To solve the problem that the traditional spectrum sensing can only obtain the limited information of primary user and the efficiency of spectrum usage is low, this paper proposes a spectrum situation scheme to obtain the interference distribution information of primary user in frequency and spatial domain. This scheme uses surface spline interpolation based on the information returned by a sma...

The alignment sensing and control scheme of the resonant sideband extraction interferometer is still an unsettled issue for the next-generation gravitational wave antennas. The issue is that it is difficult to extract separate error signals for all 12 angular degrees of freedom, which is mainly arising from the complexity of the optical system and cavity “degeneracy”. We have suggested a new se...

For a broadband-operated RSE interferometer, a simple and smart length sensing and control scheme was newly proposed. The sensing matrix could be diagonal, owing to a simple allocation of two RF modulations and to a macroscopic displacement of cavity mirrors, which cause a detuning of the RF modulation sidebands. In this article, the idea of the sensing scheme and an optimization of the relevan...

In this paper, we propose a two-stage spectrum sensing (SS) scheme in cognitive radio networks (CRN). First stage consists of multiple antennas (M) based energy detector (ED) with fixed single threshold (MA_ED_FT) and if required, second stage comprised of ED with adaptive double threshold (ADT) is invoked. Numerical results show that proposed scheme optimizes detection performance and outperfo...

A real-time three-dimensional (3D) object sensing and reconstruction scheme is presented that can be applied on any arbitrary corporeal shape. Operation is demonstrated on several calibrated objects. The system uses curvature sensors based upon in-line fiber Bragg gratings encapsulated in a low-temperature curing synthetic silicone. New methods to quantitatively evaluate the performance of a 3D...

Existing pointing systems like mouse, track ball and digital tablet track the movement in x-y co-ordinates. All these systems need a PC. Absolute Pen Position Encoding and Decoding Scheme presented in this paper tracks the absolute position of a pattern printed on a paper and also records the page number. Such system is a necessity in recording voluminous data and storing them on the computer. ...

In the conventional content-addressable memory (CAM), equal power is consumed to determine if a stored word is matched to a search word or mismatched, independent of the number of mismatched bits. This paper presents a match-line (ML) sensing scheme that allocates less power to match decisions involving a larger number of mismatched bits. Since the majority of CAM words are mismatched, this sch...