Renewed interest in space exploration and cislunar situational awareness demands accurate ranging algorithms to enable navigation solutions for a multitude of spacecraft, rovers, and human explorers on the Moon and even on Mars, in the near future. Current state-of-the-art in ground-based ranging accuracy is on the order of 30 cm; however, complicated equipment calibration and significant post-processing is required to achieve this level of ranging accuracy. This article examines ad-hoc approaches that achieve near-optimum real-time ranging performance with reduced complexity by utilizing a DPLL (digital phase-locked loop) to track the phase of the residual carrier for both direct and subcarrier modulated PN sequences, and a DCL (digital Costas loop) to obtain independent estimates of carrier phase, and optimal combinations of these implementations to achieve near-optimum real-time performance with reduced computational complexity.


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    Title :

    Near-Optimum Real-Time Range Estimation Algorithms for Proximity Links


    Contributors:


    Publication date :

    2021-03-06


    Size :

    1698903 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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