Interference Exploitation-based Hybrid Precoding with Robustness Against Phase Errors

Abstract

Hybrid analog-digital precoding significantly reduces the hardware costs in massive MIMO transceivers when compared to fully-digital precoding at the expense of increased transmit power. In order to mitigate the above shortfall, we use the concept of constructive interference-based precoding, which has been shown to offer significant transmit power savings when compared with the conventional interference suppression-based precoding in fully-digital multiuser MIMO systems. Moreover, in order to circumvent the potential quality-of-service degradation at the users due to the hardware impairments in the transmitters, we judiciously incorporate robustness against such vulnerabilities in the precoder design. Since the undertaken constructive interference-based robust hybrid precoding problem is nonconvex with infinite constraints and thus difficult to solve optimally, we decompose the problem into two subtasks, namely, analog precoding and digital precoding. In this paper, we propose an algorithm to compute the optimal constructive interference-based robust digital precoders. Furthermore, we devise a scheme to facilitate the implementation of the proposed algorithm in a low-complexity and distributed manner. We also discuss block-level analog precoding techniques. Simulation results demonstrate the superiority of the proposed algorithm and its implementation scheme over the state-of-the-art methods.

References in corpus (11)

• Scaling up MIMO: Opportunities and Challenges with Very Large Arrays
• Spatially Sparse Precoding in Millimeter Wave MIMO Systems
• Hybrid Digital and Analog Beamforming Design for Large-Scale Antenna Arrays
• A Coordinated Approach to Channel Estimation in Large-scale Multiple-antenna Systems
• Limited Feedback Hybrid Precoding for Multi-User Millimeter Wave Systems
• Low-Complexity Hybrid Precoding in Massive Multiuser MIMO Systems
• Exploiting Known Interference as Green Signal Power for Downlink Beamforming Optimization
• Block-Sparse Recovery via Convex Optimization
• Rethinking the Role of Interference in Wireless Networks
• A Unified Successive Pseudo-Convex Approximation Framework
• Block- and Rank-Sparse Recovery for Direction Finding in Partly Calibrated Arrays

Cited by in corpus (2)

• Coordinated Hybrid Precoding for Interference Exploitation in Heterogeneous Networks
• Interference Exploitation via Symbol-Level Precoding: Overview, State-of-the-Art and Future Directions