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A high speed reconfigurable face detection architecture

A high speed reconfigurable face detection architecture

引用

2011 IEEE 9th International Conference on asic, asicON 2011

作者： Zhou, Weina Zou, Yao Dai, Lin Zeng, Xiaoyang State Key Lab. of ASIC and System Fudan University Shanghai 201203 China Shanghai Maritime University Shanghai 200135 China

ISBN: (纸本)9781612841908

Face detection has been playing an important role in more and more fields, which makes it necessary and urgent to have its architecture reconfigurable to satisfy different requirements on detection capabilities. The paper proposes a face detection architecture, which could be adjusted by the users according to the environment, the sensor resolution, the different requirements of detection accuracy and speed. This user adjustable mode makes the reconfiguration simple and efficient, and especially benefits for the application of portable mobile terminals whose working condition often changes frequently. Experimental results show that the reconfiguration of the architecture is very reasonable in face detection and synthesized report also indicates its advantage on speed and accuracy. © 2011 IEEE.

关键词： Face recognition

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Design of a UHF RFID tag baseband with the hummingbird cryptographic engine

Design of a UHF RFID tag baseband with the hummingbird crypt...

引用

2011 IEEE 9th International Conference on asic, asicON 2011

作者： Xiao, Mengqin Shen, Xiang Wang, Junyu Crop, Joseph State Key Lab. of ASIC and System Fudan University Shanghai 200433 China Department of EECS Oregon State University Corvallis OR 97330 United States

ISBN: (纸本)9781612841908

Radio frequency identification (RFID) is a technology for automatic object identification. It has wide applications in many areas such as manufacturing, transportation, healthcare, and so on. However, many RFID systems are suffering from security issues. In this paper, we present an implementation of a secure UHF RFID tag baseband with a Hummingbird (HB) cryptographic engine using the SMIC 0.13μm technology. An improvement of the Gen2 protocol based on our secure engine is proposed to enhance security. The implementation results show that the area of our baseband is 16,986 gate equivalents and the secure engine takes 23.6% of the entire die area. The overall power consumption of our baseband is 30.67μW at a clock frequency of 1.28MHz and with 1.2V power supply, which is suitable for resource-constrained RFID tags. © 2011 IEEE.

关键词： Cryptography

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Optimization of mixed polarity Reed-Muller expressions based on whole annealing genetic algorithm

Optimization of mixed polarity Reed-Muller expressions based...

引用

2011 IEEE 9th International Conference on asic, asicON 2011

作者： Yang, Meng Xu, Hongying State Key Lab. of ASIC and System Fudan University Shanghai 201203 China Tianjin Vocational College of Mechanics and Electricity Tianjin 300131 China

ISBN: (纸本)9781612841908

This paper presents a Whole Annealing Genetic Algorithm (WAGA) to obtain a good circuit implementation among mixed polarity Reed-Muller expressions. By combining global searching ability of genetic algorithm and local searching ability of simulated annealing, WAGA could achieve fast convergence. Apart from genetic operators such as crossover operator and mutation operator are used in genetic algorithm stage, it uses annealing operator at annealing stage. At the annealing stage, WAGA forms an intermediate population by selecting 2/3 population from previous generation and 2/3 population from current generation. Annealing operator is then applied to the intermediate population. To achieve an efficient CPU utilization, the calculation of the cost function of WAGA is based on a parallel manner, in which newly generated terms are obtained at one time. The results of tested benchmark show that the algorithm is highly effective for searching the best polarity and achieves 13% improvement on average in terms of CPU time. © 2011 IEEE.

关键词： Genetic algorithms

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Wireless powered implantable bio-sensor tag system-on-chip for continuous glucose monitoring

Wireless powered implantable bio-sensor tag system-on-chip f...

引用

2011 IEEE Biomedical Circuits and systems Conference, BioCAS 2011

作者： Guan, Shuo Gu, Jingren Shen, Zhonghan Wang, Junyu Huang, Yue Mason, Andrew State Key Lab. of ASIC and System Fudan University Shanghai China Department of Electrical and Computer Engineering Michigan State University East Lansing MI United States

ISBN: (纸本)9781457714696

An implantable passive radio frequency identification (RFID) sensor tag system-on-chip (SoC) for glucose monitoring is developed in this paper. A high frequency RFID tag, a bio-sensor interface, as well as the electrodes are included in this chip. The signal of blood sugar level from the bio-sensor is detected and converted into digital data, and then the data is encrypted and transmitted to an RFID reader on top of the skin. To measure the weak current signals, a current readout circuit, a current splitter, an ADC and a potentiostat are designed in the chip. Correlated double sample (CDS) technology is used in the readout circuit to reduce the 1/f noise and the op-amp's offset. The chip is taped out in SMIC 0.13 μm CMOS process. Simulation results show that the system can measure weak current signals in the range of 10 fA-100 pA. © 2011 IEEE.

关键词： system-on-chip

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MUX-MCM based quantization VLSI architecture for H.264/AVC high profile encoder

MUX-MCM based quantization VLSI architecture for H.264/AVC h...

引用

2011 IEEE/IFIP 19th International Conference on VLSI and system-on-Chip, VLSI-SoC 2011

作者： Ying, Jiang Chen, Xinhua Fan, Yibo Zeng, Xiaoyang College of Information Science and Engineering Shandong University of Science and Technology Qingdao China State Key Lab. of ASIC and System Fudan University Shanghai China

ISBN: (纸本)9781457701719

This paper presents a hardware-efficient and high-throughput quantization implementation for H.264/AVC high profiles encoder. The constant multiplication in quantization is accomplished by time-multiplexed multiple-constant multipliers (MUX-MCM). By rational pipeline decision, the proposed design manages to achieve a high throughput at a low area cost. Synthesized with SMIC0.18μm technology, the proposed design reaches a maximum operating frequency of 250Mhz with a throughput of 1Gpixels/sec at the hardware cost of 28.56 Kgates. © 2011 IEEE.

关键词： Throughput

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A full-mode FME VLSI architecture based on 8x8/4x4 adaptive Hadamard Transform for QFHD H.264/AVC encoder

A full-mode FME VLSI architecture based on 8x8/4x4 adaptive ...

引用

2011 IEEE/IFIP 19th International Conference on VLSI and system-on-Chip, VLSI-SoC 2011

作者： Liu, Jialiang Chen, Xinhua Fan, Yibo Zeng, Xiaoyang College of Information Science and Engineering Shandong University of Science and Technology Qingdao China State Key Lab. of ASIC and System Fudan University Shanghai China

ISBN: (纸本)9781457701719

Adaptive Block-size Transform (ABT) has been added to H.264/AVC standard with the Fidelity Range Extension. In this paper, we apply this ABT concept to our FME design and propose a full-mode FME architecture based on 8x8/4x4 adaptive Hadamard Transform. This technique can avoid unifying all variable block-size blocks into 4x4-size blocks and improve the encoding performance. We also exploit the linearity of Hadamard Transform in quarter-pel refinement and decrease the cycles caused by the second long search process. In architecture level, we employ two interpolating engines that can support 8-pel and 4-pel input to time-share one SATD (Sum of Absolute Hadamard Transform) Generator. These strategies can increase parallelism and reduce the cycles efficiently. Besides, this design can support full modes, which guarantees the encoding performance. Experimental results show that our design can achieve real-time processing for QFHD@30fps at the operation frequency of 320MHz with 444.6K gates hardware. © 2011 IEEE.

关键词： Signal encoding

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An efficient algorithm for multi-domain clock skew scheduling

An efficient algorithm for multi-domain clock skew schedulin...

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作者： Zhi, Yanling Luk, Wai-Shing Zhou, Hai Yan, Changhao Zhu, Hengliang Zeng, Xuan State Key Lab. of ASIC and System Microelectronics Department Fudan University China Department of EECS Northwestern University United States

ISBN: (纸本)9783981080179

Conventional clock skew scheduling for sequential circuits can be formulated as a minimum cycle ratio (MCR) problem, and hence can be solved effectively by methods such as Howard's algorithm. However, its application is practically limited due to the difficulties in reliably implementing a large set of arbitrary dedicated clock delays for the flip-flops. Multi-domain clock skew scheduling was proposed to tackle this impracticality by constraining the total number of clock delays. Even though this problem can be formulated as a mixed integer linear programming (MILP), it is expensive to solve optimally in general. In this paper, we show that, under mild restrictions, the underlying domain assignment problem can be formulated as a special MILP that can be solved effectively using similar techniques for the MCR problem. In particular, we design a generalized Howard's algorithm for solving this problem efficiently. We also develop a critical-cycle-oriented refinement algorithm to further improve the results. The experimental results on ISCAS89 benchmarks show both the accuracy and efficiency of our algorithm. For example, only 4.3% of the tests have larger than 1% degradation (3% in the worst case), and all the tests finish in less than 0.7 seconds on a laptop with a 2.1GHz processor. © 2011 EDAA.

关键词： Flip flop circuits

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Planar on-chip flow cytometer using evanescent waves based on liquid total internal reflection (L-TIR)

Planar on-chip flow cytometer using evanescent waves based o...

引用

International Solid-state Sensors, Actuators and Microsystems Conference

作者： Huang, H. Ji, X.M. Zhou, J. Huang, T.J. Huang, Y.P. ASIC and System State Key Lab Department of Microelectronics Fudan University Shanghai China Department of Engineering Science and Mechanics Pennsylvania State University University Park PA United States

ISBN: (纸本)9781457701573

This paper reports a planar flow cytometer for the detection of fluorescent particles using evanescent waves based on the liquid total internal reflection (L-TIR). This on-chip flow cytometer is able to form the evanescent waves on the interface between liquids which can be used to detect the fluorescent particles in nanosize with high speeds. The total internal reflection is formed to generate the evanescent waves by the geometry of the liquid interface which is defined by the structure of the device. The particles are injected and focused by the hydrodynamic method which makes the particles go through the optical detection area shined by the exciting laser one by one. This method has been proven to be a fast and effective method to analyze fluorescent particles or cells with the exciting light in the depth of several hundred nanometers. © 2011 IEEE.

关键词： Liquids

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Wideband spectrum sensing using the all-phase FFT

Wideband spectrum sensing using the all-phase FFT

引用

2011 IEEE 9th International Conference on asic, asicON 2011

作者： Huai, Lian Sobelman, Gerald E. Zhou, Xiaofang Department of Electrical and Computer Engineering University of Minnesota Minneapolis MN 55455 United States State Key Lab. of ASIC and System Fudan University Shanghai China

ISBN: (纸本)9781612841908

Spectrum sensing is a key technology of cognitive radio. The goal of spectrum sensing in this context is to achieve a high detection probability in order to avoid causing interference to the primary licensed users. Among the methods available for spectrum sensing, energy detection has been widely applied in hardware implementations. However, since previous work has been based on the traditional FFT, the side leakage problem makes it difficult to detect a primary user adjacent to a strong signal. In this paper, we propose an all-phase FFT based wideband spectrum sensing processor. Simulation results show that it can increase the probability of detection of a primary user that is adjacent in frequency to a strong signal. It can also improve the receiver operating characteristic curve. Hardware implementation requirements are also given. © 2011 IEEE.

关键词： Fast Fourier transforms

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Fluorescence enhancement via single-core liquid waveguides in microfluidic channels

Fluorescence enhancement via single-core liquid waveguides i...

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International Solid-state Sensors, Actuators and Microsystems Conference

ISBN: (纸本)9781457701573

A single-core liquid waveguide is reported to be used in the fluorescence enhancement. The liquid waveguide consists of the high refractive index liquid core and the low refractive index sheath liquid. The diameter of the liquid core can be tuned by sheath flow, and the liquid waveguide can work in different status of the refractive index profiles by the diffusion of the high refractive index solution. Because of the total internal reflection on the liquid interface and the focusing by the gradient refractive indices, the intensity of the fluorescent light collected inside the liquid core is increased. The fluorescence enhancement by the liquid waveguide is characterized by measuring the intensities from the top and the end of the liquid waveguide by the spectrometer. The result shows that the fluorescence enhancement is successfully achieved in the liquid waveguide by controlling the refractive index profiles of the liquids. © 2011 IEEE.

关键词： Liquids

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