IEEE Interference Environment

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Presentation transcript:

IEEE 802.20 Interference Environment Informative addendum to contribution C802.20-04-64 Dan Gal Berlin, September 14, 2004

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 802.20 Contribution # C802.20-04-64addendum 2

ACLR, Selectivity and Blocking F4 F5 F1 – Wanted Channel F2 F3 -70dBm F1 – Wanted Channel F2, F3 – Adjacent Channels F4, F5 – Blocking Channels -70dBm -90dBm IEEE 802.20 Contribution # C802.20-04-64addendum 3

OB, Channel Spacing and Guard-bands F1 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 802.20 Contribution # C802.20-04-64addendum 4