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1701426PublishedVol 3 · Issue 1

A Study On MIMO-OFDM Modems For Adaptive Frequency Domain Channel Estimator

Ms. G. T. Bharathy Ms. G. Bhargavi Ms. S. Bhavanisankari Ms. T. Tamilselvi

Subject area: Science,Engineering and Technology  ·  Area of research: Electronics and Communication Engineering

Abstract

This paper presents an adaptive frequency-domain channel estimator (FD-CE) for equalization of space?time block code multiple-input multiple-output (MIMO) orthogonal frequency-division multiplexing (OFDM) systems in time-varying frequency-selective fading. The proposed adaptive FD?CE ensures the channel estimation accuracy in each set of four MIMO-OFDM symbols. Performance evaluation shows that the proposed method achieved a 10% packet error rate of 64 quadrature amplitude modulation (QAM) at 29.5 dB SNR under 120 km/h (Doppler shift is 266 Hz) in 4x4 MIMO-OFDM systems. To decrease complexity, the rich feature of Alamouti-like matrix is exploited to derive an efficient very large-scale integration (VLSI) solution. Finally, this adaptive FD-CE using an in-house 0.13- m CMOS library occupies an area 3x3.1 mm2, and the 4x4 MIMO-OFDM modem consumes about 62.8 mW at 1.2 V supply voltage.

Keywords

Adaptive equalizers, multiple-input multiple-output(MIMO) systems, orthogonal frequency-division multiplexing (OFDM), VLSI

How to cite this paper

Ms. G. T. Bharathy, Ms. G. Bhargavi, Ms. S. Bhavanisankari, Ms. T. Tamilselvi " A Study On MIMO-OFDM Modems For Adaptive Frequency Domain Channel Estimator " Iconic Research And Engineering Journals Volume 3 Issue 1 2019 Page 352-355
Ms. G. T. Bharathy, Ms. G. Bhargavi, Ms. S. Bhavanisankari, Ms. T. Tamilselvi " A Study On MIMO-OFDM Modems For Adaptive Frequency Domain Channel Estimator " Iconic Research And Engineering Journals, vol. 3, no. 1, Jul. 2019
Ms. G. T. Bharathy, Ms. G. Bhargavi, Ms. S. Bhavanisankari, Ms. T. Tamilselvi (2019). A Study On MIMO-OFDM Modems For Adaptive Frequency Domain Channel Estimator . Iconic Research And Engineering Journals, 3(1).
Ms. G. T. Bharathy, Ms. G. Bhargavi, Ms. S. Bhavanisankari, Ms. T. Tamilselvi " A Study On MIMO-OFDM Modems For Adaptive Frequency Domain Channel Estimator " Iconic Research And Engineering Journals, vol. 3, no. 1, Jul. 2019. 
@article{1701426,
      author = {Ms. G. T. Bharathy, Ms. G. Bhargavi, Ms. S. Bhavanisankari, Ms. T. Tamilselvi},
      title = { A Study On  MIMO-OFDM Modems For Adaptive Frequency Domain Channel Estimator  },
      journal = {Iconic Research And Engineering Journals},
      year = {2019},
      volume = {3},
      number = {1},
      pages = {352-355},
      issn = {2456-8880},
      url = {https://www.irejournals.com/formatedpaper/1701426.pdf},
      abstract = {This paper presents an adaptive frequency-domain channel estimator (FD-CE) for equalization of space?time block code multiple-input multiple-output (MIMO) orthogonal frequency-division multiplexing (OFDM) systems in time-varying frequency-selective fading. The proposed adaptive FD?CE ensures the channel estimation accuracy in each set of four MIMO-OFDM symbols. Performance evaluation shows that the proposed method achieved a 10% packet error rate of 64 quadrature amplitude modulation (QAM) at 29.5 dB SNR under 120 km/h (Doppler shift is 266 Hz) in 4x4 MIMO-OFDM systems. To decrease complexity, the rich feature of Alamouti-like matrix is exploited to derive an efficient very large-scale integration (VLSI) solution. Finally, this adaptive FD-CE using an in-house 0.13- m CMOS library occupies an area 3x3.1 mm2, and the 4x4 MIMO-OFDM modem consumes about 62.8 mW at 1.2 V supply voltage.},
      keywords = {Adaptive equalizers, multiple-input multiple-output(MIMO) systems, orthogonal frequency-division multiplexing (OFDM), VLSI},
      month = {July},
  }