Digital Pre-Distortion (DPD)

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Xilinx provides a market leading DPD solution that reduces CapEx and OpEx

Digital Pre-Distortion (DPD) is one of the most fundamental building blocks in wireless communication systems today. It is used to increase the efficiency of Power Amplifiers. By reducing the distortion created by running Power Amplifiers in their non-linear regions, Power Amplifiers can be made to be far more efficient. Wireless base stations not employing CFR or DPD algorithms typically exhibit low efficiency, and therefore high operational and capital equipment costs. A typical Class AB LDMOS Power Amplifier with WCDMA waveforms may have approximately 15-20% efficiency. With CFR and DPD turned on, this efficiency can grow to as much as 40%, resulting in tremendous savings in CapEx and OpEx for network operators. With later generations of Power Amplifier design leveraging Doherty architectures, efficiencies in the 50%+ range with Xilinx DPD are possible.

The Xilinx DPD core reduces implementation time by providing a high performance DPD solution to customers as a parameterizable core rather than one that needs to be customized by hand. Furthermore, Xilinx DPD is tuned for implementation in Xilinx FPGAs, resulting in a very small FPGA footprint and the lowest cost FPGA solution available today. Xilinx DPD IP now predistorts and handle long term memory effects seen with Gallium Nitride (GaN) amplifiers, enabling customers to excellent efficiency while meeting stringent spectral emission mask (SEM) requirements as well as Error Vector Magnitude (EVM) at all power levels.

Xilinx DPD v11.0 supports the following air interface standards:

• 5G NR
  
• LTE FDD/TDD
• LTE-Advanced/LTE-Advanced Pro
  
• TD-SCDMA
• WCDMA
• WiMAX
• CDMA2000