Error Detection and Correction Techniques

Error Detection and Correction Techniques.

Different Types Of Error Detection Techniques:

a.  Redundancy

b.  Echoplex

c.   Exact count encoding

d.  Parity

e.   Check sum

f.    Vertical Redundancy Check

g.  Horizontal Redundancy Check

h. Cyclic Redundancy Check

Circumstances of M-ary signaling schemes are preferred over binary Schemes:

Binary schemes transmit only one bit at a time. M-ary schemes transmit log2 M bit at a time. When available channel bandwidth is less, then M-ary schemes are used. M ary schemes require less bandwidth compared to binary schemes. For example binary PSK requires a bandwidth of 2fb. But M-ary PSK requires a bandwidth of 2fb.

The Advantages And Disadvantages Of Series Communication

Advantages:

Number of transmission lines is less Used for long distance communication Low cost

Disadvantages:

Speed is low