Efficient Near Maximum-Likelihood Decoding of Multistratum Space-Time Codes

Authors: R. Böhnke, V. Kühn, K.-D. Kammeyer
Abstract: Multistratum space-time codes combine the layered transmission strategy of V-BLAST with space-time block coding in order to achieve high data rates and at the same time exploit transmit diversity. Simple detection schemes like successive interference cancellation severely suffer from the strong correlation between the strata, so true maximum-likelihood detection needs to be performed instead, which can be efficiently realized by the sphere decoding algorithm. However, most implementations known from the literature still have relatively high complexity, especially for low signal to noise ratio. Therefore, we propose several modifications that can reduce the computational effort by orders of magnitude while achieving at least near optimum performance.
Document type: Conference Paper
Publication: Los Angeles, California, USA, 26. - 29. September 2004
Conference: IEEE Vehicular Technology Conference (VTC Fall 2004)
Index: 234
VTC_Fall_2004_boehnke.pdf211 KBVTC_Fall_2004_boehnke.ps296 KB
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