| 摘要 |
A method of estimating qualities of a transmission or telecommunications channel involves using a pair of complementary sequences s(n) and g(n), with n=0, 1, . . . , N-1, which have the property that the sum of their auto-correlations is a perfect Dirac function (that is, Phis,s(n)+Phig,g(n)=k.delta(n)). A composite signal made up of two complementary sequences s(n) and g(n) is used, after having time multiplexed these two sequences in such a way as to exploit the property Phis,s(n)=Phig,g(n)=k.delta(n). The composite signal is made up of two sequences which are concatenated with, between them, a guard interval of a duration greater than or equal to the length of the impulse response of the channel to be estimated.
|
