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modems
(57 results)-
White Papers
A Low-Cost 60 GHz OFDM Modem
May 2009
A simple soft-demapping scheme for Rectangular Quadrature Amplitude Modulation (R-QAM) signals is developed for a low-cost 60 GHz OFDM baseband chip design, conforming to the IEEE802.15.3C...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Extended Loops for Distant Phones and Fax Machines, Higher Ringing Voltage and Loop Current
Apr 2008
Enterprises are turning to Voice-over-IP (VoIP) and IP telephony solutions for voice communications in corporate and branches so that they can reap the benefits of converged networks and...
Provided by Cisco Systems
-
White Papers
NAMS: A Networked Acoustic Modem System for Underwater Applications
Sep 2011
In this paper, the authors present a Networked Acoustic Modem System (NAMS) by integrating a high-speed OFDM modem and a comprehensive underwater network protocol stack for underwater...
Provided by University of Connecticut
-
White Papers
Localization and Tracking of Underwater Physical Systems
Jun 2011
In this paper, the authors investigate the problem of localizing an underwater sensor node based on message broadcasting from multiple surface nodes. With the time-of-arrival measurements from a...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
A DSP Implementation of OFDM Acoustic Modem
Sep 2007
The success of multicarrier modulation in the form of OFDM in radio channels illuminates a path one could take towards high-rate underwater acoustic communications, and recently there are...
Provided by Association for Computing Machinery
-
White Papers
Towards Gigabit DSL (GDSL): Design of a CC/MC-CDMA Modem
Sep 2007
With the introduction of VDSL2 and the implementation of Fibre-To-The-Curb (FTTC), the theoretical limit of DSL technology is pushed even further than currently known ADSL technology. Current...
Provided by Institute of Electrical and Electronics Engineers
-
Case Studies
Microte: Quick-to-Market Solution From a Source They Could Trust
Aug 2007
Microtel manufactures telephone and cellular voice dialers, and has served the industry since 1983. Microtel GSM is notorious for introducing "Bumblebee" noise into the audio path. In addition to...
Provided by Multi-Tech Systems
-
Case Studies
Embedded Device Networking for Industrial Environments
Aug 2007
N-TRON Corp. develops, manufactures, and markets highly reliable industrial network products. Ruggedized versions of computing equipment are commonplace in factories today. A large portion of this...
Provided by Multi-Tech Systems
-
Case Studies
ERCO&GENER: Turnkey M2M Data Collection With Universal Socket Connectivity Equals Off-the Shelf Solutions
Jan 2008
ERCO & GENER has been providing the M2M market with turnkey and off-the-shelf solutions. Their challenge is that applications such as remote surveillance and remote maintenance requiring...
Provided by Multi-Tech Systems
-
White Papers
Rate-Range for an FH-FSK Acoustic Modem
Sep 2007
Signals transmitted through underwater channels experience attenuation due to dissipation of acoustic energy by spreading as well as by absorption. The path loss due to absorption is found to be...
Provided by Association for Computing Machinery
-
White Papers
Function Modulation - The Theory for Green Modem
Jun 2010
Bandwidth of a digital communication channel is a valuable natural resource. Therefore it is important that the usage of this resource is minimized by carefully designing the digital modems. In...
Provided by IARIA
-
White Papers
Proposal for Ground Shipping High Volume of Data Parameter in Supersampling Unmanned Aircraft Through Radio Modem
Oct 2011
In an unmanned aircraft, large volumes of data are generated by the various sensors installed on the aircraft. At critical moments such as take-off, landing, parachute openings, or when the...
Provided by IARIA
-
Whitepapers
An Ultrasonic Sensor Based Low-Power Acoustic Modem for Underwater Communication in Underwater Wireless Sensor Networks
Nov 2007
Applications of underwater sensor networks involve environmental monitoring, disaster prevention, and resource detection. As the importance of these applications has recently grown, underwater...
Provided by International Federation for Information Processing
-
Whitepapers
On Reduced-Complexity Soft-Output Detection of Continuous Phase Modulations
Apr 2008
The authors compare low-complexity schemes for soft-output detection of Continuous Phase Modulations (CPMs). In particular, they address the problem of minimizing the complexity of the front end...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
u-MoDEM : ubiquitous Mobile Device Environment Manager Based on OMA-DM
Feb 2008
Now-a-days, computing technology's improvement changes user's life style. A Ubiquitous Sensor Network technology senses the context information and helps user's activities. An Information...
Provided by Sungkyunkwan University
-
Whitepapers
A Robust Frequency Tracking Loop at the ENodeB for LTE Uplink
Jul 2008
4G systems like LTE (Long Term Evolution) provide an uplink data rate up to 80 Mbps, utilize higher order modulation (64-QAM) and introduce Space Division Multiple Access (SDMA) to improve...
Provided by Institute of Electrical & Electronic Engineers
-
Case Studies
Dental Practice Software Provider Reduces Support Costs by an Estimated $5,187 Per Day Using Remote Desktop Support Appliance
Sep 2008
With 272 of their over 700 employees devoted to support, PracticeWorks, Inc. wanted to enhance their web-based support presence through remote support. They needed a solution that enabled a fast...
Provided by Bomgar
-
White Papers
What Is the Difference Between a Cellular Modem and a Cellular IP Modem?
Aug 2008
Cellular modems and cellular IP modems are vital components in industrial cellular Machine-to-Machine (M2M) networking. However, it may be difficult to differentiate between these two devices...
Provided by Moxa
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White Papers
What You Don't Know About Industrial GSM/GPRS Modem Communications
Apr 2009
Cellular communications are becoming increasingly popular in industrial process applications where traditional wired and wireless communications are not possible. The cellular network provides...
Provided by PHOENIX CONTACT
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White Papers
Evolution Modem TCP/IP Functionality White Paper
Jan 2009
This paper describes the TCP/IP capabilities of the Paradise Datacom Evolution series of satellite modems. This report the Evolution modem TCP/IP features and performance, including network...
Provided by Paradise Datacom
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Case Studies
HP Case Study: Greenbriar Resources
Jan 2010
Greenbriar Resources is a small consulting firm, based in Underhill, VT, which provides business planning, and sales & marketing services for small and mid-size companies. The company sought an...
Provided by Hewlett-Packard (HP)
-
Case Studies
HP Case Study: C&C Films
Jan 2010
C&C Films is a global film studio offering a complete range of film and video production services ranging from generating storyboards to post-production work and marketing. Because of this digital...
Provided by Hewlett-Packard (HP)
-
Case Studies
Cable Broadband Operator Sees High Growth After Installing New Device Provisioning System
Jan 2009
A progressive Asia-based communications company wanted to increase subscribership and revenues with premium-quality voice and data service bundles at competitive prices. The company needed to make...
Provided by Incognito Software
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Case Studies
Hewlett-Packard Development Company: Networking Case Study
Jan 2010
Greenbriar Resources is a consultancy firm situated in Underhill, VT that offers business consultation to its constantly growing clientele. Greenbriar Resources was facing a lot of difficulty due...
Provided by Hewlett-Packard (HP)
-
White Papers
Evolution Modem TCP/IP Functionality
Jan 2009
The TCP/IP capabilities of the Paradise Datacom Evolution series of satellite modems include the capability of auto sensing the cable type. It has been found that auto-sensing is not implemented...
Provided by Paradise Datacom
-
White Papers
Recommended Practice for Securing Control System Modems
Jan 2008
The overall security of a control system is only as good as its weakest link. Modems represent an often overlooked "Backdoor" to control systems. We know that modems are configured for dial up,...
Provided by US-CERT
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White Papers
Video: Circumstances and Customers Have Changed. Has Your Loyalty Program Kept Pace?
Dec 2009
The economic downturn is forcing businesses to tighten their belts and look for more efficient channels. Using the Internet as a business channel, and sometimes even the only channel, is becoming...
Provided by Oracle
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White Papers
Enhance Customer Loyalty through Higher Responsiveness
Apr 2009
The economic downturn is forcing businesses to tighten their belts and look for more efficient channels. Using the Internet as a business channel, and sometimes even the only channel, is becoming...
Provided by Oracle
-
Case Studies
Dental Practice Software Provider Reduces Support Costs by an Estimated $5,187 Per Day Using Remote Desktop Support Appliance
Sep 2008
With 272 of their over 700 employees devoted to support, PracticeWorks, Inc. wanted to enhance their web-based support presence through remote support. They needed a solution that enabled a fast...
Provided by Bomgar
-
White Papers
Extended Loops for Distant Phones and Fax Machines, Higher Ringing Voltage and Loop Current
Apr 2008
Enterprises are turning to Voice-over-IP (VoIP) and IP telephony solutions for voice communications in corporate and branches so that they can reap the benefits of converged networks and...
Provided by Cisco Systems
-
White Papers
Orthogonal Frequency Division Multiplexing (OFDM)
May 2001
OFDM is a promising candidate for achieving high data rate transmission in mobile environment. The application of OFDM to high data rate mobile communication system is being investigated by many...
Provided by Helsinki University of Technology
-
White Papers
The Principles of OFDM
Jan 2001
The principles of orthogonal frequency division multiplexing (OFDM) modulation have been in existence for several decades. However, in recent years these techniques have quickly moved out of...
Provided by Penton Media
-
White Papers
Broadband MIMO-OFDM Wireless Communications
Feb 2004
Orthogonal frequency division multiplexing (OFDM) is a popular method for high data rate wireless transmission. OFDM may be combined with antenna arrays at the transmitter and receiver to increase...
Provided by Georgia Institute of Technology
-
White Papers
Design and Simulation of Orthogonal Frequency Division Multiplexing (OFDM) Signaling
May 2001
A MATLAB program has been written to investigate Orthogonal Frequency Division Multiplexing (OFDM) communication systems. This program is valuable for future researchers simulating systems that...
Provided by Bradley University
-
White Papers
A Low-Cost 60 GHz OFDM Modem
May 2009
A simple soft-demapping scheme for Rectangular Quadrature Amplitude Modulation (R-QAM) signals is developed for a low-cost 60 GHz OFDM baseband chip design, conforming to the IEEE802.15.3C...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Extended Loops for Distant Phones and Fax Machines, Higher Ringing Voltage and Loop Current
Apr 2008
Enterprises are turning to Voice-over-IP (VoIP) and IP telephony solutions for voice communications in corporate and branches so that they can reap the benefits of converged networks and...
Provided by Cisco Systems
-
White Papers
NAMS: A Networked Acoustic Modem System for Underwater Applications
Sep 2011
In this paper, the authors present a Networked Acoustic Modem System (NAMS) by integrating a high-speed OFDM modem and a comprehensive underwater network protocol stack for underwater...
Provided by University of Connecticut
-
White Papers
Localization and Tracking of Underwater Physical Systems
Jun 2011
In this paper, the authors investigate the problem of localizing an underwater sensor node based on message broadcasting from multiple surface nodes. With the time-of-arrival measurements from a...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
A DSP Implementation of OFDM Acoustic Modem
Sep 2007
The success of multicarrier modulation in the form of OFDM in radio channels illuminates a path one could take towards high-rate underwater acoustic communications, and recently there are...
Provided by Association for Computing Machinery
-
White Papers
Towards Gigabit DSL (GDSL): Design of a CC/MC-CDMA Modem
Sep 2007
With the introduction of VDSL2 and the implementation of Fibre-To-The-Curb (FTTC), the theoretical limit of DSL technology is pushed even further than currently known ADSL technology. Current...
Provided by Institute of Electrical and Electronics Engineers
-
Case Studies
Microte: Quick-to-Market Solution From a Source They Could Trust
Aug 2007
Microtel manufactures telephone and cellular voice dialers, and has served the industry since 1983. Microtel GSM is notorious for introducing "Bumblebee" noise into the audio path. In addition to...
Provided by Multi-Tech Systems
-
Case Studies
Embedded Device Networking for Industrial Environments
Aug 2007
N-TRON Corp. develops, manufactures, and markets highly reliable industrial network products. Ruggedized versions of computing equipment are commonplace in factories today. A large portion of this...
Provided by Multi-Tech Systems
-
Case Studies
ERCO&GENER: Turnkey M2M Data Collection With Universal Socket Connectivity Equals Off-the Shelf Solutions
Jan 2008
ERCO & GENER has been providing the M2M market with turnkey and off-the-shelf solutions. Their challenge is that applications such as remote surveillance and remote maintenance requiring...
Provided by Multi-Tech Systems
-
White Papers
Rate-Range for an FH-FSK Acoustic Modem
Sep 2007
Signals transmitted through underwater channels experience attenuation due to dissipation of acoustic energy by spreading as well as by absorption. The path loss due to absorption is found to be...
Provided by Association for Computing Machinery
-
White Papers
Function Modulation - The Theory for Green Modem
Jun 2010
Bandwidth of a digital communication channel is a valuable natural resource. Therefore it is important that the usage of this resource is minimized by carefully designing the digital modems. In...
Provided by IARIA
-
White Papers
Proposal for Ground Shipping High Volume of Data Parameter in Supersampling Unmanned Aircraft Through Radio Modem
Oct 2011
In an unmanned aircraft, large volumes of data are generated by the various sensors installed on the aircraft. At critical moments such as take-off, landing, parachute openings, or when the...
Provided by IARIA
-
Whitepapers
An Ultrasonic Sensor Based Low-Power Acoustic Modem for Underwater Communication in Underwater Wireless Sensor Networks
Nov 2007
Applications of underwater sensor networks involve environmental monitoring, disaster prevention, and resource detection. As the importance of these applications has recently grown, underwater...
Provided by International Federation for Information Processing
-
Whitepapers
On Reduced-Complexity Soft-Output Detection of Continuous Phase Modulations
Apr 2008
The authors compare low-complexity schemes for soft-output detection of Continuous Phase Modulations (CPMs). In particular, they address the problem of minimizing the complexity of the front end...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
u-MoDEM : ubiquitous Mobile Device Environment Manager Based on OMA-DM
Feb 2008
Now-a-days, computing technology's improvement changes user's life style. A Ubiquitous Sensor Network technology senses the context information and helps user's activities. An Information...
Provided by Sungkyunkwan University
-
Whitepapers
A Robust Frequency Tracking Loop at the ENodeB for LTE Uplink
Jul 2008
4G systems like LTE (Long Term Evolution) provide an uplink data rate up to 80 Mbps, utilize higher order modulation (64-QAM) and introduce Space Division Multiple Access (SDMA) to improve...
Provided by Institute of Electrical & Electronic Engineers
-
Case Studies
Dental Practice Software Provider Reduces Support Costs by an Estimated $5,187 Per Day Using Remote Desktop Support Appliance
Sep 2008
With 272 of their over 700 employees devoted to support, PracticeWorks, Inc. wanted to enhance their web-based support presence through remote support. They needed a solution that enabled a fast...
Provided by Bomgar
