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	Gaussian minimum shift keying - Wikipedia, the free encyclopedia
		Gaussian minimum shift keying or GMSK is a kind of continuous phase frequency shift keying.
		The baseband signal is then modulated using frequency modulation, producing a complete GMSK signal.
		GMSK has high spectral efficiency, but it needs higher power level than for instance Quadrature phase-shift keying (QPSK) to reliably communicate the same amount of data.
	en.wikipedia.org /wiki/Gaussian_minimum_shift_keying (249 words)

	Privateline.Com: GSM/PCS by John Scourias with comments by Tom Farley: RC Levine's comments on GMSK
		GMSK was developed specifically for GSM by the COST (Council on Science and Technology, a scientific advisory group funded by CCITT and later ETSI).
		GMSK uses a special waveform to achieve a gradual change in frequency when the two consecutive binary bits to be transmitted are 01 or 10.
		The important thing about use of GMSK for GSM is that the power produced in an adjacent modulated carrier bandwidth (the 200 kHz section of spectrum next to the desired channel) is less than 1/2 percent of the desired signal power.
	www.privateline.com /PCS/GSM07supplement.html (1031 words)

	CommsDesign - Efficient GMSK Modulator Targets GSM Designs (Site not responding. Last check: 2007-10-08)
		In a traditional GMSK implementation, such as the one shown in Figure 1, bits to be transmitted are filtered through the Gaussian filter with impulse response g(t) and integrated to generate the instantaneous phase of the modulated signal.
		Under the proposed GMSK implementation, the I and Q components corresponding to the four possible phase paths in Figure 5 are stored in a look-up table in the memory.
		In the traditional implementation of the GMSK modulator, the accuracy of the modulated signal components depends upon the accuracy of various operations involved in generating those components.
	www.commsdesign.com /design_corner/OEG20020708S0008 (2421 words)

	ECEn 485: Gaussian Minimum Shift Keying
		In GMSK, this modulation method is modified by filtering the NRZ pulse train with a Gaussian low pass filter.
		In the applications where GMSK is used, the trade-off between between reduced bit error rate performance and bandwidth is well worth the cost.
		GMSK is the modulation used for the U.S. Digital Packet Data (CDPD) system and the GSM system.
	www.ee.byu.edu /ee/class/ee485/simulink/fsk-fm/fsk-fm.html (685 words)

	[Lf] PSK sidebands
		GMSK If you low-pass filter a data waveform, you soften the transitions.
		Both MSK and GMSK can be demodulated with a frequency discriminator, although better results are possible with phase-synchronous detectors.
		Some good information on GMSK is available in various application notes at the MX-Com website at http://www.mxcom.com/products.htm With a data filter consisting of a second-order filter such as a Sallen-Key, with a cutoff frequency of about 0.8 times the data rate, the bandwidth vs. data-quality compromise is even better.
	www.amrad.org /pipermail/lf/2000q4/000821.html (1097 words)

	Microwave Journal: A simple GMSK modulator for microwave and millimeter-wave frequencies.(Gaussian minimum shift ... (Site not responding. Last check: 2007-10-08)
		A simple hardware architecture for effective realization of Gaussian minimum-shift keying (GMSK) modulation at microwave and millimeter-wave frequencies is presented.
		The modulator is based on achieving continuous linear phase modulation of a carrier signal over the full 360 [degrees] range.
		Performance results for a prototype GMSK modulator implementation at 18 GHz are also presented.
	www.highbeam.com /library/doc0.asp?DOCID=1G1:54195211&refid=ip_encyclopedia_hf (168 words)

	High Speed Modem for Packet Radio
		GMSK Data Products is a partnership company set up by two professional electronic design engineers who are also keen radio amateurs, Matt, G6WPJ, and John, G8STW.
		GMSK modulation and demodulation and the modems' control and data coding are all performed in the latest integrated circuit devices.
		GMSK as a method of transmission is simple and effective.
	www.southgatearc.org /articles/highspeedpacket.htm (2082 words)

	External Wireless Modems & GPS (Site not responding. Last check: 2007-10-08)
		FFSK and GMSK Modem With GPS For PMR
		MP2087G – This is a 8000 baud GMSK modem with Rockwell or Serif G.P.S module and MPA27 interface.
		MP2028G – This is a 1200/2400 FFSK and 8000 bps GMSK modem with Rockwell or Serif G.P.S module.
	www.micrologic-design.com /prod01.htm (1733 words)

	Wireless Data Communication Using GMSK Technique
		The GMSK modem chip (CMX589AP4) module is built on the additional board on the bottom while the rest of the modules are similar with the transmitter...
		The waveform at the top is the output from the GMSK transmitter.
		The waveform at the bottom is the demodulated waveform detected at the GMSK receiver.
	www.ee.surrey.ac.uk /Personal/W.Chai/BSc_Project_More.htm (118 words)

	Wireless Data Communication Using GMSK Technique
		The project is using the Gaussian filtered Minimum Shift Keying (GMSK) modulation technique to set up a wireless data communication network.
		The design of this project is based on a GMSK modem chip (CMX589AP4).
		This chip is used to produce the GMSK signals for transmission.
	www.ee.surrey.ac.uk /Personal/W.Chai/BSc_Project.htm (157 words)

	CommsDesign - Dealing with the EDGE Evolution (Site not responding. Last check: 2007-10-08)
		Nine new coding schemes using both Gaussian minimum shift keying (GMSK) and 8PSK modulations and a link adaptation algorithm are introduced to automatically switch between coding schemes based on the radio environment.
		Unlike GMSK modulation, which has a constant envelope signal, 8PSK modulations use linear modulation techniques with amplitude varying signal.
		It is therefore important to closely match the average power for both the GMSK and 8PSK modulation.
	www.commsdesign.com /design_corner/OEG20020906S0045 (2464 words)

	GMSK Modem (MOD-96) - SpaceQuest, Ltd. - Products (Site not responding. Last check: 2007-10-08)
		Modem is contained on a single, multi-layered printed circuit board without enclosure.
		Employs a Gaussian Minimum Shift Keying (GMSK) modulation scheme.
		GMSK modulation performance is similar to that of a G3RUH modem used on board all of the UoSAT-class spacecraft and is identical to that used on the AMRAD Oscar 27 spacecraft.
	www.spacequest.com /mod96.asp (224 words)

	[No title]
		GMSK with Differential Phase Detection in the Satellite Mobile Channel.
		GMSK with Frequency-Selective Rayleigh Fading and Cochannel Interference.
		GMSK with Limiter Discriminator Detection in Satellite Mobile Channel.
	www.dei.unipd.it /ricerca/telecom/Pupo_Cell.html (513 words)

	[No title] (Site not responding. Last check: 2007-10-08)
		GMSK is a MSK where a Gaussian-shaped impulse response filter generates a signal with low side lobes and narrower main lobe than a rectangular pulse would have.
		As far as mobile terminals are concerned, two mobile classes are standardised: one that requires only GMSK transmission in the uplink and 8-PSK in the downlink, and one that requires 8-PSK in both links.
		The first class is a way of providing attractive downlink services with a low-complexity mobile station, since most services are expected to require higher bit rates in the downlink.
	home.arcor.de /karina.eberle/Work/edge.html (1550 words)

	GMSK vs. MSK Demo (Using the Communications Blockset) (Site not responding. Last check: 2007-10-08)
		This demo uses various Communications and DSP Blockset blocks to model GMSK and MSK modulation schemes.
		The demo illustrate the difference between the two modulation schemes.
		In order to more clearly view the Gaussian pulse shape, you must use instrumentation that enables you to view the phase of the signal, as in described in CPM Phase Tree Demo.
	www-rohan.sdsu.edu /doc/matlab/toolbox/commblks/usersguide/example4.html (236 words)

	GSM/PCS Resources and GMSK modulation (Site not responding. Last check: 2007-10-08)
		Analysed the performance of Gaussian Minimum Shift Keying (GMSK) modulation in a mobile radio environment.
		Bit error rate and block (packet) error rate performances were obtained analytically and verified with computer simulations.
		GMSK modulation is currently being used in the GSM standard.
	www.ece.ubc.ca /~williamm/research.html (225 words)

	Gaussian minimum shift keying - free-definition (Site not responding. Last check: 2007-10-08)
		Gaussian minimum shift keying or GMSK is a kind of continuous phase modulation.
		Currently the densest coding being used is 5-GMSK.
		GMSK is a spectrally -efficient modulation form, but it needs higher power level than say, quadrature shift keying (QSK) to reliably communicate the same amount of data.
	www.free-definition.com /GMSK.html (236 words)

	Jurusan Gizi Masyarakat dan Sumberdaya Keluarga (Site not responding. Last check: 2007-10-08)
		Situs ini dimaksudkan untuk menginformasikan perkembangan dan kemajuan yang dicapai Jurusan Gizi Masyarakar dan Sumberdaya Keluarga (GMSK), Fakultas Pertanian, Institut Pertanian Bogor.
		Profil singkat, tentang Sejarah GMSK; Visi, Misi, Tujuan; Kompetensi; Potensi; dan Struktur Organisasi di Jurusan GMSK.
		Kegiatan penelitian dan kerjasama jurusan GMSK dengan instansi terkait lain baik di luar atau di dalam IPB.
	www.ipb.ac.id /~gmsk-faperta (146 words)

	AIS - Automatic Identification System (Site not responding. Last check: 2007-10-08)
		The modulation type is GMSK (Gaussian Minimum Shift Keying) and the data speed is 9600 bps.
		It is not easy to distinguish the AIS transmissions from the background noise -- they sound the same and the data bursts are only 0.03 seconds.
		Most of the time was spent on the Internet, gathering information on GMSK, NRZI and bit stuffing.
	rl.se /polisradio/ais_eng.html (863 words)

	60 Wireless Communication
		Focus is made on one application, point to point transmission within a room.
		Two modulation schemes that could be used in a future demonstrator are compared: Gaussian Minimum Shift Keying with BT=0.5 (0.5 GMSK) and Differential Quadrature Phase Shift Keying coupled with Orthogonal Frequency Division Multiplexing (DQPSK/OFDM).
		We emphasis on the dependence of bit error rate and therefore achievable bit rate with respect to hardware parameters.
	arnaud.labouebe.free.fr /ericsson.htm (2733 words)

	ANADIGICS Product Details for Part: AWT6168 (Site not responding. Last check: 2007-10-08)
		The AWT6168 supports dual/tri/quad-band applications for GMSK and 8-PSK modulation schemes using a polar architecture.
		The module includes an internal reference voltage and integrated power control scheme for use in both GMSK and 8-PSK operation.
		This facilitates fast and easy production calibration and reduces the number of external components required to complete a power control function.
	www.anadigics.com /products/details.jsp?id=226 (175 words)

	Electronic Equipment - Constant Modulus Signals: GMSK Versus 3pi/8-shifted 8PSK (Site not responding. Last check: 2007-10-08)
		Electronic1 is a free, independent resource made available to you by a group of volunteer Electronic enthusists.
		Subject: Constant Modulus Signals: GMSK Versus 3pi/8-shifted 8PSK
		It has been stated that a GMSK transmit amplifier can be totally
	www.electronic1.net /detail-1288189.html (4689 words)

	RF Avenue - Digital Modulation Tutorial, Theory, & Tools -- FSK, PSK, BPSK, QPSK, Books, Book Reviews, ...
		Also covers a number of related issues such as intersymbol interference, pulse shaping, signal-to-noise ratio, and bit error rate.
		- Explores the logical path from the elementary BPSK modulation scheme, to QPSK, to OQPSK, to MSK, and finally to GMSK modulation.
		- A superb, comprehensive tutorial that covers most RF modulation types, including GMSK.
	www.newwaveinstruments.com /resources/rf_microwave_resources/sections/digital_modulation_tutorial_theory_technique.htm (1090 words)

	GMSK (Site not responding. Last check: 2007-10-08)
		Other topics in our resources on GSM related to GMSK include:
		Please contact us if you would like to nominate other entries to improve this glossary.
		Please also contact Argos Press to request information on licensing our content (such as this glossary entry on GMSK).
	gsm.argospress.com /abbrevG-gmsk.htm (77 words)

	The Wavelet Digest :: View topic - Question: Wavelets and PSK, GMSK, ....
		The Wavelet Digest :: View topic - Question: Wavelets and PSK, GMSK,....
		digital signalling, such as PSK, GMSK etc. Can you send me some
		This page was created in 0.193803 seconds : 18 queries executed : GZIP compression disabled
	www.wavelet.org /phpBB2/viewtopic.php?t=3435 (61 words)

	ElectronicsWeekly.com - GMSK modem with IF processing (Site not responding. Last check: 2007-10-08)
		CML Microcircuits has developed a single-chip GMSK packet-data modem with RF transceiver is the basis of a baseband modem with IF and RF processing functions, programmable synthesisers, signal level-setting functions and comprehensive on-chip and peripheral control, monitoring and interfacing....
		Offering a data range of 4 to 16kbit/s with selectable BT values, at RF frequencies of 400MHz to 1GHz, the CMX990 is formattable to both freeformat and packet data schemes, is fully Mobitex compatible and can be set to comply with EN 300 113 and FCC CFR 47 Part 90 standards.
		Click here for free automated emails, delivering daily or weekly news from EW.com.
	www.electronicsweekly.com /articles/article.asp?liArticleID=37502&liFlavourID=1 (196 words)

	Tech Reports: HPL-98-36: Noncoherent Equalization of GMSK
		Noncoherent Equalization of GMSK Using Complex Receiver Structures
		Abstract: In this letter, the performance of the HIPERLAN system (GMSK with BT=0.3) is considered, in the presence of indoor multipath fading channels.
		Due to the high carrier frequency and high data rate, a simple noncoherent demodulator followed by a nonlinear equalizer, which includes a RAM and a Viterbi decoder, is proposed to cope with intersymbol interference.
	www.hpl.hp.com /techreports/98/HPL-98-36.html (138 words)

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