The Intelligent Transportation System (ITS) relies heavily on data communications systems to link eld equipment such as traac sensors, changeable message signs and incident response vehicles with traac operations centers. This paper has two main purposes. The rst is to present a review of data communications concepts essential in the design of wireless modems for the ITS 220 MHz spectral alloca...

The Wide-Area Linear Optical Polarimeter (WALOP)-South instrument will be mounted on the 1-m South African Astronomical Observatory telescope in Africa as part of Polar-Areas Stellar Imaging Polarization High Accuracy Experiment (PASIPHAE) program to carry out a linear imaging polarization survey Galactic polar regions optical band. Designed achieve polarimetric sensitivity 0.05% across 35 × ar...

In this paper, the problem of SIR-based power control in narrowband wireless systems is revisited. Results on feasibility conditions of SIR-based power control are given. We stated and proved the relations between the achievable SIR and the link gain matrix in a narrowband system. Taking into account the orders of the realistic values for the problem quantities and assuming the desired SIR is c...

This paper presents a novel narrowband microstrip patch antenna for radar application. The proposed antenna consists of rectangular radiating patch which provides a narrowband behavior and relatively good impedance matching working in the band of 3-12 GHz. A parametric study is performed on three different antenna structures. The measured results give three narrow band stable signal transmissio...

Application of the Transverse Chirped Bragg Grating (TCBG a reflecting volume Bragg grating with continuously variable resonant wavelength across the aperture) for the narrowband tunable ring-cavity fiber laser is presented. The main advantage of the use of TCBG is that its linear translation allows continuous tuning of emission wavelength within 5-10 nm band. Yb doped fiber laser operating in ...

This paper discusses acoustic feedback effects in active noise control (ANC) and proposes an improved performance online adaptive feedback canceller (AFC). The online AFC is ineffective if the noise input is narrowband. The proposed method uses the prewhitening filter in the weight adaptation path of both AFC and ANC. The computer simulations show that the proposed method of ANC with online AFC...

Narrowband Internet of Things (NB-IoT) is a new cellular technology introduced in 3GPP Release 13 for providing wide-area coverage for the Internet of Things (IoT). This article provides an overview of the air interface of NB-IoT. It describes how NB-IoT addresses key IoT requirements such as deployment flexibility, low device complexity, long battery life time, support of massive number of dev...

Narrowband and partial-band interference can severely degrade the performance of GPS receivers. The use of digital signal processing in a receiver has been shown to provide protection against this type of interference in communications systems and has been proposed for application in future GPS systems. This paper discusses the measured effects of narrowband interference suppression on GPS rece...

Performance of the conventional narrowband active noise control (NANC) system may degrade severely when the uncorrelated narrowband disturbance noise is present in the system. In this paper, we propose a new hybrid NANC system capable of reducing the primary noise and the uncorrelated disturbance simultaneously. First, some simple analysis is used to show why the NANC system may indicate poor p...