作者: W. Huang , M. Nakagawa
DOI: 10.1109/ISSSTA.1994.379517
关键词:
摘要: 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 used present LD nonlinearity. In DS/CDMA systems, only one harmonic the term falls on signal frequency band and influences performance. average derived with information auto-correlation functions. results are useful for CDMA design performance analysis. With it necessary select optimal modulation index that provides a maximum carrier-to-noise ratio (CIN). effect frequency-division (FDMA) also compared. analytical method applicable other general nonlinearities systems. >