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In this paper, an efficient approach, named unitary matrix pencil method, is presented for pattern synthesis of sparse linear arrays. An equivalent real-valued matrix pencil can be achieved to determine the relation between element positions and new generalized eigenvalues through using the unitary transformation for the Hankel matrix with the sampled pattern data. The proposed method increases up...
In this study, the magnetic bearing is of hybrid type, with passive axial magnetic bearings (PMBs) and active radial magnetic bearing (AMBs), as well as Fig. 1 and Fig. 2 is the configuration of the ring-type flywheel battery prototype which is studied in this paper. Other than 5-DOF magnetic bearings, a built-in motor/generator will be installed in middle of the system. In such configuration, hybrid...
People rarely put in their papers the things that didn't work, the mistakes they made, and how they found out what went wrong. Such confessions can help others learn how to avoid similar mistakes. Twenty-six confessions were collected to form the bulk of this paper. Themes that arise are errors that result from not understanding the limitations of simulation tools in modeling physical reality, chip...
Source/Drain Reliability issues in a floating gate (FG) NAND string with different junction dosages are investigated. A lighter junction dosage gets better sub-threshold swing (SS) and helps the shrinkage of device channel length. However, some drawbacks, such as worse current fluctuation and abnormal self-boosting (SB), can be observed as the side effects. Charge pumping technique is applied to identify...
This paper experimentally demonstrates the feasibility of a 2 × 2 MIMO optical communication system based on mode group diversion multiplexing in the presence of strong mode crosstalk over 250m GI-MMF. The parallel signal detection and processing are realized through the use of PD array.
A novel resistive memory with the TiN/Ti/HfOx/TiN stack is proposed and fully integrated with 0.18 μm CMOS technology. The excellent memory performances such as low operation current (down to 25 μA), low operation voltage (<;1.5 V), high ON/OFF resistance ratio (above 100), and fast switching speed (10 ns) have been demonstrated for this ReRAM. Moreover, the device exhibits excellent scalability...
A numerical scheme of computing the reflection coefficient and transmission coefficient of the finite and arbitraried shaped frequency selective surfaces (FSS) is proposed. The volume-surface integral equation (VSIE) sovler in conjunction with the parallel multilevel fast multipole method (MLFMM) is applied to calculate the transmission and reflection coefficient of two typical finite size frequency...
A vertical channel SONOS memory, which is compatible with current CMOS process and has four physical storage nodes per unit area, is fabricated and electrically evaluated. Comparing with a planar device, the array cell tuning is much easier since the channel length is no longer limited by array area. After reviewing key performances including program/erase (P/E) speeds, second bit effect, program...
This paper investigates the effect of different array geometries on the performance of the turbo coding assisted beamforming uplink. More specifically, we focus on the maximum achievable rate as a measure of the system performance, which is calculated with the aid of EXIT chart analysis. Our performance results recorded for K = 4 uplink receiver antenna elements at the Base Station (BS) supporting...
We propose a semi-blind adaptive beamforming approach for wireless systems that employ high-throughput quadrature amplitude modulation signalling schemes. A minimum number of training symbols, equal to the number of receive antenna-array's elements, are first utilised to provide a rough initial least squares estimate of the beamformer's weight vector. A concurrent constant modulus algorithm and soft...
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