A Distribution-Function-Based AGC Method in OFDM Systems

Zhang  Xiao-Xin; Zou  Li; Zhao  Yu-Ping

doi:10.3724/SP.J.1146.2007.00560

Volume 30 Issue 10

Jan. 2011

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Zhang Xiao-Xin, Zou Li, Zhao Yu-Ping. A Distribution-Function-Based AGC Method in OFDM Systems[J]. Journal of Electronics & Information Technology, 2008, 30(10): 2415-2418. doi: 10.3724/SP.J.1146.2007.00560

Citation:

Zhang Xiao-Xin, Zou Li, Zhao Yu-Ping. A Distribution-Function-Based AGC Method in OFDM Systems[J]. Journal of Electronics & Information Technology, 2008, 30(10): 2415-2418. doi: 10.3724/SP.J.1146.2007.00560

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A Distribution-Function-Based AGC Method in OFDM Systems

doi: 10.3724/SP.J.1146.2007.00560

Received Date: 2007-04-12
Rev Recd Date: 2008-04-28
Publish Date: 2008-10-19

Abstract

Abstract

In Orthogonal Frequency Division Multiplexing (OFDM) systems, there are large estimate errors of the received power in a traditional Automatic Gain Control (AGC). This paper proposes a distribution-function-based AGC method. This method estimates the received power by using the distribution function of the output signal from the Analog to Digital Converter (ADC), and overcomes the clipping effect introduced by the ADC. Simulation results demonstrate that, in OFDM systems, only after one time estimate, the proposed AGC method achieves less than 0.23dB estimate error, whereas the traditional AGC method provides less than 9dB estimate error. Therefore, the proposed AGC method estimates the received power more accurately, and increases greatly the system performance.
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References(1)

References

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