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Reversible data hiding has been a hot research topic because it can recover both the host media and hidden data without distortion. Because most digital images are stored and transmitted in compressed forms, such as JPEG, vector quantization, and block truncation coding (BTC), the reversible data hiding schemes in compressed domains have been paid more and more attention. Compared with transform coding,...
Low-dropout voltage regulator (LDO) is widely used in up-to-date electrical systems but with severe EMC problems. Its susceptibility prediction has become one of the major concerns both of IC suppliers before fabrication to avoid redesign cost and customers before real application to reduce incompatible. This paper presents a LDO susceptibility modeling study including IEC standard modeling flow and...
This paper presents a new approach for hiding information in digital audio based on the audio-to-image wavelet transform (A2IWT) and vector quantization (VQ). In our scheme, the cover audio signal is first transformed into an image by utilizing the wavelet transform and re-sampling the coefficients, then the secret data are embedded in the obtained image using a VQ-based image steganographic scheme,...
In this paper, a test chip is introduced to study the susceptibility of low dropout voltage regulator (LDO) by direct RF power injection (DPI) method. The structure and failure mechanism of LDO module is analyzed. Both of hardware and software DPI set-up are given to characterize the test flow. A novel test method of on-chip sensor sampling is described by the functional frame and sampling arithmetic...
Some mobile ad hoc networks (MANETs) such as inter-vehicle communications require a transmission scheme that is robust to mobility and asynchronous reception with low setup overhead. However, many existing cooperative MANETs have complex MAC protocol and high overhead. In this paper, we propose a cross-layer design across the routing, MAC and PHY layers, called delay-tolerant cooperative diversity...
To make the implementation of high-rate space-time block code (STBC) realistic in practical systems, fast-decodable (FD) and group-decodable (GD) code structures have been separately introduced into STBC to reduce the sphere decoding complexity. However, no STBC has both the two code structures until now. In this paper, high-rate fast-group-decodable STBC (FGD-STBC, which has both FD and GD code structures)...
Abstract-In this paper, novel real symbol-wise ML decodable STBCs with balanced information distribution per codeword are constructed systemically for arbitrary number of transmit antennas. Compared with the existing real symbol-wise ML decodable STBCs in IEEE 802.16e standard, the proposed STBCs also have lower peak-to-average power ratio (PAPR) and better performance even without adaptive antenna...
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