Changes between Version 38 and Version 39 of Hardware/bDomains/aGrid


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Timestamp:
May 17, 2016, 7:51:40 PM (9 years ago)
Author:
jkol
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  • Hardware/bDomains/aGrid

    v38 v39  
    22[[TOC(Hardware,Hardware/bDomains*, depth=5)]]
    33
    4 Block diagram of the ORBIT Grid domain is shown in Figure 1. Main components of this domain are:
    5   * Grid nodes: 20 x 20 machines arranged in the grid configuratoin (20 rows with 20 nodes each) with spacing of 3 feet.
     4Block diagram of the ORBIT Grid domain is shown in Figure 1. The main components of this domain are:
     5  * Grid nodes: 20 x 20 machines arranged in a grid configuration (20 rows with 20 nodes each) with spacing of 3 feet.
    66  * Massive-MIMO racks: four mini-racks of SDRs with 32 antennas each
    77  * Servers: number of servers of varying capabilities
    88  * Virtual machines: number of on-demand VM instances
    9   * Noise injection subsystem:
    10   * [wiki:Hardware/bDomains/aGrid#SupportInfrastructure Support infrastructure]: Ethernet switches, GPS/RF Reference distribution, console and other support hardware
     9  * Noise injection subsystem: for injecting arbitrary signals to create different topologies
     10  * [wiki:Hardware/bDomains/aGrid#SupportInfrastructure Support infrastructure]: SDN capable ethernet switches, GPS/RF reference distribution, console and other support hardware
    1111
    1212 || [[Image(ORBITGridBD.jpg, 400px)]] ||
    … …  
    1414
    1515==== Massive-MIMO mini-racks ====
    16 
     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. 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)]] ||
    … …  
    2121==== Servers ====
    2222
    23 Number of hihger-core count/larger memory servers some of which are equipped with [wiki:Hardware/fDevices/gCUDA GPUs].
     23A number of high CPU core count/large memory servers are available for running "backend" software. Some are equipped with [wiki:Hardware/fDevices/gCUDA GPUs] for increased computational performance.
    2424 
    2525==== Noise Injection subsystem ====
    2626
    27 The Centralized Arbitrary Waveform Injection Subsystem (CAWIS) consists of arbitrary waveform generator (Agilent ESG) connected through distribution network to four multi-band antennas located in the four corners of the grid. The distribution network enables control over the attenuation of the individual antenna feed. Using CAWIS, users can inject (among other types of waveforms) AWGN signals into the main ORBIT grid and thus create different topologies. 
     27The Centralized Arbitrary Waveform Injection Subsystem (CAWIS) consists of arbitrary waveform generator (Agilent ESG) connected through a distribution network to four multi-band antennas located in the four corners of the grid. The distribution network enables control over the attenuation of the individual antenna feed. Using CAWIS, users can inject (among other types of waveforms) AWGN signals into the main ORBIT grid and thus create different topologies. 
    2828
    2929
    … …  
    3434 ||  a.) Block Diagram  ||  b.) Noise injection antenna positions  ||
    3535
    36 As most of the Orbit services, CAWIS is a web-based service accessible from '''main grid console''' through url:  '''http://instrument1.orbit-lab.org:5054/interference'''. As with other aggregate managers, accessing this url without any other arguments will show it's usage page.
     36As most of the Orbit services, CAWIS is a web-based service accessible from the '''main grid console''' through url:  '''http://instrument1.orbit-lab.org:5054/interference'''. As with other aggregate managers, accessing this url without any other arguments will show it's usage reference page.
    3737
    3838==== Support Infrastructure ====