Loading...

Performance of three-level spectrally encoded spread-time CDMA in the presence of multiple interferences

Mashhadi, S ; Sharif University of Technology | 2011

661 Viewed
  1. Type of Document: Article
  2. DOI: 10.1049/iet-com.2010.0301
  3. Publisher: 2011
  4. Abstract:
  5. In this study the authors present an in-depth study, analysis and discussion on maximum likelihood (ML)-based receiver for a typical spectrally encoded spread-time CDMA in the presence of multiple narrowband interference (NBI) signals in an additive white Gaussian noise channel. Furthermore, the authors demonstrate that by combining useful properties of ML-based receiver and three-level codes, that is, codes with values of -1, 0, +1, the authors can introduce a new strategy in which superior performance with respect to previous receiver structure based on two-level codes, that is, codes with values of -1, +1, can be attained. With the help of an example, the authors drive, first, the required signal-to-noise+interference power ratio (SNR) in a multiple access communication environment with multiple NBIs and, second, SNR attenuating parameter owing to multiple NBIs for two- and three-level codes. Finally, the authors relate the above parameters to a number of simple descriptive factors such as bit error rate. The results are validated by an extensive simulation on the aforementioned system
  6. Keywords:
  7. Additive white Gaussian noise channel ; Extensive simulations ; In-depth study ; Interference power ; Multiple access communications ; Multiple interferences ; Narrow band interference ; New strategy ; Receiver structure ; Signal to noise ; Spread-time ; Three-level ; Useful properties ; Bit error rate ; Gaussian noise (electronic) ; Maximum likelihood estimation ; Multiple access interference ; White noise ; Code division multiple access
  8. Source: IET Communications ; Volume 5, Issue 10 , 2011 , Pages 1328-1335 ; 17518628 (ISSN)
  9. URL: http://ieeexplore.ieee.org/xpl/abstractAuthors.jsp?tp=&arnumber=5960414&url=http%3A%2F%2Fieeexplore.ieee.org%2Fxpls%2Fabs_all.jsp%3Farnumber%3D5960414