Hello Sir, since the concept behind TV White space is to utilize the unused spectrum in the VHF and UHF band, can wireless devices such as a laptop Wi-Fi network card receive such frequency or will an external device such as a modem be needed?
If such Wi-Fi network card has specification for reading frequency spectrum otherwise an portable handheld frequency Analyser will be adequate to detect the unused spectrum.
The deployment should be done when the primary users are transmitting so as to avoid interference with the secondary (Unused spectrum).
Very different frequency bands involved here.
TV white spaces are in the UHF band mostly, so that's in the 470 MHz to 700 MHz range, more or less, depending on country.
WiFi operates in the 2.4 GHz band, for IEEE 802.11b, 802.11g, and 802.11n, and in the 5 GHz band for 802.11a, 802.11n, and 802.11ac.
So yes, the TV white spaces could be used for the long haul Internet broadband connection, and for that, take a look at the IEEE Standard 802.22. It should be quite feasible to go from an 802.22 transceiver/router to a WiFi access point, to serve a household with Internet broadband service.
These IEEE standards are all available online, at:
http://standards.ieee.org/about/get/802/802.html
Dear James,
Adding to what has been said before, white spaces in licensed frequency bands belonging to the so called primary users can be used opportunistically by secondary users. This exploitation of such white bands is realized by the so called cognitive radio.
http://sutlib2.sut.ac.th/sut_contents/H133279.pdf
Best wishes
Dear James,
Albert Manfredi have provided all i needed to say. However, i may add this:
I have come across some designs for up/down converters. This would also help the 2.4GHz card to detect the TV band.
Dear James,
We developed tv spectrum sensor based on the tv tuner itself. For more information please follow the link:https://www.researchgate.net/publication/279180575_A_Modified_TV_Tuner_for_Spectrum_Sensing_in_TV_UHF_Bands
Best wishes
Article : A Modified TV Tuner for Spectrum Sensing in TV UHF Bands
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