A receiver for determining a representation of signal noise, comprising: at least one receiver chain (12A, 12B,...12M) for receiving an incoming signal ( r n,a, r n,b,... r n,m) having a predetermined sequence of training symbols ( w 11... w 4) including a pre-pended section of pre-pended symbols ( w 11...w 15) followed by a center section of center symbols ( w 0...w 15) followed by a post-pended section of post-pended symbols ( w 0...w 4) said pre-pended symbols duplicating a certain number of said center symbols ( w 0... w 15) at the end of said center section, said post-pended symbols duplicating a certain number of said center symbols ( w 0... w 15) at the start of said center section, and determining at least one receiver chain signal (r n,a, r n,b,... r n,m), respectively; and a noise estimator (46A, 46B,...46M) coupled with the receiver chain (12A, 12B,...12M) for generating cyclic channel dispersed replica symbols corresponding to said training symbols and determining at least one noise representation ( p a, p b..) for said incoming signal ( r n,a, r n,b,... r n,m) by comparing said dispersed replica symbols to signal symbols in said at least one receiver chain signal ( r n,a, r n,b,... r n,m), characterized in that the noise estimator (46A, 46B,...46M) includes a cyclic sequence generator for shifting stored symbols replicating said center symbols ( w 0...w 15) for providing shifted circular replica symbols and a convolver (104I, 104Q) coupled to said sequence generator for convolving said shifted circular replica symbols with channel impulse response coefficients ( h 0,a...h 5,a) for providing said dispersed replica symbols. at least one receiver chain (12A, 12B,...12M) for receiving an incoming signal ( r n,a, r n,b,... r n,m) having a predetermined sequence of training symbols ( w 11... w 4) including a pre-pended section of pre-pended symbols ( w 11...w 15) followed by a center section of center symbols ( w 0...w 15) followed by a post-pended section of post-pended symbols ( w 0...w 4) said pre-pended symbols duplicating a certain number of said center symbols ( w 0... w 15) at the end of said center section, said post-pended symbols duplicating a certain number of said center symbols ( w 0... w 15) at the start of said center section, and determining at least one receiver chain signal (r n,a, r n,b,... r n,m), respectively; and a noise estimator (46A, 46B,...46M) coupled with the receiver chain (12A, 12B,...12M) for generating cyclic channel dispersed replica symbols corresponding to said training symbols and determining at least one noise representation ( p a, p b..) for said incoming signal ( r n,a, r n,b,... r n,m) by comparing said dispersed replica symbols to signal symbols in said at least one receiver chain signal ( r n,a, r n,b,... r n,m), characterized in that the noise estimator (46A, 46B,...46M) includes a cyclic sequence generator for shifting stored symbols replicating said center symbols ( w 0...w 15) for providing shifted circular replica symbols and a convolver (104I, 104Q) coupled to said sequence generator for convolving said shifted circular replica symbols with channel impulse response coefficients ( h 0,a...h 5,a) for providing said dispersed replica symbols.