Wireless communication

Which of the following is/are the basic part(s) of cellular system

• Mobile unit

• Cell site

• Mobile telephone switching office

• All the above

In what frequency spectrum is divided into smaller spectra and is allocated to each user

• TDMA

• CDMA

• FDMA

• FGMA

In ___________ multiple access is achieved by allocating different time slots for the different users

• TDMA

• CDMA

• FDMA

• SDMA

The basic GSM is based on ____ traffic channel

• Connection oriented

• Connection less

• Packet switching

• Circuit switching

________ are typically characterized by very small system especially in very densely populated area

• 2G

• 3G

• 2.5G

• 3.5G

An antenna which attempts to direct all its energy in a particular direction is called

• Directional antenna

• One to one antenna

• Prpogational antenna

• Single directional antenna

Which mode is used for installing networks in wireless communication device characteristics

• Fixed and wired

• Mobile and wired

• Fixed and wireless

• Mobile and wireless

When all the radio channels are in use in a trunking system

• The user is blocked

• The access to the system in denied

• The queue may be provided

• All the above

Interference in cellular system is caused by

• Two base station operating in same frequency band

• Two calls in progress in nearby mobile stations

• Leakage of energy signals by non cellular systems into cellular frequency band

• All the above

Co channel reuse ratio depends on

• Radius of the cell

• Distance between the centers of the co channel cells

• Frequency allocation of nearest cells

• Both a and b