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Chapter: Analog and Digital Communication

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

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

 

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Analog and Digital Communication : Error Detection and Correction Techniques |


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