Skip to main content

Baseband

What is Baseband?

Baseband is a signal that has a near-zero frequency range, i.e. a spectral magnitude that is nonzero only for frequencies in the vicinity of the origin (termed f = 0) and negligible elsewhere. In telecommunications and signal processing, baseband signals are transmitted without modulation, that is, without any shift in the range of frequencies of the signal. Baseband has a low-frequency—contained within the bandwidth frequency close to 0 hertz up to a higher cut-off frequency. The baseband can be synonymous with lowpass or non-modulate, and is differentiate from passband, bandpass, carrier-modulate, intermediate frequency, or radiofrequency (RF).


Baseband Signal

Spectrum of a baseband signal, energy “E” per unit frequency as a function of frequency “f”. The total energy is the area under the curve.

Baseband Signal

A base-band signal or lowpass signal is a signal that can include frequencies that are very near zero, by comparison with its highest frequency (for example, a sound waveform can be considered as a basebands signal, whereas a radio signal or any other modulated signal is not).

A base-band bandwidth is equal to the highest frequency of a signal or system, or an upper bound on such frequencies, for example, the upper cut-off frequency of a low-pass filter. By contrast, passband bandwidth is the difference between the highest frequency and a nonzero lowest frequency.

Baseband Channel

A basebands channel or lowpass channel (or system, or network) is a communication channel that can transfer frequencies that are very near zero. Examples are serial cables and local area networks (LANs), as opposed to passband channels such as radio frequency channels and passband filtered wires of the analog telephone network. Frequency division multiplexing (FDM) allows an analog telephone wire to carry a basebands telephone call, concurrently as one or several carrier-modulated telephone calls.

Baseband Processor

A base-band processor is also known as BP or BBP is used to process the down-converted digital signal to retrieve essential data for the wireless digital system. The basebands processing block in GNSS receivers is usually responsible for providing observable data: code pseudo-ranges and carrier phase measurements, as well as navigation data.

Digital Baseband Transmission

Digital base-band transmission, also known as line coding, aims at transferring a digital bit stream over basebands channel, typically an unfiltered wire, contrary to passband transmission, also known as carrier-modulated transmission. Passband transmission makes communication possible over a bandpass filtered channel, such as the telephone network local-loop or a band-limited wireless channel.


Related Post






 

Labels:

Comments

Post a Comment

Popular posts from this blog

Printer

What is Printer? Another widely used output device is a printer and it is a computer peripheral device. A printer produces a hard copy of a processed text or a result. A hard copy refers to a permanent human-readable text or graphics taken on physical print media such as paper or transparency. A printer will use toner to provide a quality print on paper, a toner is a replaceable material. Once the toner gets empty we can refill it and reuse it.  Most of the printers are used for commercial purposes such as private offices, industries, government offices, photo studios, etc,. Most of the printers are used to print emails, documents, files, images, color photos, color documents, color posts, banners, advertisement posters, etc,. There are the following 5 types of printers such as dot matrix printer, inkjet printer, laser printer, dye-sublimation printer, and plotter printer this are all the printer which uses nowadays for a printing purpose. A printer is characterized by the followin...
6 comments
Read more

Dot Matrix Printer

What is Dot Matrix Printer? A dot matrix printer or impact matrix printer refers to a type of computer printers with a print head that contains a cluster of pins. The pins run back and front on the page and print by impact with striking an ink-soaked cloth ribbon against a paper similar to a typewriter. The Dot-matrix printers can print at a speed of 500 cps. Therefore a low-resolution dot matrix printers use 9 pins and a high-resolution dot matrix printer uses 24 pins. Then the low-resolution dot matrix is use to apply ink on the surface for layout.  In this a printer is able to print different patterns but not only the specific characters. Then a Dot-matrix printers are work as a non-impact method such as laser printers or inkjet printers where they also use the same process for printing. In this each dots produce by a wire or pin which is a tiny metal rod. The tiny electromagnet give the power to move forward directly small levers and a ribbon mask holder which facing the papers...
Post a Comment
Read more

OMR Scanner

What is OMR Scanner? The OMR scanner puts a shining beam of light on the document and detects the marked area from unmarked ones. This is possible because a marked area reflects more light in comparison to an unmarked area. An Optical Mark Recognition technique is use when students have appeared for objective type tests and they had to mark their answer by darkening a square or circular space by pencil. These answer sheets are directly fed to a computer for grading where OMR is use. Then users create their own forms in a word processor by using desktop OMR software and print it by a laser printer. The process of desktop OMR software is to work with an image scanner with the help of a document feeder which produces forms once filled out. For adding marks on OMR sheets a folder inserter equipment is use. In the sequence of black dashes in sheets the marks are added and the folder inserter equipment scans in order to determine and the usage area of OMR sheets are, It normally used for con...
Post a Comment
Read more