Blind Separation of Two Users Based on User Delays and Optimal Pulse-Shape Design

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

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)
159 Downloads (Pure)


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
Article number939340
Pages (from-to)1-12
JournalEURASIP Journal on Wireless Communications and Networking
Publication statusPublished - 2010
MoE publication typeA1 Journal article-refereed

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