نتایج جستجو برای: dmt phase shifter
تعداد نتایج: 600912 فیلتر نتایج به سال:
This letter describes an analog phase shifter (PS) able to provide a continuously tunable phase shift up to 180° by using a single all-pass unit cell. The proposed topology is compact and easy to implement, and brings an interesting compromise between phase variation, insertion and return losses. Indeed, for a 7.5:1 tuning ratio of varactor capacitance, a phase shift variation of more than 186°...
Recently, discrete Fourier transform (DFT)-based discrete multitone modulation (DMT) systems have been widely applied to various applications. In this paper, we study a broader class of DMT systems using more general unitary matrices instead of DFT matrices. For this class, we will show how to design the optimal DMT systems over frequency-selective channels with colored noise. In addition, asym...
Barrel Shifter plays an important role in the data shifting and data rotation. It is having application in many areas. The Barrel Shifter is mainly use for the simplification of the data shifting. The Arithmetic and the Logical Shifters can also be replaced by the Barrel Shifter Because with the rotation of the data it also provide the application the data right, left shifting either arithmetic...
BACKGROUND Discontinuation of injectable disease-modifying therapy (DMT) for multiple sclerosis (MS) after a long period of relapse freedom is frequently considered, but data on post-cessation disease course are lacking. OBJECTIVES (1) To compare time to first relapse and disability progression among 'DMT stoppers' and propensity-score matched 'DMT stayers' in the MSBase Registry; (2) To iden...
A CMOS frequency-insensitive quadrature phase shifter is presented. Due to operation in current-mode, the proposed circuit provides a wide frequency response, a low supply voltage, low power consumption and electronic controllability. Thus, it is very suitable for use in portable and battery-powered equipments. The feature of the proposed circuit is that it can provide the quadrature signals wi...
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