A Super Wideband Optical FM Modulation Scheme for Video Transmission Systems

Kikushima, Koji; Yoshinaga, Hisao; Nakamoto, Hiroshi; Kishimoto, C.; Kawabe, M.; Suto, K.; Kumozaki, Kiyomi; Shibata, Nori

doi:10.1109/49.508278

Cited by 31 publications

(16 citation statements)

References 8 publications

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“…In the proposed method, the output SCM signal C prop the additive noise power N prop , and the IM7 power IMD 7 prop are given [19] by where Here Γ is the insertion loss of the optical chirp controller and A 7,M is the product of the IM7 falling in the central channel when the number of subcarriers is M. When the second and third nonlinearities of the chirp characteristic satisfy Eqs. (34) and (35) independently of the insertion loss, IM3 and IM5 are minimized simultaneously.…”

Section: Theoretical Analysis Of Received Signal Powermentioning

confidence: 99%

“…Radio signal transmission using FM has also been investigated in order to achieve higher quality radio transmission, because a higher CNR (carrier power to noise power ratio) is required to transmit video signals [6][7][8]. Reference 6 proposes a method in which LD is directly intensity-modulated by an electrical FM signal modulated by an SCM signal.…”

Section: Introductionmentioning

confidence: 99%

“…The radio-on-fiber (RoF) network with the features of broad bandwidth and low loss is one of the solutions [1][2][3][4][5]. Many methods of radio signal transmission have been investigated to realize high-quality radio signals transmission in RoF networks [6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

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Proposal of a nonlinear compensation scheme using an optical chirp controller in SCM/OFM RoF link

Murakoshi

Tsukamoto

Komaki

2006

Electron. Comm. Jpn. Pt. I

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SUMMARYAn SCM optical FM method can obtain an FM gain, so it is effective on employing an RoF link which transfers a broad-band or multicarrier RF signal. However, the RF signal quality is degraded by intermodulation distortions due to the nonlinearity of LDs and optical frequency discriminator. The nonlinear compensation technique in the RoF link has been investigated in order to obtain a higher RF signal quality. This paper proposes an insertion-type distortion nonlinear compensation. In the proposed scheme, a nonlinear device is inserted between transmitter and receiver and we propose an optical chirp controller as the nonlinear device. The proposed scheme suppresses the higher order intermodulation distortion which degrades RF signal quality in the adaptive transmittance control method.In this paper we theoretically analyze the SFDR of the optical FM method using the optical chirp controller and show that improvement in the SFDR at 9 and 5 dB compared to methods without nonlinear compensation and the adaptive transmittance control method, respectively, can be obtained.

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Section: Theoretical Analysis Of Received Signal Powermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Proposal of a nonlinear compensation scheme using an optical chirp controller in SCM/OFM RoF link

Murakoshi

Tsukamoto

Komaki

2006

Electron. Comm. Jpn. Pt. I

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show abstract

“…The intensity noise is converted to triangular noise during demodulation, which results in a serious problem, especially in higher-frequency bands. Taking account of these noise factors, the fundamental CNR characteristic is defined [2] by where ∆F is frequency deviation per channel of the FDM signal, B AM is its channel bandwidth, f AM is modulating frequency, m opt is optical modulation index of the FM signal, R is conversion efficiency of the APD, P r is optical received power on the APD, M is multiplication factor of the APD, B FM is FM transmission bandwidth, N _RIN is relative intensity noise (RIN) of the optical received signal, N _shot is shot noise, and N _thermal is thermal noise of the optical receiver.…”

Section: The Optical Super Wide-band Fm Techniquementioning

confidence: 99%

“…Optical super wide-band FM technique is an effective solution to these problems for multichannel video distribution [1][2][3][4][5][6]. In this technique, a set of multichannel FDM signals is converted into one wide-band FM signal, which is subjected to optical intensity modulation for optical transmission and distribution.…”

Section: Introductionmentioning

confidence: 99%

Modeling of CNR characteristics under bandwidth limitation on transmission systems employing optical super wide‐band FM technique

Fuse

Kudo

Ishii

et al. 2003

Electron. Comm. Jpn. Pt. I

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SUMMARYWith regards to an optical transmission system employing the optical super wide-band FM technique, which realizes multichannel video distribution on existing optical access networks, this paper examines the bandwidth limitation on the wide-band FM signal as a factor of CNR degradation theoretically and experimentally. The required bandwidth for an FM signal has been estimated by the Komai-Carson law, but there have been few studies of the quantitative relationship between that bandwidth and the amount of CNR degradation. To analyze such CNR degradation, we proposed a model for bandwidth limitation on the wide-band FM signal with the "equivalent noise pulse." The CNR theory on our proposed model can explain the actual CNR characteristics with bandwidth limitation. The results show that the bandwidth required is more than four times the standard deviation of the FM spectrum in order to maintain the CNR degradation of less than 1 dB.

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CNR characteristics of optical transmission systems employing super wide-band FM technique

Fuse¹,

Ishii

Kudo

et al. 2000

Electron. Comm. Jpn. Pt. I

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A Super Wideband Optical FM Modulation Scheme for Video Transmission Systems

Cited by 31 publications

References 8 publications

Proposal of a nonlinear compensation scheme using an optical chirp controller in SCM/OFM RoF link

Proposal of a nonlinear compensation scheme using an optical chirp controller in SCM/OFM RoF link

Modeling of CNR characteristics under bandwidth limitation on transmission systems employing optical super wide‐band FM technique

CNR characteristics of optical transmission systems employing super wide-band FM technique

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