Changes

A project to explore the creation of and applications for Software Defined Radios, which allow you to receive any radio frequency and interpret the data using software -- basically a universal radio device

A project to explore the creation of and applications for Software Defined Radios, which allow you to receive any radio frequency and interpret the data using software -- basically a universal radio device

==Introduction==

== Introduction ==

Most Radio Frequency (RF) devices utilize specialized hardware circuits (RF frontends) to filter out unwanted frequencies & noise, and to decode & interpret the signal. Different frequencies (e.g 915MHz, 2.4GHz) require different types of antennas and circuits for optimal efficiency. Different modulation techniques (e.g. AM, FM, CDMA) require different algorithms (implemented in hardware or software) to decode.<br>

Most Radio Frequency (RF) devices utilize specialized hardware circuits (RF frontends) to filter out unwanted frequencies & noise, and to decode & interpret the signal. Different frequencies (e.g 915MHz, 2.4GHz) require different types of antennas and circuits for optimal efficiency. Different modulation techniques (e.g. AM, FM, CDMA) require different algorithms (implemented in hardware or software) to decode.<br />

A Software Defined Radio (SDR) is an RF device that can be programmed to receive any frequency within a large range. This is usually accomplished by using multiple antennas connected to multiple RF frontends, connected to a very sensitive digital capture device that is controlled by a computer or FPGA. Software on the computer can demodulate the signal and follow the Media Access Control (MAC) protocol (if any) using programmed algorithms.

A Software Defined Radio (SDR) is an RF device that can be programmed to receive any frequency within a large range. This is usually accomplished by using multiple antennas connected to multiple RF frontends, connected to a very sensitive digital capture device that is controlled by a computer or FPGA. Software on the computer can demodulate the signal and follow the Media Access Control (MAC) protocol (if any) using programmed algorithms.

==Implementation & Scratchpad==

== Implementation & Scratchpad ==

This section lists work-in-progress notes regarding implementation of SDRs<br><br>

This section lists work-in-progress notes regarding implementation of SDRs<br /><br />

'''RF Frontend Options'''

'''RF Frontend Options'''

* A cable modem tuner module can capture 6.5MHz (IF bandwidth; limited by internal SAW filter?) centered at any frequency in the range 50MHz-890MHz (RF bandwidth)

* A cable modem tuner module can capture 6.5MHz (IF bandwidth; limited by internal SAW filter?) centered at any frequency in the range 50MHz-890MHz (RF bandwidth)

==Part Research==

== Part Research ==

No research done yet, just collected some mentioned hardware from some links as an example<br><br>

No research done yet, just collected some mentioned hardware from some links as an example<br /><br />

'''Tuners'''

'''Tuners'''

  WiNRADIO WR-G526e (20-3000Mhz) tuner/down-converter; $6000 used somewhere

  WiNRADIO WR-G526e (20-3000Mhz) tuner/down-converter; $6000 used somewhere

==Links==

== Links ==

'''General Info'''

'''General Info'''

''' SDR Groups, Blogs, Posts, etc'''

''' SDR Groups, Blogs, Posts, etc'''

* http://www.tapr.org/<br>

* http://www.tapr.org/<br />

* http://laforge.gnumonks.org/weblog/linux/gnuradio/<br>

* http://laforge.gnumonks.org/weblog/linux/gnuradio/<br />

* http://slashdot.org/~gnuradio/comments<br>

* http://slashdot.org/~gnuradio/comments<br />

'''Software'''<br>

'''Software'''<br />

* Linux data acquisition tools: http://www.comedi.org/index.html<br>

* Linux data acquisition tools: http://www.comedi.org/index.html<br />

'''Related Topics'''

'''Related Topics'''

* GSM Scanner Project: http://wiki.thc.org/gsm?action=show&redirect=GsmScannerProject#head-edc7452502386402af17c04400d820609348f132

* GSM Scanner Project: http://wiki.thc.org/gsm?action=show&redirect=GsmScannerProject#head-edc7452502386402af17c04400d820609348f132