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Non overlapping channels:


Channels that wont overlap for example, in 5.8 GHzc50 MHz spectrum available, 5825 to 5875, in 20 MHz channel bandwidth there are 2 non-overlapping channels are available.  5835MHz (5825 to 5845),  5855MHz(5845 to 5865). 3 non-overlapping channels in 2.4GHz(channels 1,6&11)

 India unlicensed band 2.4 - 2.4835GHz. 5.825-5.875GHz Power: Maximum transmitter output power of 1 Watt ( 4 Watts Effective Radiated Power) (30 dbm) in spread of 10 MHz or higher. 4 Watt peak or 36 dbm

EIRP: Equivalent/ Effective isotropic radiated power=36dbm/indoor 16dBm):

EIRP=Tx Power(dBm)+Antenna gain (dBi)-cable loss
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