On the performance of a novel quasi-synchronous trellis-coded CDMA system Academic Article uri icon


  • We introduce a novel signal set defined over a signal space that consists of L (L 2) orthogonal planes, and a quasi-synchronous trellis-coded code-division multiple-access (TC-CDMA) system based on it. The proposed scheme makes efficient use of the available processing gain to improve power and/or bandwidth efficiency for practical multiuser interference environments. Having a multiplanar signal constellation structure, the proposed scheme provides several options for a given required data rate, which makes it better adapted to dynamic channel conditions. Analytical bounds and simulation results indicate that at practical error rates and 2 b/s/Hz the proposed scheme is approximately 1.2 dB better than a TC-CDMA system based on 8-PSK, and 3 dB better at 3 b/s/Hz compared to TC-CDMA using 16-QAM. Additionally, the proposed system is approximately 1 dB better than a multicoded system using two signature sequences per user.

published proceedings

  • IEEE Transactions on Communications

author list (cited authors)

  • Choe, S., & Georghiades, C. N.

citation count

  • 10

complete list of authors

  • Choe, Sangho||Georghiades, CN

publication date

  • December 2002