Robust channel estimation for wireless systems

Details Robust channel estimation for wireless systems Robust channel estimation for wireless systems

2011-08-02

2011-08-02

Fan, Chieh M (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

C375S340000

Reexamination Certificate

active

07991059

ABSTRACT:
The present invention relates to a method, apparatus, and computer program product, wherein frequency co-variances or correlations of a measured power delay profile or frequency correlation function are estimated at two different non-zero sub-carrier lags of an orthogonal frequency division multiplexing channel. A ratio of squared magnitudes of the two estimated frequency co-variances is calculated and a delay spread or coherence bandwidth of said channel is estimated based on the calculated ratio.

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patent: 2009/0041095 (2009-02-01), Lee et al.
Mobile Channel Characteristics, Chapter 5, Second Order Statistics of Fading, The Kluwer International Series in Engineering and Computer Science, 2002.
C.R.N. Athaudage and A.D.S. Jayalath, “A Novel RMS Delay-Spread Estimation Technique for Wireless OFDM Systems”, Ultra-Broadband Information Networks and Australian National University, 2003 IEEE.
Athanasios Doukas and Grigorios Kalivas, “A Novel Blind Trms Estimation Method for Wireless OFDM Systems”,Department of Electrical and Computer Engineering, University of Patras, Patra, Greece, Feb. 2006.
Tevfik Yucek and Huseyin Arslan, Delay Spread and Time Dispersion Estimation for Adaptive OFDM Systems, Department of Electrical Engineering, University of South Florida, 2006 IEEE.
Athanasios Doukas, et al.; “A Novel Blind Delay Spread Estimation Using Frequency Correlation For Wireless OFDM Systems”; pp. 1-4, Sep. 2006.
Hüseyin Arslan, et al.; “Delay Spread Estimation for Wireless Communciation Systems”; IEEE 2003; pp. 1-6.
Office Action issued Mar. 22, 2011 for corresponding Korean patent application No. 10-2010-7002580, with English translation.

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