NON-UNITARY EXTENSIONS OF DIFFERENTIAL MATRIX MODULATION (ThuAmOR4)

Author(s) : Gerhard Bauch (DoCoMo Euro-Labs, Germany) Anil Mengi (DoCoMo Euro-Labs, Germany)

Abstract : Differential matrix modulation is an attractive alternative for MIMO transmission since it does not require channel estimation at the receiver. Most proposals are based on unitary matrices. Assuming a receiver with relatively low complexity, we will show that the performance at higher bandwidth-efficiency can be improved by using non-unitary matrix constellations. We compare different non-unitary schemes and their soft-output detectors.

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