Cyclostationarity-based Algorithm for Blind Recognition of OFDM and Single Carrier Linear Digital Modulations

• Published in: 2007 IEEE 18th International Symposium on Personal, Indoor and Mobile Radio Communications pp. 1 - 5
• Main Authors: Punchihewa, A., Dobre, O.A., Rajan, S., Inkol, R.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01.09.2007
• Subjects: Additive white noise; Algorithm design and analysis; Analytical models; Carbon capture and storage; Chirp modulation; Digital modulation; OFDM modulation; Phase modulation; Signal analysis; Timing
• ISBN: 9781424411436; 1424411432
• ISSN: 2166-9570
• DOI: 10.1109/PIMRC.2007.4394310

The paper studies the cyclostationarity of an orthogonal frequency division multiplexing (OFDM) with a view to recognizing OFDM against single carrier linear digital (SCLD) modulations. The analytical expressions for the nth-order cyclic cumulants (CCs) and cycle frequencies of an OFDM signal embedded in additive white Gaussian noise and subject to phase, frequency and timing offsets are derived An algorithm based on a second-order CC is proposed to recognize OFDM against SCLD modulations. The recognition algorithm of the authors obviates the need for preprocessing tasks, such as symbol timing estimation, carrier and waveform recovery, and signal and noise power estimation. The results of simulation experiments confirm the theoretical analysis.