公开(公告)号：US20130176879A1

公开(公告)日：2013-07-11

申请号：US13735937

申请日：2013-01-07

Applicant: Qualcomm Incorporated

Inventor： Tao Tian ,  Sameer Vermani ,  Lin Yang ,  Albert van Zelst

IPC: H04W24/02

CPC classification number: H04W24/02 ,  H04L25/0204 ,  H04L25/0228 ,  H04L25/03159 ,  H04W52/0209 ,  H04W72/042

Abstract: A method and apparatus for tracking amplitude and phase of a received low frequency signal comprising a walking pilot signal is disclosed, wherein the pilot signal changes in frequency a number of times according to a sequence that repeats. The design includes initializing a FIFO buffer and summing estimated channel power over the sequence to determine an initial total power. The design also includes, for a new received symbol, determining an updated power estimate for the new received symbol, placing the updated power estimate in the FIFO buffer, and removing a least current value from the FIFO buffer, and estimating amplitude of the signal using a sum of all updated power estimates in the FIFO buffer divided by the initial total power. The design may further include determining a delta phase value using maximum ratio combining scaled with a scaling factor.

Abstract translation: 公开了一种用于跟踪包括步行导频信号的接收低频信号的幅度和相位的方法和装置，其中导频信号根据重复的顺序频率改变多次。 该设计包括初始化FIFO缓冲器并对序列上的估计信道功率求和以确定初始总功率。 该设计还包括对于新的接收符号，确定新的接收符号的更新的功率估计，将更新的功率估计放置在FIFO缓冲器中，以及从FIFO缓冲器中去除最小电流值，以及使用 FIFO缓冲器中所有更新的功率估计值除以初始总功率的总和。 该设计可以进一步包括使用用比例因子缩放的最大比率组合来确定增量相位值。

公开(公告)号：US12244417B2

公开(公告)日：2025-03-04

申请号：US17121642

申请日：2020-12-14

Applicant: QUALCOMM Incorporated

Inventor： Stephen Jay Shellhammer ,  Sameer Vermani ,  Lin Yang ,  Jialing Li Chen ,  Dung Ngoc Doan ,  Bin Tian

IPC: H04L1/00 ,  H04B7/0452 ,  H04B7/06 ,  H04W24/10 ,  H04W84/12

Abstract: This disclosure provides systems, methods, and apparatus, including computer programs encoded on computer-readable media, for a link adaptation protocol in a wireless local area network (WLAN). In one aspect, the link adaptation protocol may be used to select a transmission rate option (such as a modulation and coding scheme (MCS)) for communications from a first WLAN device to a second WLAN device based on wireless channel conditions. This disclosure includes several example message sequences for the link adaptation protocol which can accommodate a variety of uplink or downlink data transmission designs, including single user (SU) and multi-user (MU) transmissions. The example message sequences may be used with orthogonal frequency division multiple access (OFDMA), multiple-input-multiple-output (MIMO), and beamformed transmissions.

公开(公告)号：US12192129B2

公开(公告)日：2025-01-07

申请号：US18448033

申请日：2023-08-10

Applicant: QUALCOMM Incorporated

Inventor： Lin Yang ,  Bin Tian ,  Sameer Vermani

IPC: H04L5/00 ,  H04L1/00 ,  H04L27/26 ,  H04W72/044 ,  H04W72/0453 ,  H04W80/02 ,  H04W80/08

Abstract: This disclosure provides methods, devices and systems for data parsing for resource unit (RU) aggregation. A wireless communication device (such as an access point (AP) or a station (STA)) may allocate a set of RUs for a receiving device in a basic service set (BSS). The set of RUs may be associated with multiple bandwidth segments of a bandwidth allocation and may be non-contiguous or contiguous. The wireless communication device may determine a data parsing and encoding scheme for a set of information bits. The data parsing may be implemented at a medium access control (MAC) layer or physical (PHY) layer and the encoding may correspond to a joint encoding or a separate encoding for each RU of the allocation. The wireless communication device may then distribute the coded bits to the set of RUs for transmission.

公开(公告)号：US12185125B2

公开(公告)日：2024-12-31

申请号：US17746623

申请日：2022-05-17

Applicant: QUALCOMM Incorporated

Inventor： Lin Yang ,  Bin Tian ,  Alecsander Petru Eitan ,  Youhan Kim

IPC: H04W16/28 ,  H04B7/0417 ,  H04B7/06

Abstract: This disclosure provides methods, devices and systems for increasing carrier frequencies for wireless communications in wireless local area networks. Some implementations more specifically relate to beamforming training operations that support wireless communications on carrier frequencies above 7 GHz. In some aspects, a beamforming initiator may initiate a beamforming training operation by transmitting a number (N) of beamforming training (BFT) packets in N TX beam directions, respectively, on a carrier frequency above 7 GHz. The beamforming responder receives one or more of the BFT packets and provides feedback to the beamforming initiator indicating the TX beam direction associated with the BFT packet having the highest received signal power. In some aspects, the beamforming responder may train its RX antennas for RX beamforming concurrently while the beamforming initiator trains its TX antennas. In some other aspects, the beamforming responder may train its RX antennas after the beamforming initiator trains its TX antennas.

公开(公告)号：US12184568B2

公开(公告)日：2024-12-31

申请号：US18513461

申请日：2023-11-17

Applicant: QUALCOMM Incorporated

Inventor： Lin Yang ,  Bin Tian ,  Youhan Kim ,  Qifan Chen

IPC: H04L5/00

Abstract: This disclosure provides methods, devices and systems for increasing the transmit power of wireless communication devices operating on power spectral density (PSD)-limited wireless channels. Some implementations more specifically relate to pilot tone designs that support distributed transmission. A transmitting device may modulate a physical layer convergence protocol (PLCP) protocol data unit (PPDU) on a number (M) of tones representing a logical RU associated with the legacy tone plan and may further map the M tones to M noncontiguous subcarrier indices associated with a wireless channel. The transmitting device may transmit the PPDU, over the wireless channel, with a number (N) of pilot tones each having a respective location relative to the M tones as mapped to the M noncontiguous subcarrier indices. In some implementations, the relative locations of the N pilot tones may be different than relative locations of a number (K) of pilot tones associated with the logical RU.

公开(公告)号：US12171024B2

公开(公告)日：2024-12-17

申请号：US17335243

申请日：2021-06-01

Applicant: QUALCOMM Incorporated

Inventor： Lin Yang ,  Youhan Kim ,  Bin Tian

IPC: H04W74/0816 ,  H04L27/26 ,  H04W74/00 ,  H04W84/12

Abstract: This disclosure provides systems, methods, and apparatuses for wireless communication that can be used to reduce the peak-to-average power ratio (PAPR) of data transmissions by increasing the degree of randomness with which data is scrambled for transmission over a wireless medium. In some implementations, a transmitting device may determine a scrambler seed value that includes at least 11 bits, where at least one of the 7 least significant bits (LSBs) of the scrambler seed value has a non-zero value. The transmitting device may generate a scrambling sequence based on the scrambler seed value and a polynomial, may construct a physical layer convergence protocol (PLCP) protocol data unit (PPDU) that includes a multi-user (MU) request-to-send (RTS) frame and the scrambler seed value, may scramble one or more portions of the PPDU based on the scrambling sequence; and may transmit the PPDU over a wireless medium.

公开(公告)号：US12150167B2

公开(公告)日：2024-11-19

申请号：US18480480

申请日：2023-10-03

Applicant: QUALCOMM Incorporated

Inventor： Jialing Li Chen ,  Sameer Vermani ,  Lin Yang ,  Bin Tian ,  Vincent Knowles Jones, IV ,  Youhan Kim

IPC: H04W74/00 ,  H04L5/00 ,  H04L69/18 ,  H04L69/22 ,  H04W72/0446 ,  H04W72/0453 ,  H04W72/21 ,  H04W72/23 ,  H04W84/12

Abstract: This disclosure provides methods, devices and systems for wireless communication, and particularly, methods, devices and systems for including signaling regarding enhanced features of new wireless communication protocols. The signaling may be included in various portions of a physical layer preamble of a wireless transmission. In some implementations, the physical layer preamble may be used to indicate puncturing of subbands or content channels that may carry further signaling in accordance with preamble signaling designs of this disclosure. The physical layer preamble signaling be parallelized for different subchannels of a wireless channel that consists of multiple subchannels. Some implementations of the physical layer preambles may be used to multiplex different types of wireless local area network communications into different subsets of the plurality of subchannels of the wireless channel.

公开(公告)号：US12058064B2

公开(公告)日：2024-08-06

申请号：US18323333

申请日：2023-05-24

Applicant: QUALCOMM Incorporated

Inventor： Lin Yang ,  Bin Tian ,  Qifan Chen ,  Youhan Kim

IPC: H04W28/06 ,  H04L5/00 ,  H04W52/28

CPC classification number: H04L5/0041 ,  H04L5/0048 ,  H04L5/0069 ,  H04W52/286

Abstract: This disclosure provides methods, devices and systems for increasing the transmit power of wireless communication devices operating on power spectral density (PSD)-limited wireless channels. Some implementations more specifically relate to LTF designs that support distributed transmissions. In some aspects, a transmitting device may obtain a sequence of values representing an LTF of a PPDU and may map the sequence of values to a number (N) of noncontiguous subcarrier indices of a plurality of subcarrier indices spanning a wireless channel according to a distributed tone plan. In some implementations, the transmitting device may modulate the sequence of values on N tones, representing a logical RU, and map the N tones to the N noncontiguous subcarrier indices, respectively. In some other implementations, the sequence of values may be obtained based on relative locations of the N noncontiguous subcarrier indices in the wireless channel.

公开(公告)号：US20240235582A1

公开(公告)日：2024-07-11

申请号：US18153325

申请日：2023-01-11

Applicant: QUALCOMM Incorporated

Inventor： Jialing Li CHEN ,  Lin Yang ,  Bin Tian

IPC: H04B1/04

CPC classification number: H04B1/04 ,  H04B2001/0491

Abstract: This disclosure provides wireless communication methods, components, devices and systems for applying spectral masks and spectral flatness parameters in conjunction with transmission of millimeter wave (mmWave) signals in wireless communication networks. In some examples, in conjunction with transmission of an mmWave signal, a wireless communication device can apply a derivative spectral mask featuring transitional offset ranges that correspond to transitional frequency offset ranges of a spectral mask for a nominal carrier signal, scaled according to a ratio between a bandwidth of the mmWave signal and a bandwidth of the nominal carrier signal. In some examples, the derivative spectral mask can feature an in-band frequency offset range that is wider than a scaled width of an in-band frequency offset range of the spectral mask for the nominal carrier signal.

公开(公告)号：US11929812B2

公开(公告)日：2024-03-12

申请号：US16579471

申请日：2019-09-23

Applicant: QUALCOMM Incorporated

Inventor： Lin Yang ,  Bin Tian ,  Jialing Li Chen ,  Sameer Vermani

IPC: H04B7/06 ,  H04B7/0417 ,  H04L25/02

CPC classification number: H04B7/066 ,  H04B7/0417 ,  H04L25/0204 ,  H04L25/0228

Abstract: This disclosure provides systems, devices, apparatus, and methods, including computer programs encoded on storage media, for techniques for reducing feedback information in an extremely high throughput (EHT) wireless local area network (WLAN). A receiving device (beamformee), such as a station (STA), may receive a sounding signal from a transmitting device (beamformer), such as an access point (AP), and transmit channel feedback. The receiving device may transmit the channel feedback as part of a reduced compressed beamforming feedback (CBF) operation that includes determining a first set of channel characteristics. The receiving device may select a subset of the first set of channel characteristics and determine a set of differential characteristics based on the subset. The transmitting device may then transmit the sets of characteristics as reduced CBF to the transmitting device. The transmitting device may determine a channel estimation for beamformed signaling based on the reduced CBF.