Patent ID: 7469006

Claim:
A receiver comprising: a front-end stage for receiving an input signal and providing at time k a signal r(k); a processing stage responsive to said signal r(k) that selects as a signal transmitted by a transmitter a signal that minimizes the following equation metric ξ j ⁡ ( k ) =  r ⁢ ⁢ ( k ) - ∑ l = L 1 + 1 L 1 ⁢ ⁢ h ~ j ⁡ ( l ) ⁢ ⁢ s ~ ⁢ ⁢ ( k - l ) - ∑ l = L 1 + 1 L + 1 ⁢ ⁢ h ~ j ⁡ ( l ) ⁢ ⁢ s ^ ⁢ ⁢ ( k - l )  2 where {tilde over (h)},(l) is related to both a transmission channel through which said input signal arrived at said front-end stage and to an encoding structure in the transmitter, that causes said input signal to arrive at said front-end stage {tilde over (s)}(k) is a trial symbols specified by a selected trellis transition and {tilde over (s)}(k) is a symbols that was previously decided; and a decoder responsive to said processing stage for decoding received symbols.