I'm looking two papers https://ieeexplore.ieee.org/abstract/document/9370130 and https://ieeexplore.ieee.org/abstract/document/8855846.
In the first paper, achievable rate is
w_n is bandwidth. p_n is transmit power. h is channel gain.
And in second paper, achievable rate is
P is transmit power. H is channel gain.
What I curious is the difference between two same formula, the presence of bandwidth.
In first formula, there is bandwidth, however in second formula, there is no bandwidth in there(in the fraction part, denominator). What's the difference?