22-06-2012, 10:58 AM
SOFTWARE RADIOS AND FUTURE COMMUNICATION ENGINEERING
[attachment=25054]
ABSTRACT
Software-Defined Radio (SDR) is a rapidly evolving technology that is receiving enormous
recognition and generating widespread interest in the telecommunication industry. Over the last few
years, analog radio systems are being replaced by digital radio systems for various radio
applications in military, civilian and commercial spaces. In addition to this, programmable
hardware modules are increasingly being used in digital radio systems at different functional levels.
SDR technology aims to take advantage of these programmable hardware modules to build an openarchitecture
based radio system software. SDR technology facilitates implementation of some of the
functional modules in a radio system such as modulation/demodulation, signal generation, coding
and link-layer protocols in software.
INTRODUCTION
A certain convergence occurs when multiple technologies align in time to make possible those
things that once were only dreamed. The explosive growth of the Internet starting in 1994 was one
of those events. While the Internet had existed for many years in government and education prior to
that, its popularity had never crossed over into the general populace because of its slow speed and
arcane interface. The development of the Web browser, the rapidly accelerating power and
availability of the PC, and the availability of inexpensive and increasingly speedy modems brought
about the Internet convergence. Suddenly, it all came together so that the Internet and the
worldwide Web joined the everyday lexicon of our society.
MOTIVATION
SDR has generated tremendous interest in the wireless communication industry for the wideranging
economic and deployment benefits it offers. Following are some of the problems faced by the
wireless communication industry due to implementation of wireless networking infrastructure
equipment and terminals completely in hardware:
HISTORY OF SOFTWARE RADIOs [13]
The term 'software radio' was coined in 1984 by a team at the Garland Texas Division of E-Systems
Inc. (now Raytheon). A classified, yet fairly well known, 'Software Radio Proof-of-Concept'
laboratory was developed at E-Systems that popularized Software Radio within various government
agencies. This 1984 Software Radio was a digital base band receiver that provided programmable
interference cancellation and demodulation for broadband signals, typically with thousands of
adaptive filter taps, using multiple array processors accessing shared memory.
Communications Security
Increasingly, state and local law enforcement agencies recognize the need to have secure
communications because clear communications can be easily compromised. Most federal law
enforcement agencies already have encryption capabilities and are in the process of transitioning to
Project 25-compliant encryption schemes.
Conclusion
Current market drivers such as future-proof equipment, seamless integration of new services,multimode
equipment and over-the-air feature insertion in commercial wireless networking industry have
resulted in widespread interest in SDR technology. The technology can be used to implement
wireless network infrastructure equipment as well as wireless handsets, PDAs,wireless modems and
other end-user devices.
[attachment=25054]
ABSTRACT
Software-Defined Radio (SDR) is a rapidly evolving technology that is receiving enormous
recognition and generating widespread interest in the telecommunication industry. Over the last few
years, analog radio systems are being replaced by digital radio systems for various radio
applications in military, civilian and commercial spaces. In addition to this, programmable
hardware modules are increasingly being used in digital radio systems at different functional levels.
SDR technology aims to take advantage of these programmable hardware modules to build an openarchitecture
based radio system software. SDR technology facilitates implementation of some of the
functional modules in a radio system such as modulation/demodulation, signal generation, coding
and link-layer protocols in software.
INTRODUCTION
A certain convergence occurs when multiple technologies align in time to make possible those
things that once were only dreamed. The explosive growth of the Internet starting in 1994 was one
of those events. While the Internet had existed for many years in government and education prior to
that, its popularity had never crossed over into the general populace because of its slow speed and
arcane interface. The development of the Web browser, the rapidly accelerating power and
availability of the PC, and the availability of inexpensive and increasingly speedy modems brought
about the Internet convergence. Suddenly, it all came together so that the Internet and the
worldwide Web joined the everyday lexicon of our society.
MOTIVATION
SDR has generated tremendous interest in the wireless communication industry for the wideranging
economic and deployment benefits it offers. Following are some of the problems faced by the
wireless communication industry due to implementation of wireless networking infrastructure
equipment and terminals completely in hardware:
HISTORY OF SOFTWARE RADIOs [13]
The term 'software radio' was coined in 1984 by a team at the Garland Texas Division of E-Systems
Inc. (now Raytheon). A classified, yet fairly well known, 'Software Radio Proof-of-Concept'
laboratory was developed at E-Systems that popularized Software Radio within various government
agencies. This 1984 Software Radio was a digital base band receiver that provided programmable
interference cancellation and demodulation for broadband signals, typically with thousands of
adaptive filter taps, using multiple array processors accessing shared memory.
Communications Security
Increasingly, state and local law enforcement agencies recognize the need to have secure
communications because clear communications can be easily compromised. Most federal law
enforcement agencies already have encryption capabilities and are in the process of transitioning to
Project 25-compliant encryption schemes.
Conclusion
Current market drivers such as future-proof equipment, seamless integration of new services,multimode
equipment and over-the-air feature insertion in commercial wireless networking industry have
resulted in widespread interest in SDR technology. The technology can be used to implement
wireless network infrastructure equipment as well as wireless handsets, PDAs,wireless modems and
other end-user devices.