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Topic: Baseband modulation

	Single-sideband modulation - Wikipedia, the free encyclopedia
		Single-sideband modulation (SSB) is a refinement of the technique of amplitude modulation designed to be more efficient in its use of electrical power and bandwidth.
		Standard amplitude modulation produces a modulated output signal that has twice the bandwidth of the baseband signal.
		Modulation using this method is again gaining popularity in the homebrew and DSP fields.
	en.wikipedia.org /wiki/Single-sideband_modulation (1271 words)

	Gaussian minimum shift keying - Wikipedia, the free encyclopedia
		The baseband modulation is generated by starting with a bitstream 0/1 and a bit-clock giving a timeslice for each bit.
		The baseband signal is generated by first transforming the zero/one encoded bits into -1/+1 encoded bits.
		The baseband signal is then modulated using frequency modulation, producing a complete GMSK signal.
	en.wikipedia.org /wiki/Gaussian_minimum_shift_keying (325 words)

	GLOSSARY - Baseband ...
		The Baseband signal is the band of frequencies representing the original signal either prior to modulation or reconstructed (demodulated) from the modulated signal.
		Modulation is a method of modifying a parameter of the carrier as a function of the baseband signal.
		The modified parameter is the amplitude for amplitude modulation, frequency for frequency modulation and phase for phase modulation.
	www.magma.ca /~masonjl/Glossary/glos3tr8.htm (207 words)

	Ultrawide-band communication system and method - Patent 5677927
		Modulation of the coded timing signal by the subcarrier time modulator generates a modulated, coded timing signal that is sent to an output stage.
		The effect of using the cross correlation function for the modulation transfer function is to cause the output of the receiver to be a non-linear function of the amplitude of the input.
		Modulation of the coded timing signal 1014 by the subcarrier time modulator 1016 generates a modulated, coded timing signal 1026 that is sent to an output stage 1028.
	www.freepatentsonline.com /5677927.html (15938 words)

	4
		While baseband modulation has a lowpass characteristic, beginning at or near zero (depending on the exact line code, see also 4.1.1), passband modulation has a bandpass characteristic with the used band situated somewhere in the frequency domain as can also be seen in figure 32.
		In general terms passband modulation is convenient in environments with a domination of low frequency noise, while baseband modulation is to be preferred in environments with a domination of high frequency noise [37].
		Multicarrier modulation for transmission of digital data is already known for almost 40 years, but until very recently never played a major role in practical implementations, mainly due to its originally considerably higher complexity in comparison with baseband and single carrier modulation schemes [19], [45].
	www.fh-luh.de /~wayne1/chapter4.html (16753 words)

	Diversity radio receiver - Patent 5448602
		Alternatively, offset transmission diversity for modulating carrier frequencies having a predetermined difference from two or more transmission base stations with the same baseband signal, simultaneously transmitting the modulated signals, and causing one antenna at the reception unit to receive the modulated signals.
		when a signal of a modulated signal of binary differential coding is to be delayed and detected, the output from equation (45) or (46) is used in accordance with the necessary detection direction, thereby obtaining diversity-processed demodulated output of the received signal.
		When a modulated signal of multivalue differential coding is to be delayed and differentially detected, both outputs from equations (45) and (46) are used to obtain a diversity output.
	www.freepatentsonline.com /5448602.html (4883 words)

	U.S. Patent: 5140613 - Baseband modulation system with improved ROM-based digital filter - August 18, 1992
		In the illustrated application of the invention to a.pi./4 DQPSK modulator, the decomposition of the desired output signal into component terms is effected by exploitation of symmetries inherent in the modulation.
		4A and 4B are block diagrams of a.pi./4 DQPSK modulator according to the illustrated embodiment of the present invention.
		The illustrated.pi./4 DQPSK modulation format uses a Nyquist type of bandpass filter to smooth the phase transition from state to state.
	www.everypatent.com /comp/pat5140613.html (4770 words)

	Easy Fourier Analysis
		The frequency domain representation of a Product Modulator or a mixer has a curious quality that instead of producing the products of the input frequencies which is what we really want, it produces sums and differences of the frequencies of the two input signals in both the positive and negative frequency domains.
		Modulation index larger that 100% distorts the signal so an envelope detector can not be used to demodulate it any longer.
		Use of SSB modulation would cut this in half but SSB is not used for video signals because of the complexity of the SSB receivers.
	www.complextoreal.com /base.htm (3857 words)

	ECEn 444: M-ary Baseband Modulation
		This exercise builds on the already familiar baseband modulation by generalizing to the case of M = 8 symbols.
		Modulation is straightforward as well as most of the detection process.
		Connect the output of your modulator s[n] to the input r[n] of your detector.
	www.ee.byu.edu /class/ee444/simulink/bb8/bb8.html (515 words)

	Representing Analog Signals (Communications Toolbox)
		To perform baseband modulation of an analog signal using this toolbox, start with a real message signal and a sampling rate
		Baseband modulation (using a technique other than QAM) produces a complex vector.
		The case for quadrature amplitude modulation (QAM) is similar, except that the message signal has in-phase and quadrature components.
	www.weizmann.ac.il /matlab/toolbox/comm/tutor24.html (427 words)

	Direct digital synthesis of precise, stable angle modulated RF signal (US5952895)
		The present invention, generally speaking, provides an RF modulator that allows precise, stable phase shifts to be obtained.
		The modulator uses a PLL structure including an auxiliary feedforward path used to inject a baseband modulation signal into the PLL at a point past a loop filter of the PLL.
		A resulting error signal is used to control injection of the baseband modulation signal into the PLL, to automatically achieve the correct "dosage." A precise, adaptive, phase-stable modulator results.
	www.delphion.com /details?pn=US05952895__ (335 words)

	Agilent/HP 8780A Vector Signal Generator (Site not responding. Last check: 2007-09-20)
		The HP 8780A vector signal generator is a synthesized IF source with exceptional modulation for modern receiver and component testing.
		It is capable of modulation bandwidths almost 100 times wider than previous HP synthesizers and has a built-in digital baseband to simplify generation of common digital modulations.
		Its extra-wide modulation bandwidth comes from a vector modulator that effectively doubles baseband modulation bandwidths for 700 MHz of output modulation.
	www.computereq.com /details.asp?item_id=hp-8780a (205 words)

	Crest factor analysis for complex signal processing
		A typical baseband signal processing scheme for IQ modulation of an RF carrier is shown in Figure 1.
		The crest factor of the baseband signals has been examined, so it is necessary to discuss the crest factor of the modulated RF signal.
		The RF signal is modulated by using an IQ modulator, where the baseband signals are applied to the I and Q inputs.
	rfdesign.com /mag/radio_crest_factor_analysis/index.html (3195 words)

	Block Reference (Communications Blockset)
		The first column shows the sublibraries for baseband simulation; the second column shows the sublibraries for passband simulation.
		Modulate using the differential quaternary phase shift keying method
		Modulate using the pulse amplitude modulation phase shift keying method
	www-rohan.sdsu.edu /doc/matlab/toolbox/commblks/ref/simref-7.html (561 words)

	Sklar - Digital Communications 2nd (Site not responding. Last check: 2007-09-20)
		Techniques developed in the context of a unified structure—The structure, in block diagram form, appears at the beginning of each chapter; blocks in the diagram are emphasized, when appropriate, to correspond to the subject of that chapter.
		Gives students insight into the state-of-the-art technique that allows “squeezing out the last drop” of performance improvement that is theoretically possible by using advanced error- correction techniques.
		Trellis-coded modulation and Reed-Solomon error-correction codes—Goes beyond simple mathematical description to explain all of the sophisticated math—with analogies of what that math is accomplishing.
	www.scitechpub.com /Sklar.htm (633 words)

	amodce (Communications Toolbox)
		is a scalar that represents the frequency deviation constant of the modulation.
		is a scalar that represents the phase deviation constant of the modulation.
		This example is similar to the one under the heading Hilbert Filter Example on the
	www.technion.ac.il /guides/matlab/toolbox/comm/amodce.html (346 words)

	TS 3230 : Telecommunication System and Technology (Site not responding. Last check: 2007-09-20)
		In general, the modulating signal such as voice or music is a complex waveform consist of bands of frequency, thus the modulated AM wave consists of two sidebands of frequency.
		Demodulation or Detection of AM is the process of recovering the original modulating (information) signal from the AM modulated wave.
		Since the modulating signal is basically contained as the envelope of a full-AM signal, rectifying the signal and detecting the peaks (i.e.
	www.s-t.au.ac.th /~supoet/3230wk4.htm (338 words)

	Digital Communications: Fundamentals and Applications, 2nd Edition - $87.55 (Site not responding. Last check: 2007-09-20)
		Next, he presents practical coverage of virtually every contemporary modulation, coding, and signal processing technique, with numeric examples and step-by-step implementation guidance.
		Signal transformations are organized according to nine functional classes: Formatting and source coding, Baseband signaling, Bandpass signaling, Equalization, Channel coding, Muliplexing and multiple access, Spreading, Encryption, and Synchronization.
		Chapter 3 emphasizes baseband signaling, the detection of signals in Gaussian noise, and receiver optimization.
	www.phptr.com /title/0130847887 (2587 words)

	Belar FMMA-1 "The Wizard" FM Modulation Monitor/Analyzer
		The Wizard is a microprocessor controlled, digital baseband FM modulation monitor/analyzer that precisely measures peak modulation, peaks per minute, average peak modulation, modulation density, and more.
		The Wizard can operate with an existing modulation monitor, or it can be configured to replace an existing baseband modulation monitor.
		You now have the ability to raise or lower the modulation going into the clipper, and to raise or lower the modulation coming out of the clipper - remotely, if desired.
	www.belar.com /FM/fmma1.htm (394 words)

	Communication Systems: Analysis and Design - $108.80 (Site not responding. Last check: 2007-09-20)
		KEY TOPICS: Chapter topics cover digital baseband modulation techniques, baseband receiver design, digital bandpass modulation and demodulation techniques, multiplexing techniques, analog-to-digital conversion, basics of information theory and data compression, and basics of error control coding.
		Baseband Modulation Using Rectangular Pulses and Binary PAM.
		Baseband Receiver Design (and Stochastic Mathematics, Part I).
	www.informit.com /title/0130402680 (301 words)

	:: Germany ::: (Site not responding. Last check: 2007-09-20)
		The Fraunhofer IIS Baseband System is one of the key componentsdata services.
		Input1.0Vp-p for 10% modulation of main carrierreferenced to 100% modulation): To reduce spectrumstereo composite baseband above 57kHz to -757.5-10%.
		SB-ZePoCwith Separated Baseband and for the firstanalytic phase modulation.
	www.mmcinfo.co.uk /6969/baseband-modulation.html (253 words)

	ECEn 485: Binary Baseband Modulation Simulink Exercise
		In this exercise, you will investigate the binary baseband system discussed in class.
		You will construct a block diagram representation of binary baseband modulation using the Communications Library in Simulink.
		You will construct a binary baseband system in the second part.
	www.ee.byu.edu /class/ee485/simulink/bb/baseband.html (160 words)

	[No title]
		Most information today is in bits Digital baseband modulation uses simple techniques to encode bits into baseband analog signal.
		Digital passband modulation encodes binary bits into the amplitude, phase, or frequency of the carrier.
		Decision device in receiver uses threshold to determine which bit was sent.
	www.stanford.edu /class/ee104/lecture23.ppt (170 words)

	resume
		Measurement of RF modulated signals using LSNA trigger-in and trigger-out
		- Correlating baseband signals (IandQ) with RF signal using trigger-in to LSNA
		“Large Signal Network Analyzer with Trigger for Baseband and RF System characterization with Application to K-Modeling and Output Baseband Modulation Linearization,” ARFTG 64 Conference Digest, Orlando, Dec. 2004(paper, talk).
	www.ece.osu.edu /~myoungs/resume.htm (441 words)

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