Back to results
US 9,813,190 B1Granted
Pre-distortion calibration
AssigneeIntel IP Corporation
InventorsIlan Sutskover, Roy Nahum, Yuval Dafna, Ran Shimon, Tzahi Weisman, Roy Amel
Life of this patent
Estimating the term…
Abstract
Described herein are technologies related to an implementation of a closed-loop system to measure and compensate non-linearity in a transceiver circuitry of a device.
Claims23
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.
2 more elements
A method for evaluating transmit performance of a transceiver of a device, the method comprising:
- receiving, by a synchronization block, a Power Amplifier (PA) output signal via a loopback and a filtered transmit signal;
- correcting, by the synchronization block, data of the filtered transmit signal for at least one of phase, gain and delay, wherein the filtered transmit signal is filtered by a compensation filter, and
- assessing, by a performance assessor, transmit performance of the corrected, filtered transmit signal, wherein the performance assessor comprises at least one of an Error Vector Magnitude (EVM) meter, a mask meter, and an Adjacent Channel Leakage Ratio (ACLR) meter,
- wherein the transmit performance is used to control a parameter of subsequent data to be transmitted.
1 more element
A method for evaluating transmit performance of a transceiver of a device, the method comprising:
- receiving, by a synchronization block, a Power Amplifier (PA) output signal via a loopback and a filtered transmit signal;
- correcting, by the synchronization block, data of the filtered transmit signal for at least one of phase, gain and delay, wherein the filtered transmit signal is filtered by a compensation filter;
- and
- assessing, by a performance assessor, transmit performance of the corrected, filtered transmit signal, the transmit performance being used to control a parameter of subsequent data to be transmitted,
- wherein the controlled parameter is an offset in pre-distortion look-up table entries.
2 more elements
A device, comprising:
- a compensation filter configured to filter a digital transmit signal, wherein a Fast Fourier Transform (FFT) engine is configured to estimate a linear transfer function of a loopback signal to set coefficients of the compensation filter,
- a Power Amplifier Pre-Distortion (PAPD) analyzer coupled to the compensation filter and configured to compare the loopback signal with the filtered digital transmit signal;
- and
- a PAPD Look-Up Table (LUT) configured based on the comparison, wherein the PAPD LUT is for implementing pre-distortion correction of subsequent data packets to be transmitted.
1 more element
Dependencies are inferred from the claim text.