详情

原文传递 900 MHZ WIRELESS TECHNOLOGY: THE EASY PATH TO HIGHER SPEEDS

题名：	900 MHZ WIRELESS TECHNOLOGY: THE EASY PATH TO HIGHER SPEEDS
正文语种：	eng
作者：	Ryan O'Connor
摘要：	For years, devices that communicated on the 900 MHz band using frequency hopping spread spectrum (FHSS) technology via serial or FSK connections dominated and made wireless in the traffic signal world possible. These devices were once state-of-the-art, providing a new level of connectivity and control. Needing infrastructure where physical cabling could not be quickly implemented or was simply not an option. Many of these deployments have now been out in the field for 20+ years. Like all things in life, needs have changed, and bandwidth requirements have increased. Today, the question is, how can existing infrastructure be utilized and adapt to more demanding applications while keeping expenses at a minimum? There are a few options for upgrading this type of infrastructure, but they come with some pros and cons. First, we could completely replace the existing system with higher bandwidth devices such as broadband radios operating at a higher frequency. Upgrading existing infrastructure would require replacing all the equipment along with, at least, a likely partial shutdown of the intersection.
出版年：	2021
期刊名称：	IMSA Journal
期：	Mar./Apr.