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  • 1
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    Hardware simulation of shuttle Ku-band antenna acquisition, volume 5 (1977)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: For abstract, see N78-17252.
    Keywords: COMMUNICATIONS AND RADAR
    Type: NASA-CR-151614 , TR-7810-0675-VOL-5
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Ku-band antenna acquisition and tracking performance study, volume 4 (1977)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The results pertaining to the tradeoff analysis and performance of the Ku-band shuttle antenna pointing and signal acquisition system are presented. The square, hexagonal and spiral antenna trajectories were investigated assuming the TDRS postulated uncertainty region and a flexible statistical model for the location of the TDRS within the uncertainty volume. The scanning trajectories, shuttle/TDRS signal parameters and dynamics, and three signal acquisition algorithms were integrated into a hardware simulation. The hardware simulation is quite flexible in that it allows for the evaluation of signal acquisition performance for an arbitrary (programmable) antenna pattern, a large range of C/N sub O's, various TDRS/shuttle a priori uncertainty distributions, and three distinct signal search algorithms.
    Keywords: COMMUNICATIONS AND RADAR
    Type: NASA-CR-151613 , TR-7810-0675-VOL-4
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Evaluation of pulsed RFI effects on digital satellite repeaters (1980)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: This paper presents an analytical approach for assessing the effect of pulsed RFI on the error probability of a coherent phase-shift keyed signal through a nonlinear satellite repeater. The RFI is assumed to affect the uplink channel and to consist of CW pulses with random power levels and arriving randomly in time with a Poisson distribution. A model to approximate the effect of intermodulation products is introduced and the error probability conditioned on the output of the satellite repeater is computed. The classical moment technique is then used as an efficient method of averaging the conditional error probability over the numerous random parameters associated with the uplink signal.
    Keywords: COMMUNICATIONS AND RADAR
    Type: In: NTC ''80; National Telecommunications Conference; Nov 30, 1980 - Dec 04, 1980; Houston, TX
    Format: text
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    NASA TECHNICAL REPORTS
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