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Cgordini 14:41, October 22, 2010 (UTC)802.11 and SoraEdit

Sora uses C programming, as before stated, to transmit I/Q array samples out of the Sora RCB, into a WARP or USRP RF frontend.
OSI Model

OSI Model (Wikipedia)



These I/Q samples have to be created first, and coded with information pertaining to IEEE 802.11.


Microsoft, as of Friday, May 28th, released source code for 802.11b Soft-Wifi, which includes 802.11b based structures such as CCK, BPSK, and QPSK modulation (each with their own header, found in the \bb\11b\ subdirectory of a SoftWifi sample code install (found at http://research.microsoft.com/en-us/downloads/fe7833ba-afaf-4d3c-b966-ac211a387d2b/default.aspx).

It should be noted that this directory structure means "baseband - 802.11b"; radio frequency and signal concepts often intertwine with C programming due to Sora's design.


It should also be noted that none of this code is compiled upon install; this all requires compilation from either the Sora compiler included in this kit, or the WDK compiler; both the Sora SDK and the WDK are required to install and use this sample code.


This sample code comes with four specific subdirectories:

/bb/ -- Baseband code

/driver/ -- Code for an 802.11b Microsoft Windows XP driver; in combination with Sora's RCB and a RF frontend makes for a working NIC.

/inc/ -- include statements (various headers) for use with all code neccesary. Notable inclusions are sdr_mac.h, sdr_ll.h and sdr_phy.h, all based on the OSI Model.

/util/ -- Code neccesary for the 802.11b utility to function.


I have begun to document all this code, and as of 06/02/10 finished up documenting the driver section, sans the executable. Contact me for a copy of this documentation.

Sora Links
Wiki Pages References


As mentioned on the Sora Wiki main page, our team has finished an implementation based on this SoftWifi 11b code, that includes RTS/CTS and a backoff timer. It can be found at:

http://cid-0c55f9bb8697aa22.office.live.com/self.aspx/.Documents/802.11b%20RTS%20CTS%20Installer.exe

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