New Blind Recognition Method of SCLD and OFDM Based on Cyclostationarity
Previous studies on blind recognition of the modulation format of a received signal is generally performed in single domain, e.g. frequency or time domain. This paper presents a new approach by defining a dual domain decision function, which makes use of signals features that the magnitude of second-order cyclic cumulants of orthogonal frequency division multiplexing (OFDM) signals and single carrier linear digitally modulated (SCLD) signals has an obvious difference in both time and frequency domain. The proposed algorithm enlarges the distinguish gap between OFDM and SCLD. The results of simulation experiments confirm the theoretical analysis.
KeywordsBlind recognition OFDM Second order cyclostationarity
This work was supported by the National Natural Science Foundation of China under grant 61271181, and the Fundamental Research Funds for the Central Universities under grant 2013RC0104.
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