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Iterative DS-CDMA Anti-interference Technique Based on Interference Power Cognition

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Wireless Internet (WICON 2011)

Abstract

In the additive white Gaussian noise channel, an iterative anti-interference method based on interference power cognition is proposed, where the interference is broadband digital modulation signal and desired signal is direct sequence spread spectrum(SS) signal. The power ratio of SS signal and interference is detected by cognitive method, and threshold value is calculated meanwhile. After that, the order of iteration is chose based on power ratio and threshold, if the ratio is bigger than threshold, the SS signal is detected first, or vice versa. Result shows the BER performance is improved by using proposed method, the performance is improved from 4e-3 to 1e-4 by using the proposed method, when the spread gain is 63, the SNR is -5dB, and the SIR is -12dB.

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© 2012 ICST Institute for Computer Science, Social Informatics and Telecommunications Engineering

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Mo, T., Hao, Z., Tang, Y. (2012). Iterative DS-CDMA Anti-interference Technique Based on Interference Power Cognition. In: Ren, P., Zhang, C., Liu, X., Liu, P., Ci, S. (eds) Wireless Internet. WICON 2011. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, vol 98. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-30493-4_13

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  • DOI: https://doi.org/10.1007/978-3-642-30493-4_13

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-30492-7

  • Online ISBN: 978-3-642-30493-4

  • eBook Packages: Computer ScienceComputer Science (R0)

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