Patent ID: 7065166

Claim:
A receiver for determining a representation of signal noise, comprising: at least one receiver chain for receiving an incoming signal having a predetermined sequence of training symbols including a pre-pended section of pre-pended symbols, followed by a center section of center symbols, followed by a post-pended section of post-pended symbols, said pre-pended symbols duplicating a certain number of said center symbols at the end of said center section, said post-pended symbols duplicating a certain number of said center symbols at the start of said center section, and determining at least one receiver chain signal, respectively; and a noise estimator coupled with the receiver chain for generating cyclic channel dispersed replica symbols corresponding to said training symbols and determining at least one noise representation for said incoming signal by comparing said dispersed replica symbols to signal symbols in said at least one receiver chain signal the noise estimator includes a cyclic sequence generator for shifting stored symbols replicating said center symbols for providing shifted circular replica symbols; and a convolver coupled to said sequence generator for convolving said shifted circular replica symbols with channel impulse response coefficients for providing said dispersed replica symbols.