Gaussian Minimum Shift Keying (GMSK) - Revision history

Carlos.Lopez at 09:11, 25 November 2011

2011-11-25T09:11:38Z

← Older revision		Revision as of 09:11, 25 November 2011
Line 1:		Line 1:
	{{Article Infobox2		{{Article Infobox2
	\|Category=Fundamentals		\|Category=Fundamentals
	~~\|Title={{PAGENAME}}~~		\|Authors=J.A Ávila Rodríguez, University FAF Munich, Germany.
	\|Authors= J.A Ávila Rodríguez, University FAF Munich, Germany.
	\|Level=Advanced		\|Level=Advanced
	\|YearOfPublication=2011		\|YearOfPublication=2011
			\|Title={{PAGENAME}}
	}}		}}

	The Gaussian Minimum Shift Keying (GMSK) modulation is a modified version of the [[Minimum Shift Keying (MSK)]] modulation where the phase is further filtered through a Gaussian filter to smooth the transitions from one point to the next in the constellation. Next figure presents the GMSK generation scheme:		The Gaussian Minimum Shift Keying (GMSK) modulation is a modified version of the [[Minimum Shift Keying (MSK)]] modulation where the phase is further filtered through a Gaussian filter to smooth the transitions from one point to the next in the constellation. Next figure presents the GMSK generation scheme:

Line 22:		Line 21:
	==References==		==References==
	<references/>		<references/>


			== Credits ==
			The information presented in this NAVIPEDIA’s article is an extract of the PhD work performed by Dr. Jose Ángel Ávila Rodríguez in the FAF University of Munich as part of his Doctoral Thesis “On Generalized Signal Waveforms for Satellite Navigation” presented in June 2008, Munich (Germany)


	[[Category:Fundamentals]]		[[Category:Fundamentals]]
	[[Category:GNSS Signals]]		[[Category:GNSS Signals]]

Carlos.Lopez at 13:40, 31 October 2011

2011-10-31T13:40:23Z

← Older revision		Revision as of 13:40, 31 October 2011
Line 15:		Line 15:
	where the Gaussian filter adopts the following form in the time domain:		where the Gaussian filter adopts the following form in the time domain:

	::[[File:GMSK_Eq_1.png\|none\|~~420px~~]]		::[[File:GMSK_Eq_1.png\|none\|360px]]


	Where <math>\~~landa~~</math> is a normalization constant to maintain the power and the product <math>B T_c</math> is the -3 dB bandwidth-symbol time product. The higher this value, the cleaner will be the eye diagram of the signal but more power will be transmitted on the side lobes of the spectrum. A typical value in communication applications is <math>B T_c = 0.3</math> which is a good compromise between spectral efficiency and Inter-Symbol interference		Where <math>\lambda</math> is a normalization constant to maintain the power and the product <math>B T_c</math> is the -3 dB bandwidth-symbol time product. The higher this value, the cleaner will be the eye diagram of the signal but more power will be transmitted on the side lobes of the spectrum. A typical value in communication applications is <math>B T_c = 0.3</math> which is a good compromise between spectral efficiency and Inter-Symbol interference

	==References==		==References==

Carlos.Lopez: Created page with "{{Article Infobox2 |Category=Fundamentals |Title={{PAGENAME}} |Authors= J.A Ávila Rodríguez, University FAF Munich, Germany. |Level=Advanced |YearOfPublication=2011 }} The Gau..."

2011-10-31T13:39:03Z

Created page with "{{Article Infobox2 |Category=Fundamentals |Title={{PAGENAME}} |Authors= J.A Ávila Rodríguez, University FAF Munich, Germany. |Level=Advanced |YearOfPublication=2011 }} The Gau..."

New page

{{Article Infobox2
|Category=Fundamentals
|Title={{PAGENAME}}
|Authors= J.A Ávila Rodríguez, University FAF Munich, Germany.
|Level=Advanced
|YearOfPublication=2011
}}

The Gaussian Minimum Shift Keying (GMSK) modulation is a modified version of the [[Minimum Shift Keying (MSK)]] modulation where the phase is further filtered through a Gaussian filter to smooth the transitions from one point to the next in the constellation. Next figure presents the GMSK generation scheme:

::[[File:GMSK_Fig_1.png|none|thumb|580px|'''''Figure 1:''''' GMSK generation scheme.]]

where the Gaussian filter adopts the following form in the time domain:

::[[File:GMSK_Eq_1.png|none|420px]]

Where <math>\landa</math> is a normalization constant to maintain the power and the product <math>B T_c</math> is the -3 dB bandwidth-symbol time product. The higher this value, the cleaner will be the eye diagram of the signal but more power will be transmitted on the side lobes of the spectrum. A typical value in communication applications is <math>B T_c = 0.3</math> which is a good compromise between spectral efficiency and Inter-Symbol interference

==References==
<references/>

[[Category:Fundamentals]]
[[Category:GNSS Signals]]