What are the units used in Shannon formula calculation?
Shannon formula:
$$
C = W log_2\bigg(1+\frac{P}{N_0 W}\bigg)
$$
P is the signal power, NoW is the power of the assumed white noise, W is the channel bandwidth and the result C is the theoretical ultimate limit information rate as bits/second which can be got with as low error rate as wanted by using more complex coding. The formula is existence theorem which gives no hint what coding will give a certain wanted error rate. It also doesn't deny faster communication if some error rate &gt;0 is accepted.
If you insert to P the received power and assume there's no other noise than the white noise power NoW in receiver's input you will get the theoretical maximum error free communication bitrate. It can be much higher than what's achievable with a practical system which doesn't use a complex coding and operates in an environment where usual NoW gives far too low noise or the noise is statistically something else than stationary non-self-correlating normal distribution white noise purely added (not multiplied) to the signal.
P and NoW must be calculated in the same units, say in watts and W must be in hertzes. Then C is bits/second or actually 1/second. It tells how many per second. We have a habit to say bits per second. Saying bits is the same common habit as using angle measurement unit radian which is actually a dimensionless number.
We have no idea of your path attenuation calculations. Numbers tell nothing of their meanings. H^2 vaguely hints you have taken a part of complex &quot;optimal  power distribution multichannel system&quot; capacity formula. H^2 is a plain number there. Augment your question to show the primary variables of the received power calculation if you expect something to be said about it.