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6.1.4
Aggregate Ethernet throughput rate v maximum link loss
The equipment capability is given in Table 5. It gives the Ethernet throughput rate vs link loss
for Canopy 150/300 Mb BH in all modes. Adaptive modulation will ensure that the highest
throughput that can be achieved instantaneously will be obtained taking account of
propagation and interference. The calculation of
whether a particular link can be installed. When the link has been installed web pages provide
information about the link loss currently measured by the equipment both instantaneously and
averaged. The averaged value will require maximum seasonal fading to be added and then
the radio reliability of the link can be computed.
Modulation Mode
/ Payload Type
256QAM 0.81 dual
64QAM 0.92 dual
64QAM 0.75 dual
16QAM 0.87 dual
16QAM 0.63 dual
16QAM 0.63 single
QPSK 0.87 single
QPSK 0.63 single
BPSK 0.63 single
256QAM 0.81
64QAM 0.92 single
64QAM 0.75 single
16QAM 0.87 single
Table 5: 300 Mb BH - Aggregate Ethernet throughput rate v maximum link loss
Divide the above Aggregate Ethernet rates in half to compute 150 Mb BH rates.
The full calculation is relatively complicated and thus Motorola have supplied a link estimator
that calculates the radio propagation and reliability of NLoS links using the Canopy 150/300
Mbps Backhaul equipment.
A more detailed discussion on data rates can be found in Section 17.
3
Aggregate data rate in 40:40 mode for a 1km link length
Issue 1.1 April 2006
Maximum
Threshold
Aggregate
Value
3
Data Rate
(dBm)
(Mbit/s)
300.2
-59.1
252.9
-62.0
206.7
-68.1
160.8
-71.0
115.6
-75.2
57.8
-79.3
40.2
-81.6
28.9
-84.6
14.4
-88.1
150.1
-64.0
126.4
-65.9
103.3
-71.7
80.4
-74.8
q uation needs to be performed to judge
E
Output
Power
(dBm)
+18
+18
+18
+20
+22
+22
+23
+24
+25
+18
+18
+18
+20
Maximum Link
Loss
(dB)
124.1
127.0
133.1
138.0
144.2
148.3
151.6
155.6
160.1
129.0
130.9
136.7
141.8
Page 35
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