公开(公告)号：US20210119622A1

公开(公告)日：2021-04-22

申请号：US17071302

申请日：2020-10-15

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Sriram MURALI ,  Jaiganesh BALAKRISHNAN ,  Ram Narayan KRISHNA NAMA MONY ,  Pooja SUNDAR

IPC: H03K5/1252 ,  G06F1/10 ,  G11C19/28 ,  H03K19/21 ,  G06F1/08 ,  H03K5/00

Abstract: A circuit includes a noise generator and a delay element. The output of the noise generator couples to the input of the delay element. The output of the delay element is coupled to a first input of a logic circuit, and the output of the noise generator is coupled to a second input of the logic circuit. The output of the logic circuit is coupled to a first control input of a waveform storage circuit. The waveform storage circuit is configured to produce a first digital waveform on its output responsive to a first logic state on the output of the logic circuit and to produce a second digital waveform on its output responsive to a second logic state on the output of the logic circuit. A sequencer has a sequencer output coupled to the second control input of the waveform storage circuit.

公开(公告)号：US20130116921A1

公开(公告)日：2013-05-09

申请号：US13668381

申请日：2012-11-05

Applicant: Texas Instruments Incorporated

Inventor： Sandeep KASARGOD ,  Sandeep RAO ,  Karthik RAMASUBRAMANIAN ,  Tarkesh PANDE ,  Sriram MURALI

IPC: G01S19/45 ,  G01S19/42 ,  G01C21/12

CPC classification number: G01C21/12 ,  G01C21/165 ,  G01S19/42 ,  G01S19/45

Abstract: A vehicle navigation system includes a GNSS position engine (GPE) that uses GNSS satellite measurements to compute a first position and velocity of a vehicle and a first quality metric associated with the position and velocity. The system also includes a dead reckoning engine (DRE) that operates parallel with the GPE that computes a second position and velocity and a second quality metric associated with the dead reckoning. The GPE is configured to use the second position and velocity to detect a set of outliers in an incoming GNSS measurement; use the second position and velocity as an initial estimate of its position and velocity for a particular time instant, which is then refined by GNSS measurements received at that particular time instant; and to replace the first position and velocity with the second position and velocity.

Abstract translation: 车辆导航系统包括使用GNSS卫星测量来计算车辆的第一位置和速度以及与位置和速度相关联的第一质量度量的GNSS位置引擎（GPE）。 该系统还包括与计算第二位置和速度的GPE并行运行的航位推算引擎（DRE），以及与推算相关联的第二质量度量。 GPE被配置为使用第二位置和速度来检测进入GNSS测量中的一组异常值; 使用第二位置和速度作为其在特定时间瞬间的位置和速度的初始估计，然后通过在该特定时刻接收的GNSS测量来改进; 并用第二位置和速度来替换第一位置和速度。