公开(公告)号：US20130177059A1

公开(公告)日：2013-07-11

申请号：US13784531

申请日：2013-03-04

Applicant: QUALCOMM Incorporated

Inventor： Ashok MANTRAVADI ,  Aamod Dinkar KHANDEKAR ,  Edward Harrison TEAGUE ,  Tamer A. KADOUS

IPC: H04L25/02

CPC classification number: H04L25/022 ,  H04L25/0218 ,  H04L25/0232

Abstract: For channel estimation in a spectrally shaped wireless communication system, an initial frequency response estimate is obtained for a first set of P uniformly spaced subbands (1) based on pilot symbols received on a second set of subbands used for pilot transmission and (2) using extrapolation and/or interpolation, where P is a power of two. A channel impulse response estimate is obtained by performing a P-point IFFT on the initial frequency response estimate. A final frequency response estimate for N total subbands is derived by (1) setting low quality taps for the channel impulse response estimate to zero, (2) zero-padding the channel impulse response estimate to length N, and (3) performing an N-point FFT on the zero-padded channel impulse response estimate. The channel frequency/impulse response estimate may be filtered to obtain a higher quality channel estimate.

Abstract translation: 对于频谱形状的无线通信系统中的信道估计，基于在用于导频传输的第二组子带上接收的导频符号，获得对于第一组P均匀间隔子带（1）的初始频率响应估计，以及（2）使用 外插和/或插值，其中P是2的幂。 通过对初始频率响应估计执行P点IFFT来获得信道脉冲响应估计。 通过（1）将信道脉冲响应估计的低质量抽头设置为零，（2）将信道脉冲响应估计零填充到长度N，得到N个总子带的最终频率响应估计，以及（3）执行N 点零点填充信道脉冲响应估计。 可以对信道频率/脉冲响应估计进行滤波以获得更高质量的信道估计。

公开(公告)号：US20230039700A1

公开(公告)日：2023-02-09

申请号：US17934825

申请日：2022-09-23

Applicant: QUALCOMM Incorporated

Inventor： Peter Pui Lok ANG ,  Wooseok NAM ,  Huilin XU ,  Muhammad Sayed Khairy ABDELGHAFFAR ,  Hung Dinh LY ,  Aamod Dinkar KHANDEKAR

IPC: H04W72/04 ,  H04W72/12

Abstract: Certain aspects of the present disclosure provide techniques for managing scheduling of wireless communications. A method that may be performed by a user equipment (UE) includes receiving, from a base station, one or more configurations indicating a plurality of minimum scheduling offset values; receiving, from the base station, a signal indicating one of the minimum scheduling offset values as an updated value to be used for communications with the base station and a type of scheduling; determining a delay based on the type of scheduling; and after the reception of the signal, using the updated value for communications with the base station based on the determined delay.

公开(公告)号：US20190052328A1

公开(公告)日：2019-02-14

申请号：US16058879

申请日：2018-08-08

Applicant: QUALCOMM Incorporated

Inventor： Prashanth AKULA ,  Alberto RICO ALVARINO ,  Aamod Dinkar KHANDEKAR ,  Helena Deirdre O'SHEA ,  Supratik BHATTACHARJEE

IPC: H04B7/06

Abstract: Certain aspects of the present disclosure relate to communication systems, and more particularly, to improving performance for sounding reference signal (SRS) antenna switching in carrier aggregation (CA). A method is provided, that may be performed by a user equipment (UE) for wireless communications. The method includes determining one or more band combinations that share an antenna switch and sending a list of one or more bands in the one or more band combinations to a base station (BS). The BS receives the list and schedules the UE based on the received list.

公开(公告)号：US20160028529A1

公开(公告)日：2016-01-28

申请号：US14875370

申请日：2015-10-05

Applicant: QUALCOMM Incorporated

Inventor： Peter GAAL ,  Wanshi CHEN ,  Jelena M. DAMNJANOVIC ,  Aamod Dinkar KHANDEKAR ,  Juan MONTOJO ,  Naga BHUSHAN

IPC: H04L5/00 ,  H04W72/04 ,  H04L1/00

CPC classification number: H04L5/0053 ,  H04L1/0071 ,  H04L5/0007 ,  H04L5/0092 ,  H04W72/042

Abstract: Methods, apparatuses, and computer program products are disclosed for facilitating indicating and detecting control region sizes. A multi-carrier communication between a wireless terminal and a base station is facilitated by a first carrier having a first control region size and a second carrier having a second control region size. Embodiments are disclosed in which control region sizes are ascertained from a control signal, wherein the control is generated by either scrambling an aspect of the control signal based on the second control region size, or relating the second control region size with the first control region size. Other disclosed embodiments for ascertaining control region sizes include a reverse interleaver embodiment, wherein a set of modulation symbols is mapped beginning from a last data symbol and ending with a first available data symbol.

Abstract translation: 公开了用于便于指示和检测控制区域尺寸的方法，装置和计算机程序产品。 无线终端和基站之间的多载波通信由具有第一控制区域大小的第一载波和具有第二控制区域大小的第二载波来促进。 公开了一种实施例，其中从控制信号确定控制区域大小，其中通过基于第二控制区域大小对控制信号的一个方面进行加扰或将第二控制区域大小与第一控制区域大小相关联来产生控制 。 用于确定控制区域大小的其他公开的实施例包括反向交织器实施例，其中一组调制符号从最后数据符号开始映射并以第一可用数据符号结束。

公开(公告)号：US20140098757A1

公开(公告)日：2014-04-10

申请号：US14030846

申请日：2013-09-18

Applicant: QUALCOMM Incorporated

Inventor： Aamod Dinkar KHANDEKAR ,  Surendra BOPPANA ,  Insung KANG ,  Vishwajeet POTNIS

IPC: H04W72/08

CPC classification number: H04W72/085 ,  H04L1/0003 ,  H04L1/0026

Abstract: When reporting a channel quality metric, such as a channel quality index (CQI) to a base station, a user equipment (UE) may base its report on a calculated spectral efficiency for allocated data channels. The UE may calculate a spectral efficiency metric over a number of subframes to arrive at an average spectral efficiency measurement which may be converted to CQI and reported to a base station.

Abstract translation: 当向基站报告诸如信道质量指数（CQI）的信道质量度量时，用户设备（UE）可以基于分配的数据信道的计算的频谱效率来基于其报告。 UE可以在多个子帧上计算频谱效率度量，以得到平均频谱效率测量值，该测量值可被转换为CQI并被报告给基站。