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| Propagation Effects
Replicator (QPER) |
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| Specifications /Technical Data
(Tentative) |
 |
Number
of channels:
|
1
to 8 per 19” / 7U unit, cascadable |
|
Number
of taps/channel:
|
choice
of 12 or 24 |
|
Number
of MIMO outputs/channel:
|
1,
2, 3 or 4 at IF level (joined sets of taps) |
|
RF
frequency range:
|
380
MHz…6 GHz (TETRA & DVB-H to WiMax) |
|
RF
bandwidth:
|
40
MHz (± 3dB, cutoff at 50 MHz) |
|
RF
input level:
|
-30
… +20 dBm |
|
RF
output level:
|
-153
… -20 dBm |
|
Total
attenuation:
|
-6
… 183 dB (-6…143 dB: better than 0.1
dB accuracy) |
|
Channel
delay:
|
0 … 655 µs in 0.1 ns steps (0…196.5
km light travel distance in 3 cm steps) |
|
Relative
tap delay:
|
0
…60 µs in 0.1 ns steps (0…18 km
light travel distance in 3 cm steps) |
|
Relative
tap attenuation:
|
-6
… 90 dB (-6…50 dB: better than 0. 1
dB accuracy) |
|
Relative
tap phase shift:
|
0
… 360°, better than 0.1°accuracy |
|
Doppler
shift (per tap):
|
0.1
Hz ... 10 kHz (corresponding to 0.12 ... 108000
km/h @ 1 GHz) |
|
Doppler
spread (per tap):
|
pure
Doppler, Rayleigh (classical Jakes) or Rice spectrum |
|
Dynamic
delay models:
|
constant
multipath, sinusoidal sliding delay, birth-death
process |
|
Calibration:
|
Attenuation
error, Phase error (correction through internal
tables) |
|
Local
oscillator:
|
Internal,
on RF board |
|
AWGN
noise source: |
Internal
|
|
| References |
| [1] |
“Base
Station (BS) Radio Transmission and Reception
(FDD), Release 6,” 3GPP TS 25.104 v 6.5.0,
3rd Generation Partnership Project, Technical
Specification Group Radio Access Network, March
2004. |
| [2] |
“Channel
Models for Fixed Wireless Applications,”
IEEE 802.16a -03/01, IEEE 802.16 Broadband Wireless
Access Working Group, June 2003. |
| [3]
|
“3GPP2
Multimedia Services Evaluation Methodology,”
TSG-C, C.P 1008-0 v 0.2.6, 3rd Generation Partnership
Project 2, August 2006. |
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