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This paper presents the generation of optical carrier suppressed signal for RoF system. RoF refers to an analog transmission over fiber technology where light is modulated by radio frequency (RF) signal and transmitted over an optical fiber link to wireless access. Both optical carrier suppression and signal modulation are made by using a Dual-Drive Mach-Zehnder modulator (DD-MZM). Suppressed carrier modulation is achieved by biasing at the null point of DD-MZM. Optical carrier suppression improves the performance of RoF system such as link gain and noise figure (NF).In this research, a single RF at 2100 MHz having data rate of a 1 Gbps modulates the 1550.12 nm optical carrier in the DD-MZM. In this paper, the carrier suppression and performances of RoF system are investigated by theory and simulation. The various values of optical carrier suppression ratio can be obtained by adjusting the extinction ratio of the DD-MZM.
Planar inverted-F antennas are miniature designs that offer considerable versatility for both mobile and other wireless applications. The design is particularly suited for mobile devices.
1888 PressRelease - While the City of Chicago was selected for Cisco's Host City for the 2014 Internet of Things World Forum, Everywhere Wireless was engaged by Cisco to provide Internet connectivity to power the Forum and Wi-Fi infrastructure, which will be installed at the intersection of Michigan Avenue and Wacker Drive, where the Smart City Walking Tour will be held.
The most straightforward and most economical opportunities to consider when beginning out are laser-based systems that usually use a magnetic attached laser receiver on the machine with a grade lasers for advancement and grade. The laser receiver proposes both visible and audible indication for above, below and on grade location. These verified systems have been accessible for a many years and let machine operators of backhoes, skid steers, dozers and smaller excavators to distinguish precisely where grade and elevation is minus the use of a grade checker. Varying on the system components and machine type, these laser-based systems can be used for flat, slope and cross slope grade control. Furthermore some laser-based systems use an in-cab control box to deliver automatic control of the blade. Laser-based systems are normally very simple to set up, and need very little training. Moreover, some laser based 2D systems for mini excavators and backhoes use wireless sensors to measure
Wireless communication has become a part and parcel of the latest world of technology and all the topnotch ... Manual handling was necessary beforehand, but now reclosers can be ... This is the simplest way to improve the smart grid operation. .... Collect load data for better system planning.
http://www.wirelessnursecall.com/ | For many modern businesses, a wireless emergency call system can be an extremely advantageous decision. The following document will highlight some of the various industries that would benefit from implementing one of these systems.
Upgrading from a traditional lighting setup to a wirelessly controlled LED configuration can enhance your business/facility. For more information about LED lighting, call 800.613.DECO.
The City of Marion, Texas is a very small community, but like the bigger cities we too have our problems. There are many video recording systems out there which are phenomenal, but we prefer Revo America’s video recording system. The system is very user friendly, is easy to set up and the infrared cameras have a very clear picture quality without those annoying lines which are seen in some recorded video.