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What is a baseband processor?

In signal processing, baseband describes signals and systems whose range of frequencies is measured from zero to a maximum bandwidth or highest signal frequency. It is sometimes used as a noun for a band of frequencies starting at zero.
In telecommunications, it is the frequency range occupied by a message signal prior to modulation.
It can be considered as a synonym to low-pass.
Baseband is also sometimes used as a general term for part of the physical components of a wireless communications product. Typically, it includes the control circuitry (microprocessor), the power supply, and amplifiers.
A baseband processor is an IC that is mainly used in a mobile phone to process communication functions.

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1999-11-08	Secure wireless data control using ZiLOG's Z87L02/L03/L09 This application note will focus on the data control features of the Z87L02/L03/L09 Wave Chip?a wireless baseband processor designed to implement frequency-hopping spread-spectrum communications in the ISM bands.
2005-06-08	Schematic and layout guidelines for high-speed data converters This app note presents proper layout techniques, component selection, and placement for high-speed ADCs commonly used in IF and baseband applications
2005-02-25	Sasken develops GSM/GPRS chip with Rohm Sasken Communication Technologies Ltd said it has developed a complete GSM/GPRS chipset solution, including the baseband and protocol software, with Japan-based semiconductor supplier Rohm Co. Ltd.
2002-06-21	Sandbridge enters wireless processor market Sandbridge Technologies Inc. has joined the multimode wireless processor market through the Sandblaster software defined radio.
2002-10-25	Samsung to construct logic fab in system LSI push Samsung Electronics Co. Ltd expects to invest $3.6 billion in its system-LSI business by 2007, including a dedicated 300mm logic fabrication facility at Onyang, South Korea.
2004-04-13	Samsung selects Teradyne FLEX test system Samsung Electronics Co. Ltd has selected Teradyne Inc.'s FLEX test system for next-generation multisite package test.
2009-01-06	Samsung expands WiMAX, LTE silicon portfolio Samsung is working on basebands for LTE and mobile WiMAX networks as well as media accelerators.
2004-08-10	SafeNet rolls mobile security suite for TI OMAP processor SafeNet released a software development kit that allows designers to secure mobile phones developed around Texas Instruments' OMAP5912 baseband processor.
2004-03-01	RF integration strategies for HF, LF systems This gives an overview on the needs and options for integrating passive components and technologies together with the RF active parts in a multichip package.
2005-02-17	Renesas, Symbian collaborate on 3G mobile phone platform Renesas Technology Corp. and Symbian Ltd have entered into an agreement to add full-scale support for Symbian OS to Renesas' advanced silicon platform for 3G mobile phones.
2004-07-15	Renesas, DoCoMo to jointly develop 2.5/3G apps processor Renesas Technology has secured a $65 million, three-year development contract from Japanese mobile operator NTT DoCoMo for a single-chip baseband device to be used in dual-mode handsets operating on W-CDMA and GSM/GPRS capable networks.
2005-08-26	Renesas ships dual-mode mobile handset chip samples nesas Technology Corp. is shipping evaluation samples of a single-chip LSI that is jointly developed with NTT DoCoMo Inc.
2010-07-20	Renesas puts bid for world market in high gear With its acquisition of Nokia's modem business, Renesas makes clear its intention to take the lead in the global mobile technology market.
2004-06-08	Realtek WLAN solutions gets award in Computex Realtek Semiconductor Corp. has announced that its dual-band (2.4-, 5GHz) triple-mode (IEEE 802.11a/b/g) integrated baseband processor/media access controller (BBP/MAC), and a RF chip, respectively coded RTL8185L and RTL8255, have won the "Best Choice of Computex-Taipei 2004".
2003-01-17	Realtek integrates WLAN, MAC into 128-pin LQFP The RTL8180L single-chip 802.11b baseband processor and MAC is available in a 128-pin LQFP.
2013-03-28	RDA sets sights on a higher bidder There is some speculation that Spreadtrum is poised to acquire fellow Chinese fabless chip company, but RDA may be looking for a better deal.
2005-09-08	QSound, UTStarcom ink license agreement QSound Labs Inc. has signed a licensing agreement with UTStarcom Inc. for the microQ Synthesizer.
2004-12-01	Predicting sensitivity of ASK receivers Here's a step-by-step method on predicting sensitivity of an RF chip ASK receiver in various remote keyless systems.
2004-02-02	Polar modulation in mobile PA design Polar modulation is a useful technique for improving the efficiency and stability of a wireless transmitter when size and battery life is important.
2003-06-13	Philips, Ericsson ink Bluetooth license pact Royal Philips Electronics' semiconductor division has entered a licensing agreement with Ericsson Technology Licensing.
2003-11-21	Philips, Alcatel complete EDGE tests as AT&T net opens Philips Electronics and Alcatel will use this week's GSM Americas show to announce they have completed a series of EDGE interoperability tests at 220Kbps.
2005-12-23	Philips VoIP IC enables cheaper Internet calls Philips' new VoIP-enabled baseband chips for cordless phones will allow consumers to use a cordless phone rather than a computer or wired phone to make cheaper international and domestic calls over the Internet.
2004-11-08	Philips new solution eyes GSM/GPRS mobile handsets Philips unveiled its highly integrated Nexperia Cellular System Solution for low- to mid-end GSM/GPRS mobile handsets.
2005-02-14	Philips leaps into top 5 DSP vendors in 2004 rankings Philips Semiconductors turned in a surprise performance in 2004 as the DSP chip market increased by 27.2 percent compared with 2003, to reach a value of $7.8 billion, according to market research company Forward Concepts.
2013-02-08	Peering under the BlackBerry Z10 hood UBM TechInsights' Allan Yogasingam goes inside Blackberry's last, best hope for relevance in the smartphone market – the Z10.
2009-06-10	Palm Pre teardown intros new multitouch controller A teardown of the Palm Inc.'s Palm Pre revealed few surprises, but left two intriguing questions unanswered.
2010-05-17	NXP takes top spot in car infotainment IC list NXP BV has secured the top position in the global automotive semiconductor market in 2009 fueled by the Dutch chip vendor's exposure to China automobile makers.
2012-11-08	Nufront squares in on mobile apps processors Nufront will try to outdo competitors in the apps processor market with wireless offerings such as its first-generation GSM/WCDMA 3G baseband chip.
2004-09-24	NJR licenses CEVA-Teak DSP core New Japan Radio Co. Ltd, a manufacturer of electronic professional communication equipment, has licensed the CEVA-Teak DSP core to power their baseband radio communication solutions.
2005-03-21	NI offers faster download time NI's new RF vector signal generator and arbitrary waveform generator claim to enable engineers and scientists to generate RF and baseband signals more than 300 times faster.