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Wireless Sensor Networks Expand the Reach of Wireless Technology

December 18, 2009 10:55 am | Articles | Comments

Want to learn more about how design engineers are addressing the challenges of Wireless Sensor Networks? Read on! By Nicholas Butler, Wireless Sensor Networks, National Instruments click to enlarge Figure 1. Technology adoption lifecycle from Crossing the Chasm, Geoffrey A.

MIMO-Analysis for WiMAX, WLAN and LTE

December 14, 2009 11:48 am | Articles | Comments

Making measurements involving MIMO applications requires adaptation of the algorithms used in the analysis software. By Johan Nilsson and Dr. Wolfgang Wendler, Rohde & Schwarz click to enlarge Figure 1. MIMO in WiMAX system. Due to ongoing growth in demand for channel capacity, more and more radio standards such as WiMAX, 3GPP HSPA, 3GPP LTE and WLAN are adopting MIMO technology.

Integration and Power Management Open the Door for RKE Applications

December 14, 2009 11:48 am | Articles | Comments

ASSPs are meeting the challenges through the integration of mixed-signal technology and innovative power management schemes. Herve Branquart, Robert Waterman, ON Semiconductor click to enlarge Figure 1: Two way RKE block diagram Wireless transceiver technology is truly established in the automotive industry with Remote Keyless Entry (RKE) now a standard feature of even basic specification vehicles.

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Model-Based Design for Hybrid Electric Vehicle Systems

December 14, 2009 11:48 am | Articles | Comments

Hybrid Electric Vehicle (HEV) development requires collaboration and optimization across multiple engineering domains. By Saurabh Mahapatra, The MathWorks Figure 1: This simplified diagram of an HEV vehicle illustrates one possible arrangement of system elements.

The Role of Wideband Transceiver Technology in Enabling LTE

December 14, 2009 11:47 am | Articles | Comments

An integrated single-chip RF transceiver provides the flexibility to address all aspects of the LTE standard. By Ebrahim Bushehri, Lime Microsystems click to enlarge Table 1: Comparison of data rate and channel bandwidth for wireless standards.

Introduction to LTE Base Station RF Conformance Testing

December 14, 2009 11:47 am | Articles | Comments

By Moray Rumney and Hiroshi Yanagawa, Agilent Technologies, Inc. Operator acceptance testing is yet another step in the process and includes more user-centric tests. click to enlarge Table 1. Base station RF transmitter characteristics tests.

The Hidden Challenge of MIMO Test

October 15, 2009 11:08 am | Articles | Comments

Today, engineers can combine modern RF signal analyzers with a basic understanding of digital downconversion to produce a tightly synchronized MIMO measurement solution. By David A. Hall, National Instruments click to enlarge Figure 1.

Build Agility through Wireless Networks Designed Right

October 15, 2009 9:33 am | Articles | Comments

Designing a wireless data network without fully accounting for the mix of applications, the types of client devices and number of users risks reduced performance. By Dr. Roger Skidmore, Motorola click to enlarge Figure 1.

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Protecting Chinese 3G Base Stations

October 15, 2009 9:02 am | Articles | Comments

Judicious use of the appropriate protective circuits and devices in cellular base stations can greatly improve reliability and ensure required compliance with YD5098-2005. By Teddy To, China, Littelfuse Inc. click to enlarge Figure 1.

WiMAX 101 The Evolution of WiMAX

October 14, 2009 9:18 am | Articles | Comments

With networks built around an infrastructure of base stations and subscriber stations like WiMAX, the size of the infrastructure and the number of deployments is a key consideration. John Schwartz, Digi International It is always interesting whenever a new standard is adopted or starts to gain some ubiquity in the marketplace.

State-of-the-Art IC: Transmitter in Ultrasound Devices

October 14, 2009 9:18 am | Articles | Comments

Lower voltage IC technologies now enable ultrasound receiver chips with unprecedented high gain and low noise numbers. By Ismail Oguzman and Arash Loloee, Texas Instruments click to enlarge Figure 1. Typical block-diagram of a complete medical ultrasound system.

Bringing the Real World into the Lab for 4G Wireless Testing

October 2, 2009 8:51 am | Articles | Comments

Failure to test base-station or mobile device receivers under realistic conditions can add significant risk in terms of support costs, churn, and operational costs. By Arashk “Ash” Mahjoubi-Amine, Spirent Communications click to enlarge Figure 1.

Challenges of LTE Basestation and Handset Testing

August 13, 2009 7:18 am | Articles | Comments

With the pressure on infrastructure equipment vendors to deliver quickly to market, structured, incremental and flexible test programs are essential for the development integration, verification and optimization of LTE infrastructure. By Phil Medd and Nick Carter of Aeroflex Test Solutions click to enlarge Figure 1.

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Dual Channel MIMO Measurements for WiMAX™ Wave 2

June 26, 2009 12:31 pm | Articles | Comments

By Benjamin Zarlingo, Agilent Technologies Inc. In designing, troubleshooting and optimizing WiMAX Wave 2 systems, a variety of dual-channel measurements can provide essential insight into their operation and performance. click to enlarge Table 1.

Radio Channel Emulation Challenges in 3GPP LTE

June 26, 2009 6:55 am | Articles | Comments

Securing product performance in the field by using laboratory channel emulation can give a competitive edge to companies that use these solutions. By Janne Kolu, Elektrobit Corporation click to enlarge Figure 1. Emulation of a radio channel in the laborotary conditions.

Simultaneous Multimode RRH Design Made Easy

June 26, 2009 6:54 am | Articles | Comments

Diverse modulation formats and sampling rates between various standards make designing common building blocks challenging. Deepak Boppana, Altera Corporation click to enlarge Figure 1. Farrow Filter Structure. Remote radio heads (RRH) technology with support for simultaneous operation of multiple air-interface protocols is an emerging product requirement for operators.

Next-Generation Wireless Sensing is Moving Forward

May 27, 2009 7:31 am | Articles | Comments

With the integration of MEMS technology in the remote, motion signatures can be digitized for the game control. By Michelle Kelsey, Freescale Semiconductor The evolution of gaming is on its way - Freescale's accelerometer, MCU and radio portfolio enables an ideal chip set for low power with high integration.

It's in the Tag: The Importance of Considering Power Efficiency when Choosing a Real Time Location System

May 27, 2009 7:31 am | Articles | Comments

For a location system to deliver a return-on-investment, a critical mass of assets must be tagged for tracking. By Steve Jackson, RadarFind Corporation Figure 1. Status switches on RTLS tags. While more organizations are realizing the value of investing in a real time location system, demonstrating the return-on-investment is critical to garner broad support.

Electronic Packaging RF SiPs Demand Early Packaging Focus

April 8, 2009 6:48 am | Articles | Comments

By considering packaging in the early stages of product development, design teams can determine the best architecture for their particular application. By Ralph Ebbutt, Maxtek Components Corp. click to enlarge Figure 1 - An example of a system-on-chip (SoC) device.

Remote Possibilities

April 8, 2009 6:48 am | Articles | Comments

Using advanced battery technologies to unlock the dynamic growth potential of remote wireless sensors used in "smart infrastructure" and related applications. By Sol Jacobs, Tadiran Batteries Contrary to all the recent economic news, the February 17, 2009 edition of The Wall Street Journal contained an upbeat article by Michael Totty entitled "Smart Roads.

Femto Mass Market Mobilization

March 16, 2009 7:03 am | Articles | Comments

By Todd Mersch, Continuous Computing So here we are in the second half of 2008 — why are femtocells not more widely deployed in our homes? When are we finally going to get five bars in the family room? And what’s keeping us from quicker YouTube downloads in our kitchens? click to enlarge Figure 1.

Testing LTE and WiMAX OFDM/MIMO-Based Systems

March 6, 2009 6:55 am | Articles | Comments

The introduction of new radio technoloiges, like OFDM and MIMO, in LTE and WiMAX systems has created the need for new types of test equipment. George Reed, Azimuth Systems click to enlarge Figure 1. Three methods of testing transmitter and receiver performance: lab-based, direct cable connectivity, over-the-air testing and lab-based, connection through a channel emulator that simulates real world conditions.

Designing Handsets with Modularity

March 6, 2009 6:55 am | Articles | Comments

By Danny Tseng, Cypress Semiconductor Designing a platform with modularity in mind is one approach that can shorten design time as well as enable easier feature upgrades. click to enlarge Figure 1. Architecture modularization of a mobile handset.

Low Cost FPGA-Based HD/SD SDI Transceivers

February 25, 2009 10:46 am | Articles | Comments

The recent advent of low-cost FPGAs equipped with high-performance transceivers and DSP blocks will greatly reduce the build and deployment costs of a video broadcast system. By Shakeel Peera, Lattice Semiconductor Corporation click to enlarge Figure 1.

Noise Elimination Power Converter Control Circuit

February 25, 2009 10:46 am | Articles | Comments

Grounding and care in layout is the key to keeping noise out of the control circuit and allowing correct operation. Grounding and care in layout is the key to keeping noise out of the control circuit and allowing correct operation. By John Bottrill, Texas Instruments click to enlarge Figure 1.

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