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The time reference scanning beam Microwave Landing System (MLS) is an air derived system, whereby airborne receivers decode continuous ground system data to provide guidance information indicating vertical and lateral displacement from a selected flight profile. It is expected that MLS, within ten years, will replace the Instrument Landing System (ILS) as a precision landing aids to aircrafts in most...
Developing models that capture the spatial characteristics of wireless channels is vital for studying the performance of wireless communication systems particularly that exploit spatial processing receivers. In this paper, we propose an extension of the 2D model presented in [1] to the 3D case. We derive the joint cumulative distribution function (CDF) and the joint probability density function (pdf)...
Fountain codes are erasure correcting codes realizing reliable communication on multicasting. In a previous work, we proposed a fountain code, named zigzag decodable fountain (ZDF) code, and showed that the ZDF code outperforms Raptor codes in term of the decoding performance. However, the conventional decoding algorithm for the ZDF code, which is regarded as a combination of packet-wise peeling algorithm...
In today's world the most common wireless technology uses radio frequency(RF), Microwave, infrared(IR) for data communication. But ultrasonic can be a promising alternative method as unlike RF it does not have any biological effect that results in heating of human tissue. The development of aeronautical single channel and multichannel ultrasonic data communication system is discussed in this paper...
This paper employs the use of active and passive radars. The coordinates of the target are determined by the means of quadratic functionality. The computations are carried out in such a way that the approximate location of target is determined.
In this paper, an empirical propagation model for indoor corridor at 5 GHz based on ray tracing dataset has been proposed. The model can predict the line-of-sight (LOS) and non-line-of-sight (NLOS) path loss characteristics for indoor corridor with T-junction using distances from the junction to the transmitter and receiver, while taking into account the width of the corridor.
We present a power transmitter coil design for millimeter-size small wireless sensor nodes to improve coupling coefficient. We also develop a wireless power transfer (WPT) system using resonant coupling to achieve higher power transfer efficiency. Simulation results demonstrated that the power transfer efficiency was 60% at z-gap = 10 mm. Compared with conventional system, coupling coefficient was...
A radar-altimeter system is a critical flight equipment, and must be reliable, and robust. Moreover, its operating limits have to be well known. The characterizations of this kind of product are usually done during expensive instrumented flight, which are not quite reliable in term of reproducibility. For these reasons, the aim of the work presented here is to propose a real time test bed, able to...
Cognitive Radio Network (CRN) is a promising wireless communication solution whereby radio resources are automatically varied to optimize performance in the changing wireless environment. Our work focuses on distributed CRN with rational and independent users. The eventual state often reached in such a system is Nash Equilibrium (NE); multiple NEs with different performance exists. In this paper we...
We have developed a new propagation modeling technique for characterizing and geolocating ionospheric irregularities using radio occultation observations of amplitude scintillation. The approach taken is to solve an inverse problem for the propagation of radio waves through a phase changing screen. Referred to as Irregularity Parameter Estimation (IPE), this inverse technique infers the irregularity...
The hopeful technique Massive MIMO is provided to increase the data rates of mobile communication, by arranging antennas to hundreds of the base stations which is the most promising solution for the fifth generation of cellular communication network. In order to cope with the huge demands of communications in the network it has been found that it is useful to have multiple receivers served in the...
This work proposes low noise amplifier (LNA) and local oscillator (LO) co-design considerations for low intermediate frequency (IF) receivers (RX) in the Medical Device Radiocommunication (MedRadio) band (401-406 MHz), which is used for biomedical applications. Supported with the analysis, proposed considerations are the experimental outcomes of measurements and characterization of fabricated ICs,...
Implantable medical devices can benefit greatly from wireless inductive energy supplying. At the same time, there is no universal approach to the design procedure of inductive powering unit. This paper covers two possible operation modes of the unit. Each mode has its own specific features and area of applicability. Parametric sweeps of the system output power and energy transfer efficiency are depicted...
In this paper, the impact of an uncorrected sampling frequency offset (SFO) on the frame error rate (FER) of a PRIME 1.4 system is studied. It is also discussed the need of new algorithms to estimate and correct that SFO or to adopt more simpler strategies that mitigate somehow this problem, like applying in the receiver a shift to the fast-Fourier transform window towards the cyclic prefix part of...
In this paper, we study the achievable performance of information decoding and harvested power in Simultaneous Wireless Information and Power Transfer (SWIPT) millimeter wave (mmWave) cellular networks. In particular, by modeling the Base Stations (BSs) as points of a Poisson Point Process (PPP) and by applying Maximum Ratio Transmission (MRT) and Maximum Ratio Combining (MRC) at the BSs and Mobile...
Channel mismatch has become a serious limit to further improve the anti-jamming performance on satellite navigation antenna arrays receivers. Consistency degree of each channel could directly determine the anti-jamming performance. In order to analyze and confirm the channel consistency indexes, this paper analyzes the impact of channel mismatch on interference cancellation ratio (ICR), firstly. According...
This paper provides a method to evaluate the performance of contention resolution process existing in the uplink visible light communications. In such a system, multiple vehicles share a common communication channel to convey data packets to receivers mounted in the road lamps along urban streets. A finite state Markov chain model is established to investigate the steady state probability distribution...
Global navigation satellite system “GNSS” is defined as a set of positioning satellite systems offering the possibility for a receiver to determine its position at any time and in any place on earth. The accuracy of this calculation, which is extremely solicited, is disputed by the phenomenon of multipath. for this purpose, several multipath mitigation techniques have been proposed in the literature...
A new technique known as Hybrid Tone Reservation (HTR) for Peak-to-Average Power Ratio (PAPR) reduction in OFDM systems has been proposed. It is shown that this new technique, based on the inclusion of the Guard Interval (GI) signal into the well-known Tone Reservation using Null-Subcarriers (TRNS) technique can significantly increase the PAPR reduction gain. In this paper, we propose to extend the...
The aim of this paper is to investigate an innovative carrier tracking scheme capable of maintaining the robustness characteristics typical of the Kalman filter tracking loop architecture and, at the same time, reducing the computational load due to the burdensome operations needed by the legacy Kalman filter implementation. Computationally speaking, the heaviest stage of the Kalman filter scheme...
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