Now showing items 1-6 of 6

    • Capacity bounds for an ultra-wideband channel model 

      Ankan, E. (2004)
      There is an ongoing effort by the IEEE 802.15.3a subcommittee to reach a UWB personal area network standard. We estimate the achievable rates for such networks using a channel model specified by the same group. The analysis ...
    • Compressive sampling and adaptive multipath estimation 

      Pilanci, M.; Arikan, O. (2010)
      In many signal processing problems such as channel estimation and equalization, the problem reduces to a linear system of equations. In this proceeding we formulate and investigate linear equations systems with sparse ...
    • Cooperative transmission for multiuser MIMO systems 

      Yazarel, Y.K.; Aktaş, D. (2008)
      In this work, we investigate the problem of jointly determining the optimal transmission scheme at the base stations in a cooperative multiuser multiple antenna system. In this optimization problem, different than majority ...
    • Detection of sparse targets with structurally perturbed echo dictionaries 

      Guldogan, M. B.; Arikan, O. (Elsevier, 2013)
      In this paper, a novel algorithm is proposed to achieve robust high resolution detection in sparse multipath channels. Currently used sparse reconstruction techniques are not immediately applicable in multipath channel ...
    • Nondata-aided channel estimation for OFDM systems with space-frequency transmit diversity 

      Cırpan, H. A.; Panayırcı, E.; Doğan, H. (Institute of Electrical and Electronics Engineers, 2006)
      This paper proposes a computationally efficient nondata-aided maximum a posteriori (MAP) channel-estimation algorithm focusing on the space-frequency (SF) transmit diversity orthogonal frequency division multiplexing (OFDM) ...
    • Recovery of sparse perturbations in Least Squares problems 

      Pilanci, M.; Arikan, O. (2011)
      We show that the exact recovery of sparse perturbations on the coefficient matrix in overdetermined Least Squares problems is possible for a large class of perturbation structures. The well established theory of Compressed ...