ROF technology, FTTH in the optical wireless network fusion-FTTH, optical networks, WiMAX-communicat

ROF technology, FTTH in the optical wireless network fusion-FTTH, optical networks, WiMAX-communicat
ROF technology, FTTH in the optical wireless network fusion-FTTH, optical networks, WiMAX-communicat ROF technology, FTTH in the optical wireless network fusion-FTTH, optical networks, WiMAX-communicat Present, based on PON technology, FTTH in some pilot cities in full swing at the same time, WiMAX also sprung up everywhere, and smooth as 3G Standard 1. In the backbone optical network has become saturated, the access network in the field of large market share would be a major operator competing investment. Optical access and wireless access have their own advantages, respectively, optical fiber has low loss, high bandwidth, EMI characteristics, and wireless access is available to users everywhere in the convenient and efficient service and eliminates the need for laying The high cost of fiber, so that people wanted to be able to use a technology to integrate wired and wireless access. RadioOverFiber (ROF) technology is should this need arise, and become more and more people research focus. 2008 began, the restructuring of the domestic telecommunications industry become the focus of discussion on people have predicted that the restructuring plan, the future operator will have their own fixed and mobile networks, and two operations concurrently, for the cost of minimum, network optimization, operating companies will select networks. In addition, from the market point of view, there is survey research organizations, in the survey, some 60. 6% of that in the next 5 years were seen in the scenario will be the integration of wireless and wired (FMC), most users will have more than one mode phone, and through the most suitable network (can be fixed, can also be a wireless network) to make calls. Therefore, from the technical, policy or market-driven perspective, integration will become the main theme of the telecommunications industry in the future and the inevitable trend of technology will become more integrated, the network will become more integrated, the business will be coming together, ROF technology In the future network convergence will play a big role. 1. ROF technology introduced ROF technology is to be high-speed high-capacity wireless Communicate Needs, new development up to optical fiber communication and wireless communication with wireless access technologies combined. ROF system using optical fiber as the base station (BS) and Central Station (CS) transmission link between the direct use of optical carrier to transmit RF signals. Only play a role in fiber optic transmission, switching, control and signal regeneration are concentrated in the central station, the base station only to realize optical switching, so you can focus on the complex and expensive equipment to the central site, multiple remote base stations to share these facilities, base stations to reduce power consumption and cost. Optical transmission radio frequency (or wave) signals to improve the wireless bandwidth, but Antenna In the atmosphere after launch the loss will increase, so the cellular structure required changes to the plot slightly, but a simplified base station structure is conducive to increasing the number of base stations to reduce the cellular coverage area, allowing more flexible network, the atmosphere over the wireless signals The decline will be reduced; In addition, the use of optical fiber transmission link, with low loss, high bandwidth and to prevent electromagnetic interference characteristics. It is these advantages, making the ROF technology in future wireless broadband communications, satellite communications, and the areas of intelligent transportation system has broad application prospects. 2. ROF technology status of current researchIn the ROF system, due to optical carrier carrying an analog microwave signal, with the traditional digital fiber optic transmission link than the performance of their systems and optical devices link their dispersion, nonlinear effects, etc. have a more demanding. Currently, the ROF Technology is still focused on physical layer, such as millimeter wave based on microwave photonics signal source to produce, light modulator, the filter characteristics and the improvements in optical fiber link dispersion control, and optical carrier base station re-utilization of system design and optimization. We are high quality suppliers, our products such as China GSM Dialers, Wired Smoke Detectors for oversee buyer. To know more, please visits GSM Alarm Systems. Google+John on Semantic Search