On-The-Fly Synchronization Using Wavelet and Wavelet Packet OFDM
نویسندگان
چکیده
Wavelet analysis has strong advantages over Fourier analysis, as it allows a time-frequency representation domain, allowing optimal resolution and flexibility. Although OFDM principle has been proposed long time ago, its implementation is quite new and still raises some challenges as frame synchronization. Moreover, wavelet analysis has been proposed only recently for OFDM. While classical synchronization methods use cyclic prefix and Maximum Likehood function or learning sequences, a new dynamic method of synchronization using wavelet OFDM with Haar wavelet is proposed in this paper. Besides, while Fourier OFDM synchronization has been subject to intensive research, synchronization using Wavelet OFDM has not been so deeply studied. Based on the properties of such wavelets, two algorithms are set up for synchronization either with Wavelet or Wavelet Packet OFDM. Simulations show that these techniques provide low-computational, fast and quite robust synchronization methods.
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