A Strong Anti-Jamming Algorithm Based on FPGA for Estimating Loop Delay in Digital Predistortion System |
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Authors: | Feng-Jun Li Jing-Fu Bao Hong-Yun Huang Shao-Chun Jin |
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Institution: | 1.School of Electronic Engineering,University of Electronic Science and Technology of China,Chengdu 610054,China |
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Abstract: | At present what are the key points focused in the research of loop-delay estimation for the digital predistorter in the radio frequency (RF) power amplifier system is reducing its complexity of engineering realization and improving anti-jamming ability and computational speed. Besides, opening up its application scope should be contained. For these targets, a novel method including integer loop delay estimation and fractional part is proposed. The integer part applies amplitude-difference summation function and the fractional one adopts the method of finite impulse response (FIR) linear interpolation. The algorithm finds wide applications. What is more, strong anti-jamming ability and low complexity are also its merits. Simulation results support the above opinion. Digital predistortion (DPD) system based on this algorithm achieves good performance. |
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Keywords: | Baseband digital predistortion linearinterpolation loop delay estimation power amplifier |
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