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Unformatted text preview: , but somehow the first bit is lost and the received sequence is incorrectly synchronised giving the received sequence r = (11,01,00,00,11,10). Starting at state zero, use the Viterbi algorithm to decode this sequence. Note that when there is incorrect synchronisation, the state metrics increase rapidly. This fact can be used to detect and then correct for incorrect bit synchronisation. Question 4 (6): Given the same code as in Question 3, and a soft decision BPSK demodulator with Q = ∞ , decode the following received sequence using maximum likelihood metrics and the Viter-bi algorithm (starting at state zero), r = (–0.5,–1.2, 0.8,–1.1, 0.5,0.8, –1.0,2.0, 1.2,–1.2, 1.3,–1.2, –1.0,0.8)....
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This note was uploaded on 10/16/2011 for the course ELECTRICAL EE251202 taught by Professor Rejaei during the Spring '10 term at Sharif University of Technology.
- Spring '10