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A hybrid weighted Fourier transform and relaxation (hybrid-WRELAX) method applied to Loran-C skywave delay estimation is presented. The performance of this method is demonstrated and compared with the spectrum analysis method. The hybrid-WRELAX method has been proved to provide higher accuracy to estimate the Loran-C skywave delay. Results testify this conclusion using off-air data.
A dynamic power allocation scheme is proposed to maximise the energy efficiency (EE) for multi-antenna transmissions when both the imperfect channel estimation and feedback are considered. The lower bounded ergodic EE is given by the temporal correlation analysis from the Kalman estimation and the differential codebook-based feedback of the Gauss–Markov channel, based on which both the powers of data...
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