Correlation Based SNR Estimation in OFDM System

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Provided by: Global Institute for Research & Education (GIFRE)
Topic: Hardware
Format: PDF
It is very important to estimate the Signal to Noise Ratio (SNR) of received signal and to transmit the signal effectively for the modern communication system. The performance of existing Non-Data-Aided (NDA) SNR estimation methods are substantially degraded for high level modulation scheme such as M-ary amplitude and Amplitude Phase Shift Keying (APSK) or Quadrature Amplitude Modulation (QAM). In this paper, the authors propose a SNR estimation method which uses zero point autocorrelation of received signal per block and auto/cross correlation of decision feedback signal in Orthogonal Frequency Division Multiplexing (OFDM) system.
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