Patent ID: 7200195

Claim:
A received data recovering device for recovering data from an input baseband signal that represents packets having a plurality of fields, the fields including a synchronization data field and error-related data fields, said received data recovering device comprising: clock phase detecting means for sampling the input baseband signal using a sampling signal having a frequency N times the frequency of the baseband signal so as to provide N candidate sampling phases for each field of the baseband signal (N is an integer equal to or greater than 2), storing a sampling value for each of the candidate sampling phases, and deriving optimum clock phase information in said baseband signal for each of the fields set based on a communication standard contained in said baseband signal; and buffer means for receiving said baseband signal using a signal synchronous with said baseband signal, and reading out said baseband signal using said sampling signal produced based on the optimum clock phase information; wherein said clock phase detecting means comprises: phase sampling storing means for sequentially storing sampling data obtained upon sampling said baseband signal using said sampling signal; and optimum phase detecting means, responsive to data taken out from said phase sampling storing means, for selectively performing detection processing of synchronization data contained in the synchronization data field using said data and confirmation processing of error-related data supplied depending on existence of said data, and for detecting an optimum clock phase of the corresponding field so as to output it as the optimum clock phase information for the corresponding field.