Register to reply

Simple sinusoidal wave can't convey information?

by Mesmerized
Tags: convey, information, simple, sinusoidal, wave
Share this thread:
Mesmerized
#1
Nov30-12, 02:11 PM
P: 54
Hello,

Here http://www.mathpages.com/home/kmath210/kmath210.htm it is written that "...in order to actually convey information, a signal cannot be a simple periodic wave...". I've met this statement in several other places too, this one is just for reference.

What does that mean that a simple sinusoidal periodic wave can't convey information?
Phys.Org News Partner Physics news on Phys.org
UCI team is first to capture motion of single molecule in real time
And so they beat on, flagella against the cantilever
Tandem microwave destroys hazmat, disinfects
jtbell
#2
Nov30-12, 02:22 PM
Mentor
jtbell's Avatar
P: 11,864
How would you convey information with such a wave?
AlephZero
#3
Nov30-12, 02:59 PM
Engineering
Sci Advisor
HW Helper
Thanks
P: 7,284
A "simple sinusoidal periodic wave" in this sense continues for all time (both in the past and in the future) with the same amplitude and frequency.

That might be different from a "common sense" idea of what the word "simple" means.

Rap
#4
Nov30-12, 07:27 PM
P: 789
Simple sinusoidal wave can't convey information?

To convey information, you need at least two "words". One word gives no information - If your answer to every question was "yes", your answers would have no value at all, they would carry no information. A simple sine wave is like one word, it carries no information. If you had two possibilites, a sine wave or no sine wave, then you could transmit information, like "yes" or "no".
Mesmerized
#5
Dec1-12, 01:47 AM
P: 54
thanks for the answers.
thank you Rap, that explains it clearly


Register to reply

Related Discussions
Finding wavelength and wave speed in a sinusoidal wave. Introductory Physics Homework 7
Rms value of the half-wave rectified sinusoidal wave Introductory Physics Homework 11
A sinusoidal wave Introductory Physics Homework 2
A sinusoidal wave Introductory Physics Homework 0
Sinusoidal wave Introductory Physics Homework 2