'Original data sequence' diaporamas de présentation

Chapter 3 Digital Transmission Fundamentals

Chapter 3 Digital Transmission Fundamentals. 3.1 Digital Representation of Information 3.2 Why Digital Communications? 3.3 Digital Representation of Analog Signals 3.4 Characterization of Communication Channels 3.5 Fundamental Limits in Digital Transmission 3.6 Line Coding

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Chapter 8 Lossy Compression Algorithms

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OFDM (Orthogonal Frequency Division Multiplexing)

OFDM (Orthogonal Frequency Division Multiplexing). What is OFDM. Assume we need to send data at a speed of R symbols/sec. We break the data sequence into N (an integer, say, 48) sub-sequences. The data rate of each sub-sequence will be R/N, much slower than the original sequence.

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