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Performance of Carrier Frequency Offset Compensation using CAZAC Code in Time and Spatial Variant Underwater Acoustic Channel
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 Title & Authors
Performance of Carrier Frequency Offset Compensation using CAZAC Code in Time and Spatial Variant Underwater Acoustic Channel
Park, Jihyun; Bae, Minja; Kim, Jongju; Yoon, Jong Rak;
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In underwater acoustic multipath channel, a performance of underwater acoustic (UWA) communication systems is affected by dynamic variation of boundary and high temporal and spatial variability of the channel conditions. Time and spatial variations of UWA channel induce a carrier frequency offset (CFO) since a phase and a frequency of received signal mismatch with a transmitting signal. Therefore, a performance of a phase shift keying underwater acoustic communication system is degraded. In this study, we have analyzed a performance of CFO estimation and compensation using a phase code in time and spatial variation channel. A constant amplitude zero autocorrelation (CAZAC) signal is applied as a phase code signal and its performance is evaluated in water tank. The bit error rate of a quadrature phase shift keying (QPSK) system with a phase code is improved about 4 to 10 times better than that without a phase code.
Underwater multipath;carrier frequency offset;CAZAC(constant amplitude zero autocorrelation);underwater acoustic communication system;
 Cited by
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