2011 28th National Radio Science Conference (NRSC)最新文献_第6页

Low profile dual band slotted-patch antenna for WIMAX applications 用于WIMAX应用的低轮廓双频段开槽贴片天线

2011 28th National Radio Science Conference (NRSC) Pub Date : 2011-04-26 DOI: 10.1109/NRSC.2011.5873581

N. Areed

引用次数: 0

Classification of multi-user chirp modulation signals using higher order cumulant features and four types of classifiers 利用高阶累积特征和四种分类器对多用户啁啾调制信号进行分类

2011 28th National Radio Science Conference (NRSC) Pub Date : 2011-04-26 DOI: 10.1109/NRSC.2011.5873611

S. El-Khamy, H. Elsayed, M. Rizk

引用次数: 9

Embedded digital signal processing for digital ultrasound imaging 用于数字超声成像的嵌入式数字信号处理

2011 28th National Radio Science Conference (NRSC) Pub Date : 2011-04-26 DOI: 10.1109/NRSC.2011.5873642

M. Hassan, A. Youssef, Y. Kadah

{"title":"Embedded digital signal processing for digital ultrasound imaging","authors":"M. Hassan, A. Youssef, Y. Kadah","doi":"10.1109/NRSC.2011.5873642","DOIUrl":"https://doi.org/10.1109/NRSC.2011.5873642","url":null,"abstract":"Ultrasound imaging is an efficient, noninvasive, method for medical diagnosis. Efficient implementations of digital ultrasound systems on embedded digital signal processing on FPGA, this miniaturization enables a design with low power consumption, low noise, and light weight. This paper proposed embedded digital signal processing (DSP) for digital ultrasound imaging on FPGA (Xilinx, Inc.). The DSP was composed of FIR Hilbert transform filter, which was used to generate Quadrature component (Q) from the In-phase component (I) of the ultrasound data. The envelope (magnitude) of the received echo was computed. The implementation has been done in the Virtex-5 FPGA. The objective of this work is to build embedded DSP for ultrasound imaging system using the FIR Hilbert transform filter, which will be described in the methods. The system was consisted of: the pipeline adder block to reconstruct the focus ultrasound line, the bit modifier block to modify the bit of the signal to 16 bit, the FIR Hilbert filter block to obtain the quadrature components, the fractional delay filter (in-phase filter) to compensate the delay when we were used a high FIR order, and the envelope detection block to compute the envelope of the in-phase and quadrature components. The Hilbert filter is implemented in the form whereby the zero tap coefficients are not computed and therefore an order L filter uses only L/2 multiplications. This was reducing the computational time by a half. The simulation results of FIR Hilbert filter and the envelope detection are near to the ideal Hilbert. The results of the implementation are good compared to the simulation results. From the implementation result the total estimated power consumption equal to 0.8142W and the device utilization was acceptable. It is possible for the system to accept anther devices for further processing. The hardware architecture of the design provided flexibility.","PeriodicalId":438638,"journal":{"name":"2011 28th National Radio Science Conference (NRSC)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129335837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Energy efficient key management scheme based on elliptic curve signcryption for Wireless Sensor Networks 基于椭圆曲线加密的无线传感器网络节能密钥管理方案

2011 28th National Radio Science Conference (NRSC) Pub Date : 2011-04-26 DOI: 10.1109/NRSC.2011.5873614

E. Hagras, Doaa El-Saied, Hazem H. Aly

引用次数: 14

Robust image transmission with OFDM over an AWGN channel 在AWGN信道上使用OFDM进行鲁棒图像传输

2011 28th National Radio Science Conference (NRSC) Pub Date : 2011-04-26 DOI: 10.1109/NRSC.2011.5873604

N. Soliman, A. Shaalan, M. Fouad

引用次数: 3

FPGA implementation of LMS adaptive filter LMS自适应滤波器的FPGA实现

2011 28th National Radio Science Conference (NRSC) Pub Date : 2011-04-26 DOI: 10.1109/NRSC.2011.5873634

M. Salah, A. Zekry, Mohammed Kamel

引用次数: 10

A Fast Iterative Blind image restoration algorithm 一种快速迭代盲图像恢复算法

2011 28th National Radio Science Conference (NRSC) Pub Date : 2011-04-26 DOI: 10.1109/NRSC.2011.5873621

M. Fahmy, G. Raheem, U. S. Mohammed, O. Fahmy

引用次数: 7

A study of access methods effect on the performance of two-tier LTE femtocell networks 接入方式对两层LTE飞蜂窝网络性能影响的研究

2011 28th National Radio Science Conference (NRSC) Pub Date : 2011-04-26 DOI: 10.1109/NRSC.2011.5873600

M. El- Gendy, E. Sourour

引用次数: 3

Generation of perfect random sequences using tailored chaotic maps 使用定制混沌映射生成完美随机序列

2011 28th National Radio Science Conference (NRSC) Pub Date : 2011-04-26 DOI: 10.1109/NRSC.2011.5873615

S. El-Khamy, A.E. Youssef, M. Rizk

{"title":"Generation of perfect random sequences using tailored chaotic maps","authors":"S. El-Khamy, A.E. Youssef, M. Rizk","doi":"10.1109/NRSC.2011.5873615","DOIUrl":"https://doi.org/10.1109/NRSC.2011.5873615","url":null,"abstract":"In this paper, it was intended to investigate the possibility of generating a random chaotic sequence, having a uniform histogram, using a chaotic sequence matching a given histogram and a chaotic sequence matching the complement of this histogram. To study the relation between these two sequences three methods are used to determine the complement of the histogram. Then based on the chaotic map tailoring synthesis method, the given histogram and a chosen starting point are used to generate the first chaotic sequence of a length L. The same procedure is repeated with the complement histogram to generate the second chaotic sequence of same length L. Histograms are computed for each of the sequences. The two generated chaotic sequences are then combined through simple interleaving resulting in a third sequence of length 2L whose histogram is then determined. The process is repeated for the two methods used to determine the complement histogram. Unlike expected, the third sequence histogram is not a uniform one. In the third method, to obtain a sequence having uniform histogram, it is found necessary to combine, through simple concatenation, two relatively computed different lengths of first and second chaotic sequences generated using original and complement histograms of the second or first methods.","PeriodicalId":438638,"journal":{"name":"2011 28th National Radio Science Conference (NRSC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130544203","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bias dependence of NMOS and PMOS equivalent input circuits for 32–16nm gate length 栅极长度为32–16nm时NMOS和PMOS等效输入电路的偏置依赖性

2011 28th National Radio Science Conference (NRSC) Pub Date : 2011-04-26 DOI: 10.1109/NRSC.2011.5873637

A. Bayoumi, Y. Hanafy

{"title":"Bias dependence of NMOS and PMOS equivalent input circuits for 32–16nm gate length","authors":"A. Bayoumi, Y. Hanafy","doi":"10.1109/NRSC.2011.5873637","DOIUrl":"https://doi.org/10.1109/NRSC.2011.5873637","url":null,"abstract":"As CMOS evolves from 32nm down to 16nm technologies, several technological changes suggest we can more efficiently use linear RC approximations to model the input stages of NMOS & PMOS. This improves the non-linearity of input stages of analog circuits such as RF amplifiers and buffers with input signal voltage levels, thus allowing better matching networks. This linearization is also critical when using fast spice in modeling the digital parts of a mixed signal RFICs. For physical gate lengths of 32 – 16nm, smaller gate area results in more pronounced role for overlap capacitance over source/drain (which is independent of voltage). Metal gates have replaced polysilicon, eliminating polysilicon depletion. This makes effective gate capacitance less voltage dependent in inversion. Metal gates have low resistivity, which makes non-quasi static characteristics easier to model and more uniform along the channel width, because of the reduction of the distributed gate resistance effect. Finally, using high dielectric constant (high-k) dielectrics to replace the thin gate oxides resulted in drastic reduction in gate leakage direct tunneling current, which is modeled as parallel conductance with an exponential dependence on applied gate voltage. In this paper, recently reported technology device features are used to update BSIM4 predictive technology models (PTM). The dependence of the NMOS & PMOS input equivalent circuits on applied biasing for 32–16nm gate lengths is simulated using SPICE circuit simulator.","PeriodicalId":438638,"journal":{"name":"2011 28th National Radio Science Conference (NRSC)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134294989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0