1. IEEE 802.20 Interference Environment
Informative addendum to contribution C
Dan Gal
Berlin, September 14, 2004

2. Interference Environment
The signal at the input of the receiver consists of signals received from:
The wanted transmitter at the wanted channel
Transmitters operating in the same channel (co-channel signals)
Leakage power from adjacent channels (generated by the co-tower/antenna transmitters and other nearby towers)
Transmitters operating in second-adjacent channels (generating blocking signals)
Other external RF interference sources
Non-linear and spurious transmission products
IEEE Contribution # C addendum 2

3. ACLR, Selectivity and BlockingF4 F5
F1 – Wanted Channel F2 F3
-70dBm
F1 – Wanted Channel F2, F3 – Adjacent Channels F4, F5 – Blocking Channels
-70dBm
-90dBm
IEEE Contribution # C addendum 3

4. OB, Channel Spacing and Guard-bandsF1 F2 F3
No guard bands
Ch Spacing
block-edge guard band OB OB
Ch Spacing OB
Ch Spacing OB
Ch Spacing
inter-channel guard band
IEEE Contribution # C addendum 4