Fundamentals of Digital Quadrature Modulation 
Feb 1, 2003 12:00 PM, By Ken Gentile
How a formerly analog-only application, the quadrature modulator, is finding a home in modern digital CMOS fabrication techniques...

Integrating Bluetooth in the GSM cell phone infrastructure 
Sep 1, 2001 12:00 PM, By Steve Brown, Mark Lane, Dino Fernandez
click here for article We've all heard the distinct sound in elevators, at restaurants, during meetings, even at church: the cell phone ring. The sound...

Designing a ZigBee-ready IEEE 802.15.4-compliant radio transceiver 
Nov 1, 2004 12:00 PM, 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....

Frequency divider design strategies 
Mar 1, 2005 12:00 PM, By Louis Fan Fei
Typically, in frequency divider design, the trade offs are around the maximum operating frequency, power consumption, number of transistors needed and flexibility. Depending on the specific application the frequency divider is used, analog or digital approaches may be adopted. This paper will cover the fundamentals of both approaches....

Introduction to GSM and GSM Mobile RF Transceiver Derivation 
Jun 1, 2003 12:00 PM, By Paul Kimuli
The GSM system works properly only when its component parts operate within precise limits. Learn the key measurements required for testing GSM transceivers....

So, Who Needs ZigBee? 
Nov 8, 2005 11:21 AM
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?...

A direct-conversion transmitter for WiMAX and WiBro applications 
Jan 1, 2006 12:00 PM, By Cecile Masse
The use of high data rate OFDM modulation translates into challenging requirements for the transmitter in terms of spectral quality and EVM. This calls for low distortion, good signal balance and low phase error. This article will focus on the challenges and advantages associated with implementing a direct conversion transmitter....

Designing LC Wilkinson power splitters 
Aug 1, 2002 12:00 PM, By Fernando Noriega, Pedro J. González
Wilkinson power splitters are common transmission path elements. Designers can implement them more effectively by knowing their nuances....

Fast Rayleigh Fading Simulation with an IIR Filter and Polyphase Interpolation 
Jul 1, 2004 12:00 AM, By Christos Komninakis and Joel F. Kirshman
This simulator efficiently generates correlated complex Gaussian variates with a U-shaped power spectral density. It consists of a fixed IIR filter followed by a variable polyphase interpolator, to accommodate different Doppler rates specified by the user. The complex Rayleigh fading simulator is implemented as a model in the Visual System Simulator....

Matched Filtering and Timing Recovery in Digital Receivers 
Sep 1, 2001 12:00 PM, By Louis Litwin
A practical look at methods for signal detection and symbol synchronization....

Understanding mode S technology 
Dec 1, 2005 12:00 PM, By Wes Stamper
What is mode S? How does it work and why is it needed? What was wrong with the old mode A and C? What is Flight ID, UF and DF, squitter and elementary...