Cellular Communication

Single high-power transmitters are used in

• Pre-cellular era

• Cellular era

• Internet era

If a total of 33MHz of bandwidth is allocated to a particular FDD/FDMA cellular system which uses 50 KHz duplex channels. Determine the number of duplex voice channels available per cell if the system uses 7 cell reuse.

• 95

• 55

• 65

If 120 degree sectoring is used in a 7 cell reuse cellular system, then determine the number of first tier co-channel cells that interfere with the center cell.

• 2

• 3

• 6

Choose the incorrect answer. Co-Channel interference reduction factor Q

• when small, decreases CCI

• = D/R

• when small, provides larger system capacity

• when small, increases co-channel interference (CCI)

Base station covers a certain transmission area called ________.

• Cell

• Cluster

• Sector

In Microcell Zone, as mobile travels from one zone to another, it requires

• No handoffs

• Soft handoffs

• Hard handoffs

Measure the traffic in Erlangs, if a radio channel is occupied for 45 minutes during an hour.

• 0.75 Erlang

• 0.5 Erlang

• 0.2 Erlang

The gain of an antenna specified by the manufacturers refers to

• Maximum gain

• Minimum gain

• Average gain