DIGITAL COMMUNICATION
- 1. The codes developed during the four decades after hamming were definitely achieving practically Error-Free communication
- 2. The information sources most of in the nature are analog in nature
- 3. The communication channel has a finite Band Width
- 4. Geometric representation of signals, which greatly simplifies Signal Detection process
- 5. Channels such as under water acoustic channels are molded as Linear Time Variant Filter channels
- 6. Gaussian Distribution is used in the various fields of science and engineering
- 7. The conversion of analog form of signal to discrete form takes place in Quantiser
- 8. Crest Factor describes how strong the signal peak value is with respect to its RMS value
- 9. In Adaptive PCM the efficiency can be further improved by allowing the system to adapt to the slowly time varying stastics
- 10. Coding can’t generate additional information nor it destroy exisisting information
- 11. Huffman code was generated by American scientist D.A.Huffman in 1952
- 12. Huffman or Shannon-Fano codes which belongs to the class of Fixed to Variable Length Codes
- 13. Information capacity theorem is also referred as Hartley-Shannon Law
- 14. If the weights remain fixed during the transmission of the data the equalization is Preset
- 15. Power eefficency of a coherent detection is Optimum
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