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Breadboard Signal Processor for Arraying DSN AntennasA recently developed breadboard version of an advanced signal processor for arraying many antennas in NASA s Deep Space Network (DSN) can accept inputs in a 500-MHz-wide frequency band from six antennas. The next breadboard version is expected to accept inputs from 16 antennas, and a following developed version is expected to be designed according to an architecture that will be scalable to accept inputs from as many as 400 antennas. These and similar signal processors could also be used for combining multiple wide-band signals in non-DSN applications, including very-long-baseline interferometry and telecommunications. This signal processor performs functions of a wide-band FX correlator and a beam-forming signal combiner. [The term "FX" signifies that the digital samples of two given signals are fast Fourier transformed (F), then the fast Fourier transforms of the two signals are multiplied (X) prior to accumulation.] In this processor, the signals from the various antennas are broken up into channels in the frequency domain (see figure). In each frequency channel, the data from each antenna are correlated against the data from each other antenna; this is done for all antenna baselines (that is, for all antenna pairs). The results of the correlations are used to obtain calibration data to align the antenna signals in both phase and delay. Data from the various antenna frequency channels are also combined and calibration corrections are applied. The frequency-domain data thus combined are then synthesized back to the time domain for passing on to a telemetry receiver
Document ID
20090020491
Acquisition Source
Jet Propulsion Laboratory
Document Type
Other - NASA Tech Brief
External Source(s)
http://www.techbriefs.com/component/content/article/2648
Authors
Jongeling, Andre (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Sigman, Elliott (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Chandra, Kumar (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Trinh, Joseph (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Soriano, Melissa (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Navarro, Robert (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Rogstad, Stephen (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Goodhart, Charles (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Proctor, Robert (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Jourdan, Michael (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Rayhrer, Benno (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
August 24, 2013
Publication Date
March 1, 2008
Publication Information
Publication: NASA Tech Briefs, March 2008
Subject Category
Man/System Technology And Life Support
Report/Patent Number
NPO-43646
Distribution Limits
Public
Copyright
Public Use Permitted.

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