Patent ID: 9001949
Filing Date: 2015-04-07
Classification: H04L

Abstract:
1. A method in a quadrature amplitude modulation (QAM) receiver for performing timing recovery, wherein the QAM receiver is configured to receive a signal comprising a sequence of symbols, wherein each symbol is represented by a respective IQ pair comprising a respective In-phase (I) component and a respective Quadrature (Q) component, the method comprising: sampling the respective I component and the respective Q component of each IQ pair, wherein the sampling is performed with a relative timing offset between the sampling of the respective I component and the sampling of the respective Q component; establishing a first value associated with a quality of I component samples; establishing a second value associated with a quality of Q component samples; comparing the first value and the second value to determine if a sampling timing should be advanced or delayed to improve the sample quality; and adjusting, to improve the sample quality, subsequent sampling by advancing or delaying the sampling timing based on the comparison between the first and second values to perform timing recovery.