公开(公告)号：US09977123B2

公开(公告)日：2018-05-22

申请号：US14699645

申请日：2015-04-29

Applicant: BAE Systems Information and Electronic Systems Integration Inc.

Inventor： Lingji Chen ,  Balasubramaniam Ravichandran

IPC: G01S13/86 ,  G01S7/04 ,  G01S13/72

CPC classification number: G01S13/867 ,  G01S7/04 ,  G01S13/723

Abstract: A system and method for projecting target tracks produced by a remote tracker onto a surface of the Earth to obtain projected tracks is provided. Projection bias in a projected track from the remote tracker projected onto a planar map is removed by computing a discrete Frechet distance from a polygonal curve associated with a track derived from the remote tracker to a corresponding polygonal curve on the planar map. A correspondence between the projected track and a track on the planar map is automatically established. A projection bias is removed based on the correspondence.

公开(公告)号：US10277247B1

公开(公告)日：2019-04-30

申请号：US15950913

申请日：2018-04-11

Applicant: BAE SYSTEMS Information and Electronic Systems Integration Inc.

Inventor： Peter M. Kingston ,  Lingji Chen ,  Eric N. Duchon ,  Christopher D. Moss

IPC: H03M7/30 ,  H03M7/40

Abstract: A receiver includes: a filter circuit to generate predicted measurements for a set of tracks based on previous kinematic states of the tracks and timing and source data of next compressed measurements associated to the tracks, generate probability data of differences between the predicted measurements and next measurement data, generate the next measurement data using the predicted measurements and quantized differences between the predicted measurements and the next measurement data, and generate next kinematic states of the tracks based on the previous kinematic states, the timing and source data of the next compressed measurements, and the generated measurement data; a quantizer circuit to quantize the probability data into quantization tables and look up the quantized differences from corresponding indices in the quantization tables; and a decoder circuit to decode encoded index data of the next compressed measurements into the corresponding indices in the quantization tables using the quantized probability data.

公开(公告)号：US20150338515A1

公开(公告)日：2015-11-26

申请号：US14699645

申请日：2015-04-29

Applicant: BAE Systems Information and Electronic Systems Integration Inc.

Inventor： Lingji Chen ,  Balasubramaniam Ravichandran

IPC: G01S13/86

CPC classification number: G01S13/867 ,  G01S7/04 ,  G01S13/723

Abstract: A system and method for projecting target tracks produced by a remote tracker onto a surface of the Earth to obtain projected tracks is provided. Projection bias in a projected track from the remote tracker projected onto a planar map is removed by computing a discrete Frechet distance from a polygonal curve associated with a track derived from the remote tracker to a corresponding polygonal curve on the planar map. A correspondence between the projected track and a track on the planar map is automatically established. A projection bias is removed based on the correspondence.

Abstract translation: 提供了一种用于将由远程跟踪器产生的目标轨迹投影到地球表面以获得投影轨道的系统和方法。 通过计算与从远程跟踪器导出的曲线相关联的多边形曲线到平面图上的相应多边形曲线的离散Frechet距离，可以消除投影到平面地图上的远程跟踪器的投影轨迹中的投影偏移。 自动建立投影轨道与平面地图上的轨道之间的对应关系。 基于对应关系去除投影偏差。