by Lime Microsystems

A software-enabled network-in-a-box based on LimeSDR

View all updates Jun 16, 2017

Lime Adaptive Digital Predistortion (LimeADPD)

PA output spectrum with and without LimeADPD

We’re excited to announce that Lime Micro have open sourced their implementation of adaptive digital predistortion (ADPD) for PA linearisation. This can be used with the LimeNET Base Station and other platforms based around the 4x4 MIMO LimeSDR-QPCIe board, to help meet wireless regulatory specifications, while also improving power efficiency and reducing running costs.

The approach taken uses an indirect learning architecture and an algorithm that is based on modelling a nonlinear system by complex valued memory polynomials. Detailed information on the structure and associated equations can be found over on the Myriad-RF wiki. The implementation for LimeSDR-QPCIe is also covered there, along with measured results for two test cases. The source code has also been published to GitHub under the Apache 2.0 licence.

Andrew and the LimeNET Team

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Product Choices


LimeNET Mini

A high-performance mini PC with an integrated and shielded internal LimeSDR USB micro Type-B, U.FL cables, and antennas. This hardware is fully qualified for compatibility with the LimeNET Ubuntu app store.


LimeNET Gateway

A complete, certified, high-bandwidth cellular gateway that provides Wi-FI and Ethernet Internet connectivity backed by a connection to a 2G, 3G, or 4G macrocell. It provides users with downlink and uplink throughput of 150 and 50 Mbps, respectively, and can connect to any operator network with a SIM card (not included).


Lime Microsystems

Working toward the democratization of wireless communication through an open source ideology.

Ebrahim Bushehri

Jessica Gillingham

Andrew Back

Zack Tamosevicius

Karolis Kiela

Ignas Skudrickas

Alex Gross

Lexi Hatziharalambous

Nayl Dsouza

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