公开(公告)号：US20210011156A1

公开(公告)日：2021-01-14

申请号：US16507832

申请日：2019-07-10

Applicant: BAE Systems Information and Electronic Systems Integration Inc.

Inventor： Apurva N. Mody ,  David J. Couto ,  Prabahan Basu ,  Michael J. Shea

IPC: G01S17/10 ,  G01S7/52 ,  H04B10/556 ,  H04B1/69

Abstract: A multi-user system to simultaneously perform operations such as communication, RADAR, Light Detection and Ranging (LIDAR) and Relative Navigation (RELNAV). The techniques according to an embodiment includes generating a Fourier based orthogonal chirp sequence of length P, a prime number greater than the number of users targeted for communication. The orthogonal chirp sequence is based on an identifier, in the range of one to P−1, associated with one of the targeted users. The method further includes using the orthogonal chirp sequence to generate a spread user signal based on a message directed to the one targeted users. The method further includes generating a sequence of training pulses for insertion into the spread user signal to facilitate reception of the signal. The method further includes transmitting and receiving a reflection of the spread user signal from one of the targeted users, the reflection used to detect and range the user.

公开(公告)号：US11366227B2

公开(公告)日：2022-06-21

申请号：US16507832

申请日：2019-07-10

Applicant: BAE Systems Information and Electronic Systems Integration Inc.

Inventor： Apurva N. Mody ,  David J. Couto ,  Prabahan Basu ,  Michael J. Shea

IPC: H04J13/00 ,  G01S17/26 ,  H04B10/556 ,  H04B1/69 ,  G01S7/52

Abstract: A multi-user system to simultaneously perform operations such as communication, RADAR, Light Detection and Ranging (LIDAR) and Relative Navigation (RELNAV). The techniques according to an embodiment includes generating a Fourier based orthogonal chirp sequence of length P, a prime number greater than the number of users targeted for communication. The orthogonal chirp sequence is based on an identifier, in the range of one to P−1, associated with one of the targeted users. The method further includes using the orthogonal chirp sequence to generate a spread user signal based on a message directed to the one targeted users. The method further includes generating a sequence of training pulses for insertion into the spread user signal to facilitate reception of the signal. The method further includes transmitting and receiving a reflection of the spread user signal from one of the targeted users, the reflection used to detect and range the user.