenna elements. The method comprises obtaining channel state information for antenna elements with a high-end radio frequency chain, wherein the antenna elements with the high-end radio frequency chain are placed in the antenna array intermittently with antenna elements with a low-cost radio frequency chain. Channel state information is estimated for the antenna elements with the low-cost radio frequency chain, by interpolating the channel state information obtained for the antenna elements with the high-end radio frequency chain.

公开(公告)号：US20180324003A1

公开(公告)日：2018-11-08

申请号：US15778381

申请日：2015-11-26

Applicant: NOKIA SOLUTIONS AND NETWORKS OY

Inventor： Wolfgang Zirwas ,  Berthold Panzner ,  Rakash Sivasiva Ganesan ,  Markus Jaeger ,  Gerhard Kramer

IPC: H04L25/02 ,  H04B7/06 ,  H04B7/26 ,  H04B7/0417 ,  H01Q21/22

CPC classification number: H04L25/0204 ,  H01Q21/22 ,  H04B7/0417 ,  H04B7/0626 ,  H04B7/066 ,  H04B7/265 ,  H04L1/0026

Abstract: A method is provided for channel estimation of an antenna array comprising multiple antenna elements. The method comprises obtaining channel state information for antenna elements with a high-end radio frequency chain, wherein the antenna elements with the high-end radio frequency chain are placed in the antenna array intermittently with antenna elements with a low-cost radio frequency chain. Channel state information is estimated for the antenna elements with the low-cost radio frequency chain, by interpolating the channel state information obtained for the antenna elements with the high-end radio frequency chain.

公开(公告)号：US20210234618A1

公开(公告)日：2021-07-29

申请号：US16752542

申请日：2020-01-24

Applicant: Nokia Solutions and Networks Oy ,  Technische Universität München

Inventor： Ariel Leonardo Vera Villarroel ,  Gerhard Kramer

IPC: H04B14/02

Abstract: Encoders and decoders for encoding and decoding data according to a coding scheme. The encoder converts N bits of input data into M voltage signals for transmission over M parallel wires to a decoder having one or two decoding stages that recover the N bits of data from the M voltage signals. The coding scheme is an N-bit, M-wire PAM-Q code in which each voltage signal wi has one of Q voltage levels I1-IQ, where I1

公开(公告)号：US11133874B2

公开(公告)日：2021-09-28

申请号：US16752542

申请日：2020-01-24

Applicant: Nokia Solutions and Networks Oy

Inventor： Ariel Leonardo Vera Villarroel ,  Gerhard Kramer

IPC: H04B14/02 ,  H03K19/21 ,  H03K19/20

Abstract: Encoders and decoders for encoding and decoding data according to a coding scheme. The encoder converts N bits of input data into M voltage signals for transmission over M parallel wires to a decoder having one or two decoding stages that recover the N bits of data from the M voltage signals. The coding scheme is an N-bit, M-wire PAM-Q code in which each voltage signal wi has one of Q voltage levels l1-lQ, where l1

公开(公告)号：US20190036578A1

公开(公告)日：2019-01-31

申请号：US15766695

申请日：2015-10-07

Applicant: NOKIA SOLUTIONS AND NETWORKS OY

Inventor： Wolfgang Zirwas ,  Berthold Panzner ,  Simone Redana ,  Stefan Dierks ,  Markus Staudacher ,  Gerhard Kramer

IPC: H04B7/0456

Abstract: A technique is provided for selecting precoding weights in a wireless network to avoid violating a power constraint. The technique may include selecting, by an access point in a wireless network, a set of precoding weights subject to a power constraint, and applying, by the access point, the set of selected precoding weights to a set of antennas to transmit signals to the one or more user devices. Selecting a set of precoding weights may further include calculating, by the access point, the set of precoding weights for each of a plurality of beamformed signals; determining, by the access point, that the set of precoding weights for the plurality of beamformed signals, when applied to a set of antennas for transmitting signals to the one or more user devices, will violate a power constraint; determining, by the access point, that a first set of precoding weights for a first beamformed signal causes a power contribution that is greater than power contributions due to sets of precoding weights of the other beamformed signals; adjusting, by the access point, one or more precoding weights of the first set of precoding weights for the first beamformed signal such that the power constraint will not be violated when the access point applies the precoding weights, including the adjusted first set of precoding weights, to a set of antennas and transmits signals to the plurality of user devices.