Changes between Version 19 and Version 20 of OFDMReferenceDesign


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Timestamp:
Mar 30, 2007, 11:33:53 AM (17 years ago)
Author:
cjcamp
Comment:

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  • OFDMReferenceDesign

    v19 v20  
    33[[Image(OFDMReferenceDesign/Files:esd_warning.jpg)]]
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    5 By default, this project creates a custom wireless ethernet link between two computers, each attached to a WARP kit (FPGA board + clock board + radio board).  Each computer is unaware that a wireless link is present, and simply communicates with its neighbor using a standard wired connection.  The WARP boards are "inserted" between the two computers to provide a transparent wireless bridge.  The following diagram gives a simple overview of the configuration used for this example.
     5By default, this project creates a custom wireless Ethernet link between two computers, each attached to a WARP kit (FPGA board + clock board + radio board).  Each computer is unaware that a wireless link is present, and simply communicates with its neighbor using a standard wired connection.  The WARP boards are "inserted" between the two computers to provide a transparent wireless bridge.  The following diagram gives a simple overview of the configuration used for this example.
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    77[[Image(OFDMReferenceDesign/Files:overview_01a.jpg)]]
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    9 If it not possible to obtain two computers, the WARP link may be inserted into the wired connection between a single computer and a DHCP server.  Typically, the WARP boards will be inserted between the computer and an RJ45 jack in a laboratory or office.  This configuration, while appearing to be a simpler one, may be more difficult to troubleshoot in the event that problems arise.
     9If it is impractical to obtain two local computers, the WARP link may be inserted into the wired connection between a single computer and a DHCP server.  Typically, the WARP boards will be inserted between the computer and an RJ45 jack in a laboratory or office.  This configuration, while appearing to be a simpler one, may be more difficult to troubleshoot in the event that problems arise.
    1010
    1111The WARP kits that implement the wireless link treat Ethernet packets ONLY as payload, and do not perform ANY IP processing.
    1212
    13 == Initial Setup ==
     13== Initial Hardware Setup ==
    1414
    1515The following image illustrates a complete set of hardware used to implement this example.  IF YOU HAVE NOT ALREADY DONE SO, NOW WOULD BE A GOOD TIME TO WORK THROUGH THE LABORATORY EXERCISE titled [http://warp.rice.edu/trac/wiki/Exercises/FPGABoardIntro INTRODUCTION TO THE WARP FPGA BOARD].  This introductory exercise provides a solid introduction to using the boards, including detailed illustrations of correct cable connections.
    … …  
    2828   - a wired Ethernet connection between each WARP kit and one of the local computers.
    2929
    30 The following images illustrate each of these connections.  EXERCISE EXTREME CAUTION WHEN PLUGING A CABLE INTO THE CLOCK BOARD, AS THE INTERFACE BETWEEN IT AND THE FPGA BOARD IS EXTREMELY DELICATE!  THE CLOCK BOARD SHOULD BE GRASPED FIRMLY BE THE EDGES TO PREVENT ANY ROCKING MOTION WHEN INSTALLING THE MMCX-TO-MMCX CABLE.
     30The following images illustrate several of these connections.  EXERCISE EXTREME CAUTION WHEN PLUGING A CABLE INTO THE CLOCK BOARD, AS THE INTERFACE BETWEEN IT AND THE FPGA BOARD IS EXTREMELY DELICATE!  THE CLOCK BOARD SHOULD BE GRASPED FIRMLY BE THE EDGES TO PREVENT ANY ROCKING MOTION WHEN INSTALLING THE MMCX-TO-MMCX CABLE.
    3131
    3232[[Image(OFDMReferenceDesign/Files:setup_02a.jpg)]]
    … …  
    3636[[Image(OFDMReferenceDesign/Files:setup_04a.jpg)]]
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    38 Please note that you may have additional connections to the WARP boards, beyond those identiofied above.  If, for example, you have recently worked through the exercise titled [http://warp.rice.edu/trac/wiki/Exercises/FPGABoardIntro INTRODUCTION TO THE WARP FPGA BOARD], then you may have a serial cable and a USB cable connected between your WARP boards and their corresponding computers.
     38Please note that you may have additional connections to the WARP boards, beyond those identified above.  If, for example, you have recently worked through the exercise titled [http://warp.rice.edu/trac/wiki/Exercises/FPGABoardIntro INTRODUCTION TO THE WARP FPGA BOARD], then you may have a serial cable and a USB cable connected between your WARP boards and their corresponding computers.
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    4040The user DIP switches on one WARP kit should be set to the binary value 0000.  The user DIP switches on the other WARP kit should be set to the value 0001.
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    4747
    4848[[Image(OFDMReferenceDesign/Files:setup_06a.jpg)]]
     49
     50== Initial Computer Setup (Two Computers) ==
     51
     52Since two local computers will be connected to each other, there will not be a DHCP server available to supply IP addresses to each of them.  In this scenario, the computers must have their IP addresses hard-coded.  Furthermore, the two computers must reside within the same subnet.  The following addresses and subnet masks are just one example of acceptable settings for this demo:
     53
     54   - COMPUTER 1 IP ADDRESS = 192.168.0.16,
     55   - COMPUTER 2 IP ADDRESS = 192.168.0.17,
     56
     57   - COMPUTER 1 SUBNET MASK = 255.255.255.0,
     58   - COMPUTER 2 SUBNET MASK = 255.255.255.0.
     59
     60== Initial Computer Setup (One Computer) ==
     61
     62In the one-computer configuration, a single computer is connected to a DHCP server through the WARP wireless link.  The computer should be configured to obtain its IP address automatically.
     63
     64== Running the Demo ==
     65
     66Switch the Master Power Switch for each FPGA board to the ON state.
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