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

• Author(s): Ms. G. T. Bharathy ; Ms. G. Bhargavi ; Ms. S. Bhavanisankari ; Ms. T. Tamilselvi
• Paper ID: 1701426
• Page: 352-355
• Published Date: 03-08-2019
• Published In: Iconic Research And Engineering Journals
• Publisher: IRE Journals
• e-ISSN: 2456-8880
• Volume/Issue: Volume 3 Issue 1 July-2019

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

Citations

IRE Journals:
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

IEEE:
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, 3(1)