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After a discussion on the potential benefits of the use of digital predistortion (DPD) on high power amplifiers (HPA) in phased array radar systems, current work is presented on amplifier and predistorter modeling towards this goal. Simulated HPA performance results utilizing DPD demonstrate a significant decrease in spectral spreading versus non-predistorted waveforms, and testing DPD on a physical...
This paper presents initial results on utilizing the Volterra series, more specifically the Memory Polynomial model subset of the Volterra series, to model the power and frequency dependent non-linear distortion of a physical power amplifier. This modeling technique is also used to create the necessary digital predistortion so that, when used in series with the same modeled high power amplifier, the...
With spectral management of the radio spectrum becoming such a large concern in modern society due to an increasing need for faster wireless data transfer, the current utilization of the radio frequency spectrum must first be measured and analyzed before improvements to the current system can be designed and implemented. Choosing the High Frequency (HF) band to serve as a representative of the entire...
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