Design of SIMO <italic>M</italic>-QAM System for Ultrasonic Communications on Shallow Waters
In this work, we present a transmission system that uses single-carrier modulation M-ary symbols quadrature amplitude modulation (M-QAM) for underwater acoustic communications (UAC) in the ultrasonic band. It exploits the diversity that four hydrophones provide at reception in a single-input multipl...
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| Language: | English |
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IEEE
2025-01-01
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| Series: | IEEE Open Journal of the Communications Society |
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| Online Access: | https://ieeexplore.ieee.org/document/11105458/ |
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| author | Unai Fernandez-Plazaola Francisco J. Canete Eduardo Martos-Naya Luis Diez |
| author_facet | Unai Fernandez-Plazaola Francisco J. Canete Eduardo Martos-Naya Luis Diez |
| author_sort | Unai Fernandez-Plazaola |
| collection | DOAJ |
| description | In this work, we present a transmission system that uses single-carrier modulation M-ary symbols quadrature amplitude modulation (M-QAM) for underwater acoustic communications (UAC) in the ultrasonic band. It exploits the diversity that four hydrophones provide at reception in a single-input multiple-output (SIMO) <inline-formula> <tex-math notation="LaTeX">$1\times 4$ </tex-math></inline-formula> configuration and also includes, for each stream, a phase-locked loop (PLL) for synchronization and a turbo-equalization subsystem, with fractionally-spaced equalizer (FSE) and decision feedback equalizer (DFE) filters, adaptive by means of least mean squares (LMS) algorithm, both of which are driven by an low-density parity check (LDPC) decoder decisions. The paper describes the system design and analyze its performances on trials carried out on shallow waters of the Mediterranean sea. Achievable data rates exceeding 200 kb/s between links of transmission distances longer than 200 m are obtained with a satisfactory low bit-error rate (BER). |
| format | Article |
| id | doaj-art-adec98c466f34005b6f2d786467ecd3e |
| institution | Kabale University |
| issn | 2644-125X |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Open Journal of the Communications Society |
| spelling | doaj-art-adec98c466f34005b6f2d786467ecd3e2025-08-22T23:17:24ZengIEEEIEEE Open Journal of the Communications Society2644-125X2025-01-0166323633510.1109/OJCOMS.2025.359448911105458Design of SIMO <italic>M</italic>-QAM System for Ultrasonic Communications on Shallow WatersUnai Fernandez-Plazaola0https://orcid.org/0000-0003-1321-3948Francisco J. Canete1https://orcid.org/0000-0002-4871-5609Eduardo Martos-Naya2https://orcid.org/0000-0001-6514-5057Luis Diez3https://orcid.org/0000-0002-0489-7893Communications and Signal Processing Lab, Telecommunication Research Institute, E.T.S.I. Telecomunicacion, Universidad de Malaga, Malaga, SpainCommunications and Signal Processing Lab, Telecommunication Research Institute, E.T.S.I. Telecomunicacion, Universidad de Malaga, Malaga, SpainCommunications and Signal Processing Lab, Telecommunication Research Institute, E.T.S.I. Telecomunicacion, Universidad de Malaga, Malaga, SpainCommunications and Signal Processing Lab, Telecommunication Research Institute, E.T.S.I. Telecomunicacion, Universidad de Malaga, Malaga, SpainIn this work, we present a transmission system that uses single-carrier modulation M-ary symbols quadrature amplitude modulation (M-QAM) for underwater acoustic communications (UAC) in the ultrasonic band. It exploits the diversity that four hydrophones provide at reception in a single-input multiple-output (SIMO) <inline-formula> <tex-math notation="LaTeX">$1\times 4$ </tex-math></inline-formula> configuration and also includes, for each stream, a phase-locked loop (PLL) for synchronization and a turbo-equalization subsystem, with fractionally-spaced equalizer (FSE) and decision feedback equalizer (DFE) filters, adaptive by means of least mean squares (LMS) algorithm, both of which are driven by an low-density parity check (LDPC) decoder decisions. The paper describes the system design and analyze its performances on trials carried out on shallow waters of the Mediterranean sea. Achievable data rates exceeding 200 kb/s between links of transmission distances longer than 200 m are obtained with a satisfactory low bit-error rate (BER).https://ieeexplore.ieee.org/document/11105458/Adaptive filterdiversityequalizationfading channelsLMSMIMO |
| spellingShingle | Unai Fernandez-Plazaola Francisco J. Canete Eduardo Martos-Naya Luis Diez Design of SIMO <italic>M</italic>-QAM System for Ultrasonic Communications on Shallow Waters IEEE Open Journal of the Communications Society Adaptive filter diversity equalization fading channels LMS MIMO |
| title | Design of SIMO <italic>M</italic>-QAM System for Ultrasonic Communications on Shallow Waters |
| title_full | Design of SIMO <italic>M</italic>-QAM System for Ultrasonic Communications on Shallow Waters |
| title_fullStr | Design of SIMO <italic>M</italic>-QAM System for Ultrasonic Communications on Shallow Waters |
| title_full_unstemmed | Design of SIMO <italic>M</italic>-QAM System for Ultrasonic Communications on Shallow Waters |
| title_short | Design of SIMO <italic>M</italic>-QAM System for Ultrasonic Communications on Shallow Waters |
| title_sort | design of simo italic m italic qam system for ultrasonic communications on shallow waters |
| topic | Adaptive filter diversity equalization fading channels LMS MIMO |
| url | https://ieeexplore.ieee.org/document/11105458/ |
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