Digital Pre-distortion (DPD) has become the industry standard for linearity improvement in digital amplifier designs. By measuring transmitter non linearity and applying an inverse function to the digital modulator output, digital pre-distortion provides automated real time correction of transmitter non-linearities, improving amplifier linearity, efficiency and cost.

Memory Effect Correction. 20MHz Bandwidth @ 122Msps. 20-30dB ACLR Correction. Equalizer and AQM Correction.

The Affarii DPD01 predistortion core is a third generation adaptive pre-distortion engine supporting linearization of RF devices exhibiting both reactive and thermal memory characteristics. The processor works with both Class-AB and Doherty amplifier architectures using industry standard LDMOS and GaN RF devices and can provide up to 30dB of ACLR correction in typical designs.

The predistortion processor includes transmit equalization and quadrature modulator correction functions making it is suitable for use with either direct conversion or digital IF transmitter architectures. Adaption of the filter coefficients is provided by an on chip processor core with hardware acceleration functions.

The DPD core is suitable for operation with continuous and packet systems and meets the performance requirements of single and multi-carrier 3GPP and HSDPA LTE and WiMAX standards with production margins.

Availability

The DPD01 predistortion processor is available as a standalone IP block as part of the digitalTRX solution set. For further information please contact sales@affarii.com