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http://dx.doi.org/10.7840/KICS.2011.36A.5.432

Analysis and Compensation of STO Effects in the Multi-band OFDM Communication System of TDM Reception Method  

Lee, Hui-Kyu (충북대학교 전자정보대학 전자공학과)
Ryu, Heung-Gyoon (충북대학교 전자정보대학 전자공학과)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.36, no.5A, 2011 , pp. 432-440 More about this Journal
Abstract
For the 4th generation mobile communication, LTE-advanced system needs the broad frequency band up to 100MHz for providing the data rate of maximum 1Gpbs. However, it is very difficult to secure the broad frequency band in the current frequency allocation situation. So, carrier aggregation was proposed as the solution, in which several fragmented frequency bands are used at the same time. Basically, multiple parallel receivers are required to get the information data from the different frequency bands but this conventional multi-chain receiver system is very inefficient. Therefore, in this paper, we like to study the single chain system that is able to receive the multi-band signals in a single receiver based on the time division multiplexing (TDM) reception method. This proposed TDM receiver efficiently manage to receive the multi-band signals in time domain and handle the baseband signals with one DSP board. However, the serious distortion could be generated by the sampling timing offset (STO) in the TDM-based system. Therefore, we like to analyze STO effects in the TDM-based system and propose a compensation method using estimated STO. Finally, it is shown by simulation that the proposed method is appropriate for the single chain receiver and show good compensation performance.
Keywords
Multi-band; OFDM; TDM Reception; STD; Carrier Aggregation;
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