Accession Number : AD1030418


Title :   Maximum Interconnectedness and Availability for Directional Airborne Range Extension Networks


Descriptive Note : Journal Article


Corporate Author : MASSACHUSETTS INST OF TECH LEXINGTON LEXINGTON United States


Personal Author(s) : Shake,Thomas H ; Amin,Rahul


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/1030418.pdf


Report Date : 29 Aug 2016


Pagination or Media Count : 28


Abstract : Extending the range of tactical military networks that are confined to a local geographic area by using small aircraft to relay traffic to geographically distant areas is a topic of interest in military network technology development. Highly directional antennas, incorporated into avionics pods that attach modularly to an aircraft fuselage, can provide long-range, interference-resistant communications at high data rates for range extension. Antenna elements in such designs typically have limited field-of-view (FoV), potentially making interconnectedness among communication nodes dependent on the geomWith the advancement of high throughput and high resolution volumetric brain imaging, there is an unmet need to trace dense neuron fibers and study long-range neuron connectivity. An initial pipeline is described for processing cellular-level neuronal fiber data acquired by a new super resolution imaging method, called Magnified Analysis of the Proteome (MAP). First, a multiscale vessel enhancement filter is applied to segment fibers of different diameters. Morphological operations are next employed to compute the centerlines of the fibers, from which a 3D connectivity map is computed. Applying this approach to an initial data set yielded 2% equal error rate for segmentation and 92% accuracy for end-to-end fiber tracing (22 out of 24 hand traced fibers). Future work calls for scaling up the algorithm to process much larger brain datasets (TB+) and performinetry of the physical network. This paper examines generic sectorized and non-sectorized pod antenna designs and compares the interconnectedness and link availability of these designs in representative range extension network layouts. Mathematical criteria for 100% link availability are presented, and quantitative tradeoffs between link availability and node interconnectedness are derived as functions of the number of antenna beams per pod, the number of beams per sector, and the number of surface users to be supported.


Descriptors :   wireless communications , network topology , antenna radiation patterns , directional antennas , flight paths , wireless networks , Range (Distance) , algorithms


Subject Categories : Target Direction, Range and Position Finding
      Computer Systems


Distribution Statement : APPROVED FOR PUBLIC RELEASE