Patent ID: 9203511
Filing Date: 2015-12-01
Classification: H04B,H04L,H04Q

Abstract:
1. A method for carrier phase recovery of a carrier wave modulated with a plurality of information symbols, the method comprising: generating a first estimate of an optimal phase angle corresponding to a digital signal by performing a coarse blind phase search; generating a second estimate of the optimal phase angle corresponding to the digital signal by inputting the digital signal and the first estimate of the optimal phase angle into a first maximum likelihood phase recovery and decoding block; and generating a third estimate of the optimal phase angle corresponding to the digital signal by inputting the digital signal and the second estimate of the optimal phase angle into a second maximum likelihood phase recovery and decoding block, wherein the carrier wave is modulated with M-ary quadrature amplitude modulation and the performing the coarse blind phase search comprises testing fewer than M test phase angles.