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Design MAN WLAN Onno W. Purbo
Understanding.. WLAN Bandwidth Channels Propagation Designing the MAN Inserting Point to Point (P2P) Links
Additional Channels in Some non-US equipments MHz MHz
Single Channel Spectrum
Orthogonal Channel Set Channels set that provide enough frequency separation to co-locate three RF links without interfering with each other.
From Waverider Measurement
Orthogonal Channel Allocation
3 Orthogonal Channel Sets 3 orthogonal channels GHzch GHzch GHzch. 11 Better separation
4 Orthogonal Channel Sets 4 orthogonal channels GHzch GHzch GHzch GHzch. 13 Better for dense areas Not enough separation Using non-US equipments
Attenuation: Propagation & Range
MAN Design Based on 3 Orthogonal Channel Set
Omni at BTS
Using Sectoral Antenna Better Design & Density
120 deg Sectoral Antenna
3 BTS MAN 120-deg Sectoral
MAN Design Based on 4 Orthogonal Channel
90 deg Sectoral Antenna
4 Channel MAN Design
Insertion P2P Links Base Transmitter Stations use Omni or Sectoral antenna. It is vertical polarization. Use Horizontal Polarization for P2P link for adding 3dB separation.
P2P Channels GHz- ch GHz- ch. 8 P2MP Channels GHz- ch GHz- ch GHz- ch. 11
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