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	Single-sideband modulation - Wikipedia, the free encyclopedia
		To produce an SSB signal, a filter removes one of the sidebands.
		To recover the original signal from the IF SSB signal, the single sideband must be frequency-shifted down to its original range of baseband frequencies, by using a product detector which mixes it with the output of a beat frequency oscillator (BFO).
		A vestigial sideband (in radio communication) is a sideband that has been only partly cut off or suppressed.
	en.wikipedia.org /wiki/Single_sideband (1110 words)

	Sideband - Wikipedia, the free encyclopedia
		In radio communications, a sideband is a band of frequencies higher than or lower than the carrier frequency, containing energy as a result of the modulation process.
		Transmission in which only one sideband is transmitted is called single-sideband transmission (SSB, particularly USB and sometimes LSB), used mainly in amateur radio.
		Sidebands are also what cause interference to adjacent channels, and therefore they must be suppressed by filters, either before or after modulation (or often both).
	en.wikipedia.org /wiki/Sideband (307 words)

	sideband (Site not responding. Last check: 2007-11-06)
		Amplitude modulation of a carrier wave normally results in two sidebands.
		If part of one sideband and all of the other remain, it is called vestigial sideband, used mostly with television broadcasting, which would otherwise take up an unacceptable amount of bandwidth.
		In many cases, paticularly in SSB amateur radio, a suppressed carrier is used, significantly reducing the amount of electrical power used (by up to 12 times), while still leaving the audio or other information present in the sideband.
	www.yourencyclopedia.net /sideband.html (335 words)

	Apparatus for incorporating digital signals with a standard TV signal - Patent 5029003
		Normally this signal is generated by double sideband modulating an RF picture carrier with a baseband composite video signal and thereafter vestigial filtering the modulated signal to remove the majority of the lower sideband.
		Signal from the mixer 62 is coupled to a vestigial sideband filter 64, the output of which is indicated in the upper sideband of the spectrum illustrated in FIG.
		Preferably the rolloff of the vestigial sideband filter will have a linear characteristic or at least symmetric skirts so as not to introduce distortion in the auxiliary signal, e.g., where the auxiliary signal is in duo-binary format.
	www.freepatentsonline.com /5029003.html (3553 words)

	Carrier recovery system for a vestigial sideband signal - Patent 5894334 (Site not responding. Last check: 2007-11-06)
		Since the pilot represents the DC component of the VSB signal, and this DC component is in the middle of the vestigial sideband, the tone appears to be situated in the middle of modulation "noise" caused by the data itself.
		The output of delay unit 72 is a complex near baseband symmetrical double sideband VSB signal as depicted by the frequency spectrum diagram adjacent to block 72.
		This signal is shifted to closer to baseband by multiplier 74, which is clocked at 1/8 f.sub.sr to produce a near baseband upper VSB sideband at its output, as depicted by the frequency spectra diagram at the output of multiplier 74.
	www.freepatentsonline.com:9003 /5894334.html (5276 words)

	Modulation (Site not responding. Last check: 2007-11-06)
		It is also possible to transmit a SINGLE sideband for a slight sacrifice in low frequency response (it is difficult to suppress the carrier and the unwanted sideband, without some low frequency filtering as well).
		Vestigial Sideband modulation is a lot like Single Sideband, except that the carrier frequency is preserved and one of the sidebands is eliminated through filtering.
		Vestigial Sideband transmission is usually found in television broadcasting.
	telecom.tbi.net /mod1.html (797 words)

	Vestigial sideband modulation (Site not responding. Last check: 2007-11-06)
		Amplitude modulation typically produces a modulated output signal that hastwice the bandwidth of the modulating signal, with a significant power componentat the center carrier frequency.
		The front end of an SSB receiver is the same as that of an AM or FM receiver, consisting of a superheterodyne RF front end thatproduces a frequency-shifted version of the radio frequency (RF) signal within a standard intermediate frequency (IF) band.
		To recover the original signal from the IF SSB signal, the single sideband must be frequency-shifted down to its originalrange of baseband frequencies, by using a product detector which mixes it with the output from a beat frequency oscillator (BFO).
	www.therfcc.org /vestigial-sideband-modulation-190793.html (539 words)

	Digital quadrature amplitude and vestigial sideband modulation decoding method and apparatus - Patent 5477199
		A synchronous detector for demodulating and decoding a digital data signal modulated either according to a vestigial sideband or a quadrature amplitude modulation scheme is based upon the principle of recognizing that a vestigial sideband signal may be regarded and treated as an offset-keyed QAM signal.
		A related modulator for modulating a digital data signal either according to a vestigial sideband or quadrature amplitude modulation scheme comprises a switch for selectively switching an input digital data signal between real and imaginary arms and a modulator for modulating at center frequency.
		Modulator 10 produces vestigial sideband modulated signals when the weights applied to the real and imaginary arms 16 and 18 are appropriately determined as described more fully in my copending application.
	www.freepatentsonline.com /5477199.html (5133 words)

	Independent sideband (Site not responding. Last check: 2007-11-06)
		Independent sideband (ISB) is an AM single sideband mode which is used with some AM radio transmissions.
		Normally each sideband carries identical information, but ISB modulates two different input signals — one on the upper sideband, the other on the lower sideband.
		ISB is a type of hybrid between double sideband (DSB) and single sideband (SSB) — the other is vestigial sideband (VSB).
	en.mcfly.org /Independent_sideband (120 words)

	SurfWax: News, Reviews and Articles On Sideband
		The High Frequency single sideband communications division is engaged in the design, manufacture and sale of High Frequency (HF) systems utilized for long- range voice and data communications in fixed station, mobile and marine strategic applications.
		Zenith developed vestigial sideband transmission system that was adopted as the digital television...
		No sideband signals are used as clock and framing is embedded in the data.
	news.surfwax.com /telecom/files/Sideband.html (1346 words)

	vestigial sideband - a Whatis.com definition (Site not responding. Last check: 2007-11-06)
		Vestigial sideband (VSB) is a type of amplitude modulation (AM) technique (sometimes called VSB-AM) that encodes data by varying the amplitude of a single carrier frequency.
		Portions of one of the redundant sidebands are removed to form a vestigial sideband signal - so-called because a vestige of the sideband remains.
		The actual information is transmitted in the sidebands, rather than the carrier; both sidebands carry the same information.
	whatis.techtarget.com /definition/0,,sid9_gci332235,00.html (267 words)

	Independent sideband (Site not responding. Last check: 2007-11-06)
		Independent sideband (ISB) is an AM single sideband mode which is used with AM radio transmission.
		Normally each sideband carries identical information but ISB modulates two different input signals -- one the upper sideband the other on the lower sideband.
		ISB is a type of hybrid between double sideband (DSB) and single sideband (SSB) the other is vestigial sideband (VSB).
	www.freeglossary.com /ISB (452 words)

	US PATENT SUBCLASS 455 / 47-- .~ Single or vestigial sideband system (Site not responding. Last check: 2007-11-06)
		(under subclass 39) Subject matter where one sideband of the transmitted signal is largely or entirely suppressed while the second sideband has little or no suppression.
		In this class, the term asymmetric sideband is generic to single and vestigial sideband.
		170+, for a single or vestigial sideband type amplitude modulator, per se.
	www.patentec.com /data/class/defs/455/47.html (88 words)

	Special vestigial sideband signal for use in communication systems - Patent 4660222 (Site not responding. Last check: 2007-11-06)
		The DSB signal has an amplitude envelope proportional to the magnitude of the modulating waveform, whereas the amplitude of the SSB signal envelope is in general greater than that of the modulation.
		Although vestigial sideband transmission has been employed for many years in U.S. television broadcasting to send the visual information, the SVSB signal described herein is tailored to the needs of AM-based transmission and reception systems requiring a very high degree of accuracy in the demodulated signals, such as found in high-fidelity audio broadcasts.
		The half-bandwidth vestigial sideband in each spectral plot is placed to permit guard bands at critical spots in the basebands of the TV and FM systems to enhance system performance and reduce crosstalk between the adjacent subcarrier channels.
	www.freepatentsonline.com /4660222.html (3003 words)

	Vestigial Sideband Modulation Encyclopedia Article, Definition, History, Biography (Site not responding. Last check: 2007-11-06)
		Looking For vestigial sideband modulation - Find vestigial sideband modulation and more at Lycos Search.
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	www.stardustmemories.com /encyclopedia/Vestigial_sideband_modulation (1326 words)

	sideband on Encyclopedia.com (Site not responding. Last check: 2007-11-06)
		Those frequency components that are higher than the carrier frequency are know as upper sidebands; those lower are called lower sidebands.
		The upper and lower sidebands contain equivalent information; thus only one needs to be transmitted.
		Such single-sideband signals are very efficient in their use of the frequency spectrum when compared to standard amplitude modulation (AM) signals.
	www.encyclopedia.com /html/s1/sideband.asp (272 words)

	Agile Channel (Site not responding. Last check: 2007-11-06)
		The R.L. Drake VM2050 is a high quality, vestigial sideband agile modulator with synthesized visual and audio carriers...
		The VMM860AP is an agile, premium, vestigial sideband, heterodyne audio/video modulator with synthesized visual and aural carriers.
		The VMM860AG is an agile, high quality, vestigial sideband, heterodyne audio/video modulator with synthesized visual and aural carriers.
	www.com-tech-services.com /cat16_1.htm (133 words)

	BROADCASTPAPERS.COM (Site not responding. Last check: 2007-11-06)
		By virtue of the Nyquist Theorem, it is possible to transmit 10.76 Million symbols/sec in a vestigial sideband signal (VSB)6 with a minimum frequency bandwidth of ½ * 10.76 MHz = 5.38 MHz.
		Since the allotted channel bandwidth is 6 MHz, it is possible to relax the steepness of the VSB filter skirts slightly and still fall within the 6 MHz channel.
		This virtual elimination of the lower sideband, along with the narrowband filtering of the upper sideband, creates very significant changes in the RF waveform that is ultimately transmitted.
	www.broadcastpapers.com /tvtran/Harris8VSB07.htm (728 words)

	Single-sideband Modulation Encyclopedia Article, Definition, History, Biography (Site not responding. Last check: 2007-11-06)
		Looking For single sideband modulation - Find single sideband modulation and more at Lycos Search.
		Find single sideband modulation - Your relevant result is a click away!
		Look for single sideband modulation - Find single sideband modulation at one of the best sites the Internet has to offer!
	www.greatartworks.com /encyclopedia/Single-sideband_modulation (1293 words)

	Encyclopedia: ISB
		independent sideband - A radio modulation mode used in some AM radio transmissions.
		Institute for Systems Biology - a non-profit research institute dedicated to the study and application of systems biology.
		Abbreviations The iconic cover of the bands 2nd album designed by The Fool The Incredible String Band were (and are) a Scottish acoustic band in the 1960s who built a popular following among the British counter culture, and are considered psych folk music pioneers.
	www.nationmaster.com /encyclopedia/ISB (456 words)

	Vestigial sideband modulation (Site not responding. Last check: 2007-11-06)
		By either adding or subtracting the resulting signals, this can generate a lower or uppersideband signal.
		When the "wrong" sideband is only partially suppressed, the resulting modulation technique is known as vestigial-sideband(VSB) modulation.
		This is commonly used in NTSC television signals broadcast in the U.S. Canada, Mexico, and Japan, to conserve bandwidth.
	www.therfcc.org /vestigial-sideband-modulation-43892.html (518 words)

	Modulated pulse doppler sensor - US Patent 6426716 (Site not responding. Last check: 2007-11-06)
		A threshold detector is connected to the upper sideband channel for inbound displacement sensing.
		5C is a block diagram of a phasing type SSB (single sideband) demodulator 60 of the present invention.
		The SSB matrix adds the two quadnet outputs to form the LSB (lower sideband) output, and subtracts the two quadnet channels to form the USB (upper sideband) output.
	www.patentstorm.us /patents/6426716.html (6608 words)

	8VBS 8-level vestigial sideband modulation
		A/53 can transport 18 different formats of information and A/53 is extensible, meaning the standard has the ability to expand and change as time goes by.
		8-VSB is the 8-level Trellis coded Vestigial SideBand Modulation developed by Zenith and adopted for FCC and ATSC(Advanced Television Systems Committee) standard of DTV (Digital TeleVision) in the USA.
		To recover the original signal from an SSB signal, the carrier must be replaced with an extra substitute carrier signal, sometimes called a "false carrier", prior to sending the signal to a standard envelope detector.
	www.8vsb.com (691 words)

	Terme (Site not responding. Last check: 2007-11-06)
		Modified AM transmission in which one sideband, the carrier, and only a portion of the other sideband are
		A modified double-sideband transmission in which one sideband, the carrier, and only a portion of the other
		A system of transmission in which one sideband and its complementary vestigial sideband are utilised.
	doc-telecom.enst-bretagne.fr /doc-telecom/terme.jsp?17706 (50 words)

	MODULATION CODES (Site not responding. Last check: 2007-11-06)
		A2D -amplitude modulation data transmission, double sideband and using a modulating subcarrier;
		J1D -amplitude modulation data transmission, single sideband, suppressed carrier, using a modulating subcarrier;
		K2A -on-off keying telegraphy of one or several audio modulating frequencies, or by on-off keying of a modulated carrier transmitted by pulses (special case: unkeyed modulated carrier transmitted by pulses);
	worleys.com /reference/hamradio/modcodes.htm (426 words)

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