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An Iterative MIMO-HSDPA Receiver Based On a K-Best-MAP Algorithm

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4 Author(s)
Mehlfuhrer, C. ; Inst. of Commun. & Radio-Freq. Eng., Vienna Univ. of Technol., Vienna ; Seethaler, D. ; Matz, G. ; Rupp, M.

We propose an iterative receiver for horizontally encoded MIMO systems like the PARC proposal for MIMO-HSDPA. Our receiver uses a K-best-MAP demodulator to provide the channel decoder with approximate log-likelihood ratios. The complexity of K-best-MAP is reduced by exploiting the CRC present in each encoded layer. We show that K-best-MAP with list update is superior to demodulation using a fixed candidate list. Finally, our numerical results demonstrate significant SNR gains as compared to a receiver using MMSE-based successive interference cancelation.

Published in:

Global Telecommunications Conference, 2006. GLOBECOM '06. IEEE

Date of Conference:

Nov. 27 2006-Dec. 1 2006