Systems Engineering and Electronics

Previous Articles     Next Articles

Space-division multiple access for CDMA multiuser underwater acoustic communications

Jingwei Yin1,2,*, Pengyu Du1,2, Guang Yang1,2, and Huanling Zhou1,2   

  1. 1. Acoustic Science and Technology Laboratory, Harbin Engineering University, Harbin 150001, China;
    2. College of Underwater Acoustic Engineering, Harbin Engineering University, Harbin 150001, China
  • Online:2015-12-25 Published:2010-01-03


Time reversal mirror (TRM) can use the physical characteristicsof the underwater acoustic (UWA) channel to focus onthe desired user in multi-user UWA communication. The activeaverage sound intensity (AASI) detector can estimate all azimuthsof users with the same frequency band at the same time in orderto achieve directional communication by vector combination.Space-division multiple access (SDMA) based on TRM combinedwith the AASI detector is proposed in this paper, which can makethe capacity of the code division multiple access (CDMA) UWAsystem significantly increase. The simulation and lake test resultsshow that the 7-user UWA multi-user system can achieve low biterror communication.