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REPORT COPYRIGHT VIOLATION IN REPLY
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Message Subject
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Can anyone help me decipher what this "sign" says? I found this "Tomb" in the cemetary... It may have an important message for me!
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Poster Handle
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Anonymous Coward |
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Post Content
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Below is Picture #7 :QPSKmaybe: Picture #4
equation 2:
modern 'Heaviside' form of one of Maxwell's electromagnetic wave equations in a vacuum
Picture #7
Trigonometric polar coordinates unit circle
45 pi/4
135 3pi/4
225 5pi/4
315 7pi/4
'QPSK (Quadrature Phase Shift Keying)'
QPSK (Quadrature Phase Shift Keying) is a phase modulation algorithm.
Phase modulation is a frequency modulation version where the carrier wave’s phase is modulated to encode bits of digital information in each phase change.
The “PSK” in QPSK refers to the use of Phased Shift Keying. Phased Shift Keying is a form of phase modulation that is accomplished by using a discrete number of states. QPSK refers to PSK with 4 states. With half that number of states, there is a BPSK (Binary Phased Shift Keying). With twice the number of states as QPSK, there is a 8PSK.
The “Quad” in QPSK refers to four phases in which a carrier is sent in QPSK: 45, 135, 225, and 315 degrees.
QPSK Encoding
Because QPSK has 4 possible states, QPSK can encode two bits per symbol.
Quoting: dei sapientiam in mysterio Excellent contribution, yet I think there is more to this symbol. I wonder about the puzzling labeling of the axes? Doesn't seem to be intuitive, that is order of the alphabet, convention of the use of " ' ". By convention [ intuitively lower (neg.) to higher (pos.)]: X to X' Y' to Y C to A D to B Furthermore, angle X' A is labeled I angle X B is labeled II angle C X is labeled III angle D X' is labeled IV 4 events [I - IV] "General relativity describes gravitation as a curvature of spacetime..." see: [ link to www.lightandmatter.com] "...Over the course of the next two weeks, Dr. Jackson puzzles over the mysterious seven symbols in the center of the cartouche. Due to a chance incident, he discovers that these seven symbols are not words to be translated, but star constellations. When explaining his findings to General West, he states that the cartouche charts a course to a point in deep space with seven symbols—six for the destination and one for the point of origin..."
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