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www.adv-radio-sci.net/6/107/2008/
doi:10.5194/ars-6-107-2008
© Author(s) 2008. This work is distributed
under the Creative Commons Attribution 3.0 License.
A hybrid equalizer/Rake receiver for the Wideband CDMA Downlink in large delay spread channels
1Infineon Technologies, Am Campeon 1–12, 85579 Neubiberg, Germany
2Institut für Theoretische Elektrotechnik und Mikroelektronik, Univ. of Bremen, Otto-Hahn Allee, 28359 Bremen, Germany
3Embedded Systems and Signal Processing Group, University of Klagenfurt, Lakeside B02b, 9020 Klagenfurt, Austria
Abstract. Signals transmitted over a multi-path propagation channel exhibit Inter-Path Interference (IPI) and fading. The receiver has to employ measures to mitigate these effects or it will incur severe performance degradation. A classic approach in Code Division Multiple Access (CDMA) communications is the Rake receiver. Alternatively, a Linear Minimum Mean Square Error (LMMSE) equalizer can further improve performance. This paper compares performance and computational complexity of these two algorithms. A hybrid solution will be introduced in order to decrease computational complexity while retaining most of the interference suppression capabilities of the LMMSE equalizer.
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Citation: Buchacher, C., Zimmermann, M., Paul, S., and Huemer, M.: A hybrid equalizer/Rake receiver for the Wideband CDMA Downlink in large delay spread channels, Adv. Radio Sci., 6, 107-112, doi:10.5194/ars-6-107-2008, 2008. Bibtex EndNote Reference Manager XML
