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. 19, 2010
Filed:
Apr. 30, 2009
Wen-sheng Hou, Hsinchu County, TW;
Yun-shen Chang, Hsinchu County, TW;
Chun-hsien Wen, Hsinchu County, TW;
Jiunn-tsair Chen, Hsinchu County, TW;
Wen-Sheng Hou, Hsinchu County, TW;
Yun-Shen Chang, Hsinchu County, TW;
Chun-Hsien Wen, Hsinchu County, TW;
Jiunn-Tsair Chen, Hsinchu County, TW;
Ralink Technology Corp., Jhubei, Hsinchu County, TW;
Abstract
A lookup table generation method for a predistorter comprises sending a first single tone signal with a maximum expected amplitude to a channel simulation device including the power amplifier, estimating a closed loop gain and a closed loop phase of the power amplifier according to the first single tone signal and a first simulation output signal generated outputted by the channel simulation device, sending a plurality of single tone signals to the channel simulation device, each single tone signal having an amplitude different from all others of the plurality of single tone signals and lower than the maximum expected amplitude, generating a plurality of predistortion parameters according to the closed loop gain, the closed loop phase, the plurality of single tone signals and a plurality of simulation output signals outputted by the channel simulation device, and storing the plurality of predistortion parameters in a lookup table of the predistorter.