公开(公告)号：US20160020865A1

公开(公告)日：2016-01-21

申请号：US14869028

申请日：2015-09-29

Applicant: QUALCOMM Incorporated

Inventor： Kim Byoung-Hoon ,  Yongbin Wei ,  Amir Dabbagh

IPC: H04J13/00 ,  H04L27/26 ,  H04J3/00 ,  H04L5/06 ,  H04B17/309 ,  H04B7/04 ,  H04L5/00

CPC classification number: H04J13/0003 ,  H04B7/0421 ,  H04B7/0671 ,  H04B7/0678 ,  H04B7/068 ,  H04B7/0697 ,  H04B17/309 ,  H04B2201/70701 ,  H04J3/00 ,  H04J13/0022 ,  H04J13/0059 ,  H04J13/0062 ,  H04L5/0023 ,  H04L5/0026 ,  H04L5/0051 ,  H04L5/06 ,  H04L25/0204 ,  H04L25/0226 ,  H04L27/2601 ,  H04L27/2613 ,  H04L27/2636

Abstract: Techniques for multiplexing pilots in a wireless transmission are described. In one aspect, a transmitter station generates multiple pilot sequences for multiple transmit antennas, with each pilot sequence comprising pilot symbols sent in the time domain on a different set of subcarriers. The transmitter station further generates multiple pilot transmissions for the transmit antennas based on the pilot sequences. In another aspect, a transmitter station generates multiple pilot sequences for multiple transmit antennas based on frequency-domain code division multiplexing (FD-CDM) of a Chu sequence defined by a transmitter-specific value. The transmitter station further generates multiple pilot transmissions for the transmit antennas based on the pilot sequences. In yet another aspect, a transmitter station generates multiple pilot transmissions for multiple transmit antennas based on a first multiplexing scheme and generates multiple data transmissions based on a second multiplexing scheme that is different from the first multiplexing scheme.

Abstract translation: 描述用于在无线传输中复用导频的技术。 在一个方面，发射机站为多个发射天线生成多个导频序列，每个导频序列包括在不同子载波集上的时域中发送的导频符号。 发射台还根据导频序列进一步为发射天线产生多个导频传输。 在另一方面，发射机站基于由发射机特定值定义的楚序列的频域码分复用（FD-CDM），为多个发射天线生成多个导频序列。 发射台还根据导频序列进一步为发射天线产生多个导频传输。 在另一方面，发射机站基于第一复用方案为多个发射天线生成多个导频传输，并且基于与第一复用方案不同的第二复用方案来生成多个数据传输。

公开(公告)号：US20190182010A1

公开(公告)日：2019-06-13

申请号：US15836803

申请日：2017-12-08

Applicant: QUALCOMM Incorporated

Inventor： Amir Dabbagh ,  Raz Bareket ,  Nissan Aloni

IPC: H04L5/00 ,  H04W72/04 ,  H04W84/12 ,  H04L1/20 ,  H04W74/08

Abstract: Certain aspects relate to methods, apparatuses, computer readable mediums and wireless nodes. For example, an apparatus generally includes (a) a processing system configured to (i) obtain a TXOP, (ii) generate a plurality of first frames, wherein one or more of the first frames include a control field having a first value and one or more of the first frames include data and (iii) apply a first MCS to the plurality of the first frames and (b) an interface configured to (i) output the modulated and coded first frames for transmission to a second apparatus during the TXOP, wherein the first value indicates the second apparatus can only transmit control information during the TXOP and (ii) obtain, during the TXOP, an ACK indicating data of at least one of the first frames was received by the second apparatus. Furthermore, the processing system is further configured to determine a first error rate based on the ACK and compare the error rate to a target error rate and take one or more actions based on the comparison.

公开(公告)号：US10237014B1

公开(公告)日：2019-03-19

申请号：US15836806

申请日：2017-12-08

Applicant: QUALCOMM Incorporated

Inventor： Amir Dabbagh ,  Raz Bareket ,  Nissan Aloni

IPC: H04L1/00 ,  H04L1/18

Abstract: Certain aspects relate to methods, apparatuses, computer readable mediums and wireless nodes. For example, an apparatus generally includes an interface configured to obtain, during a TXOP owned by a second apparatus, at least one first frame from the second apparatus and a processing system configured to (i) determine a MCS associated with the at least one first frame, (ii) increase a value of a counter if the MCS associated with the at least one first frame is the same as a MCS associated with a frame previously obtained by the apparatus during the TXOP and (iii) take one or more actions based on the counter value.

公开(公告)号：US10659188B2

公开(公告)日：2020-05-19

申请号：US16039718

申请日：2018-07-19

Applicant: QUALCOMM Incorporated

Inventor： Amir Dabbagh ,  Reuven Alpert ,  Ziv Golan ,  Hezi Hezkiyahu

IPC: H04L1/00 ,  H04L1/20 ,  H04B17/336 ,  H04B7/0413 ,  H04B7/06 ,  H04L5/00 ,  H04L12/26

Abstract: Techniques and apparatus for efficiently performing rate selection and transmit gain selection are provided. The techniques may be performed, for example, by a transmitting entity in the absence of explicit MCS selection reporting by a receiving entity. One technique includes outputting first packets for transmission using a first modulation and coding scheme (MCS) value and via a transmit power amplifier (PA) configured according to a transmit gain parameter associated with the first MCS value. Feedback indicating whether the first packets have been received is obtained, a second MCS value for second packets is selected based on the feedback, and the transmit gain parameter is adjusted if one or more criteria are met. Second packets are output for transmission using the second MCS value and, thereafter, additional packets are output for transmission based on the first MCS value and the adjusted transmit gain parameter.