Performance comparison of the multi-code fixed spreading length (MFSL) scheme and the variable spreading length (VSL) scheme for multi-rate MC-CDMA

Document Type

Conference Proceeding

Publication Date

1-1-2002

Abstract

In this paper, we compare the performance of two important multi-rate transmission schemes: the variable spreading length (VSL) scheme and the multicode fixed spreading length (MFSL) scheme fur MC-CDMA system. Minimum Mean Square Error Combining (MMSEC) is applied for both schemes to cancel the multiuser interference (MUI). It is found that by selecting orthogonal Walsh Hadamard sequences as spreading codes and properly assigning codes for each user, the inter-carrier interference (ICI) caused by the nonorthogonality of sub-carriers in the VSL scheme can be eliminated and the self-interference (SI) caused by employing multiple codes for each user in the MFSL scheme can also be reduced. The bit error rate (BER) performance of each scheme is obtained by anaiysis and simulation in a correlated Rayleigh fading channel.

Identifier

33644972240 (Scopus)

ISBN

[0780376277]

Publication Title

IEEE International Symposium on Spread Spectrum Techniques and Applications

External Full Text Location

https://doi.org/10.1109/ISSSTA.2002.1049296

First Page

108

Last Page

112

Volume

1

Grant

CCR-9903381

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