Performance Enhancement of Multicarrier CDMA Systems Impaired by Chip Timing JitterL. Tomba, W.A. Krzymien
Proceedings of the IEEE Fourth International Symposium on Spread Spectrum Techniques & Applications (ISSSTA '96), vol. 1/3, pp. 136-140, Electoral Palace, Mainz, Germany, September 22-25, 1996
In this paper we deal with the effect of chip timing jitter (or chip synchronization error) in multicarrier code division multiple access (MC-CDMA) schemes. Downlink is considered in the analysis. We show that the presence of a timing error less than about 20% of the sampling period can be modelled by an equivalent additional amount of additive white Gaussian noise. This result is useful for two reasons. Firstly, we can get analytical or semi-analytical formulas for the error probability. Secondly, the effect of chip timing jitter can be mitigated by using a simple time diversity technique in combination with forward error correction coding and an ARQ scheme, as in type-I hybrid ARQ protocol. Results are given in terms of bit error rate for a typical multipath indoor radio channel.
CONTACTS: Luciano Tomba, Witold A. Krzymien
SUBJECTS: Modulation and Decoding
TYPE: Conference Publication
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