Now showing items 1-8 of 8

    • Efficient structure-based carrier offset estimator for OFDM system 

      Hiren, G.; Qasaymeh, Mahmoud Mohammad; Nizar, T.; Pendse, Ravi; Sawan, M. Edwin (IEEE, 2009-04-26)
      In this paper, we proposed a closed form solution for blind orthogonal frequency division multiplexing (OFDM) carrier frequency offset (CFO) estimation employing the rank- revealing QR triangular factorization method (RRQR). ...
    • High resolution joint time delay and frequency estimation 

      Heba, S.; Hiren, G.; Qasaymeh, Mahmoud Mohammad; Nizar, T.; Sawan, M. Edwin; Pendse, Ravi (IEEE, 2009-03-30)
      Joint Time Delay and Frequency Estimation (JTDFE) problem of complex sinusoidal signals received at two separated sensors is an attractive problem that has been studied for many engineering applications. In this paper, the ...
    • Joint time delay and frequency estimation without eigen-decomposition 

      Qasaymeh, Mahmoud Mohammad; Gami, Hirenkumar; Tayem, Nizar Abdel-Hafeeth Mohammad; Sawan, M. Edwin; Pendse, Ravi (2009-05)
      In this letter, we addressed the problem of estimating the time delay and the frequencies of noisy sinusoidal signals received at two spatially separated sensors. We employ the Propagator Method (PM) in conjunction with ...
    • Propagator method for joint time delay and frequency estimation 

      Qasaymeh, Mahmoud Mohammad; Hiren, G.; Tayem, Nizar Abdel-Hafeeth Mohammad; Pendse, Ravi; Sawan, M. Edwin (IEEE, 2008-10-26)
      A novel method of estimating the differential delay of a sinusoidal signal is considered. The new method utilizes the propagator method (PM) which does not require the eigen-decomposition of the cross-spectral matrix (CSM) ...
    • Rank revealing QR factorization for jointly time delay and frequency estimation 

      Qasaymeh, Mahmoud Mohammad; Hiren, G.; Nizar, T.; Pendse, Ravi; Sawan, M. Edwin (IEEE, 2009-04-26)
      The rank-revealing QR factorization (RRQR) is a valuable tool in numerical linear algebra because it provides accurate information about rank and numerical null-space. In this paper, we addressed the problem of estimating ...
    • RRQR based closed-form blind carrier offset estimator for OFDM systems 

      Qasaymeh, Mahmoud Mohammad; Nizar, T.; Hiren, G.; Sawan, M. Edwin; Pendse, Ravi (IEEE, 2009-05-25)
      Carrier Frequency Offset (CFO) is one of the major drawbacks of the Multi Carrier Modulation (MCM) technique. Blind, semiblind and data-aided techniques have been introduced to estimate the CFO. In this paper, a new blind ...
    • Semiblind multiuser MIMO channel estimators using PM and RRQR methods 

      Pendse, Ravi; Hiren, G.; Sawan, M. Edwin; Qasaymeh, Mahmoud Mohammad; Nizar, T. (IEEE, 2009-05-11)
      Estimating the channel state information (CSI) of several transmitters that use orthogonal space-time block codes (OSTBC) to communicate with a single receiver is considered. Based on rank revealing QR (RRQR) factorization ...
    • Subspace based blind CFO estimation for OFDM by exploiting used carriers 

      Hiren, G.; Qasaymeh, Mahmoud Mohammad; Tayem, Nizar Abdel-Hafeeth Mohammad; Pendse, Ravi; Sawan, M. Edwin (IEEE, 2009-03-30)
      Orthogonal frequency division multiplexing (OFDM) is a promising technique to handle impairments of multipath channel. Alternatively, one of its major drawbacks is the drift in reference carrier, which is known as carrier ...