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Wireless/Networking

Janine Love
Senior 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.

Ternary modulation for Class-D amps (Part 2)

An inherent problem with Class-D amplifiers is the noise generated by the harmonics of the signal. This paper discusses a software-centric noise reduction technique for a single tone which is required when a clean, single frequency is desired when driving an antenna. Read More...

Staggering rise in Internet traffic – forecast to pass one zettabyte in 2016

Video, the Cloud, and the Internet of Things are all driving the upward trajectory of data usage globally that will surely continue to rise past 2016. Read More...

Peregrine flies to Murata

Today, we have news that Peregrine Semiconductor will be purchased by Murata. Here’s a reflection on where they’ve been. Read More...

ULP wireless: over-the-air software upgrades

Revising an ultra low power (ULP) wireless chip’s software in the field has been difficult. But new technology will make it routine - to developers’ and consumers’ benefit alike Read More...

Ternary modulation for Class-D amps

An inherent problem with Class-D amplifiers is the noise generated by the harmonics of the signal. This paper discusses a software-centric noise reduction technique for a single tone which is required when a clean, single frequency is desired when driving an antenna. Read More...

Book Excerpt: Sevick’s Transmission Line Transformers, Chapter 9, Part 3

This chapter excerpted from Sevick’s Transmission Line Transformers describes the balun as a subset of transmission line transformers with an in-depth treatment of most used types. Schematics and design /build information details are shown and are well described. Read More...

Bluetooth v4.1: What developers need to know

Here’s how the newest chips can take advantage of the latest version of Bluetooth technology’s new functionality Read More...

Capacitive sensing in battery-powered devices--Design considerations

This article focuses on the effective use of the capacitive sensor electrode reference (battery ground) and presents another variable reference introduced by the user (earth). Read More...

How to select flexible cable assemblies

With flexible cables instead of semi-rigid ones, assemblers can draw 2D knowing that when the cable is installed, it can be easily bent to fit correctly. But what should you look for in flexible cable? Read More...

Single-box tests analog and digital radio

Portable instrument tests analog and digital radio for RF power, FM deviation, VSWR, return loss, insertion loss, and others. Read More...

LTE devices may interfere with cable TV

There have been reports of LTE phones interfering with consumer set-top boxes. A paper presented at the 2014 IEEE EMC symposium describes the problem, the test procedure, and test results. Read More...

Book Excerpt: Sevick’s Transmission Line Transformers, Chapter 9 Baluns, Part 2

This chapter excerpted from Sevick’s Transmission Line Transformers describes the balun as a subset of transmission line transformers with an in-depth treatment of most used types. Read More...

The Circuit Designer's Companion: RF cables, twisted pair and crosstalk

Part 5 of an excerpt from the book "The Circuit Designer's Companion, 3rd Ed." looks at coaxial cables, twisted pairs, and the issue of crosstalk and how to combat it. Read More...

Network tester scrutinizes 10 Gbps optical networks

The MT1000A Network Master Pro from Anritsu, together with the MU100010A test module, provides all the capabilities required for field testing an OTN. Read More...

Intro to LTE-Advanced

How do we achieve higher capacity mobile phone performance with the LTE-Advanced (LTE-A) specification from the 3GPP? Read More...

Book Excerpt: Sevick’s Transmission Line Transformers, Chapter 9 Baluns

This chapter excerpted from Sevick’s Transmission Line Transformers describes the balun as a subset of transmission line transformers with an in-depth treatment of most used types. Read More...

Four 400G quandaries to look forward to

With 100 GbE now developed and in deployment, we can now peek ahead to what's next. Read More...

DigRF devices need RF and protocol tests

The transition from wireless analog to digital requires protocol testing from the physical layer to the application layer. Read More...

Deliver at 100G: The impact of smart memory

With new developments in serial memory solutions, middleware systems can now buffer, process packets, and steer traffic to general purpose CPU arrays 2-10 times faster than previous 10G or 40G solutions. Read More...

Wearable computing meets Bluetooth Smart

The increasing popularity of wearable computing devices such as smart watches demands a technology like Bluetooth Smart to power a multitude of applications without draining battery life. Read More...

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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...

Small, 915-MHz antenna beats monopole

A 915-MHz data-acquisition project required a small antenna, but the available antennas lacked the necessary characteristics: efficiency, compactness—that is, smaller than a standard 3-in. monopole—with adequate bandwidth, and with amenability to modeling by inexpensive NEC-2 antenna software. Read More...

Automotive link uses single wire

In the automotive industry, in which the goal is to produce cars with simpler, lighter wiring looms, any interface that uses just one wire instead of two offers a distinct advantage. The circuit in Figure 1 implements a bidirectional link using a single wire, with the car's chassis or ground conductor providing a negative return path. Read More...

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IoT dev kit enables rapid prototyping

Broadcom Corporation has introduced a development kit into its Wireless Internet Connectivity for Embedded Devices (WICED) family to enable developers to rapidly prototype ideas and concepts for IoT devices and applications. Read More...

Sub-1V BLE RF transceiver IP targets wearable sensors, IoT

CSEM (Switzerland) has announced IcyTRX-65, a 2.4-GHz silicon RF IP optimised for low power Bluetooth Smart (Bluetooth Low Energy) circuits. Read More...

Linear Technology 92mW direct conversion I/Q modulator

Linear Technology’s latest I/Q modulator is an energy saver for battery-powered transmitters operating in the 30MHz to 1.3GHz frequency bands. Read More...

Single-box tests analog and digital radio

Portable instrument tests analog and digital radio for RF power, FM deviation, VSWR, return loss, insertion loss, and others. Read More...

LED-fitted passive RF-field detector tag offers visual feedback

Equipped with a bright LED, whenever Farsens' Photon RFID tag comes close to an RF field source, it harvests energy from the RF field and drives its LED according to the field’s strength. Read More...

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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...

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...

Plugging hardware-based compression into a server

Prying Eyes gets an early look at a forthcoming PCIe-based hardware accelerator for the open-source GNU-zip algorithm. Read More...

Seeking the secrets of a satellite receiver

DirecTV set-top-box design focuses on modularity for the mass market. Read More...

Wireless USB in a dongle

A dongle that turns a USB port into a wireless base station has to exploit the greatest possible level of integration. Read More...

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Bluetooth v4.1: What developers need to know

Here’s how the newest chips can take advantage of the latest version of Bluetooth technology’s new functionality Read More...

How to select flexible cable assemblies

With flexible cables instead of semi-rigid ones, assemblers can draw 2D knowing that when the cable is installed, it can be easily bent to fit correctly. But what should you look for in flexible cable? Read More...

Deliver at 100G: The impact of smart memory

With new developments in serial memory solutions, middleware systems can now buffer, process packets, and steer traffic to general purpose CPU arrays 2-10 times faster than previous 10G or 40G solutions. Read More...

5 guidelines for DPI development and deployment

Here are some ideas on how to navigate deep packet inspection (DPI) solutions in a network functions virtualization (NFV) and software defined networking (SDN) world. Read More...

Microwave product roundup: IMS2014

The IEEE MTT International Microwave Symposium took place in Tampa, FL. If you weren’t able to make the Expo, here are some products making news. Read More...

Improve 400 GbE and 100 GbE performance: Product How To

A look at the high efficiency GigaChip Interface and how to address the requirements of next-generation equipment with an intelligent memory architecture. The product example used is the MoSys 3rd Generation Bandwidth Engine IC. Read More...

Designing for IoT—Part IV—The Cloud

Some IoT systems may not need back end services, but the majority of the currently envisioned IoT systems rely on the collection, processing and usage of data by the IoT devices and for this, some form of Information Technology different than embedded systems is required Read More...

Designing for IoT—Part III—Internet Usage and Protocols

This segment looks at the Internet, its usage by IoT devices, and the existing and new Internet protocols supporting the explosive growth of this new industry. Read More...

Addressing expanding wireless data usage? Turn To carrier grade Wi-Fi

The HEW study group started discussions of possible technologies that could address the requirements of Carrier Grade Wi-Fi (CGW). This article discusses promising candidates. Read More...

Getting to know the IoT

It’s time to take in some education on the Internet of Things. Read More...

Watching software defined networking take hold

SDN is being touted as a disruptive technology that will, once implemented, allow corporations to lower IT costs and be more responsive and flexible. Read More...

Perspective from MWC: Movea’s motion processing play

Movea’s team sat down with EDN to talk about its roadmap and how its sensor hub architecture fits within a number of market segments catching attention at the Mobile World Congress. Read More...

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Staggering rise in Internet traffic – forecast to pass one zettabyte in 2016

Video, the Cloud, and the Internet of Things are all driving the upward trajectory of data usage globally that will surely continue to rise past 2016. Read More...

The promise of the connected car

A recent forum at the Churchill Club in the San Jose area discussed the Connected Car and the practical realization of the phrase. Read More...

Peregrine flies to Murata

Today, we have news that Peregrine Semiconductor will be purchased by Murata. Here’s a reflection on where they’ve been. Read More...

Is a shark biting your product?

In the category of unexpected hazards, sharks are biting into undersea optical-fiber cables. Are the sharks sensing the electric field, or just checking out what's new in their play area? Read More...

ULP wireless: over-the-air software upgrades

Revising an ultra low power (ULP) wireless chip’s software in the field has been difficult. But new technology will make it routine - to developers’ and consumers’ benefit alike Read More...

LTE devices may interfere with cable TV

There have been reports of LTE phones interfering with consumer set-top boxes. A paper presented at the 2014 IEEE EMC symposium describes the problem, the test procedure, and test results. Read More...

Intro to LTE-Advanced

How do we achieve higher capacity mobile phone performance with the LTE-Advanced (LTE-A) specification from the 3GPP? Read More...

Wzzard sensing platform accelerates IoT development

While IoT advances are consistently in the news, it is this level of innovation that will continue to accelerate IoT adoption. Read More...

Intro to airborne radar

George Stimson’s Introduction to Airborne Radar is now in its third edition. Here’s a look at how SciTech worked with a team of radar and EW engineers to update the latest version of this venerable text. Read More...

Quick & dirty cable length & impedance measurement

Can't afford a full-blown TDR? Here are a few quick & dirty measurement tips. Read More...

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