單項(xiàng)選擇題A particular cell is expected to support 6 Erlangs of traffic at 1% Grade of Service. How many traffic channels are required?（）

A. 6 
B. 13 
C. 3 
D. 15 
E. 22


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2.單項(xiàng)選擇題Which type of interference is produced by other transmitters on the same frequency? （）

A. Double interference
B. Co-channel interference
C. Adjacent channel interference
D. Reflected interference
E. Timing interference

4.單項(xiàng)選擇題How many ARFCNs can an operator use if allocated 15 MHz uplink and 15 MHz downlink (minus one for guardband)? （）

A.14 ARFCNs
B.15 ARFCNs
C.29 ARFCNs
D.75 ARFCNs
E.74 ARFCNs

5.單項(xiàng)選擇題Which of the following will not increase system capacity? （）

A. Increasing the number of available frequencies.
B. Changing the modulation scheme.
C. Implementing half rate vocoders
D. Going from a 4/12 to a 3/9 reuse pattern.
E. Splitting cells