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Training based channel estimation algorithms for dual hop MIMO OFDM relay systems

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Figure

Fig. 1. Convergence of the proposed iterative channel estimation algorithmwith different initialisations forSNR Ns = Nr = Nd = 3, SNRs = {5, 10, 30} dB,r = 20 dB, ρs[l] = ρr[l] = ϱs[l] = ϱr[l] = 0.5, ∀l, and Hˆr = Hr.
Fig. 2. Source-relay channel estimation MSE against varying SNRsρ for the pro-posed and benchmark algorithms with Ns = Nr = Nd = 3, SNRr = 30 dB,s[l] = ρr[l] = ϱs[l] = ϱr[l] = 0.2, ∀l, and Hˆr = Hr.
Fig. 4. Source-relay channel estimation MSE against varying SNRs for the pro-posed and benchmark algorithms with Ns = Nr = Nd = 3, SNRr = 30 dB,ρs[l] = ϱs[l] = 0.8, ρr[l] = ϱr[l] = 0.2 ∀l, and Hˆr = Hr.

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