An Introduction to Quantum Communication by Vinod K. Mishra

Author:Vinod K. Mishra [Mishra, Vinod K.]
Language: eng
Format: azw3, pdf
Publisher: Momentum Press
Published: 2016-07-24T16:00:00+00:00

Figure 4.1. Sequence of coding action during quantum communication

4.1 NEED FOR CODING IN COMMUNICATION

Classical data communication process undergoes two kinds of coding as shown in Figure 4.1.

SOURCE CODING (CLASSICAL)

Source coding is also known as data compression and aims at removing redundancies in the data stream to prepare it for more efficient transmission. Zip data compression used on the Internet to make files smaller is a well-known example.

Suppose we have a data source with redundancy in which the individual bits are random and occur according to some probability distribution. Then Shannon’s Noiseless Source Coding Theorem states that there exists a reliable compression scheme with a rate R such that

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