A QUASI-ORTHOGONAL CORRELATOR-BASED BPNN PN CODE ACQUISITION SCHEME FOR UNDERWATER ACOUSTIC DSSS COMMUNICATION

Authors

Jiang-Yao Chen, Department of Electrical Engineering, National Taiwan Ocean University, Keelung, Taiwan, R.O.C
Shao-Wei Leu, Department of Electrical Engineering, National Taiwan Ocean University, Keelung, Taiwan, R.O.CFollow
Chin-Fen Lin, Department of Electrical Engineering, National Taiwan Ocean University, Keelung, Taiwan, R.O.C
Shun-Hsyung Chang, Department of Microelectronics Engineering, National Kaohsiung Marine University, Kaohsiung City, Taiwan, R.O.C

Abstract

This paper proposes a quasi-orthogonal correlator-based back propagation neural network (BPNN) pseudo-noise (PN) code acquisition scheme for underwater acoustic direct sequence spread-spectrum (DSSS) communication. The main idea is to use short-length quasi-orthogonal correlators for coarse phase estimation and a BPNN based discriminator for fine phase calculation. When compared with other neuralnet based PN code acquisition schemes, the short quasiorthogonal correlators effectively locate possible phases of the received signal with high tolerance to interference and require no full-length correlation. These capabilities have been verified by extensive computer simulations and the results clearly show that the proposed scheme has the characteristics that are highly suitable for the implementation of underwater acoustic DSSS communication systems.

Recommended Citation

Chen, Jiang-Yao; Leu, Shao-Wei; Lin, Chin-Fen; and Chang, Shun-Hsyung (2012) "A QUASI-ORTHOGONAL CORRELATOR-BASED BPNN PN CODE ACQUISITION SCHEME FOR UNDERWATER ACOUSTIC DSSS COMMUNICATION," Journal of Marine Science and Technology: Vol. 20: Iss. 1, Article 7.
DOI: 10.51400/2709-6998.2422
Available at: https://jmstt.ntou.edu.tw/journal/vol20/iss1/7