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Subsequently, the EKF algorithm is used to estimate the parameters and states in which a message is embedded. Using the EKF with the optimal linear model, the message can be adequately recovered at the receiver. However, the bit error rate is insufficiently small; therefore, presynchronizations and the carrier-digitalized sources are used to reduce the error rate to obtain robust communications. Numerical examples and simulation results demonstrate the effectiveness of the proposed methodology. <\/jats:p>","DOI":"10.1142\/s0218127414500941","type":"journal-article","created":{"date-parts":[[2014,7,30]],"date-time":"2014-07-30T05:32:54Z","timestamp":1406698374000},"page":"1450094","source":"Crossref","is-referenced-by-count":2,"title":["Extended Kalman Filter-Based Codec for Chaotic Communication Systems"],"prefix":"10.1142","volume":"24","author":[{"given":"Jia-Hong","family":"Lin","sequence":"first","affiliation":[{"name":"Department of Electrical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd., Taipei 106, Taiwan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Wei-Song","family":"Lin","sequence":"additional","affiliation":[{"name":"Department of Electrical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd., Taipei 106, Taiwan"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"219","published-online":{"date-parts":[[2014,7,30]]},"reference":[{"key":"rf2","doi-asserted-by":"publisher","DOI":"10.1142\/S0218127496000254"},{"key":"rf3","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevE.55.4979"},{"key":"rf4","doi-asserted-by":"publisher","DOI":"10.1142\/3033"},{"key":"rf5","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevLett.71.65"},{"key":"rf6","doi-asserted-by":"publisher","DOI":"10.1109\/82.246163"},{"key":"rf7","volume-title":"Mastering SIMULINK 2","author":"Dabney J. 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