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Joint Scheme of IQ Imbalance Compensation and AGC for Optimal DFE in M-WiMAX Mobile Modem  

Kim, Jong-Hun (인하대학교 정보통신대학원 이동통신연구실)
Kim, Young-Bum (인하대학교 정보통신대학원 이동통신연구실)
Chang, Kyung-Hi (인하대학교 정보통신대학원 이동통신연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.34, no.5A, 2009 , pp. 341-346 More about this Journal
Abstract
M-WiMAX (Mobile-Worldwide Interoperability for Microwave Access) system, which uses OFDM (Orthogonal Frequency Division Multiplexing) technique, is known to be proper for mobile high-speed data transmission system. Nevertheless, M-WiMAX is seriously sensitive to IQ imbalance caused by the LO (Local Oscillator) at the receiver. In this paper, we analyze the effect of IQ imbalance on the system, and then propose a joint optimization scheme that can optimize DFE (Digital Front-end) of mobile modem by combining operation duplicated between AGC (Automatic Gain Control) and the estimation and compensation of IQ imbalance. Simulation results show that the proposed scheme achieves the same performance of the conventional scheme while reducing the complexity of the H/W implementation.
Keywords
M-WiMAX; IQ Imbalance; AGC; Digital front-end;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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