Wireless/Networking

Richard Quinnell
Technical Editor
A resources site and community for engineers involved in designing communications or networking-related products and systems. Find design tips, new product information and discussion on wired and wireless networking (Ethernet, ZigBee, Wi-Fi etc.), telecom (3G, 4G, LTE etc.), and application areas like the smart grid, smart homes, the Internet of Things, and cloud computing.

Design with QDR-IV for high-performance networking systems, part 2

In part 2 of this series, we’ll cover important bus issues, such as bus turnaround, bus inversion, and address parity, when designing with QDR-IV. Read More...

Evaluate reference clocks for serial-data jitter specifications

Measurement techniques used for jitter don't let you predict how a reference clock will operate in a real application. Read More...

Five test and measurement predictions for 2017

Larry Desjardin makes his “Top 5” prediction of trends in test and measurement for 2017. Read More...

What is op amp slew rate in a slew-enhanced world?, Part 1

The concept of an available slew rate in op amps has become more challenging with today’s modern slew enhanced devices. Read More...

Maximize infotainment system design reuse with I2C GPIO expanders

I2C GPIO expanders provide a way to reuse existing design and add new feature sets to form an integrated automotive cockpit that combines infotainment and cluster systems. Read More...

Near-field scanning: useful or misleading?

Near-field probes can help you find the source of emissions, but remember, not all fields propagate. Read More...

Autonomous cars on various terrains

When the world is treading on the driverless car path, it is important to understand whether the driverless vehicle is really intended for every terrain. Read More...

TE, Molex to dual-source high-speed connectivity products

Rivals will make it easier for engineers to specify connectors, modules, and cable assemblies. Read More...

Real world RS-485: Low power, low EMI

RS-485 is a well established serial interconnect for both point-to-point and multi-drop applications. Learn how to optimize your designs. Read More...

Networked spectrum analyzer delivers in real time

ThinkRF's R5500 comes in models up to 27 GHz with real-time capture bandwidth to 100 MHz, all under network control and display from a PC. Read More...

Industrial IoT to gain traction in 2017

Long predicted but slow to arise, the Industrial Internet of Things may finally be poised to gain momentum in 2017. Read More...

Understanding sample rate conversion and scaling factors

In discussing up- and downsampling in a multirate filter, a few questions remain unanswered. In this article, we answer these questions from both time and frequency domain viewpoints. Read More...

Real-time analyzer captures pulsed and modulated signals

The Tektronix RSA7100 real-time spectrum analyzer covers up to 26.5 GHz. Options let you record up to two hours of signal data. Read More...

Teardown: Dead GbE switch

Another day, another dead GbE switch. Maybe a decade of service is asking too much, but let's see what went wrong. Read More...

Connected cars: IoT’s value proposition

One area of IoT where the value proposition is relatively obvious is in connected cars, but how will the data exchange work? Read More...

Cycles per second: A historical perspective

Heinrich Hertz proved the existence of electromagnetic waves, for which we associate his name with cycles-per-second. Read More...

Understanding and designing differential filters for communications systems

Understand how to transfer a single-ended filter design to a differential filter design, and optimize your PCB design. Read More...

What I learned about LTE-M at the MEMS & Sensors Executive Congress 2016

MEMS & Sensors Executive Congress keynote speaker Cameron Coursey, from AT&T, presented "The Future of Sensors and MEMS in the Internet of Things." Read More...

System tests PAM4 signals to 56 and 64 Gbaud

Anritsu combines three instruments into an integrated system for making BER measurements up to 56 Gbaud PAM4 while generating signals to 56 Gbps PAM4. Read More...

Hands-on with BLE, apps, and ARMduino: The Simblee

RF Digital's Simblee (Simple BLE) offers a compelling and unique way to develop Bluetooth-enabled embedded systems alongside instantly customizable companion apps. Read More...

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Splitting and arbiting a bidirectional serial bus

Serial buses like I2C are widespread. This Design Idea demonstrates ways of splitting each bidirectional line into two unidirectional ones – and why you might want to. Read More...

NRZ to AMI converter uses single supply

Convert serial data to AMI format with this simple Design Idea. Read More...

Monitor a differential pair for valid & fault conditions

Monitor the state of a differential communications line with this Design Idea. Read More...

Avago Tech Note: High-speed optocouplers enable industrial networks

Communicate at up to 25Mb/s over (e.g.) PROFIBUS. Read More...

LTC Design Note: Robust 10MHz reference clock input protection circuit and distributor for RF systems

Design a protected 10MHz reference input without degrading phase noise. Read More...

Postprocessing converts Spice to RF analyzer

Designers of RF and high-frequency products need a simulator that can predict noise figure at a given frequency, minimum noise figure, optimum reflection coefficient for noise, and noise resistance. Read More...

Simple circuit suits quadrature detection

A circuit generates an output voltage that you can measure to determine whether two sine waves have a quadrature relationship. Read More...

Low-cost RF synthesizer uses generic ICs

You can make an AM-band frequency synthesizer from standard components. Read More...

Achieve simple IR-data transmission from a PC’s serial port

By transmitting appropriate hex values from a PC's serial port to a pair of IR LEDs, a remote-control IR receiver can enable 38.4-kHz data transmission. Read More...

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Waveguide attenuators cover seven bands

Pasternack’s waveguide direct-read attenuators operate in seven waveguide bands within a frequency range of 18 GHz to 110 GHz. Read More...

Networked spectrum analyzer delivers in real time

ThinkRF's R5500 comes in models up to 27 GHz with real-time capture bandwidth to 100 MHz, all under network control and display from a PC. Read More...

Real-time analyzer captures pulsed and modulated signals

The Tektronix RSA7100 real-time spectrum analyzer covers up to 26.5 GHz. Options let you record up to two hours of signal data. Read More...

EDN Hot 100 products of 2016: RF, Wireless & Networking

This section of EDN's Hot 100 Products of 2016 includes communications/networking products for RF and wireless applications, often targeting the IoT. Read More...

Tektronix updates PAM4 validation platform

The latest release of Tektronix’ PAM4 transmitter analysis software adds error detection, SNDR measurement, and FFE/DFE equalization. Read More...

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Teardown: Dead GbE switch

Another day, another dead GbE switch. Maybe a decade of service is asking too much, but let's see what went wrong. Read More...

Teardown: Wireless keyboard and remote senses motion

The Mohu Channels wireless keyboard is also a remote control with motion-activated on-screen cursor capability; see how it works. Read More...

Teardown: Apple iPad Air packs faster A7

Apple's iPad Air packs a somewhat faster A7 processor but few other surprises. Read More...

Dissecting the Intel 710 Enterprise SSD

The design for this drive, which uses multilevel-cell NAND flash for primary storage, emphasized endurance, reliability, and power efficiency. Read More...

Teardown: Ethernet and EMP take out TV tuner

In this teardown we look for evidence that an EMP generated by a lightning bolt coupled to Ethernet cable, acted as an antenna, and zapped relevant ICs inside a TV tuner. Read More...

Dissecting Disney's MagicBand

Disney is no stranger to technology, but one of the really cool tools they've put out fairly recently is the MyMagic+ system or MagicBand. Read More...

The Nexus One: Google hits a smartphone home run

More than a year after its unveiling, the Nexus One remains a leading-edge product, and represents a substantial leap in capability beyond the T-Mobile G1. Read More...

Wireless high-definition video: silicon consolidation that's maximal

The Wireless Gigabit Alliance's 60-GHz-based high-definition wireless-video-transport scheme may be on the way, but SiBEAM's pioneering approach and multiple product generations are already on the scene. Read More...

Sony Ericsson’s Xperia X10 mini: the teardown skinny

Does this smartphone address the market need for a simpler handset that will make and take calls, handle e-mail and Web surfing, and fit comfortably into a normal-sized pocket? Read More...

Inside a cellular femtocell

The solution to smartphone data traffic is a problem for femto-basestation designers. Read More...

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Design with QDR-IV for high-performance networking systems, part 2

In part 2 of this series, we’ll cover important bus issues, such as bus turnaround, bus inversion, and address parity, when designing with QDR-IV. Read More...

Maximize infotainment system design reuse with I2C GPIO expanders

I2C GPIO expanders provide a way to reuse existing design and add new feature sets to form an integrated automotive cockpit that combines infotainment and cluster systems. Read More...

Real world RS-485: Low power, low EMI

RS-485 is a well established serial interconnect for both point-to-point and multi-drop applications. Learn how to optimize your designs. Read More...

Design with QDR-IV for high-performance networking systems, part 1

In part 1 of this multi-part series, we’ll discuss the two types of QDR-IV memory, clocking, read/write operations, and banking. Read More...

The basics of Bluetooth Low Energy (BLE)

Bluetooth Low Energy is the intelligent, power-friendly version of Bluetooth wireless technology making smart gadgets compact, affordable, and less complex.  Read More...

Building wearables that sense, think, and communicate, part 2

In Part 2 of this series, additional design challenges for wearables, including field upgrade, energy harvesting, connectivity, and special features are discussed. Read More...

Building wearables that sense, think, and communicate, part 1

This series provides guidance in meeting the myriad design challenges of building interactive wearable devices. Part 1 will identify the challenges and offer help in the way of feature-rich MCUs. Read More...

Wireless networking will cover the world

The next 60 years in wireless will be more exciting than the last 60 years, with everything from 10G to intrusion tolerant networks and photonic Li-Fi. Read More...

Implementing Bluetooth Smart modules in industrial IoT applications

Bluetooth Smart technology is one of the easiest and most cost-effective ways to implement IoT. Read More...

2D semiconductors take aim at optical communications

Developments in the lab offer glimpses of a technology that could change the future of high-performance optical links. Read More...

Flexible RF Front End Designs for Mid-Tier and Regional Smartphones

New flexible design techniques are shortening development times and increasing design reuse as mobile phone standards proliferate. Read More...

A look into Bluetooth v4.2 for Low Energy Products

Bluetooth LE v4.2 introduces some important specification changes. Here's a quick summary. Read More...

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Five test and measurement predictions for 2017

Larry Desjardin makes his “Top 5” prediction of trends in test and measurement for 2017. Read More...

Near-field scanning: useful or misleading?

Near-field probes can help you find the source of emissions, but remember, not all fields propagate. Read More...

TE, Molex to dual-source high-speed connectivity products

Rivals will make it easier for engineers to specify connectors, modules, and cable assemblies. Read More...

Connected cars: IoT’s value proposition

One area of IoT where the value proposition is relatively obvious is in connected cars, but how will the data exchange work? Read More...

Cycles per second: A historical perspective

Heinrich Hertz proved the existence of electromagnetic waves, for which we associate his name with cycles-per-second. Read More...

What I learned about LTE-M at the MEMS & Sensors Executive Congress 2016

MEMS & Sensors Executive Congress keynote speaker Cameron Coursey, from AT&T, presented "The Future of Sensors and MEMS in the Internet of Things." Read More...

Enterprise IoT: a standards-based approach to the connectivity and security challenge

The IoT is so all encompassing that standards are playing catch up. Here’s a look at open standards and what it will mean to IoT security and connectivity. Read More...

Marketers talk funnier than ever

As we keep coming up with new buzzwords, marketers keep misusing the English language. Read More...

How one researcher cracked the iPhone 5c

Larry Desjardin describes how one researcher cracked the iPhone 5c using test and measurement equipment. Read More...

The trouble with relying on the cloud

A cloud-centric product strategy delivers an abundance of benefits for developers and purchasers alike ... until the cloud goes down, that is. Read More...

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