A group of alternative methods of characterizing a wideband communication channel, named after their proposer, P. Bello. The four functions characterizing deterministic channels are the Input Delay-spread Function, the Output Doppler spread function, the Time-variant Transfer Function and the Delay Doppler-spread function
" You want to be more expressive, diplomatic, and easy-going, but you feel the limitation in your communication with others and it creates frustration within you. The name Bello creates the desire for harmony with others, but we point out that it causes a blunt expression that alienates others. This name, when combined with the last name, can frustrate happiness, contentment, and success, as well as cause health weaknesses in the fluid systems, and tension or accidents to the head"