RF Standards

12 important questions on RF Standards

Hoeveel subchannels zitten er in een 20 Mhz OFDM 802.11a/g kanaal?

48 bruikbare, maar er zitten ook guarding en spacing subchannels

What are the key components of the second wave of 802.11ac

Max Spatial: 4. Max Channel Aggregation: 160 Mhz. Max modulation: 256-QAM MU-Mimo: Yes. Max dataspeed: 2.6 Gbps

As a global Wifi Citizien, in which Regulation Domain could you live best?

In the S Domain: The most channels :)
S (S regulatory domain):

●2.412 to 2.472 GHz; 13 channels
●5.180 to 5.320 GHz; 8 channels
●5.500 to 5.700 GHz;, 11 channels
●5.745 to 5.825 GHz; 5 channels
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What are the ISM frequencies?

5.725 t/m 5.825 Ghz U-NII-3
2.400 t/m 2.500 Ghz

What is the Mhz spacing on the 2.4 band?

5 MHz

How many subchannels are there in the 2.4 band?

1 t/m 14
2.412 , 2.417 , 2.422 .. 2.472; 2.484

Whats the difference between adjacent channels and neighboring channels?

Adjacent are non-overlapping, where neighboring channels can overlap

Explain what the Fresnel Zone is

That is a cone-shaped elyptical range around the wifi sight-to-sight signal, which still should be clear of object caused by diffraction and such if the object is present in the Fresnel zone.

What common name technology uses IEEE 802.16

Wi-Max

What common name technology uses IEEE 802.15

Zig-Bee, Bluetooth

Name all Wireless Networks topologies

WPAN, WLAN, WMAN, WWAN (You also have a NAN; Near-me Area Network like Wifi Direct)

Which service set BSS, ESS or IBSS will an ad-hoc network form/use?

IBSS

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