software defined radio full report
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24-01-2010, 02:34 PM



.pdf   Software_Defined_Radio-report.pdf (Size: 178.17 KB / Downloads: 1,051)

.ppt   Presentationo fSoftware DefinedRadio.ppt (Size: 1.04 MB / Downloads: 1,064)
Whatâ„¢s the Software Defined Radio


Software Defined Radio (SDR) refers to the technology wherein software

modules running on a generic hardware platform consisting of DSPs and

general purpose microprocessors are used to implement radio functions

such as generation of transmitted signal (modulation) at transmitter

and tuning/detection of received radio signal (demodulation) at

receiver.¦a radio that includes a transmitter in
which the operationg parameters of the
transmitter, including the frequency range,
modulation type or maximum radiated or
conducted output power can be altered by
making a change in software without
making any hardware changes
-FCC definition
FCC, federal communications commission



2. Motivation of SDR


Commercial wireless communication industry is currently facing problems

due to constant evolution of link-layer protocol standards (2.5G, 3G,

and 4G)
existence of incompatible wireless network technologies in different

countries inhibiting deployment of global roaming facilities
problems in rolling-out new services/features due to wide-spread

presence of legacy subscriber handsets.
 Continuous transition from analog to digital
 software defines waveforms
 analog signal processing is replaced with DSP
 Evolving technologies
 NMT >> GSM >> UMTS >> ???
 infrastructure upgrades
 Multimode devices
 4G devices
 legacy devices
 same device for different networks
 Reusable devices
devices can be upgraded
software update
 Increasing DSP capabilities
computational power increases
power consumption decreases
 Money
Concept
 Software replaces hardware as much as
possible
 reduces costs
 increases versability
 Equipment/infrastructure â„¢recyclingâ„¢
 by software updates
 Anything is possible
 within the current limits

Applications


 Military
 real-time flexibility
 secure
 Commercial
 international connectivity
 Civilian
 portable command for crisis management
 Bluetooth, WLAN, GPS, Radar, WCDMA, GPRS, GSM,
PCS, DECT, AM, FM, etc.


Features


 Reconfigurability
co-existence of multiple software modules
implementing different standards
dynamic configuration both in terminals and in
infrastructure equipment
future-proof, multi-service, multi-mode, multiband,
multi-standard terminals and
infrastructure equipment
 Ubiquitous Connectivity
if the terminal is incompatible with the network
technology, an appropriate software module is
installed (over-the-air)
the infrastructure equipment can adjust to the
legacy terminals
 Interoperability
SDR facilitates implementation of open
architecture radio systems
End-users can use third-party applications
seamlessly
SDR, software defined radio

Programmability

 Hardware radio
no software changes
 Software controlled radio
in PDR, BB operations and link layer
protocols are implemented in software.
 Software defined radio
SDR system is one in which the BB
processing as well as DDC/DUC modules are
programmable. PDR, programmable digital radio
DDC/DUC, digital BB, baseband down/up converter
 Ideal software radio
programmability is extended to the RF section
 Ultimate software radio
in a single chip, no external antenna and no
restrictions on operating frequency
intended for comparison purposes only

Typical Components of SDR


Analog Radio Frequency (RF) receiver/transmitter in the 200 MHz to

multi-gigahertz range.
High-speed A/D and D/A converters to digitize a wide portion of the

spectrum at 25 to 210 Msamples/sec.
High-speed front-end signal processing including Digital Down

Conversion (DDC) consisting of one or more chains of mix + filter +

decimate or up conversion.
Protocol-specific processing such as Wideband Code Division Multiple

Access (W-CDMA) or OFDM, including spreading/de-spreading, frequency-

hop-and chip-rate recovery, code/decode functions, including

modulation/demodulation, carrier and symbol rate recovery, and channel

interleaving/de-interleaving.
Data communications interface with carrier networks and backbone for

data I/O and command-and-control processing, usually handled by general

purpose ARM or PowerPC processors and Real-Time Operating System
(RTOS).
Use Search at http://topicideas.net/search.php wisely To Get Information About Project Topic and Seminar ideas with report/source code along pdf and ppt presenaion
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gspavi
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#2
13-03-2010, 11:34 AM

how to download the full report ... please help..
I want full report and ppt of software defined radio... please help me out...
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seminar-avatar
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#3
18-03-2010, 07:24 PM

Hey, to download the pdf and ppt of the above report,
just click on the links given at the beginning of the project and implimentation and the downloading will start in a new window.
Use Search at http://topicideas.net/search.php wisely To Get Information About Project Topic and Seminar ideas with report/source code along pdf and ppt presenaion
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seminar presentation
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02-05-2010, 12:07 AM


.pdf   Software_Defined_Radio.pdf (Size: 178.17 KB / Downloads: 164)

what is software defined radio?
a radio that includes a transmitter in which the operationg parameters of the transmitter, including the frequency range, modulation type or maximum radiated or conducted output power can be altered by making a change in software without making any hardware changes
Use Search at http://topicideas.net/search.php wisely To Get Information About Project Topic and Seminar ideas with report/source code along pdf and ppt presenaion
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projectsofme
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#5
28-09-2010, 03:38 PM

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 open-architecture 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. This helps in building reconfigurable software radio systems where dynamic selection of parameters for each of the above-mentioned functional modules is possible. A complete hardware based radio system has limited utility since parameters for each of the functional modules are fixed. A radio system built using SDR technology extends the utility of the system for a wide range of applications that use different link-layer protocols and modulation/demodulation techniques. Commercial wireless communication industry is currently facing problems due to constant evolution of link-layer protocol standards (2.5G, 3G, and 4G), existence of incompatible wireless network technologies in different countries inhibiting deployment of global roaming facilities and problems in rolling-out new services/features due to wide-spread presence of legacy subscriber handsets. SDR technology promises to solve these problems by implementing the radio functionality as software modules running on a generic hardware platform. Further, multiple software modules implementing different standards can be present in the radio system. The system can take up different personalities depending on the software module being used. Also, the software modules that implement new services/features can be downloaded over-the-air onto the handsets. This kind of flexibility offered by SDR systems helps in dealing with problems due to differing standards and issues related to deployment of new services/features.
Introduction
Software-Defined Radio (SDR) Forum [sdrforum.org] defines SDR technology as "radios that provide software control of a variety of modulation techniques, wide-band or narrow-band operation, communications security functions (such as hopping), and waveform requirements of current & evolving standards over a broad frequency range.” In a nutshell, Software-Defined Radio (SDR) refers to the technology wherein software modules running on a generic hardware platform consisting of DSPs and general purpose microprocessors are used to implement radio functions such as generation of transmitted signal (modulation) at transmitter and tuning/detection of received radio signal (demodulation) at receiver. SDR technology can be used to implement military, commercial and civilian radio applications. A wide range of radio applications like Bluetooth, WLAN, GPS, Radar, WCDMA, GPRS, etc. can be implemented using SDR technology. This whitepaper provides an overview of generic SDR features and its architecture with a special focus on the benefits it offers in commercial wireless communication domain.

For more information about this article,please follow the link:
broadcastpaperswhitepapers/WiproSDRadio.pdf
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sukesh_6548018@yahoo.co.in
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#6
08-01-2011, 07:21 PM

HI ..pLZ GO THROGH THE ATTACHMENT
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gopishrine1
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14-07-2011, 09:23 PM

can you please upload the full details of coding and everything you did in this project and implimentation? I like to do this project and implimentation as my final year project and implimentation
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sangeetha25
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28-08-2011, 01:58 PM

sir,
will you please send me the full report of software defined radio? i need it for taking seminar and presentation.
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29-08-2011, 10:18 AM

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30-09-2011, 10:02 PM

pls send software defined radio full report
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01-10-2011, 09:42 AM

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ajilisa
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22-11-2011, 04:36 PM

pls send me the full report
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24-07-2012, 01:24 PM

A software-defined radio system


.doc   A software-defined radio system.doc (Size: 43 KB / Downloads: 16)
Operating principles

The ideal receiver scheme would be to attach an analog-to-digital converter to an antenna. A digital signal processor would read the converter, and then its software would transform the stream of data from the converter to any other form the application requires.
An ideal transmitter would be similar. A digital signal processor would generate a stream of numbers. These would be sent to a digital-to-analog converter connected to a radio antenna.
The ideal scheme is not completely realizable due to the actual limits of the technology. The main problem in both directions is the difficulty of conversion between the digital and the analog domains at a high enough rate and a high enough accuracy at the same time, and without relying upon physical processes like interference and electromagnetic resonance for assistance.

Receiver architecture

Most receivers use a variable-frequency oscillator, mixer, and filter to tune the desired signal to a common intermediate frequency or baseband, where it is then sampled by the analog-to-digital converter. However, in some applications it is not necessary to tune the signal to an intermediate frequency and the radio frequency signal is directly sampled by the analog-to-digital converter (after amplification).
Real analog-to-digital converters lack the dynamic range to pick up sub-microvolt, nanowatt-power radio signals. Therefore a low-noise amplifier must precede the conversion step and this device introduces its own problems. For example, if spurious signals are present (which is typical), these compete with the desired signals within the amplifier's dynamic range. They may introduce distortion in the desired signals, or may block them completely. The standard solution is to put band-pass filters between the antenna and the amplifier, but these reduce the radio's flexibility - which some see as the whole point of a software radio. Real software radios often have two or three analog channel filters with different bandwidths that are switched in and out.

History

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 baseband 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.[4]
Perhaps the first software-defined radio transceiver was designed and implemented by Peter Hoeher and Helmuth Lang at the German Aerospace Research Establishment (DLR, formerly DFVLR) in Oberpfaffenhofen, Germany, in 1988.[5] Both transmitter and receiver of an adaptive digital satellite modem were implemented according to the principles of software-defined radio, and a flexible hardware periphery was proposed.

Amateur or home use

A typical amateur software radio uses a direct conversion receiver. Unlike direct conversion receivers of the more distant past, the mixer technologies used are based on the quadrature sampling detector and the quadrature sampling exciter.[9][10][11][12]

The receiver performance of this line of SDRs is directly related to the dynamic range of the analog-to-digital converters (ADCs) utilized.[13] Radio frequency signals are down converted to the audio frequency band, which is sampled by a high performance audio frequency ADC. First generation SDRs used a PC sound card to provide ADC functionality. The newer software defined radios use embedded high performance ADCs that provide higher dynamic range and are more resistant to noise and RF interference.
A fast PC performs the digital signal processing (DSP) operations using software specific for the radio hardware. Several software radio efforts use the open source SDR library DttSP.[14]
The SDR software performs all of the demodulation, filtering (both radio frequency and audio frequency), signal enhancement (equalization and binaural presentation). Uses include every common amateur modulation: morse code, single sideband modulation, frequency modulation, amplitude modulation, and a variety of digital modes such as radioteletype, slow-scan television, and packet radio.[15] Amateurs also experiment with new modulation methods: for instance, the DREAM open-source project and implimentation decodes the COFDM technique used by Digital Radio Mondiale.


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