First-order cyclostationarity-based blind recognition of M-FSK signals

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Authors
  1. Dobre, O.A.
Corporate Authors
Defence R&D Canada - Ottawa, Ottawa ONT (CAN);Memorial Univ of Newfoundland, St John's NFLD (CAN) Faculty of Engineering and Applied Science
Abstract
In this report, first-order cyclostationarity of M-ary frequency shift keying (M-FSK) signals affected by additive Gaussian noise, phase, frequency offset and timing errors is investigated and applied to recognizing the modulation order, M. The number of first-order cycle frequencies (CFs) detected in the received FSK signal is employed as discriminating feature for modulation order recognition. Based on this feature, a recognition algorithm is proposed, which does not require timing and carrier recovery, and estimation of signal and noise powers as preprocessing tasks. In addition, the algorithm is developed with no prior information on the CFs at the receive-side. Nevertheless, the hypothetical case when knowledge of CFs is available at the receive-side is also investigated, as providing a benchmark for recognition performance evaluation. A theoretical performance analysis is carried out, and simulations are run to verify theoretical developments.

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Report Number
DRDC-OTTAWA-CR-2009-295 — Contractor Report
Date of publication
01 Apr 2010
Number of Pages
34
DSTKIM No
CA033917
CANDIS No
533400
Format(s):
Electronic Document(PDF)

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