Hadamard–Viterbi Joint Soft Decoding for MFSK Underwater Acoustic Communications
Multiple Frequency-Shift Keying (MFSK) has been used widely for underwater acoustic communications due to its low complexity and channel robustness. However, the traditional MFSK has the limitation of a low bit rate compared with coherent acoustic communication. To increase the bit rate, this study...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-11-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/14/23/6038 |
| _version_ | 1827642567441776640 |
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| author | Fei-Yun Wu Tian Tian Ben-Xue Su Yan-Chong Song |
| author_facet | Fei-Yun Wu Tian Tian Ben-Xue Su Yan-Chong Song |
| author_sort | Fei-Yun Wu |
| collection | DOAJ |
| description | Multiple Frequency-Shift Keying (MFSK) has been used widely for underwater acoustic communications due to its low complexity and channel robustness. However, the traditional MFSK has the limitation of a low bit rate compared with coherent acoustic communication. To increase the bit rate, this study designs a new MFSK with the concept of orthogonal frequency division multiplexing (OFDM). We also adopt a channel-concatenated coding to resist the multipath interference and design the iterative joint decoding. The channel-concatenated coding consists of a Hadamard code and a convolutional code. Correspondingly, the iterative joint decoding uses the Hadamard–Viterbi joint soft decoding framework with a newly designed branch metric, which uses the Hadamard structure. As an important preprocessing link for a received signal, frame synchronization and Doppler compensation are also described in detail in this study. Simulations and experiments are conducted to show the effectiveness of the proposed MFSK underwater acoustic communications. |
| first_indexed | 2024-03-09T17:34:03Z |
| format | Article |
| id | doaj.art-ab7204c7fd514c9d8028dafef5cf34d6 |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-09T17:34:03Z |
| publishDate | 2022-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-ab7204c7fd514c9d8028dafef5cf34d62023-11-24T12:04:41ZengMDPI AGRemote Sensing2072-42922022-11-011423603810.3390/rs14236038Hadamard–Viterbi Joint Soft Decoding for MFSK Underwater Acoustic CommunicationsFei-Yun Wu0Tian Tian1Ben-Xue Su2Yan-Chong Song3School of Marine Science and Technology, Northwestern Polytechnical University, Xi’an 710072, ChinaSchool of Marine Science and Technology, Northwestern Polytechnical University, Xi’an 710072, ChinaSchool of Marine Science and Technology, Northwestern Polytechnical University, Xi’an 710072, ChinaSchool of Marine Science and Technology, Northwestern Polytechnical University, Xi’an 710072, ChinaMultiple Frequency-Shift Keying (MFSK) has been used widely for underwater acoustic communications due to its low complexity and channel robustness. However, the traditional MFSK has the limitation of a low bit rate compared with coherent acoustic communication. To increase the bit rate, this study designs a new MFSK with the concept of orthogonal frequency division multiplexing (OFDM). We also adopt a channel-concatenated coding to resist the multipath interference and design the iterative joint decoding. The channel-concatenated coding consists of a Hadamard code and a convolutional code. Correspondingly, the iterative joint decoding uses the Hadamard–Viterbi joint soft decoding framework with a newly designed branch metric, which uses the Hadamard structure. As an important preprocessing link for a received signal, frame synchronization and Doppler compensation are also described in detail in this study. Simulations and experiments are conducted to show the effectiveness of the proposed MFSK underwater acoustic communications.https://www.mdpi.com/2072-4292/14/23/6038underwater acoustic communicationsmultipath spreadchannel-concatenated codingMFSK |
| spellingShingle | Fei-Yun Wu Tian Tian Ben-Xue Su Yan-Chong Song Hadamard–Viterbi Joint Soft Decoding for MFSK Underwater Acoustic Communications Remote Sensing underwater acoustic communications multipath spread channel-concatenated coding MFSK |
| title | Hadamard–Viterbi Joint Soft Decoding for MFSK Underwater Acoustic Communications |
| title_full | Hadamard–Viterbi Joint Soft Decoding for MFSK Underwater Acoustic Communications |
| title_fullStr | Hadamard–Viterbi Joint Soft Decoding for MFSK Underwater Acoustic Communications |
| title_full_unstemmed | Hadamard–Viterbi Joint Soft Decoding for MFSK Underwater Acoustic Communications |
| title_short | Hadamard–Viterbi Joint Soft Decoding for MFSK Underwater Acoustic Communications |
| title_sort | hadamard viterbi joint soft decoding for mfsk underwater acoustic communications |
| topic | underwater acoustic communications multipath spread channel-concatenated coding MFSK |
| url | https://www.mdpi.com/2072-4292/14/23/6038 |
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