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Low-complexity time-domain SNR estimation for OFDM systems

Low-complexity time-domain SNR estimation for OFDM systems

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© The Institution of Engineering and Technology
Published

A low-complexity signal-to-noise ratio (SNR) estimation algorithm for orthogonal frequency division multiplexing (OFDM) systems in frequency-selective fading channels is proposed. The estimator is based on a conventional preamble having two identical parts. It uses the correlation of the received signal samples to estimate signal power while noise power is estimated using the difference between received samples. Simulation results show that the proposed estimator is robust to the channel's frequency selectivity and its attained accuracy and reduced complexity make it an attractive choice for current wireless OFDM systems.

Inspec keywords: signal sampling; channel estimation; white noise; OFDM modulation; fading channels; time-domain analysis; frequency selective surfaces

Other keywords: frequency selective fading channels; signal sampling; while noise power; SNR estimation; signal-to-noise ratio; orthogonal frequency division multiplexing; signal power estimation; wireless OFDM systems; time-domain analysis

Subjects: Mathematical analysis; Communication channel equalisation and identification; Radio links and equipment; Signal processing and detection; Other topics in statistics; Modulation and coding methods

References

    1. 1)
      • Zivkovic, M., Mathar, R.: `Preamble-based SNR estimation in frequency selective channels for wireless OFDM systems', Proc. IEEE 69th Vehicular Technology Conf., 2009, Barcelona, Spain.
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