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A new TH/DS-CDMA scheme for UWB communication systems and its performance analysis

Shayesteh, M. G ; Sharif University of Technology | 2006

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  1. Type of Document: Article
  2. DOI: 10.1109/RWS.2006.1615116
  3. Publisher: 2006
  4. Abstract:
  5. We propose a new multiple access technique for Ultra Wide-Band (UWB) systems based on time-hopping (TH) and direct sequence (DS) spread spectrum techniques. In this method, the duration of each bit is divided into N s frames each one consisting of Nh chips. The outputs of a super-orthogonal encoder and a PN sequence specify the frame number, in which the data is transmitted in DS spread-spectrum form using the second PN sequence. We consider hard decision with threshold and soft decision before Viterbi decoding at the receiver. We evaluate the performance of the proposed method and compare it with the conventional DS-CDMA system. The results show that the proposed method has the best performance while it has the same bandwidth as the conventional DS-CDMA system. © 2006 IEEE
  6. Keywords:
  7. Bandwidth ; Channel capacity ; Decoding ; Signal receivers ; Telecommunication systems ; Soft decision ; Super-orthogonal codes ; Ultra wide-band (UWB) systems ; Viterbi decoding ; Code division multiple access
  8. Source: 2006 IEEE Radio and Wireless Symposium, San Diego, CA, 17 January 2006 through 19 January 2006 ; Volume 2006 , 2006 , Pages 147-150 ; 0780394127 (ISBN); 9780780394124 (ISBN)
  9. URL: https://ieeexplore.ieee.org/document/1615116