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The paper presents an efficient parallel timing synchronization algorithm structure, which is suitable for high speed communications demodulation system and easy to implement on FPGA platform. First, a new parallel timing synchronization structure is displayed. Wherein the proposed parallel structure make up of a feedback loop based on the farrow interpolation filter, Gardner algorithm and the numerically...
A novel high-voltage trench SOI LDMOS with ultra-low specific on-resistance (Ron,sp) is proposed and it features a Trench-Field-Enhanced (TFE) structure around the deep trench dielectric layer. The TFE structure consists of an L-shaped p-region, a symmetrical-L-shaped n-region and two high-doping p+ regions. In the OFF state, as the trench-field-enhanced effect (TFE-E), electric field in the bulk...
The emphasis in this paper is mainly on the point estimation of unknown parameters for uncertainty distribution. Firstly, principle of least squares and the least squares estimation are introduced. Secondly, by the k-th empirical moments of the expert's experimental data, we establish a method of moments to estimate the unknown parameters for uncertainty distribution. Finally, a moment estimation...
In this paper, we study the existence of non-collision periodic solutions for third-order singular dynamical systems. We consider the systems where the potential have a repulsive singularity at origin and do not need any kind of strong force condition. The proof is based on a nonlinear alternative principle of Leray-Schauder.
This paper presents the development of 110GHz monolithic low-noise amplifier (LNA) using 100 nm In0.52Al0.48As/In0.53Ga0.47As GaAs metamorphic high electron mobility transistors (MHEMTs) technology. The MHEMT technology features an extrinsic fT of 220GHz and an extrinsic transconduction gm,max of 940mS/mm. The LNA is consisted by 4 stages 2×20um gate width transistors. The amplifier demonstrates a...
Millimeter wave gain equalizers were designed using microstrip shorted SIR (Stepped Impedance Resonator) and waveguide resonator respectively. Traditionally, millimeter wave gain equalizer is composd of waveguide with electromagnetic wave absorber in resonator. However, putting the wave absorber into resonator directly is very hard to control the reflection coefficient and the max attenuation point...
A new digital Automatic gain control (AGC) circuit with two-stage gain adjustment is proposed in this paper. This AGC circuit is designed as part of an intermediate frequency (IF) processing circuit in the spectrum analyzer. The first stage controls the gain in 20 dB Steps and improves the measurement range of the RMS detector, while the second stage controls the gain in 3 dB Steps and gets a precise...
This paper presents a novel Delta Sigma Modulator (DSM) in form of MASH 2-1-2, which can suppress the spurious tones in spectrum for all constant inputs with error feedback as dither. As a finite-state machine (FSM), DSM always outputs a periodic sequence (or cycle) with a constant input. However, the novel DSM was designed to break up the periodic cycles and suppress quantization noise occurred in...
The objective of this study is to develop an innovative close range digital photogrammetry (CRDP) system using the commercial digital SLR cameras to measure and reconstruct the 3D surface of prosthetics and orthotics. This paper describes the instrumentation, techniques and preliminary results of the proposed system. The technique works by taking pictures of the object from multiple view angles. The...
Our ability to create systems with large amount of hardware parallelism is exceeding the average software developer's ability to effectively program them. This is a problem that plagues our industry. Since the vast majority of the world's software developers are not parallel programming experts, making it easy to write, port, and debug applications with sufficient core and vector parallelism is essential...
An improved waveguide to microstrip probe transition based on LTCC (Low Temperature Co-fired Ceramic) technology is proposed at Ka-band. To widen the bandwidth of the transition, a matching structure beneath the probe is buried, which is formed by installing conducting ground stripes on different substrate layers connected by the staggered via side walls. The improved transition achieves over the...
In order to prevent particle swarm optimization from being trapped in local optima, a new vector called the weighted individual best position of the other particles is introduced. On the one hand, the behavior of each particle is not only influenced by its own best position and the global best position but also by the individual best positions of the others in the swarm. On the other hand, fitness...
Particle swarm optimization (PSO) is a method for tackling optimization functions. However, it is easily trapped into the local optimization when solving high-dimension functions. To overcome this shortcoming, a modified particle swarm optimization is proposed in this paper. In the proposed method, a crossover step is added to the standard PSO. The crossover is taken between each particle's individual...
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