In this paper, a novel dual-band bandpass filter (BPF) based on a single short-ended dual-mode resonator (SEDMR) is presented. According to the voltage distribution of the resonator, two pairs of loaded open stubs, inside and outside of the resonator, are utilized to tune the center frequency and the external quality factor of the first passband respectively, while there is no influence on the ...

GPS is a CDMA system using DSSS, and the length of the C/A cod used by GPS L1 band civil signal is 1023chips. As the Cross-Correlation peak between the C/A codes is not zero, it will degrade the performance of the detection probability. Detection of weak signal is becoming important in many applications like GPS remote sensing etc. Cross-Correlation caused by GPS Gold codes are representing sig...

The first space-based GPS augmentation systems were implemented using the L-band geostationary transponders launched on the Inmarsat-3 satellites. The Ground Uplink Station (GUS) hardware and software, which enables these “bent-pipe” transponders to broadcast pseudo-GPS signals, was developed by NAVSYS. The Ground Uplink Station equipment allows the Inmarsat-3 GPS augmentation signals to be pre...

j u l y / a u g u s t 2 0 1 0 www.insidegnss.com While the GNSS community at large looks forward to the addition of any new generation of navigation satellites, the first Block IIF satellite — launched in May 2010 and designated space vehicle number (SVN) 62 — marks an especially important step forward for the aviation community. Non-aviation applications may take advantage of GNSS receivers th...

This paper presents new findings about radio interference threat in L1/E1 frequency band of GPS and coming Galileo. The results of a dedicated interference measurement campaign are presented. One type of the interference encountered during the campaign on several locations inside Germany has been modelled and the impact of this interference on massmarket GPS/Galileo L1 receivers has been assess...

In this paper, a novel method to design Quad-band stop frequency selective surface (FSS) is proposed shield medical/non-medical devices from electromagnetic radiation of wifi/Bluetooth, GPS,1G, 2G, 3G, 4G and 5G frequencies. The device can also be used in security surveillance protect them attack. FSS unit cell consists convoluted structures on FR4 substrate. study was performed by designing in...

In this paper, a compact two-shape slot microstrip antenna is proposed for global positioning system (GPS) satellite application. The designed with FR 4 substrate height of 1.6 mm, dielectric constant εr 4.3 within size 56 x mm2 area. design parameters are optimized to achieve good performance. At the optimum setting parameters, shows characteristics cover L1 band 1,575.42 MHz, ± 12 MHz frequen...

We discuss GPS receiver architectures based on software defined radio techniques. The reason for doing this is to obtain a reconfigurable receiver with a wide range of applications. There is a need for a unified platform that will allow receiver development and testing for various applications; this speeds the design process and reduces the costs. With the current functionality of the GPS const...

Recent developments in Synthetic Aperture Radar (SAR) technologies have shown their potential for assessing and quantifying above-ground biomass (AGB) at landscape levels in different biomes. This paper examines the application of full polarimetric data to retrieve information related to potential woody biomass in sparse communal savanna woodlands in southern Africa using the Advanced Land Obse...