Evolutionary Multiobjective Optimization for Adaptive Dataflow-based Digital Predistortion Architectures
Journal Title: EAI Endorsed Transactions on Cognitive Communications - Year 2017, Vol 3, Issue 10
Abstract
In wireless communication systems, high-power transmitters suffer from nonlinearities due to power amplifier (PA) characteristics, I/Q imbalance, and local oscillator (LO) leakage. Digital Predistortion (DPD) is an effective technique to counteract these impairments. To help maximize agility in cognitive radio systems, it is important to investigate dynamically reconfigurable DPD systems that are adaptive to changes in the employed modulation schemes and operational constraints. To help maximize effectiveness, such reconfiguration should be performed based on multidimensional operational criteria. With this motivation, we develop in this paper a novel evolutionary algorithm framework for multiobjective optimization of DPD systems. We demonstrate our framework by applying it to develop an adaptive DPD architecture, called the adaptive, dataflow-based DPD architecture (ADDA), where Pareto-optimized DPD parameters are derived subject to multidimensional constraints to support efficient predistortion across time-varying operational requirements and modulation schemes. Through extensive simulation results, we demonstrate the effectiveness of our proposed multiobjective optimization framework in deriving efficient DPD configurations for run-time adaptation.
Authors and Affiliations
Lin Li, Amanullah Ghazi, Jani Boutellier, Lauri Anttila, Mikko Valkama, Shuvra S. Bhattacharyya
Keywords
Related Articles
- EP ID EP45662
- DOI http://dx.doi.org/10.4108/eai.23-2-2017.152187
- Views 270
- Downloads 0
Cross-Layer Design for Two-Way Relaying Networks with Multiple Antennas
In this paper, we developed a cross-layer design for two-way relaying (TWR) networks with multiple antennas, where two single antenna source nodes exchange information with the aid of one multiple antenna relay node. The...
Mi-MMAC: MIMO-Based Multi-Channel MAC Protocol for WLAN
In order to meet the proliferating demands in wireless local area networks (WLANs), the multi-channel media access control (MMAC) technology has attracted a considerable attention to exploit the increasingly scarce spect...
A Life Extend Approach Based on Priority Queue N Strategy for Wireless Sensor Network
In this paper, we proposed a method on the tradeoff between packet transmission speed and battery life in wireless sensor networks (WSN). The data obtained by sensor nodes comprised various types of information with vari...
Scenarios and business models for mobile network operators utilizing the hybrid use concept of the UHF broadcasting spectrum
This paper explores and presents scenarios and business models for mobile network operators (MNOs) in the novel hybrid use spectrum sharing concept of the Ultra High Frequency broadcasting spectrum (470-790 MHz) used for...
Switching Brains: Cloud-based Intelligent Resources Management for the Internet of Cognitive Things
Cognitive technologies can bring important benefits to our everyday life, enabling connected devices to do tasks that in the past only humans could do, leading to the Cognitive Internet of Things. Wireless Sensor and Act...