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

— We propose an iterative receiver for horizontally encoded MIMO systems like the PARC proposal for MIMOHSDPA. 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.

• Type: Conference
• Year: 2006
• Where: GLOBECOM
• Authors: Christian Mehlführer, Dominik Seethaler, Gerald Matz, Markus Rupp
• Keywords: Approximate Log-likelihood Ratios, GLOBECOM 2006, Iterative Receiver, Successive Interference Cancelation, Telecommunications