Patent ID: 7277514

Claim:
A device for cancelling inter-symbol interference in a sequence of digital signal input samples ({r n } nεN ) originating from a transmission channel defined by its transfer function H(f) in the frequency domain, each sample being representative of a complex symbol, comprising: a first filter that converges towards a filter with a transfer function H(f), the first filter receives a sequence of samples ({{tilde over (d)} n } nεN ) as input representing the digital signal sent to the input of the transmission channel; a subtractor circuit to subtract the output ({{tilde over (d)}′ n } nεN ) of the first filter from the sequence of input samples ({r n } nεN) ; a second filter that converges towards a filter tuned to the transmission channel, the output ({e n } nεN) from the subtractor circuit being input to this second filter; and an output circuit designed to combine the output from the second filter and the sequence of samples ({{tilde over (d)} n } nεN) representative of the digital signal sent to the input of the transmission channel to generate a sequence of complex symbols ({{tilde over ({tilde over (d)} n } nεN) without the inter-symbol interferences generated by the transmission channel.