{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2023,10,25]],"date-time":"2023-10-25T06:10:04Z","timestamp":1698214204832},"reference-count":15,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2008,9,12]],"date-time":"2008-09-12T00:00:00Z","timestamp":1221177600000},"content-version":"vor","delay-in-days":5733,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Trans Emerging Tel Tech"],"published-print":{"date-parts":[[1993,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The ESA Data\u2010Relay System (DRS) is a space\u2010borne communications system which provides communications between ground stations and satellites in low Earth orbits (LEOs) with inter\u2010orbit links giving a data\u2010relay facility. The system requires a ground based receiver and modem and this paper describes the implementation of such a receiver relying heavily on Digital Signal Processing Techniques. The spread spectrum receiver and modem is presently under development by Satellites International Limited under contract to the European Space Agency (ESA). The specification requirement for the demodulator is severe, with low signal\u2010to\u2010noise ratios and high Doppler shifts. The demodulator is very flexible in terms of the types of signal it can receive, which include spread spectrum signals. The demodulator is implemented almost completely using digital techniques. Such an approach leads to potentially low implementation losses and allows the use of novel techniques in the receiver's sub\u2010systems.<\/jats:p>","DOI":"10.1002\/ett.4460040110","type":"journal-article","created":{"date-parts":[[2008,9,12]],"date-time":"2008-09-12T13:41:30Z","timestamp":1221226890000},"page":"33-41","source":"Crossref","is-referenced-by-count":1,"title":["Implementation of a Spread Spectrum Receiver and Modem for the Data\u2010Relay System Using Digital Signal Processing"],"prefix":"10.1002","volume":"4","author":[{"given":"Andrew John","family":"Aftelak","sequence":"first","affiliation":[]},{"given":"S. J.","family":"Fielding","sequence":"additional","affiliation":[]},{"given":"Paul","family":"Maguire","sequence":"additional","affiliation":[]},{"given":"Anthony Kim","family":"Ward","sequence":"additional","affiliation":[]},{"given":"Roberto","family":"Madde","sequence":"additional","affiliation":[]}],"member":"311","published-online":{"date-parts":[[2008,9,12]]},"reference":[{"key":"e_1_2_1_2_2","unstructured":"A.Dickinson:The data\u2010relay preparatory programme. \u201cESA Bulletin\u201d No. 61 1990."},{"key":"e_1_2_1_3_2","unstructured":"ESA Bulletin No. 51."},{"key":"e_1_2_1_4_2","unstructured":"T.Beck:ESA earth terminals in the european data relay system. Second European Conference on Satellite Communications (ECSC2) 1991 Liege Belgium 22\u201324 Oct. ESA Publication."},{"key":"e_1_2_1_5_2","volume-title":"Principles of digital data transmission","author":"Clark A. P."},{"key":"e_1_2_1_6_2","unstructured":"C. L.Weber:Candidate receivers for unbalanced QPSK. ITC Proceedings XII 1976 p.455\u2013464."},{"key":"e_1_2_1_7_2","unstructured":"A. J.Aftelak:Data\u2010relay system spread spectrum receiver and modem. Second European Conference on Satellite Communications (ECSC2) 1991 Liege Belgium 22\u201324 Oct. ESA Publication."},{"key":"e_1_2_1_8_2","unstructured":"A. J.Aftelaket al.:Design and implementation of a spread spectrum demodulator for data\u2010relay systems. Submitted for 43rd Congress of the International Astronautical Federation August 28\u2010September 5 1992 Washington D.C."},{"key":"e_1_2_1_9_2","volume-title":"Spread spectrum communications","author":"Holmes J. K."},{"key":"e_1_2_1_10_2","volume-title":"Digital communications: satellite\/earth station engineering","author":"Feher K.","year":"1983"},{"key":"e_1_2_1_11_2","doi-asserted-by":"publisher","DOI":"10.1002\/sat.4600080504"},{"key":"e_1_2_1_12_2","first-page":"387","article-title":"Doppler shift correction via correlation for a received QPSK signal","volume":"6","author":"Clark A. P.","year":"1990","journal-title":"IEE Proc."},{"key":"e_1_2_1_13_2","first-page":"351","article-title":"Carrier phase synchronisation in the demodulation of UQPSK signals","volume":"5","author":"Clark A. P.","year":"1989","journal-title":"IEE Proc"},{"key":"e_1_2_1_14_2","doi-asserted-by":"publisher","DOI":"10.1002\/sat.4600080503"},{"key":"e_1_2_1_15_2","unstructured":"O. A.Cooper R. H. S.Byrne:An object oriented approach in the design and development of a ground\u2010based satellite demodulator. MDS Software Trends Conference 1992 Wembley London."},{"key":"e_1_2_1_16_2","unstructured":"F. M.Gardner:Demodulator reference recovery techniques for digital implementation. Final Report ESTEC Contract No. 6847\/NL\/DG ESA1988."}],"container-title":["European Transactions on Telecommunications"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.wiley.com\/onlinelibrary\/tdm\/v1\/articles\/10.1002%2Fett.4460040110","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/ett.4460040110","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2023,10,24]],"date-time":"2023-10-24T23:12:21Z","timestamp":1698189141000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/ett.4460040110"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1993,1]]},"references-count":15,"journal-issue":{"issue":"1","published-print":{"date-parts":[[1993,1]]}},"alternative-id":["10.1002\/ett.4460040110"],"URL":"https:\/\/doi.org\/10.1002\/ett.4460040110","archive":["Portico"],"relation":{},"ISSN":["1124-318X","1541-8251"],"issn-type":[{"value":"1124-318X","type":"print"},{"value":"1541-8251","type":"electronic"}],"subject":[],"published":{"date-parts":[[1993,1]]}}}