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Migration From WiMAX Release 1 To WiMAX Release 2
9/16/2010
The WiMAX Forum is accelerating its development efforts to produce Release 2 equipment based on the upcoming IEEE Standard 802.16m. The new release will offer significant coverage and capacity improvements over WiMAX Release 1. The development timeline for Release 2 targets early engineering trials by mid-2011, with WiMAX Forum certification of equipment by the end of 2011, early commercial availability by mid-2012, and general commercial availability with rich terminal offerings in 2013. This article provides basic recommendations for migration from Release 1 to Release 2, assuming that the migration starts from specific typical WiMAX network deployment scenarios. By the WiMAX Forum
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Successful High-Precision QoS Measurement In Widely Deployed 10-Gbit/s Networks Based On General-Purpose Personal Computers
8/31/2010
NTT Laboratories has developed a 10-Gbit/s PCI (peripheral component interconnect) network interface card (NIC) with network measurement extensions (measurement NIC). It works both as a normal NIC for a 10-Gbit/s network and as a measurement NIC. Its extensions enable precise measurements of the network status and quality of service (QoS). It will let us develop a reliable network measurement system based on inexpensive general-purpose personal computers (PCs). This article describes techniques for building 10-Gbit/s wire-rate precise network measurement systems that can measure the quality of service (QoS) of high-speed networks precisely and quickly, even with non-sampling measurements.
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White Paper: Successful High-Precision QoS Measurement In Widely Deployed 10-Gbit/s Networks Based On General-Purpose Personal Computers
8/31/2010
NTT Laboratories has developed a 10-Gbit/s PCI (peripheral component interconnect) network interface card (NIC) with network measurement extensions
(measurement NIC). It works both as a normal NIC for a 10-Gbit/s network and as a measurement NIC. Its extensions enable precise measurements of the network status and quality of service (QoS). It will let us develop a reliable network measurement system based on inexpensive general-purpose personal
computers (PCs). This article describes techniques for building 10-Gbit/s wire-rate precise network measurement systems that can measure the quality of
service (QoS) of high-speed networks precisely and quickly, even with non-sampling measurements.
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Case Study: WiFi Antenna In Free Space And Subsequent Placement In Netbook
8/17/2010
By Remcom, Inc.
Accurate results are easily obtained after generating a WiFi antenna using the sketching tools in Remcom's XFdtd Release 7. However, when the antenna design is placed in the realistic operating environment of a netbook computer, it must be tuned for optimal performance.
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White Paper: High Performance SiGe PLLs Pair With Low Phase Noise GaAs VCOs For Microwave Radio
8/6/2010
By Hittite Microwave Corporation
Integration, performance, and functionality are three of the most common requests made by RF and microwave designers striving for leading-edge systems with components that can help them deliver that often elusive market edge. In the world of signal generation, Hittite Microwave Corporation is meeting these challenges with the introduction of broadband frequency synthesizers and phase locked loop (PLL) integrated circuits that are designed to deliver superior performance and innovative features, all within a miniature surface-mount package.
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White Paper: The Design Of E-Band MMIC Amplifiers
8/4/2010
The worldwide availability of a large amount of spectrum at 71-76GHz and 81-86 GHz (commonly known as "E-band") for high data-rate wireless links has led to substantial interest. The design of electronic equipment at such high frequencies is challenging. Parasitic effects that were negligible at microwave frequencies become problematic and the availability of suitable active components is very restricted. The development of custom GaAs MMICs offers a route to realising low-cost, reproducible E-band components. This article addresses the design and implementation of E-band MMIC amplifiers. It considers process selection, design challenges and practical approaches and presents the measured and modelled performance of a single-stage E-band gain block.
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The Design Of E-Band MMIC Amplifiers
8/4/2010
The worldwide availability of a large amount of spectrum at 71-76GHz and 81-86 GHz (commonly known as "E-band") for high data-rate wireless links has led to substantial interest. The design of electronic equipment at such high frequencies is challenging. Parasitic effects that were negligible at microwave frequencies become problematic and the availability of suitable active components is very restricted. The development of custom GaAs MMICs offers a route to realising low-cost, reproducible E-band components. This article addresses the design and implementation of E-band MMIC amplifiers. It considers process selection, design challenges and practical approaches and presents the measured and modelled performance of a single-stage E-band gain block.
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What's The Best Wireless Transport Option For Uncompressed HDTV Video?
8/3/2010
Once the exclusive realm of scientific research and military use, wireless
systems operating in the upper millimeter wave (MMW) regions are now
providing cost-effective solutions for high-capacity commercial data transport
needs. The unique attributes of MMW signal propagation, combined with the scarcity of RF spectrum at lower frequencies, assures that the proliferation of MMW systems and their effect on daily life will continue. This article examines the unique attributes of signal propagation in the MMW region. The goal of this analysis is to provide the reader with a general, working knowledge to make informed decisions when considering MMW solutions.
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White Paper: What's The Best Wireless Transport Option For Uncompressed HDTV Video?
8/3/2010
Once the exclusive realm of scientific research and military use, wireless systems operating in the upper millimeter wave (MMW) regions are now providing cost-effective solutions for high-capacity commercial data transport needs. This article examines the unique attributes of signal propagation in the MMW region. The goal of this analysis is to provide the reader with a general, working knowledge to make informed decisions when considering MMW solutions.
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What’s The Value Of ZigBee?
7/26/2010
Today NXP announced that it is acquiring Jennic, the UK based RF design company that specialises in ZigBee chips and stacks. That in itself is not surprising. The market for ZigBee silicon has been consolidating for some time, with the previous acquisitions of One RF, Chipcon and module vendor Meshnetics. It’s something that I predicted would happen last year. It’s good news for the design team at Jennic, as NXP should provide them with the scale to grow and a sales infrastructure and industry stature that increases their customer base.
