A Low-Complexity Algorithm of Joint Multiple Frequency Offsets and Channels Estimation in Cooperative Relay Systems

Abstract:

A low complexity joint estimator of multiple CFOs and Channels is presented in cooperative relay systems. The new algorithm first utilizes correlation-based frequency estimator to get CFOs initial estimation, and then serial interference cancellation based on correlation properties of training sequence in different relays is done to obtain the initial channel estimation. Moreover, a parallel iteration scheme with interference cancellation is proposed to reduce time complexity of the traditional serial iteration. In the overall process, matrix inversion is avoided. Thus, the complexity of the proposed algorithm in both time and computation is much less than the existing algorithms. In last, simulation results verify the iterative algorithm achieves a good performance in Decode and Forward (DF) relay system.

• Periodical: Advanced Materials Research (Volume 748)
• Pages: 1046-1050
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.748.1046
• Online since: August 2013
• Authors: Hui Yan, Zhong Pei Zhang
• Keywords: Parallel Interference Cancellation, Relay, Serial Interference Cancellation, Synchronization

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