652 results found for Louis E. Frenzel, displaying items 1 - 20
July 7, 2008
[ED Bookstore] Broadband Wireless Access And Local Networks: Mobile WiMAX and Wi-Fi Broadband Wireless Access And Local Networks: Mobile WiMAX and Wi-Fi is a brand new book published by Artech House. A long time publisher of wireless and related books, Artech is doing a great job of finding authors with the latest knowledge on wireless topics, and quickly getting books into the hands of those who need them. Overall, this book is a recommended reference book if you are working with these standards.
July 7, 2008
[ED Bookstore] Antenna Engineering Handbook, 4th Edition
I will be straight with you and say I have no idea how to write a review of a book like this. It does indeed fit the definition of the word “tome,” but I mean that in the best possible way. If you are looking for a master reference on antennas, this is certainly a great one. You will not be disappointed.
June 26, 2008[Engineering Essentials] DDS Basics
Most newer signal generators, such as arbitrary waveform generators (AWGs), lower-frequency RF generators, and vector signal generators (VSGs), use direct digital synthesis (DDS) instead of fractional-N phase-locked-loop (PLL) synthesizers, which are common in older instruments and higher-frequency RF generators. Though not new, DDS has improved significantly over the past few years thanks to the arrival of faster, single-chip DDS synthesizer chips like those from Analog...
June 26, 2008[Engineering Essentials] Signal Generators Step Up And Deliver Come Test Time
All electronic circuits and equipment receive input signals and process them into new and different output signals. When you’re designing and testing circuits and equipment, where do you get those input signals? You could build your own signal source for a specific application, but that isn’t necessary. That’s because there’s a signal generator available for any type of signal, no matter what type of equipment is being designed or under test....
June 19, 2008
[TechView: Wireless] Bluetooth, Low-Power Bluetooth, GPS, And FM Radios Fit On One Chip
Cambridge Silicon Radio’s BlueCore 7 chip incorporates four separate radios in a fully integrated package targeting cell phones. The radios include an FM receiver and transmitter, ultra-low-power Bluetooth for short-range sensor applications, the standard Bluetooth version 2 + EDR transceiver, and a GPS receiver using an enhanced mode to provide location information when GPS satellites are out of view.
June 19, 2008
[TechView: Wireless] Receiver Chip Brings Broadcast TV To Laptops
Some high-end desktop PCs offer optional TV tuners, but they haven’t been practical for laptops until now. Laptops and other portable devices equipped with the FlexiTV chip set from Mirics Semiconductor can receive over-the-air TV broadcasts.
June 19, 2008
[TechView: Wireless] Programmable Wireless Baseband Chip Handles Any OFDM Standard
The fully programmable Odyssey 8500 baseband chip works with a wide range of available RF front ends. Its eight programmable DSPs handle all the OFDM and related processing, including multiple-input/multiple-output (MIMO) and other features. The chip also includes a PowerPC RISC processor and 32 Mbits of DRAM for related control functions.
June 19, 2008[Technology Report] Wending Our Way From Wired To Wireless
Over the past century, we’ve wired and rewired the world countless times, evolving from copper cable to fiber optics and beyond. But this cycle will soon come to an end as rapid-fire wireless innovations consistently deliver faster, cheaper, and more reliable communication. ONE TREND AT A TIME The telephone business is still mostly wired, but the cell-phone phenomenon continues to chip it away. The...
June 19, 2008[Technology Report] Wired Won't Go Down Without A FIght
The trend toward a wireless world will forge on, but don’t expect to see the demise of wires. We could even see some new wires, virtually all of which will be glass or plastic rather than copper. The well-entrenched plain-old telephone systems (POTS) or public switched telephone network (PSTN) aren’t going away. Major phone carriers AT&T and Verizon, as well as smaller carriers, will continue to maintain these systems despite the declining number of wired subscribers. They...
June 19, 2008[Technology Report] Some Interesting Wireless Trends
The emergence of the femtocell: A femtocell is essentially a small cell-phone basestation for the home. It’s designed to improve or, in some cases, even enable good at-home cell-phone service, which is something many consumers don’t actually have. The femtocell connects to your broadband cable TV or DSL service as the backhaul. Improved data services at higher speeds will be easier to access. Femtocell tests are being conducted nationwide. Services are expected to begin later...
June 19, 2008[Technology Report] Move Over, Couch—The Cell Potato Is Here
It’s hard to keep up with today’s cell-phone functionality, with voice calls, text messaging, e-mail, Web surfing, GPS navigation, cameras, FM radios, and MP3 music. Now television has jumped headlong into the mix. A few carriers already offer TV programming over their networks, and new broadcast services have come online. Expect an even bigger push for mobile TV later this year and next year. BIG CONTENT, LITTLE...
June 10, 2008
[MTT-S] Microwave Show More Meaningful Than Ever
The IEEE’s International Microwave Symposium (IMS2008), sponsored by the Microwave Theory and Techniques Society (MTT-S) is being held in Atlanta, June 15-20. The show, which has been growing each year, is more relevant than ever. While microwave radio was once relegated to the radar, electronic warfare, long distance telephone relay, and satellites fields, today microwave is mainstream wireless.
June 12, 2008[TechView: Communications] AC Powerline Connections Still A Viable Home Networking Choice
Using the ac powerline at home to interconnect PCs, peripherals, and consumer electronics via broadband techniques isn’t new. Several companies still make powerline modems. However, the wireless approach to home networking using Wi-Fi has become the most widespread networking option. It’s fast and convenient, and it doesn’t require any new wires. But you can also say that about the other home networking options. MoCA uses the installed base coax cable in a home,...
June 12, 2008[Technology Report] Complex Wireless Standards Put Instruments To The Test
Once upon a time, RF testing was relatively simple. You would measure power output in a transmitter and look for spurious signals with a spectrum analyzer. At the receiver, you measured noise and sensitivity. Unfortunately, those halcyon days are gone forever. Radio complexity has intensified dramatically with advanced digital modulation schemes, softwaredefined radio architectures featuring digital signal processing, I/Q signal chains,...
June 6, 2008
[TechView: Test] MELs Make Power-Source Testing Faster And Easier
How do you test a very high-current and/or high-voltage power source? You measure the voltage, current, and power, but you need to test the source under typical and maximum load conditions. So what do you use for a load, especially if it must dissipate up to tens of kilowatts? The MEL series of modular electronic loads from PPM Inc. can handle up to 60 kW in one 8-ft rack.
June 6, 2008
[TechView: Test] GPS Satellite Signal Generation Simplifies Nav Receiver Testing
The GPS Toolkit from National Instruments is a software accessory for the company’s popular LabVIEW program. In conjunction with NI’s PXIe-5672 or PXI-5671 RF vector signal generators, it can simulate up to 12 simultaneous GPS satellite signals with varying conditions.
June 6, 2008
[TechView: Test] Solar-Array Simulator Imitates Satellite Environmental Conditions
Some things are really tough to test. For example, how do you simulate the solar panels on a satellite under varying light and orientation conditions? Well, Agilent’s E4360 Solar Array Simulator accurately simulates the I-V curve of a solar panel’s array under various environmental conditions.
June 6, 2008
[TechView: Test] Handbook Provides The Fundamentals Of Switching In Test Systems
Most test systems today require switching to reconfigure the test setup to make multiple different tests and measurements. This isn’t something you learn in school. Fortunately, Keithley Instruments’ Switching Handbook: A Guide to Signal Switching in Automated Test Systems consists of up to 180 pages of practical tutorial information on how to set up and optimize switching test systems.
May 22, 2008[TechView: Wireless] Software-Defined Transceiver Chip Handles Any Band And Protocol
Imagine handsets that can work on any network, in any country, and on any frequency with the prevailing protocol and with seamless handoffs. Such devices do exist, but they aren’t cheap. The implementation of multimode and multiband wireless devices requires multiple transceivers, increasing cost as well as power consumption and size—specs that commodities like cell phones can’t afford. Software-defined radio (SDR) offers a potential solution, but it also is...
Email address: 
prev. page
[1]
