Effective Noise Power Spectral Density

How to calculate the effective noise power spectral density,
when a noise factor of 3 if given and if said to make any assumptions.
What is an formaula for knowing the Noise Power Spectral Density is it N_o = kT_e

We know Effective Noise Temperature N = k.T_e.B
I'm assuming it as Te = 290 K x (10 ^NF/10 - 1) and what about 'B'?

B is bandwidth of the channel, in Hz.
Noise power spectral density is in dBm/Hz.
That's not right. Te is effective noise temperature.

In a link budget analysis the noise density is not factor of bandwidth.

http://www.space.gov.za/eee5024f/pre...principles.pdf