Nonlinear Effect of Direct-Sequence CDMA in Optical Transmission
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概要
- 論文の詳細を見る
The intermodulation distortion (IMD) due to laser diode (LD) nonlinearity of an asynchronous direct-sequence code division multiple access (DS/CDMA) system in optical transmission is analyzed. A third-order polynomial without memory is used to present LD nonlinearity. In DS/CDMA systems, only one harmonic of the third-order intermodulation term falls on the signal frequency band and influences the system performance. The average distortion is derived with only the information of autocorrelation functions. The results are useful for CDMA system design and performance analysis. With LD nonlinearity it is necessary to select an optimal modulation index that provides a maximum signal-to-noise ratio (SNR). The analytical method is applicable to other general nonlinearities in CDMA systems.
- 社団法人電子情報通信学会の論文
- 1995-05-25
著者
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Nakagawa Masao
Faculty Of Science And Technology Keio University
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Huang Wei
Faculty Of Engineering Keio University
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Nakagawa Masao
Faculty Of Engineering Keio University
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Nakagawa Masao
Faculty Of Agriculture The University Of Tokyo
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