Montage Technology (shanghai) Co., Ltd.

Montage Lz Semiconductor (shanghai) Co., Ltd.

Xuepeng Wang

Gang Hu

Yuanfei Nie

Zhen Lu

The present application disclosed a decision feedback equalization processing device and method. The device comprises: a channel estimator for receiving an input signal, and determining, based on the input signal, an input signal autocorrelation matrix R, an input-output signal cross-correlation matrix Rand an input-output signal cross-correlation vector r; a tap coefficient calculator for receiving R, Rand r, and calculating a feed-forward equalizer (FFE) tap coefficient vector g and a feedback equalizer (FBE) tap coefficient vector f, wherein at least one of the FFE tap coefficient vector g and the FBE tap coefficient vector f is calculated using a conjugate gradient descent algorithm. The tap coefficient calculator comprises: a circulant matrix construction unit and a fast Fourier transformation (FFT) calculating unit. And the device further comprises a decision feedback equalizer for receiving from the tap coefficient calculator the FFE tap coefficient vector g and the FBE tap coefficient vector f, and performing equalization on the input signal and generating an equalized output signal.

Decision feedback equalization processing device and method

A circuit for predistortion, comprising a digital predistorter configured to generate a modified digital signal by modifying an input baseband signal with a predistortion coefficient; a DAC configured to generate an analog signal by converting the modified digital signal; a PA configured to generate an amplified signal by amplifying the analog signal; an attenuator configured to generate an attenuated signal by attenuating the amplified signal; an ADC configured to generate a attenuated digital signal; a timing synchronizer configured to generate a synchronized amplified signal by synchronizing the attenuated digital signal with the modified digital signal; a statistics generator configured to generate a probability density function of a plurality of samples of the input baseband signal; an orthogonal basis function generator configured to generate a set of normalized orthogonal basis functions; a predistortion coefficient training circuit configured to generate an updated predistortion coefficient.

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Shanghai, China

Xuepeng Wang