Back to results
US 9,538,537 B1Granted
Blind carrier synchronization method for OFDM wireless communication systems
AssigneePhasorLab, Inc.
InventorsJian Cui, Joshua C. Park
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneePhasorLab, Inc.
InventorsJian Cui, Joshua C. Park
Estimating the term…
Systems and methods are disclosed herein for blind frequency synchronization. In one embodiment, a method is disclosed, comprising: downconverting a received orthogonal frequency division multiplexed (OFDM) signal to baseband; identifying, from the downconverted received signal, a series of OFDM symbols in the time domain; performing a fast Fourier transform (FFT) on a block of several time domain samples to turn the time domain OFDM symbols into frequency domain OFDM symbols, one sample per subcarrier in the received OFDM signal; computing a cross-correlation between in-phase and quadrature samples in each subcarrier and for each frequency domain OFDM symbol, wherein the cross-correlation may be computed as a sum of products of either squares or absolute values of the in-phase and quadrature samples; and summing the computed cross-correlation across the series of symbols and across all subcarriers to determine a frequency offset for the received OFDM signal.
A method, comprising:
A blind frequency synchronization method comprising:
A system, comprising:
Dependencies are inferred from the claim text.