US 9,813,190 B1
Pre-distortion calibration
Ilan Sutskover, Hadera (IL); Roy Nahum, Beer Sheva (IL); Yuval Dafna, Raanana (IL); Ran Shimon, Ramar Gan (IL); Tzahi Weisman, Mevaseret Tzion (IL); and Roy Amel, Haifa (IL)
Assigned to Intel IP Corporation, Santa Clara, CA (US)
Filed by Intel IP Corporation, Santa Clara, CA (US)
Filed on Jul. 1, 2016, as Appl. No. 15/200,924.
Int. Cl. H03H 7/40 (2006.01); H04L 1/00 (2006.01); H04L 12/26 (2006.01); H04L 25/03 (2006.01); H04L 12/741 (2013.01); H04L 7/00 (2006.01); H04L 27/26 (2006.01)
CPC H04L 1/0042 (2013.01) [H04L 7/0008 (2013.01); H04L 25/03847 (2013.01); H04L 27/265 (2013.01); H04L 43/028 (2013.01); H04L 45/745 (2013.01)] 23 Claims
OG exemplary drawing
1. A method of performing pre-distortion calibration in a transceiver of a device, the method comprising:
estimating a linear transfer function of a loopback signal to set coefficients of a compensation filter,
filtering, by the compensation filter, a digital transmit signal, wherein the compensation filter is configured to act as an echo canceller during the estimation of the linear transfer function;
comparing, by a Power Amplifier Pre-Distortion (PAPD) analyzer, the loopback signal with the filtered digital transmit signal; and
configuring a PAPD Look-Up Table (LUT) based on the comparison, wherein the PAPD LUT is for implementing pre-distortion correction of subsequent data packets to be transmitted.