(i)Bit rate :-
Bit rate is simply the number of bits transmitted during one second and is expressed in bits per second (bps). Mathematically bit rate is given by:-
Rb =1 / Tb
where Tb is time interval of one bit
(ii)Baud rate: -
Baud is the unit of symbol rate. Baud rate is the number of symbols transmitted during one second and is expressed in symbols per second or baud.
Mathematically, baud rate is the reciprocal of the time of one output signaling element and a Signaling element (symbol) may represent several information bits. Baud rate is expressed as,
Rs= 1 / Ts
Where, baud rate = symbol rate (symbols per second) and Ts = time interval of one symbol.