System and Method for Pre-FFT OFDM Fine Synchronization
AssigneeZoran Corporation
InventorsNoam Galperin, Yonatan Manor
Life of this patent
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Abstract
A synchronization unit for performing timing synchronization in the time domain includes storage, a multiplier, a signal analyzer, and a timing error estimation unit. The storage stores a reference signal. The multiplier calculates a sum of minus one product shift and a sum of plus one product shift based on the reference signal. The signal analyzer calculates left and right cross-correlation points based on the sum or minus one product shift and the sum of plus one product shift. The timing error estimation unit estimates a timing error of a received signal based on the left cross-correlation point and right cross-correlation point.
Claims23
A synchronization unit for performing timing synchronization in the time domain, the synchronization unit comprises:
- storage for digitally storing at least a reference signal;
- a multiplier, coupled to the storage, capable of calculating a sum of minus one product shift and a sum of plus one product shift, based on at least said reference signal;
- a signal analyzer capable of calculating left and right cross-correlation points based on said minus one product shift and said sum of plus one product shift;
- a timing error estimation unit capable of estimating the timing error of a received signal based on said left cross-correlation point and said right cross-correlation point.
A method for estimating timing error of a received signal, comprising:
- calculating a sum of plus one product shift and a sum of minus one product shift;
- calculating left and right cross-correlation points, based on said sum of plus one product shift and said sum of minus one product shift;
- estimating said timing error based on said left and the right cross-correlation points.
Dependencies are inferred from the claim text.