公开(公告)号：US20240178960A1

公开(公告)日：2024-05-30

申请号：US18433612

申请日：2024-02-06

Applicant: Apple Inc.

Inventor： Joonsuk Kim ,  Yuchul Kim

IPC: H04L5/00 ,  H04L1/12 ,  H04L1/1829 ,  H04L25/02 ,  H04L27/26 ,  H04W56/00 ,  H04W84/12

CPC classification number: H04L5/0048 ,  H04L1/12 ,  H04L1/1854 ,  H04L27/2656 ,  H04L27/2657 ,  H04L27/2675 ,  H04W56/002 ,  H04L5/0023 ,  H04L25/0202 ,  H04W84/12

Abstract: This disclosure relates to orthogonal frequency division multiple access (OFDMA) communication in wireless local area networks (WLANs). According to some embodiments, a downlink OFDMA frame may be transmitted. An uplink OFDMA frame including acknowledgements associated with the downlink OFDMA frame may be received. The uplink OFDMA frame may be processed, in some instances including determining which devices receiving the downlink OFDMA frame transmitted an acknowledgement associated with the downlink OFDMA frame in the uplink OFDMA frame.

公开(公告)号：US11937290B2

公开(公告)日：2024-03-19

申请号：US17325624

申请日：2021-05-20

Applicant: InterDigital Patent Holdings, Inc.

Inventor： Qing Li ,  Lakshmi R. Iyer ,  Allan Y. Tsai ,  Guodong Zhang ,  Tianyi Xu ,  Wei Chen ,  Pascal M. Adjakple ,  Joseph M. Murray

IPC: H04W72/04 ,  H04L1/1812 ,  H04L1/1829 ,  H04L5/00 ,  H04W72/566 ,  H04B7/06 ,  H04L27/26

CPC classification number: H04W72/569 ,  H04L1/1812 ,  H04L1/1861 ,  H04L5/0055 ,  H04B7/0617 ,  H04B7/0695 ,  H04L5/0051 ,  H04L27/2656 ,  H04L27/2666 ,  H04L27/2675

Abstract: Methods, systems, and apparatuses are described herein for beamforming based initial access, beam management, and beam based mobility designs for NR systems. Issues are identified and addressed related to, for example, initial access, control channel design, eMBB and URLLC mixing, and beam training.

公开(公告)号：US11895059B2

公开(公告)日：2024-02-06

申请号：US17096130

申请日：2020-11-12

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Henrik Sahlin ,  Qiang Zhang ,  Johan Furuskog ,  Stefan Parkvall

IPC: H04L27/00 ,  H04J3/00 ,  H04W72/04 ,  H03K9/00 ,  H04L5/14 ,  H04B7/26 ,  H04L27/26 ,  H04W72/0446 ,  H04L5/00 ,  H04W88/02 ,  H04W88/12

CPC classification number: H04L5/14 ,  H04B7/2615 ,  H04L27/26 ,  H04L27/2602 ,  H04W72/0446 ,  H04L5/0091 ,  H04L27/2656 ,  H04W88/02 ,  H04W88/12

Abstract: A guard period for switching between uplink and downlink subframes is created by shortening a downlink subframe, i.e., by not transmitting during one or more symbol intervals at the end of the subframe. A grant message includes signaling indicating when a shortened subframe is being transmitted. An example method is implemented in a receiving node configured to receive data from a transmitting node in subframes having a predetermined number of symbol intervals. In an LTE system, this receiving node may be a UE, and the subframes are downlink subframes. This example method includes determining that a received subframe is to be shortened, relative to the predetermined number of symbol intervals and, in response to this determination, disregarding a last part of the received subframe by disregarding one or more symbols at the end of the received subframe when processing the received subframe.

公开(公告)号：US20190215215A1

公开(公告)日：2019-07-11

申请号：US16256975

申请日：2019-01-24

Applicant: Intel Corporation

Inventor： Alexander Maltsev ,  Vadim Sergeyev ,  Alexei Vladimirovich Davydov ,  Ali S. Sadri ,  Roman Maslennikov ,  Alexey Khoryaev

IPC: H04L27/26 ,  H04W52/02 ,  H04W56/00 ,  H04W72/04 ,  H04B7/212

CPC classification number: H04L27/2656 ,  H04B7/2126 ,  H04W16/28 ,  H04W48/08 ,  H04W52/0235 ,  H04W56/0015 ,  H04W72/0453 ,  H04W84/20 ,  Y02D70/00 ,  Y02D70/1224 ,  Y02D70/1242 ,  Y02D70/1244 ,  Y02D70/1246 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/168 ,  Y02D70/22 ,  Y02D70/446

Abstract: Communication signals using a first and a second frequency band in a wireless network is described herein. The first frequency band may be associated with a first beamwidth while the second frequency band may be associated with a second beamwidth. An apparatus may include receiver circuitry arranged to receive first signals in a first frequency band associated with a first beamwidth and second signals in a second frequency band associated with a second beamwidth, the first signals comprising a frame synchronization parameter and the second signals comprising frame alignment signals. The apparatus may further include processor circuitry coupled to the receiver circuitry, the processor circuitry arranged to activate or deactivate the receiver circuitry to receive the frame alignment signals based on the frame synchronization parameter. Other embodiments may be described and/or claimed.

公开(公告)号：US20180324485A1

公开(公告)日：2018-11-08

申请号：US16030392

申请日：2018-07-09

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Min-ho KIM ,  Jung-hyun PARK ,  Sung-kyu JUNG ,  Doo-chan HWANG

IPC: H04N21/434 ,  H04N21/443 ,  H04N21/44 ,  H04N21/438 ,  H04N21/43 ,  H04L27/26

CPC classification number: H04N21/4345 ,  H04L27/2656 ,  H04N21/4302 ,  H04N21/4382 ,  H04N21/44004 ,  H04N21/443

Abstract: A receiving apparatus is provided. The receiving apparatus includes: a receiver configured to receive an input signal including a transmission frame which includes a bootstrap, a preamble, and a payload; a bootstrap detector configured to detect the bootstrap based on a correlation between the input signal and a reference signal which is pre-stored; and a signal processor configured to signal-process the preamble based on the detected bootstrap and signal-process the payload based on the signal-processed preamble, and the bootstrap detector is configured to determine the correlation by quantizing at least one of the input signal and the reference signal and then multiplexing the input signal and the reference signal at least one of which is quantized. Accordingly, an area occupied by hardware and cost can be reduced and loss of performance can be minimized.

公开(公告)号：US20180254882A1

公开(公告)日：2018-09-06

申请号：US15707889

申请日：2017-09-18

Applicant: John W. Bogdan

Inventor： John W. Bogdan

IPC: H04L7/00 ,  H04L27/26 ,  H03L7/099 ,  H03L7/085

CPC classification number: H04L7/0087 ,  H03L7/085 ,  H03L7/099 ,  H03L7/0995 ,  H03L7/22 ,  H04L27/2655 ,  H04L27/2656 ,  H04L27/2685 ,  H04L27/2688

Abstract: The Synthesizing Clock of OFDM Receiver (SCOR) is comprising methods and systems for synthesizing the OFDM receiver clock from a local clock in a feed-forward configuration, wherein the local clock is aligned in frequency to a received OFDM signal by using a frequency locked loop (FLL).

公开(公告)号：USRE46884E1

公开(公告)日：2018-05-29

申请号：US14971367

申请日：2015-12-16

Applicant: Nokia Technologies Oy

Inventor： Miika Tupala

IPC: H04L29/06 ,  H04L27/26 ,  H04L25/03

CPC classification number: H04L27/2676 ,  H04L25/03866 ,  H04L27/2613 ,  H04L27/2656 ,  H04L27/2657

Abstract: In accordance with an example embodiment of the present invention, a first bit sequence of a first length is assigned to a first group of signaling bits. Further, a second bit sequence of a second length is assigned to a second group of signaling bits. The first bit sequence is scrambled with a first scrambling sequence, and the second bit sequence is scrambled with a second scrambling sequence different from the first scrambling sequence. A first and a second orthogonal frequency-division multiplexing (OFDM) symbol are assigned to the first and the second scrambled bit sequences respectively, and the first and second orthogonal frequency-division multiplexing (OFDM) symbols are transmitted as synchronization symbols of a data frame. Further, a corresponding method for receiving the data frame, and apparatuses for transmission and reception are disclosed.

公开(公告)号：US20180145864A1

公开(公告)日：2018-05-24

申请号：US15572980

申请日：2016-07-14

Applicant: Sony Corporation

Inventor： Samuel Asangbeng ATUNGSIRI

IPC: H04L27/26

CPC classification number: H04L27/2665 ,  H04L27/2621 ,  H04L27/2649 ,  H04L27/265 ,  H04L27/2656 ,  H04L27/2671 ,  H04L27/2672 ,  H04L27/2675

Abstract: A receiver comprises a radio frequency demodulation circuit configured to detect and to recover a received signal. The received signal includes in one or more frames a preamble comprising a plurality of bootstrap OFDM symbols. A first of the bootstrap OFDM symbols has a first time domain structure configured so that a receiver can synchronise to a useful part of the bootstrap OFDM symbols and one or more of the other bootstrap OFDM symbols have at least a second time domain structure and carry layer one signalling data indicating parameters for detecting and recovering payload data carried by the one or more frames. The receiver comprises a detector circuit configured to detect from one or more of the bootstrap OFDM symbols a synchronisation timing and an inverse Fourier transformer configured to convert the temporal length of the bootstrap OFDM symbols or the payload OFDM symbols from the time domain into the frequency domain in accordance with the identified synchronisation timing. The detection circuit includes a first correlator adapted to the first time domain structure of the first bootstrap OFDM symbol and one or more second correlators adapted to the second time domain structure of the one or more other bootstrap OFDM symbols, one or more delay units configured to delay a first correlation result produced by the first correlator and the at least one second correlation result produced by the one or more second correlators so that the correlation results are produced contemporaneously for the first and the one or more other bootstrap OFDM symbols

公开(公告)号：US09973368B2

公开(公告)日：2018-05-15

申请号：US14909043

申请日：2013-08-12

Applicant: Harman International Industries, Incorporated

Inventor： Wenjiang Pei ,  Jinguang Hao ,  Kai Wang ,  Zeng Yang

IPC: H04L27/26 ,  H04L29/08 ,  H04W56/00

CPC classification number: H04L27/2656 ,  H04L27/2646 ,  H04L27/2671 ,  H04L27/2675 ,  H04L67/12 ,  H04W56/003

Abstract: A fine timing method is provided. The method comprises: calculating values of a first timing metric function based on cross-correlation between a received signal and M training sequences within a time period, to obtain a plurality of sets of X values spaced according to a certain pattern; calculating summations for the plurality of sets of X values, respectively; and determining the beginning of a data frame based on the calculated summations.

公开(公告)号：US09923748B2

公开(公告)日：2018-03-20

申请号：US15011493

申请日：2016-01-30

Applicant: BROADCOM CORPORATION

Inventor： Ron Porat ,  Leo Montreuil

IPC: H04L27/26 ,  H04W40/02 ,  H04W72/04 ,  H04L1/00 ,  H04L5/00 ,  H04L25/02

CPC classification number: H04L27/2656 ,  H04L1/00 ,  H04L1/0025 ,  H04L1/0072 ,  H04L1/0075 ,  H04L5/0007 ,  H04L25/0224 ,  H04L27/2613 ,  H04W40/02 ,  H04W72/044 ,  Y02D70/00

Abstract: A wireless communication device (alternatively, device) includes a processor configured to support communications with other wireless communication device(s) and to generate and process signals for such communications. In some examples, the device includes a communication interface and a processor, among other possible circuitries, components, elements, etc. to support communications with other wireless communication device(s) and to generate and process signals for such communications. Short training field (STF) sequences are designed using a base binary sequence. In some examples, the base binary sequence is specified as [−1, −1 −1 +1 +1 +1 −1, +1, +1 +1 −1 +1 +1 −1, +1]. One STF includes the base binary sequence mapped. Another STF includes the base binary sequence followed by 0 followed by a phased rotated version of the base binary sequence. Another STF includes the base binary sequence followed by 0 followed by an inverted version of the base binary sequence.