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Quantum evolutionary complex sphere decoder algorithm (QECSDA) is proposed. A brief analysis is then given to the theoretical basis and practical performance of signal detection in multiple-input multiple-output communication systems using QECSDA. The emulation results have shown that the proposed algorithm outperforms not only the zero-forcing (ZF) detector but also the ordered successive cancellation...
Evolutionary particle swarm algorithm is proposed for blindly identifying the communication channels. The channel coefficients vector candidates are evaluated by scoring positions of a swarm of particles flying through the multimodal problem space based on their values of the higher order cumulant cost function. The flying is constituted by the interaction of these particles and the alteration arrangement...
The detection ordering for the sphere decoder (SD) and its application in the blind signal detection of the time- varying orthogonal frequency division multiplexing (OFDM) systems are considered. For any matrix H and any permutation matrix P, the equation HP = QR always holds where P represents the detection ordering. In order to find an appropriate P to reduce the SD search complexity, we propose...
A novel digital image watermarking method based on wavelet domain fractal coding is presented in this paper. Employing the invariant parameters of the wavelet domain fractal transformation, we can retrieve the information embedded into the original image. In the watermarking scheme, the original collage map is altered to embed the watermark into the wavelet domain. Experiments show that the watermarking...
A conventional E-t curve for a.c. cyclic oscillochronopotentiometry can be parameterized approximately by three groups of quantities reflecting the inflection potentials, the phase angles of the inflections and the steepness of the oscillogram. Expressions are given in terms of these three parameters for the amplitudes of all the Fourier components of an E-t curve. Verification of the theoretical...
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