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In this letter, a robust multisampling rate digital predistortion (DPD) scheme is proposed to linearize ultra‐broadband power amplifiers (PAs) under the limited DAC sampling rate. In the ultra‐broadband scenarios, it is no longer affordable to employ DACs with 3‐5 times over‐sampling rate, which will inevitably lead to spectrum aliasing for the sake of high order basis function and compromise the...
A robust and low sampling rate digital predistortion (DPD) algorithm for broadband power amplifiers (PAs) is proposed in this paper. To alleviate the burden on the sampling rate, an approximated model extracted by bandlimited signals is employed to approach the broadband behavior. Due to the assistance of the low pass filter (LPF) in the feedback loop and the adaptive basis function scheme, the sampling...
This paper proposes a method to extract the wideband model of power amplifiers (PAs) with narrow band signals, so that the sampling rate of the analog digital converter (ADC) can be even lower than the bandwidth of the signal. By sweeping the frequency response with narrow band signals and combining the envelopes of input and output signals, a wideband model of PA is observed. The model can be used...
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