Recent "Test & Measurements"
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Classic Discrete Design Skills Are Making a Comeback
Modern CMOS processes that enable integration of both logic and RF functionality are commonly used in the design of transceiver circuits for wireless devices. While logic and radio functions benefit from the integration possibilities, high-Q, high precision passive elements often used for impedance matching and frequency selectivity are usually left outside the chip in the form of discrete elements or filter circuits.
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Recent "Integrated Circuits"
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3G+ Baseband Prototype System Implementation Part 3 of 3
This is the third and final article in a series focusing on how enhancements in second- and third-generation serial RapidIO devices can improve 3G+ baseband processing. The first article in this series discussed how serial RapidIO serves as the foundation of the baseband system. The second article detailed how second- and third-generation devices provide additional proprietary features to further enhance 3G+ baseband performance and function.
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Techniques for Handling Increased Functionality and MIMO Requirements in Shrinking Platforms
The need to enhance functionality for wireless devices such as smartphones and data cards has driven engineers to develop circuitry with higher levels of integration to help reduce device size and cost. The multiple air interfaces supported by many of these devices often require diversity or MIMO (multiple-in, multiple-out) configurations.
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Recent "Embedded Systems"
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Enhanced RFCMOS Paves the Way for UWB Systems
Ultra Wideband (UWB) wireless systems are capable of delivering extremely high data rates with little interference and excellent frequency diversity. These transmission properties allow high performance systems to be designed at frequencies that can be implemented using enhanced RFCMOS IC technologies.
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Software Defined Radio for Wireless Devices
Wireless in the commercial world started in the late 1980s with the advent of car-phones and 2 lb. handsets that cost more than $2000. The first problem that the industry needed to solve was that of reducing size and cost in order to make the handset a portable and mass-market device. This problem has mostly been solved; we now have phones that barely weigh a couple of ounces and cost less than $40. The next challenge for the industry was to evolve the handset from a purely voice communications device to a multifunction device that is capable of handling data, video, music, and graphics as comfortably as voice.
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Recent "Unlicensed Technologies"
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Recent "Power"
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