is a general method used in statistical signal processing.
Section 4 deals with the derivation of CRLB
, and performance evaluation has been discussed in Section 5.
Comparing standard deviation of the proposed method to that of CRLB
, it shows that the difference between them becomes less and less with the increasing SNR decibel values.
It can be observed that the CRLB
is attained when the SNR reaches 6 dB.
and mean squared error is computed for various values of N (Number of samples) for [lambda] = 200, 250 and 300 seconds.
2, the proposed algorithm is analysed for the RMSE of the estimated TOA for the signal perturbed due to the I/Q imbalance and compared to other algorithms and CRLB
In addition, as it is expected, when SNR increases, the RMSEs of the elevation and azimuth angle estimates decrease and approach to the CRLB
1/2] Target dependent metrics COM Co-occurrence matrix /COM Improved co-occurrence matrix TIC Texture-based Image Clutter CRLB
Cramer-Rao Lower Bound DOYLE = [[[([[mu].
Generally, the CRLB
provides a loose lower bound on the TOA estimate which is not realizable in multi-path environments .
In addition, the aRMSE of SDP-ML and CORR-ML are both far larger than CRLB
even when [sigma] is small, which demonstrates that NLOS has significant influence on the localization accuracy(note that [N.
The paper also proves that the TOA/SS scheme has a lower CRLB
than the TOA (or SS) scheme.
In this section, we first obtain the ML function with respect to the time-delay of different paths, and then give the procedure of pattern searching method to optimize the object function so as to get the time-delay values, and finally compute the CRLB