Equalization of transmit diversity space-time coded signals
View Patent ↗A method executed in a receiver that combines a decoder with an equalizer in a single module, comprising receiving at time k a signal r(k) in the receiver. Selecting 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)} j (l) is related to both the transmission channel and to the encoding structure in the transmitter, {tilde over (s)}(k) is a trial symbol specified by a selected trellis transition and ŝ(k) is a symbol that was previously decided. Applying the selected signal to the decoder to decode received symbols.
1. A method executed in a receiver that combines a decoder with an equalizer in a single module, comprising the steps of:
said receiver receiving at time k a signal r(k);
selecting as a signal transmitted by a transmitter a signal that minimizes the following equation metric
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where {tilde over (h)} j (1) is related to both the transmission channel and to the encoding structure in said transmitter, {tilde over (s)}(k) is a trial symbol specified by a selected trellis transition and ŝ(k) is a symbol that was previously decided; and
applying said selected signal to said decoder to decode received symbols.
2. The method of claim 1 said signal is selected to improve performance of equalization.