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| Channel Estimation and Optimization for Cooperative Communication Systems Based on Distributed Space-frequency Coding |
| Zhang Qing-chuan① Shu Feng① Sun Jin-tao① Wang Dong-ming② |
①(School of Electronic Engineering and Optoelectronic Technique, Nanjing University of Science and Technology, Nanjing 210094, China)
②(National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China) |
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Abstract In this paper, the issue of channel estimation is investigated for distributed space-frequency coding system in cooperative communications. To make the channel being identifiable, Cyclic Convolution Filters (CCF) are utilized at the relay nodes. In the training stage, the suboptimal design is derived for both the pilot sequence and CCFs adopted at relay nodes. Furthermore, the closed expression of power allocation between source node and relay nodes is obtained. Finally, computer simulations demonstrate the effectiveness of the proposed approach.
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Received: 01 December 2009
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Corresponding Authors:
Zhang Qing-chuan
E-mail: schiller_chang@hotmail.com
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2010, Vol. 32 
