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whitepaper The detection strategy usually denoted optimal multiuser detection is equivalent to the solution of a (0, 1)-constrained maximum-likelihood (ML) problem, a problem which is known to be NP-hard. In contrast, the unconstrained ML problem can be...
[10 Apr 2008]
whitepaper In the wireless indoor environment, the channel may vary slowly as users and the interferers may move at slow speeds. A frequency-hopped code-division multiple-access system can adapt to the different interference levels in hopping patterns and...
[10 Apr 2008]
whitepaper After a number of false dawns of alternative wireless broad band technologies outside the main stream focus of UMTS / W-CDMA / 3G, there has been growing debate in the telecom industry of whether a new generation of wireless technologies like...
[10 Apr 2008]
whitepaper QUALCOMM Incorporated is recognized as the pioneer of CDMA digital wireless communications, products and technologies. QUALCOMM wanted a toolkit to use with a future version of Eudora Pro Email 4.0. As Eudora Pro software is based on Microsoft...
[10 Apr 2008]
whitepaper Technologies including PDC, cdmaOne (IS-95), TDMA (IS-54, IS-136), GSM, GPRS, EDGE, cdma2000 (IS-2000), cdma2000 1xEV-DO (IS-856), and W-CDMA (UMTS FDD) are discussed. This paper provides a high level overview of 2G and 3G wireless cellular...
[10 Apr 2008]
whitepaper With one BREW application and ALLTELL's 3G CDMA network, AMES has moved from a paper-based organization to a fully networked and wirelessly enabled organization. The City of Alliance Municipal Electric System (AMES) department distributes...
[10 Apr 2008]
News The Cyber Defence Management Authority (CDMA) will co-ordinate cyber defence among Nato allies after its formation was backed by members at the Nato summit in Bucharest last week. The Brussels-based CDMA will strengthen nation states cyber defences...
[08 Apr 2008]
News Greg Raleigh, vice president of product management for Qualcomm CDMA Technologies, said: "The Gobi solution enables enterprise users and consumers with the freedom of being untethered from wi-fi hotspots and connecting to the internet using...
[07 Apr 2008]
whitepaper In systems using Code-Division Multiple Access (CDMA), user capacity is enhanced by using soft handoff. This paper examines the effect of soft handoff on the uplink user capacity of a CDMA system consisting of a single macrocell in which a single...
[24 Mar 2008]
whitepaper Modern CDMA wireless channels support multiple transmission rates, which can be dynamically assigned to users based on traffic demand. However, in practice, assignment of high rate channels comes with the penalty of increased power as well as...
[28 Feb 2008]
whitepaper As mobile devices grow more powerful and diverse in the applications they run, it becomes increasingly desirable to give them some independence in scheduling their transmissions. The latest release of the CDMA2000 1xEV-DO system incorporates a...
[28 Feb 2008]
News For those of you who are old enough and who have followed our industry for long enough, you know the old debates around TDMA and CDMA and GSM - they were not particularly productive debates to have in the end.
[22 Feb 2008]
whitepaper Wireless technology is a broad reaching term that can signify Wireless Local Area, (WLAN or Wi-Fi); Wireless Wide Area (WWAN), such as CDMA or GRPS; Radio Frequency IDentification (RFID); or personal area networking technologies such as Bluetooth.
[11 Feb 2008]
News Malm said handsets with the ability to draw location information from the US-controlled satellite system were currently most common in those areas where phones are based on CDMA technology, such as the US.
[16 Jan 2008]
whitepaper In CDMA cellular networks, the soft handoff technique allows a mobile host to communicate with multiple base stations simultaneously, improving the transmission quality of the wireless channel and avoiding disconnection upon to base station...
[14 Jan 2008]
whitepaper The company wanted to conduct end-to-end System testing of a Packet Core CDMA Radio Network Controller (RNC). The challenge was to conduct the complete Real network end-to-end testing, including the Regression and Backward Compatibility testing for...
[14 Jan 2008]
whitepaper This white paper attempts to address the concept of Authentication and Encryption in CDMA systems and the usage of this feature in today's mobile telephony environment. Mobile usage has virtually penetrated every aspect of our daily lives from the...
[14 Jan 2008]
whitepaper This paper investigates the W-CDMA network design problem with reliability considerations. A design model that maximizes revenue net the cost of building and maintaining the network infrastructure to provide reliable communication subject to...
[11 Jan 2008]
whitepaper This paper investigates the long-lived TCP bulk throughput over the CDMA 1x EV-DO service that provides high-speed \always on" Internet connectivity in a wide-area mobile environment. Although the peak rates of downlink/uplink are specified as 2.4...
[08 Jan 2008]
whitepaper Some examples are 802.11, 802.16, MC-CDMA, Digital Video Broadcasting, Wireless USB and Wireless Firewire. Current and future communication schemes tend to use OFDM systems in order to provide high baud rates and less inter symbol interference.
[07 Jan 2008]
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