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Based on this model, MMSE estimators minimize the estimation error variance conditioned on the observations.
Based on this, assuming identical noise variances on all subcarriers and optimizing the weights to minimize the estimation variance under the constraint of an unbiased estimator, it can be shown that the MRC weights corresponding to the different subcarriers must be proportional to | Ĉ k |.
It has been shown in [48] that the estimate N ̂ opt of N opt can be found via (108) to minimize the estimation error of all of the states or the k th one as, respectively, N ̂ opt ≅ arg min n ∂ ∂n tr V n + 1, (109).
In addition, as the SDP method can achieve global minimal, if necessary, the estimated target position can be used to re-select the anchor Rx node to minimize the estimation error.
The problem of designing the sampled-data fuzzy controller to minimize the estimation as well as to guarantee the stability is formulated and solved as the convex optimization problem with LMI constraints.
The optimal training sequence that can minimize the estimation MSE was also derived.
Similar(42)
The computation is based on a distributed optimization approach that guarantees the stability of the estimator while minimizing the estimation error variance.
Hence, we obtain a general form of the linear estimator, appropriate for Rician fading channels, that minimizes the estimation error of channel matrix.
The algorithms considered include a Kalman filter that minimizes the estimation error variance, an H∞ filter that minimizes the worst-case estimation error, and a robust mixed Kalman/H∞ filter that allows for uncertainties in both the system and measurement matrices.
In the first one the robust waveforms are computed by minimizing the estimation error of the worst-case target realization and in the second, target estimation error of the scaled least square (SLS) estimator is minimized.
Since the channel estimation performance is affected directly by the positions of pilot tones, the optimization of pilot placement process known as having quite important role on minimizing the estimation errors has become a significant task for the multicarrier transmission technologies.
More suggestions(15)
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com