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- W2560885901 abstract "Array antennas and digital electronics have improvedconsiderably in performance, size, weight, powerconsumption, and affordability. GPS applications havebenefited from progresses in adaptive spatial processingincluding jammer nulling, signal enhancement, andmultipath rejection among others. Along this line ofdevelopment with array antennas, this paper presents adigital beamforming monopulse technique for attitudedetermination with GPS signals.GPS attitude determination so far has predominantlyrelied upon the interferometric technique. As such, twoindependent baselines are required for three-axis attitudedetermination. For a given level of phase quality, theangular measurement accuracy of the incident signal’sdirection relative to the baseline is proportional to thebaseline length and particularly depends upon the abilityto reliably resolve phase integer ambiguity and to timelyrepair cycle slips.In contrast, the monopulse technique presented in thispaper has originated from surveillance and tracking radar.For each angular dimension, a pair of sum and differencebeams are formed digitally from individual array elementoutputs. The ratio of the sum beam over the differencebeam provides an angular offset measurement of theincident wavefront off the array boresight.This paper describes the concept of a GPS monopulseattitude determination system, alternative implementationschemes, a digital beamforming monopulse angularmeasurement algorithm, and an integrated attitudeestimation algorithm. Computer simulation results arealso presented to illustrate the system functionality andnoise and dynamic performance." @default.
- W2560885901 created "2017-01-06" @default.
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- W2560885901 date "2001-09-14" @default.
- W2560885901 modified "2023-09-27" @default.
- W2560885901 title "Digital Beamforming Monopulse For GPS Attitude Determination" @default.
- W2560885901 hasPublicationYear "2001" @default.
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