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Unlike traditional entropy in information theory, this work uses the normalized energy instead of probability to obtain a low-frequency amplitude transform (LAT) on coefficients of discrete wavelet transform (DWT). The watermark is embedded based on the properties and characteristics of this transform. Finally, performance of the proposed scheme is assessed by signal-to-watermark (SWR) and bit error...
In order to avoid the resource inefficiency of all-participated cooperation in wireless amplify-and-forward relay networks, a novel relay selection scheme based on the channel gain of the source-relay and relay-destination links is proposed. A condition is introduced to maximize the upper bound of the overall received signal-to-noise ratio (SNR). The relay nodes which have bad channel conditions are...
In this paper, we propose a new relay selection scheme based on the channel gain of the source-to-relay and relay-to-destination links to maximize the upper bound on the overall received signal-to-noise ratio (SNR). In order to reduce the complexity of the scheme, we assume that each of the selected relays is allocated identical power. The total power is reasonably allocated between the source and...
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