A low pass filter based integrator in a digital feedback loop AGC for WLAN receivers

  • Authors

    • Bharath H P REVA University
    • P I Basarkod REVA University
    2018-11-15
    https://doi.org/10.14419/ijet.v7i4.21417
  • Automatic Gain Control, Quadrature Amplitude Multiplexing, Wireless Local Area Network, Feedback AGC.

  • Abstract

    This paper describes a Digital feedback loop automatic gain control (AGC) for Wireless Local Area Network (WLAN) receivers. The proposed AGC employs a novel lowpass filter-based integrator for the gain generation, which controls digital multiplier to maintain constant signal dynamic range. The AGC performance is analyzed for 16 and 64 Quadra-ture Amplitude Multiplexing-Orthogonal Frequency Division Multiplexing (QAM-OFDM) modulated signal with differ-ent attenuation factors under Additive White Gaussian Noise (AWGN) channel. The proposed AGC has a dynamic range of 70dB with the gain error less than ±1dB and settling time is 1.2µs. The proposed algorithm is validated on a Field Programmable Gate Array (FPGA) platform.

     

     

  • References

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  • How to Cite

    H P, B., & I Basarkod, P. (2018). A low pass filter based integrator in a digital feedback loop AGC for WLAN receivers. International Journal of Engineering & Technology, 7(4), 4558-4562. https://doi.org/10.14419/ijet.v7i4.21417