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Record 1 of 24423
Radio Science Measurements with Suppressed Carrier
External Online Source: hdl:2014/44951
Author and Affiliation:
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)
Abstract: Radio 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.
Publication Date: Mar 02, 2013
Document ID:
20150008732
(Acquired May 26, 2015)
Subject Category: COMMUNICATIONS AND RADAR
Document Type: Conference Paper
Publication Information: (SEE 20150007804)
Meeting Information: 2013 IEEE Aerospace Conference; 2-9 Mar. 2013; Big Sky, MT; United States
Meeting Sponsor: Institute of Electrical and Electronics Engineers; New York, NY, United States
Financial Sponsor: Jet Propulsion Lab., California Inst. of Tech.; Pasadena, CA, United States
Description: 9p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: PLANETARY ATMOSPHERES; RADIO COMMUNICATION; CRAMER-RAO BOUNDS; METEOROLOGICAL PARAMETERS; SPACE COMMUNICATION; PHASE SHIFT KEYING; ATMOSPHERIC CHEMISTRY; SOLAR PHYSICS; MODULATION; PHASE ERROR; CODING
Other Descriptors: CRAMER-RAO BOUND
Availability Source: Other Sources
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