Patent ID: 6320911
Filing Date: 2001-11-20
Classification: H04J

Abstract:
A system for providing information about clock frequency of a data source in a digital receive-transmit system, wherein the clock frequency of the data source has a value which is sent at a preset rate (FP), in order to ensure correct reception of information by receiver means (R), comprising:measuring means (CP, CN, CM) for performing a frequency measurement (U') of a first frequency (FQ1) of a first signal (FS) as compared to a second frequency (FQ2) of a second signal (FT), wherein said first frequency (FQ1) is associated with the data source, wherein said second frequency (FQ2) is associated with the transmission system and is used as a reference signal to measure the first signal (FS), and wherein said measuring means (CP, CN, CM) are prearranged to perform said measurement (U') at a measuring rate (F) higher than said preset rate (FP); andpost-processing means (P) for coding the frequency measurement (U') and supplying a coded signal (U) at said preset rate (FP) to the receiver means (R), wherein the post-processing means (P) maintains in the frequency measurement (U') a precision (Q) supplied by the measurement means (CP, CN, CM) and determined by the measuring rate (F), and wherein the precision (Q) is higher than a precision (QP) determined by the preset rate (FP).