Patent ID: 8446894

Claim:
An apparatus for performing initial synchronization in a wireless device comprising: a first synchronizer in the wireless device configured to determine approximate timing of a frame boundary for a received signal; a frequency offset estimator in the wireless device configured to estimate a frequency offset associated with symbol boundaries within the received signal; and a second synchronizer in the wireless device configured to determine precise timing information of the received signal, wherein the second synchronizer is configured to: calculate a time domain channel impulse response (CIR) of the received signal, wherein the second synchronizer includes a CIR estimator configured to determine a frequency domain preamble symbol of the received signal and perform an inverse fast Fourier transform (IFFT) on the frequency domain preamble symbol to derive the time domain CIR; identify a first peak in the calculated time domain CIR; and determine precise timing information by deriving a timing associated with the identified first peak in the calculated time domain CIR of the received signal.