Talk:Angle modulation

PWM

Is Pulse-Width Modulation (PWM) a type of Angle Modulation? The frequency is constant, but the length of the pulse varies depending on input signal. This is essentially a digital (binary) system. It's in theory possible to combine it with Ampitude Modulation. Is this actually practiced? JWhiteheadcc 10:42, 4 November 2007 (UTC)

I'm not sure one could describe PWM as angle modulation, as the phase isn't being explicitly altered. Also, whilst the levels being used are discrete, PWM can represent a continuous variation, so could be described as analogue. Oli Filth^(talk) 11:23, 4 November 2007 (UTC)

PWM is a type of pulse modulation, distinguishable from both angle mod and AM JPatterson (talk)

Link?

What is wrong with this?

• [http://www.answers.com/topic/modulation Explanation of the the differences between

AM/FM/PM.] —Preceding unsigned comment added by JWhiteheadcc (talk • contribs) 02:40, 13 November 2007 (UTC)

This one is relevent since RF isn't the only application of Angular Modulation? It seems to describe the math behind it very well.

• FM and PM in musical instrument synthesis applications

JWhiteheadcc 02:45, 13 November 2007 (UTC)

The answers.com one is really just an automated web-crawl of everything related to the topic (including existing Wikipedia material), and not really the sort of thing we should be linking to.

The Stanford one is a little too heavily geared toward implementing it using SND, which I assume is some kind of audio programming language. The maths, ideally, should be covered in the indivdiual FM and PM articles. There's no need to link externally if internal links will do the trick! Oli Filth^(talk) 02:52, 13 November 2007 (UTC)

Thanks for fixing my links. I couldn't figure out why it seemed to be OK but didn't work. I forgot the "http://" at the beginning. JWhiteheadcc 04:38, 13 November 2007 (UTC)

Niche for angle modulation with respect to PM and FM

Anyone else see a potential niche problem since we have two good articles for FM and PM? Perhaps we could either have angle modulation redirect to PM, or use angle modulation to cover the common theoretical background for both PM and FM, allowing those two articles to focus on the practical aspects of their respective implementations? HatlessAtless (talk) 15:40, 29 April 2008 (UTC)

• FM modulates the carrier frequency and as a result has angle modulation characteristics as a side effect.  kgrr ^talk 14:54, 26 April 2016 (UTC)

Lead is incorrect

Angle modulation is a class of analog modulation.

This is incorrect. Angle modulation can be analog or digital, as is mentioned later down the article.JPatterson (talk) 23:10, 8 September 2011 (UTC)

Analog Angle Modulation

• PM -- PM changes phase but not carrier frequency

Digital Angle Modulation

• GMSK -- As used by GSM Type1