Work

An Efficient Manifold Algorithm for Constructive Interference Based Constant Envelope Precoding

Year: 2017

Type: article

Abstract: In this letter, we propose a novel manifold-based algorithm to solve the constant envelope (CE) precoding problem with interference exploitation. For a given power budget, we design the precoded symbols subject to the CE constraints, such that the constructive effect of the multiuser interference is maximized. While the objective function for the original problem is not complex differentiable, we consider the smooth approximation of its real representation, and map it onto a Riemannian manifold. By using the Riemmanian conjugate gradient algorithm, a local minimizer can be efficiently found. The complexity of the algorithm is analytically derived in terms of floating-points operations (flops) per iteration. Simulations show that the proposed algorithm outperforms the conventional methods on both symbol error rate and computational complexity.

Source: IEEE Signal Processing Letters

DOI: 10.1109/lsp.2017.2748230

Authors: Fan Liu, Christos Masouros, Pierluigi Vito Amadori, Huafei Sun

Institutions: Beijing Institute of Technology, University College London

Language: English

Topic: Advanced MIMO Systems Optimization

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $1,367

Funders: National Natural Science Foundation of China, China Scholarship Council, Engineering and Physical Sciences Research Council