The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
We experimentally demonstrate visible-light co ding/de co ding utilizing hexadecimal vector beam array for parallel communication link. The hexadecimal base mode is investigated and 128-ary is also available. We present vector beam array carrying 4×6/6×8/12×16 hexadecimal numbers and error-free data stream transmission performance is also demonstrated.
We present a novel free-space communication link using orbital angular momentum (OAM) array encoding/decoding. By employing an array with 4 spatial locations each with 5 possible OAM beams, we experimentally demonstrate a high base OAM encoding/decoding with 625 states for free-space optical communications.
A 330,000 gate field programmable gate array (FPGA) VS12C fabricated on 0.2μm full-depletion silicon-on-insulator (FD SOI) process is presented and the test results indicate this chip has the lower power and higher tolerance to radiation compared with Xilinx radiation-hardened XQVR300 chip implemented on 0.22μm epitaxial silicon. This paper demonstrates the benefit of the FD SOI technology on low...
According to the problem of low efficiency of the network transmission system based on TCP in the case of large time delay and loss rate, this paper proposes an efficient method for network transmission system based on digital fountain. The principle of the digital fountain is described and a new system is designed and implemented on the basis of Raptor Codes and UDP. The results are given and indicate...
The paper proposes a new implementation platform for parallel FFT called multi-core DSPs, which uses Serial RapidIO (SRIO) to achieve DSP-to-DSP communication and utilizes Enhanced Direct Memory Access (EDMA3) to realize core-to-core communication. The simulation results show this architecture not only effectively solves the bottleneck of system interconnection, but also greatly improves executing...
Low aspect-ratio Si nano-hemisphere array surface texturing compatible to thin film based solar cells is studied systematically for performance improvement. The light reflection can be significantly suppressed through varying the nano-hemisphere dimensions due to the spatial effective refractive index modulation. Owing to the excellent light trapping and also the nature of low aspect ratio (critical...
We present a 2.3-Tbit/s network switching element by exploiting double-pass LCoS technology and bidirectional nonlinear effects inside a single HNLF. We demonstrate 2.3-Tbit/s grooming switch with simultaneous functions of add/drop, data exchange, and power equalization, for 23-channel 100-Gbit/s RZ-DQPSK signals.
When we use the multiple beam antenna to estimate the direction of arrival (DOA) by using the multiple signal classification (MUSIC) algorithm, the uncertainty element's amplitude and phase will effect the DOA estimation performance of the beam antenna. So a universal technique for self-calibration based on the minimize cost function is introduced. By minimize the cost function it can get the array...
Java reflection mechanism is an important technology for improving system flexibility and expandability, which makes the software has the ability of self-adaptive, it changes itself with the external environmental change so as to realize the dynamic evolution of the program. The concept and mechanism of reflection are introduced in this paper, and this paper present a Framework for Persistence Data...
A direct and more convenient method is introduced for the compensation of mutual coupling effect in a beam-forming array consisted of 16 parallel printed dipoles. The element antenna can be resized in the array environment to reduce the aberrance of the element??s input VSWR and provide a good matching with the power divider. By using of the full-wave EM field simulator-HFSS, some simulation of the...
A new method for amplitude-only optimization of circular planar slot array antennas is presented. In order to form a given three-dimensional antenna pattern for array antennas, variable metric algorithms, Davidon-Fletcher-Powell (DFP) and Broyden-Fletcher-Goldfarb-Shanno (BFGS) were jointly used to optimize the amplitude distribution of the current excitations. Thus, the optimized main lobe of the...
Conventional blind beamformers in DS-CDMA systems generally suffer from either unreliable convergence rate or signal cancellation in practical signal environment. In this paper, we propose a novel orthogonal projection scheme to extract spatial interference structure for the blind beamformer, which requires neither the direction of the desired signal nor the array geometry information. Exploiting...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.