DECODER FOR A TRELLIS ENCODED SIGNAL CORRUPTED BY NTSC CO-CHANNEL INTERFERENCE AND WHITE NOISE

摘要

A receiver for decodingencoded data transmitted by atransmitting station including (i) sum(50) and difference (46) filters forfiltering the encoded data (R(n))and providing corresponding sum(V(n)) and difference (U(n)) filteredoutputs, (ii) first and secondvariable amplifiers (54 and 56) forrespectively controlling the sum anddifference filtered outputs so as toprovide corresponding sum anddifference controlled filtered outputsthat vary along a continuum in orderto suppress co-channel interferenceand white Gaussian noise in theencoded data, and (iii) a Viterbidecoder (58) for decoding the sum anddifference controlled filtered outputto recover uncoded data.