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Topic: Baseband

Related Topics

Frequency division multiplexing

Vestigial sideband

Frequency modulation

Intermediate frequency

Amplitude modulation

Sideband

Modulation

Envelope detector

Phase modulation

Bandwidth

Broadband

Wideband

Frequency

Narrowband

Band (radio)

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	Baseband - Wikipedia, the free encyclopedia
		More precisely, a signal "at baseband" is usually considered to comprise all relevant frequencies from 0Hz up to the highest frequency component in the signal with significant power.
		Thus, the RF bandwidth of a signal is usually twice its baseband bandwidth.
		The simplest definition is that a signal's baseband bandwidth is its bandwidth before modulation and multiplexing, or after demultiplexing and demodulation.
	en.wikipedia.org /wiki/Baseband (338 words)

	Multiplex baseband - Wikipedia, the free encyclopedia
		In frequency-division multiplexing, the frequency band occupied by the aggregate of the signals in the line interconnecting the multiplexing and radio or line equipment.
		This is the group-level baseband that results from combining 12 voice-frequency input channels, having a bandwidth of 4 kHz each, including guard bands.
		Ten super groups are in turn multiplexed into one master group, the output of which is a baseband that may be used to modulate a microwave-frequency carrier.
	en.wikipedia.org /wiki/Multiplex_baseband (219 words)

	Broadband and baseband LAN - Patent 4885747
		The high frequency transformer includes three coils symmetrically arranged on a magnetic core and poled so that baseband signals are carried as a balanced signal on the twisted wire pair and the broadband signals are carried as an unbalanced signal on the twisted wire pair relative to the shield of the cable.
		It should be noted that since the baseband signal is balanced and the broadband signal is "equally unbalanced" on the twisted pair shielded conductor, the baseband receiver circuit is insensitive to any broadband signal that may leak.
		Likewise, baseband signals inputted at the baseband signal port of F-coupler 50 are extracted at the baseband signal port of F-coupler 51.
	www.freepatentsonline.com /4885747.html (5977 words)

	RF amplifier method and apparatus - Patent 5783968
		The RF amplifier of claim 14, where the baseband leg comprises a baseband in-phase path and a baseband quadrature path and the stabilizing means includes means for applying the baseband reference signal to the baseband quadrature path.
		The RF amplifier of claim 14, where the baseband leg comprises a baseband in-phase path and a baseband quadrature path and the stabilizing means includes means for applying the baseband reference signal to the baseband in-phase path and in quadrature to the baseband quadrature path.
		As shown, during the initial stabilizing mode 201, the baseband reference signal 210 comprises a sine wave and the input RF signal 220 is substantially null.
	www.freepatentsonline.com /5783968.html (4336 words)

	Baseband Layer Tutorial
		The Baseband is the physical layer of the Bluetooth.
		The baseband protocol is implemented as a Link Controller, which works with the link manager for carrying out link level routines like link connection and power control.
		When a unit have acknowledged the reception of the FHS packet, this unit uses the new piconet parameters defined by the new master and the piconet switch is completed.
	www.palowireless.com /infotooth/tutorial/baseband.asp (2433 words)

	Baseband Video Transmission
		The broadcast baseband applications typically use a BNC connector and the consumer baseband applications typically uses an RCA connector.
		he most basic form of a television signal is a baseband video signal, also referred to as a composite video signal.
		In an AM baseband system, the input signal directly modulates the strength of the transmitter output, in this case light.
	www.fiber-optics.info /articles/baseband-video.htm (494 words)

	Baseband Network (Linktionary term)
		Baseband is a transmission method in which direct current pulses are applied directly to the cable to transmit digital signals.
		For more information, see "Signals." A baseband network is usually limited to a local area.
		Ethernet is a baseband network that transmits only one signal at a time.
	www.linktionary.com /b/baseband.html (292 words)

	RC FM Baseband Signal
		The baseband signal then goes into the RF module (radio frequency module), where it is modulated into a higher frequency.
		The baseband signal in my Futaba Challenger FM set (and any standard FM set for that matter), is a series of pulses of fixed duration.
		It is quite easy to produce the baseband signal using some kind of counter-timer chip, and interrupts (see my home page and walking robot Gokiburi; it drives 12 RC servos off a Z80, with very little overhead.
	www.geocities.com /BourbonStreet/3220/servotx.html (1259 words)

	Semiconductors - Bluetooth Baseband & Controllers
		PBM 990 90 Bluetooth Baseband Controller is a generic baseband controller designed to be suitable for both host and embedded solutions.
		The baseband controller, together with a radio module and a Flash memory, form a complete Bluetooth system to be used in a variety of applications.
		BSN6040 Baseband Processor is a point-to-multipoint solution when combined with tge TRF6001 that addresses the needs of wireless personal area networking devices such as laptops, PDAs and smart phones.
	www.bluetoothweb.org /Bluetooth_Development/Semiconductors_Bluetooth_Baseband.htm (3481 words)

	baseband pulse shaping filter
		Baseband filtering is advantageous because the filters operate at low power levels, are lightweight, do not reduce transmitted RF power and are small and simple (lowpass rather than a bandpass).
		Baseband filtering of phase-modulated signals suffers from the disadvantage of introducing spikes into the RF spectrum [2].
		Despite this limitation, baseband filtering is the only practical method to limit the transmitted RF spectrum for the purpose of improving bandwidth efficiency.
	rfdesign.com /mag/radio_simulation_realization_baseband (1525 words)

	Agilent Technologies' Baseband Studio Makes Design Verification
		Consequently, designers are working to verify the performance of their baseband circuits and algorithms at early stages of design to save the time, cost, and aggravation of debugging algorithms and redesigning circuits after hardware has been built.
		Agilent N5115A Baseband Studio for fading provides digitally integrated single- and dual-channel fading simulation of baseband signals generated by the ESG as well as calibrated additive white Gaussian noise (AWGN) in a single solution that is easy to set up.
		Baseband Studio for fading is expected to support the Agilent 8960 wireless communication test set by March 2004.
	www.rfglobalnet.com /content/news/article.asp?docid={C8B62D84-3E43-4545-9D7C-FB30E4B1FAB6}&VNETCOOKIE=NO (851 words)

	Most highly integrated DAB baseband so far: News from Texas Instruments
		It is the first DAB baseband to include on-chip support for features such as record and playback from Flash memory or a MultiMedia Card (MMC), time-shift recording and the capability for simultaneously listening to and recording different channels.
		"TI's DRE310 digital baseband allows us to quickly develop differentiated digital radio products for the market, such as the DR301 portable multimedia DAB receiver with time-shift recording, a built-in MP3 player and voice recorder, scheduled for release in the 4th quarter of 2003", said Ike Park, CEO of Personal Telecom.
		baseband processor will sample in the fourth quarter of 2003.
	www.electronicstalk.com /news/tex/tex459.html (665 words)

	Digital Transmission -- Limits on Baseband Transmission (Site not responding. Last check: 2007-10-07)
		The factors limiting the transmission rate of baseband signals involve another aspect of the behavior of electromagnetic waves that varies with frequency, their speed.
		The reader should notice that although we are emphasizing the impact of dispersion on baseband transmission, broadband transmissions are also subject to this effect.
		In a baseband system, when one's transmission rate reaches the limit imposed by dispersion, you can't simply use another channel to get more capacity out of the cable.
	www.cs.williams.edu /~cs105/s01/text/ch3/DigitalTrans_19.html (1383 words)

	EETimes.com - FPGA use in software-defined radios
		Baseband signal processing devices require enormous processing bandwidth to support the computationally intensive algorithms used in these techniques.
		The baseband components also must be flexible enough to enable the SDR to support migration between enhanced versions of the same standard, as well as support completely different standards.
		In digital upconversion, the input data is baseband filtered and interpolated before it is quadrature-modulated with a tunable carrier frequency.
	www.eetimes.com /showArticle.jhtml?articleID=29100653 (1146 words)

	Philips New Family of Baseband Chips Advances Mobile Multimedia Applications (Site not responding. Last check: 2007-10-07)
		This highly integrated product family is the first quad-band (850/900/1800/1900) baseband range of products to be based on an ARM9 CPU and an Adelante Saturn 16-bit DSP combining Philips' expertise in semiconductor baseband and multimedia.
		This new leading-edge baseband family is Class 12 EGPRS-capable, meaning the EDGE modulation is on top of the packet environment of GPRS.
		A state-of-the-art set of development tools for system debug and software development is available to accompany the baseband and, as an option, Philips can provide fully validated software components such as protocol stack and multimedia applications, shortening development time for handset manufacturers.
	www.cellular.co.za /news_2002/061102-philips_new_family_of_baseband_c.htm (666 words)

	Bluetooth Glossary
		Each baseband packet starts with an Access code, which can be one of 3 types, CAC, DAC and IAC.
		The PIN is used in the pairing procedure to generate the initial link that is used for further identification.
		The PIN(BB) is used by the baseband mechanism for calculating the initialization key during the pairing procedure.
	www.palowireless.com /infotooth/glossary.asp#bluetooth (5094 words)

	Baseband vs. Broadband - Computer Networks (Site not responding. Last check: 2007-10-07)
		Baseband uses very simple transceiver devices that send and receive signals on a cable.
		The simplicity behind baseband signaling is that only three states need to be distinquished: one, zero and idle.
		Because of its simplicity, baseband signaling is used on most Ethernet networks.
	www.bellaonline.com /ArticlesP/art14917.asp (156 words)

	Strategic Analysis of the European RF & Baseband Semiconductor Markets for Handsets
		Integration of the RF and baseband sides of the handset semiconductor market is becoming increasingly common to meet the need for reduced form factor and added features in handsets.
		Baseband Semiconductors (Handsets): The baseband section of a mobile handset receives the down-converted I and Q baseband signals from the RF-block and processes/converts these signals into analog audio signals that we hear.
		At the transmit end, the baseband section processes/converts the voice signal into I and Q baseband analog signals that are further converted/processed in the RF-block and transmitted over the air.
	www.frost.com /prod/servlet/report-brochure.pag?id=B308-01-00-00-00 (1992 words)

	Quad-band baseband chip has the Edge on top: News from Philips Semiconductors
		This highly integrated product family is the first quad-band (850/900/1800/1900) baseband range of products to be based on an ARM9 CPU and an Adelante Saturn 16bit DSP combining Philips' expertise in semiconductor baseband and multimedia.
		This new leading-edge baseband family is Class12 EGPRS-capable, meaning the Edge modulation is on top of the packet environment of GPRS.
		It also enables baseband cellular handset manufacturers to develop enhanced mobile phone terminals with usable datarates up to 300Kbit/s.
	www.electronicstalk.com /news/phi/phi148.html (583 words)

	Bluetooth baseband semiconductors, components, chips, baseband core, processors & Application IC
		Bluetooth baseband semiconductors, chips components, baseband core, processors and Application IC Directory of bluetooth semiconductors, chips, components, baseband core, processors, application ics, radio transceivers and other wireless semiconductors; from companies including philips semiconductor, signia, conexant and ericsson microelectronics.
		If you know of other bluetooth semiconductors, chips, components, baseband core, processors, application ics, radio transceivers and other wireless semiconductors from other Bluetooth firms please add the company details.
		Bluetooth Baseband MTC-60180 is a fully integrated Bluetooth baseband, offering a compact and complete solution for short-range wireless connectivity.
	www.thewirelessdirectory.com /Bluetooth-Development/Semiconductors-Bluetooth-Baseband.htm (968 words)

	[No title]
		In terms of attenuation, for example, RG-59 baseband cable can be run to 600 feet (200 meters), and RG-6 and RG-11 baseband cable are effective to 850 feet (270 meters) and 1200 feet (400 meters), respectively.
		For baseband applications, the cable typically used is 62.5/125- micron multimode fiber, while broadband normally uses single-mode fiber.
		Baseband video signals can also be transmitted over unshielded twisted pair cable (you need suitable adapters for this).
	www.epanorama.net /documents/video/videocoax.html (3487 words)

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