TECHNOLOGY PAPERS

Stefan Brämberg, CTO, Ascom Wireless Solutions, regularly writes articles about trends in technology and communication.

Stefan Brämbergs biography

Stefan Brämberg has a Master of Science in Electrical Engineering from Chalmers University of Technology Gothenburg. Started his career as a test engineer at Ericsson where he stayed in different positions for 20 years, working with aircraft radar system, and radio base stations. Since 1997 Stefan has been responsible for the R&D department at Ascom Wireless Solutions and is now acting as CTO. During his time at Ascom the company has taken several large technology steps, analogue to DECT wireless technology, IP convergence and WiFi mobility to mention a few. Stefan is an appreciated speaker on technology topics and communication trends.

Technology Papers

	DECT Security The DECT standard has been the de facto voice mobility standard for almost two decades and is since a few years back now also growing in the US. Already at the initial design security was addressed and DECT and GSM shared the same design philosophy. Read More
	Indoor Positioning The topic of asset tracking and applications that need indoor positioning has been hot for almost a decade. The real breakthrough is yet to come but applications and systems are slowly expanding. Stefan Brämberg has had a look at the different methods and technologies and explains how the four different methods; Base station positioning, Sign post positioning, Field strength positioning and Time delay positioning work. Read More
	TETRA – Terrestrial Trunked Radio The TETRA (TErrestrial Trunked RAdio) standard is implemented in Europe and is spreading to other parts of the world. Read more
	CAT-IQ – ANOTHER PET IN THE FAMILY? CAT-iq stands for “Cordless Advanced Telephony internet and quality”. This standard is a proposal from the DECT Forum supported by ETSI to bring the DECT standard into the IP age. Read more
	WiMAX – An alternative to WIFI? WiMAX is nowadays frequently mentioned in media; but what is it really, and what importance will it have in relation to WiFi and IP-DECT? Read more
	IP for everything alreday today IP and internet is on all agendas today, most of us are already hooked users in one way or the other. But will everything run on IP soon? Read more
	SIP SIP is the first IP-telephony protocol that is endorsed and eventually backed up by both the telecom industry and the Internet community. The broad industry support and strong initiatives to achieve interoperability has led to an open de-facto standard for IP-based telephony systems. Read More
	Accelerated Life Test Portable devices are subjected to heavy wear and tear in normal use, especially in industrial and healthcare environments. It is of outmost importance to detect weak designs and early failure parts before they reach our customers. Read More
	INDOOR GSM WITH FEMTOCELL TECHNOLOGY We start to have a new buzz word in the telecom industry – femtocell. I will try to shed some light on the subject. “Femto” comes from the same prefix as micro (10-6) and nano (10-9) and means 10-15 but in this context should be interpreted as “very small”. Although the concept of femtocell can be applied to many different technologies, today it’s focused on 3G systems. Very small cells are in this context similar to the cell sizes that we se in DECT. Read More

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