WorksheetsPractice for Chapter1,2,3- Wireless Communication/Adhoc
Total questions: 20
Worksheet time: 20mins
Which is the last component in the creation of the wireless medium?
Receiver
Transmitter
Antenna
radio waves
Which is the component that do passive gain of the wireless medium?
Receiver
Transmitter
Antenna
radio waves
Which is the component that do active gain and is the starting of the wireless medium?
Receiver
Transmitter
Antenna
radio waves
How will be the Electrical (E) field of radio waves aligned if the antenna is vertically polarized ?
E field will be parallel(same alignment) to the earth
E field will be perpendicular(90 degrees) to the earth
E field will be not aligned to the earth
No E-field at all
Which field of radio waves will be aligned for antenna polarizion ?
E field
M Field
earth gravity
North pole
If a wireless signal is having the Electrical-field parallel
to the earth, which type of antenna you will purchase?
Horizontal polarized antenna
Vertical polarized antenna
Any antenna
No need for antenna
When multiple RF signals arrive at the receiver at the same time and are in phase or partially out of phase with the primary wave, what can be the result?
can be an increase or gain in amplitude
can have decrease or attenuation in amplitude
No change in amplitude
No effect in amplitude
During multipath if RF signals arrive at the receiver at the same time and are completely out of phase with the primary wave, what can be the result?
can be an increase or gain in amplitude
can have decrease or attenuation in amplitude
No change in amplitude
No effect in amplitude
Which device operate at the lowest power?
WiFi 802.11 devices
Commercial radio stations
Commercial TV stations
Licensed walkie talkie broadcasts
Unit of loss of signal is usually measured in?
dB
Watt
Voltage
Ampere
Unit of power of signal is usually measured in?
dB
Watt
Voltage
Ampere
Which is the property called as multiple reflection?
Scattering
Reflection
Refraction
Diffraction
Which are the organizations that manage the radio spectrum frequencies in Oman?
FCC
ISO
TRA
Omantel
Which is a theoretical reference antenna that radiates energy equally in all direction?
Isotropic antenna
Directional antenna
Multipartite antenna
Hertzian dipole
Which is the process of adding the data to a carrier signal to form the modulated waveform?
Encoding
Decoding
Demodulation
Waveform
What is the name of the chipping code that is used to achieve rates of 2 Mbps, and uses 11 chips when encoding the data?
Barker code
CCK
Chips
Data code encode
What is the name of the chipping code that is used to achieve rates of 11 Mbps, and uses 64 unique code words when encoding the data?
Barker code
CCK
Chips
Data code encode
Which encoding technique is used for 802.11 (WiFi), GPS, Cordless?
DSSS
FHSS
OFTM
MIMO
Which are the organizations that manages and controls protocols like multimedia content over Wi-Fi networks- Wi-Fi Multimedia (WMM), WPA2, 802.11n etc?
FCC
ISO
TRA
WiFi alliance
The timing of the signal between peaks is called by _________
Phase
Amplitude
Frequency
Power
