Sparsity-Aware Ordered Successive Interference Cancellation for Massive Machine-Type Communications

Jinyoup Ahn, Byonghyo Shim, Kwang Bok Lee

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

In massive machine-type communication systems, by exploiting sporadic device activities, compressed sensing-based multi-user detection (CS-MUD) is used to recover sparse multi-user vectors. In CS-MUD, multi-user vectors are detected based on a sparsity-aware maximum a posteriori probability (S-MAP) criterion. To reduce the computational complexity of S-MAP detection, a sparsity-aware successive interference cancellation (SA-SIC) technique can be used. However, SA-SIC does not perform well without proper layer sorting due to error propagation. In this letter, we propose a novel sparsity-aware ordered SIC scheme that finds the optimal detection order based on the activity probabilities and channel gains of devices. Simulation results verify that the proposed scheme greatly improves the performance of SA-SIC.

Original languageEnglish
Pages (from-to)134-137
Number of pages4
JournalIEEE Wireless Communications Letters
Volume7
Issue number1
DOIs
Publication statusPublished - 2018 Feb

Keywords

  • Massive machine-type communication
  • compressed sensing
  • multi-user detection
  • sporadic communication
  • successive interference cancellation

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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