SFWRENG 4J03 Lecture Notes - Lecture 2: Gray Code, Units Of Information, Error Function

• School: McMaster University
• Department: Software Engineering
• Course: SFWRENG 4J03
• Professor: Rong Zheng

Document Summary

Message coordinates 2 e. g. 1) 2. Quadrature phase shift keeping (qpsk): another type of modulation. 4 symbols are transmitted with /2 phase difference between each. The qpsk signal is given as cos 2 t t. Message coordinates t d t t d t t t d t t d. S t i cos 2 i sin 2. Gray encoding: transmitting two sets of bits but only one bit quotient is different. Binary data polar nrt level encoder demux 1 (t) or 2 (t) qpsk signal si (t) Noise [n(t)]: x(t) = si (t) + n(t) x has two elements: x1 & x2. {0 t t, 1 = 14} x. 1 x t x t t t d t. 1 t t d cos 2 f t c i. T cos 2 f t c t d x. 4 sin 2 f t c n t. 4 sin 2 f t c cos 2 f t c n.