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Journal articles

Double Khatri-Rao Space-Time-Frequency coding using semi-blind PARAFAC based receiver

Abstract : We first introduce a new class of tensor models for fourth-order tensors, referred to as “nested PARAFAC models.” Then, we present a space-time-frequency (STF) coding scheme for multiple antenna orthogonal frequency division multiplexing systems. This scheme, called double Khatri-Rao STF (D-KRSTF) coding, combines time-domain spreading with space-frequency precoding and provides an extension of Khatri-Rao space-time (KRST) coding . We show that the received signals define a fourth-order tensor satisfying two nested PARAFAC models, and a semi-blind receiver is then derived using a two-step alternating least squares algorithm for joint channel and symbol estimation. Simulation results show that our receiver offers superior performance compared with previously proposed tensor-based solutions and operates close to the zero forcing receiver with perfect channel state information.
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Contributor : Gérard Favier Connect in order to contact the contributor
Submitted on : Friday, December 18, 2015 - 12:33:32 AM
Last modification on : Tuesday, December 7, 2021 - 4:10:15 PM




André de Almeida, Gérard Favier. Double Khatri-Rao Space-Time-Frequency coding using semi-blind PARAFAC based receiver . IEEE Signal Processing Letters, Institute of Electrical and Electronics Engineers, 2013, 20 (5), pp.471-474. ⟨10.1109/LSP.2013.2248149⟩. ⟨hal-01246044⟩



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