Double Side Signal Splitting SWIPT for Downlink CoMP Transmissions with Capacity Limited Backhaul

Kai Liang, Liqiang Zhao, Zhiguo Ding, Hsiao Hwa Chen

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

This letter studies power allocation for simultaneous wireless information and power transfer in downlink coordinated multipoint (CoMP) systems. A central unit (CU) conveys data and channel information to multiple radio remote units (RRUs) via a capacity-limited backhaul. We provide a dual polarized (DP) antenna-based double side signal splitting method. Specifically, signals are split up into information decoding part [user equipment (UE) data transmitted from CU] and energy harvesting part (deterministic data created at RRUs), which are transmitted and received via vertical and horizontal polarizations of DP antennas, respectively. Normal beamformers (such as zero forcing and maximum ratio transmission) are used to reduce complexity. The problem is to maximize the sum rate satisfying per-UE received power, per-backhaul-link capacity, and per-RRU power transmission constraints. The results are provided to verify the effectiveness of the proposed scheme.

Original languageBritish English
Pages (from-to)2438-2441
Number of pages4
JournalIEEE Communications Letters
Volume20
Issue number12
DOIs
StatePublished - Dec 2016

Keywords

  • capacity limited backhaul
  • CoMP
  • Double side signal splitting
  • dual polarized antennas
  • SWIPT

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