Bluetooth transceiver design using EDA software
Oct 1, 2006
By Emanuele Stavagna The RF portion of a transceiver designed by Dialog Seminconductor was designed using the EDA software package, Advanced Design System....
Addressing the new challenges of MIMO wireless LAN manufacturing test
Oct 1, 2006
By Ewan Shepherd Using MIMO architectures, it is possible to extend the data rate or range of
WLAN components. However, there are multiple transmitters and receivers in
this architecture with stringent specifications, which complicates the design and
manufacture of these systems. Nevertheless, new equipment and techniques
can keep the testing costs within the range of that for 802.11a/g systems....
Providing reliable sensing and control using ZigBee wireless networks
Jul 1, 2006
By Peter Wotton This article demystifies ZigBee and demonstrates a light switch, a subset of a typical home networking environment, as an application example to describe the devices needed in the development of a wireless sensor network based on the ZigBee standard....
The challenges and importance of testing mesh networks prior to deployment
Jun 1, 2006
By Fanny Mlinarsky Pre-deployment testing that automates
the performance testing of wireless mesh networks in a controlled laboratory
environment is required to establish its credibility for mission-critical metro-area
network applications....
Is UWB moving toward standardization?
Aug 1, 2005
Ashok Bindra, Editorial Director Despite hurdles, the ultra-wideband UWB standardization process continues with supporters from both factions Multiband OFDM Alliance MBOA...
Low-power receiver architecture for interference-robust UWB radio
Aug 1, 2005
By Domine M.W. Leenaerts and Jozef R.M. Bergervoet Ultra-wideband (UWB) wireless communication promises unprecedented levels of seamless connectivity between consumer electronics devices, enabling gigabytes of data to be transmitted in seconds rather than hours without exhausting the batteries of hand-held devices. To meet the low-cost requirement of consumer product applications, the multiband-orthogonal frequency-division multiplexing system has been designed to minimize transceiver architecture complexity....
Implementing ZigBee wireless mesh networking
Jul 1, 2005
By Tim Cutler ZigBee offers unique advantages for wireless applications. But with a technology this new, realizing a successful ZigBee implementation requires understanding its architecture and operation, assessing design options at the chip and module level, and weighing practical considerations relative to specific application needs....
Direct-conversion Bluetooth receivers
Jul 1, 2005
By Mark Lane Direct-conversion receivers have well-known challenges that are difficult to overcome such as dc offset. Due to the large modulation bandwidth, the effect of frequency offsets is negligible on the overall performance of the direct conversion receiver as implemented in Bluetooth....
Designing wireless interfaces for patient monitoring equipment
Apr 1, 2005
By Noel Baisa Recent advances in wireless technologies now make it possible to free patients from their equipment, allowing greater freedom and even making possible monitoring by their health provider while the patient is on the go....
Why tiny sensors with single-chip wireless platforms are flourishing
Mar 1, 2005
By Bar-Giora Goldberg A miniature, integrated radio-sensor network in a cube less than 1-inch square is
a technology whose time has come. It is essential to understand the special
requirements imposed on RF devices operating on a tiny silicon die....
Designing a ZigBee-ready IEEE 802.15.4-compliant radio transceiver
Nov 1, 2004
By Khanh Tuan Le Besides highlighting the physical (PHY) and MAC
layers of the IEEE 802.15.4 standard, and the network, security and application
layers of the ZigBee wireless technology, this article focuses on efficient
implementation of IEEE 802.15.4-compliant radio-on-a-chip by identifying
potential low-power features in the standard, suitable transceiver architectures
and considering standard CMOS design issues....
Bluetooth and WiFi integration: Solving co-existence challenges
Oct 1, 2004
By Jeffrey Wojtiuk As popular wireless technologies like Bluetooth and WiFi are being integrated on
common semiconductor substrates and printed circuit boards, this article looks
at a number of system challenges that must be overcome to ensure proper
interoperability with co-located Bluetooth and WiFi functionalities....
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....
