Mediatek Corporation

Chen-Jui Hsu

Chun-Hsien Peng

I-No Liao

Jen-Yang Liu

Ching-Shyang Maa

Hua-Lung Yang

Wei-Chiang Li

A method of reducing memory effect of a power amplifier (PA), for a look-up table (LUT) based memory digital pre-distortion (DPD) circuit of an electronic device is disclosed. The method comprises generating a pre-distorted signal according to a LUT including parameters of an input signal amplitude and an input signal delay associated with a bandwidth of a signal inputted to the memory DPD circuit, and outputting the pre-distorted signal to the PA for improving the nonlinearity of the PA.

Method of reducing memory effect of power amplifier

A method employed by a circuit included within a receiver apparatus and configured for performing IQ mismatch compensation when receiver apparatus is operating under data reception mode includes: transforming a data signal, which is generated by a radio frequency receiver under the data reception mode, from time domain into a plurality of frequency bin signals in frequency domain; calculating to obtain at least one frequency domain calibration parameter according to the plurality of frequency bin signals in frequency domain; and, updating at least one coefficient parameter of IQ mismatch compensation according to the obtained at least one frequency domain calibration parameter, to make IQ mismatch compensation compensate IQ mismatch based on the updated at least one coefficient parameter.

Circuit, method, and receiver apparatus for performing on-the-fly IQ mismatch compensation

Growing community of inventors

Hsinchu County, Taiwan

Chen-Jui Hsu