Frequency offset estimation and compensation for high performance wireless communications in substation automation

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United States of America Patent

PATENT NO 11489710
APP PUB NO 20210006449A1
SERIAL NO

16969715

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Abstract

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A method is used for frequency offset estimation in a wireless communication network that employs time based scheduling of packets. The method is performed by a packet receiver in the wireless communication network. The method includes receiving a packet from a packet transmitter. The packet includes a preamble that is composed of samples of a single orthogonal frequency-division multiplexing symbol. The preamble has a cyclic prefix (CP) defined by a repetition of samples from an end-portion of the preamble and the preamble, except for the CP, is free from any repeated sequence of samples. The method also includes determining a sequence of similarity measure values between the CP of the preamble and the end-portion of the preamble, applying a low-pass filter to the sequence of similarity measure values, resulting in a filtered sequence of similarity measure values, and performing frequency offset estimation on the filtered sequence of similarity measure values.

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Patent Owner(s)

  • HITACHI ENERGY SWITZERLAND AG

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Dzung, Dacfey Wettingen, CH 24 214
Luvisotto, Michele Västerås, SE 18 5
Pang, Zhibo Västerås, SE 22 7

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