LimeADPD

Lime Microsystems fully open source solution for PA linearisation based on adaptive digital pre-distortion (ADPD), delivered as FPGA IP and host software.

Power amplifiers (PA) always exhibit some degree of non-linearity, and the higher linearity products are much more expensive. The Lime Adaptive Digital Pre-Distortion (ADPD) core allows tight transmitter specifications to be met using a lower cost PA, by correcting the non-linear operation. In the case of radio frequency (RF) PAs, linearization also improves power efficiency and subsequently reduces the running cost of the wireless infrastructure.

Considering the PA performance for a given air interface, adjacent channel power ratio (ACPR) and error vector magnitude (EVM) are the key considerations to provide support for sophisticated modulation schemes, multi-carrier signals, and high modulation bandwidths.

Open source

Lime Microsystems fully open source solution for PA linearisation is based on adaptive digital pre-distortion (ADPD). The FPGA RTL and host software sources can be found on GitHub. For more in-depth technical details, please see the wiki page.

Supported hardware

LimeADPD is supported on the LimeSDR QPCIe board, and the LimeNET Base Station which provides a fully integrated hardware solution complete with a powerful Intel Core i7-6950X based host, power amplifiers and duplexers.

See also:

Products

LimeSDR QPCIe

Double the capacity (4x4 MIMO) of the original LimeSDR PCIe, this board is at the heart of the LimeNET Core and, by extension, the LimeNET Base Station.
LimeSDR_QPCIe_Featured

LimeNET Base Station

The LimeNET Base Station integrates a LimeSDR-QPCIe with a powerful 3.5GHz Intel Core i7-6950X host, along with power amplifiers and duplexers, to provide everything you need to set up your own cellular network — all in one compact package.

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