What kind of wacky unit is the spectral efficiency of bits/sec/Hz? Isn't that the same as 'bits'?<p>I mean, I'm guessing it's just saying the bit rate depends on the signal frequency, but it's still funny to see canceling units.<p>Related: a "spacing" measured in GHz.<p>Again, it makes sense, but it struck me that someone could write a total spoof paper with nonsense units and I wouldn't be able to tell the difference!