Channel estimation sequence and method of estimating a transmission channel which uses such a channel estimation sequence

摘要

A channel estimation sequence (S^E) embedded in a carrier wave and configured to be transmitted by a transmitter ( 1 ) to a receiver ( 2 ) via a channel ( 3 ) to implement a channel estimation method, the channel estimation sequence consisting of two concatenated sequences (S and G) respectively consisting of two complementary sequences (s and g). The channel estimation method includes, on the transmitter side, transmitting the channel estimation sequence and, on the receiver side, a correlation process consisting of correlating the received signal with the first (s) of the said complementary sequences, correlating the received signal with the second (g), delayed complementary sequences, adding the results of the two correlations, and deducing the characteristics of the channel ( 3 ) from the result of the correlation process. The two complementary sequences (s and g) are extended periodically by extensions (e_s^f, e_s^d and e_g^f, e_g^d) which constitute replicas of their starting part and/or ending part and which are respectively concatenated at the end and/or start of the sequence.