In this paper, a power-based channel identification method is investigated based on the Cross-relations (CR) subspace of SIMO channels. The proposed method remains in stable condition and reduces the computational bur...
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In this paper, a power-based channel identification method is investigated based on the Cross-relations (CR) subspace of SIMO channels. The proposed method remains in stable condition and reduces the computational burden due to avoiding matrix inversion and joint square matrix multiplication. Compared to the Mul-tichannel least mean squared (MCLMS) method, it owns a faster convergence rate and the higher estimation accuracy with a close complexity. Furthermore, its performance is the same as the Cross-relations subspace iterations with Inversion (CRSI-INV) method and exceeds that of the Multichannel Newton (MCN) method in case of sufficient data samples, but with a lower complexity. Besides, a comparative study on channel identification methods is proposed and analyzed with respect to convergence rate and computational complexity. Simulations are also provided for demonstrating the superior performance of the proposed scheme.
This paper presents an improvement for a bit error rate (BER) performance in a free-space optical communication system over log-normal fading channel and misalignment effect, by using single-input multiple-output (SIM...
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This paper presents an improvement for a bit error rate (BER) performance in a free-space optical communication system over log-normal fading channel and misalignment effect, by using single-input multiple-output (SIMO) technique with maximal ratio combining. Differential phase shift keying with subcarrier intensity modulation is applied. The BER closed-form expression is obtained and compared to integration numerically solution. The simulation results show that the BER performance is improved by using SIMO system.
This paper addresses optimum nondiagonal and diagonal amplifying relay matrices for the amplify-and-forward (AF) wireless relay networks. single-input multiple-output (SIMO) nondistributed and distributed relaying sys...
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ISBN:
(纸本)9781479944811
This paper addresses optimum nondiagonal and diagonal amplifying relay matrices for the amplify-and-forward (AF) wireless relay networks. single-input multiple-output (SIMO) nondistributed and distributed relaying system strategies with the relay power constraint are applied, based on the signal-to-noise ratio (SNR) criterion. By adopting the optimum amplifying relay matrices derived, the SNRs at the destinations are analytically and numerically investigated in order to evaluate the proposed system. In particular, using the SNR values, it can be predicted which scheme would yield a better system performance than the others.
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