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:
May. 05, 2015
Filed:
Sep. 09, 2011
Meng Wang, Solna, SE;
Shaohua LI, Beijing, CN;
Robert Baldemair, Solna, SE;
Jung-fu Cheng, Fremont, CA (US);
Farshid Ghasemzadeh, Sollentuna, SE;
Magnus Larsson, Sollentuna, SE;
Johan Sköld, Solna, SE;
Meng Wang, Solna, SE;
Shaohua Li, Beijing, CN;
Robert Baldemair, Solna, SE;
Jung-Fu Cheng, Fremont, CA (US);
Farshid Ghasemzadeh, Sollentuna, SE;
Magnus Larsson, Sollentuna, SE;
Johan Sköld, Solna, SE;
Telefonaktiebolaget L M Ericsson (publ), Stockholm, SE;
Abstract
A wireless communication node () dynamically estimates passive intermodulation (PIM) interference coupled into the node's receive path from the transmission of a composite signal through the node's transmit path. The node () then cancels the estimated PIM interference in the receive path. In some embodiments, the node dynamically estimates the PIM interference as a function of the composite signal that models PIM interference generation and coupling in the node () according to one or more coefficients (). The coefficients () may be determined by transmitting a test signal () during a test stage, when the node () is not scheduled to receive any signal. Later, when the composite signal () is transmitted, the node () uses the coefficients () to dynamically estimate and cancel the resulting PIM interference.