Browsing by Keywords "Bandwidth"
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100GHz resonant cavity enhanced Schottky photodiodes
(Institute of Electrical and Electronics Engineers, 1998)Resonant cavity enhanced (RCE) photodiodes are promising candidates for applications in optical communications and interconnects where ultrafast highefficiency detection is desirable. We have designed and fabricated RCE ... 
45 GHz bandwidthefficiency resonant cavity enhanced ITOSchottky photodiodes
(Optical Society of America, 2001)We demonstrated highperformance resonant cavity enhanced ITOSchottky photodiodes. We achieved a peak efficiency of 75% around 820 nm with a 3dB bandwidth of 60 GHz resulting in a bandwidthefficiency product of 45 GHz. 
Adaptive polyphase subband decomposition structures for image compression
(IEEE, 2000)Subband decomposition techniques have been extensively used for data coding and analysis. In most filter banks, the goal is to obtain subsampled signals corresponding to different spectral regions of the original data. ... 
Adaptive schemes for location update generation in execution locationdependent continuous queries
(Elsevier Inc., 200604)An important feature that is expected to be owned by today's mobile computing systems is the ability of processing locationdependent continuous queries on moving objects. The result of a locationdependent query depends ... 
An approach to manage connectionless services in connectionoriented networks
(IEEE (Institute of Electrical and Electronics Engineers), 1996)In this work we propose a pricing scheme which serves as an instrument for managing connectionless services in connectionoriented communication networks. The scheme is able to allocate network bandwidth in a Paretooptimal ... 
Bandwidth improvement in a cMUT array with mixed sized elements
(2005)A capacitive micromachined ultrasonic transducer (cMUT) is typically fabricated by concatenation of several cMUT cells with identical physical dimensions. If the membrane thickness is kept fixed, the radius of the cMUT ... 
Bandwidth selection for kernel density estimation using fourier domain constraints
(Institution of Engineering and Technology, 2016)Kernel density estimation (KDE) is widelyused for nonparametric estimation of an underlying density from data. The performance of KDE is mainly dependent on the bandwidth parameter of the kernel. This study presents an ... 
Bandwidth, power and noise considerations in airborne cMUTs
(2009)Capacitive micromachined ultrasonic transducers (cMUTs) offer wider bandwidth in air due to their low mechanical impedances. The impedance mismatch between the air and transducer decreases with the smaller device dimensions ... 
Broadband quarterwave plates at nearinfrared using highcontrast gratings
(2013)In this paper, we report the theoretical and experimental possibility of achieving a quarterwave plate regime by using highcontrast gratings, which are binary, vertical, periodic, nearwavelength, and twodimensional ... 
Capacity bounds for an ultrawideband channel model
(2004)There is an ongoing effort by the IEEE 802.15.3a subcommittee to reach a UWB personal area network standard. We estimate the achievable rates for such networks using a channel model specified by the same group. The analysis ... 
Characterization and imaging with lamb wave lens at gigahertz frequencies
(IEEE, 199410)Lamb wave lenses with conical refracting surfaces are fabricated for use at 400 MHz and 1 GHz. The conical surfaces are ground and polished with mechanical means and they are sufficiently smooth for the frequencies of ... 
Compressive sensingbased robust offthegrid stretch processing
(Institution of Engineering and Technology, 2017)Classical stretch processing (SP) obtains high range resolution by compressing large bandwidth signals with narrowband receivers using lower rate analoguetodigital converters. SP achieves the resolution of the large ... 
Deepcollapse operation of capacitive micromachined ultrasonic transducers
(IEEE, 2011)Capacitive micromachined ultrasonic transducers (CMUTs) have been introduced as a promising technology for ultrasound imaging and therapeutic ultrasound applications which require high transmitted pressures for increased ... 
Design charts to maximize the gainbandwidth product of capacitive micromachined ultrasonic transducers
(2005)In this work we define a performance measure for capacitive micromachined ultrasonic transducers (cMUT) in the form of a gainbandwidth product to investigate the conditions that optimize the gain and bandwidth with respect ... 
The design of a wideband and widebeam piston transducer in a finite closed circular baffle
(2008)The design of a high power piezoelectric underwater transducer operating at frequency range 40 kHz80 kHz with acoustic power capability in excess of 250W is described. The transducer consists of two backtoback elements. ... 
Design, fabrication and characterization of highperformance solarblind AlGaN photodetectors
(2005)Design, fabrication, and characterization of highperformance AlxGalxNbased photodetectors for solarblind applications are reported. AlxGalxN heterostructures were designed for Schottky, pin, and metalsemiconductormetal ... 
Designing efficient CMUT cells for airborne applications
(IEEE Computer Society, 2014)In this work, we study airborne CMUT cells with vacuum gap where silicon plate is operated both in elastically linear and nonlinear regimes. We report the results of a new mode of operation where the plate center swings ... 
Digital computation of the fractional Fourier transform
(Institute of Electrical and Electronics Engineers, 199609)An algorithm for efficient and accurate computation of the fractional Fourier transform is given. For signals with timebandwidth product N, the presented algorithm computes the fractional transform in O(NlogN) time. A ... 
Discriminative finegrained mixing for adaptive compression of data streams
(Institute of Electrical and Electronics Engineers, 2014)This paper introduces an adaptive compression algorithm for transfer of data streams across operators in stream processing systems. The algorithm is adaptive in the sense that it can adjust the amount of compression applied ... 
Distributed construction and maintenance of bandwidthefficient bluetooth scatternets
(2005)Bluetooth networks can be constructed as piconets or scatternets depending on the number of nodes in the network. Although piconet construction is a welldefined process specified in Bluetooth standards, scatternet ...