New Spectrum Status for FCC Regions by Rick Murphy UNII-2B is dead. For more than 4 years, the U.S. Wi-Fi community has anticipated the Federal Communications Commission (FCC) would soon allow unlicensed access to the 5.3 GHz band (5350-5475 MHz) commonly referred to as UNII-2B. This expectation was originally sparked by wording in the 2013 FCC Report & Order […]
Current status of the IEEE 802.11 Task Groups Current Status of the IEEE 802.11 Task Groups (- reprint -) The current roll-up of the 802.11 standard, IEEE Std P802.11-20176 was published in December 2016. This update to the 802.11-2012 standard now adds two new Physical and MAC layer specifications and three, mostly, MAC layer […]
Exploring 802.11-2016 Amendments – Overview of 802.11ad-2012 Those who are serious about making Wi-Fi work properly, must become students of the 802.11 standard. No matter how hardware manufacturers rebrand the features and services of Wi-Fi as something they invented, all critical interactions between Wi-Fi STAs are blueprinted by the carefully worded clauses that compose the […]
IEEE Std 802.11-2016 now available for free download The latest roll-up of the 802.11 standard is now available for download, free of charge at: http://standards.ieee.org/findstds/standard/802.11-2016.html . This version replaces 802.11-2012 and includes all of the amendments published between 2011-11-11 and 2016-09-01. Those were: 802.11aa-2012 – Video Transport Streams 802.11ae-2012 – Prioritization of Management Frames 802.11ac-2013 […]
Spreading Out with 802.11n/ac Figure 29: Spectrum Density View of OFDM Overview of Parts 5 and 6 The last two parts of this tutorial will show the evolution from Legacy (802.11 and 802.11b) and Classical (802.11a and 802.11g) WLAN protocols to our current state of the science, which began with the release of 802.11n in […]
RF Noise – The Sound of Silence Figure 17: Noise floor with 802.11 signal in Channel 11 Overview of Radio Energy In the previous episode of “Understanding OFDM”, we discussed the effects that convolutional coding error correction has on our overall channel data rates. The reason for using an error correction mechanism is to attempt […]
So You Say You Want a Convolution Figure 12: Bits to Encode In Part 2 of this series, we determined the maximum baud rate for 802.11a/g, and calculated the maximum channel data rates by modulation type. As an example, if using a BPSK modulation type we arrive at raw channel data rate of 12 Mbps, […]
Figure 5: OFDM Waveform Introduction OFDM is simple in theory. A fast, serial data stream (your baseband user data for instance) is divided by means of a “serial-to-parallel” conversion, into multiple, slower data streams. In addition, the allocated RF channel, which in 802.11a/g is 20 MHz wide, is divided into many smaller frequency groups known as […]
Part 1 – The 48-string Guitar Figure 1: Imaginary Acoustic Guitar Like the sidewalk under your feet, rock solid and trustworthy, Orthogonal Frequency Division Multiplexing (OFDM) is the foundation that supports all current high-performance wireless technologies, including 802.11n, 802.11ac, 802.11ad, and even LTE. OFDM was incorporated into Wi-Fi with the advent of 802.11a in 2001 […]
Using AirWISE (WiTS Video Tip #3) from Scott Williams on Vimeo. WiTS has produced “WiTS Video Tips #3.” This a short training video utilizing AirWISE inside of AirMagnet Survey Pro. This video was created by Jerrett Fancher, an official AirMagnet Certified Instructor from www.wirelesstrainingsolutions.com.
Using AirMagnet Reports (WiTS Video Tip #2) from Scott Williams on Vimeo. WiTS has produced “WiTS Video Tips #2”, a practical short training video utilizing reports inside of AirMagnet Survey Pro. This video was created by Jerrett Fancher, an official AirMagnet Certified Instructor from www.wirelesstrainingsolutions.com.
WiTS has produced “WiTS Video Tips #2”, a practical short training video utilizing reports inside of AirMagnet Survey Pro. This video was created by Jerrett Fancher, an official AirMagnet Certified Instructor from www.wirelesstrainingsolutions.com. WiTS is the official training provider for AirMagnet Training Academy. We have taught thousands of AirMagnet students how to properly survey, design, […]
802.11ac is one of the new physical layer amendments being worked on by the IEEE. Although completion of the amendment is not expected until next year, some vendors are already offering hardware based on the initial drafts of this work. What are the new features and capabilities that make “ac” so interesting? Join AirMagnet Academy […]
Remember the Olympic ban on WiFi hotspots to ensure the games’ corporate sponsors could sell you back access at a premium? Click Here to Read More
Click here to see what Devin Akin, Chief Wi-Fi Architect at Aerohive Networks had to say about Wireless Training & Solutions web-based Wi-Fi channel simulator.
Wireless LANs use the license-exempt radio bands shared by various consumer-grade transmitters. These devices can have a serious negative effect on the performance of your WLAN. In order to isolate these noise sources you need a mobile spectrum analyzer with fast response and an internal expert system that automatically identifies the type of transmitter causing […]