TV White Space (TVWS) Internet: Definition and Features

This page describes the TV White Space Wireless System and its application as TV White Space Internet.

TVWS stands for TV White Space. White Spaces refer to the unused portions nestled between occupied channels in the radio frequency spectrum.

Here are the key features of a White Space Wireless System:

• It can operate in both Non-Line-of-Sight (NLOS) and Line-of-Sight (LOS) paths.
• The frequency spectrum used is unlicensed, much like WiFi.
• It brings broadband internet access to areas obstructed by mountains and buildings.

Due to its use of the unused “white spaces” within the TV spectrum, this technology is also known as TV White Space Internet.

• It requires minimal infrastructure for deployment.

• The figure above illustrates a block diagram of a TV White Space Internet system.
• As shown, it uses a TVWS Base Station, which connects to the internet backbone.

The Base Station is interfaced with a white space antenna. The antenna transmits internet data, modulated and encoded to fit within the available white space spectrum, determined by analyzing the gaps between occupied TV channels.

• The encoded and modulated signal is received by the corresponding TVWS CPE (Customer Premises Equipment).
• A computer or laptop connects to the CPE, allowing users to browse the internet.

Also, see 802.11af WLAN, which utilizes the same concept in WLAN frequency spectrum.

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