Methods and Systems for Optimal PN Phase Detection in DTMB Receivers

摘要

A method and system for pseudorandom noise (“PN”) phase detection in digital terrestrial multimedia broadcast (“DTMB”) receivers. This method selects a detection range of symbols from a frame of the received signal; applies FFT to the PN portion of each of the symbols in the detection range to generate H_n(k); applies phase rotation to H_n(k) to obtain phase rotated for the PN portion of the symbols in the detection range; applies differential operations to to generate H_p^d ; sums the H_p^d to generated H_sum; calculates a value Q as a function of H_sum; and determines the PN phase offset as a function of Q and a predefined threshold.