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Oversaturated Group Orthogonal CDMA in Multipath Channels Using Chip Interleaving with Zero Padding

Alexey Dudkov, Jarkko Paavola, Valery Ipatov, Oversaturated Group Orthogonal CDMA in Multipath Channels Using Chip Interleaving with Zero Padding. In: Proceedings of the 18th Annual IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC'07), 2007.

Abstract:

Oversaturated group orthogonal CDMA (GO-CDMA) offers an elegant way of increasing capacity of synchronous DS CDMA, which allows existence of number of users exceeding signal space dimension. The system provides excellent results in synchronous single-path channels; however, in multipath channels complicated equalizers of big length are required to secure good performance due to significant MAI. In this paper implementation of chip interleaving with zero padding in GO-CDMA system is considered to alleviate the effect of MAI. It is shown that this approach results in bit-synchronous multipath signals at the receiving end. Computer simulations demonstrate that the usage of the simplest zero-forcing equalizer of moderate length provides performance very close to that of AWGN channel when interleaving is utilized.

BibTeX entry:

@INPROCEEDINGS{inpDuPaIp07a,
  title = {Oversaturated Group Orthogonal CDMA in Multipath Channels Using Chip Interleaving with Zero Padding},
  booktitle = {Proceedings of the 18th Annual IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC'07)},
  author = {Dudkov, Alexey and Paavola, Jarkko and Ipatov, Valery},
  year = {2007},
}

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

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