Blind separation of two users based on user delays and optimal pulse-shape design

Xin Liu, Athina P. Petropulu, H. Vincent Poor, Visa Koivunen

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

A wireless network is considered, in which two spatially distributed users transmit narrow-band signals simultaneously over the same channel using the same power. User separation is achieved by oversampling the received signal and formulating a virtual multiple-input multiple-output (MIMO) system based on the resulting polyphase components. Because of oversampling, high correlations can occur between the columns of the virtual MIMO system matrix which can be detrimental to user separation. A novel pulse-shape waveform design is proposed that results in low correlation between the columns of the system matrix, while it exploits all available bandwidth as dictated by a spectral mask. It is also shown that the use of successive interference cancelation in combination with blind source separation further improves the separation performance.

Original languageEnglish (US)
Article number939340
JournalEurasip Journal on Wireless Communications and Networking
Volume2010
DOIs
StatePublished - 2010

All Science Journal Classification (ASJC) codes

  • Signal Processing
  • Computer Science Applications
  • Computer Networks and Communications

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