"Universal Mobile Telecommunications System (UMTS)/High Speed Packet Access (HSPA) technology and its evolution to beyond Third Generation (3G) will compete with any and all mobile wireless technologies available today and in the future. Building on the phenomenal success of Global System for Mobile Communications (GSM), the GSM/UMTS ecosystem, unmatched by any other mobile wireless technology and possibly unmatched by any other communication technology ever, is not just a future dream. It is here now. UMTS/HSPA has many key technical and business advantages over other mobile wireless technologies. Whereas other wireless technologies show great potential on paper, UMTS today has global commercial deployments providing customers mobile broadband service. Operators worldwide are now deploying High Speed Downlink Packet Access (HSDPA), one of the most powerful cellular-data technologies ever developed...This paper begins with an overview of the market, looking at adoption of services and deployment of GSM-UMTS technologies. It then explains the capabilities and workings of the different technologies, including GPRS, EDGE, WCDMA2, HSPA, HSPA Evolution and LTE..."
If you've been looking for a very technical discussion on wireless data technology, especially, but not limited to, the GSM (GPRS/EDGE/UMTS/HSDPA) ecosystem, this is a in-depth (~76 page) report on the subject, giving a comprehensive top-to-bottom view on everything from basic methodologies to spectral efficiency. If you're anywhere from a wireless enthusiast to an electrical engineer, you may very well find it of interest. (Warning: PDF link.)
Mobile Broadband/3G Americas Technical Article
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