公开(公告)号：US09923611B2

公开(公告)日：2018-03-20

申请号：US14485365

申请日：2014-09-12

Applicant: QUALCOMM Incorporated

Inventor： Fuyun Ling ,  Linbo Li ,  Ashok Mantravadi

IPC: H03D3/22 ,  H04B7/0404 ,  H04B7/08 ,  H04L27/26 ,  H04W72/08 ,  H04L1/00 ,  H04L25/02

CPC classification number: H04B7/0404 ,  H04B7/0805 ,  H04B7/0808 ,  H04B7/0811 ,  H04B7/0814 ,  H04B7/0857 ,  H04B7/0874 ,  H04L1/0003 ,  H04L1/0057 ,  H04L1/0066 ,  H04L25/022 ,  H04L27/2647 ,  H04W72/085

Abstract: Systems and methods are provided for enhancing signal quality at receivers in a wireless network. In one embodiment, an antenna is selected from a subset of antennas based on a signal quality parameter such as received signal power or signal-to-noise ratio (SNR). In another embodiment, multiple antennas are applied to independent signal processing paths for the respective antennas where output from the paths is then combined to enhance overall signal quality at the receiver.

公开(公告)号：US20150124661A1

公开(公告)日：2015-05-07

申请号：US14073723

申请日：2013-11-06

Applicant: QUALCOMM INCORPORATED

Inventor： Xiaoyin He ,  Ashok Mantravadi ,  Bruce A. Judson ,  Prashanth Akula

IPC: H04L5/00 ,  H04W88/06 ,  H04L5/16 ,  H04L5/14 ,  H04W52/24

CPC classification number: H04L5/0066 ,  H04L5/14 ,  H04L5/16 ,  H04W52/243 ,  H04W72/1226 ,  H04W88/02 ,  H04W88/06

Abstract: The present disclosure includes systems and methods for operating a wireless communication system in multiple modes. The system is configured in a first mode when a transmission interference in a receiver of a wireless device is below a first threshold. The system is configured in one or more intermediate modes when the transmission interference is above the first threshold and below a second threshold. The system is configured in a second mode when the transmission interference is above the second threshold. The one or more intermediate modes activate interference management processes and the wireless device transmits data and receives data simultaneously. In some embodiments, transmission interference may be based on an SINR measurement.

Abstract translation: 本公开包括用于以多种模式操作无线通信系统的系统和方法。 当无线设备的接收机中的传输干扰低于第一阈值时，系统被配置为第一模式。 当传输干扰高于第一阈值并低于第二阈值时，系统被配置成一个或多个中间模式。 当传输干扰高于第二阈值时，系统被配置为第二模式。 一个或多个中间模式激活干扰管理过程，并且无线设备同时发送数据和接收数据。 在一些实施例中，传输干扰可以基于SINR测量。

公开(公告)号：US20150092573A1

公开(公告)日：2015-04-02

申请号：US14040192

申请日：2013-09-27

Applicant: Qualcomm Incorporated

Inventor： Xiaoxia Zhang ,  Ashok Mantravadi ,  Pranav Dayal ,  Gavin Bernard Horn

IPC: H04W72/10 ,  H04W24/10

CPC classification number: H04W72/10 ,  H04B7/024 ,  H04B7/0404 ,  H04B7/0617 ,  H04B7/0691 ,  H04W24/10 ,  H04W72/1231 ,  H04W88/06

Abstract: Optimizing multiflow performance and priority across UEs and networks including receive antenna selection at the UEs, CSI measurement and reporting, and scheduling for multiflow operation. The techniques may evaluate channel conditions for a UE for multiple access points and different combinations of antennas and determine how the UE should feedback CSI for transmissions from the multiple access points. The disclosed techniques also include techniques for scheduling transmissions from the multiple access points using the CSI information to optimize multiflow performance and priority across UEs and networks. Various scheduling modes use feedback from UEs including the maximum supported rates for each link and/or rates based on the maximum sum capacity of the links used concurrently. The scheduler may maintain separate priority lists for each access point or a single priority list across both access points. The techniques may be used for multiflow operation using LTE and WLAN links.

Abstract translation: 在UE和网络之间优化多重性能和优先级，包括UE处的接收天线选择，CSI测量和报告以及多业务操作的调度。 这些技术可以评估UE针对多个接入点和天线的不同组合的信道条件，并且确定UE应该如何反馈来自多个接入点的传输的CSI。 所公开的技术还包括使用CSI信息来调度来自多个接入点的传输的技术，以优化跨UE和网络的多业务性能和优先级。 各种调度模式使用来自UE的反馈，包括每个链路的最大支持速率和/或基于同时使用的链路的最大总和容量的速率。 调度器可以在两个接入点上为每个接入点或单个优先级列表维护单独的优先级列表。 这些技术可以用于使用LTE和WLAN链路的多路操作。

公开(公告)号：US20150003380A1

公开(公告)日：2015-01-01

申请号：US14485365

申请日：2014-09-12

Applicant: QUALCOMM Incorporated

Inventor： Fuyun Ling ,  Linbo Li ,  Ashok Mantravadi

IPC: H04B7/04 ,  H04W72/08

CPC classification number: H04B7/0404 ,  H04B7/0805 ,  H04B7/0808 ,  H04B7/0811 ,  H04B7/0814 ,  H04B7/0857 ,  H04B7/0874 ,  H04L1/0003 ,  H04L1/0057 ,  H04L1/0066 ,  H04L25/022 ,  H04L27/2647 ,  H04W72/085

Abstract: Systems and methods are provided for enhancing signal quality at receivers in a wireless network. In one embodiment, an antenna is selected from a subset of antennas based on a signal quality parameter such as received signal power or signal-to-noise ratio (SNR). In another embodiment, multiple antennas are applied to independent signal processing paths for the respective antennas where output from the paths is then combined to enhance overall signal quality at the receiver.

Abstract translation: 提供了用于在无线网络中的接收机处提高信号质量的系统和方法。 在一个实施例中，基于诸如接收信号功率或信噪比（SNR）的信号质量参数从天线子集中选择天线。 在另一个实施例中，多个天线被施加到各个天线的独立信号处理路径，其中来自路径的输出然后被组合以增强接收机处的整体信号质量。

公开(公告)号：US08903021B2

公开(公告)日：2014-12-02

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: H03K9/00 ,  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：US20130121189A1

公开(公告)日：2013-05-16

申请号：US13672458

申请日：2012-11-08

Applicant: Qualcomm Incorporated

Inventor： Kapil Bhattad ,  Dhananjay Ashok Gore ,  Tamer Adel Kadous ,  Ashok Mantravadi ,  Ahmed Sadek ,  Raj Kumar

IPC: H04W72/08

CPC classification number: H04W72/082 ,  H04B7/2656 ,  H04L5/1484 ,  H04W16/14 ,  H04W72/12

Abstract: When communications of a single radio access technology (RAT), or different radio access technologies in a proximate communication spectrum are operating at the same time, potential interference between devices may occur. To reduce the interference, the time division duplex (TDD) configuration of one or more conflicting device may be altered. For example, at the edge of a communication region, TDD configurations used by edge base stations to communicate with mobile devices may be set to reduce interference. As another example, communications of a first device may be altered so the first device schedules uplink communications when a second device also has uplink communications scheduled. Other configurations may also be implemented.

Abstract translation: 当单个无线电接入技术（RAT）或邻近通信频谱中的不同无线电接入技术的通信同时工作时，可能发生设备之间的潜在干扰。 为了减少干扰，可以改变一个或多个冲突设备的时分双工（TDD）配置。 例如，在通信区域的边缘，可以设置边缘基站用于与移动设备通信的TDD配置，以减少干扰。 作为另一示例，可以改变第一设备的通信，使得当第二设备还具有调度的上行链路通信时，第一设备调度上行链路通信。 也可以实现其他配置。