id: 06087730
dt: j
an: 06087730
au: Wang, Donglin; Fattouche, Michel; Ghannouchi, Fadhel
ti: Fundamental limit of OFDM range estimation in a separable multipath
    environment.
so: Circuits Syst. Signal Process. 31, No. 3, 1215-1227 (2012).
py: 2012
pu: Birkhäuser Boston Inc. (Springer), Boston, MA
la: EN
cc: 
ut: time-based range estimation; non-data-bearing OFDM; separable multipath
    channel; Cramer-Rao lower bound; maximum likelihood estimator
ci: 
li: doi:10.1007/s00034-011-9366-x
ab: Summary: In this paper, orthogonal frequency division multiplexing (OFDM)
    for time-based range estimation (TBRE) in a separable multipath channel
    is investigated and analyzed with respect to its accuracy. First, the
    Cramer-Rao lower bound (CRLB) in a separable multipath channel is
    theoretically derived, and indicates a similar expression to that for a
    single path channel. The CRLB for non-data-bearing (NDB) OFDM
    transmission is compared to that for pseudo-noise (PN) transmission,
    demonstrating a large performance gap in favor of the NDB OFDM.
    Furthermore, the maximum likelihood estimator (MLE) for TBRE in a
    separable multipath channel is theoretically derived, also
    demonstrating a similar expression to that in a single path channel,
    except that several peaks instead of one peak are expected in a
    separable multipath channel corresponding to all arrival paths. The MLE
    for TBRE is then compared to the commonly used MLE for channel
    estimation, showing an equal performance in terms of mean square error
    when using an NDB OFDM transmission. Simulation results demonstrate a
    good agreement with our proposed theory.
rv: