Optimal Power Allocation for OFDMA Systems Under I/Q Imbalance

A direct-conversion architecture can offer highly integrated low-cost hardware solutions to communication transceivers. However, it has been demonstrated that radio frequency impairments, such as amplifier nonlinearities, phase noise, and in-phase/quadrature-phase imbalances (IQI), can lead to a severe degradation in the performance and fairness. To this end, we study the power allocation (PA) problem in an orthogonal frequency-division multiple access system, when the served user equipment (UE) suffers from different levels of IQI. Additionally, we present a novel low-complexity solution with directly calculated PA policies, given the Lagrange multiplier, which mitigates the impact of IQI and achieves fairness in terms of capacity for the served UE, by maximizing the minimum achievable capacity of the UE. The effectiveness of the offered solution is validated through simulation results, which reveal that it can drastically increase the minimum achievable UE's capacity.

• Publication year

  2016

• Venue

  IEEE Signal Processing Letters

• Publication date

  2016-09-30

• Fields of study

  Computer Science, Engineering

• Identifiers
  DOI 10.1109/LSP.2016.2614693
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

• Spectrum Sensing in Full-Duplex Cognitive Radio Networks Under Hardware Imperfections

  2017cited by this paper
• Energy Detection Spectrum Sensing Under RF Imperfections

  2016cited by this paper
• On the effects of I/Q imbalance on sensing performance in full-duplex cognitive radios

  2016cited by this paper
• On Convexity of Fairness-Aware Energy-Efficient Power Allocation in Spectrum-Sharing Networks

  2016cited by this paper
• How Much Does I/Q Imbalance Affect Secrecy Capacity?

  2016cited by this paper
• Effects of RF Impairments in Communications Over Cascaded Fading Channels

  2016cited by this paper
• Underlay cognitive radio: What is the impact of carrier aggregation and relaying on throughput?

  2016cited by this paper
• Proactive Relay Selection With Joint Impact of Hardware Impairment and Co-Channel Interference

  2015cited by this paper
• Beam Division Multiple Access Transmission for Massive MIMO Communications

  2015cited by this paper
• I/Q-Imbalance Self-Interference Coordination

  2015cited by this paper
• Autonomous Energy Harvesting Base Stations With Minimum Storage Requirements

  2015cited by this paper
• Energy detection under RF impairments for cognitive radio

  2015cited by this paper
• Exact Average OFDM Subcarrier SINR Analysis Under Joint Transmit–Receive I/Q Imbalance

  2014cited by this paper
• I/Q Imbalance in Two-Way AF Relaying

  2014cited by this paper
• Energy Detection under IQ Imbalance with Single- and Multi-Channel Direct-Conversion Receiver: Analysis and Mitigation

  2014cited by this paper
• Analysis and Augmented Spatial Processing for Uplink OFDMA MU-MIMO Receiver With Transceiver I/Q Imbalance and External Interference

  2014cited by this paper
• I/Q Imbalance in Multiple Beamforming {OFDM} Transceivers: SINR Analysis and Digital Baseband Compensation

  2013cited by this paper
• Blind Compensation of Frequency-Dependent I/Q Imbalance in Direct Conversion OFDM Receivers

  2013cited by this paper
• Time Domain Blind I/Q Imbalance Compensation Based on Real-Valued Filter

  2012cited by this paper
• Blind Frequency-Dependent I/Q Imbalance Compensation for Direct-Conversion Receivers

  2010cited by this paper
• Analysis and Compensation of Transmitter IQ Imbalances in OFDMA and SC-FDMA Systems

  2009cited by this paper
• Digital Compensation of Frequency-Dependent Joint Tx/Rx I/Q Imbalance in OFDM Systems Under High Mobility

  2009cited by this paper
• RF Imperfections in High-rate Wireless Systems

  2008cited by this paper
• Ieee Transactions on Communications, Accepted for Publication 1 Ofdm Opportunistic Relaying under Joint Transmit/receive I/q Imbalance

  year unknowncited by this paper

• Equalization Techniques for SC-FDMA Systems Under Radio Imbalances at Both Transmitter and Receiver

  2023cites this paper
• Solving IQ Mismatch Problem for Two-Path Successive Relaying OFDMA Uplink Systems With Direct Conversion Transceivers

  2019cites this paper
• Impact of I/Q Imbalance on Amplify-and-Forward Relaying: Optimal Detector Design and Error Performance

  2019cites this paper
• Resource allocation in wireless networks with energy constraints

  2018cites this paper
• Interference mitigation techniques in modern wireless communication systems

  2016cites this paper