Changes between Version 40 and Version 41 of Hardware/bDomains/aGrid


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Timestamp:
May 17, 2016, 8:41:17 PM (8 years ago)
Author:
jkol
Comment:

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  • Hardware/bDomains/aGrid

    v40 v41  
    1414
    1515==== Massive-MIMO mini-racks ====
    16 There are four mini-racks located in the corners of the Grid specifically for massive-MIMO experiments. Each rack contains 8 Ettus USRP X310 software defined radios outfitted with two UBX 160 radio daughterboards each. PPS and 10MHz synchronization signals are distributed among the USRPs in each rack via an Octoclock based timing distribution system. Equal length cables are used to ensure minimum timing deviation within and between the racks allowing for all USRPs across the four racks to by synchronized. Additional hardware is present in each rack to allow for power-cycling and "imaging" of the USRPs in a similar manner to standard nodes.
     16There are four mini-racks located in the corners of the Grid specifically for massive-MIMO experiments. Each rack contains 8 Ettus USRP X310 software defined radios outfitted with two UBX 160 radio daughterboards each. Unlike USRPs in the main 20x20 Grid which are direct attached to individual nodes, each USRP inthe mini-racks is connected via 10G ethernet to the rest of the Grid domain. PPS and 10MHz synchronization signals are distributed among the USRPs in each rack via an Octoclock based timing distribution system. Equal length cables are used to ensure minimum timing deviation within and between the racks allowing for all USRPs across the four racks to by synchronized. Additional hardware is present in each rack to allow for power-cycling and "imaging" of the USRPs in a similar manner to standard nodes.
    1717
    1818 || [[Image(Massive-MIMO.jpg, 400px)]] ||