Simplified polynomial digital predistortion for multimode software defined radios

Georgios Kardaras, José Soler, Lars Dittmann

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

Increasing the efficiency of mobile communication networks while keeping operational and maintenance cost at reasonable level is a major task for operators. Multimode radios capable of operating according to various mobile broadband standards, such as WCDMA, WiMAX and LTE, represent the new trend for resolving these challenges. A transparent radio solution, agnostic to wireless standards, with high capacity and low power consumption is the overall target. Regulating power consumption for radio modules can be achieved by introducing linearization methods for power amplifiers. This paper presents a simplified approach using polynomial digital predistortion in the intermediated frequency (IF) domain. It is fully implementable in software and no hardware changes are required on the digital or analog platform. The adaptation algorithm selected was Least Mean Squares because of its relevant simplicity compared to more sophisticated adaptation algorithms, which are expensive in FPGA hardware resources. Simulation results show improvement of Adjacent Channel Power Ratio (ACPR) over 20dB by reducing the 3rd and 5th order intermodulation products providing compliance to the strict spectrum mask requirements. In the mean time, the Error Vector Magnitude (EVM) is maintained below 2% meeting the requirements for WiMAX and LTE wireless standards.
Original languageEnglish
Title of host publicationproceedings COGART
Publication date2010
Publication statusPublished - 2010
Event3rd International Workshop on Cognitive Radio and Advanced Spectrum Management - Rome, Italy
Duration: 1 Jan 2010 → …
Conference number: 3

Conference

Conference3rd International Workshop on Cognitive Radio and Advanced Spectrum Management
Number3
CityRome, Italy
Period01/01/2010 → …

Cite this

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title = "Simplified polynomial digital predistortion for multimode software defined radios",
abstract = "Increasing the efficiency of mobile communication networks while keeping operational and maintenance cost at reasonable level is a major task for operators. Multimode radios capable of operating according to various mobile broadband standards, such as WCDMA, WiMAX and LTE, represent the new trend for resolving these challenges. A transparent radio solution, agnostic to wireless standards, with high capacity and low power consumption is the overall target. Regulating power consumption for radio modules can be achieved by introducing linearization methods for power amplifiers. This paper presents a simplified approach using polynomial digital predistortion in the intermediated frequency (IF) domain. It is fully implementable in software and no hardware changes are required on the digital or analog platform. The adaptation algorithm selected was Least Mean Squares because of its relevant simplicity compared to more sophisticated adaptation algorithms, which are expensive in FPGA hardware resources. Simulation results show improvement of Adjacent Channel Power Ratio (ACPR) over 20dB by reducing the 3rd and 5th order intermodulation products providing compliance to the strict spectrum mask requirements. In the mean time, the Error Vector Magnitude (EVM) is maintained below 2{\%} meeting the requirements for WiMAX and LTE wireless standards.",
author = "Georgios Kardaras and Jos{\'e} Soler and Lars Dittmann",
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Kardaras, G, Soler, J & Dittmann, L 2010, Simplified polynomial digital predistortion for multimode software defined radios. in proceedings COGART. 3rd International Workshop on Cognitive Radio and Advanced Spectrum Management, Rome, Italy, 01/01/2010.

Simplified polynomial digital predistortion for multimode software defined radios. / Kardaras, Georgios; Soler, José; Dittmann, Lars.

proceedings COGART. 2010.

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

TY - GEN

T1 - Simplified polynomial digital predistortion for multimode software defined radios

AU - Kardaras, Georgios

AU - Soler, José

AU - Dittmann, Lars

PY - 2010

Y1 - 2010

N2 - Increasing the efficiency of mobile communication networks while keeping operational and maintenance cost at reasonable level is a major task for operators. Multimode radios capable of operating according to various mobile broadband standards, such as WCDMA, WiMAX and LTE, represent the new trend for resolving these challenges. A transparent radio solution, agnostic to wireless standards, with high capacity and low power consumption is the overall target. Regulating power consumption for radio modules can be achieved by introducing linearization methods for power amplifiers. This paper presents a simplified approach using polynomial digital predistortion in the intermediated frequency (IF) domain. It is fully implementable in software and no hardware changes are required on the digital or analog platform. The adaptation algorithm selected was Least Mean Squares because of its relevant simplicity compared to more sophisticated adaptation algorithms, which are expensive in FPGA hardware resources. Simulation results show improvement of Adjacent Channel Power Ratio (ACPR) over 20dB by reducing the 3rd and 5th order intermodulation products providing compliance to the strict spectrum mask requirements. In the mean time, the Error Vector Magnitude (EVM) is maintained below 2% meeting the requirements for WiMAX and LTE wireless standards.

AB - Increasing the efficiency of mobile communication networks while keeping operational and maintenance cost at reasonable level is a major task for operators. Multimode radios capable of operating according to various mobile broadband standards, such as WCDMA, WiMAX and LTE, represent the new trend for resolving these challenges. A transparent radio solution, agnostic to wireless standards, with high capacity and low power consumption is the overall target. Regulating power consumption for radio modules can be achieved by introducing linearization methods for power amplifiers. This paper presents a simplified approach using polynomial digital predistortion in the intermediated frequency (IF) domain. It is fully implementable in software and no hardware changes are required on the digital or analog platform. The adaptation algorithm selected was Least Mean Squares because of its relevant simplicity compared to more sophisticated adaptation algorithms, which are expensive in FPGA hardware resources. Simulation results show improvement of Adjacent Channel Power Ratio (ACPR) over 20dB by reducing the 3rd and 5th order intermodulation products providing compliance to the strict spectrum mask requirements. In the mean time, the Error Vector Magnitude (EVM) is maintained below 2% meeting the requirements for WiMAX and LTE wireless standards.

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ER -