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Radio Science Measurements with Suppressed CarrierRadio Science started when it became apparent with early Solar missions that occultations by planetary atmospheres would affect the quality of radio communications. Since then the atmospheric properties and other aspects of planetary science, solar science, and fundamental physics were studied by scientists. Radio Science data was always extracted from a received pure residual carrier (without data modulation). For some missions, it is very desirable to obtain Radio Science data from a suppressed carrier modulation. In this paper we propose a method to extract Radio Science data when a coded suppressed carrier modulation is used in deep space communications. Type of modulation can be BPSK, QPSK, OQPSK, MPSK or even GMSK. However we concentrate mostly on BPSK modulation. The proposed method for suppressed carrier simply tries to wipe out data that acts as an interference for Radio Science measurements. In order to measure the estimation errors in amplitude and phase of the Radio Science data we use Cramer-Rao bound (CRB). The CRB for the suppressed carrier modulation with non-ideal data wiping is then compared with residual carrier modulation under the same noise condition. The method of derivation of CRB for non-ideal data wiping is an innovative method that presented here. Some numerical results are provided for coded system.
Document ID
20150008732
Acquisition Source
Jet Propulsion Laboratory
Document Type
Conference Paper
External Source(s)
Authors
Asmar, Sami
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Divsalar, Dariush
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Oudrhiri, Kamal
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
May 21, 2015
Publication Date
March 2, 2013
Subject Category
Communications And Radar
Meeting Information
Meeting: 2013 IEEE Aerospace Conference
Location: Big Sky, MT
Country: United States
Start Date: March 2, 2013
End Date: March 9, 2013
Sponsors: Institute of Electrical and Electronics Engineers
Distribution Limits
Public
Copyright
Other
Keywords
Cramer-Rao bound

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