Patent ID: 8654915

Claim:
A control signal receiver, comprising: a converting circuit configured to convert an input signal and to generate a complex control symbol stream including transmission configurations; and a synchronization detection circuit configured to: generate a first bit stream by applying a first determination criterion to the complex control symbol stream, and to generate a first synchronization signal by comparing the first bit stream with a reference synchronization word, and to generate a second bit stream by applying the first determination criterion to the complex control symbol stream and a second determination criterion in that order, and to generate a second synchronization signal by comparing the second bit stream with the reference synchronization word, and to output one of the first synchronization signal and the second synchronization signal as a synchronization enable signal, wherein the synchronization detection circuit comprises: a first pattern detection block configured to convert the complex control symbol stream using the first determination criterion to generate the first bit stream and configured to generate the first synchronization signal by comparing the first bit stream with the reference synchronization word; a second pattern detection block configured to convert the complex control symbol stream using the first determination criterion to generate a third bit stream and configured to generate at least one error complex control symbol when the third bit stream does not include the reference synchronization word, and configured to generate the second bit stream by applying the second determination criterion to the at least one error complex control symbol and configured to generate the second synchronization signal by comparing the second bit stream with the reference synchronization word; and a synchronization decision block configured to output one of the first synchronization signal and the second synchronization signal as the synchronization enable signal.