@conference{10902/36326, year = {2008}, url = {https://hdl.handle.net/10902/36326}, abstract = {In this paper we consider the problem of blind estimation of time-varying multiple-input multiple-output (MIMO) channels under space-time block coded (STBC) transmissions. Firstly, the time-varying channel is deterministically represented by means of a basis expansion model (BEM), which reduces the number of parameters to be estimated. Secondly, the STBC structure is exploited to blindly recover the channel parameters by means of a subspace technique, which reduces to the solution of a generalized eigenvalue problem (GEV). Unlike previous approaches, the proposed method provides very accurate results even for non-orthogonal STBCs and high Doppler frequencies, which is illustrated by means of some numerical examples.}, organization = {This work was supported by the Spanish Government (MEC) under project TEC2007-68020-C04-02 (Multi MIMO).}, publisher = {Institute of Electrical and Electronics Engineers, Inc.}, publisher = {16th European Signal Processing Conference (EUSIPCO), Lausanne, Switzerland, 2008}, title = {A subspace approach for blind estimation of time-varying channels under STBC transmissions}, author = {Vía Rodríguez, Javier and Santamaría Caballero, Luis Ignacio and Pérez Arriaga, Jesús}, }