By Ray Chadwick, Berkeley Varitronics Systems, Inc. WiMAX signals suffer from the effects of multipath and exhibit broadband fading characteristics that are very apparent in the spectrum of the received WiMAX signal (see Figure 1). It’s not a trick; OFDM modulation does not eliminate fading and is not always received with a flat spectrum.
After three years of deliberation, the IEEE802.16m air interface definition will be ready for prime time in the next few months. This critical step toward creating true 4G cellular technology based on WiMAX is important enough to earn compliant products a new name: WiMAX 2. Further proof came last month, when an impressive subset of the WiMAX community created the WiMAX 2 Collaboration Initiative to "improve the economics of mobile broadband" and "to create a better value chain for service providers.
By Kevin Donoghue, President of Telesoft What is Telecom Expense Management? Getting wireless costs under control is becoming an ever-increasing concern for business executives in the midst of our struggling economy. Now more than ever, business use of telecom services is continually increasing, often resulting in over spending and overbilling due to inefficient processes.
By Keith Anderson, Agilent Technologies click to enlarge Figure 1. NVNA block diagram. High-power RF amplifiers are used in telecommunications, biomedical, and military systems. With output power levels ranging up to 1kW, these amplifiers are typically designed to operate near or into compression in order to provide the maximum output power possible.
The Emergence of JESD204A in Data Converters and Low Power FPGAs in Wireless Infrastructure EquipmentApril 14, 2010 12:12 pm | Comments
The increasing data throughput demands on base stations have led to increased radio unit component cost and power, with associated printed circuit board and interface complexities, as well as heightened signal integrity concerns.
Nancy Maas Editor-in-Chief The 2010 Mobile World Congress, produced by the GSMA organization, will open on February 15th in Barcelona, Spain. Those who are fortunate enough to attend this event will be able to witness first hand what the future holds for the mobile broadband industry.
By Brian Blum, Texas Instruments Bluetooth Low Energy (BLE) is fast-becoming the hottest buzz-word in low-power wireless communications. Within five years, we have seen a variety of standard and proprietary networking protocols emerge, begin to show promise, and occasionally open up new market spaces and fundamental opportunities for technical innovation.
Helen Katske, Phil Damberg and KM Bang, Tessera click to enlarge Figure 1 The continued increase in mobile handset functionality is being enabled by more powerful baseband and applications processor chips, which are more frequently coupled with memory devices using package-on-package (PoP) stacking.
By Michele Kinman, Energy Harvesting Forum click to enlarge Energy harvesting is the process of capturing and accumulating byproduct energy as the energy becomes available, storing the energy for a period of time and conditioning it into a form that can be used later such as operating a microprocessor with in its limits.
By Rob McCammon, Open Kernel Labs Figure 1. Mobile Virtualization. Over the last few years, virtualization has evolved from an obscure technology to become a key enabler of enterprise server and desktop applications. More recently, virtualization has also begun to play a comparably pivotal role in embedded development and deployment.
By Mike Woodward, Communications Industry Marketing Manager, The MathWorks click to enlarge Figure 1. Silo development methodology. The use of silo-based methods in wireless systems design often introduces problems in the development process.
By Tom Huegerich, Vice President, Global Fiber, ADC Gazing out over the next several months, wireless operators see an enormous force heading straight at them. It is the surging flood of broadband traffic, fed by the widespread use of smartphones and mobile video applications. With the first waves already crashing onto networks, that flood of traffic threatens to become a tsunami as operators roll out bandwidth-intensive 4G and LTE services in the coming months.
Bandwidth issues can often be alleviated once major wireless carriers introduce solutions such as LTE technology, WiMAX technology and Wi-Fi access points. Dr. Li Mo Chief Architect, ZTE USA Over the past few years wireless data applications have received a lot of buzz and attention due to steady and significant adoption and growth.
By Andrea Bradshaw, Brightstar It has been said that at retail, your package is your brand. And, increasingly, consumers are opting for products and packaging that are green. Can you integrate these seemingly opposing ideas to create packaging that's compelling to buyers and environmentally friendly? And, can you do it without breaking the bank? The answer is, resoundingly, "Yes!" It takes some research, analysis and planning, but "going green" can not only improve your image with your customers and your relationship with Mother Nature, it can also improve your packaging quality and reduce your costs.
Welcome to Brainstorm! How do you assess and manage these constraints while at the same time improving the overall design process and productivity? Jon Friedman, Aerospace & Defense Industry Marketing Manager, The MathWorks As a manufacturer of military electronics, engineers are faced with unique technical and cost/risks design constraints.