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At some places it is written that Baud rate = 2 * Bit rate and some places its written that Bit rate = 2 * Baud rate? I am confused, what is the relation between the two ?
in Computer Networks 2.6k views

3 Answers

2 votes

Bit rate is a measure of the number of data bits (that's 0's and 1's) transmitted in one second. A figure of 2400 bits per second means 2400 zeros or ones can be transmitted in one second, hence the abbreviation 'bps'. Baud rate by definition means the number of times a signal in a communications channel changes state.It may in Manchester encoding and differential Manchester encoding baud rate= 2*bit rate.

Baud rate is mostly used in telecommunication and electronics, representing symbol per second or pulses per second, whereas bit rate is simply bit per second. To be simple, the major difference is that symbol may contain more than 1 bit, say n bits, which makes baud rate n times smaller than bit rate.

Suppose a situation where we need to represent a serial-communication signal, we will use 8-bit as one symbol to represent the info. If the symbol rate is 4800 baud, then that translates into an overall bit rate of 38400 bits/s. This could also be true for wireless communication area where you will need multiple bits for purpose of modulation to achieve broadband transmission, instead of simple baseline transmission.


Rohan Ghosh you say  "which makes baud rate n times smaller than bit rate." how it is possible i think reverse is true.plz check once am i right????

1 vote
baud rate is =2* bit rate . what baud rate means is noumber of voltage that u are using so . we use 2 voltage to send one it .

see if u remember the manchester or difrential manchester encoding . u can see that we are using and structure which is half up and half down . and it represent one bit . so we use 2 voltage ( 1 positive ,1 negative for 1 bit)

so 2 voltage =1 bit

baud rate = 2 * bit rate
0 votes
Answer is baud rate =bit rate / no of bits levels

and no of bits is calculated as = Log base(2) L, where L is voltage level,   

so Baud rate = 2 * Bit rate (For manchester Encoding) and Bit rate = 2 * Baud rate (4-PSK) both are correct...!!!! Due to change in L

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