A virtual lab system is the simulation of real devices and experiments usingcomputer and network technology. It can make users do experiments easily, observe experimentphenomena and results through the remote terminal...A virtual lab system is the simulation of real devices and experiments usingcomputer and network technology. It can make users do experiments easily, observe experimentphenomena and results through the remote terminal. Consequently, users can get final results toverify relative theory. The article analyses the features of virtual lab systems. A real virtual labsystem named 'Multimedia Virtual Lab for Digital Circuit Logic Design (MVLDCLD)' which has beendeveloped by the authors and their group is also presented.展开更多
The Constant Modulus Algorithm (CMA) enjoys widespread popularity as methodsfor blind beamform-ing and equalization of communication signals, CMA is straightforward toimplement, robust, and computationally of moderate...The Constant Modulus Algorithm (CMA) enjoys widespread popularity as methodsfor blind beamform-ing and equalization of communication signals, CMA is straightforward toimplement, robust, and computationally of moderate complexity. Furthermore, it is insensitive toarray imperfection. In an environment containing multiple constant modulus signals, the signalextracted by CMA depends on the relative power of the incident signals. According previous works,the CMA is prone to capture the strongest Constant Modulus (CM) signal at the output of the array.In this paper, we show that the weak CM signal could be recovered by CMA_(1-2) and CMA_(2-1) whensetting special step-size. Simulation examples confirm our remarks.展开更多
Double Data Rate Synchronously Dynamic RAM(DDR-SDRAM)is a kind ofnew high-capacity and high-speed ram chip. The article describes itsworking features. Implementation of the DDR SDRAM controller isanalyzed and some det...Double Data Rate Synchronously Dynamic RAM(DDR-SDRAM)is a kind ofnew high-capacity and high-speed ram chip. The article describes itsworking features. Implementation of the DDR SDRAM controller isanalyzed and some details are also given.展开更多
文摘A virtual lab system is the simulation of real devices and experiments usingcomputer and network technology. It can make users do experiments easily, observe experimentphenomena and results through the remote terminal. Consequently, users can get final results toverify relative theory. The article analyses the features of virtual lab systems. A real virtual labsystem named 'Multimedia Virtual Lab for Digital Circuit Logic Design (MVLDCLD)' which has beendeveloped by the authors and their group is also presented.
文摘The Constant Modulus Algorithm (CMA) enjoys widespread popularity as methodsfor blind beamform-ing and equalization of communication signals, CMA is straightforward toimplement, robust, and computationally of moderate complexity. Furthermore, it is insensitive toarray imperfection. In an environment containing multiple constant modulus signals, the signalextracted by CMA depends on the relative power of the incident signals. According previous works,the CMA is prone to capture the strongest Constant Modulus (CM) signal at the output of the array.In this paper, we show that the weak CM signal could be recovered by CMA_(1-2) and CMA_(2-1) whensetting special step-size. Simulation examples confirm our remarks.
文摘Double Data Rate Synchronously Dynamic RAM(DDR-SDRAM)is a kind ofnew high-capacity and high-speed ram chip. The article describes itsworking features. Implementation of the DDR SDRAM controller isanalyzed and some details are also given.
