公开(公告)号：US20170115400A1

公开(公告)日：2017-04-27

申请号：US14919710

申请日：2015-10-21

Applicant: Texas Instruments Incorporated

Inventor： Jasbir Singh Nayyar ,  Sreenath Narayanan Potty ,  Sunil Chomal

IPC: G01S19/30

CPC classification number: G01S19/30 ,  H04B1/70752

Abstract: A personal navigation device includes a correlator for processing GNNS signals from a constellation of satellites A signal is received from a navigation beacon containing a repeating code word, in which the code word includes a number N of samples corresponding to N phases, and in which reception of each code word occurs within a defined time period T. The sequence of N code samples is correlated with a known code word to determine a maximum value of correlation for a particular phase of the received signal. The correlation is performed using a correlator of size M, in which M is less than N, such that N/M=P complete correlations for a partial code phase are performed such that each correlation of a partial code phase is performed within a time period of approximately T/P. All P correlations of partial code phases are completed within time T.

公开(公告)号：US09356650B2

公开(公告)日：2016-05-31

申请号：US14561407

申请日：2014-12-05

Applicant: Texas Instruments Incorporated

Inventor： Sunil Chomal ,  Karthik Ramasubramanian ,  Jawaharlal Tangudu ,  Hemanth Mullur

IPC: H04B1/709 ,  H04B1/7075

CPC classification number: H04B1/709 ,  H04B1/7075 ,  H04B2201/70715

Abstract: An integrated circuit for facilitating spread spectrum reception of data having a data bit period includes an hypothesis search circuit (120, 210, 220) operable to correlate a pseudorandom code with a signal input based on a received signal to produce correlation results, and a processor circuit (320) operable to coherently integrate the correlation results over plural sample windows (PreD1, PreD2) staggered relative to each other in the coherent integration interval and to non-coherently combine the coherently integrated results corresponding to the plural sample windows (PreD1, PreD2) to produce a received signal output, whereby enhancing performance. Other circuits, receivers and processes are also disclosed.

公开(公告)号：US11598883B2

公开(公告)日：2023-03-07

申请号：US17028729

申请日：2020-09-22

Applicant: Texas Instruments Incorporated

Inventor： Jasbir Singh Nayyar ,  Sreenath Narayanan Potty ,  Sunil Chomal

IPC: G01S19/30 ,  H04B1/7075

Abstract: A personal navigation device includes a correlator for processing GNSS signals from a constellation of satellites A signal is received from a navigation beacon containing a repeating code word, in which the code word includes a number N of samples corresponding to N phases, and in which reception of each code word occurs within a defined time period T. The sequence of N code samples is correlated with a known code word to determine a maximum value of correlation for a particular phase of the received signal. The correlation is performed using a correlator of size M, in which M is less than N, such that N/M=P complete correlations for a partial code phase are performed such that each correlation of a partial code phase is performed within a time period of approximately T/P. All P correlations of partial code phases are completed within time T.

公开(公告)号：US20200367830A1

公开(公告)日：2020-11-26

申请号：US16989032

申请日：2020-08-10

Applicant: Texas Instruments Incorporated

Inventor： Sarma Sundareswara Gunturi ,  Sunil Chomal

IPC: A61B5/00 ,  A61B5/024

Abstract: The disclosure provides a heart rate monitor (HRM) circuit. The HRM circuit includes an analog front end (AFE). The AFE receives a Photoplethysmographic (PPG) signal, and generates a fine PPG signal. A motion cancellation circuit is coupled to the AFE, and receives the fine PPG signal and an accelerometer signal. The motion cancellation circuit subtracts the accelerometer signal from the fine PPG signal to generate a coarse heart rate. A peak detector is coupled to the motion cancellation circuit and the AFE, and generates an instantaneous heart rate. A filter is coupled to the peak detector, and generates an estimated heart rate from the instantaneous heart rate, the estimated heart rate is provided as a feedback to the peak detector.

公开(公告)号：US10736575B2

公开(公告)日：2020-08-11

申请号：US16166195

申请日：2018-10-22

Applicant: Texas Instruments Incorporated

Inventor： Sarma Sundareswara Gunturi ,  Sunil Chomal

IPC: A61B5/00 ,  A61B5/024

Abstract: The disclosure provides a heart rate monitor (HRM) circuit. The HRM circuit includes an analog front end (AFE). The AFE receives a Photoplethysmographic (PPG) signal, and generates a fine PPG signal. A motion cancellation circuit is coupled to the AFE, and receives the fine PPG signal and an accelerometer signal. The motion cancellation circuit subtracts the accelerometer signal from the fine PPG signal to generate a coarse heart rate. A peak detector is coupled to the motion cancellation circuit and the AFE, and generates an instantaneous heart rate. A filter is coupled to the peak detector, and generates an estimated heart rate from the instantaneous heart rate, the estimated heart rate is provided as a feedback to the peak detector.

公开(公告)号：US10123746B2

公开(公告)日：2018-11-13

申请号：US15147720

申请日：2016-05-05

Applicant: Texas Instruments Incorporated

Inventor： Sarma Sundareswara Gunturi ,  Sunil Chomal

IPC: A61B5/00 ,  A61B5/024

Abstract: The disclosure provides a heart rate monitor (HRM) circuit. The HRM circuit includes an analog front end (AFE). The AFE receives a Photoplethysmographic (PPG) signal, and generates a fine PPG signal. A motion cancellation circuit is coupled to the AFE, and receives the fine PPG signal and an accelerometer signal. The motion cancellation circuit subtracts the accelerometer signal from the fine PPG signal to generate a coarse heart rate. A peak detector is coupled to the motion cancellation circuit and the AFE, and generates an instantaneous heart rate. A filter is coupled to the peak detector, and generates an estimated heart rate from the instantaneous heart rate, the estimated heart rate is provided as a feedback to the peak detector.

公开(公告)号：US11744520B2

公开(公告)日：2023-09-05

申请号：US16989032

申请日：2020-08-10

Applicant: Texas Instruments Incorporated

Inventor： Sarma Sundareswara Gunturi ,  Sunil Chomal

IPC: A61B5/00 ,  A61B5/024

CPC classification number: A61B5/721 ,  A61B5/02416 ,  A61B5/7278 ,  A61B5/725 ,  A61B5/7257 ,  A61B2562/0219

Abstract: The disclosure provides a heart rate monitor (HRM) circuit. The HRM circuit includes an analog front end (AFE). The AFE receives a Photoplethysmographic (PPG) signal, and generates a fine PPG signal. A motion cancellation circuit is coupled to the AFE, and receives the fine PPG signal and an accelerometer signal. The motion cancellation circuit subtracts the accelerometer signal from the fine PPG signal to generate a coarse heart rate. A peak detector is coupled to the motion cancellation circuit and the AFE, and generates an instantaneous heart rate. A filter is coupled to the peak detector, and generates an estimated heart rate from the instantaneous heart rate, the estimated heart rate is provided as a feedback to the peak detector.

公开(公告)号：US10816673B2

公开(公告)日：2020-10-27

申请号：US14919710

申请日：2015-10-21

Applicant: Texas Instruments Incorporated

Inventor： Jasbir Singh Nayyar ,  Sreenath Narayanan Potty ,  Sunil Chomal

IPC: G01S19/30 ,  H04B1/7075

Abstract: A personal navigation device includes a correlator for processing GNSS signals from a constellation of satellites A signal is received from a navigation beacon containing a repeating code word, in which the code word includes a number N of samples corresponding to N phases, and in which reception of each code word occurs within a defined time period T. The sequence of N code samples is correlated with a known code word to determine a maximum value of correlation for a particular phase of the received signal. The correlation is performed using a correlator of size M, in which M is less than N, such that N/M=P complete correlations for a partial code phase are performed such that each correlation of a partial code phase is performed within a time period of approximately T/P. All P correlations of partial code phases are completed within time T.

公开(公告)号：US20190053763A1

公开(公告)日：2019-02-21

申请号：US16166195

申请日：2018-10-22

Applicant: Texas Instruments Incorporated

Inventor： Sarma Sundareswara Gunturi ,  Sunil Chomal

IPC: A61B5/00 ,  A61B5/024

CPC classification number: A61B5/721 ,  A61B5/02416 ,  A61B5/725 ,  A61B5/7257 ,  A61B5/7278 ,  A61B2562/0219

Abstract: The disclosure provides a heart rate monitor (HRM) circuit. The HRM circuit includes an analog front end (AFE). The AFE receives a Photoplethysmographic (PPG) signal, and generates a fine PPG signal. A motion cancellation circuit is coupled to the AFE, and receives the fine PPG signal and an accelerometer signal. The motion cancellation circuit subtracts the accelerometer signal from the fine PPG signal to generate a coarse heart rate. A peak detector is coupled to the motion cancellation circuit and the AFE, and generates an instantaneous heart rate. A filter is coupled to the peak detector, and generates an estimated heart rate from the instantaneous heart rate, the estimated heart rate is provided as a feedback to the peak detector.

公开(公告)号：US20150085901A1

公开(公告)日：2015-03-26

申请号：US14561407

申请日：2014-12-05

Applicant: Texas Instruments Incorporated

Inventor： Sunil Chomal ,  Karthik Ramasubramanian ,  Jawaharlal Tangudu ,  Hemanth Mullur

IPC: H04B1/709

CPC classification number: H04B1/709 ,  H04B1/7075 ,  H04B2201/70715

Abstract: An integrated circuit for facilitating spread spectrum reception of data having a data bit period includes an hypothesis search circuit (120, 210, 220) operable to correlate a pseudorandom code with a signal input based on a received signal to produce correlation results, and a processor circuit (320) operable to coherently integrate the correlation results over plural sample windows (PreD1, PreD2) staggered relative to each other in the coherent integration interval and to non-coherently combine the coherently integrated results corresponding to the plural sample windows (PreD1, PreD2) to produce a received signal output, whereby enhancing performance. Other circuits, receivers and processes are also disclosed.

Abstract translation: 一种用于促进具有数据位周期的数据的扩频接收的集成电路包括可操作以将伪随机码与基于接收信号输入的信号相关联以产生相关结果的假设检索电路（120,210,220），以及处理器 电路（320）可操作以将相关结果相干地整合在相干积分间隔中相对于彼此交错的多个样本窗口（PreD1，PreD2），并且非相干地组合对应于多个样本窗口的相干整合结果（PreD1，PreD2 ）以产生接收信号输出，从而提高性能。 还公开了其他电路，接收器和处理。