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Oversaturating Synchronous CDMA Systems Using Collaborative Coding

Jarkko Paavola, Valery Ipatov, Oversaturating Synchronous CDMA Systems Using Collaborative Coding. In: Proceedings of the 15th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC '04), 2004.

Abstract:

Oversaturated synchronous CDMA system is proposed based on collaborative
coding, where data bits of group of L+s users are jointly one-to-one mapped
onto 2^{L+s} L-dimensional signal vectors. Instead of unique signature per
each user, L-dimensional signature subspace is used to transmit bits of
L+s users (s>0). All signature subspaces are orthogonal to each other which
simplifies optimal receiver structure. With signal space dimension N, the
number of users is K=N(1+s/L). Preferable collaborative codes are found
using the sphere packing theory for L=2,...,5, s=1,2. Trade-off between
oversaturation efficiency and energy loss/gain is evaluated against
conventional non-oversaturated orthogonal CDMA.

Files:

Abstract in PDF-format

BibTeX entry:

@INPROCEEDINGS{inpPaIp04a,
  title = {Oversaturating Synchronous CDMA Systems Using Collaborative Coding},
  booktitle = {Proceedings of the 15th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC '04)},
  author = {Paavola, Jarkko and Ipatov, Valery},
  year = {2004},
}

Belongs to TUCS Research Unit(s): Communication Systems (ComSys)

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