Communication performance analysis according to seasons in Yellow Sea

• Published in: The Journal of the Acoustical Society of America 2011-04, Vol.129 (4_Supplement), p.2667-2667
• Main Authors: Kim, Juho, Bok, Tae-Hoon, Lee, Chong-Hyuen, Paeng, Dong-Guk, Bae, Jin-Ho, Kim, Seongil
• Format: Article
• Language: English
• ISSN: 0001-4966; 1520-8524
• DOI: 10.1121/1.3588927

Communication environments vary with time in the context of underwater channel because multipaths are affected by the sound speed profile (SSP) in the ocean. In this paper, the average SSPs for 10 years (2000–2009) were calculated in the Yellow Sea so that the eigen-ray paths with the channel impulse responses were determined. The computer simulation was conducted to compare the performance of underwater communication near the surface according to the variation of season. The performance of underwater communication was analyzed using the BPSK modulation and time reversal method. The significant differences of bit error rate (BER) were shown according to the change of season. In many cases, the received signals were distorted by the multi-path channel whose features are frequency selected fading. The time reversal method was applied to compare the BER without frequency selected effect. It turns out that the good performance was shown in the autumn because of the direct path through the mixed layer channel which made the multi-path effects relatively weaker. [Work supported by UD100014DD.]