This paper proposes a low power convolver in channel estimation. It works in the time domain. Ram is used instead of register chains in typical architectures. The power is compared when using different depth of rams. ...
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This paper proposes an AES algorithm against both differential power analysis and differential fault analysis and its hardware implementation. This new algorithm emphasizes the feature of defending hardware against tw...
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A novel data-aided timing acquisition scheme is proposed for UWB wireless communications. We adopt a two-stage strategy similar to the representative least-squares (LS) timing scheme. At the first stage, pulse-level t...
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A novel programmable security processor for cryptography algorithms is presented in this paper. The 16-bit length RISC-like instruction set and 3-stage pipeline provide low code density, low hardware cost and low powe...
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A low-cost cryptographic processor for security embedded system is presented in this paper. The processor, without any assistance of dedicated cryptographic coprocessors, is scalable and very efficient for popular cry...
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This paper presents the design of a direct conversion receiver front-end for UWB application. Its key feature is a wideband balun-coupled noise cancelling transconductance input stage, followed by double-balanced quad...
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Dimensioning wireless sensor networks requires formal methods to guarantee network performance and cost in any conditions. Based on network calculus, this paper presents a deterministic analysis method for evaluating ...
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Digital video camera has the properties of large noise, uncertain location of main body and high requirement of real-time. The disadvantages of traditional auto-focusing algorithms were discussed in detail and a new a...
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Digital video camera has the properties of large noise, uncertain location of main body and high requirement of real-time. The disadvantages of traditional auto-focusing algorithms were discussed in detail and a new auto-focusing algorithm was proposed. A novel focus measure filter called First Derivative of Gaussian (FDOG) was developed to estimate the degree of focusing correctly by the suppressing high frequency noise. To enable the auto-focusing system to focus on the exact main body, an automatic region-of-interest selection strategy based on the principle of nearest-subject-priority was adopted. Furthermore, combined with mountain-climbing search, binary search and quadratic interpolation, the proposed real-time search strategy greatly reduces the convergence time by about 40%, which enables the video camera to fast focus. The proposed algorithm is successfully implemented on a prototype digital video camera and experiment results are given to demonstrate the advantages of the proposed auto-focusing algorithm.
The proposed algorithm for digital imaging system ensures correct exposure to the main object of scenes with large dynamic range. The image window was divided into M × N tiles. Using the contrast between the main...
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The proposed algorithm for digital imaging system ensures correct exposure to the main object of scenes with large dynamic range. The image window was divided into M × N tiles. Using the contrast between the main object and the background of large dynamic scenes, the algorithm identified the main object through a certain search process, detected the lighting condition based on the search result, and then assigned different weights to the main object and the background so that the overall brightness level was made to carry more information of the main object. The experiment results show that the lighting conditions of all the scenes for evaluation are correctly detected. For the high dynamic range lighting conditions, the number of preview frames and the exposure error are less than 8.8 frames and 6.56% respectively.
This paper presents a 1-V 10bit 50MSPS Switched-Opamp (SO) S/H circuit, designed in 3.3V/1.8V 0.18m 1P6M CMOS technology, which could be used in wideband wireless transceivers. A new architecture of the low voltage sw...
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