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An OFDM Receiver with Frequency Domain Diversity Combined Impulsive Noise Canceller for Underwater Network.

Saotome R, Hai TM, Matsuda Y, Suzuki T, Wada T - ScientificWorldJournal (2015)

Bottom Line: The OFDM receiver utilizes 20-28 KHz ultrasonic channel and subcarrier spacing of 46.875 Hz (MODE3) and 93.750 Hz (MODE2) OFDM modulations.In addition, the paper shows Impulsive Noise distribution data measured at a fishing port in Okinawa and at a barge in Shizuoka prefectures and then proposed diversity OFDM transceivers architecture and experimental results are described.By the proposed Impulsive Noise Canceller, frame bit error rate has been decreased by 20-30%.

View Article: PubMed Central - PubMed

Affiliation: Department of Information Engineering, University of the Ryukyus, 1 Senbaru, Nishihara, Okinawa 903-0213, Japan.

ABSTRACT
In order to explore marine natural resources using remote robotic sensor or to enable rapid information exchange between ROV (remotely operated vehicles), AUV (autonomous underwater vehicle), divers, and ships, ultrasonic underwater communication systems are used. However, if the communication system is applied to rich living creature marine environment such as shallow sea, it suffers from generated Impulsive Noise so-called Shrimp Noise, which is randomly generated in time domain and seriously degrades communication performance in underwater acoustic network. With the purpose of supporting high performance underwater communication, a robust digital communication method for Impulsive Noise environments is necessary. In this paper, we propose OFDM ultrasonic communication system with diversity receiver. The main feature of the receiver is a newly proposed Frequency Domain Diversity Combined Impulsive Noise Canceller. The OFDM receiver utilizes 20-28 KHz ultrasonic channel and subcarrier spacing of 46.875 Hz (MODE3) and 93.750 Hz (MODE2) OFDM modulations. In addition, the paper shows Impulsive Noise distribution data measured at a fishing port in Okinawa and at a barge in Shizuoka prefectures and then proposed diversity OFDM transceivers architecture and experimental results are described. By the proposed Impulsive Noise Canceller, frame bit error rate has been decreased by 20-30%.

No MeSH data available.


(a) MODE3 BER comparison for 16QAM at Okinawa. (b) MODE2 BER comparison for 16QAM at Shizuoka.
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fig9: (a) MODE3 BER comparison for 16QAM at Okinawa. (b) MODE2 BER comparison for 16QAM at Shizuoka.

Mentions: Figures 9(a) and 9(b) are the OFDM symbol by symbol bit error rate (BER) comparisons between frequency domain Impulsive Noise cancellation ON and OFF for MODE3 16QAM modulation in Okinawa site and MODE2 16QAM in Shizuoka site, respectively. The solid line corresponds to freq.-IMP OFF and the dashed line corresponds to ON. Horizontal axis shows BER and vertical axis shows OFDM symbol number. According to the figures, the proposed Frequency Domain Diversity Combined Impulsive Noise Canceller effectively reduces symbol by symbol BER values.


An OFDM Receiver with Frequency Domain Diversity Combined Impulsive Noise Canceller for Underwater Network.

Saotome R, Hai TM, Matsuda Y, Suzuki T, Wada T - ScientificWorldJournal (2015)

(a) MODE3 BER comparison for 16QAM at Okinawa. (b) MODE2 BER comparison for 16QAM at Shizuoka.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4553320&req=5

fig9: (a) MODE3 BER comparison for 16QAM at Okinawa. (b) MODE2 BER comparison for 16QAM at Shizuoka.
Mentions: Figures 9(a) and 9(b) are the OFDM symbol by symbol bit error rate (BER) comparisons between frequency domain Impulsive Noise cancellation ON and OFF for MODE3 16QAM modulation in Okinawa site and MODE2 16QAM in Shizuoka site, respectively. The solid line corresponds to freq.-IMP OFF and the dashed line corresponds to ON. Horizontal axis shows BER and vertical axis shows OFDM symbol number. According to the figures, the proposed Frequency Domain Diversity Combined Impulsive Noise Canceller effectively reduces symbol by symbol BER values.

Bottom Line: The OFDM receiver utilizes 20-28 KHz ultrasonic channel and subcarrier spacing of 46.875 Hz (MODE3) and 93.750 Hz (MODE2) OFDM modulations.In addition, the paper shows Impulsive Noise distribution data measured at a fishing port in Okinawa and at a barge in Shizuoka prefectures and then proposed diversity OFDM transceivers architecture and experimental results are described.By the proposed Impulsive Noise Canceller, frame bit error rate has been decreased by 20-30%.

View Article: PubMed Central - PubMed

Affiliation: Department of Information Engineering, University of the Ryukyus, 1 Senbaru, Nishihara, Okinawa 903-0213, Japan.

ABSTRACT
In order to explore marine natural resources using remote robotic sensor or to enable rapid information exchange between ROV (remotely operated vehicles), AUV (autonomous underwater vehicle), divers, and ships, ultrasonic underwater communication systems are used. However, if the communication system is applied to rich living creature marine environment such as shallow sea, it suffers from generated Impulsive Noise so-called Shrimp Noise, which is randomly generated in time domain and seriously degrades communication performance in underwater acoustic network. With the purpose of supporting high performance underwater communication, a robust digital communication method for Impulsive Noise environments is necessary. In this paper, we propose OFDM ultrasonic communication system with diversity receiver. The main feature of the receiver is a newly proposed Frequency Domain Diversity Combined Impulsive Noise Canceller. The OFDM receiver utilizes 20-28 KHz ultrasonic channel and subcarrier spacing of 46.875 Hz (MODE3) and 93.750 Hz (MODE2) OFDM modulations. In addition, the paper shows Impulsive Noise distribution data measured at a fishing port in Okinawa and at a barge in Shizuoka prefectures and then proposed diversity OFDM transceivers architecture and experimental results are described. By the proposed Impulsive Noise Canceller, frame bit error rate has been decreased by 20-30%.

No MeSH data available.