OFDM Blind Parameter Identification in Cognitive Radios

Conference: PIMRC 2005 - 16th Annual IEEE International Symposium on Personal Indoor and Mobile Radio Communications
09/11/2005 - 09/14/2005 at Berlin, Germany

Proceedings: PIMRC 2005

Pages: 6Language: englishTyp: PDF

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Ishii, Hiroyuki; Wornell, Gregory W. (Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge MA 02140, USA)

In this paper we introduce a blind parameter identification algorithm for Orthogonal Frequency Division Multiplexing (OFDM) signals. The algorithm correlation-based processes automatically estimate all parameters of OFDM signals with a blind process that works from a limited amount of data without any prior information. We also derive novel identification performances of algorithms under various conditions, assuming actual conditions in feasible systems: data offset, AWGN, frequency offset, and fading channels. The algorithm is essential for two systems: first, Cognitive Radios, one of the most exciting being radios that change fundamental parameters frequently to provide high throughput and high quality of services; and, second, Radio Monitoring Systems that detect illegal signals transmitted by unlicensed devices.