Symbol timing offset mitigation in OFDMA-based CoMP utilizing position aware transmission

Le, Tuan Anh, Gherkar, Tejas, Nakhai, Mohammad Reza and Navaie, Keivan (2015) Symbol timing offset mitigation in OFDMA-based CoMP utilizing position aware transmission. In: 2015 IEEE 81st Vehicular Technology Conference (VTC Spring), 11-14 May 2015, Glasgow, Scotland.

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Orthogonal frequency division multiple access and coordinated multipoint transmission/reception are two key techniques employed in LTE-Advanced to provide high speed connectivity to mobile users regardless of their locations within the cells. The combination of the two techniques in a cellular network with large cells however results in timing asynchronization. This leads to symbol timing offset (STO) and, thus, degrades users' performance. In this paper, we propose a novel user position aware (UPA) algorithm to tackle the timing offset problem by partitioning the coverage area into different zones based on users' received power requirements. Serving base stations in each zone are assigned such that their distances to a user within the zone are bounded. Hence, the time difference of signals arrived at the user is controlled and, therefore, the effect of STO is mitigated. We analyze the performance of the proposed method by deriving bounds on the STO, and signal-to-interference-plus-noise ratio (SINR) in different zones. Simulation results confirm that the proposed UPA algorithm significantly reduces the STO and improves users' SINR.

Item Type: Conference or Workshop Item (Paper)
Research Areas: A. > School of Science and Technology > Design Engineering and Mathematics
Item ID: 16406
Useful Links:
Depositing User: Tuan Le
Date Deposited: 05 Jun 2015 09:09
Last Modified: 13 Oct 2016 14:34

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