October 2018
Intermediate to advanced
555 pages
17h 33m
English
Content preview from Principles of Synchronous Digital Hierarchy
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Signal Impairments, Error
Detection, and Correction
The digital signal, when constructed, is in the form of well-dened pulses
per the chosen line coding or digital modulation scheme. However, before
this signal reaches the intended receiver, it undergoes a substantial amount
of abuses, which reduce its size and distort its shape. The received pulses
hardly look like pulses anymore. In fact, they look like two-dimensional
proles of “natural hillocks” when viewed on the oscilloscope. They have
highly distorted shapes and much smaller amplitudes as compared with the
original transmitted pulses. The transmitted and received pulses ...
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