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  • Tag: Radio Transmission

    Wi-Fi 6: High-Efficiency WLAN with IEEE 802.11ax [UPDATED]

    The 802.11ax brings important features, focusing on network capacity, latency and range. High data rates are still in the picture, but rather in the background. Introducing OFDMA and using MU-MIMO allows AP to schedule data for multiple users simultaneously. This way, latency can be greatly decreased. With the new colors of the channels, frequencies can be spatially reused.

    1
    Date: 07.04.2023

    Wi-Fi 6: Q&A

    What is Wi-Fi 6 (IEEE802.11ax)? How does it compare to Wi-Fi 5 (IEEE802.11ac)? Will older phones connect to Wi-Fi 6? The post combines the most frequently asked questions about Wi-Fi 6.

    Date: 02.06.2020

    Wi-Fi issues: site-surveys and troubleshooting

    Recently, we’ve been doing numerous site surveys and verification of Wi-Fi deployments in offices with more than 50APs per office in a managed setup (meaning that the APs are under the supervision of a wireless controller). In this post, I’d like to sketch an overview of the encountered issues and improvement suggestions.

    Date: 24.01.2020

    Why Wi-Fi 6 (IEEE802.11ax) will be different than previous Wi-Fis?

    The AP schedules the transmission according to the actual needs, and nobody wastes time on waiting and on collision. So, we end-up having the system that: is more robust towards low latency services; is more spectrally efficient; allows for actually use some QoS profiles; and coordinates the use of spectrum.

    Date: 02.06.2019

    How we ended up in WPA3? – Wi-Fi Security Evolution

    Introduction to Wi-Fi Security Distributing data using wireless medium means that anyone can capture the signal. There is no boundary, like in case of cable communication, which prevents unwanted access. This means we must take other security measures. In this blogpost we will review current algorithms providing Wi-Fi security and we will take a sneak […]

    3
    Date: 06.07.2018

    Wi-Fi Standards Evolution

    Introduction First Wi-Fi networks appeared in late 90s and many of us use them ever since. During these years we could observe significant increase of throughput, but what is important, it is not only due to the ISP providing better link. Wi-Fi standard also evolved to keep up with the higher throughputs. If there will […]

    4
    Date: 29.05.2018

    What Multiple Access schemes are used in Wireless Systems?

    Introduction Communication between devices is often discussed on link level, which means that the focus is on how two end points exchange information: what is the protocol, waveform, timing in sending messages etc. This however, does not take into account that there are other devices wanting to use the medium. Using the same medium by […]

    2
    Date: 05.04.2018

    How does OFDM work?

    After discussing the main wireless transmission concept (How wireless works?), main channel propagation phenomena (What is pathloss? and What is shadowing?), and antenna configurations (What is MIMO?), let’s now take a look at one of the most commonly used transmission scheme nowadays, namely Orthogonal Frequency Division Multiplexing (OFDM). But, before we explain why do we […]

    2
    Date: 15.03.2018

    About our new training: “Enterprise Wireless Advanced”

    The time has come to present our youngest initiative, a training course that binds together the two worlds – “Wireless” and “Networking”. Why this training is different? This unique course combines the theoretical foundations for the wireless transmission and Wireless LAN standards, together with the practical aspects ranging from measurement, planning and troubleshooting activities, to […]

    1
    Date: 15.01.2018

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