The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 07, 2001
Filed:
Sep. 20, 1999
Jian Yang, Mansfield, MA (US);
Motorola Inc., Shaumburg, IL (US);
Abstract
During operation a transmitter and receiver of a central site termination unit (TU-C) (,) are driven by a sample clock derived from a network clock source (,). A remote termination unit (TU-R) (,) operates with a free running sampling clock and acquires and tracks the network clock (,) from a downstream signal (,). The regenerated network clock is then used to drive both the receiver (,) and the transmitter (,) of the TU-R (,). In particular, the transmit samples are generated on a block by block basis using fast algorithms. To avoid glitches during data transmission caused by block processing, the data sample at the boundary of blocks of data is replaced by an interpolated value. In particular, a first order approximation to the correct value of the boundary sample is made, and the first order approximation is substituted in place of the boundary data sample of the block.