Detecting Repeated Preamble Symbols Using Over-Sized Discrete Fourier Transforms

摘要

A technique for detecting symbols includes performing an over-sized discrete Fourier transform (DFT) operation on a received signal that includes at least two repeated symbols. A sum of signal characteristics for subcarriers of one or more possible symbols are determined based on the DFT operation. A sum of signal characteristics for non-subcarriers of the one or more possible symbols is determined based on the DFT operation. Finally, a determination is made as to whether one or more of the one or more possible symbols is detected based on the sum of signal characteristics for the subcarriers and sum of signal characteristics for the non-subcarriers.

主权项

1. A method of detecting symbols by a receiver, comprising:
performing, by a receiver, an over-sized discrete Fourier transform (DFT) operation on a received signal that includes at least two repeated symbols; determining, by the receiver, a sum of signal characteristics for a first set of subcarriers, the first set of subcarriers are assigned to of one or more possible symbols based on the DFT operation; determining, by the receiver, a sum of signal characteristics for a second set of subcarriers, the second set of subcarriers are not assigned to the one or more possible symbols based on the DFT operation; and determining, by the receiver, whether one or more of the one or more possible symbols is detected based on the sum of signal characteristics for the first set of subcarriers and sum of signal characteristics for the second set of subcarriers.