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http://dx.doi.org/10.7840/KICS.2011.36A.5.423

Carrier Frequency Offset and 2-D AoA Estimation Method for an OFDM-based Mobile Relay Station with Uniform Circular Array  

Ko, Yo-Han (School of Electrical & Electronic Engineering, Chung-Ang University)
Cho, Yong-Soo (School of Electrical & Electronic Engineering, Chung-Ang University)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.36, no.5A, 2011 , pp. 423-431 More about this Journal
Abstract
In this paper, carrier frequency offset and 2-D AoA (Angle-of-Arrival) estimation methods are proposed for an OFDM-based MRS (Mobile Relay Station) with UCA (Uniform Circular Array). The proposed methods are performed by using the preamble symbol in downlink and can improve the performance of CFO estimation significantly, compared with the conventional method. The proposed methods can be divided into two methods (method 1 and method 2) depending on the order of the AoA estimation and CFO estimation. It is shown by computer simulation under Mobile WiMAX environments that the proposed methods can estimate the CFOs and AoAs of adjacent BSs effectively.
Keywords
Carrier Frequency Offset; 2-D AoA Estimation; Uniform Circular Array;
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