User's Manual

3CC12425AAAA TQ BJA 01 Issue 01 - April 2001 - Draft 03 17/70
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2.3 – A7390 System specifications
2.3.1 – Frequency bands used
2.3.2 – Radio transmission specifications (typical values)
The following table gives the main characteristics of the A7390 wireless system.
A downstream (BS to TS) carrier is combined with up four upstream (TS to BS) carriers.
Cross-polarized radio Down-link Up-link
LMCS/AB 27 850  28 350 27 350  27 650
LMCS/F 25 600  25 850 25 350  25 600
LMCS/C 27 100  27 350 26 850  27 100
LMDS/A 27 500  28 350 31.075  31 225
LMDS/B 31 225  31 300 31 000  31 075
38/700/1 39 700  40 000 39 000  39 300
Downstream
Channel bandwidth 14 MHz 28 MHz
Occupied bandwidth 13.63 MHz 27.25 MHz
Roll-off factor 35% 35%
Modulation QPSK QPSK
Gross bit rate 20.19 Mbit/s 40.37 Mbit/s
Inner Code Convol. 7/8 (k=7) Convol.7/8 (k=7)
Interleaving depth 12 depth 12
Outer Code Reed-Solomon (204,188,8) Reed-Solomon (204,188,8)
Bit rate before coding 16.19 Mbit/s 32.38 Mbit/s
Radio
25 GHz 28 GHz 31 GHz 39 GHz 25 GHz 28 GHz 31 GHz 39 GHz
X-Pol RBS output power
(antenna port)
17 dBm 17 dBm 17 dBm 17 dBm 17 dBm 17 dBm 17 dBm 17 dBm
Transmit antenna gain 21 dB 21 dB 21 dB 21 dB 21 dB 21 dB 21 dB 21 dB
Receive antenna gain
(with radome)
36 dB 34.5 dB 35 dB 34.5 dB 36 dB 34.5 dB 35 dB 34.5 dB