Comment on "A General Theory for Intelligible Crosstalk Between Frequency-Division Multiplexed Angle-Modulated Carriers"

There are a few errors, a couple of poor suggestions, and several assumptions made without being stated in the above paper by Shimbo and Pontano for crosstalk computation. The method does not seem to work when the two carriers (for a two carrier case) are not at equal power levels. Also, better approximations of TWTA characteristics do not seem to produce more reliable results.