Signal separation and reconstruction method for simultaneously received multi-system signals in flexiblewireless system

Takayuki Yamada, Doohwan Lee, Hiroyuki Shiba, Yo Yamaguchi, Kazunori Akabane, Kazuhiro Uehara

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

We previously proposed a unified wireless system called "Flexible Wireless System". Comprising of flexible access points and a flexible signal processing unit, it collectively receives a wideband spectrum that includes multiple signals from various wireless systems. In cases of simultaneous multiple signal reception, however, reception performance degrades due to the interference among multiple signals. To address this problem, we propose a new signal separation and reconstruction method for spectrally overlapped signals. The method analyzes spectral information obtained by the short-time Fourier transform to extract amplitude and phase values at each center frequency of overlapped signals at a flexible signal processing unit. Using these values enables signals from received radio wave data to be separated and reconstructed for simultaneous multi-system reception. In this paper, the BER performance of the proposed method is evaluated using computer simulations. Also, the performance of the interference suppression is evaluated by analyzing the probability density distribution of the amplitude of the overlapped interference on a symbol of the received signal. Simulation results confirmed the effectiveness of the proposed method.

Original languageEnglish
Pages (from-to)1085-1092
Number of pages8
JournalIEICE Transactions on Communications
VolumeE95-B
Issue number4
DOIs
Publication statusPublished - Apr 2012
Externally publishedYes

Keywords

  • Flexible Wireless System
  • Short-time Fourier transform
  • Signal reconstruction
  • Signal separation

ASJC Scopus subject areas

  • Software
  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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