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:
Feb. 05, 2008
Filed:
Oct. 16, 2003
Thuji S. Lin, Irvine, CA (US);
Tian-min Liu, Laguna Niguel, CA (US);
Stephen E. Krafft, Los Angeles, CA (US);
Thuji S. Lin, Irvine, CA (US);
Tian-Min Liu, Laguna Niguel, CA (US);
Stephen E. Krafft, Los Angeles, CA (US);
Broadcom Corporation, Irvine, CA (US);
Abstract
A carrier recovery, symbol timing, and carrier phase tracking systems and methods suitable for use in connection with a dual-mode QAM/VSB receiver system. In-phase signals are sampled twice a symbol at the in-phase symbol sampling time and at the quadrature-phase symbol sampling time. The signals are de-multiplexed to generate I and Xdata streams, where I represents the in-phase sampling time signals and Xrepresents mid-symbol point sample times. A similar procedure is carrier out on quadrature-phase signals. When the in-phase signal is de-multiplexed to generate a symbol I, the quadrature-phase signal is de-multiplexed to generate its mid-symbol point X. Both I and Q are decoded to define a symbol error term, which is combined with the opposite mid-symbol signal to define a phase error term Pand Pfor each rail.