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Single-Carrier Frequency Domain Equalization for Broadband Cooperative Communications

Single-Carrier Frequency Domain Equalization for Broadband Cooperative Communications
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Author(s): Tae-Won Yune (POSTECH, Republic of Korea), Dae-Young Seol (POSTECH, Republic of Korea), Dongsik Kim (POSTECH, Republic of Korea)and Gi-Hong Im (POSTECH, Republic of Korea)
Copyright: 2010
Pages: 29
Source title: Cooperative Communications for Improved Wireless Network Transmission: Framework for Virtual Antenna Array Applications
Source Author(s)/Editor(s): Murat Uysal (University of Waterloo, Canada)
DOI: 10.4018/978-1-60566-665-5.ch015

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Abstract

Cooperative diversity is an effective technique to combat the fading phenomena in wireless communications without additional complexity of multiple antennas. Multiple terminals in the network form a virtual antenna array in a distributed fashion. Even though each of them is equipped with only one antenna, spatial diversity gain can be achieved through cooperation. In this chapter, we discuss relay-assisted single carrier transmissions extending conventional transmit diversity schemes. We focus on distributed space-frequency block coded single carrier transmission, in order to operate over fast fading channels. A pilot design technique is also discussed for channel estimation of this single carrier cooperative system, which shows better channel tracking performance than conventional block-type channel estimations. In addition, spectral efficient cooperative diversity protocols are presented, where the users access a relay simultaneously or transmit superposed data blocks. Interference from the other user is effectively removed by using an iterative detection technique.

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