Real Time Implementation of Frost Beamformer for Underwater Communications

Authors

Hsien-Sen Hung, Associate Professor, Department of Electrical Engineering, National Taiwan Ocean University, 2 Pei-Ning Rd., Keelung, Taiwan, R.O.CFollow
Shun-Hsyung Chang, Professor, Department of Electrical Engineering, National Taiwan Ocean University, 2 Pei-Ning Rd., Keelung, Taiwan, R.O.C
Suan-Lin Chen, Graduate Student, Department of Electrical Engineering, National Taiwan Ocean University, 2 Pei-Ning Rd., Keelung, Taiwan, R.O.C.
Chi-Wen Chang, Graduate Student, Department of Electrical Engineering, National Taiwan Ocean University, 2 Pei-Ning Rd., Keelung, Taiwan, R.O.C.

Abstract

In this paper, we investigate the performance of Frost’s linearly constrained minimum variance (LCMV) adaptive beamformer via computer simulations for QPSK signals transmitted over Rayleigh and Rician fading channels. Simulation results show that the Frost beamformer can still improve the signal-to-interference-plus-noise ratio, even over fading channels. For real-time underwater communications, a prototype system is implemented, which uses TMS320C40 digital signal processor chip for realization of the Frost beamformer. Through experiments in an acoustic trough the validity of the real-time Frost beamformer prototype system is verified, and the feasibility of its use in underwater communications is assessed.

Recommended Citation

Hung, Hsien-Sen; Chang, Shun-Hsyung; Chen, Suan-Lin; and Chang, Chi-Wen (2009) "Real Time Implementation of Frost Beamformer for Underwater Communications," Journal of Marine Science and Technology: Vol. 7: Iss. 1, Article 1.
DOI: 10.51400/2709-6998.2506
Available at: https://jmstt.ntou.edu.tw/journal/vol7/iss1/1