Linearization for wireless access in 5G and beyond
| Reference number | |
| Coordinator | Chalmers Tekniska Högskola AB - Institutionen för Elektroteknik |
| Funding from Vinnova | SEK 4 000 000 |
| Project duration | August 2019 - July 2021 |
| Status | Completed |
| Venture | The strategic innovation programme Electronic Components and Systems: |
Important results from the project
The project´s objective has been to develop and verify algorithms for linearizing of base stations for the wireless networks of the future. These networks puts enormous requirements on energy efficiency along with high bandwidth and many antennas. Through the development of new algorithms that can handle broadband signals on multiple antennas, the project has succeeded in reducing the complexity of linearization by an order of magnitude, which enables the use of energy efficient components, used in their most efficient operating point.
Expected long term effects
Some selected results of the project are: * Developed an understanding of amplifiers with broadband input signals * Designed algorithms that handle multiband signals, by (non-uniform) sampling at a rate corresponding to the sum bandwidth of the input bands. * Development of algorithms for using multi antenna radio to reduce the complexity of linearization of each individual antenna. * Evaluation and verification of algorithms in test beds at Chalmers, Ericsson and Bluetest.
Approach and implementation
The project was divided into five collaborative work packages, WP. In WP1, amplifiers are studied, in particular how an amplifier affects a broadband signal. This understanding was used in WP2 to develop low-complexity algorithms to run the amplifier in an efficient and high-quality way. In WP3, algorithms were developed to hande multi-antenna systems, where perhaps 100s of amplifiers need to be linearized. Then it was WP4´s task to test the broadband multi-antenna algorithms in test beds. Finally, the results were conveyed using WP5.