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Performance analysis of chip-asynchronous coherent time-spreading optical CDMA system

  • Optoelectronics Letters
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Abstract

Multiple-access interference(MAI) and beat noise(BN) in chip-asynchronous coherent time-spreading OCDMA system are evaluated by the aperiodic cross-correlation function of up-sampled sequence. Relationship between the mean intensity of aperiodic cross-correlation and MAI and BN is deduced, and then the relationship between BER and mean intensity of aperiodic cross-correlation is discussed. For 127-long gold sequence, mean BER performance of chip-asynchronous coherent time-spreading OCDMA is derived and compared with that of the chip-synchronous system. It can be shown that the chip-synchronous assumption provides a performance upper limit. For realistic asynchronous coherent time-spreading OCDMA system, BER will reduce by about one order of magnitude.

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Authors and Affiliations

  1. College of Information Engineering, Shenzhen University, Shenzhen, 518060, China

    Jian-hua Ji  (吉建华), Qing Wu  (吴青), Fang-ping Gong  (龚方平) & Ming Xu  (徐明)

Authors
  1. Jian-hua Ji  (吉建华)
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  2. Qing Wu  (吴青)
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  3. Fang-ping Gong  (龚方平)
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  4. Ming Xu  (徐明)
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Corresponding author

Correspondence to Jian-hua Ji  (吉建华).

Additional information

This work has been supported by the National Natural Science Foundation of China (No. 60772027)

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Ji, Jh., Wu, Q., Gong, Fp. et al. Performance analysis of chip-asynchronous coherent time-spreading optical CDMA system. Optoelectron. Lett. 5, 30–33 (2009). https://doi.org/10.1007/s11801-009-8100-4

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  • DOI: https://doi.org/10.1007/s11801-009-8100-4

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