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Half-spectrum OFDM to quadruple the spectral efficiency of underwater wireless optical communication with digital power division multiplexing

Wang, Yuan (författare)
Zhejiang Univ, Natl Engn Res Ctr Opt Instruments, State Key Lab Modern Opt Instrumentat, Coll Opt Sci & Engn,Ningbo Innovat Ctr, Ningbo, Zhejiang, Peoples R China.
Zhang, Tianyi (författare)
Zhejiang Univ, Natl Engn Res Ctr Opt Instruments, State Key Lab Modern Opt Instrumentat, Coll Opt Sci & Engn,Ningbo Innovat Ctr, Ningbo, Zhejiang, Peoples R China.
Fei, Chao (författare)
Zhejiang Univ, Natl Engn Res Ctr Opt Instruments, State Key Lab Modern Opt Instrumentat, Coll Opt Sci & Engn,Ningbo Innovat Ctr, Ningbo, Zhejiang, Peoples R China.;Zhejiang Univ, NingboTech Univ, Sch Informat Sci & Engn, Ningbo, Zhejiang, Peoples R China.
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Tian, Jiahan (författare)
Zhejiang Univ, Natl Engn Res Ctr Opt Instruments, State Key Lab Modern Opt Instrumentat, Coll Opt Sci & Engn,Ningbo Innovat Ctr, Ningbo, Zhejiang, Peoples R China.
Zhang, Junwei (författare)
Hong Kong Polytech Univ, Photon Res Inst, Dept Elect & Informat Engn, Hong Kong, Peoples R China.
Xie, Yitong (författare)
Zhejiang Univ, Natl Engn Res Ctr Opt Instruments, State Key Lab Modern Opt Instrumentat, Coll Opt Sci & Engn,Ningbo Innovat Ctr, Ningbo, Zhejiang, Peoples R China.
Zhang, Fei (författare)
Zhejiang Univ, Natl Engn Res Ctr Opt Instruments, State Key Lab Modern Opt Instrumentat, Coll Opt Sci & Engn,Ningbo Innovat Ctr, Ningbo, Zhejiang, Peoples R China.
Du, Ji (författare)
Zhejiang Univ, Natl Engn Res Ctr Opt Instruments, State Key Lab Modern Opt Instrumentat, Coll Opt Sci & Engn,Ningbo Innovat Ctr, Ningbo, Zhejiang, Peoples R China.
Zhang, Guowu (författare)
Zhejiang Univ, Natl Engn Res Ctr Opt Instruments, State Key Lab Modern Opt Instrumentat, Coll Opt Sci & Engn,Ningbo Innovat Ctr, Ningbo, Zhejiang, Peoples R China.
Wang, Gaoxuan (författare)
Zhejiang Univ, Natl Engn Res Ctr Opt Instruments, State Key Lab Modern Opt Instrumentat, Coll Opt Sci & Engn,Ningbo Innovat Ctr, Ningbo, Zhejiang, Peoples R China.;Zhejiang Univ, NingboTech Univ, Sch Informat Sci & Engn, Ningbo, Zhejiang, Peoples R China.
Hong, Xiaojian (författare)
Zhejiang Univ, Natl Engn Res Ctr Opt Instruments, State Key Lab Modern Opt Instrumentat, Coll Opt Sci & Engn,Ningbo Innovat Ctr, Ningbo, Zhejiang, Peoples R China.;Zhejiang Univ, NingboTech Univ, Sch Informat Sci & Engn, Ningbo, Zhejiang, Peoples R China.
He, Sailing (författare)
KTH,Elektromagnetism och fusionsfysik,Zhejiang Univ, Natl Engn Res Ctr Opt Instruments, State Key Lab Modern Opt Instrumentat, Coll Opt Sci & Engn,Ningbo Innovat Ctr, Ningbo, Zhejiang, Peoples R China
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Zhejiang Univ, Natl Engn Res Ctr Opt Instruments, State Key Lab Modern Opt Instrumentat, Coll Opt Sci & Engn,Ningbo Innovat Ctr, Ningbo, Zhejiang, Peoples R China Zhejiang Univ, Natl Engn Res Ctr Opt Instruments, State Key Lab Modern Opt Instrumentat, Coll Opt Sci & Engn,Ningbo Innovat Ctr, Ningbo, Zhejiang, Peoples R China.;Zhejiang Univ, NingboTech Univ, Sch Informat Sci & Engn, Ningbo, Zhejiang, Peoples R China. (creator_code:org_t)
Optica Publishing Group, 2024
2024
Engelska.
Ingår i: Applied Optics. - : Optica Publishing Group. - 1559-128X .- 2155-3165. ; 63:9, s. 2352-2361
Relaterad länk:
https://urn.kb.se/re...
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https://doi.org/10.1...
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  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
Stäng  
  • Improving the spectrum efficiency (SE) is an effective method to further enhance the data rate of bandwidthmultiplexing (NOFDM) with a compression factor of 0.5 can save half of the bandwidth without introducing any inter-carrier-interference (ICI) only if the total number of subcarriers is large enough, and we termed it as half-spectrum OFDM (HS-OFDM). To the best of our knowledge, this is the first reported work on a closed-form HS-OFDM signal in the discrete domain from the perspective of a correlation matrix. Due to the special mathematical property, no extra complex decoding algorithm is required at the HS-OFDM receiver, making it as simple as the conventional OFDM receiver. Compared with traditional OFDM, HS-OFDM can realize the same data rate, but with a larger signal-to-noise ratio (SNR) margin. To fully use the SNR resource of the communication system, we further propose a digital power division multiplexed HS-OFDM (DPDM-HS-OFDM) scheme to quadruple the SE of conventional OFDM for the bandwidth-starved UWOCs. The experimental results show that HS-OFDM can improve the receiver sensitivity by around 4 dB as opposed to conventional 4QAM-OFDM with the same data rate and SE. With the help of the DPDM-HS-OFDM scheme, the data rate of multi-user UWOC can reach up to 4.5 Gbps under the hard-decision forward error correction (HD-FEC) limit of a bit error rate (BER) of 3.8 x 10-3. Although there is some performance degradation in comparison with single-user HS-OFDM, the BER performance of multi-user DPDM-HS-OFDM is still superior to that of conventional single-user 4QAM-OFDM. Both single-user HS-OFDM and multi-user DPDM-HS-OFDM successfully achieve 2 Gbps/75 m data transmission, indicating that the DPDM-HS-OFDM scheme is of great importance in bandwidth-limited UWOC systems and has guiding significance to underwater wireless optical multiple access.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik -- Telekommunikation (hsv//swe)
ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering -- Telecommunications (hsv//eng)

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