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


Vol. 34,  No. 5, pp. 341-346, May  2009


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  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.

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  Cite this article

[IEEE Style]

J. Kim, Y. Kim, K. Chang, "Joint Scheme of IQ Imbalance Compensation and AGC for Optimal DFE in M-WiMAX Mobile Modem," The Journal of Korean Institute of Communications and Information Sciences, vol. 34, no. 5, pp. 341-346, 2009. DOI: .

[ACM Style]

JongHun Kim, YoungBum Kim, and KyungHi Chang. 2009. Joint Scheme of IQ Imbalance Compensation and AGC for Optimal DFE in M-WiMAX Mobile Modem. The Journal of Korean Institute of Communications and Information Sciences, 34, 5, (2009), 341-346. DOI: .

[KICS Style]

JongHun Kim, YoungBum Kim, KyungHi Chang, "Joint Scheme of IQ Imbalance Compensation and AGC for Optimal DFE in M-WiMAX Mobile Modem," The Journal of Korean Institute of Communications and Information Sciences, vol. 34, no. 5, pp. 341-346, 5. 2009.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880