Qualcomm incorporated (20250070806). Frequency Selective Digital Pre-Distortion Signal Generation
Contents
Frequency Selective Digital Pre-Distortion Signal Generation
Organization Name
Inventor(s)
Hao-Jen Cheng of San Jose CA (US)
Frequency Selective Digital Pre-Distortion Signal Generation
This abstract first appeared for US patent application 20250070806 titled 'Frequency Selective Digital Pre-Distortion Signal Generation
Original Abstract Submitted
this disclosure provides methods, components, devices and systems for signal generation. some aspects more specifically relate to frequency-selective digital predistortion signal generation. in some examples, the method alters an input signal to produce a frequency-selected linear output signal of a power amplifier. for frequency-selective pre-distortion signal generation, a digital pre-distortion circuit suppresses the non-linear distortion at a specific band using volterra kernels of a volterra series model and a shiftable finite impulse response (fir). the shiftable fir can filter a particular portion of the signal's frequency, and the volterra kernels can capture the non-linear memory effects of the input signals and output signals of the power amplifier. upon refinement of the volterra kernel coefficients, the volterra series model can produce a compensation signal. the shiftable fir can filter the compensation signal to produce a digital pre-distortion signal to input into the power amplifier for transmission.
