公开(公告)号：US09820230B2

公开(公告)日：2017-11-14

申请号：US14852234

申请日：2015-09-11

Applicant: Texas Instruments Incorporated

Inventor： Jaiganesh Balakrishnan ,  Sarma Sundareswara Gunturi

IPC: H04L5/12 ,  H04W52/02 ,  H04B1/16 ,  H04L27/26 ,  H04W84/12

CPC classification number: H04W52/0232 ,  H04B1/16 ,  H04L27/2656 ,  H04L27/2663 ,  H04W52/0229 ,  H04W84/12 ,  Y02D70/142 ,  Y02D70/144

Abstract: The disclosure provides a low power receiver. The receiver includes a first channel that receives an RF signal and generates an input signal. The receiver also includes a second channel and a packet detection circuit. The packet detection circuit is coupled to the first channel and the second channel. The packet detection circuit detects a valid packet in the input signal, and activates the second channel on detection of the valid packet.

公开(公告)号：US09756572B2

公开(公告)日：2017-09-05

申请号：US14560011

申请日：2014-12-04

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Sriram Murali ,  Sarma Gunturi ,  Jaiganesh Balakrishnan ,  Murugesh Subramaniam ,  Harikrishna Parthasarathy

IPC: H04W52/02 ,  H04W76/04 ,  H04L5/16 ,  H04L25/49 ,  H04L27/14 ,  H04B1/44

CPC classification number: H04W52/028 ,  H04B1/44 ,  H04L5/16 ,  H04L25/4902 ,  H04L27/14 ,  H04W76/28 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/168

Abstract: Circuits and methods for reducing power consumption in a half-duplex transceiver are disclosed. In an embodiment, a power management circuit of half-duplex transceiver includes direct current to direct current (DC-DC) converter and snooze mode controller. The DC-DC converter includes switching circuit and driver circuit to drive the switching circuit. The DC-DC converter provides power supply to at least one element of a transmitter sub-system of the half-duplex transceiver, and operates in snooze control modes. The snooze mode controller is coupled to the DC-DC converter and configured to generate a control signal based on at least one transceiver operating input, where the control signal causes the DC-DC converter to operate in one of the snooze control modes, the snooze control modes corresponding to snooze duty cycles and where in each snooze control mode, the switching circuit and the driver circuit remain in an OFF-state based on a respective snooze duty cycle.

公开(公告)号：US09647867B2

公开(公告)日：2017-05-09

申请号：US14962286

申请日：2015-12-08

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Karthik Khanna Subramani ,  Nagarajan Viswanathan ,  Avinash Vasudev Sakleshpur ,  Jaiganesh Balakrishnan

IPC: H04B10/06 ,  H04L27/38 ,  H04B1/10

CPC classification number: H04L27/3863 ,  H04B1/1036 ,  H04B1/30 ,  H04L27/0014

Abstract: A direct down-conversion (DDC) front end receiver includes first Q-channel that filters a sum of PRBS and baseband quadrature signals to generate a first filtered quadrature signal, a second Q-channel that filters a difference of the baseband and PRBS signals to generate a second filtered quadrature signal, a first I-channel and a second I-channel, Q-path and I-path PRBS cancellation blocks for cancelling corresponding PRBS components from sum of first and second filtered quadrature signals and sum of first and second filtered inphase signals respectively, Q-path and I-path sum filter estimation blocks for estimating quadrature and inphase sum filter responses. An IQ mismatch compensation filter estimate and tracking block estimates IQ mismatch compensation filter response from estimated quadrature and inphase sum filter responses, and an IQ mismatch compensation filter filters the modified inphase signal with the IQ mismatch compensation filter response, to generate a filter compensated inphase signal.

公开(公告)号：US09383209B2

公开(公告)日：2016-07-05

申请号：US14034486

申请日：2013-09-23

Applicant: Texas Instruments Incorporated

Inventor： Sachin Bhardwaj ,  Sriram Murali ,  Jaiganesh Balakrishnan ,  Jayawardan Janardhanan ,  Yogesh Shekar ,  Goutam Dutta

IPC: G01C21/16 ,  G01C21/20

CPC classification number: G01C21/165 ,  G01C21/16 ,  G01C21/20

Abstract: According to an aspect of the present disclosure, the relative attitude between an inertial measurement unit (IMU), present on a mobile device, and the frame of reference of the vehicle carrying mobile device is estimated. The estimated relative attitude is used to translate the IMU measurement to the vehicle frame of reference to determine the velocity and position of the vehicle. As a result, the vehicle position and velocity are determined accurately in the event of undocking and re-docking of the mobile device from a docking system in the vehicle. The relative attitude is estimated in terms of pitch, roll, and yaw angles.

Abstract translation: 根据本公开的一个方面，估计出现在移动设备上的惯性测量单元（IMU）与携带移动设备的车辆的参考系之间的相对姿态。 估计的相对姿态用于将IMU测量值转换为车辆参考系，以确定车辆的速度和位置。 结果，在移动设备从车辆中的对接系统脱离和重新对接的情况下，准确地确定车辆位置和速度。 根据俯仰角，俯仰角和偏航角估计相对姿态。

公开(公告)号：US20150249907A1

公开(公告)日：2015-09-03

申请号：US14194449

申请日：2014-02-28

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Pankaj Gupta ,  Sthanunathan Ramakrishnan ,  Jaiganesh Balakrishnan ,  Sachin Bhardwaj

IPC: H04W4/04

CPC classification number: H04W4/043

Abstract: Several systems and methods for location estimation in a multi-floor environment are disclosed. In an embodiment, the method includes performing wireless scanning so as to receive wireless signals from one or more access points from among a plurality of access points positioned at plurality of locations, respectively at one or more floors from among a plurality of floors within the multi-floor environment. A first set of RSSI measurements is computed corresponding to the wireless signals. Absolute floor location information is determined based on the first set of RSSI measurements and a pre-defined objective function. The pre-defined objective function is configured to maximize a probability of a user being located at a floor so as to receive the wireless signals. A user floor location is determined based on the absolute floor location information. The user location is estimated at least in part based on the user floor location.

Abstract translation: 公开了用于多层环境中的位置估计的几种系统和方法。 在一个实施例中，该方法包括执行无线扫描，以便从位于多个接入点内的多个接入点中的多个接入点接收无线信号，所述多个接入点分别位于多个接入点内的多个接入点 - 地板环境。 对应于无线信号计算第一组RSSI测量。 基于第一组RSSI测量和预定义的目标函数来确定绝对楼层位置信息。 预定义的目标函数被配置为最大化用户位于楼层的概率以便接收无线信号。 基于绝对楼层位置信息确定用户楼层位置。 至少部分地基于用户楼层位置来估计用户位置。

公开(公告)号：US20140335809A1

公开(公告)日：2014-11-13

申请号：US14323241

申请日：2014-07-03

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Jaiganesh Balakrishnan

IPC: H04B1/10 ,  H04B17/00

CPC classification number: H04B1/12 ,  H04B1/10 ,  H04B1/1027 ,  H04B1/1646 ,  H04B17/20 ,  H04B17/318 ,  H04B17/336 ,  H04B2001/1054 ,  H04H40/72

Abstract: A wireless receiver (10) includes a down converter module (210) operable to deliver a signal having a signal bandwidth that changes over time, a dynamically controllable filter module (200) having a filter bandwidth and fed by said down converter module (210), and a measurement module (295) operable to at least approximately measure the signal bandwidth, said dynamically controllable filter module (200) responsive to said measurement module (295) to dynamically adjust the filter bandwidth to more nearly match the signal bandwidth as it changes over time, whereby output from said filter module (200) is noise-reduced. Other wireless receivers, electronic circuits, and processes for their operation are disclosed.

公开(公告)号：US20140005751A1

公开(公告)日：2014-01-02

申请号：US14019113

申请日：2013-09-05

Applicant: Texas Instruments Incorporated

Inventor： Sthanunathan Ramakrishnan ,  Jaiganesh Balakrishnan

IPC: A61N1/372

CPC classification number: A61N1/37252 ,  A61N1/08 ,  A61N1/37211

Abstract: By a medical implant transceiver implantable within a body of a living organism, a portion of a signal is received from a medical controller transceiver external to the body of the living organism. Based on directions within the portion of the signal, a time duration is determined, after which a subsequent portion of the signal is to be transmitted from the medical controller transceiver. The directions include a value indicative of the time duration. The time duration differs based on the value. The subsequent portion is to be transmitted from the medical controller transceiver after an end of the portion. The medical implant transceiver enters into an inactive state for the time duration and awakens after the time duration has elapsed.

Abstract translation: 通过可植入在活体内的医疗植入物收发器，信号的一部分从生物体的身体外部的医疗控制收发器接收。 基于信号部分内的方向，确定持续时间，之后从医疗控制收发器发送信号的后续部分。 方向包括指示持续时间的值。 持续时间根据值而不同。 在部分结束之后，将从医疗控制器收发器发送随后的部分。 医疗植入物收发器在持续时间内进入非活动状态，并在持续时间过去后唤醒。