A. FDMA+TDMA
B. FDMA
C. TDMA
D. CDMA
A. True
B. False
A. ADPCM
B. EVRC
C. RPE-LTP
D. MPEG4
A. Mobile station access failed several times
B. The bit error rate on the downlink is too high (the mobile station cannot decode the paged information)
C. The cell becomes occluded
D. The C2 of another cell is better than the C2 of the current cell for more than 5 seconds.
A. 900M/1800M dual-frequency network co-site base station cannot use dual-frequency dual-polarized antenna
B. BSC 900M/1800M dual-frequency network cells can use the same location area
C. CO-BCCH networking can save common control channels
D. CO-BCCH cell frequency hopping can use a MA group
A. When the noise figure of the tower top amplifier is small, the noise coefficient improvement of the base station receiving system is more obvious after the tower top amplifier is increased, and the noise figure of the tower top amplifier is too large, which may cause the noise figure of the base station receiving system to deteriorate;
B. When the base station feeder is long and the feeder loss is large, after the tower top amplifier is increased, the noise figure improvement (reduction) of the base station receiving system is more obvious, and the uplink improvement is obvious;
C. The tower top amplifier reduces the noise figure of the base station receiving system, thereby improving the receiving sensitivity of the base station system;
D. When the base station's own noise figure is small (ie, the receiving sensitivity is high) and the feeder is short, the improvement of the noise figure of the receiving system of the base station after the increase of the towering amplifier is great.
A. Call
B. Location update registration
C. Authentication
D. Call setup
A. RSL
B. MML
C. OML
D. ESL
A. Big, big
B. Small, small
C. Big, small
D. Small, big
