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.

Teardown: Inside a DSL gateway

An aversion to integrated gateways presents a teardown opportunity and a good look at the PCB that makes the unit go. Read More...

Simulate automotive electrical noise on the bench

The AIGN-5000 series from Spirent Communications let you inject interference into automotive Ethernet links for testing engine control units. Read More...

PAM4: Symbol levels and voltage compression measurements

PAM4 measurements continue to evolve. Here are two ways to measure symbol level, separation, and nonlinearity, and which is best. Read More...

FFT: Equations and history

Most engineers have used the FFT, but what's behind the signal processing and how did it evolve? Read More...

How does the ESC "Hello There!” badge work?

Discover the cornucopia of apps that will be pre-loaded onto the wirelessly networked ESC "Hello There!" badges. Read More...

Oscilloscope tricks 21 to 30

Get more out of your oscilloscope than you ever imagined. Read More...

Wireless signal analyzer supports LTE-A and 4x4 MIMO

Anritsu has strengthened the wireless test functions of its all-in-one Radio Communication Analyzer MT8821C with the release of four new software packages for evaluating LTE-Advanced UE supporting downlink (DL) 4x4 MIMO and Downlink Carrier Aggregation (DL CA) 5CCs. 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...

Apple vs FBI: When privacy and safety collide

Where do you weigh in on Apple’s refusal to unlock the iPhone for the FBI? Read More...

Switching from iOS to Android

A dead iPhone 4S prompts a migration to an Android handset. See how it’s going so far. Read More...

Exclusive: Apple secretly working on “backdoor” phone access

Here's an inside look at the backdoor techniques now under consideration by Apple. Read More...

You can't think out of a box built of TLAs

Success in the 21st century is built on innovation but every industry builds TLA walls that stifle creativity. Read More...

OFC 2016: OIF shows off 56G PAM4, NRZ

The next generation of high-speed digital communications could be a mix of 56 Gbps PAM4 and NRZ modulation. The Optical Internetworking Forum demonstrated both forms at OFC 2016. Read More...

Spectrum analyzers come in several form factors

The SPECTRAN V5 real-time spectrum analyzers from Aaronia USA are available in handheld, rugged, USB, and OEM packages. Read More...

USB spectrum analyzers cover the bench and the field

Battery-powered and line-lowered instruments let you perform field or bench measurements for wireless devices. Read More...

Home automation control on the go

WeMo home automation technology is a bit pricey, and doesn't offer "power user" features, but its ease of use is certainly appealing to the masses. Read More...

OFC 2016: PAM4 is the new binary

PAM4 modulation, which practically took over DesignCon 2016, tightens its grip on optical communications. Read More...

Apple's "Let Us Loop You In" not exactly surprising

Although there were no big surprises in Monday's Apple intro event thanks to supply chain and developer leaks, the event wasn't completely drama-free. Read More...

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...

>> SEE ALL

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...

>> SEE ALL

Diode array offers robust TVS protection

The SP4042 TVS diode array from Littelfuse absorbs lightning surges up to 120 A (2/10 µs) without degradation and withstands ±30 kV of ESD. Read More...

Wideband digital receiver fits PXIe format

The M9203A 12-bit digitizer/receiver from Keysight Technologies samples at up to 3.2 Gsamples/s with up to 2 GHz of instantaneous bandwidth. Read More...

Wireless signal analyzer supports LTE-A and 4x4 MIMO

Anritsu has strengthened the wireless test functions of its all-in-one Radio Communication Analyzer MT8821C with the release of four new software packages for evaluating LTE-Advanced UE supporting downlink (DL) 4x4 MIMO and Downlink Carrier Aggregation (DL CA) 5CCs. Read More...

VNA test cables have long flex life

Rated to 50 GHz and 67 GHz, VNA test cables from Pasternack withstand the rigors of test-lab use where cables are constantly flexed. Read More...

Oscilloscope probes fit tight spaces, come with S-parameters

The P7700 series of probes from Tektronix let you probe high-speed signals, put the amplifier at the tip, and let you compensate for losses through unique S-parameters for each probe tip. Read More...

>> SEE ALL

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...

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...

>> SEE ALL

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...

Can all the wireless charging standards coexist?

When it comes to wireless charging, the question for many developers is whether or not the various standards like Qi and A4WP can coexist, and how to design for that. Read More...

LTE-A Release 12 transmitter architecture: analog integration

In part 2 of a series, Damian Anzaldo explains how LTE-Advanced Release-12 shapes eNode transmitter architecture, specifically in terms of the analog integration challenge. The article includes an example using a MAX5868 RF DAC transmitter from Maxim Integrated. Read More...

Understand LTE-A Release 12 transmitter architecture: Part 1

A technical look at the market forces driving global adoption of the LTE standard and trends in 4G radio access technology. Topics include carrier aggregation (CA), spatial multiplexing, and active antenna systems (AAS). Read More...

Network lifecycle management and the Open OS

The bare-metal switch ecosystem and standards are maturing, driven by the Open Compute Project. Pica8’s Steve Garrision sees Linux-based network OS software as transforming network economics and innovation for switches, just as it has done for servers. Read More...

Marvell shrink-wraps IoT gateway product

Marvell came to the International CES to pitch a ready-to-customize home server/home networking/IoT gateway system, called “Smart Home Cloud Center.” Read More...

Implement a VXLAN-based network into an SoC

Here’s how to eliminate bottlenecks in hyperscale cloud datacenter SoCs with VXLAN-based networks over 10G Ethernet IP Read More...

5 Bluetooth devices for the body at CES

At a pre-CES Bluetooth event, wearables and fitness devices were the stars of the show, with a few neat medical applications making waves. Read More...

How to virtualize network functions

Here’s how to use network functions virtualization (NFV) to take network functions that sit in dedicated appliances and relocate them as virtual instances, leading to increased flexibility, reduced CapEx and OpEx, and increased innovation. Read More...

>> SEE ALL

PAM4: Symbol levels and voltage compression measurements

PAM4 measurements continue to evolve. Here are two ways to measure symbol level, separation, and nonlinearity, and which is best. Read More...

Simulate automotive electrical noise on the bench

The AIGN-5000 series from Spirent Communications let you inject interference into automotive Ethernet links for testing engine control units. Read More...

Illumination Pattern

How would one find the area of a hypothetical ellipse created by an antenna's emitted RF? Read More...

How does the ESC "Hello There!” badge work?

Discover the cornucopia of apps that will be pre-loaded onto the wirelessly networked ESC "Hello There!" badges. Read More...

Apple vs FBI: When privacy and safety collide

Where do you weigh in on Apple’s refusal to unlock the iPhone for the FBI? Read More...

Switching from iOS to Android

A dead iPhone 4S prompts a migration to an Android handset. See how it’s going so far. Read More...

Exclusive: Apple secretly working on “backdoor” phone access

Here's an inside look at the backdoor techniques now under consideration by Apple. Read More...

You can't think out of a box built of TLAs

Success in the 21st century is built on innovation but every industry builds TLA walls that stifle creativity. Read More...

OFC 2016: OIF shows off 56G PAM4, NRZ

The next generation of high-speed digital communications could be a mix of 56 Gbps PAM4 and NRZ modulation. The Optical Internetworking Forum demonstrated both forms at OFC 2016. Read More...

The very short reach of 25 Gb/s

How the OIF-CEI very short reach 25+ Gb/s conductor technology plugs a big hole in 100G communications. Read More...

>> SEE ALL

FEATURED RESOURCES