So, Who Needs ZigBee?
Nov 8, 2005
We're beginning to hear more and more about this wireless technology called ZigBee. We already have Bluetooth- and Wi-Fi-enabled devices, and WiMAX and Wireless USB proliferation are at the doorstep. Who needs another wireless standard?...
The challenges of testing MIMO
Nov 1, 2005
By Fan Liang This
article focuses on demystifying physical layer issues with multiple input multiple output (MIMO) technology, and presents
ways of improving MIMO performance....
Security Considerations for WiMAX-based Converged Network
Aug 1, 2005
By Ramana Mylavarapu With WiMAX promising to solve the bandwidth bottleneck, many carriers are looking to networking OEMs to provide robust security solutions - particularly VPNs and firewalls - in their edge devices, allowing them to securely deliver feature-rich services to subscribers, while protecting their own networks. Software original design manufacturers are now entering the fray to ensure that device vendors can provide carriers with these next-generation converged platforms, while adhering to the strict certification processes and rigid standards of quality in shorter development cycles....
Direct-sequence UWB signal generation and measurement
Nov 1, 2004
By Peter Cain This article discusses how to generate and measure ultra-wideband signals to design and test the performance of radio receivers handling UWB signals. A number of novel techniques, such as pulse shape recovery and frequency measurements on sub-nanosecond pulses, are described using modern test equipment....
Ultra-wideband as a Short-Range, Ultra-High-Speed Wireless Communications Technology
Aug 1, 2004
By Ibrahim Haroun, T. Kenny and R. Hafez Ultra-wideband technologies have been proposed to provide ultra-high speed data rates for short-range communications. In the United States, the systems have been approved for use in the frequency band 3.1 GHz to 10.6 GHz. It supports bit rate greater than 100 Mbps within a 10-meter radius. UWB
communications coexist with other wireless networking standards such as 802.11 LAN, 802.16 MAN and WAN....
Broadband channel simulator for robust satellite link designs
Apr 1, 2004
By Jack Anderson In the real estate market, there are three priorities: location, location and location. In the broadband satellite communications arena, the top three...
