Joint Parameters Estimation of OFDM Signals in Cognitive Radio

doi:10.13190/jbupt.201102.131.jiangqp

JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 2011, Vol. 34 ›› Issue (2): 131-135.doi: 10.13190/jbupt.201102.131.jiangqp

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Joint Parameters Estimation of OFDM Signals in Cognitive Radio

Online:2011-04-30 Published:2011-04-30

Abstract

Abstract:

A joint parameters estimation algorithm for orthogonal frequency division multiplexing (OFDM) signals was presented based on cyclic autocorrelation function(CAF). Joint estimation of the chip time, the symbol time and symbol useful time parameters of OFDM signals can be realized with the algorithm only by searching the distance between the peaks in the corresponding plane. And a method based on frequency domain accumulation for calculating the CAF of OFDM signals was adopted in low signal noise ratio. The validity of the algorithm was proved by simulations.

Key words: cognitive radio, cyclic autocorrelation function, blind signal processing, orthogonal frequency division multiplexing

References

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Joint Parameters Estimation of OFDM Signals in Cognitive Radio

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