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Wireless/Networking

Carolyn Mathas
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.

Crystal Oscillator Fundamentals and Operation—Part III

In Part III the discussion moves to a look at the various parameters associated with crystal oscillators and their impact on the end system design. Read More...

When will PAM4 take over from NRZ?

Every year, PAM4 threatens to replace non-return to zero signaling. It’s going to happen when multimoding kicks in. Read More...

Network probing can affect protocol testing

Probing problems that don’t exist at SAS 2.0 speeds can cause headaches at 12 Gbits/s SAS 3.0 speeds. Read More...

5G: What to expect

In this summary of a 5G roundtable held at Mobile World Congress IMEC program director for wireless communications, Dr. Liesbet Van der Perre, and University of Aveiro professor Dr. Rui Aguiar, a member of the Board of the 5G Public Partnership Project (5GPPP) discuss 5G technologies. Read More...

See the crosstalk in 100GbE

Thrill to a real-time view of time-varying 25Gb/s crosstalk. Read More...

How much attenuation is too much?: Rule of Thumb #10

This rule of thumb enables us to estimate how much attenuation is in the loss budget of a serial channel. Read More...

Multicoax connector takes multiport testing from DC to 18 GHz

Huber+Suhner’s MXP series is designed for the high speed digital testing market. Read More...

Product How-to: Sophisticated tools accelerate SDR exploration

A pair of integrated, single board, Universal Software Radio Peripheral platforms provides continuous frequency coverage from 70 MHz to 6 GHz, while supporting powerful design and evaluation tools. Read More...

Design Verification Testing of GPS Receivers

Anyone can sell a GPS receiver product that would be unable to hear signals and be completely non-functional. It could work most of the time, just not all the time, and not in any predictable way. Design verification testing to the rescue. Read More...

The inexorable rise of the appcessory

2014 will be a landmark year for Bluetooth Smart and the silicon vendors behind the technology Read More...

Security demands hardware improvements

High performance security features – integrated into silicon hardware – allow network managers to more thoroughly and more intelligently inspect, encrypt, authenticate and secure Internet traffic at wire speeds. Read More...

Loss in a channel: Rule of Thumb #9

This rule of thumb enables us to estimate the attenuation at the Nyquist for a lossy, uniform channel. 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...

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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...

Use a PIC for automatic baud-rate detection

Automatic baud-rate detection is desirable in many applications. Microchip's standard USART used in most of its PIC microcontrollers lends itself to a simple baud-detection scheme. Read More...

Chip recorder customizes phone ringer

Companies usually purchase one type of telephone for all employees, which is understandable, especially if they obtain a discount for buying in quantity. One ringer sound for everyone can pose a problem, though, if the sound of a ringing phone makes a dozen people pause and look at their telephones. Equally annoying is the absence of a visual message indicator. Read More...

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Low-power GPS modules target wearables

CSR and OriginGPS aim to accelerate the adoption of wearable devices with small-form-factor and low-power GNSS modules that have integrated antennas, reduce typical size by 70% and offer uprated performance. Read More...

Power connector provides 60A to backplane line cards

Molex' EXTreme OrthoPower design solves a high-current delivery problem; the orthogonal direct-power connector configuration uses split-blade technology to deliver 60.0A total power to backplane line cards. Read More...

Multicoax connector takes multiport testing from DC to 18 GHz

Huber+Suhner’s MXP series is designed for the high speed digital testing market. Read More...

Tiny, smart, highly integrated Wi-Fi module

The EC19W01 from Econais Inc., claims to be the smallest, smartest and most integrated 802.11b/g/n Wi-Fi System In Package (SiP) module available. Read More...

Agilent debuts high-end oscilloscopes at OFC

High bandwidth, low noise, and a new user interface grace to Infiniium Z-Series. 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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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...

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...

Getting to know the IoT

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

MWC: The promise of NFC

One of the topics of conversation popping up at the 2014 Mobile World Congress is the promise of near field communication technology. Read More...

Designing IoT—Part II—The Thing

Here is Part II of a four-part series on Designing IoT. This segment concentrates on exactly what is it that’s hanging off of IoT—The thing itself. Read More...

Designing IoT—Part 1--IoT Devices and Local Networks

This article will look at the end devices in an IoT system from the embedded developer point of view. The complete article has four parts, divided along the same grouping found in Figure 1. To understand well the thing, we need to understand the communication technologies in play. Read More...

Software-Defined Networking in Mobile—The Basics

This article takes a fresh look at software-defined networking (SDN), the primary concepts, and how these concepts can be used to enhance wireless networks in the immediate future. Read More...

Use digital predistortion with envelope tracking

Here’s a look at the technical advantages and disadvantages of Digital Predistortion (DPD) in the RF front end of mobile handsets, as well as the wider implications of vendors choosing the DPD route, and how it can be used in conjunction with Envelope Tracking. Read More...

How to overcome memory-imposed access rates and bandwidth constraints

Traditional memory interfaces are a burden to performance as they’re plagued by slow speeds, lengthy latency, and high pin counts. Conventional design approaches to implementing external memory have already reached the point of diminishing returns. Now what? Read on. Read More...

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