公开(公告)号：US20230239002A1

公开(公告)日：2023-07-27

申请号：US18009338

申请日：2020-10-30

Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGY

Inventor： Hua YU ,  Yaqi ZHANG ,  Fei JI ,  Fangjiong CHEN

IPC: H04B1/69

CPC classification number: H04B1/69 ,  H04B13/02

Abstract: The present invention discloses is a multi-band hyperbolic frequency modulation spread spectrum communication method based on cross sub-band division. In the present solution, multi-band division of different sub-band quantities is performed on an available bandwidth of an underwater acoustic system according to the parity of the serial number of the current spread spectrum period to achieve the aim of cross sub-band division. On this basis, a plurality of divided sub-bands are grouped in pairs; for each group, sub-band selection is performed according to different transmitted data by using a sub-band selection and activation method to realize multi-band parallel transmission. Meanwhile, in each spread spectrum period, an activated sub-band performs frequency modulation on a modulated signal by using rising and falling hyperbolic frequency modulation signals respectively.