WCDMA HSDPA network performance with receive diversity and LMMSE chip equalization | IEEE Conference Publication | IEEE Xplore

WCDMA HSDPA network performance with receive diversity and LMMSE chip equalization


Abstract:

More advanced receiver structures than the conventional single antenna Rake can be used to improve the signal-to-noise (SNR) ratios, which is especially beneficial in ord...Show More

Abstract:

More advanced receiver structures than the conventional single antenna Rake can be used to improve the signal-to-noise (SNR) ratios, which is especially beneficial in order to utilize the high bit rates provided by the HSDPA concept in WCDMA network. In WCDMA system, orthogonal Walsh-Hadamard sequences are used as channelization codes. In frequency-selective fading channels the orthogonality of channelization codes disappears and intra-cell multiple access interference (MAI) arises. In order to mitigate the effect of MAI, a chip-level equalization has shown to be a simple and effective solution. The effectiveness of chip equalization, however, degrades at the cell borders where the inter-cell interference dominates rather than MAI. Dual antenna is a straight-forward solution to mitigate that performance drop. In this paper we consider receivers equipped with dual antenna and linear minimum mean squared error (LMMSE) chip-level equalizers and present an analysts of the expected gains over conventional single and dual antenna rake receivers in realistic situations by using a dynamic WCDMA system-level tool
Date of Conference: 11-14 September 2005
Date Added to IEEE Xplore: 24 July 2006
Print ISBN:978-3-8007-2909-8

ISSN Information:

Conference Location: Berlin, Germany

References

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