Patent ID: 9166776
Filing Date: 2015-10-20
Classification: H04B,H04L

Abstract:
1. A method for pseudorandom noise (“PN”) phase detection of a received signal by a PN phase detector for a digital terrestrial multimedia broadcast (“DTMB”) receiver, wherein the received signal has a plurality of frames and each frame of the plurality of frames has a plurality of symbols and each symbol of the plurality of symbols having a PN portion, wherein each PN portion having an initial phase offset designated from a plurality of initial phase offsets (m), comprising the steps of: selecting a detection range of symbols by the PN phase detector from a frame of the received signal; applying fast-fourier transform (“FFT”) to the PN portion of each of the symbols in the detection range to generate an FFT output H applying phase rotation to the FFT output H applying differential operations to the phase rotated output summing the plurality of values H calculating a quality value Q as a function of the summation output H determining the PN phase offset by the PN phase detector as a function of the quality value Q and a predefined threshold, wherein the variables n,p,d, and k are integers.