公开(公告)号：US20140079145A1

公开(公告)日：2014-03-20

申请号：US14022042

申请日：2013-09-09

Applicant: QUALCOMM Incorporated

Inventor： Hemanth Sampath ,  Eugene Jong-Hyon Baik ,  Sameer Vermani

IPC: H04B7/06 ,  H04B7/08

CPC classification number: H04B7/0602 ,  H04B7/0811 ,  H04B7/0814

Abstract: Apparatuses, methods, and devices for wireless communication. One aspect of the subject matter described in the disclosure provides a method of selecting one of a plurality of antennas. The method includes receiving, at a first antenna, a first training field of a training frame. The method further includes receiving, at a second antenna, a second training field of the training frame. The method further includes selecting one of the first and second antennas based on at least one training field.

Abstract translation: 用于无线通信的设备，方法和设备。 在本公开中描述的主题的一个方面提供了一种选择多个天线之一的方法。 该方法包括在第一天线处接收训练帧的第一训练场。 该方法还包括在第二天线处接收训练帧的第二训练场。 该方法还包括基于至少一个训练场选择第一和第二天线之一。

公开(公告)号：US20130343433A1

公开(公告)日：2013-12-26

申请号：US13887848

申请日：2013-05-06

Applicant: Qualcomm Incorporated

Inventor： Lin Yang ,  Youhan Kim ,  Sameer Vermani ,  Tevfik Yucek ,  Hemanth Sampath

IPC: H04B1/707

CPC classification number: H04B1/707 ,  H04B17/102 ,  H04B17/26 ,  H04B17/318 ,  H04L5/0066

Abstract: Systems, methods, and devices for wireless communication are provided. In one aspect, an apparatus for wireless communication is provided. The apparatus includes a processor configured to generate a packet for transmission via a wireless signal. The packet is generated for transmission over a bandwidth of 1 MHz using at least one orthogonal frequency-division multiplexing (OFDM) symbol. The apparatus further includes a transmitter configured to transmit the packet via the wireless signal having unique power spectral density characteristics.

Abstract translation: 提供了用于无线通信的系统，方法和设备。 一方面，提供一种无线通信装置。 该装置包括处理器，其被配置为生成用于经由无线信号传输的分组。 使用至少一个正交频分复用（OFDM）符号，生成用于在1MHz的带宽上传输的分组。 该装置还包括发射机，其被配置为经由具有独特的功率谱密度特性的无线信号来传送分组。

公开(公告)号：US20130243115A1

公开(公告)日：2013-09-19

申请号：US13875638

申请日：2013-05-02

Applicant: QUALCOMM INCORPORATED

Inventor： Mohammad Hossein Taghavi Nasrabadi ,  Sameer Vermani ,  Lin Yang ,  Hemanth Sampath

IPC: H04L27/26

CPC classification number: H04L27/2647 ,  H04L5/0023 ,  H04L5/0053 ,  H04L27/2613 ,  H04L27/2628

Abstract: Systems, methods, and devices for wireless communication. In one aspect, an apparatus for wireless communication is provided. The apparatus includes a receiver configured to receive a wireless signal comprising a packet. At least a portion of the wireless signal is configured to be received over a bandwidth lower than or equal to 1.25 MHz. The packet is formed from at least one orthogonal frequency-division multiplexing (OFDM) symbol comprising thirty-two tones. The thirty-two tones correspond to frequency subcarriers within the bandwidth. The thirty-two tones of the at least one OFDM symbol are allocated as: twenty-four data tones, two pilot tones, five guard tones, and one direct current (DC) tone. The apparatus includes a processor configured to evaluate the wireless signal. The processor includes a transform module configured to convert the at least one OFDM symbol into a frequency domain signal using a thirty-two point mode.

公开(公告)号：US20130235790A1

公开(公告)日：2013-09-12

申请号：US13789152

申请日：2013-03-07

Applicant: QUALCOMM INCORPORATED

Inventor： Santosh Paul Abraham ,  Simone Merlin ,  Zhi Quan ,  Alfred Asterjadhi ,  Sameer Vermani

IPC: H04W88/04

CPC classification number: H04W48/16 ,  H04B7/15 ,  H04B7/2606 ,  H04L1/1692 ,  H04L2001/0097 ,  H04W16/26 ,  H04W48/12 ,  H04W76/10 ,  H04W84/047 ,  H04W88/04

Abstract: Systems, methods, and devices for communicating data in a wireless communications network are described herein. In some aspects, a receiver of a relay is configured to receive a relay initiator frame and a data frame. A transmitter of the relay is configured to transmit an amplified version of the data frame at a same or substantially same time as a time that the data frame is received if the relay initiator frame is received prior to the data frame.

Abstract translation: 这里描述了用于在无线通信网络中传送数据的系统，方法和设备。 在一些方面，中继站的接收机被配置为接收中继发起者帧和数据帧。 如果在数据帧之前接收到中继发起者帧，则中继器的发射机被配置为以与接收数据帧的时间相同或基本相同的时间发送数据帧的放大版本。

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：US12137015B2

公开(公告)日：2024-11-05

申请号：US18182288

申请日：2023-03-10

Applicant: QUALCOMM Incorporated

Inventor： Stephen Jay Shellhammer ,  Bin Tian ,  Sameer Vermani ,  Jialing Li Chen ,  Youhan Kim

IPC: H04W84/12 ,  H04L27/26

Abstract: This disclosure provides methods, devices and systems for wireless communication, and particularly, for generating or receiving a multi-generation physical layer protocol data unit (PPDU). The multi-generation PPDU may concurrently include a first generation-specific preamble based on a first generation of a wireless communication specification (such as that defined by the Institute of Electrical and Electronics Engineers (IEEE) 802.11 family of standards) and a second generation-specific preamble based on a second generation of the wireless communication specification in a same transmission. The generation-specific preambles may be generated based on bandwidth portions of a wireless channel that each generation-specific preamble will occupy in the multi-generation PPDU. One or more of the generation-specific preambles may be modified based on an aggregate bandwidth of the multi-generation PPDU. This disclosure includes several options for modifying one or more generation-specific preambles or data fields to accommodate their use in a multi-generation PPDU.

公开(公告)号：US12120025B2

公开(公告)日：2024-10-15

申请号：US17323563

申请日：2021-05-18

Applicant: QUALCOMM Incorporated

Inventor： Jialing Li Chen ,  Sameer Vermani ,  Bin Tian

IPC: H04L45/74

CPC classification number: H04L45/74

Abstract: This disclosure provides methods, devices and systems for generating packet preambles. Some implementations more specifically relate to preamble designs that support gains in data throughput achievable in accordance with the IEEE 802.11 be amendment, and future generations, of the IEEE 802.11 standard. Among other examples, the preamble designs of the present implementations may allow for more reliable packet detection, more accurate channel estimation, and more robust decoding of signal field (SIG) symbols. Additionally, or alternatively, the preamble designs of the present disclosure may be implemented with different lengths, modulation schemes, or transmit power compared to preamble designs that conform to existing versions of the IEEE 802.11 standard.

公开(公告)号：US11984976B2

公开(公告)日：2024-05-14

申请号：US17513849

申请日：2021-10-28

Applicant: QUALCOMM Incorporated

Inventor： Sameer Vermani ,  Bin Tian ,  Youhan Kim ,  Jialing Li Chen

IPC: H04W4/00 ,  H04L1/00 ,  H04W80/02

CPC classification number: H04L1/0036 ,  H04L1/0013 ,  H04W80/02

Abstract: This disclosure provides methods, devices and systems for interpreting reserved bits and values associated with different releases of a wireless communication protocol. In some implementations, a wireless communication device may determine whether to terminate or continue reception of a physical layer protocol convergence protocol (PLCP) protocol data unit (PPDU) if it detects a reserved bit in the physical layer preamble set to an unsupported value (such as a value different than what is defined by a version or release of the wireless communication protocol supported by the wireless communication device). In some other implementations, a wireless communication device may determine whether to terminate or continue reception of a PPDU if it detects a field in the physical layer preamble set to a reserved value (such as defined by a version or release of the wireless communication protocol supported by the wireless communication device).

公开(公告)号：US11956743B2

公开(公告)日：2024-04-09

申请号：US18062839

申请日：2022-12-07

Applicant: QUALCOMM Incorporated

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

IPC: H04W92/20 ,  H04W56/00

CPC classification number: H04W56/0015 ,  H04W92/20

Abstract: This disclosure provides systems, methods, apparatus, and computer programs encoded on computer storage media, for relative timing drift correction for distributed multi-user transmissions. In one aspect, a first access point (AP) may receive a first signal from a second AP. The first signal may be associated with a channel sounding procedure to be performed substantially simultaneously by the second AP and the first AP. The first AP may then receive a second signal from the second AP, and prior to a substantially simultaneous transmission by the second AP and the first AP. The second signal may include timing information relative to the first signal. The first AP may determine a start time of the substantially simultaneous transmission at the first AP based on the timing information, and may initiate the substantially simultaneous transmission according to the determined start time.

公开(公告)号：US11805431B2

公开(公告)日：2023-10-31

申请号：US17092702

申请日：2020-11-09

Applicant: QUALCOMM Incorporated

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

IPC: H04W24/08 ,  H04L27/26 ,  H04W84/12

CPC classification number: H04W24/08 ,  H04L27/2627 ,  H04W84/12

Abstract: This disclosure provides methods, devices and systems for link adaptation in wireless communications. Some implementations more specifically relate to transmitter-based modulation and coding scheme (MCS) selection. A transmitting device transmits a test packet, over a wireless channel, to a receiving device. The receiving device generates one or more signal-to-interference-plus-noise ratio (SINR) estimates for the wireless channel based on the received sounding packet. In some aspects, each SINR estimate may be associated with a particular modulation order. In some other aspects, each SINR estimate may be generated based on a transmitter configuration or a receiver type to be used for subsequent communications between the transmitting device and the receiving device. The receiving device transmits feedback, including the SINR estimates, to the transmitting device. The transmitting device then selects an MCS to be used for subsequent communications with the receiving device based on the SINR estimates and associated modulation orders.