Patent ID: 7388901
Filing Date: 2008-06-17
Classification: H04B,H04J,H04L

Abstract:
1. An apparatus, comprising: means for receiving a signal, the signal comprising a preamble comprising a sequence of known symbols spread in frequency by a pseudo-random sequence, followed by a sequence of information symbols spread in frequency by the pseudo-random sequence; means for forming a baseband signal based at least in part on the received signal; means for performing a correlation between the baseband signal and the pseudo-random sequence at least in a portion of the signal corresponding to information symbols in order to obtain a correlation signal, the correlating means being capable of performing a correlation on at least one of an in-phase component of the baseband signal and a quadrature component of the baseband signal to obtain at least one or more correlation components, the means for performing a correlation comprising; means for demodulating the correlation signal to obtain a demodulation signal; means for restoring the information symbols; and means for correcting a frequency shift in the received signal, said means for correcting a frequency shift comprising: