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Research on code division multiple access based on chirp multi-carrier

Research on code division multiple access based on chirp multi-carrier
Research on code division multiple access based on chirp multi-carrier

Underwater acoustic (UWA) channels are characterized by narrow-band, time-varying, and strong multipath interference. At the same time, Doppler effect also has a significant impact in UWA communications due to low sound speed in water. Therefore, traditional wireless multiple access technology cannot be used directly underwater. However, by combining some existing technologies in underwater communications, the traditional multiple access method can be improved to enable underwater multiple access. In this paper, we introduced chirp signals as carriers, which is widely used in UWA communications. Combined with code division multiple access (CDMA) and orthogonal frequency division multiple access (OFDMA) techniques, a multi-carrier chirp signal based CDMA method is proposed, which improves the reliability and spectrum efficiency of underwater multiple access. The simulation results show that the proposed method has good Bit error rate (BER) performance. Further, the method is also able to achieve good BER performance under the influence of Doppler effect because chirp signals is capable of resisting Doppler effects.

CDMA, Chirp, Multiple access, Sub-carriers
IEEE
Jia, Zhenyu
3fa86e7c-c36e-490c-8d6b-dbdba7db6f7c
Yuan, Fei
6378b428-b74b-41f7-8588-3e9e4b21cc07
Chen, Keyu
1470005b-fc92-4b0b-afee-52e48ee1b3fb
Cheng, En
c9f2d73d-f62b-4b93-86fa-de318c7b340f
Li, Jianghui
9c589194-00fa-4d42-abaf-53a32789cc5e
Jia, Zhenyu
3fa86e7c-c36e-490c-8d6b-dbdba7db6f7c
Yuan, Fei
6378b428-b74b-41f7-8588-3e9e4b21cc07
Chen, Keyu
1470005b-fc92-4b0b-afee-52e48ee1b3fb
Cheng, En
c9f2d73d-f62b-4b93-86fa-de318c7b340f
Li, Jianghui
9c589194-00fa-4d42-abaf-53a32789cc5e

Jia, Zhenyu, Yuan, Fei, Chen, Keyu, Cheng, En and Li, Jianghui (2018) Research on code division multiple access based on chirp multi-carrier. In 2018 OCEANS - MTS/IEEE Kobe Techno-Oceans, OCEANS - Kobe 2018. IEEE. 6 pp . (doi:10.1109/OCEANSKOBE.2018.8559246).

Record type: Conference or Workshop Item (Paper)

Abstract

Underwater acoustic (UWA) channels are characterized by narrow-band, time-varying, and strong multipath interference. At the same time, Doppler effect also has a significant impact in UWA communications due to low sound speed in water. Therefore, traditional wireless multiple access technology cannot be used directly underwater. However, by combining some existing technologies in underwater communications, the traditional multiple access method can be improved to enable underwater multiple access. In this paper, we introduced chirp signals as carriers, which is widely used in UWA communications. Combined with code division multiple access (CDMA) and orthogonal frequency division multiple access (OFDMA) techniques, a multi-carrier chirp signal based CDMA method is proposed, which improves the reliability and spectrum efficiency of underwater multiple access. The simulation results show that the proposed method has good Bit error rate (BER) performance. Further, the method is also able to achieve good BER performance under the influence of Doppler effect because chirp signals is capable of resisting Doppler effects.

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Research on Code Division Multiple Access Based on Chirp Multi-Carrier
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More information

Accepted/In Press date: February 2018
Published date: 4 December 2018
Venue - Dates: 2018 OCEANS - MTS/IEEE Kobe Techno-Oceans, OCEANS - Kobe 2018, Japan, 2018-05-27 - 2018-05-30
Keywords: CDMA, Chirp, Multiple access, Sub-carriers

Identifiers

Local EPrints ID: 426310
URI: http://eprints.soton.ac.uk/id/eprint/426310
PURE UUID: 7e00dd7d-4804-4ce0-af69-0847c39ff0cb
ORCID for Jianghui Li: ORCID iD orcid.org/0000-0002-2956-5940

Catalogue record

Date deposited: 22 Nov 2018 17:30
Last modified: 07 Oct 2020 02:15

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