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Performance analysis of internally coded partial-band DS-CDMA system in multipath Rayleigh fading channel

Mirmohseni, M ; Sharif University of Technology | 2007

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  1. Type of Document: Article
  2. DOI: 10.1109/ICTMICC.2007.4448599
  3. Publisher: 2007
  4. Abstract:
  5. We evaluate the performance of the internally coded partial-band DS-CDMA scheme first introduced in [1], in a multipath Rayleigh fading channel. The scheme of [1] is based on frequency-hopping (FH) and direct-sequence (DS) spread spectrum techniques. The total bandwidth is divided into Ns subbands. The output of a super-orthogonal encoder and a pseudorandom (PN) sequence selects one subband, in which the user's data is sent in the form of DS-CDMA signal using the second PN sequence. We consider soft detection at the receiver front end. We obtain the upper and lower bounds on the bit error rate. For comparison, we also consider the conventional DS-CDMA system. It is shown that for the same spectral efficiency the proposed multiple access method outperforms significantly the conventional DS-CDMA system over the fading channel as well without requiring any extra bandwidth. ©2007 IEEE
  6. Keywords:
  7. Code division multiple access ; Dielectric relaxation ; Fading (radio) ; Fading channels ; Telecommunication systems ; Direct-sequence ; DS-CDMA ; DS-CDMA systems ; Frequency-hopping ; Frequency-hopping (FH) ; International conferences ; Malaysia ; Multipath fading ; Multipath Rayleigh fading channel ; Partial-band ; Partial-band DS-CDMA ; Performance analyses ; Rake receiver ; Spread-spectrum techniques ; Super-orthogonal codes ; UWB systems ; Rayleigh fading
  8. Source: 2007 IEEE International Conference on Telecommunications and Malaysia International Conference on Communications, ICT-MICC 2007, Penang, 14 May 2007 through 17 May 2007 ; February , 2007 , Pages 29-34 ; 1424410940 (ISBN); 9781424410941 (ISBN)
  9. URL: https://ieeexplore.ieee.org/document/4448599