Frequency hopping can reduce the influence of multipath fading. （)

A.4*3

B.7*3

C.1*3

D.MRP

A.Gain of both frequency diversity and interference diversity

B.Gain of frequency diversity only

C.Gain of interference diversity only

D.Neither gain of frequency diversity nor gain of interference diversity

A.Dynamic power control

B.Frequency hopping

C.Hysteresis

D.Cell load sharing

E.Discontinuous transmission

A.Discontinuous Transmission

B.Hysteresis

C.Dynamic Power Control

D.Frequency Hopping

E.Cell Load Sharing

A.More reasonable frequency planning

B.Declination of the antenna for the interfering cell

C.Use of frequency hopping technology

D.Elevation of the antenna for the interfering cell

E.Decrease of transmission power of BTS for the interfering cell

A、Handover

B、Dynamic Power Control

C、Discontinuous Transmission

D、Cell Load Sharing

E、Frequency Hopping

A.In the GSM system, the time diversity is implemented using the frequency hopping technology.

B.In the GSM system, there should be an interval of 3 timeslots for the mobile station to receive and send signals.

C.The GSM system provides encryption measures. The encryption sequence is generated by the encryption key Kc and frame. number through the A8 algorithm.

D.The multiple access mode of GSM is the combination of FDMA and CDMA

A.CDUG

B.CDUJ-9

C.CDUF

D.CDUA

rable？ according to the following outline (given in English ). Your composition should be no less than 120 words. Remember to write your composition on the Answer Sheet ! clearly and neatly.

1. Some people tend to stick to one job in their lives.

2. Other people prefer changing jobs constantly.

3. My opinion.

Is Job-hopping Preferable？

ne device.

A．Y

B．N

C．NG

（)a kind of frequency sync technique, encloses clock frequency in special（)packets and

strip it off if necessary to implement transparent transmission of clock frequency on PSN.