Journal ArticleDOI
Spread Spectrum Acquisition and Tracking Performance for Shuttle Communication Links
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TLDR
The spread spectrum acquisition and tracking performance for the Shuttle S -band and Ku -band communication links are analyzed and compared to test results.Abstract:
The spread spectrum acquisition and tracking performance for the Shuttle S -band and Ku -band communication links are analyzed and compared to test results. The S -band link requirements are more severe than those of the Ku -band links, hence, different despreader designs were developed for the two systems. The S -band despreader acquires pseudonoise code lock by examining all possible code phases in half chip steps while the Ku -band despreader acquires pseudonoise code lock by continuously sweeping a tau-jitter loop. Both despreaders employ a tau-jitter loop for code tracking. The code tracking performance is computed for the tau-jitter loop and compared to that of the more complex delay lock loop.read more
Citations
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References
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Journal ArticleDOI
Acquisition Time Performance of PN Spread-Spectrum Systems
J. Holmes,Chang Chen +1 more
TL;DR: The mean and variance of the time to acquire for single dwell time PN-type spread-spectrum systems for Markov chain model and the effects of Doppler and other imperfections of the original model are discussed.
Journal ArticleDOI
Acquisition of Pseudonoise Signals by Sequential Estimation
TL;DR: Performance of the sequential estimation system is compared with the stepping correlation system, and significant improvement of acquisition time is shown for signal-to-noise ratios down to approximately -15 dB.
Journal ArticleDOI
Noncoherent Pseudonoise Code Tracking Performance of Spread Spectrum Receivers
TL;DR: The bandlimiting effects of the bandpass arm filters are considered and it is shown that for a fixed data rate and data signal-to-noise ratio, there exists an optimum filter bandwidth in the sense of minimizing the loop's tracking jitter.
Journal ArticleDOI
Serial Synchronization of Pseudonoise Systems
TL;DR: The probabilities of false alarm and false dismissal during synchronization for coherent and incoherent detection are computed and the results are dependent on carrier power, noise per unit bandwidth, and search rate.
Journal ArticleDOI
Analysis of a Dithering Loop for PN Code Tracking
TL;DR: In this article, the tracking performance of a dithering loop in the presence of white Gaussian noise is analyzed and compared to the performance of delay-lock loops with the same model.
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