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Estimation of random errors for lidar based on noise scale factor

Chinese Physics B 2015年第8期24卷 386-390页

作者：王欢雪刘建国张天舒 University of Chinese Academy of Sciences Key Laboratory of Environment Optics and Technology Anhui Institute of Optics and Fine Mechanics Chinese Academy of Sciences

Estimation of random errors, which are due to shot noise of photomultiplier tube(PMT) or avalanche photodiode(APD) detectors, is very necessary in lidar observation. Due to the Poisson distribution of incident electrons, there still exists a proportional relationship between standard deviation and square root of its mean value. Based on this relationship,noise scale factor(NSF) is introduced into the estimation, which only needs a single data sample. This method overcomes the distractions of atmospheric fluctuations during calculation of random errors. The results show that this method is feasible and reliable.

关键词： atmospheric optics lidar random error noise factor noise scale factor

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A novel noise optimization technique for inductively degenerated CMOS LNA

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Journal of Semiconductors 2009年第10期30卷 137-142页

作者：耿志卿王海永吴南健 State Key Laboratory for Superlattices and Microstructures Institute of Semiconductors Chinese Academy of Sciences

This paper proposes a novel noise optimization *** technique gives analytical formulae for the noise performance of inductively degenerated CMOS low noise amplifier（LNA）circuits with an ideal gate inductor for a fixed bias voltage and nonideal gate inductor for a fixed power dissipation,respectively,by mathematical analysis and reasonable approximation *** circuits with required noise figure can be designed effectively and rapidly just by using hand calculations of the proposed *** design a 1.8 GHz LNA in a TSMC 0.25 μm CMOS *** measured results show a noise figure of 1.6 dB with a forward gain of 14.4 dB at a power consumption of 5 mW,demonstrating that the designed LNA circuits can achieve low noise figure levels at low power dissipation.

关键词： low noise optimization noise factor

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A new perturbation algorithm and enhancing security of SFLASH signature scheme

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Science China(Information Sciences) 2010年第4期53卷 760-768页

作者： WANG HouZhen1,2, ZHANG HuanGuo1,2*, GUAN HaiMing3 & HAN HaiQing1,2 1The Key Laboratory of Aerospace Information Security and Trusted Computing, Ministry of Education, Wuhan University, Wuhan 430072, China 2School of Computer, Wuhan University, Wuhan 430079, China 3Chinese Electronic Equipment System Corporation, Beijing 100039, China 1. The Key Laboratory of Aerospace Information Security and Trusted Computing Ministry of Education Wuhan University Wuhan 430072 China2. School of Computer Wuhan University Wuhan 430079 China3. Chinese Electronic Equipment System Corporation Beijing 100039 China

This paper introduces the concept of noise factor and noise operation, and constructs a noise group. We present a new perturbation algorithm for enhancing security of multivariate public key cryptosystems (MPKCs). European Consortium SFLASH which derives from Matsumoto-Imai scheme is a fast signature scheme intended for low cost smart cards. It was broken with the differential cryptanalysis by Dubois et al. in 2007. Taking Matsumoto-Imai system as an example, security analysis shows that the new algorithm can powerfully demolish its potential mathematical properties of the public key, and effectively avoid differential cryptanalysis without lowering the effciency of the original algorithm.

关键词： SFLASH differential cryptanalysis noise factor noise operation noise group

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