baseband


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baseband

[′bās‚band]
(communications)
The band of frequencies occupied by all transmitted signals used to modulate the radio wave.

baseband

A transmission medium through which digital signals are sent without frequency shifting. In general, only one communication channel is available at any given time.

Ethernet is an example of a baseband network.

See also broadband.

baseband

Electronic data in their original form. Baseband refers to analog or digital data before being intermixed with other data. See multiplexing and modulation.

For Example
The output of an analog microphone is baseband. When an FM station's carrier frequency is stripped away in the radio (demodulated), the original audio signal that you hear is the baseband signal. See frequency modulation.

Ethernet transmission is considered baseband, because signals are not intermixed and occupy the full bandwidth of the line. In fact, "base" is part of the Ethernet version name (see 10Base-T and 100Base-T).

When a compressed digital audio signal such as MP3 is transcoded to another format, it is decompressed back to the original bit rate (the baseband signal) before it is compressed into the new format (for a specific example, see aptX). See baseband processor.


Baseband Video
In this cable TV set-top box manual, "baseband video" refers to the composite video signal from an analog VCR or camcorder, which comprises only video frames not intermixed with the audio. See composite video and carrier frequency.
References in periodicals archive ?
In May 2011, Icera was acquired by US tech company Nvidia, which decided to wind down its baseband chipset business line in 2015.
Based on the interferer information from transmitter baseband, the feedforward path gives the correct control signal with accuracy and speed.
The TNS4200 bridges both baseband and IP technology, enabling services to be monitored efficiently across technologies to ensure quality of service (QoS) and quality of experience (QoE).
Taiwanese Smartphone Baseband Processor Market Volume Share by Solution Provider, 1Q 2012 - 1Q 2014
* iPhone 3G/3GS on basebands 04.26.08, 05.11.07, 0.5.12.01, 05.13.04 or 06.15.00
To support these wireless standards, a signal processing circuit (baseband processor) compliant with each computation is required.
Spreadtrum's SC6530 is reportedly the industry's first 2.5G baseband designed with 40nm CMOS process technology.
"Support for the TD-SCDMA wireless standard significantly lowers the entry barrier and the design challenges baseband vendors are facing in targeting the subscriber base of China Mobile, the world's largest wireless operator, with more than 650 million subscribers." CEVA's TD-SCDMA software libraries support the latest TD-SCDMA technology compliant with the 3GPP Rel-9 worst case conditions and are user-configurable based on customer needs, including interleaver, rate matching, modulation type (8PSK, QPSK, 16QAM, 64QAM), HARQ, and more.
The stimulus signal is sampled first at I-Q baseband by the oscilloscope (taking advantage of its dual-channel inputs) and then again at RF by a traditional signal analyzer.
Targets and initiators on the application processor and the baseband processor exchange transactions without software intervention - thus reducing latency.
MissionMobility is a Solutions Engineering company that develops and integrates secure, deployable Baseband Communication Solutions.
The parties have agreed to continue the WiMAX baseband software related product development together, with Nokia Siemens Networks purchasing WiMAX product development work from EB as a service.