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:
Oct. 29, 2013
Filed:
Dec. 01, 2011
Songping Wu, Cupertino, CA (US);
Gang Liu, Fremont, CA (US);
Daxiao Yu, Cupertino, CA (US);
Yonghua Song, Cupertino, CA (US);
Songping Wu, Cupertino, CA (US);
Gang Liu, Fremont, CA (US);
Daxiao Yu, Cupertino, CA (US);
Yonghua Song, Cupertino, CA (US);
Marvell International Ltd., Hamilton, BM;
Abstract
Systems and methods for using non-crystal-based reference oscillators in the transmission and reception of frequency-modulated signals are disclosed. To protect against intrusion on neighboring designated frequency bands, guard bands, having a collective width greater than the total expected error based on the contribution of the frequency error from the non-crystal-based oscillators in the transmitter and/or receiver, can be designated. To protect against inter-channel interference within a designated frequency band, transmitters and receivers can include static sub-bandwidths wider than any possible total frequency error, such that it would be impossible for a transmitter or receiver to attempt to communicate on an unintended sub-band. The determination of the total possible frequency error can be determined dynamically based on the correlation between a received training sequence and a known pattern before or a communication session to avoid or correct for frequency offset or drift due to the use of non-crystal-based reference oscillators.