Precompensation of Supply Dynamics of Dynamic Power Supply Transmitters Using a Linear Parameter-Varying Model
Artikel i vetenskaplig tidskrift, 2019
The use of a linear parameter-varying framework is proposed as a viable design tool for dynamic power supply transmitters. Accurate synchronization between the low-and high-frequency paths of these devices is an essential requirement for obtaining optimal results. Using this framework, the estimation of the low-frequency dynamics of the supply path is made possible for actual operational conditions. A precompensation model can, as a result, be designed to compensate for these unwanted dynamics, improving both the linearity and the energy efficiency of the resulting device. Moreover, the procedure does not require access to any internal nodes and can be implemented digitally without modification of the existing hardware. A measurement example demonstrates the advantages and improvements that become possible with the proposed technique.
envelope tracking (ET)
Dynamic power supply (DPS) transmitters
linear parameter-varying (LPV) model