Patent ID: 7165211
Filing Date: 2007-01-16
Classification: H03M

Abstract:
1. A decoder for detecting data within an input signal with attenuated low frequency components comprising: (a) An N-state Viterbi decoder for processing 2N partial input signals to determine N strings of bits, each of which provides the best approximation to the partial input signal of the associated state, said Viterbi decoder having 2N inputs and N terminations that provide access to the said N strings of bits, wherein one of the terminations is used as a decoder output; (b) A correction unit for correcting the DC components of the Viterbi decoder partial input signals, said correction unit having a read-back signal input that is used as a detector input, a bus port and N outputs that are connected to 2N inputs of the Viterbi decoder; (c) A feedback bus for transferring said N strings of bits, said feedback bus having N inputs that are connected to the N terminations of the Viterbi decoder and an output that is coupled with the bus port of the correction unit.