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Multiple jammer cancelation in spectrally-encoded spread-time asynchronous CDMA system: Matched & partially-matched schemes

Akhoondi, F ; Sharif University of Technology | 2012

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  1. Type of Document: Article
  2. DOI: 10.1109/ICTEL.2012.6221319
  3. Publisher: IEEE , 2012
  4. Abstract:
  5. In this paper, we study and analyze the performance of matched and partially-matched receivers for a typical ultra wide-band Spectrally-Encoded Spread-Time (SE/ST) CDMA in the presence of multiple tone jammers. We investigate a scenario where there is no information about the jammer frequencies in the transmitter side while it is desirable to cancel it in the receiver side. We will demonstrate the performance of the SE/ST system would be improved through partially matched filter at the receiver. In addition, we approximate the two-dimensional RAKE receiver by a simple one-dimensional RAKE for the scenario where there are K asynchronous users. Furthermore, closed form formula for the characteristic function of the decision variable will be found and used to evaluate the probability of error. Our numerical results show that the partially-matched receiver outperforms the conventional matched filter in case of high jammer to signal power ratio
  6. Keywords:
  7. Matched and partially-matched detection ; Multiple tone jammers ; Spectrally-Encoded Spread-Time (SE/ST) ; Two-dimensional RAKE receiver ; CDMA system ; Characteristic functions ; Closed-form formulae ; Conventional matched filter ; Decision variables ; Jammer to signals ; Jammers ; Numerical results ; Probability of errors ; RAKE receiver ; Spread-time ; Fading channels ; Jamming ; Signal receivers ; Two dimensional ; Information technology
  8. Source: 2012 19th International Conference on Telecommunications, ICT 2012, 23 April 2012 through 25 April 2012, Jounieh ; 2012 ; 9781467307475 (ISBN)
  9. URL: http://ieeexplore.ieee.org/xpl/login.jsp?tp=&arnumber=6221319&url=http%3A%2F%2Fieeexplore.ieee.org%2Fxpls%2Fabs_all.jsp%3Farnumber%3D6221319