Industry News

Understanding W-CDMA Modulation Quality Measurements

There are many ways of characterizing W-CDMA transmitter performance. However, the Third Generation Partnership Project (3GPP) specifications require two measurements to verify the in-channel modulation quality of W-CDMA transmitters - error vector magnitude (EVM) and peak code domain power (peak CDE). This article explores the purpose behind these key...
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2002 Editorial Index

ANTENNAS Chuang, Huey-Ru, Liang-Chen Kuo, Chi-Chang Lin and Wen-Tzu Chen "A 2.4 GHz Polarization-diversity Planar Printed Dipole Antenna for WLAN and Wireless Communication Applications," No. 6, p. 50. Gunnels, Robert "Axial Ratio Measurements of Single Circularly Polarized Antennas," No. 1, p. 124. Izadian, Jamal S. "QFHA Antennas for Satellite...
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A Measurement-based Behavioral Model for I/Q RF Modulators

This article describes a nonlinear behavioral modeling technique for application to I/Q modulated communication channels. The model data was gathered by independent measurements of an I/Q modulator and amplifier, using vector signal generators and anal...
The W-CDMA standard expresses transmit quality in terms of EVM and ACLR, and receive quality in bit error ratio (BER). These quality measurements are simple scalar numbers representing a very complicated system. Modern communications channels (still) consist of a number of concatenated functions such as baseband (BB) processor, DAC,...
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Raytheon Adds Reliability Engineering Consulting

Raytheon Co. is expanding its Reliability Analysis Laboratory (RAL) technical offerings with the incorporation of reliability engineering consulting services. Reliability is a core feature that can make or break the long term success of both products and companies. Design for Reliability (DFR) engineering tasks are just as important as...
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Surrey Aids Nanotechnology Research with UHV STM/SEM

The University of Surrey's (Guildford, Surrey, England) acquisition of an Ultra High Vacuum Scanning Tunnelling Microscope/Scanning Electron Microscope (UHV STM/SEM) is being billed as a central figure to a £1.2 million future nanotechnology research project that is headed up by the institution's Professor of Solid-State Electronics, Ravi Silva. Built...
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