公开(公告)号：US20170164289A1

公开(公告)日：2017-06-08

申请号：US14957964

申请日：2015-12-03

Applicant: QUALCOMM Incorporated

Inventor： Mahbod Mofidi ,  RaviKiran Gopalan

IPC: H04W52/02 ,  H04W4/00

CPC classification number: H04W52/0245 ,  H04B1/1027 ,  H04W4/80 ,  H04W52/0229 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/162 ,  Y02D70/166 ,  Y02D70/22 ,  Y02D70/40

Abstract: Systems and methods are disclosed that may detect a likely presence of a narrow band signal in the presence of wide-band interference without powering up a wireless receiver. A wireless device may receive a wireless signal, measure a first energy level in a first frequency band associated with an expected frequency band of the narrow band wireless signal, measure a second energy level in a second frequency band that is offset from and non-overlapping with the first frequency band, and determine whether a difference between the first energy level and the second energy level exceeds a threshold. A wireless receiver of the wireless device may be powered up based at least in part on the difference between the first energy level and the second energy level exceeding the threshold.

公开(公告)号：US20150312707A1

公开(公告)日：2015-10-29

申请号：US14795782

申请日：2015-07-09

Applicant: QUALCOMM Incorporated

Inventor： Le Nguyen Luong ,  RaviKiran Gopalan ,  Koorosh Akhavan

IPC: H04W4/00 ,  H04B5/00

CPC classification number: H04B5/00 ,  H04B5/0031 ,  H04L7/042 ,  H04L7/10 ,  H04W4/80

Abstract: Aspects disclosed herein relate to improving acquisition for NFC load modulation. In one example, a communications device is equipped to monitor at least a complex component of load modulation of a carrier signal, detect, using a NFC technology type specific peak detection scheme, a peak associated with at least the complex component, and determine a presence of a packet beginning pattern based on the detected peak. In an aspect, the packet beginning pattern may be associated with a reception of a packet from a target NFC device.

Abstract translation: 本文公开的方面涉及改进对NFC负载调制的采集。 在一个示例中，通信设备被配备为监视载波信号的负载调制的至少一个复杂分量，使用NFC技术类型特定的峰值检测方案检测与至少复杂分量相关联的峰值，并且确定存在 基于检测到的峰值的分组开始模式。 在一方面，分组开始模式可以与来自目标NFC设备的分组的接收相关联。

公开(公告)号：US20150124906A1

公开(公告)日：2015-05-07

申请号：US14292616

申请日：2014-05-30

Applicant: QUALCOMM Incorporated

Inventor： RaviKiran Gopalan ,  Le Nguyen Luong

IPC: H04L27/12 ,  H04L27/20

CPC classification number: H04L27/12 ,  H04L25/4908 ,  H04L27/20

Abstract: A method for improving communication sensitivity by a wireless communication device is described. The method includes obtaining a string of bits. The method also includes mapping each bit in the string of bits to a pre-allocated bit pattern to create a series of concatenated pre-allocated bit patterns. The method further includes generating a modulated signal based on the series. The method additionally includes transmitting the modulated signal.

Abstract translation: 描述了一种通过无线通信设备提高通信灵敏度的方法。 该方法包括获得一串比特。 该方法还包括将比特串中的每个比特映射到预先分配的比特模式以创建一系列级联的预先分配的比特模式。 该方法还包括基于该系列生成调制信号。 该方法还包括发送调制信号。

公开(公告)号：US08942278B2

公开(公告)日：2015-01-27

申请号：US13791737

申请日：2013-03-08

Applicant: QUALCOMM Incorporated

Inventor： Koorosh Akhavan ,  RaviKiran Gopalan ,  Eunmo Kang ,  Le Nguyen Luong

IPC: H04B3/46 ,  H04B17/00 ,  H04B5/00 ,  H04Q1/20

CPC classification number: H04B5/00

Abstract: In a wireless near field communication (NFC) system, a target, such as a smart card, can communicate with an initiator, such as a card reader, by load modulating a radio frequency (RF) signal generated by the initiator. When two or more targets load modulate the RF signal generated, “collisions” can occur with the load modulation. Apparatus and methods detect the presence or absence of collisions in a lower layer or physical layer and report the presence of detected collisions to an upper layer for further handling.

Abstract translation: 在无线近场通信（NFC）系统中，诸如智能卡的目标可以通过负载调制由发起者产生的射频（RF）信号与诸如读卡器的发起者进行通信。 当两个或多个目标负载调制产生的RF信号时，负载调制可能会发生“碰撞”。 装置和方法检测下层或物理层中是否存在碰撞，并将检测到的碰撞的存在报告给上层进行进一步处理。

公开(公告)号：US20140080414A1

公开(公告)日：2014-03-20

申请号：US14020702

申请日：2013-09-06

Applicant: QUALCOMM Incorporated

Inventor： RaviKiran Gopalan ,  James Y. Hurt ,  Faramarz Sabouri ,  Thinh Nguyen

IPC: H04B5/00

CPC classification number: H04B5/0043 ,  H04B5/0031 ,  H04B5/0037 ,  H04B5/0075 ,  H04B5/0093

Abstract: Systems, methods, and devices for wireless communication are included herein. An aspect of the subject matter described in the disclosure provides a device configured to detect a transmission. The device includes a receiver configured to receive an inductive communication signal having a center frequency. The device further includes an analog-to-digital converter configured to sample the signal at a rate higher than twice the center frequency. The device further includes one or more processors configured to digitally downconvert the signal. The processors are further configured to compare an energy of the downconverted signal to a detection threshold. The device further includes a transmitter configured to selectively transmit a communication based on the comparison.

Abstract translation: 本文包括用于无线通信的系统，方法和设备。 在本公开中描述的主题的一个方面提供了被配置为检测传输的设备。 该设备包括接收器，其被配置为接收具有中心频率的感应通信信号。 该装置还包括配置成以高于中心频率两倍的速率对信号进行采样的模拟 - 数字转换器。 该设备还包括被配置为数字地下变频信号的一个或多个处理器。 处理器还被配置为将下变频信号的能量与检测阈值进行比较。 所述设备还包括被配置为基于所述比较选择性地发送通信的发射机。

公开(公告)号：US20140073241A1

公开(公告)日：2014-03-13

申请号：US13736174

申请日：2013-01-08

Applicant: QUALCOMM INCORPORATED

Inventor： Le Nguyen Luong ,  RaviKiran Gopalan ,  Koorosh Akhavan

IPC: H04B5/00

CPC classification number: H04W4/008 ,  H04B5/00 ,  H04B5/0031 ,  H04L7/042 ,  H04L7/10 ,  H04W4/80

Abstract: Aspects disclosed herein relate to improving acquisition for NFC load modulation. In one example, a communications device is equipped to monitor at least a complex component of load modulation of a carrier signal, detect, using a NFC technology type specific peak detection scheme, a peak associated with at least the complex component, and determine a presence of a packet beginning pattern based on the detected peak. In an aspect, the packet beginning pattern may be associated with a reception of a packet from a target NFC device.

Abstract translation: 本文公开的方面涉及改进对NFC负载调制的采集。 在一个示例中，通信设备被配备为监视载波信号的负载调制的至少一个复杂分量，使用NFC技术类型特定的峰值检测方案检测与至少复杂分量相关联的峰值，并且确定存在 基于检测到的峰值的分组开始模式。 在一方面，分组开始模式可以与来自目标NFC设备的分组的接收相关联。

公开(公告)号：US09100847B2

公开(公告)日：2015-08-04

申请号：US13786593

申请日：2013-03-06

Applicant: QUALCOMM Incorporated

Inventor： RaviKiran Gopalan

IPC: H04W24/02 ,  H04W56/00 ,  H04W48/14 ,  A61B5/145 ,  H04B1/00

CPC classification number: H04W24/02 ,  A61B5/14 ,  A61B5/150847 ,  G06F19/00 ,  G06F19/3418 ,  H04B1/00 ,  H04W48/14 ,  H04W56/0095

Abstract: Systems, methods, and devices for determining an acquisition threshold boundary value and applying that boundary value to identify which incoming signals are directed to a device, based on matching the device syncword with the syncword for the incoming signal. For some implementations using ANT protocol, syncwords composed of the last four bits of the preamble and first 14 bits of the network address identify each device. Incoming syncwords are correlated with the device's syncword, and the correlation compared to threshold boundary value which is based on the characteristics of the individual syncword, including syncword bit stream inter-symbol interference.

Abstract translation: 用于确定采集阈值边界值并且基于将设备同步字与输入信号的同步字匹配来应用该边界值以识别哪些输入信号被引导到设备的系统，方法和设备。 对于使用ANT协议的一些实现，由前导码的最后四位组成的同步字和网络地址的前14位标识每个设备。 进入的同步字与设备的同步字相关，并且相关性与基于单个同步字的特性的阈值边界值相比较，包括同步字比特流符号间干扰。

公开(公告)号：US09571314B1

公开(公告)日：2017-02-14

申请号：US14863418

申请日：2015-09-23

Applicant: QUALCOMM Incorporated

Inventor： Yu-Han Yang ,  RaviKiran Gopalan ,  Markos Troulis ,  Seyed Mohammad Ehsan Hosseini

IPC: H04B1/7093 ,  H04L27/14 ,  H04L27/12 ,  H04L27/38

CPC classification number: H04L27/14 ,  H04L27/12 ,  H04L27/2017 ,  H04L27/3872

Abstract: A method for wireless communication is described. The method includes receiving a signal that is pattern-mapped and Gaussian frequency-shift keying (GFSK) modulated. The method also includes performing a joint demapping and demodulation of the received signal based on a stored accumulated phase. The method may further include updating the stored accumulated phase based on the joint demapping and demodulation.

Abstract translation: 描述了一种用于无线通信的方法。 该方法包括接收模式映射和高斯频移键控（GFSK）调制的信号。 该方法还包括基于存储的累积相位执行对接收信号的联合解映射和解调。 该方法还可以包括基于联合解映射和解调来更新存储的累积相位。

公开(公告)号：US09276788B2

公开(公告)日：2016-03-01

申请号：US14576511

申请日：2014-12-19

Applicant: QUALCOMM Incorporated

Inventor： RaviKiran Gopalan

IPC: H04L27/14 ,  H04W4/00

CPC classification number: H04L27/14 ,  H04L1/0047 ,  H04L1/0054 ,  H04L1/0057 ,  H04L1/08 ,  H04W4/80

Abstract: A method of joint demodulating and demapping of a digital signal includes receiving a first sequence of the digital signal. The digital signal has a pattern in which a norm of an ideal transmitted sequence of symbols for zero is equal to a norm of an ideal transmitted sequence of symbols for one. The method also includes defining a portion of the first sequence as a third sequence, determining, for each element of a set of the third sequence, one of a real part of a value or an imaginary part of the value of the element, calculating a value for a combination of the determined one of the real part of the value or the imaginary part of the value for the each element of the set, and setting a bit equal to one in response to the value for the combination being less than zero.

Abstract translation: 联合解调和解映射数字信号的方法包括接收数字信号的第一序列。 数字信号具有其中理想发送的零符号序列的范数等于理想发送的符号序列的范数为1的模式。 所述方法还包括将所述第一序列的一部分定义为第三序列，为所述第三序列的集合的每个元素确定所述元素的值的实部或所述元素的虚部的一个，计算所述第一序列的值 为组合的每个元素的值的实部或虚部的确定的一个的组合的值，以及响应于组合的值小于零而设置等于1的位的值。

公开(公告)号：US20160036501A1

公开(公告)日：2016-02-04

申请号：US14490818

申请日：2014-09-19

Applicant: QUALCOMM Incorporated

Inventor： RaviKiran Gopalan ,  Danlu Zhang

IPC: H04B7/04 ,  H04B15/00 ,  H04B7/06

CPC classification number: H04B7/0413 ,  G06F13/4204 ,  G06F2213/0038 ,  H04B7/00 ,  H04B7/0626 ,  H04B15/00

Abstract: Multiple input multiple output (MIMO) communication systems and methods for chip to chip and intrachip communication are disclosed. In one aspect, MIMO techniques that have been applied to wireless communication systems are applied to interchip and intrachip communication systems. In particular, a transfer function is applied at the transmitter, and a reverse transfer function is applied at the receiver. The transfer function dynamically changes based on channel conditions to cancel or otherwise mitigate electromagnetic interference (EMI) and crosstalk conditions. In an exemplary aspect, a sum of power levels across the channels may have a maximum. To abide by such power level constraint, the transfer function may be optimized to reduce interference while remaining within the power level constraint.

Abstract translation: 公开了用于芯片到芯片和内部通信的多输入多输出（MIMO）通信系统和方法。 在一个方面，已经应用于无线通信系统的MIMO技术被应用于芯片间和内部通信系统。 特别地，在发射机处应用传递函数，并且在接收机处应用反向传递函数。 传输函数根据信道条件动态地改变，以消除或以其他方式减轻电磁干扰（EMI）和串扰条件。 在示例性方面，通道上的功率电平之和可以具有最大值。 为了遵守这种功率级约束，可以优化传递函数以减少干扰，同时保持在功率级约束内。