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Channel-Tolerant OFDM System for an Underwater Acoustic Channel

Xiang Li, Da-Jun Sun, Cuie Zheng

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Abstract

As is well known, the robust and reliable acoustic communication in adverse littoral water is a very challenging task. Orthogonal frequency division multiplexing (OFDM) is a promising technique for achieving high speed rate and combating multi-path fading in underwater acoustic communication. In this paper, the basic principle of OFDM system is firstly introduced. Then a channel estimation method based on pilot symbol assisted modulation (PSAM) is studied. Finally, the experiment results are presented to compare the channel estimation performance of three pilot patterns. It is concluded that the comb pilot pattern is not suitable for complex underwater acoustic channel.

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What this paper is about

As is well known, the robust and reliable acoustic communication in adverse littoral water is a very challenging task. Orthogonal frequency division multiplexing (OFDM) is a promising technique for achieving high speed rate and combating multi-path fading in underwater acoustic communication. In this paper, the basic principle of OFDM system is firstly introduced. Then a channel estimation method based on pilot symbol assisted modulation (PSAM) is studied. Finally, the experiment results are presented to compare the channel estimation performance of three pilot patterns. It is concluded that the comb pilot pattern is not suitable for complex underwater acoustic channel.

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Available abstract

As is well known, the robust and reliable acoustic communication in adverse littoral water is a very challenging task. Orthogonal frequency division multiplexing (OFDM) is a promising technique for achieving high speed rate and combating multi-path fading in underwater acoustic communication. In this paper, the basic principle of OFDM system is firstly introduced. Then a channel estimation method based on pilot symbol assisted modulation (PSAM) is studied. Finally, the experiment results are presented to compare the channel estimation performance of three pilot patterns. It is concluded that the comb pilot pattern is not suitable for complex underwater acoustic channel.

Key concepts: Orthogonal frequency-division multiplexing, Underwater acoustic communication, Channel (broadcasting), Computer science, Fading, Underwater, Electronic engineering, Underwater acoustics

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