Throughout the last decade, a trend towards the development of software-based Global Navigation Satellite System (GNSS) receivers has evolved in the fields of scientific research. Software-based GNSS receivers feature a high flexibility for the adaptation to several applications, serve as a development platform for studying new algorithms and techniques, and especially have the advantage of req...

The most prominent spatially correlated errors in GNSS observations are well known to be atmospheric effects. ionosphere and troposphere the two main layers of Atmosphere that cause delays observations. A linear combination dual-frequency data can used reduce ionospheric delay. Unlike delay, tropospheric delay cannot eliminated using same methods. is primarily associated with GPS. it causes GPS...

High data rates within the limited radio frequency (RF) spectrum is always desirable that leads to radios with capabilities beyond a single-input single-output (SISO) topology. Recently introduced wireless systems have adopted multiple-input multiple-output (MIMO) topologies that use two or more transmitters and two or more receivers to send data simultaneously over the same RF bandwidth. The p...

A transparentOptical-subTHz-Optical link providing record-high single line rates of 240 Gbit/s and 192 on a optical carrier over distances from 5 to 115 m is demonstrated. Besides direct mapping the 230 GHz subTHz-carrier frequency by means uni-traveling (UTC) photodiode, we demonstrate conversion data subTHz domain back plasmonic modulator. It shown that subTHz-to-optical upconversion c...

Precise (sub-meter level) real-time navigation using a space-capable single-frequency global positioning system (GPS) receiver and ultra-rapid (real-time) ephemerides from the international global navigation satellite systems service is proposed for low-Earth-orbiting (LEO) satellites. The C/A code and L1 carrier phase measurements are combined and single-differenced to eliminate first-order io...

In present scenario, there is a need of improving our future wireless communication system, since system suffers from the problem of low spectral efficiency, low link reliability, medium data rates and the problem of frequency selective fading. This problem can be solved by using OFDM signals. The advantage of OFDM is that it has the capacity of overcoming the frequency selective fading problem...

| Combined spatial and time-frequency signatures of signal arrivals at a multi-sensor array are used for nonstationary interference suppression in direct-sequence spread-spectrum (DS/SS) communications. With random PN spreading code and deterministic nonstationary interferers, the use of antenna arrays o ers increased DS/SS signal dimensionality relative to the interferers. Interference mitigat...

In this paper, we test the performance of single and dual frequency GPS and Galileo GNSS receivers in terms of satellite-receiver range estimation. In particular, we focus on the e ects caused by ionosphere and multipath propagation. Therefore, the available pseudoranges are assumed to be contaminated with first-order ionospheric delay and measurement errors produced in the code tracking stage....