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:
Jul. 14, 2009
Filed:
Dec. 12, 2005
Philip J. Pietraski, Huntington Station, NY (US);
Mihaela Beluri, Glen Cove, NY (US);
Rui Yang, Greenlawn, NY (US);
Amith Vikram Chincholi, West Babylon, NY (US);
Kenneth P. Kearney, Smithtown, NY (US);
Philip J. Pietraski, Huntington Station, NY (US);
Mihaela Beluri, Glen Cove, NY (US);
Rui Yang, Greenlawn, NY (US);
Amith Vikram Chincholi, West Babylon, NY (US);
Kenneth P. Kearney, Smithtown, NY (US);
InterDigital Technology Corporation, Wilmington, DE (US);
Abstract
A method and apparatus for compensating for phase noise of symbols spread with a long spreading code are disclosed. To compensate for the phase noise, a phase error estimate is generated from despread symbols with a short spreading code. A phase correcting phasor is applied to chip rate data before despreading the data with a long spreading code. A signal-to-interference ratio (SIR) on a common pilot channel (CPICH) may be calculated by spreading the data with a parent spreading code in an orthogonal variable spreading factor (OVSF) code tree and by combining symbols. Alternatively, a magnitude of the symbols may be used in estimating the SIR. The SIR of a channel using a short spreading code and an SIR of a channel using a long spreading code are measured. The SIR of the channel with the long spreading code may be compensated in accordance with a difference between degradation of the SIRs.