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Sparse channel estimation in OFDM systems by threshold-based pruning

Sparse channel estimation in OFDM systems by threshold-based pruning

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© The Institution of Engineering and Technology
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A threshold-based procedure to estimate sparse channels in an orthogonal frequency division multiplexing (OFDM) system is proposed. An optimal threshold is derived by maximising the probability of correct detection between significant and zero-valued taps estimated by the least squares (LS) estimator. Improved LS estimates are obtained by pruning the LS estimates with the statistically derived threshold.

Inspec keywords: channel estimation; least squares approximations; estimation theory; OFDM modulation; probability

Other keywords: threshold-based pruning; OFDM system; least square estimator; zero-valued tap estimation; sparse channel estimation; correct detection probability; orthogonal frequency division multiplexing

Subjects: Other topics in statistics; Communication channel equalisation and identification; Modulation and coding methods; Interpolation and function approximation (numerical analysis)

References

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