Review of Wireless systems and Wireless spectrum

1.       Identify the network/radio challenge from the following:

• Seamless handoff

• Complexity

• Size and cost

• Multi-radio integration

1.       Choose the correct answer. Turbo codes are used in

• 3G

• 1G

• 2G

• 5G

Identify the wrong answer. Cellular systems can minimize energy by

• Using macro cells

• Using pico cells

• Using relays

• Using DAS

Wifi-6

• 802.11ax

• 802.11ac

• 802.11n

• 802.11b

1024 QAM modulation is used in

• 802.11ax

• 802.11ac

• 802.11n

• 802.11b

The satellite that remain in the same position relative to the earth surface is,

• GEO satellite

• LEO satellite

• MEO satellite

• Nano satellite

Recall the correct frequencies of Ku band.

• Uplink 14 GHz and Downlink 11 GHz

• Uplink 11 GHz and Downlink 14 GHz

• Uplink 6 GHz and Downlink 4 GHz

• Uplink 4 GHz and Downlink 6 GHz

Channel access mechanism for Zigbee is

• CSMA-CA

• CSMA-CD

• CDMA-CA

• CDMA-CA

Choose the correct number of devices per network in a Zigbee network

• 255

• 250

• 8

• 10

Global spectrum allocation is managed by

• ITU-R

• TRAI

• FCC

• ETSI